WO2017045180A1 - Method, apparatus and system for transmitting control information - Google Patents

Abstract

Disclosed are a method, apparatus and system for transmitting control information. The method for transmitting control information comprises: configuring DCI, wherein the DCI is used to schedule PDSCH transmission, the number of information bits of the DCI is the same as the number of information bits of DCI format 1A, and the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation method; sending the DCI to at least one terminal device; and sending a PDSCH to the at least one terminal device. By means of the embodiments of the present invention, a large delay cyclic delay diversity transmission mode or a discontinuous resource block allocation method can be adopted in SC-PTM transmission.

Description

Method, device and system for transmitting control information Technical field

The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for transmitting control information.

Background technique

Single-cell point-to-multipoint (SC-PTM) transmission refers to transmitting multicast data on a Physical Downlink Share Channel (PDSCH). During the SC-PTM transmission process, the network device sends downlink control information (Downlink Control Information, DCI) carried on the Physical Downlink Control Channel (PDCCH) to a group of user equipments (UEs) in a cell. Then, the group of UEs receives the multicast data carried by the multicast PDSCH according to the scheduling information included in the DCI (different from the PDSCH carrying the unicast data, and the PDSCH carrying the multicast data is called the multicast PDSCH). The PDCCH is a combination of L Control Channel Elements (CCEs), and L is a positive integer called Aggregation Level (AL). The search space is a candidate PDCCH (PDCCH candidate) set. The terminal device needs to monitor each candidate PDCCH, so the search space is also the PDCCH set monitored by the terminal device. Each aggregation level corresponds to one search space. Currently, the search space includes two types: Common Search Space (CSS) and UE Specific Search Space (UESS). The CSS is a search space that multiple UEs in the cell have to listen to, and the UESS is a search space that a specific UE needs to monitor in the cell.

For SC-PTM transmission, the network equipment can be configured with three downlink transmission modes: Single-antenna port (port 0), Transmit diversity, and Large delay Cyclic Delay Diversity (Large). Delay CDD). Currently, for single antenna ports and transmit diversity, network devices can configure DCI formats as DCI Format 1A and DCI Format 1. For large delay cyclic delay diversity, the network device can configure the DCI format as DCI Format 2A. Among them, DCI Format 1A is used for continuous resource block (RB) The DCI Format 1 and DCI Format 2A are used for non-contiguous RB allocation. Since the DCI indicating the SC-PTM transmission is configured to a group of terminal devices, the DCI can only be carried by using the PDCCH located in the CSS. However, in the existing system, the PDCCH carrying DCI Format 1 and DCI Format 2A cannot be located in the CSS and can only be located in the UESS. Therefore, for SC-PTM transmission, the network device cannot configure DCI Format 1 and DCI Format 2A, and thus the network device cannot configure large delay cyclic delay diversity, and cannot configure non-contiguous resource block allocation.

Summary of the invention

The embodiment of the invention provides a method, a device and a system for transmitting control information, which can adopt a large delay cyclic delay diversity transmission mode or a discontinuous resource block allocation mode in SC-PTM transmission.

A first aspect of the present invention provides a method for transmitting control information, including:

The network device configures a DCI, where the DCI is used to schedule PDSCH transmission, the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource. Block allocation method;

Transmitting, by the network device, the DCI to at least one terminal device;

The network device sends the PDSCH to the at least one terminal device.

In a first possible implementation manner, the DCI includes an MCS domain, where the MCS domain is used to indicate an MCS used by two transport blocks, and the two transport blocks adopt the same MCS.

In conjunction with the possible implementation of the first aspect, in a second possible implementation, the DCI includes a first MCS domain and a second MCS domain, where:

The first MCS field is used to indicate the MCS used by the first transport block, and the second MCS field is used to indicate the MCS used by the second transport block, where the information bits of the two MCS domains are the same; or

The first MCS field is used to indicate the MCS used by the first transport block, the second MCS field is used to indicate the MCS used by the second transport block, and the MCS adopted by the second transport block is The value of the first MCS field is added to the value of the second MCS field, and the number of information bits of the second MCS field is less than the number of information bits of the first MCS field.

With reference to the first aspect, the first or the second possible implementation manner of the first aspect, in a third possible implementation, before the network device sends the PDSCH to the at least one terminal device, :

The network device configures a mapping of a transport block to a codeword according to a preset mapping relationship;

The preset mapping relationship is:

When the PDSCH is transmitted by using two transport blocks, the first transport block corresponds to codeword 0 and the second transport block corresponds to codeword 1, or the second transport block corresponds to codeword 0 and the first transport block corresponds to codeword 1;

When the PDSCH is transmitted by using the first transport block, the first transport block corresponds to codeword 0;

When the PDSCH is transmitted by using the second transport block, the second transport block corresponds to codeword 0.

With reference to the first aspect, the first or the second possible implementation manner of the first aspect, in a fourth possible implementation, the DCI includes a transport block to a codeword exchange identifier field, and the transport block to code The word exchange identifier field is used to indicate the mapping relationship between the transport block and the codeword.

With reference to the first aspect, or any one of the first to the fourth possible implementation manners of the first aspect, in the fifth possible implementation, before the network device configures the DCI, the network device further includes:

The transmission scheme of the network device configuring the PDSCH is a large delay cyclic delay diversity, and the PDSCH transmission is configured to adopt two transmit antennas.

With reference to the first aspect, or any one of the first to fourth possible implementations of the first aspect, in a sixth possible implementation, the DCI includes a precoding information field, and the precoding information domain Used to indicate the number of layers.

With reference to the first aspect, or any one of the first to the sixth possible implementation manners of the first aspect, in a seventh possible implementation, the DCI includes a transmission scheme identifier field, and the transmission scheme identifier domain The transmission scheme used to identify the PDSCH is large delay cyclic delay diversity or transmit diversity.

With reference to the first aspect, or any one of the first to seventh possible implementations of the first aspect, in an eighth possible implementation, the DCI includes a resource block allocation domain, and the resource block allocation domain A bitmap is included, the bitmap is used to indicate the allocated at least one RBG, and one RBG is composed of Q consecutive LVRBs, where Q is an integer greater than P, P=1, 2, 3 or 4.

With reference to the first aspect, or any one of the first to seventh possible implementation manners of the first aspect, in a ninth possible implementation manner, the DCI includes a resource block allocation domain, where the resource block allocation The field is used to indicate the allocated LVRB, the LVRB is located in one RBG subset, and the RBG subset is one of the Q RBG subsets, where Q is an integer greater than P, P=1, 2, 3 or 4.

With reference to the first aspect, or any one of the first to seventh possible implementations of the first aspect, in a tenth possible implementation, the DCI includes a resource block allocation domain, and the resource block allocation domain For indicating two resource block sets, each of the resource block sets includes one or more consecutive RBGs, and one RBG is composed of P consecutive LVRBs, where P=1, 2, 3 or 4.

With reference to the first aspect, or any one of the first to the seventh possible implementation manners of the first aspect, in the eleventh possible implementation, before the network device configures the DCI, the network device further includes:

Determining, by the network device, an available transmission bandwidth, where the available transmission bandwidth is less than a downlink system bandwidth;

The network device configuring the DCI includes:

The network device configuring the DCI includes a resource block allocation domain, and the resource block indicated by the resource block allocation domain is located within the available transmission bandwidth.

With the possible implementation of any one of the eighth to eleventh aspects of the first aspect, in the twelfth possible implementation, the DCI further includes a resource allocation manner identifier field, and the resource allocation manner identifier The domain is used to identify that the resource allocation mode is a continuous resource block allocation or a non-contiguous resource block allocation.

With reference to the first aspect or the first to twelfth possible implementation manners of the first aspect, in a thirteenth possible implementation manner, the DCI is located in a CSS or a GSS;

Before the network device sends the DCI to the at least one terminal device, the method further includes:

The network device is configured with a CSS and/or a GSS, where the CSS is composed of the first 16 control channel units CCEs in the downlink control region, and the GSS is composed of N CCEs other than the first 16 CCEs in the downlink control region. N is a positive integer greater than one.

With reference to the thirteenth possible implementation manner of the first aspect, in the fourteenth possible implementation manner, the GSS and the CSS are continuously distributed, and the number of CCEs included in the GSS is:

为聚合级别为L时，GSS中候选PDCCH的数量，

为聚合级别为L时，CSS中候选PDCCH的数量，N_CCE,k为子帧k上的CCE的数量，L为4或8。Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L,

When the aggregation level is L, the number of candidate PDCCHs in the CSS, N _CCE,k is the number of CCEs on the subframe k, and L is 4 or 8.

Combining the thirteenth possible implementation of the first aspect, in the fifteenth possible implementation The GSS is determined according to the cell radio network temporary identifier G-NRT1, and the number of the CCE included in the GSS is

为聚合级别为L时，GSS中候选PDCCH的数量，Y_k＝(A·Y_k-1)mod D，Y_-1＝n_RNT1≠0，A＝39827，D＝65537，

n_s为一个无线帧的时隙序号，n_RNT1为G-NRT1值，L为4或8。Where i=0,...,L-1,

When the aggregation level is L, the number of candidate PDCCHs in the GSS, Y _k = (A·Y _k-1 ) mod D, Y _-1 = n _RNT1 ≠ 0, A = 39827, D = 65537,

n _s is the slot number of a radio frame, n _RNT1 is the G-NRT1 value, and L is 4 or 8.

In conjunction with the possible implementation of the thirteenth to fifteenth aspects of the first aspect, in the sixteenth possible implementation, the configuring, by the network device, the CSS and/or the GSS includes:

The network device configures a first subframe set, and configures a GSS on the first subframe set, where the subframe in the first subframe set satisfies (10×n _f +n _sbf -n _OFFSET ) modM =0, n _f represents the system frame number, n _sbf represents the subframe number, and n _OFFSET represents the offset subframe number.

A second aspect of the present invention provides a method for transmitting control information, including:

The terminal device receives the DCI sent by the network device, where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A;

The terminal device acquires scheduling information for PDSCH transmission from the DCI, where the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation manner;

The terminal device receives the PDSCH sent by the network device according to the scheduling information.

In a first possible implementation manner, the DCI includes an MCS domain;

Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including:

The terminal device determines that the MCS used by the two transport blocks is the value of the MCS domain, where the two transport blocks adopt the same MCS.

With reference to the possible implementation of the second aspect, in a second possible implementation, the DCI includes a first MCS domain and a second MCS domain;

Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including:

Determining, by the terminal device, that the MCS used by the first transport block is the value of the first MCS domain, and the MCS used by the second transport block is a value of the second MCS domain; or

The terminal device determines that the MCS used by the first transport block is the value of the first MCS domain, and the MCS used by the second transport block is the value of the first MCS domain and the second MCS domain. The sum of the values of the second MCS field is smaller than the number of information bits of the first MCS domain.

With reference to the second aspect, the first aspect of the second aspect, or the second possible implementation manner of the second aspect, in a third possible implementation, the terminal device receives, according to the scheduling information, the network device sends Before the PDSCH, the method further includes:

Determining, by the terminal device, a mapping of a transport block to a codeword according to a preset mapping relationship;

The preset mapping relationship is:

When the PDSCH is transmitted by using two transport blocks, the first transport block corresponds to codeword 0 and the second transport block corresponds to codeword 1, or the second transport block corresponds to codeword 0 and the first transport block corresponds to codeword 1;

When the PDSCH is transmitted by using the first transport block, the first transport block corresponds to codeword 0;

When the PDSCH is transmitted by using the second transport block, the second transport block corresponds to codeword 0.

With reference to the second aspect, the first aspect of the second aspect, or the second possible implementation manner of the second aspect, in a fourth possible implementation, the DCI includes a transport block to a codeword exchange identifier field;

Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including:

The terminal device determines a mapping relationship between the transport block and the codeword according to the transport block to the codeword exchange identifier field.

With reference to the second aspect, or any one of the first to the fourth possible implementation manners of the second aspect, in a fifth possible implementation manner, the terminal device receives, according to the scheduling information, the network device sends Before the PDSCH, the method further includes:

The terminal device determines that the transmission scheme of the PDSCH is a large delay cyclic delay diversity, and determines that the PDSCH transmission uses two transmit antennas.

With reference to the second aspect, or any one of the first to the fourth possible implementation manners of the second aspect, in a sixth possible implementation, the DCI includes a precoding information field;

Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including:

The terminal device determines the number of layers according to the precoding information field.

With reference to the second aspect, or any one of the first to the sixth possible implementation manners of the second aspect, in a seventh possible implementation, the DCI includes a transmission scheme identifier field;

Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including:

Determining, by the terminal device, that the transmission scheme of the PDSCH is large according to the transmission scheme identifier field Delay cyclic delay diversity or transmit diversity.

With reference to the second aspect, or any one of the first to seventh possible implementations of the second aspect, in an eighth possible implementation, the DCI includes a resource block allocation domain, and the resource block allocation domain Including a bitmap;

Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including:

The terminal device determines the allocated at least one RBG according to the bitmap, and one RBG is composed of Q consecutive LVRBs, where Q is an integer greater than P, P=1, 2, 3 or 4.

With reference to the second aspect, or any one of the first to the seventh possible implementation manners of the second aspect, in a ninth possible implementation manner, the DCI includes a resource block allocation domain;

Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including:

The terminal device determines the allocated LVRB according to the resource block allocation field, where the LVRB is located in one RBG subset, and the RBG subset is one of the Q RBG subsets, where Q is an integer greater than P, P= 1, 2, 3 or 4.

With reference to the second aspect, or any one of the first to the seventh possible implementation manners of the second aspect, in a tenth possible implementation manner, the DCI includes a resource block allocation domain;

Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including:

Determining, by the terminal device, two resource block sets according to the resource block allocation domain, each of the resource block sets includes one or more consecutive RBGs, and one RBG is composed of P consecutive LVRBs, where P=1, 2 , 3 or 4.

With reference to the second aspect, or any one of the first to the seventh possible implementation manners of the second aspect, in the eleventh possible implementation manner, the DCI includes a resource block allocation domain;

Before the terminal device acquires the scheduling information for the PDSCH transmission from the DCI, the method further includes:

Determining, by the terminal device, an available transmission bandwidth, where the available transmission bandwidth is smaller than a downlink system bandwidth;

Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including:

And determining, by the terminal device, the allocated at least one resource block according to the resource block allocation domain, where the allocated at least one resource block is located in the available transmission bandwidth.

With the possible implementation of any one of the eighth to eleventh aspects of the second aspect, in the twelfth possible implementation, the DCI further includes a resource allocation manner identifier field;

Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including:

The terminal device determines, according to the resource allocation manner identifier field, that the resource allocation manner is a continuous resource block allocation or a discontinuous resource block allocation.

With reference to the second aspect, or any one of the first to the twelfth possible implementation manners of the second aspect, in the thirteenth possible implementation manner, the receiving, by the terminal device, the DCI sent by the network device includes:

The terminal device determines a search space, where the search space is CSS and/or GSS, and the CSS is composed of the first 16 CCEs in the downlink control region, and the GSS is other than the first 16 CCEs in the downlink control region. N CCE components, N is a positive integer greater than 1;

The terminal device acquires the DCI in the search space.

With reference to the thirteenth possible implementation of the second aspect, in the fourteenth possible implementation manner, the GSS and the CSS are continuously distributed, and the number of the CCEs included in the GSS is:

为聚合级别为L时，GSS中候选PDCCH的数量，

为聚合级别为L时，CSS中候选PDCCH的数量，N_CCE,k为子帧k上的CCE的数量，L为4或8。Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L,

When the aggregation level is L, the number of candidate PDCCHs in the CSS, N _CCE,k is the number of CCEs on the subframe k, and L is 4 or 8.

With reference to the thirteenth possible implementation manner of the second aspect, in the fifteenth possible implementation manner, the GSS is determined according to G-NRT1, and the number of CCEs included in the GSS is

为聚合级别为L时，GSS中候选PDCCH的数量，Y_k＝(A·Y_k-1)mod D，Y_-1＝n_RNT1≠0，A＝39827，D＝65537，

n_s为一个无线帧的时隙序号，n_RNT1为G-NRT1值，L为4或8。Where i=0,...,L-1,

When the aggregation level is L, the number of candidate PDCCHs in the GSS, Y _k = (A·Y _k-1 ) mod D, Y _-1 = n _RNT1 ≠ 0, A = 39827, D = 65537,

n _s is a slot number in one radio _frame, n RNT1 value for the G-NRT1, L is 4 or 8.

With reference to the possible implementation of any one of the thirteenth to fifteenth aspects of the second aspect, in the sixteenth possible implementation, the determining, by the terminal device, the search space includes:

The terminal device detects a GSS on the first subframe set, where the subframe in the first subframe set satisfies (10×n _f +n _sbf −n _OFFSET ) modM=0, where n _f represents a system frame number, n _sbf indicates a subframe number, n _oFFSET represents the offset of the subframe number.

A third aspect of the present invention provides a device for transmitting control information, including:

a configuration unit, configured to configure a DCI, where the DCI is used to schedule a PDSCH transmission, where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or Non-contiguous resource block allocation method;

a sending unit, configured to send the DCI to at least one terminal device;

The sending unit is further configured to send the PDSCH to the at least one terminal device.

In a first possible implementation manner, the DCI includes an MCS domain, where the MCS domain is used to indicate an MCS used by two transport blocks, and the two transport blocks adopt the same MCS.

In conjunction with the possible implementation of the third aspect, in a second possible implementation, the DCI includes a first MCS domain and a second MCS domain, where:

The first MCS field is used to indicate the MCS used by the first transport block, and the second MCS field is used to indicate the MCS used by the second transport block, the number of information bits of the first MCS domain, and the The number of information bits of the second MCS domain is the same; or

The first MCS field is used to indicate the MCS used by the first transport block, the second MCS field is used to indicate the MCS used by the second transport block, and the MCS adopted by the second transport block is The value of the first MCS field is added to the value of the second MCS field, and the number of information bits of the second MCS field is less than the number of information bits of the first MCS field.

With reference to the third aspect, the first or the second possible implementation manner of the third aspect, in a third possible implementation, the configuration unit is further configured to send, by the sending unit, the at least one terminal Before the device sends the PDSCH, the mapping of the transport block to the codeword is configured according to a preset mapping relationship;

The preset mapping relationship is:

When the PDSCH is transmitted by using two transport blocks, the first transport block corresponds to codeword 0 and the second transport block corresponds to codeword 1, or the second transport block corresponds to codeword 0 and the first transport block corresponds to codeword 1;

When the PDSCH is transmitted by using the first transport block, the first transport block corresponds to codeword 0;

When the PDSCH is transmitted by using the second transport block, the second transport block corresponds to codeword 0.

With reference to the third aspect, the first or the second possible implementation manner of the third aspect, in a fourth possible implementation, the DCI includes a transport block to a codeword exchange identifier field, and the transport block to code The word exchange identifier field is used to indicate the mapping relationship between the transport block and the codeword.

With reference to the third aspect, or any one of the first to fourth possible implementation manners of the third aspect, in a fifth possible implementation, the configuration unit is further configured to: before configuring the DCI, The transmission scheme of the PDSCH is configured as a large delay cyclic delay diversity, and the PDSCH transmission is configured to use two transmit antennas.

With reference to the third aspect, or any one of the first to fourth possible implementation manners of the third aspect, in a sixth possible implementation, the DCI includes a precoding information field, and the precoding information domain Used to indicate the number of layers.

With reference to the third aspect, or any one of the first to the sixth possible implementation manners of the third aspect, in a seventh possible implementation, the DCI includes a transmission scheme identifier field, and the transmission scheme identifier domain The transmission scheme used to identify the PDSCH is large delay cyclic delay diversity or transmit diversity.

With reference to the third aspect, or any one of the first to seventh possible implementation manners of the third aspect, in the eighth possible implementation, the DCI includes a resource block allocation domain, where the resource block allocation domain A bitmap is included, the bitmap is used to indicate the allocated at least one RBG, and one RBG is composed of Q consecutive LVRBs, where Q is an integer greater than P, P=1, 2, 3 or 4.

With reference to the third aspect, or any one of the first to the seventh possible implementation manners of the third aspect, in a ninth possible implementation manner, the DCI includes a resource block allocation domain, where the resource block allocation domain LVRB for indicating allocation, the LVRB is located in one RBG subset, and the RBG subset is one of Q RBG subsets, where Q is an integer greater than P, P=1, 2, 3 or 4.

With reference to the third aspect, or any one of the first to seventh possible implementation manners of the third aspect, in a tenth possible implementation manner, the DCI includes a resource block allocation domain, and the resource block allocation domain For indicating two resource block sets, each of the resource block sets includes one or more consecutive RBGs, and one RBG is composed of P consecutive LVRBs, where P=1, 2, 3 or 4.

With reference to the third aspect, or any one of the first to the seventh possible implementation manners of the third aspect, in an eleventh possible implementation manner, the device further includes:

a determining unit, configured to determine an available transmission bandwidth, where the available transmission bandwidth is smaller than a downlink system bandwidth, before the configuration unit configures the DCI;

The configuration unit is configured to configure the DCI to include a resource block allocation domain, where the resource block indicated by the resource block allocation domain is located in the available transmission bandwidth.

With the possible implementation of any one of the eighth to eleventh aspects of the third aspect, in a twelfth possible implementation, the DCI further includes a resource allocation manner identifier field, where the resource allocator The identifier field is used to identify that the resource allocation mode is a continuous resource block allocation or a non-contiguous resource block allocation.

With reference to the third aspect, or any one of the first to the twelfth possible implementation manners of the third aspect, in the thirteenth possible implementation manner, the DCI is located in the CSS or the GSS;

The configuration unit is further configured to configure CSS and/or GSS before the sending unit sends the DCI to the at least one terminal device, where the CSS is composed of the first 16 control channel units CCE in the downlink control region, The GSS is composed of N CCEs other than the first 16 CCEs in the downlink control region, and N is a positive integer greater than 1.

The thirteenth possible combination of the third aspect is an implementation manner. In the fourteenth possible implementation manner, the GSS and the CSS are continuously distributed, and the number of CCEs included in the GSS is:

为聚合级别为L时，GSS中候选PDCCH的数量，

为聚合级别为L时，CSS中候选PDCCH的数量，N_CCE,k为子帧k上的CCE的数量，L为4或8。Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L,

When the aggregation level is L, the number of candidate PDCCHs in the CSS, N _CCE,k is the number of CCEs on the subframe k, and L is 4 or 8.

The thirteenth possible combination of the third aspect is an implementation manner. In the fifteenth possible implementation manner, the GSS is determined according to the cell radio network temporary identifier G-NRT1, and the CGS includes the CCE. No;

为聚合级别为L时，GSS中候选PDCCH的数量，Y_k＝(A·Y_k-1)mod D，Y_-1＝n_RNT1≠0，A＝39827，D＝65537，

n_s为一个无线帧的时隙序号，n_RNT1为G-NRT1值，L为4或8。Where i=0,...,L-1,

When the aggregation level is L, the number of candidate PDCCHs in the GSS, Y _k = (A·Y _k-1 ) mod D, Y _-1 = n _RNT1 ≠ 0, A = 39827, D = 65537,

n _s is the slot number of a radio frame, n _RNT1 is the G-NRT1 value, and L is 4 or 8.

In combination with any one of the thirteenth to fifteenth aspects of the third aspect, the configuration unit may be configured to configure the first subframe set, and in the sixteenth possible implementation manner, Configuring a GSS on the first subframe set, wherein the subframe in the first subframe set satisfies (10×n _f +n _sbf −n _OFFSET ) modM=0, n _f represents a system frame number, n _sbf Indicates the subframe number, and n _OFFSET indicates the offset subframe number.

A fourth aspect of the present invention provides a network device, including a processor, a memory, and a transmitter, wherein the memory stores a set of program codes, and the processor invokes the The program code stored in the memory is configured to: configure a DCI, where the DCI is used to schedule a PDSCH transmission, where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission is large. Extended cyclic delay diversity transmission mode and/or discontinuous resource block allocation mode;

Transmitting, by the transmitter, the DCI to at least one terminal device;

Transmitting the PDSCH to the at least one terminal device by the transmitter.

A fifth aspect of the present invention provides a device for transmitting control information, including:

a receiving unit, configured to receive a DCI sent by the network device, where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A;

An acquiring unit, configured to acquire scheduling information for PDSCH transmission from the DCI, where the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation manner;

The receiving unit is further configured to receive, according to the scheduling information, the PDSCH sent by the network device.

In a first possible implementation manner, the DCI includes an MCS domain;

The acquiring unit is configured to determine that the MCS used by the two transport blocks is the value of the MCS domain, where the two transport blocks adopt the same MCS.

With reference to the possible implementation manner of the fifth aspect, in a second possible implementation manner, the DCI includes a first MCS domain and a second MCS domain;

The acquiring unit is configured to determine that the MCS used by the first transport block is the value of the first MCS domain, and the MCS used by the second transport block is a value of the second MCS domain; or

The terminal device determines that the MCS used by the first transport block is the value of the first MCS domain, and the MCS used by the second transport block is the value of the first MCS domain and the second MCS domain. The sum of the values of the second MCS field is smaller than the number of information bits of the first MCS domain.

With reference to the fifth aspect, the first or the second possible implementation manner of the fifth aspect, in a third possible implementation, the apparatus further includes:

a determining unit, configured to determine, according to a preset mapping relationship, a mapping of a transport block to a codeword before the receiving unit receives the PDSCH sent by the network device according to the scheduling information;

The preset mapping relationship is:

When the PDSCH is transmitted by using two transport blocks, the first transport block corresponds to codeword 0 and the second transport block corresponds to codeword 1, or the second transport block corresponds to codeword 0 and the first transport block corresponds to codeword 1;

When the PDSCH is transmitted by using the first transport block, the first transport block corresponds to codeword 0;

When the PDSCH is transmitted by using the second transport block, the second transport block corresponds to codeword 0.

With reference to the fifth aspect, the first or the second possible implementation manner of the fifth aspect, in a fourth possible implementation, the DCI includes a transport block to a codeword exchange identifier field;

And the acquiring unit is configured to determine, according to the transport block to the codeword exchange identifier field, a mapping relationship between the transport block and the codeword.

With reference to the fifth aspect, or any one of the first to the fourth possible implementation manners of the fifth aspect, in a fifth possible implementation, the device further includes:

a determining unit, configured to determine, by the receiving unit, that the PDSCH transmission scheme is a large delay cyclic delay diversity before receiving the PDSCH sent by the network device according to the scheduling information, and determining that the PDSCH transmission adopts two Transmitting antenna.

With reference to the fifth aspect, or any one of the first to fourth possible implementation manners of the fifth aspect, in a sixth possible implementation, the DCI includes a precoding information field;

The acquiring unit is configured to determine a layer number according to the precoding information field.

With reference to the fifth aspect, or any one of the first to the sixth possible implementation manners of the fifth aspect, in a seventh possible implementation, the DCI includes a transmission scheme identifier field;

The acquiring unit is configured to determine, according to the transmission scheme identifier field, that the transmission scheme of the PDSCH is a large delay cyclic delay diversity or a transmit diversity.

With reference to the fifth aspect, or any one of the first to the seventh possible implementation manners of the fifth aspect, in an eighth possible implementation, the DCI includes a resource block allocation domain, and the resource block allocation domain Including a bitmap;

The acquiring unit is configured to determine, according to the bitmap, at least one resource block group RBG that is allocated, where one RBG is composed of Q consecutive LVRBs, where Q is an integer greater than P, P=1, 2, 3, or 4 .

With reference to the fifth aspect, or any one of the first to the seventh possible implementation manners of the fifth aspect, in a ninth possible implementation manner, the DCI includes a resource block allocation domain;

And the acquiring unit is configured to determine, according to the resource block allocation domain, the allocated LVRB, where the LVRB is located in one RBG subset, and the RBG subset is one of the Q RBG subsets, where Q is an integer greater than P , P = 1, 2, 3 or 4.

With reference to the fifth aspect, or any one of the first to the seventh possible implementation manners of the fifth aspect, in a tenth possible implementation manner, the DCI includes a resource block allocation domain;

The acquiring unit is configured to determine two resource block sets according to the resource block allocation domain, where each of the resource block sets includes one or more consecutive RBGs, and one RBG is composed of P consecutive LVRBs, where P= 1, 2, 3 or 4.

With reference to the fifth aspect, or any one of the first to the seventh possible implementation manners of the fifth aspect, in an eleventh possible implementation manner, the DCI includes a resource block allocation domain;

The device also includes:

a determining unit, configured to determine an available transmission bandwidth, where the available transmission bandwidth is smaller than a downlink system bandwidth, before the acquiring unit acquires scheduling information for the PDSCH transmission from the DCI;

And the acquiring unit is configured to determine, according to the resource block allocation domain, the allocated at least one resource block, where the allocated at least one resource block is located in the available transmission bandwidth.

With the possible implementation of any one of the eighth to the eleventh aspects of the fifth aspect, in the twelfth possible implementation, the DCI further includes a resource allocation manner identifier field;

The acquiring unit is configured to determine, according to the resource allocation manner identifier field, that the resource allocation manner is a continuous resource block allocation or a discontinuous resource block allocation.

With reference to the fifth aspect, or any one of the first to the twelfth possible implementation manners of the fifth aspect, in a thirteenth possible implementation manner, the receiving unit is configured to determine a search space, The search space is CSS and/or GSS, and the CSS is composed of the first 16 CCEs in the downlink control region, and the GSS is composed of N CCEs other than the first 16 CCEs in the downlink control region, and N is greater than 1. Positive integer

The receiving unit is further configured to acquire the DCI in the search space.

With reference to the thirteenth possible implementation manner of the fifth aspect, in the fourteenth possible implementation manner, the GSS and the CSS are continuously distributed, and the number of CCEs included in the GSS is:

为聚合级别为L时，GSS中候选 PDCCH的数量，

为聚合级别为L时，CSS中候选PDCCH的数量，N_CCE,k为子帧k上的CCE的数量，L为4或8。Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L,

When the aggregation level is L, the number of candidate PDCCHs in the CSS, N _CCE,k is the number of CCEs on the subframe k, and L is 4 or 8.

With reference to the thirteenth possible implementation manner of the fifth aspect, in the fifteenth possible implementation manner, the GSS is determined according to the cell radio network temporary identifier G-NRT1, and the number of the CCE included in the GSS is for;

为聚合级别为L时，GSS中候选PDCCH的数量，Y_k＝(A·Y_k-1)mod D，Y_-1＝n_RNT1≠0，A＝39827，D＝65537，

n_s为一个无线帧的时隙序号，n_RNT1为G-NRT1值，L为4或8。Where i=0,...,L-1,

When the aggregation level is L, the number of candidate PDCCHs in the GSS, Y _k = (A·Y _k-1 ) mod D, Y _-1 = n _RNT1 ≠ 0, A = 39827, D = 65537,

n _s is the slot number of a radio frame, n _RNT1 is the G-NRT1 value, and L is 4 or 8.

With reference to the possible implementation of any one of the thirteenth to fifteenth aspects of the fifth aspect, in the sixteenth possible implementation, the receiving unit is configured to detect the GSS on the first subframe set , wherein the subframe in the first subframe set satisfies (10×n _f +n _sbf −n _OFFSET ) modM=0, n _f represents a system frame number, n _sbf represents a subframe number, and n _OFFSET represents an offset subframe. Frame number.

A sixth aspect of the present invention provides a terminal device, including a processor, a memory, and a receiver, wherein the memory stores a set of program codes, and the processor calls program code stored in the memory for execution The following operations: receiving, by the receiver, a DCI sent by a network device, where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A;

Obtaining scheduling information for PDSCH transmission from the DCI, where the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation manner;

Receiving, by the receiver, the PDSCH sent by the network device according to the scheduling information.

A seventh aspect of the present invention provides a transmission system for control information, comprising: a transmission device for control information according to the third aspect; and a transmission device for control information according to the fifth aspect.

In the embodiment of the present invention, the network device configures the DCI, where the DCI is used to schedule the PDSCH transmission, the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or non- Continuing resource block allocation mode, sending DCI to at least one terminal device, and transmitting PDSCH to at least one terminal device, which can be adopted in SC-PTM transmission Use large delay loop delay diversity transmission mode or discontinuous resource block allocation mode.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative work.

1 is a schematic flowchart of a method for transmitting control information according to a first embodiment of the present invention;

2 is a schematic flowchart of a method for transmitting control information according to a second embodiment of the present invention;

3 is a schematic flowchart of a method for transmitting control information according to a third embodiment of the present invention;

4 is a schematic flowchart of a method for transmitting control information according to a fourth embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a device for transmitting control information according to a first embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a device for transmitting control information according to a second embodiment of the present invention; FIG.

FIG. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a transmission system for controlling information according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the traditional method of transmitting control information, for SC-PTM, the network device can be configured with three downlink transmission modes: single antenna port, transmit diversity, and large delay cyclic delay diversity. The LTE system is used as an example. Before receiving the downlink data, the terminal device needs to obtain the scheduling information, such as the time-frequency resource allocation mode or the modulation and coding mode, configured by the network device, where the scheduling information is located in the DCI. In order to support single antenna port, transmit diversity and large delay cyclic delay diversity, the current DCI includes three formats: DCI format 1A, DCI format 1 and DCI format 2A. Among them, DCI format 1A is used for compact scheduling of a PDSCH codeword. The "one PDSCH codeword" indicates that the DCI format 1A is used for the single antenna port and the transmit diversity, and the "compact scheduling" indicates that the resource allocation mode adopted by the DCI format 1A is the resource allocation mode 2. DCI format 1 is used for single antenna port or transmit diversity. The resource allocation mode is resource allocation mode 0 or 1. The DCI format 2A is used for large-latency cyclic delay diversity, and the resource allocation mode adopted is resource allocation mode 0 or 1. The current resource allocation method includes: resource allocation mode 0, 1, or 2. For the resource allocation mode 0, the resource block allocation information includes one bitmap, the bitmap indicates at least one resource block group (RBG) allocated, and one RBG is composed of P consecutive LVRBs, P= 1, 2, 3, or 4. For the resource allocation mode 1, the resource block allocation information indicates the allocated localized virtual resource RB (LVRB), and the allocated LVRB belongs to one RBG subset, and the one RBG subset is one of the P RBG subsets. For resource allocation mode 2, the resource block allocation information indicates a continuous resource block allocation, and the resource block may be an LVRB or a distributed virtual resource block (DVRB). Then DCI Format 1A can be used to indicate continuous resource block allocation, and DCI Format 1 and DCI Format 2A can be used to indicate non-contiguous resource block allocation. Since the DCI for the SC-PTM transmission is configured for a group of terminal devices, the DCI can only be carried by using the PDCCH located in the CSS. In addition, the PDCCH carrying DCI Format 1 and DCI Format 2A cannot be located in the CSS and can only be located in the UESS. Therefore, for SC-PTM transmission, the network device cannot configure DCI Format 1 and DCI Format 2A, then the network device cannot configure large delay cyclic delay diversity, nor can it configure non-contiguous resource block allocation.

The embodiment of the present invention provides a method for transmitting control information. The network device configures DCI, where the DCI is used for scheduling PDSCH transmission. The number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission uses a large delay loop. Delay diversity transmission mode and/or non-contiguous resources In the block allocation mode, the DCI is sent to the at least one terminal device, and then the PDSCH is sent to the at least one terminal device, and the large delay cyclic delay diversity transmission mode or the discontinuous resource block allocation mode may be adopted in the SC-PTM transmission.

It should be understood that the technical solution of the embodiments of the present invention can be applied to various wireless communication systems for performing data transmission by scheduling, for example, Global System of Mobile communication (GSM) system, Code Division Multiple Access (Code Division Multiple Access) , CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE frequency division duplex (Frequency Division Duplex, FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS) or Worldwide Interoperability for Microwave Access (WiMAX) communication system Wait. However, for convenience of description, the following embodiments will be described by taking an LTE system as an example.

It should also be understood that, in the embodiment of the present invention, the network device may be a base station, and further, the base station may be a base station (BTS) in GSM or CDMA, or a base station (NodeB, NB) in WCDMA. It may also be an evolved base station (eNB) in LTE, which is not specifically limited by the embodiment of the present invention. The terminal device involved in the embodiments of the present invention may include a handheld device having a wireless communication function, an in-vehicle device, a wearable device, a computing device, or other processing device connected to the wireless modem, and various forms of user equipment (User Equipment, UE), mobile station (MS), terminal, etc. For convenience of description, the subsequent embodiments of the present invention are collectively referred to as terminal devices.

Referring to FIG. 1 , FIG. 1 is a schematic flowchart of a method for transmitting control information according to a first embodiment of the present invention. The method for transmitting control information in the embodiment of the present invention may include:

S101: The network device configures DCI, and the DCI is used to schedule PDSCH transmission. The number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation mode.

Preferably, the network device can configure the DCI. The DCI is used to schedule PDSCH transmission. The number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation mode.

Alternatively, the network device can configure the DCI. The DCI is used for scheduling PDSCH transmission. The number of information bits of the DCI is the same as the number of information bits of the DCI format 1C, and the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation mode. DCI format 1C is used for very tight scheduling of a PDSCH codeword.

Alternatively, the network device can configure the DCI. The DCI is used to schedule PDSCH transmission. The number of information bits of the DCI is the same as the number of information bits of the DCI format 1A/DCI format 1C. The PDSCH transmission uses a closed-loop spatial multiplexing scheme and/or a non-contiguous resource. Block allocation method. For convenience of description, embodiments involving a large delay cyclic delay diversity scheme can be used for closed loop space division multiplexing unless otherwise specified.

Further optionally, the large delay cyclic delay diversity transmission mode adopted by the PDSCH transmission may include a large delay cyclic delay diversity transmission scheme and/or a transmit diversity transmission scheme.

It should be noted that the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A/DCI format 1C, which can prevent the terminal device from increasing the number of PDCCH blind detections in the CSS.

If the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, the DCI may still be referred to as DCI format 1A, or as another DCI format, such as DCI format 1M. The network device redefines the meaning of the information bits contained in DCI format 1A, so that the information bits included in the redefined DCI format 1A are information bits of the DCI, which can be used to indicate large delay cyclic delay diversity transmission and/or non- Continuous resource block allocation. The information bits that are redefined may be useful information bits or useless information bits. For the SC-PTM transmission, if the retransmission is not supported, the terminal device does not need to report to the network device whether the PDSCH is correctly received, that is, the Hybrid Automatic Repeat Request (HARQ) feedback information is not required to be reported. Therefore, the information fields related to the HARQ feedback are useless, such as: HARQ process number, New data indicator (NDI), Redundancy version (RV), for PUCCH. TPC command for PUCCH, Downlink Assignment Index (DAI) (only exists in TDD systems). In addition, since DCI format 0 indicates uplink scheduling information and SC-PTM transmission is downlink transmission, the flag for distinguishing between format 0 and format 1A (Flag for format0/format1A differentiation) is also useless. Therefore, at least 9 bits are redundant in an FDD system; at least 11 bits are redundant in a TDD system. For SC-PTM transmission, when retransmission is supported, but the terminal device does not need When reporting the HARQ feedback information to the network device, the DCI still needs to include at least one information field of the HARQ process ID (which may be 1, 2, 3 or 4 bits), NDI, and RV. Embodiments of the present invention may utilize these redundant information bits to indicate information required for a large delay cyclic delay diversity transmission mode and/or a non-contiguous resource block allocation.

If the number of information bits of the DCI is the same as the number of information bits of the DCI format 1C, the DCI may still be referred to as DCI format 1C, or as another DCI format, such as DCI format 1M. Since DCI format 1C contains a small number of information bits, there is usually no useless information bits. The network device needs to pre-set some rules or redefine the useful information bits so that the DCI can be used to indicate large delay cyclic delay diversity transmission and/or non-contiguous resource block allocation.

In an alternative embodiment, the large delay cyclic delay diversity supports 2 transport blocks (TB), ie 2 code words. Therefore, in order to indicate that the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode, the DCI needs to include an information field for indicating a modulation and coding scheme (MCS) corresponding to two transport blocks.

For example, the DCI may include an MCS field that is used to indicate the MCS employed by the two transport blocks, where the two transport blocks use the same MCS. Preferably, the number of information bits of the MCS domain may be 5 bits, that is, the payload size of the MCS domain is 5 bits. At present, the DCI format 2A includes two MCS domains, and the number of information bits of each MCS domain is 5 bits, and the total number of information bits of all MCS domains is 10 bits. In the embodiment of the present invention, the number of information bits of the MCS domain included in the DCI is Less than the number of information bits of the MCS domain included in the DCI format 2A, the DCI overhead can be saved. This method is suitable for the case where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A/DCI format 1C.

For another example, the DCI may include two MCS domains, where the two MCS domains are a first MCS domain and a second MCS domain, where the first MCS domain is used to indicate that the transport block 1 (ie, the first transport block) is used. MCS, the second MCS field is used to indicate the MCS used by the transport block 2 (ie, the second transport block), and the number of information bits of the first MCS domain is the same as the number of information bits of the second MCS domain, for example, 5 bits, 4 bits, 3 bits or 2 bits, etc. This method is suitable for the case where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A.

For example, the DCI may include two MCS domains, where the two MCS domains are the first MCS domain and the second MCS domain, respectively, wherein the information bits of the second MCS domain are smaller than the information ratio of the first MCS domain. Special number. For example, when the number of information bits of the first MCS domain is 5, the number of information bits of the second MCS domain may be 1, 2, 3 or 4. Preferably, the first MCS field is used to indicate the MCS used by the transport block 1, and the second MCS field is used to indicate the MCS used by the transport block 2. The MCS used by the transport block 2 is determined by the value of the first MCS field. The values of the second MCS field are added together. Optionally, the first MCS field is used to indicate the MCS used by the transport block 2, the second MCS field is used to indicate the MCS used by the transport block 1, and the MCS used by the transport block 1 is determined by the value of the first MCS domain. Added to the value of the second MCS field. Exemplarily, when the value of the first MCS field is 5 and the value of the second MCS field is 2, it can be known that the MCS used by the transport block 1 is 5, and the MCS used by the transport block 2 is 7. Compared with the information bit number of the first MCS domain and the information bit number of the second MCS domain, the embodiment of the present invention can save the DCI overhead. This method is suitable for the case where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A.

In an optional embodiment, in order to support the large-latency cyclic delay diversity, before the network device sends the PDSCH to the at least one terminal device, the mapping of the transport block to the codeword may be configured according to a preset mapping relationship. The preset mapping relationship may be: when the PDSCH is transmitted by using two transport blocks, the transport block 1 corresponds to the codeword 0 and the transport block 2 corresponds to the codeword 1, or the transport block 2 corresponds to the codeword 0 and the transport block 1 corresponds to the codeword. 1. When the PDSCH is transmitted using the transport block 1, the transport block 1 corresponds to the codeword 0. When the PDSCH is transmitted using the transport block 2, the transport block 2 corresponds to the codeword 0. Therefore, the network device does not need to configure the DCI including the transport block to codeword swap flag domain, which can save DCI overhead. This method is suitable for the case where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A/DCI format 1C.

In an alternative embodiment, to support large delay cyclic delay diversity, the DCI may include a transport block to codeword exchange identification field, wherein the transport block to codeword exchange identification field is used to indicate a mapping relationship between the transport block and the codeword. The number of information bits in this field is 1. This method is suitable for the case where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A. Exemplarily, when the PDSCH is transmitted by using two transport blocks, the mapping relationship of the transport block to the codeword can be as shown in Table 1:

Table I

Bit value of the transport block to codeword exchange identifier Code word 0 Code word 1 0 Transport block 1 Transport block 2

1 Transport block 2 Transport block 1

When the bit value of the transport block to codeword exchange identifier is 0, transport block 1 corresponds to codeword 0 and transport block 2 corresponds to codeword 1. When the bit value of the transport block to codeword exchange identifier is 1, transport block 2 corresponds to codeword 0 and transport block 1 corresponds to codeword 1.

Exemplarily, when the PDSCH is transmitted by using one transport block, the mapping relationship of the transport block to the codeword can be as shown in Table 2:

Table II

Transport block 1 Transport block 2 Code word 0 Code word 1 use Do not use Transport block 1 - Do not use use Transport block 2 -

When the PDSCH is transmitted using the transport block 1, the transport block 1 corresponds to the codeword 0. When the PDSCH is transmitted using the transport block 2, the transport block 2 corresponds to the codeword 0.

In an optional embodiment, before the network device configures the DCI, the transmission scheme of the PDSCH may be configured as a large delay cyclic delay diversity, and the PDSCH transmission is configured to adopt two transmit antennas. The network device does not need to configure the DCI to include a precoding information (Precoding Information) field, and the embodiment of the present invention can save the DCI overhead. This method is suitable for the case where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A/DCI format 1C.

In an alternative embodiment, the DCI may include a precoding information field. The precoding information field is used to indicate the number of layers. In a specific implementation, when the transmission scheme of the PDSCH is a large delay cyclic delay diversity, and the number of the transmitting antennas configured by the network device is 2, the network device does not need to configure the DCI to include the precoding information domain. When the transmission scheme of the PDSCH is large delay cyclic delay diversity, and the number of transmission antennas configured by the network device is 4, the network device configuration DCI includes a precoding information field having the information bit number 2. This method is suitable for the case where the number of information bits of the DCI and the number of information bits of the DCI format 1A are the same.

In an optional embodiment, when the network device configures the downlink transmission mode of the PDSCH to be the transmission mode 3 (ie, the large delay cyclic delay diversity transmission mode), the DCI may include a transmission scheme identifier field, and the transmission scheme identifier field is used to identify the PDSCH. The transmission scheme is large delay cyclic delay diversity or transmit diversity. The number of information bits of the transmission scheme identification field is 1. When the value of the transmission scheme identifier field is 1, the PDSCH adopts a large delay cyclic delay diversity transmission scheme; when the value of the transmission scheme identifier field is 0, The PDSCH employs a transmit diversity transmission scheme. Or, when the value of the transmission scheme identifier field is 0, the PDSCH adopts a large delay cyclic delay diversity transmission scheme; when the value of the transmission scheme identifier field is 1, the PDSCH adopts a transmit diversity transmission scheme. This method is suitable for the case where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A/DCI format 1C.

It should be noted that when the transmission scheme identifier field indicates that the PDSCH adopts the transmit diversity transmission scheme, only one transport block is used. Preferably, transport block 1 is used when the transmission scheme identification field indicates that the PDSCH employs a transmit diversity transmission scheme. Preferably, when the transmission scheme identification field indicates that the PDSCH adopts a large delay cyclic delay diversity scheme, both the transport block 1 and the transport block 2 are used. Preferably, when the network device configuration DCI includes one MCS domain, and the MCS domain is used to indicate the MCS used by the two transport blocks, when the two transport blocks adopt the same MCS, the network device may configure the DCI to include the transmission scheme identifier field, and the transmission scheme The identification scheme is used to identify the transmission scheme of the PDSCH as large delay cyclic delay diversity or transmit diversity. Preferably, the network device configuration DCI includes a first MCS domain and a second MCS domain, where the first MCS domain is used to indicate the MCS used by the transport block 1, and the second MCS domain is used to indicate the MCS used by the transport block 2, When the number of information bits of the second MCS domain is less than the number of information bits of the first MCS domain, the network device may configure the DCI to include a transmission scheme identifier field, and the transmission scheme identifier field is used to identify the transmission scheme of the PDSCH as a large delay cyclic delay diversity or transmission. separation.

Preferably, the network device may define an identification field used to distinguish between DCI format 0 and DCI format 1A when transmitting unicast PDSCH as a transmission scheme identification field used to distinguish between large delay cyclic delay diversity and transmit diversity during multicast PDSCH transmission.

In an alternative embodiment, when the network device configures the PDSCH transmission to employ a transmit diversity transmission scheme, the PDSCH transmission can be configured to employ one codeword. When the network device configures PDSCH transmission to use large delay cyclic delay diversity, it can be configured to use two codewords for PDSCH transmission. That is, when the DCI configured by the network device indicates that the PDSCH transmission adopts one codeword or one transport block, it can be known that the PDSCH transmission adopts a transmit diversity transmission scheme; when the DCI configured by the network device indicates that the PDSCH transmission adopts two codewords or two When transporting blocks, it can be known that PDSCH transmission uses large delay cyclic delay diversity. It should be noted that when the network device is configured with four transmit antennas, not only the DCI needs to be configured to indicate that the PDSCH transmission adopts one codeword, but also the precoding information field needs to be configured to indicate that the PDSCH transmission adopts a transmit diversity transmission scheme.

Preferably, the network device configuration DCI includes a first MCS domain and a second MCS domain, where the first The MCS field is used to indicate the MCS used by the transport block 1. When the second MCS field is used to indicate the MCS used by the transport block 2, when the value of the first MCS field is 29, 30 or 31, the transport block 1 is not Use, when the value of the second MCS field is 29, 30 or 31, the transport block 2 is not used. This method is suitable for the case where the number of information bits of the DCI and the number of information bits of the DCI format 1A/DCI format 1C are the same.

In an alternative embodiment, the network device may configure the DCI such that the DCI may indicate that the PDSCH transmission is in a discontinuous resource block allocation manner. Because DCI format 1A/DCI format 1C includes a limited number of information bits, the DCI configured by the network device cannot directly adopt resource allocation modes 0 and 1.

其中，

为下行系统带宽。示例性的，P的取值可以如表三所示：For example, the DCI of the network device configuration may include a resource block allocation domain, the resource block allocation domain includes a bitmap, the bitmap is used to indicate the allocated at least one RBG, and one RBG is composed of Q consecutive LVRBs, where Q is greater than P. The integer, P = 1, 2, 3 or 4. The number of information bits of the resource block allocation domain may be:

among them,

For downstream system bandwidth. Exemplarily, the value of P can be as shown in Table 3:

Table 3

Downstream system bandwidth (RB) P ≤10 1 11–26 2 27–63 3 64–110 4

When the downlink system bandwidth is less than or equal to 10 RBs (resource blocks), the value of P is 1; when the downlink system bandwidth is greater than or equal to 11 RBs and less than or equal to 26 RBs, the value of P is 2; when the downlink system bandwidth is greater than or When the value is equal to 27 RB and less than or equal to 63 RB, the value of P is 3. When the downlink system bandwidth is greater than or equal to 64 RB and less than or equal to 110 RB, the value of P is 4.

It should be noted that, for the foregoing resource allocation manner, when the resource block allocation field indicates that one RBG is allocated, or when the resource block allocation field indicates that multiple consecutive RBGs are allocated, although the PDSCH transmission is continuous in the frequency domain. However, PDSCH transmission can still be regarded as a non-contiguous resource block allocation method.

示例性的，P的取值可以如上述表三所示。For another example, the DCI of the network device configuration may include a resource block allocation field, where the resource block allocation field is used to indicate one or more allocated LVRBs, and the one or more LVRBs are located in one RBG subset, and the one RBG subset is Q. One of the RBG subsets, where Q is an integer greater than P, P = 1, 2, 3, or 4. The number of information bits of the resource block allocation domain may be:

Exemplarily, the value of P can be as shown in Table 3 above.

It should be noted that, for the foregoing resource allocation mode, when the resource block allocation field indicates that one RBG is allocated, although the PDSCH transmission is continuous in the frequency domain, the PDSCH transmission can still be regarded as using the discontinuous resource block. Allocation.

示例性的，P的取值可以如上述表三所示。For another example, the DCI of the network device configuration may include a resource block allocation domain, where the resource block allocation domain is used to indicate two resource block sets, each resource block set includes one or more consecutive RBGs, and one RBG is composed of P consecutive LVRBs. , P is a positive integer. Preferably, P = 1, 2, 3 or 4. The number of information bits of the resource block allocation field can be:

Exemplarily, the value of P can be as shown in Table 3 above.

其中，

为确定的可用传输带宽。示例性的，网络设备配置的资源块分配域可以用于指示分配的LVRB，LVRB位于一个RBG子集中，RBG子集是P个RBG子集中的一个，P＝1、2、3或者4。该资源块分配域的信息比特数可以为：

其中，

为确定的可用传输带宽。For another example, before the network device configures the DCI, the available transmission bandwidth may be determined, where the available transmission bandwidth is smaller than the downlink system bandwidth, and then the DCI includes a resource block allocation domain, and the resource block indicated by the resource block allocation domain is located in the available transmission bandwidth. Exemplarily, the resource block allocation field of the network device configuration may include a bitmap, where the bitmap is used to indicate the allocated at least one resource block group RBG, and one RBG is composed of P consecutive LVRBs, P=1, 2, 3 or 4. The number of information bits of the resource block allocation domain may be:

among them,

To determine the available transmission bandwidth. Exemplarily, the resource block allocation field of the network device configuration may be used to indicate the allocated LVRB, the LVRB is located in one RBG subset, and the RBG subset is one of the P RBG subsets, P=1, 2, 3 or 4. The number of information bits of the resource block allocation domain may be:

among them,

To determine the available transmission bandwidth.

Further optionally, before the network device configures the DCI, the available transmission bandwidth of the SC-PTM transmission may be configured. For example, the network device may send the first signaling to the at least one terminal device, the first signaling including information indicating an available transmission bandwidth of the SC-PTM transmission, the first signaling being high layer signaling or physical layer signaling. High Layer Signaling is signaling from a higher layer and with a slower transmission frequency, such as radio resource control (Radio Resource). Control, RRC) signaling or Media Access Control (MAC) signaling.

It should be noted that, in order to flexibly switch between the continuous RB allocation mode and the non-contiguous RB allocation mode, the DCI configured by the network device may include a resource allocation mode identifier field, and the resource allocation mode identifier field is used to identify the resource allocation mode as a continuous resource block allocation or non- Continuous resource block allocation. Preferably, the number of information bits of the resource allocation mode identifier field is 1.

Further, after the network device is configured with the DCI, a Cyclic Redundancy Check (CRC) may be generated, and the CRC is scrambled by using a Group Radio Network Temporary Identifier (G-RNTI). The CRC is used for error detection of the DCI. Optionally, before the network device uses the G-RNTI to scramble the CRC, the G-RNTI may be configured, and the second signaling is sent to the at least one terminal device, where the second signaling includes information indicating the G-RNTI, where the The second signaling is high layer signaling or physical layer signaling.

In an optional embodiment, the downlink transmission mode may be configured before the network device configures the DCI. Optionally, for different services, the network device can configure different downlink transmission modes. Optionally, for the same terminal device, the network device configures the multicast downlink mode and the unicast PDSCH transmission to adopt the same downlink transmission mode. For example, for the same terminal device, the network device configures the multicast transmission mode and the unicast PDSCH transmission to use the same transmission mode 3. Further, the network device may send third signaling to the at least one terminal device, where the third signaling includes information for indicating a downlink transmission mode. The third signaling may be high layer signaling or physical layer signaling. Exemplarily, the downlink transmission mode can be as shown in Table 4:

Table 4

Downlink transmission mode PDSCH transmission scheme Transmission mode 1 Single antenna port, port 0 Transmission mode 2 Transmit diversity Transmission mode 3 Large delay cyclic delay diversity or transmit diversity

When the downlink transmission mode is the transmission mode 1 (ie, the single antenna port transmission mode), the PDSCH transmission scheme may be a single antenna port; when the downlink transmission mode is the transmission mode 2 (ie, the transmit diversity transmission mode), the PDSCH transmission scheme may be a transmission. Diversity; when the downlink transmission mode is transmission mode 3 (ie, large delay cyclic delay diversity transmission mode), the PDSCH transmission scheme may be a large delay cyclic delay. Diversity or transmit diversity.

Optionally, the network device determines the downlink transmission mode according to the number of physical broadcast channel (PBCH) antenna ports. When the number of PBCH antenna ports is 1, the network device determines that the downlink transmission mode is the transmission mode 1; when the number of PBCH antenna ports is greater than 1, the network device determines that the downlink transmission mode is the transmission mode 2 or 3. Further, the network device may send signaling to the at least one terminal device, where the signaling is used to indicate that the downlink transmission mode is the transmission mode 2 or 3. The signaling can be high layer signaling or physical layer signaling.

Optionally, the network device determines the transmission scheme according to the number of PBCH antenna ports. When the number of PBCH antenna ports is 1, the network device determines that the downlink transmission scheme is single antenna port transmission; when the number of PBCH antenna ports is greater than 1, the network device determines that the downlink transmission scheme is large delay cyclic delay diversity or transmit diversity. Further, the network device may send signaling to the at least one terminal device, where the signaling is used to indicate that the downlink transmission scheme is large delay cyclic delay diversity or transmit diversity. The signaling can be high layer signaling or physical layer signaling.

S102. The network device sends the DCI to the at least one terminal device.

The network device can transmit the configured DCI to at least one terminal device. In a specific implementation, after the network device is configured with the DCI, the DCI carried by the PDCCH may be sent to the at least one terminal device, where the PDCCH may be a PDCCH defined by the version (Rel)-8 or an enhanced physical downlink control channel defined by the Rel-11. (Enhanced Physical Downlink Control CHannnel, ePDCCH), which may also be a future evolved PDCCH, which is not specifically limited by the embodiment of the present invention. Preferably, the DCI can be located in the CSS. This eliminates the need to add new search space and thus does not increase the number of blind detections of the terminal device. Alternatively, the DCI may be located in a CSS or a Group Search Space (GSS).

的CCE，其中，k为当前子帧号。具体地，组成CSS的CCE的编号可以为： In an alternative embodiment, the search space may be configured before the network device sends the DCI to the at least one terminal device. For example, a network device can configure CSS. Among them, CSS is a CSS defined by the traditional LTE system. The network device may be configured to be composed of the first 16 CCEs in the downlink control region, and include four candidate PDCCHs with a CCE aggregation level of 4 and two candidate PDCCHs with a CCE aggregation level of 8. Since the search space is a candidate PDCCH set, the PDCCH is aggregated by the CCE. Therefore, to determine the search space with the aggregation level of L, it is necessary to determine the constituent search space.

CCE, where k is the current subframe number. Specifically, the number of the CCE constituting the CSS may be:

为聚合级别为L时，CSS中候选PDCCH个数。N_CCE,k为子帧k上的CCE总数。另外，下行控制区域包括N_CCk个CCE，从0依次编号到N_CCk-1，其中，每个CCE都有一个标识自己在下行控制区域中的位置的编号，需要说明的是，编号也可以称为序号，索引等。Where i=0,...,L-1,

The number of candidate PDCCHs in the CSS when the aggregation level is L. N _CCE,k is the total number of CCEs on subframe k. In addition, the downlink control area includes N _CCk CCEs, which are sequentially numbered from 0 to N _CCk -1, wherein each CCE has a number that identifies its position in the downlink control area, and it should be noted that the number may also be called For serial numbers, indexes, etc.

个CCE聚合级为4的候选PDCCH和

个CCE聚合级为8的候选PDCCH。For another example, the network device may be configured with a GSS, where the GSS is composed of N CCEs other than the first 16 CCEs in the control region, and N is a positive integer greater than 1. Preferably, including

Candidate PDCCHs with a CCE aggregation level of 4

A candidate PDCCH with a CCE aggregation level of 8.

Further optionally, the network device is configured to continuously distribute GSS and CSS. Preferably, the number of the CCE constituting the GSS may be:

为聚合级别为L时，GSS中候选PDCCH个数。

为聚合级别为L时，CSS中候选PDCCH的数量。N_CCE,k为子帧k上的CCE总数，L为4或者8。Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L.

The number of candidate PDCCHs in the CSS when the aggregation level is L. N _CCE,k is the total number of CCEs in subframe k, and L is 4 or 8.

Further optionally, the network device configures the GSS and the CSS to be discontinuously distributed. Preferably, the number of the CCE constituting the GSS may be:

Where n is a positive integer.

Further optionally, the network device determines the GSS according to the G-RNTI. Preferably, the number of the CCE constituting the GSS may be:

Y_k＝(A·Y_k-1)mod D，Y_-1＝n_RNTI≠0，A＝39827,D＝65537，

n_s为一个无线帧的时隙(slot)序号，n_RNTI为G-RNTI值。或者，其中Y_-1＝F(n_RNTI,n)≠0，F(k)表示某种函数。优选地，L为4或8。 Where i=0,...,L-1,

Y _k =(A·Y _k-1 )mod D, Y _-1 =n _RNTI ≠0, A=39827, D=65537,

n _s is the slot number of one radio frame, and n _RNTI is the G-RNTI value. Or, where Y _-1 = F(n _RNTI , n) ≠ 0, F(k) represents a certain function. Preferably, L is 4 or 8.

Further, after the network device is configured with the GSS, the terminal device needs to monitor the CSS, the UESS, and the GSS, and the number of blind detections on the PDCCH is increased. To ensure that the maximum number of PDCCH blind detections is constant or the number of blind detections is reduced, the network device may configure a first subframe set and configure GSS on the first subframe set. The subframe in the first subframe set satisfies (10×n _f +n _sbf −n _OFFSET ) mod M=0. n _f denotes a system frame number SFN, n _sbf denotes a subframe number, and n _OFFSET denotes an offset subframe number.

When multiple subframe offsets are configured in the configuration information, it indicates that the first subframe set includes multiple downlink subframes/special subframes in one allocation period.

Further, for the terminal device that needs to receive the multicast data that is carried on the PDSCH, the network device does not configure the UESS of the terminal device on the first subframe set, that is, the terminal device only needs to be on the non-first subframe set. The subframe detects the UESS. The embodiment of the invention can ensure that the maximum number of PDCCH blind detections is constant or the number of blind detections is reduced.

Further optionally, the network device can be configured with sUESS, where sUESS is smaller than UESS. For a terminal device that needs to receive multicast data carried on the PDSCH, the terminal device only needs to detect the sUESS, and does not need to detect the UESS. The embodiment of the invention can ensure that the maximum number of PDCCH blind detections is constant or the number of blind detections is reduced.

S103. The network device sends the PDSCH to the at least one terminal device.

After the network device sends the DCI to the at least one terminal device, the PDSCH may be sent to each of the foregoing terminal devices. In a specific implementation, the network device may send data that is carried on the PDSCH to at least one terminal device. Preferably, the data carried on the PDSCH is multicast data, and the PDSCH may be referred to as a multicast PDSCH. Optionally, the data carried in the PDSCH may be multicast data, broadcast data, or unicast data, etc., and is not specifically limited by the embodiment of the present invention.

In the method for transmitting control information shown in FIG. 1, the network device configures DCI, where DCI is used to schedule PDSCH transmission, the number of information bits of DCI is the same as the number of information bits of DCI format 1A, and PDSCH transmission uses large delay cyclic delay diversity. a transmission mode and/or a discontinuous resource block allocation manner, transmitting DCI to at least one terminal device, transmitting a PDSCH to at least one terminal device, and adopting a large delay cyclic delay diversity transmission mode or a discontinuous resource block allocation in the SC-PTM transmission the way.

Referring to FIG. 2, FIG. 2 is a method for transmitting control information according to a second embodiment of the present invention. The flow of the control information in the embodiment of the present invention may include:

S201: The network device configures the DCI, and determines a search space, where the DCI is used to schedule PDSCH transmission.

It should be noted that the network device configures the DCI and determines that the search space has no clear timing relationship, and the two can be executed simultaneously, or the DCI is first configured to determine the search space, or the search space is first configured to reconfigure the DCI.

In a specific implementation, the network device configures the DCI. The format of the DCI may be DCI format 1A, DCI format 1 or DCI format 2A. When the downlink transmission mode is the transmission mode 1 or the transmission mode 2, the DCI configured by the network device may be DCI format 1A or DCI format 1. When the downlink transmission mode is the transmission mode 3, the DCI configured by the network device may be DCI format 1A or DCI format 2A.

Optionally, the network device configures the DCI. The format of the DCI may be DCI format 1A, DCI format 1C, DCI format 1 or DCI format 2A. When the downlink transmission mode is the transmission mode 1 or the transmission mode 2, the DCI configured by the network device may be DCI format 1A, DCI format 1C, or DCI format 1. When the downlink transmission mode is the transmission mode 3, the DCI configured by the network device may be DCI format 1A, DCI format 1C or DCI format 2A.

In a specific implementation, the network device determines a search space, where the search space is a search space that carries the DCI, that is, the DCI is located in the search space.

的CCE，其中，k为当前子帧号。具体地，组成CSS的CCE的编号可以为：Preferably, the search space is CSS and/or GSS. Among them, CSS is a CSS defined by the traditional LTE system. The network device may be configured to be composed of the first 16 CCEs in the downlink control region, and include four candidate PDCCHs with a CCE aggregation level of 4 and two candidate PDCCHs with a CCE aggregation level of 8. Since the search space is a candidate PDCCH set, the PDCCH is aggregated by the CCE. Therefore, to determine the search space with the aggregation level of L, it is necessary to determine the constituent search space.

CCE, where k is the current subframe number. Specifically, the number of the CCE constituting the CSS may be:

为聚合级别为L时，CSS中候选PDCCH个数。N_CCE,k为子帧k上的CCE总数。Where i=0,...,L-1,

The number of candidate PDCCHs in the CSS when the aggregation level is L. N _CCE,k is the total number of CCEs on subframe k.

个CCE聚合级为4的候选PDCCH和

个CCE聚合级为8的候选PDCCH。For another example, the network device may configure a group search space (GSS), where the GSS is composed of N CCEs other than the first 16 CCEs in the control region, and N is a positive integer greater than 1. Preferably, including

Candidate PDCCHs with a CCE aggregation level of 4

A candidate PDCCH with a CCE aggregation level of 8.

In an alternative embodiment, the network device configures the GSS and CSS to be continuously distributed. Preferably, the number of the CCE constituting the GSS may be:

为聚合级别为L时，GSS中候选PDCCH个数。

为聚合级别为L时，CSS中候选PDCCH的数量。N_CCE,k为子帧k上的CCE总数，L为4或者8。Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L.

The number of candidate PDCCHs in the CSS when the aggregation level is L. N _CCE,k is the total number of CCEs in subframe k, and L is 4 or 8.

In an alternative embodiment, the network device configures the GSS and CSS to be non-continuously distributed. Preferably, the number of the CCE constituting the GSS may be:

Where n is a positive integer.

In an alternative embodiment, the network device determines the GSS based on the G-RNTI. Preferably, the number of the CCE constituting the GSS may be:

Y_k＝(A·Y_k-1)mod D，Y_-1＝n_RNTI≠0，A＝39827，D＝65537，

n_s为一个无线帧的时隙(slot)序号，n_RNTI为G-RNTI值。或者，其中Y_-1＝F(n_RNTI,n)≠0，F(k)表示某种函数。优选地，L为4或8。Where i=0,...,L-1,

Y _k =(A·Y _k-1 )mod D, Y _-1 =n _RNTI ≠0, A=39827, D=65537,

n _s is the slot number of one radio frame, and n _RNTI is the G-RNTI value. Or, where Y _-1 = F(n _RNTI , n) ≠ 0, F(k) represents a certain function. Preferably, L is 4 or 8.

In an optional embodiment, after the network device configures the GSS, the terminal device needs to monitor the CSS, UESS, and GSS, and the number of blind detections for the PDCCH is increased. To ensure that the maximum number of PDCCH blind detections is constant or the number of blind detections is reduced, the network device may configure a first subframe set and configure GSS on the first subframe set. The subframe in the first subframe set satisfies (10×n _f +n _sbf −n _OFFSET ) mod M=0. n _f denotes a system frame number SFN, n _sbf denotes a subframe number, and n _OFFSET denotes an offset subframe number.

When multiple subframe offsets are configured in the configuration information, it indicates that the first subframe set includes multiple downlink subframes/special subframes in one allocation period.

In an optional embodiment, for the terminal device that needs to receive the multicast data that is carried on the PDSCH, the network device does not configure the UESS of the terminal device on the first subframe set, that is, the terminal device only needs to be in the non-first subframe. The subframe on the set detects the UESS. The embodiment of the invention can ensure that the maximum number of PDCCH blind detections is constant or the number of blind detections is reduced.

In an alternative embodiment, the network device can configure sUESS, where sUESS is less than UESS. For a terminal device that needs to receive multicast data carried on the PDSCH, the terminal device only needs to detect the sUESS, and does not need to detect the UESS. The embodiment of the invention can ensure that the maximum number of PDCCH blind detections is constant or the number of blind detections is reduced.

In an alternative embodiment, the network device may configure the DCI and determine the search space according to the first relationship, the first relationship being a relationship between the search space, the DCI, and the PDSCH transmission scheme.

Further, the first relationship may include: when the format of the DCI is DCI format 1A, the search space is CSS and GSS; when the format of the DCI is DCI format 1 or DCI format 2A, the search space is GSS. Exemplarily, the first relationship can be as shown in Table 5. In this way, the network device configures the DCI and determines the search space according to Table 5.

Table 5

Further, the first relationship may include: when the DCI is DCI format 1A, the search space is CSS; when the DCI is DCI format 1 or DCI format 2A, the search space is GSS. Compared with the foregoing manner of determining the search space, the number of blind detections of the PDCCH in the embodiment of the present invention is small. Exemplarily, the first relationship may be as shown in Table 6. The network device configures the DCI according to Table 6 and determines the search space. between.

Table 6

Further, the first relationship may include: when the format of the DCI is DCI format 1A or DCI format 1C, the search space is CSS and GSS; when the format of the DCI is DCI format 1 or DCI format 2A, the search space is GSS. . Exemplarily, the first relationship can be as shown in Table 7. In this way, the network device configures the DCI and determines the search space according to Table 7.

Table 7

Further, the first relationship may include: when the DCI is DCI format 1A or DCI format 1C, the search space is CSS; when the DCI is DCI format 1 or DCI format 2A, the search space is GSS. Compared with the foregoing manner of determining the search space, the number of blind detections of the PDCCH in the embodiment of the present invention is small. Exemplarily, the first relationship can be as shown in Table 8. In this way, the network device configures the DCI and determines the search space according to Table 8.

Table eight

Optionally, the first relationship includes: for the transmission mode 1 or the transmission mode 2, when the DCI is DCI format 1A or DCI format 1, the search space is CSS; for the transmission mode 3, when the DCI is DCI format 1A or DCI format 2A When the search space is CSS. Compared with the manner of determining the above search space, the embodiment of the present invention does not need to increase the GSS. Exemplarily, the first relationship can be as shown in Table 9. In this way, the net The network device configures the DCI and determines the search space according to Table 9.

Table 9

Further, the first relationship may include: for the transmission mode 1 or the transmission mode 2, when the DCI is DCI format 1A, DCI format 1 or DCI format 1C, the search space is CSS; for the transmission mode 3, when the DCI is DCI In format 1A, DCI format 2A or DCI format 1C, the search space is CSS. Compared with the manner of determining the above search space, the embodiment of the present invention does not need to increase the GSS. Exemplarily, the first relationship can be as shown in Table 10. In this way, the network device configures the DCI and determines the search space according to Table 10.

Table ten

In an alternative embodiment, after the network device configures the DCI, a CRC may be generated and the CRC is scrambled with a G-RNTI for error detection of the DCI. Optionally, before the network device uses the G-RNTI to scramble the CRC, the G-RNTI may be configured, and the second signaling is sent to the at least one terminal device, where the second signaling includes information indicating the G-RNTI, where the The second signaling is high layer signaling or physical layer signaling.

In an optional embodiment, the downlink transmission mode may be configured before the network device configures the DCI. Optionally, for different services, the network device can configure different downlink transmission modes. Optionally, for the same terminal device, the network device configures the multicast downlink mode and the unicast PDSCH transmission to adopt the same downlink transmission mode. For example, for the same terminal device, the network device configures the multicast transmission mode and the unicast PDSCH transmission to use the same transmission mode 3. Further, the network device may send third signaling to the at least one terminal device, where the third signaling includes information for indicating a downlink transmission mode. The third signaling may be high layer signaling or physical layer signaling. Exemplarily, the downlink transmission mode can be as shown in Table 4 above.

Optionally, the network device determines the downlink transmission mode according to the number of physical broadcast channel antenna ports. When the number of PBCH antenna ports is 1, the network device determines that the downlink transmission mode is the transmission mode 1; when the number of PBCH antenna ports is greater than 1, the network device determines that the downlink transmission mode is the transmission mode 2 or 3. Further, the network device may send signaling to the at least one terminal device, where the signaling is used to indicate that the downlink transmission mode is the transmission mode 2 or 3. The signaling can be high layer signaling or physical layer signaling.

Optionally, the network device determines the transmission scheme according to the number of PBCH antenna ports. When the number of PBCH antenna ports is 1, the network device determines that the downlink transmission scheme is single antenna port transmission; when the number of PBCH antenna ports is greater than 1, the network device determines that the downlink transmission scheme is large delay cyclic delay diversity or transmit diversity. Further, the network device may send signaling to the at least one terminal device, where the signaling is used to indicate that the downlink transmission scheme is large delay cyclic delay diversity or transmit diversity. The signaling can be high layer signaling or physical layer signaling.

S202. The network device sends a DCI to the at least one terminal device, where the PDCCH carrying the DCI is one candidate PDCCH in the determined search space.

S203. The network device sends the PDSCH to the at least one terminal device.

In the method for transmitting control information shown in FIG. 2, the network device configures the DCI, and determines a search space, and sends a PDCCH carrying DCI to at least one terminal device, where the PDCCH is a candidate PDCCH in the determined search space, and further A terminal device sends a PDSCH. Since a GSS is newly defined for DCI or DCS with a bearer format of DCI format 2A or DCI format 1, DCI can be used to carry DCI format 2A or DCI format 1, so large delay can be used in SC-PTM transmission. Cyclic delay diversity transmission mode or discontinuous resource block allocation mode.

Referring to FIG. 3, FIG. 3 is a schematic flowchart of a method for transmitting control information according to a third embodiment of the present invention. The method for transmitting control information in the embodiment of the present invention may include:

S301. The terminal device receives the DCI sent by the network device, where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A.

The terminal device can receive the DCI sent by the network device, and the DCI is used to schedule the PDSCH transmission. Preferably, the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A. Optionally, the number of information bits of the DCI may be the same as the number of information bits of the DCI format 1C, and the DCI format 1C is used for very tight scheduling of a PDSCH codeword. Optionally, the number of information bits of the DCI may be the same as the number of information bits of the DCI format 1A/DCI format 1C, and the PDSCH transmission adopts a closed loop space division multiplexing scheme and/or a discontinuous resource block allocation manner. The number of information bits of the DCI is the same as the number of information bits of the DCI format 1A/DCI format 1C, which can prevent the terminal device from increasing the number of PDCCH blind detections in the CSS. Preferably, the DCI can be located in the CSS. This eliminates the need to add new search space and thus does not increase the number of blind detections of the terminal device. Alternatively, the DCI can be located in CSS or GSS.

In an alternative embodiment, the terminal device may determine a search space, where the search space is CSS and/or GSS.

的CCE，其中，k为当前子帧号。具体地，终端设备可以确定组成CSS的CCE的编号可以为：The CSS is composed of the first 16 CCEs in the downlink control region, and includes four candidate PDCCHs with a CCE aggregation level of 4 and two candidate PDCCHs with a CCE aggregation level of 8. Further, since the search space is a candidate PDCCH set, and the PDCCH is aggregated by the CCE, to determine the search space with the aggregation level L, it is necessary to determine the constituent search space.

CCE, where k is the current subframe number. Specifically, the terminal device may determine that the number of the CCE constituting the CSS may be:

为聚合级别为L时，CSS中候选PDCCH个数。N_CCE,k为子帧k上的CCE总数。Where i=0,...,L-1,

The number of candidate PDCCHs in the CSS when the aggregation level is L. N _CCE,k is the total number of CCEs on subframe k.

个CCE聚合级为4的候选PDCCH和

个CCE聚合级为8的候选PDCCH。The GSS is composed of N CCEs other than the first 16 CCEs in the downlink control region, and N is a positive integer greater than 1. Preferably, the GSS can comprise

Candidate PDCCHs with a CCE aggregation level of 4

A candidate PDCCH with a CCE aggregation level of 8.

Further optionally, when the GSS and the CSS are continuously distributed, the terminal device may determine that the number of the CCE included in the GSS may be:

为聚合级别为L时，GSS中候选PDCCH的数量，

为聚合级别为L时，CSS中候选PDCCH的数量，N_CCE,k为子帧k上的CCE的数量，L为4或8。Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L,

When the aggregation level is L, the number of candidate PDCCHs in the CSS, N _CCE,k is the number of CCEs on the subframe k, and L is 4 or 8.

Further optionally, the GSS and CSS are non-continuously distributed. Preferably, the number of the CCE constituting the GSS may be:

Where n is a positive integer.

In an optional embodiment, the terminal device may determine, according to the G-NRT1, that the number of the CCE included in the GSS may be:

Y_k＝(A·Y_k-1)mod D，Y_-1＝n_RNT1≠0，A＝39827，D＝65537，

n_s为一个无线帧的时隙序号，n_RNT1为G-NRT1值。或者，其中Y_-1＝F(n_RNTI,n)≠0，F(k)表示某种函数。优选地，L为4或8。 Where i=0,...,L-1,

Y _k =(A·Y _k-1 )mod D, Y _-1 =n _RNT1 ≠0, A=39827, D=65537,

n _s is the slot number of one radio frame, and n _RNT1 is the G-NRT1 value. Or, where Y _-1 = F(n _RNTI , n) ≠ 0, F(k) represents a certain function. Preferably, L is 4 or 8.

Further optionally, the terminal device may detect the GSS on the first subframe set, where the subframe in the first subframe set satisfies (10×n _f +n _sbf −n _OFFSET ) modM=0, and n _f represents a system frame. Number, n _sbf represents the subframe number, and n _OFFSET represents the offset subframe number.

When multiple subframe offsets are configured in the configuration information, it indicates that the first subframe set includes multiple downlink subframes/special subframes in one allocation period.

Further optionally, when the UESS of the terminal device is not configured on the first subframe set, the terminal device only needs to detect the UESS in a subframe that is not on the first subframe set. The embodiment of the invention can ensure that the maximum number of PDCCH blind detections is constant or the number of blind detections is reduced.

Further optionally, the terminal device can detect the sUESS without detecting the UESS, where the sUESS is smaller than the UESS. The embodiment of the invention can ensure that the maximum number of PDCCH blind detections is constant or the number of blind detections is reduced.

In an optional embodiment, before the terminal device receives the DCI sent by the network device, the downlink transmission mode may be determined. Further, the terminal device may receive the third signaling sent by the network device, where the third signaling includes information for indicating a downlink transmission mode, and further determines a downlink transmission mode according to the third signaling. Optionally, the multicast PDSCH transmission and the unicast PDSCH transmission adopt the same downlink transmission mode. Therefore, the terminal device may determine that the downlink transmission mode is a downlink transmission mode adopted by the unicast PDSCH transmission.

Optionally, the terminal device determines the transmission mode according to the number of PBCH antenna ports. When the number of PBCH antenna ports is 1, the terminal device determines that the downlink transmission mode is the transmission mode 1; when the number of PBCH antenna ports is greater than 1, the terminal device determines that the downlink transmission mode is the transmission mode 2 or 3. Further, the terminal device may receive signaling sent by the network device, where the signaling is used to indicate that the downlink transmission mode is the transmission mode 2 or 3. The signaling can be high layer signaling or physical layer signaling.

Optionally, the terminal device determines the transmission scheme according to the number of PBCH antenna ports. When the number of PBCH antenna ports is 1, the terminal device determines that the downlink transmission scheme is single antenna port transmission; when the number of PBCH antenna ports is greater than 1, the terminal device determines that the downlink transmission scheme is large delay cyclic delay diversity or transmit diversity. Further, the terminal device may receive signaling sent by the network device, where the signaling is used to indicate that the downlink transmission scheme is large delay cyclic delay diversity or transmit diversity. The signaling can be high layer signaling or physical layer signaling.

Optionally, before receiving the DCI sent by the network device, the method further includes: receiving, sending, by the network device Signaling, the signaling includes information indicating a G-RNTI, which is high layer signaling or physical layer signaling, the G-RNTI is used to scramble the CRC, and the CRC is used for error detection of the DCI. Then, the terminal device blindly detects the candidate PDCCH in the search space according to the information bit number of the DCI, and uses the G-RNTI to descramble the CRC of the candidate PDCCH, and then performs CRC check. The candidate PDCCH with the correct CRC check is the PDCCH carrying the DCI.

S302. The terminal device acquires scheduling information for the PDSCH transmission from the DCI, where the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation manner.

The terminal device may acquire scheduling information for PDSCH transmission from the DCI, where the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation manner.

In an optional embodiment, when the DCI includes an MCS domain, the terminal device may determine that the MCS used by the two transport blocks is the value of the MCS domain, where the two transport blocks adopt the same MCS. This MCS field is used to indicate the MCS used by the two transport blocks. Preferably, the number of information bits of the MCS domain may be 5 bits, that is, the load size of the MCS domain is 5 bits.

In an optional embodiment, when the DCI includes the first MCS domain and the second MCS domain, the terminal device may determine that the MCS used by the transport block 1 is the value of the first MCS domain, and the MCS used by the transport block 2 is the first. The value of the second MCS field, where the number of information bits of the first MCS field is the same as the number of information bits of the second MCS field, for example, 5 bits, 4 bits, 3 bits, or 2 bits.

In an optional embodiment, when the DCI includes the first MCS domain and the second MCS domain, the number of information bits of the second MCS domain is less than the number of information bits of the first MCS domain. Preferably, the terminal device may determine that the MCS used by the transport block 1 is the value of the first MCS domain, and the MCS used by the transport block 2 is obtained by adding the value of the first MCS domain to the value of the second MCS domain. of. Optionally, the terminal device may determine that the first MCS domain is used to indicate the MCS used by the transport block 2, the second MCS domain is used to indicate the MCS used by the transport block 1, and the MCS used by the transport block 1 passes the first MCS. The value of the field is added to the value of the second MCS field.

In an optional embodiment, when the DCI includes a transport block to a codeword exchange identifier field, the terminal device may determine a mapping relationship between the transport block and the codeword according to the transport block to codeword exchange identifier field. For example, the PDSCH uses two transport block transmissions. When the bit value of the transport block to codeword exchange identifier is 0, the terminal device can determine that transport block 1 corresponds to codeword 0 and transport block 2 corresponds to codeword 1. When the bit value of the transport block to codeword exchange identifier is 1, the terminal device may determine that the transport block 2 corresponds to the codeword 0 and the transport block 1 corresponds to the codeword. 1. For another example, the PDSCH uses a transport block transmission. When the PDSCH is transmitted using the transport block 1, the terminal device can determine that the transport block 1 corresponds to the codeword 0. When the PDSCH is transmitted using the transport block 2, the terminal device can determine that the transport block 2 corresponds to the codeword 0.

In an optional embodiment, the terminal device may determine a mapping of the transport block to the codeword according to the preset mapping relationship. The preset mapping relationship may be: when the PDSCH is transmitted by using two transport blocks, the transport block 1 corresponds to the codeword 0 and the transport block 2 corresponds to the codeword 1, or the transport block 2 corresponds to the codeword 0 and the transport block 1 corresponds to the codeword. 1. When the PDSCH is transmitted using the transport block 1, the transport block 1 corresponds to the codeword 0. When the PDSCH is transmitted using the transport block 2, the transport block 2 corresponds to the codeword 0.

In an optional embodiment, when the DCI includes a precoding information field, the terminal device may determine the number of layers according to the precoding information field. For example, when the transmission scheme of the PDSCH is large delay cyclic delay diversity, and the number of transmit antennas is 4, the DCI includes a 2-bit precoding information field.

In an alternative embodiment, when the DCI does not include the precoding information field, the terminal device may determine that if the transmission scheme of the PDSCH is large delay cyclic delay diversity, the number of transmitting antennas is two.

In an optional embodiment, when the DCI includes the transmission scheme identifier field, the terminal device may determine, according to the transmission scheme identifier field, that the transmission scheme of the PDSCH is large delay cyclic delay diversity or transmit diversity. For example, when the value of the transmission scheme identifier field is 1, the terminal device may determine that the PDSCH adopts a large delay cyclic delay diversity transmission scheme; when the value of the transmission scheme identifier field is 0, the terminal device may determine that the PDSCH uses the transmit diversity transmission. Program. Alternatively, when the value of the transmission scheme identifier field is 0, the terminal device may determine that the PDSCH adopts a large delay cyclic delay diversity transmission scheme; when the value of the transmission scheme identifier field is 1, the terminal device may determine that the PDSCH uses the transmit diversity transmission. Program. Optionally, when the PDSCH transmission adopts a transmit diversity transmission scheme, the terminal device determines that the PDSCH transmission adopts one transport block. When the PDSCH transmission employs large delay cyclic delay diversity, the terminal device determines that the PDSCH transmission uses two transport blocks.

In an optional embodiment, when the DCI does not include the transmission scheme identifier field, the terminal device may determine, according to the number of transmission blocks used in the PDSCH transmission, that the transmission scheme of the PDSCH is large delay cyclic delay diversity or transmit diversity. When the PDSCH transmission employs one transport block, the terminal device determines that the PDSCH transmission employs a transmit diversity transmission scheme. When the PDSCH transmission employs two transport blocks, the terminal device determines that the PDSCH transmission employs large delay cyclic delay diversity. Preferably, the DCI includes a first MCS domain and a second MCS domain, where the first MCS domain is used to indicate the MCS used by the transport block 1, and the second MCS When the field is used to indicate the MCS used by the transport block 2, when the value of the first MCS field is 29, 30, or 31, the transport block 1 is not used, and when the value of the second MCS field is 29, 30, or 31. When the transport block 2 is not used.

In an optional embodiment, when the DCI includes a resource block allocation domain, the resource block allocation domain includes a bitmap, and the terminal device may determine the allocated at least one RBG according to the bitmap, where one RBG is composed of Q consecutive LVRBs, where , Q is an integer greater than P, P = 1, 2, 3 or 4. Exemplarily, the value of P can be as shown in Table 3 above.

In an optional embodiment, when the DCI includes a resource block allocation domain, the terminal device may determine one or more allocated LVRBs according to the resource block allocation domain, where one or more LVRBs are located in one RBG subset, and the RBG subset is Q. One of the RBG subsets, where Q is an integer greater than P, P = 1, 2, 3, or 4. Exemplarily, the value of P can be as shown in Table 3 above.

In an optional embodiment, when the DCI includes a resource block allocation domain, the terminal device may determine two resource block sets according to the resource block allocation domain, where each resource block set includes one or more consecutive RBGs, and one RBG consists of P consecutive The composition of LVRB, P is a positive integer, preferably, P = 1, 2, 3 or 4. Exemplarily, the value of P can be as shown in Table 3 above.

In an optional embodiment, when the DCI includes the resource block allocation domain, the terminal device may determine an available transmission bandwidth, where the available transmission bandwidth is smaller than the downlink system bandwidth, and then determine the allocated at least one resource block according to the resource block allocation domain, where the allocated At least one resource block is located within the available transmission bandwidth. Exemplarily, the resource block allocation field includes a bitmap, and the terminal device may determine the allocated at least one resource block group RBG according to the bitmap, where one RBG is composed of P consecutive LVRBs, P=1, 2, 3 or 4. Exemplarily, the terminal device may determine that the resource block allocation field is used to indicate the allocated LVRB, the LVRB is located in one RBG subset, and the RBG subset is one of the P RBG subsets, P=1, 2, 3, or 4.

Further optionally, the terminal device may receive the first signaling sent by the network device, where the first signaling includes information indicating an available transmission bandwidth of the SC-PTM transmission, and further determines an available transmission bandwidth according to the first signaling.

In an optional embodiment, when the DCI includes the resource allocation manner identifier field, the resource allocation manner may be determined according to the resource allocation manner identifier field as a continuous resource block allocation (eg, resource allocation mode 2) or a non-contiguous resource block allocation. Preferably, the number of information bits of the resource allocation mode identifier field is 1.

S303. The terminal device receives the PDSCH sent by the network device according to the scheduling information.

The terminal device may receive the PDSCH sent by the network device according to the scheduling information. In a specific implementation, the terminal device may receive data that is sent by the network device and is carried by the PDSCH. Optionally, the data carried on the PDSCH may be multicast data, broadcast data, or unicast data.

In the method for transmitting control information shown in FIG. 3, the terminal device receives the DCI sent by the network device, and the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the scheduling information for the PDSCH transmission is obtained from the DCI, the PDSCH. The transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation mode, and receives the PDSCH transmitted by the network device according to the scheduling information, and may receive the PDSCH by using a large delay cyclic delay diversity transmission mode or a discontinuous resource block allocation manner.

Referring to FIG. 4, FIG. 4 is a schematic flowchart of a method for transmitting control information according to a fourth embodiment of the present invention. The method for transmitting control information in the embodiment of the present invention may include:

S401. The terminal device determines a search space.

The terminal device can determine a search space, which is a search space that carries the DCI, that is, the DCI is located in the search space.

的CCE，其中，k为当前子帧号。具体地，组成CSS的CCE的编号可以为：Preferably, the search space is CSS and/or GSS. Among them, CSS is a CSS defined by the traditional LTE system. The terminal device may determine that the CSS is composed of the first 16 CCEs in the downlink control region, and includes four candidate PDCCHs with a CCE aggregation level of 4 and two candidate PDCCHs with a CCE aggregation level of 8. Since the search space is a candidate PDCCH set, the PDCCH is aggregated by the CCE. Therefore, to determine the search space with the aggregation level of L, it is necessary to determine the constituent search space.

CCE, where k is the current subframe number. Specifically, the number of the CCE constituting the CSS may be:

为聚合级别为L时，CSS中候选PDCCH个数。N_CCE,k为子帧k上的CCE总数。Where i=0,...,L-1,

The number of candidate PDCCHs in the CSS when the aggregation level is L. N _CCE,k is the total number of CCEs on subframe k.

个CCE聚合级为4的候选PDCCH和

个CCE聚合级为8的候选PDCCH。For another example, the terminal device may determine a group search space, where the GSS is composed of N CCEs other than the first 16 CCEs in the control region, and N is a positive integer greater than 1. Preferably, including

Candidate PDCCHs with a CCE aggregation level of 4

A candidate PDCCH with a CCE aggregation level of 8.

In an alternative embodiment, the terminal device determines that the GSS and CSS are continuously distributed. Preferably, the composition of the GSS The CCE number can be:

为聚合级别为L时，GSS中候选PDCCH个数。

为聚合级别为L时，CSS中候选PDCCH的数量。N_CCE,k为子帧k上的CCE总数，L为4或者8。Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L.

The number of candidate PDCCHs in the CSS when the aggregation level is L. N _{CCE, k} is the total number of CCE subframe k, L 4 or 8.

In an alternative embodiment, the terminal device determines a discontinuous distribution of GSS and CSS. Preferably, the number of the CCE constituting the GSS may be:

Where n is a positive integer.

In an alternative embodiment, the terminal device determines the GSS based on the G-RNTI. Preferably, the number of the CCE constituting the GSS may be:

Y_k＝(A·Y_k-1)mod D，Y_-1＝n_RNTI≠0，A＝39827,D＝65537，

n_s为一个无线帧的时隙(slot)序号，n_RNTI为G-RNTI值。或者，其中Y_-1＝F(n_RNTI,n)≠0，F(k)表示某种函数。优选地，L为4或8。Where i=0,...,L-1,

Y _k =(A·Y _k-1 )mod D, Y _-1 =n _RNTI ≠0, A=39827, D=65537,

n _s is the slot number of one radio frame, and n _RNTI is the G-RNTI value. Or, where Y _-1 = F(n _RNTI , n) ≠ 0, F(k) represents a certain function. Preferably, L is 4 or 8.

In an alternative embodiment, the downlink transmission mode may be determined before the terminal device determines the search space. Further, the terminal device may receive the third signaling sent by the network device, where the third signaling includes information for indicating a downlink transmission mode, and further determines a downlink transmission mode according to the third signaling. Optionally, the multicast PDSCH transmission and the unicast PDSCH transmission adopt the same downlink transmission mode. Therefore, the terminal device may determine that the downlink transmission mode is a downlink transmission mode adopted by the unicast PDSCH transmission.

Optionally, the terminal device determines the downlink transmission mode according to the number of PBCH antenna ports. When the number of PBCH antenna ports is 1, the terminal device determines that the downlink transmission mode is the transmission mode 1; when the number of PBCH antenna ports is greater than 1, the terminal device determines that the downlink transmission mode is the transmission mode 2 or 3. Further, the terminal device may receive signaling sent by the network device, where the signaling is used to indicate that the downlink transmission mode is the transmission mode 2 or 3. The signaling can be high layer signaling or physical layer signaling.

Optionally, the terminal device determines the transmission scheme according to the number of PBCH antenna ports. When PBCH days The number of line ports is 1, and the terminal device determines that the downlink transmission scheme is single antenna port transmission; when the number of PBCH antenna ports is greater than 1, the terminal device determines that the downlink transmission scheme is large delay cyclic delay diversity or transmit diversity. Further, the terminal device may receive signaling sent by the network device, where the signaling is used to indicate that the downlink transmission scheme is large delay cyclic delay diversity or transmit diversity. The signaling can be high layer signaling or physical layer signaling.

S402: The terminal device detects DCI in the search space, and the DCI is used to schedule PDSCH transmission, and the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation manner.

After the terminal device determines the search space, the DCI may be detected in the search space, wherein the DCI is used to schedule PDSCH transmission, and the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation manner.

Optionally, the format of the DCI may be DCI format 1A, DCI format 1 or DCI format 2A. When the downlink transmission mode is the transmission mode 1 or the transmission mode 2, the DCI detected by the terminal device may be DCI format 1A or DCI format 1. When the downlink transmission mode is the transmission mode 3, the DCI detected by the terminal device may be DCI format 1A or DCI format 2A.

Optionally, the format of the DCI may be DCI format 1A, DCI format 1C, DCI format 1 or DCI format 2A. When the downlink transmission mode is the transmission mode 1 or the transmission mode 2, the DCI detected by the terminal device may be DCI format 1A, DCI format 1C, or DCI format 1. When the downlink transmission mode is the transmission mode 3, the DCI detected by the terminal device may be DCI format 1A, DCI format 1C or DCI format 2A.

In an optional embodiment, the terminal device may detect the DCI in the search space according to the first relationship, where the first relationship is a relationship between the search space, the DCI, and the PDSCH transmission scheme.

Further, the first relationship may include: when the format of the DCI is DCI format 1A, the search space is CSS and GSS; when the format of the DCI is DCI format 1 or DCI format 2A, the search space is GSS. Exemplarily, the first relationship can be as shown in Table 5.

Further, the first relationship may include: when the DCI is DCI format 1A, the search space is CSS; when the DCI is DCI format 1 or DCI format 2A, the search space is GSS. Compared with the foregoing manner of determining the search space, the number of blind detections of the PDCCH in the embodiment of the present invention is small. Exemplarily, the first relationship can be as shown in Table 6.

Further optionally, the first relationship may include: when the format of the DCI is DCI format 1A or In DCI format 1C, the search space is CSS and GSS; when the DCI format is DCI format 1 or DCI format 2A, the search space is GSS. Exemplarily, the first relationship can be as shown in Table 7.

Further, the first relationship may include: when the DCI is DCI format 1A or DCI format 1C, the search space is CSS; when the DCI is DCI format 1 or DCI format 2A, the search space is GSS. Compared with the foregoing manner of determining the search space, the number of blind detections of the PDCCH in the embodiment of the present invention is small. Exemplarily, the first relationship can be as shown in Table 8.

Optionally, the first relationship may include: for the transmission mode 1 or the transmission mode 2, when the DCI is DCI format 1A or DCI format 1, the search space is CSS; for the transmission mode 3, when the DCI is DCI format 1A or DCI format At 2A, the search space is CSS. Compared with the manner of determining the above search space, the embodiment of the present invention does not need to increase the GSS. Exemplarily, the first relationship can be as shown in Table 9.

Further, the first relationship may include: for the transmission mode 1 or the transmission mode 2, when the DCI is DCI format 1A, DCI format 1 or DCI format 1C, the search space is CSS; for the transmission mode 3, when the DCI is DCI In format 1A, DCI format 2A or DCI format 1C, the search space is CSS. Compared with the manner of determining the above search space, the embodiment of the present invention does not need to increase the GSS. Exemplarily, the first relationship can be as shown in Table 10.

Optionally, before detecting the DCI in the search space, the terminal device further includes: receiving signaling sent by the network device, where the signaling includes information used to indicate the G-RNTI, where the signaling is high layer signaling or physical layer signaling. The G-RNTI is used to scramble the CRC, which is used for error detection of the DCI. Detecting the DCI in the search space includes: the terminal device blindly detects the candidate PDCCH in the search space according to the number of information bits of the DCI, and uses the G-RNTI to descramble the CRC of the candidate PDCCH, and then performs CRC check, and the candidate PDCCH with the correct CRC check is The PDCCH carrying the DCI.

S403. The terminal device receives the PDSCH sent by the network device.

In the method for transmitting control information shown in FIG. 4, the terminal device determines a search space, detects DCI in the search space, DCI is used to schedule PDSCH transmission, and PDSCH transmission uses a large delay cyclic delay diversity transmission mode and/or non-contiguous resources. In the block allocation mode, the PDSCH transmitted by the network device may be received, and the PDSCH may be received by using a large delay cyclic delay diversity transmission mode or a discontinuous resource block allocation manner. Because a new GSS is defined for the DCI with the bearer format DCI format 2A or DCI format 1, or the CSS can be used to carry the DCI in the format DCI format 2A or DCI format 1. Therefore, a large delay cyclic delay diversity transmission mode or a discontinuous resource block allocation mode can be adopted in SC-PTM transmission.

The embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium can store a program, and the program includes some or all of the steps in the method embodiment shown in FIG. 1 or FIG. 2 when executed.

The embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium may store a program, and the program includes some or all of the steps in the method embodiment shown in FIG. 3 or FIG. 4 when executed.

Referring to FIG. 5, FIG. 5 is a schematic structural diagram of a device for transmitting control information according to a first embodiment of the present invention. The device for transmitting control information may be used to implement the method embodiment shown in FIG. In some or all of the steps, the transmission device of the control information may include at least a configuration unit 501 and a sending unit 502, where:

The configuration unit 501 is configured to configure DCI, and the DCI is used to schedule PDSCH transmission. The number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission uses a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation. the way.

The sending unit 502 is configured to send the DCI to the at least one terminal device.

The sending unit 502 is further configured to send the PDSCH to the at least one terminal device.

In an alternative embodiment, the DCI includes an MCS field, the MCS field is used to indicate the MCS used by the two transport blocks, and the two transport blocks use the same MCS.

In an alternative embodiment, the DCI includes a first MCS domain and a second MCS domain, wherein:

The first MCS field is used to indicate the MCS used by the first transport block, and the second MCS field is used to indicate the MCS used by the second transport block. The number of information bits of the first MCS domain is the same as the number of information bits of the second MCS domain. . or

The first MCS field is used to indicate the MCS used by the first transport block, the second MCS field is used to indicate the MCS used by the second transport block, and the MCS used by the second transport block is determined by the value of the first MCS field. The value of the second MCS field is added, and the number of information bits in the second MCS domain is less than the first The number of information bits in the MCS domain.

In an optional embodiment, the configuration unit 501 is further configured to: before the sending unit 502 sends the PDSCH to the at least one terminal device, configure the mapping of the transport block to the codeword according to the preset mapping relationship. The preset mapping relationship is:

When the PDSCH is transmitted by two transport blocks, the first transport block corresponds to codeword 0 and the second transport block corresponds to codeword 1, or the second transport block corresponds to codeword 0 and the first transport block corresponds to codeword 1.

When the PDSCH is transmitted using the first transport block, the first transport block corresponds to codeword 0.

When the PDSCH is transmitted using the second transport block, the second transport block corresponds to codeword 0.

In an alternative embodiment, the DCI includes a transport block to codeword exchange identification field, and the transport block to codeword exchange identification field is used to indicate a mapping relationship between the transport block and the codeword.

In an optional embodiment, the configuration unit 501 is further configured to configure the transmission scheme of the PDSCH to be a large delay cyclic delay diversity and configure the PDSCH transmission to use two transmit antennas before configuring the DCI.

In an alternative embodiment, the DCI includes a precoding information field, and the precoding information field is used to indicate the number of layers.

In an optional embodiment, the DCI includes a transmission scheme identifier field, and the transmission scheme identifier field is used to identify that the transmission scheme of the PDSCH is large delay cyclic delay diversity or transmit diversity.

In an optional embodiment, the DCI includes a resource block allocation field, the resource block allocation field includes a bitmap, the bitmap is used to indicate the allocated at least one RBG, and one RBG is composed of Q consecutive LVRBs, where Q is greater than P The integer, P = 1, 2, 3 or 4.

In an optional embodiment, the DCI includes a resource block allocation field, the resource block allocation field is used to indicate the allocated LVRB, the LVRB is located in one RBG subset, and the RBG subset is one of the Q RBG subsets, where Q is greater than P The integer, P = 1, 2, 3 or 4.

In an optional embodiment, the DCI includes a resource block allocation field, where the resource block allocation field is used to indicate two resource block sets, each resource block set includes one or more consecutive RBGs, and one RBG is composed of P consecutive LVRBs. Where P = 1, 2, 3 or 4.

In an optional embodiment, the apparatus for transmitting control information in the embodiment of the present invention may further include:

The determining unit 503 is configured to determine the available transmission bandwidth before the configuration unit 501 configures the DCI, and the available transmission bandwidth is smaller than the downlink system bandwidth.

The configuration unit 501 is configured to configure the DCI to include a resource block allocation domain, where the resource block indicated by the resource block allocation domain is located in an available transmission bandwidth.

Further, the DCI further includes a resource allocation mode identifier field, where the resource allocation mode identifier field is used to identify that the resource allocation mode is a continuous resource block allocation or a discontinuous resource block allocation.

In an optional embodiment, the DCI is located in the CSS or the GSS, and the configuration unit 501 is further configured to: before the sending unit 502 sends the DCI to the at least one terminal device, configure the CSS and/or the GSS, where the CSS is the first 16 in the downlink control area. The control channel unit is composed of CCEs. The GSS is composed of N CCEs other than the first 16 CCEs in the downlink control region, and N is a positive integer greater than 1.

Further, if the GSS and the CSS are continuously distributed, the number of the CCEs included in the GSS is:

为聚合级别为L时，GSS中候选PDCCH的数量，

为聚合级别为L时，CSS中候选PDCCH的数量，N_CCE,k为子帧k上的CCE的数量，L为4或8。Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L,

When the aggregation level is L, the number of candidate PDCCHs in the CSS, N _CCE,k is the number of CCEs on the subframe k, and L is 4 or 8.

Further optionally, the GSS is determined according to the cell radio network temporary identifier G-NRT1, and the number of the CCE included in the GSS is

为聚合级别为L时，GSS中候选PDCCH的数量，Y_k＝(A·Y_k-1)mod D，Y_-1＝n_RNT1≠0，A＝39827，D＝65537，

n_s为一个无线帧的时隙序号，n_RNT1为G-NRT1值，L为4或8。Where i=0,...,L-1,

When the aggregation level is L, the number of candidate PDCCHs in the GSS, Y _k = (A·Y _k-1 ) mod D, Y _-1 = n _RNT1 ≠ 0, A = 39827, D = 65537,

n _s is the slot number of a radio frame, n _RNT1 is the G-NRT1 value, and L is 4 or 8.

Further, the configuration unit 501 is configured to configure a first subframe set, and configure a GSS on the first subframe set, where the subframe in the first subframe set satisfies (10×n _f +n _sbf −n _OFFSET ) modM=0, n _f represents the system frame number, n _sbf represents the subframe number, and n _OFFSET represents the offset subframe number.

In the transmission apparatus of the control information shown in FIG. 5, the configuration unit 501 configures DCI, and the DCI is used to schedule PDSCH transmission. The number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission uses large delay cyclic delay diversity. In the transmission mode and/or the discontinuous resource block allocation manner, the sending unit 502 sends the DCI to the at least one terminal device, and sends the PDSCH to the at least one terminal device, and may adopt the large delay cyclic delay diversity transmission mode or the non-SC-PTM transmission. Continuous resource block allocation.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of a network device according to an embodiment of the present invention. The network device provided by the embodiment of the present invention may be used to implement the foregoing embodiments of the present invention shown in FIG. For the convenience of the description, only the parts related to the embodiments of the present invention are shown. For the specific technical details not disclosed, please refer to the embodiments of the present invention shown in FIG.

As shown in FIG. 6, the network device includes at least one processor 601, such as a CPU, at least one transmitter 603, a memory 604, and at least one communication bus 602. Among them, the communication bus 602 is used to implement connection communication between these components. The transmitter 603 may be combined with the sending unit shown in FIG. 5. Specifically, the transmitter 603 may be a network interface, and optionally may include a standard wired interface and a wireless interface (such as a WI-FI interface) for external use. The network communicates. Among them, the memory 604 may include a high speed RAM memory, and may also include a non-unstable memory such as at least one disk memory. The memory 604 can optionally include at least one storage device located remotely from the aforementioned processor 601. The processor 601 can be combined with the configuration unit shown in FIG. 5 and the determination unit. A set of program codes is stored in the memory 604, and the processor 601 calls the program code stored in the memory 604 for performing the following operations:

The DCI is configured to schedule PDSCH transmission. The number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation mode.

The DCI is transmitted to the at least one terminal device through the transmitter 603.

The PDSCH is transmitted to the at least one terminal device through the transmitter 603.

Specifically, the network device introduced in the embodiment of the present invention may be used to implement some or all of the processes in the method embodiment introduced by the present invention in conjunction with FIG.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of a device for transmitting control information according to a second embodiment of the present invention. The device for transmitting control information may be used to implement the method in the embodiment shown in FIG. In some or all of the steps, the transmission device of the control information may include at least a receiving unit 701 and an obtaining unit 702, where:

The receiving unit 701 is configured to receive the DCI sent by the network device, where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A.

The obtaining unit 702 is configured to obtain scheduling information for the PDSCH transmission from the DCI, where the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation manner.

The receiving unit 701 is further configured to receive the PDSCH sent by the network device according to the scheduling information.

In an optional embodiment, the DCI includes an MCS domain, and the obtaining unit 702 is configured to determine that the MCS used by the two transport blocks is the value of the MCS domain, where the two transport blocks adopt the same MCS.

In an optional embodiment, the DCI includes a first MCS domain and a second MCS domain, and the acquiring unit 702 is configured to determine that the MCS used by the first transport block is the value of the first MCS domain, and the second transport block is used. The MCS is the value of the second MCS domain. or

The obtaining unit 702 is configured to determine that the MCS used by the first transport block is the value of the first MCS domain, and the MCS used by the second transport block is determined by the value of the first MCS domain and the value of the second MCS domain. In addition, the number of information bits of the second MCS domain is less than the number of information bits of the first MCS domain.

In an optional embodiment, the apparatus for transmitting control information in the embodiment of the present invention may further include:

The determining unit 703 is configured to determine a mapping of the transport block to the codeword according to the preset mapping relationship before the receiving unit 701 receives the PDSCH sent by the network device according to the scheduling information. The preset mapping relationship is:

When the PDSCH is transmitted by two transport blocks, the first transport block corresponds to codeword 0 and the second transport block corresponds to codeword 1, or the second transport block corresponds to codeword 0 and the first transport block corresponds to codeword 1.

When the PDSCH is transmitted using the first transport block, the first transport block corresponds to codeword 0.

When the PDSCH is transmitted using the second transport block, the second transport block corresponds to codeword 0.

In an optional embodiment, the DCI includes a transport block to a codeword exchange identifier field, and the obtaining unit 702 is configured to determine a mapping relationship between the transport block and the codeword according to the transport block to the codeword exchange identifier field.

In an optional embodiment, the apparatus for transmitting control information in the embodiment of the present invention may further include:

The determining unit 703 is configured to determine, before the receiving unit 701 receives the PDSCH sent by the network device according to the scheduling information, that the transmission scheme of the PDSCH is a large delay cyclic delay diversity, and determine that the PDSCH transmission uses two transmitting antennas.

In an optional embodiment, the DCI includes a precoding information field, and the obtaining unit 702 is configured to determine the number of layers according to the precoding information field.

In an optional embodiment, the DCI includes a transmission scheme identifier field, and the obtaining unit 702 is configured to determine, according to the transmission scheme identifier field, that the transmission scheme of the PDSCH is a large delay cyclic delay diversity or a transmit diversity.

In an optional embodiment, the DCI includes a resource block allocation field, and the resource block allocation field includes a bitmap, and the acquiring unit 702 is configured to determine, according to the bitmap, the allocated at least one resource block group RBG, one RBG. It consists of Q consecutive LVRBs, where Q is an integer greater than P, P=1, 2, 3 or 4.

In an optional embodiment, the DCI includes a resource block allocation field, and the obtaining unit 702 is configured to determine, according to the resource block allocation domain, the allocated LVRB, where the LVRB is located in one RBG subset, and the RBG subset is one of the Q RBG subsets. Where Q is an integer greater than P, P=1, 2, 3 or 4.

In an optional embodiment, the DCI includes a resource block allocation field, and the obtaining unit 702 is configured to determine two resource block sets according to the resource block allocation domain, where each resource block set includes one or more consecutive RBGs, and one RBG is configured by P. Consecutive LVRB composition, where P = 1, 2, 3 or 4.

In an optional embodiment, the DCI includes a resource block allocation domain, and the apparatus for transmitting control information in the embodiment of the present invention may further include:

The determining unit 703 is configured to determine an available transmission bandwidth before the obtaining unit 702 acquires scheduling information for the PDSCH transmission from the DCI, where the available transmission bandwidth is smaller than the downlink system bandwidth.

The obtaining unit 702 is configured to determine, according to the resource block allocation domain, the allocated at least one resource block, where the allocated at least one resource block is located in an available transmission bandwidth.

Further, optionally, the DCI further includes a resource allocation manner identifier field, and the obtaining unit 702 is configured to determine, according to the resource allocation manner, that the resource allocation manner is a continuous resource block allocation or a discontinuous resource block allocation.

In an optional embodiment, the receiving unit 701 is configured to determine a search space, where the search space is CSS and/or GSS, and the CSS is composed of the first 16 CCEs in the downlink control region, and the GSS is included by the first 16 CCEs in the downlink control region. N CCE components, N is a positive integer greater than 1.

The receiving unit 701 is further configured to acquire the DCI in the search space.

Further, if the GSS and the CSS are continuously distributed, the number of the CCEs included in the GSS is:

为聚合级别为L时，GSS中候选PDCCH的数量，

为聚合级别为L时，CSS中候选PDCCH的数量，N_CCEk为子帧k上的CCE的数量，L为4或8。Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L,

When the aggregation level is L, the number of candidate PDCCHs in the CSS, N _CCEk is the number of CCEs on the subframe k, and L is 4 or 8.

Further optionally, the GSS is determined according to the cell radio network temporary identifier G-NRT1, and the number of the CCE included in the GSS is

为聚合级别为L时，GSS中候选 PDCCH的数量，Y_k＝(A·Y_k-1)mod D，Y_-1＝n_RNT1≠0，A＝39827，D＝65537，

n_s为一个无线帧的时隙序号，n_RNT1为G-NRT1值，L为4或8。Where i=0,...,L-1,

When the aggregation level is L, the number of candidate PDCCHs in the GSS, Y _k = (A·Y _k-1 ) mod D, Y _-1 = n _RNT1 ≠ 0, A = 39827, D = 65537,

n _s is the slot number of a radio frame, n _RNT1 is the G-NRT1 value, and L is 4 or 8.

Further, the receiving unit 701 is configured to detect the GSS on the first subframe set, where the subframe in the first subframe set satisfies (10×n _f +n _sbf −n _OFFSET ) modM=0, n _f Indicates the system frame number, n _sbf indicates the subframe number, and n _OFFSET indicates the offset subframe number.

In the transmission device of the control information shown in FIG. 7, the receiving unit 701 receives the DCI transmitted by the network device, the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the obtaining unit 702 acquires the DCSCH for the PDSCH transmission. The scheduling information, the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation manner, and the receiving unit 701 receives the PDSCH transmitted by the network device according to the scheduling information, and may adopt a large delay cyclic delay diversity transmission mode or a discontinuous manner. The resource block allocation mode receives the PDSCH.

Referring to FIG. 8, FIG. 8 is a schematic structural diagram of a terminal device according to an embodiment of the present invention. The terminal device provided by the embodiment of the present invention may be used to implement the method implemented in the foregoing embodiment of the present invention shown in FIG. For ease of description, only parts related to the embodiments of the present invention are shown. Without specific details, please refer to the embodiments of the present invention shown in FIG.

As shown in FIG. 8, the terminal device includes at least one processor 801, such as a CPU, at least one receiver 803, a memory 804, and at least one communication bus 802. Among them, the communication bus 802 is used to implement connection communication between these components. The receiver 803 can be combined with the receiving unit shown in FIG. 7. Specifically, the receiver 803 can be a network interface, and optionally can include a standard wired interface and a wireless interface (such as a WI-FI interface) for external use. The network communicates. The memory 804 may include a high speed RAM memory and may also include a non-stable memory such as at least one disk memory. The memory 804 can optionally include at least one storage device located remotely from the aforementioned processor 801. The processor 801 can be combined with the acquisition unit and the determination unit shown in FIG. A set of program codes is stored in the memory 804, and the processor 801 calls the program code stored in the memory 804 for performing the following operations:

The DCI transmitted by the network device is received by the receiver 803, and the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A.

Obtain scheduling information for PDSCH transmission from DCI, and PDSCH transmission adopts large delay Ring delay diversity transmission mode and/or discontinuous resource block allocation mode.

The PDSCH transmitted by the network device is received by the receiver 803 according to the scheduling information.

Specifically, the terminal device introduced in the embodiment of the present invention may be used to implement some or all of the processes in the method embodiment introduced by the present invention in conjunction with FIG.

Referring to FIG. 9, FIG. 9 is a schematic structural diagram of a transmission system for controlling information according to an embodiment of the present invention. As shown in the figure, a transmission system for control information in an embodiment of the present invention may include at least a network device 901 and a terminal device. 902, the network device 901 can be combined with the transmission device of the control information shown in FIG. 5, and the terminal device 902 can be combined with the transmission device of the control information shown in FIG. 7, wherein:

The network device 901 is configured to configure DCI, and the DCI is used to schedule PDSCH transmission. The number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission uses a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation. the way.

The network device is further configured to send the DCI to the at least one terminal device 902.

The terminal device 902 is configured to acquire scheduling information for the PDSCH transmission from the DCI.

The terminal device 902 is further configured to receive the PDSCH sent by the network device 901 according to the scheduling information.

Specifically, the transmission system of the control information introduced in the embodiment of the present invention may be used to implement some or all of the processes in the method embodiments introduced in conjunction with FIG. 1 and FIG.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

Any process or method description in the flowcharts or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a particular logical function or process. And the scope of the preferred embodiments of the invention includes additional implementations, in which the functions may be performed in a substantially simultaneous manner or in the reverse order, depending on the order in which they are illustrated, which should be It will be understood by those skilled in the art to which the embodiments of the present invention pertain.

The logic and/or steps represented in the flowchart or otherwise described herein, for example, a list of programs that can be considered as executable instructions for implementing logical functions, can be embodied in any computer readable medium, Used by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions and execute instructions from an instruction execution system, apparatus, or device) Used for equipment. For the purposes of this specification, a "computer-readable medium" can be any apparatus that can contain, store, communicate, propagate, or transport a program for use in an instruction execution system, apparatus, or device, or in conjunction with the instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer readable media include the following: electrical connections (electronic devices) having one or more wires, portable computer disk cartridges (magnetic devices), random access memory (RAM), Read only memory (ROM), erasable editable read only memory (EPROM or flash memory), fiber optic devices, and portable compact disk read only memory (CDROM). In addition, the computer readable medium may even be a paper or other suitable medium on which the program can be printed, as it may be optically scanned, for example by paper or other medium, followed by editing, interpretation or, if appropriate, other suitable The method is processed to obtain the program electronically and then stored in computer memory.

It should be understood that portions of the invention may be implemented in hardware, software, firmware or a combination thereof. In the above-described embodiments, multiple steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented by any one or combination of the following techniques well known in the art: having logic gates for implementing logic functions on data signals. Discrete logic circuits, application specific integrated circuits with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

One of ordinary skill in the art can understand all or all of the methods carried by the above embodiments. Some of the steps may be performed by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiments.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. The integrated modules, if implemented in the form of software functional modules and sold or used as stand-alone products, may also be stored in a computer readable storage medium.

The above mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like. Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims (71)

A method for transmitting control information, comprising: The network device configures downlink control information DCI, where the DCI is used to schedule physical downlink shared channel PDSCH transmission, the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission uses a large delay cyclic delay diversity transmission. Mode and/or non-contiguous resource block allocation method; Transmitting, by the network device, the DCI to at least one terminal device; The network device sends the PDSCH to the at least one terminal device. The method according to claim 1, wherein said DCI comprises a modulation and coding scheme MCS field, said MCS field is used to indicate MCS used by two transport blocks, said two transport blocks adopting the same MCS . The method of claim 1 wherein said DCI comprises a first MCS domain and a second MCS domain, wherein: The first MCS field is used to indicate the MCS used by the first transport block, and the second MCS field is used to indicate the MCS used by the second transport block, the number of information bits of the first MCS domain, and the number The number of information bits of the second MCS domain is the same; or The first MCS field is used to indicate the MCS used by the first transport block, the second MCS field is used to indicate the MCS used by the second transport block, and the MCS adopted by the second transport block is The value of the first MCS field is added to the value of the second MCS field, and the number of information bits of the second MCS field is less than the number of information bits of the first MCS field. The method according to any one of claims 1 to 3, wherein before the network device sends the PDSCH to the at least one terminal device, the method further includes: The network device configures a mapping of a transport block to a codeword according to a preset mapping relationship; The preset mapping relationship is: When the PDSCH is transmitted by using two transport blocks, the first transport block corresponds to codeword 0 and the second transport block corresponds to codeword 1, or the second transport block corresponds to codeword 0 and the first transport block corresponds to codeword 1; When the PDSCH is transmitted by using the first transport block, the first transport block corresponds to codeword 0; When the PDSCH is transmitted by using the second transport block, the second transport block corresponds to codeword 0. The method according to any one of claims 1 to 3, wherein the DCI comprises a transport block to a codeword exchange identifier field, and the transport block to codeword exchange identifier field is used to indicate a mapping of a transport block and a codeword. relationship. The method according to any one of claims 1 to 5, wherein before the network device configures the DCI, the method further includes: The transmission scheme of the network device configuring the PDSCH is a large delay cyclic delay diversity, and the PDSCH transmission is configured to adopt two transmit antennas. The method according to any one of claims 1 to 5, wherein the DCI comprises a precoding information field, and the precoding information field is used to indicate the number of layers. The method according to any one of claims 1 to 7, wherein the DCI comprises a transmission scheme identifier field, and the transmission scheme identifier field is used to identify that the transmission scheme of the PDSCH is a large delay cyclic delay diversity or transmission. separation. The method according to any one of claims 1 to 8, wherein the DCI comprises a resource block allocation field, the resource block allocation field comprises a bitmap, and the bitmap is used to indicate the allocated at least one resource block. Group RBG, one RBG is composed of Q consecutive centralized virtual resource blocks LVRB, where Q is an integer greater than P, P=1, 2, 3 or 4. The method according to any one of claims 1 to 8, wherein the DCI includes a resource block allocation field, the resource block allocation field is used to indicate an allocated LVRB, and the LVRB is located in an RBG subset, The RBG subset is one of the Q RBG subsets, where Q is an integer greater than P, P = 1, 2, 3, or 4. The method according to any one of claims 1 to 8, wherein the DCI includes a resource block allocation field, and the resource block allocation field is used to indicate two resource block sets, each of the resource block sets including one or Multiple consecutive RBGs, one RBG consisting of P consecutive LVRBs, where P = 1, 2, 3 or 4. The method according to any one of claims 1 to 8, wherein before the network device configures the DCI, the method further includes: Determining, by the network device, an available transmission bandwidth, where the available transmission bandwidth is less than a downlink system bandwidth; The network device configuring the DCI includes: The network device configuring the DCI includes a resource block allocation domain, and the resource block indicated by the resource block allocation domain is located within the available transmission bandwidth. The method according to any one of claims 9 to 12, wherein the DCI further includes a resource allocation mode identifier field, and the resource allocation mode identifier field is used to identify that the resource allocation mode is a continuous resource block allocation or non- Continuous resource block allocation. The method according to any one of claims 1 to 13, wherein the DCI is located in a common search space CSS or a group search space GSS; Before the network device sends the DCI to the at least one terminal device, the method further includes: The network device is configured with a CSS and/or a GSS, where the CSS is composed of the first 16 control channel units CCEs in the downlink control region, and the GSS is composed of N CCEs other than the first 16 CCEs in the downlink control region. N is a positive integer greater than one. The method according to claim 14, wherein the GSS and the CSS are continuously distributed, and the number of CCEs included in the GSS is:

Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L,

When the aggregation level is L, the number of candidate PDCCHs in the CSS, N _CCE,k is the number of CCEs on the subframe k, and L is 4 or 8. The method according to claim 14, wherein the GSS is determined according to a cell radio network temporary identifier G-NRT1, and the number of CCEs included in the GSS is;

Where i=0,...,L-1,

When the aggregation level is L, the number of candidate PDCCHs in the GSS, Y _k = (A·Y _k-1 ) modD, Y _-1 = n _RNT1 ≠ 0, A = 39827, D = 65537,

n _s is the slot number of a radio frame, n _RNT1 is the G-NRT1 value, and L is 4 or 8. The method according to any one of claims 14 to 16, wherein the configuring the CSS and/or the GSS by the network device comprises: The network device configures a first subframe set, and configures a GSS on the first subframe set, where the subframe in the first subframe set satisfies (10×n _f +n _sbf -n _OFFSET ) modM =0, n _f represents the system frame number, n _sbf represents the subframe number, and n _OFFSET represents the offset subframe number. A method for transmitting control information, comprising: Receiving, by the terminal device, a DCI sent by the network device, where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A; The terminal device acquires scheduling information for PDSCH transmission from the DCI, where the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation manner; The terminal device receives the PDSCH sent by the network device according to the scheduling information. The method of claim 18 wherein said DCI comprises an MCS domain; Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including: The terminal device determines that the MCS used by the two transport blocks is the value of the MCS domain, where the two transport blocks adopt the same MCS. The method of claim 18, wherein the DCI comprises a first MCS domain and a second MCS domain; Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including: Determining, by the terminal device, that the MCS used by the first transport block is the value of the first MCS domain, and the MCS used by the second transport block is a value of the second MCS domain; or The terminal device determines that the MCS used by the first transport block is the value of the first MCS domain, and the MCS used by the second transport block is the value of the first MCS domain and the second MCS domain. The sum of the values of the second MCS field is smaller than the number of information bits of the first MCS domain. The method according to any one of claims 18 to 20, wherein before the terminal device receives the PDSCH sent by the network device according to the scheduling information, the method further includes: Determining, by the terminal device, a mapping of a transport block to a codeword according to a preset mapping relationship; The preset mapping relationship is: When the PDSCH is transmitted by using two transport blocks, the first transport block corresponds to codeword 0 and the second transport block corresponds to codeword 1, or the second transport block corresponds to codeword 0 and the first transport block corresponds to codeword 1; When the PDSCH is transmitted by using the first transport block, the first transport block corresponds to codeword 0; When the PDSCH is transmitted by using the second transport block, the second transport block corresponds to codeword 0. The method according to any one of claims 18 to 20, wherein the DCI comprises a transport block to a codeword exchange identifier field; Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including: The terminal device determines a mapping relationship between the transport block and the codeword according to the transport block to the codeword exchange identifier field. The method according to any one of claims 18 to 22, wherein before the terminal device receives the PDSCH sent by the network device according to the scheduling information, the method further includes: The terminal device determines that the transmission scheme of the PDSCH is a large delay cyclic delay diversity, and determines that the PDSCH transmission uses two transmit antennas. A method according to any one of claims 18 to 22, wherein said DCI comprises Precoded information field; Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including: The terminal device determines the number of layers according to the precoding information field. The method according to any one of claims 18 to 24, wherein the DCI comprises a transmission scheme identification field; Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including: The terminal device determines, according to the transmission scheme identifier field, that the transmission scheme of the PDSCH is a large delay cyclic delay diversity or a transmit diversity. The method according to any one of claims 18 to 25, wherein the DCI comprises a resource block allocation field, and the resource block allocation field comprises a bitmap; Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including: The terminal device determines the allocated at least one resource block group RBG according to the bitmap, and one RBG is composed of Q consecutive LVRBs, where Q is an integer greater than P, P=1, 2, 3 or 4. The method according to any one of claims 18 to 25, wherein the DCI comprises a resource block allocation domain; Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including: The terminal device determines the allocated LVRB according to the resource block allocation field, where the LVRB is located in one RBG subset, and the RBG subset is one of the Q RBG subsets, where Q is an integer greater than P, P= 1, 2, 3 or 4. The method according to any one of claims 18 to 25, wherein the DCI comprises a resource block allocation domain; Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including: The terminal device determines two resource block sets according to the resource block allocation domain, each of the resource block sets includes one or more consecutive RBGs, and one RBG is composed of P consecutive LVRBs, where P=1, 2, 3 or 4. The method according to any one of claims 18 to 25, wherein the DCI comprises a resource block allocation domain; Before the terminal device acquires the scheduling information for the PDSCH transmission from the DCI, the method further includes: Determining, by the terminal device, an available transmission bandwidth, where the available transmission bandwidth is smaller than a downlink system bandwidth; Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including: And determining, by the terminal device, the allocated at least one resource block according to the resource block allocation domain, where the allocated at least one resource block is located in the available transmission bandwidth. The method according to any one of claims 26 to 29, wherein the DCI further comprises a resource allocation mode identification field; Obtaining, by the terminal device, the scheduling information for the PDSCH transmission from the DCI, including: The terminal device determines, according to the resource allocation manner identifier field, that the resource allocation manner is a continuous resource block allocation or a discontinuous resource block allocation. The method according to any one of claims 18 to 30, wherein the receiving, by the terminal device, the DCI sent by the network device comprises: The terminal device determines a search space, where the search space is CSS and/or GSS, and the CSS is composed of the first 16 CCEs in the downlink control region, and the GSS is other than the first 16 CCEs in the downlink control region. N CCE components, N is a positive integer greater than 1; The DCI is obtained within the search space. The method according to claim 31, wherein the GSS and the CSS are continuously distributed, and the number of CCEs included in the GSS is:

Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L,

When the aggregation level is L, the number of candidate PDCCHs in the CSS, N _CCE,k is the number of CCEs on the subframe k, and L is 4 or 8. The method according to claim 31, wherein the GSS is determined according to a cell radio network temporary identifier G-NRT1, and the number of CCEs included in the GSS is;

Where i=0,...,L-1,

When aggregation level is L, the number of PDCCH candidates in _{GSS, Y k = (A · Y} k-1) modD, Y -1 = n RNT1 ≠ 0, A = 39827, D = 65537,

n _s is the slot number of a radio frame, n _RNT1 is the G-NRT1 value, and L is 4 or 8. The method according to any one of claims 31 to 33, wherein the determining, by the terminal device, the search space comprises: The terminal device detects a GSS on the first subframe set, where the subframe in the first subframe set satisfies (10×n _f +n _sbf −n _OFFSET ) modM=0, where n _f represents a system frame number, n _sbf represents the subframe number, and n _OFFSET represents the offset subframe number. A transmission device for controlling information, comprising: a configuration unit, configured to configure a DCI, where the DCI is used to schedule a PDSCH transmission, where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or Non-contiguous resource block allocation method; a sending unit, configured to send the DCI to at least one terminal device; The sending unit is further configured to send the PDSCH to the at least one terminal device. The apparatus according to claim 35, wherein said DCI comprises an MCS field, said MCS field being used to indicate an MCS employed by two transport blocks, said two transport blocks adopting the same MCS. The apparatus according to claim 35, wherein said DCI comprises a first MCS domain and a second MCS domain, wherein: The first MCS domain is used to indicate an MCS used by the first transport block, and the second MCS domain For indicating the MCS used by the second transport block, the number of information bits of the first MCS domain is the same as the number of information bits of the second MCS domain; or The first MCS field is used to indicate the MCS used by the first transport block, the second MCS field is used to indicate the MCS used by the second transport block, and the MCS adopted by the second transport block is The value of the first MCS field is added to the value of the second MCS field, and the number of information bits of the second MCS field is less than the number of information bits of the first MCS field. Apparatus according to any one of claims 35 to 37, wherein The configuration unit is further configured to: before the sending unit sends the PDSCH to the at least one terminal device, configure a mapping of a transport block to a codeword according to a preset mapping relationship; The preset mapping relationship is: When the PDSCH is transmitted by using two transport blocks, the first transport block corresponds to codeword 0 and the second transport block corresponds to codeword 1, or the second transport block corresponds to codeword 0 and the first transport block corresponds to codeword 1; When the PDSCH is transmitted by using the first transport block, the first transport block corresponds to codeword 0; When the PDSCH is transmitted by using the second transport block, the second transport block corresponds to codeword 0. The apparatus according to any one of claims 35 to 37, wherein said DCI comprises a transport block to codeword exchange identifier field, and said transport block to codeword exchange identifier field is used to indicate a mapping of transport blocks and codewords. relationship. Apparatus according to any one of claims 35 to 39, wherein The configuration unit is further configured to: before the DCI is configured, configure a transmission scheme of the PDSCH to be a large delay cyclic delay diversity, and configure the PDSCH transmission to use two transmit antennas. The apparatus according to any one of claims 35 to 39, wherein the DCI comprises a precoding information field, and the precoding information field is used to indicate a layer number. The device according to any one of claims 35 to 41, wherein the DCI comprises a transmission scheme identifier field, and the transmission scheme identifier field is used to identify that the transmission scheme of the PDSCH is large. Delay cyclic delay diversity or transmit diversity. The apparatus according to any one of claims 35 to 42, wherein the DCI includes a resource block allocation field, the resource block allocation field includes a bitmap, and the bitmap is used to indicate the allocated at least one RBG. An RBG consists of Q consecutive LVRBs, where Q is an integer greater than P, P = 1, 2, 3 or 4. The apparatus according to any one of claims 35 to 42, wherein the DCI includes a resource block allocation field, the resource block allocation field is used to indicate an allocated LVRB, and the LVRB is located in an RBG subset, The RBG subset is one of the Q RBG subsets, where Q is an integer greater than P, P = 1, 2, 3, or 4. The apparatus according to any one of claims 35 to 42, wherein the DCI includes a resource block allocation field, and the resource block allocation field is used to indicate two resource block sets, each of the resource block sets including one or Multiple consecutive RBGs, one RBG consisting of P consecutive LVRBs, where P = 1, 2, 3 or 4. The device according to any one of claims 35 to 42, wherein the device further comprises: a determining unit, configured to determine an available transmission bandwidth, where the available transmission bandwidth is smaller than a downlink system bandwidth, before the configuration unit configures the DCI; The configuration unit is configured to configure the DCI to include a resource block allocation domain, where the resource block indicated by the resource block allocation domain is located in the available transmission bandwidth. The device according to any one of claims 43 to 46, wherein the DCI further includes a resource allocation manner identifier field, where the resource allocation manner identifier field is used to identify that the resource allocation manner is a continuous resource block allocation or non- Continuous resource block allocation. The apparatus according to any one of claims 35 to 47, wherein the DCI is located in CSS or GSS; The configuration unit is further configured to configure CSS and/or GSS before the sending unit sends the DCI to the at least one terminal device, where the CSS is composed of the first 16 control channel units CCE in the downlink control region, The GSS is composed of N CCEs other than the first 16 CCEs in the downlink control region, and N is a positive integer greater than 1. The device according to claim 48, wherein the GSS and the CSS are continuously distributed, and the number of CCEs included in the GSS is:

Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L,

When the aggregation level is L, the number of candidate PDCCHs in the CSS, N _CCE,k is the number of CCEs on the subframe k, and L is 4 or 8. The device according to claim 48, wherein the GSS is determined according to a cell radio network temporary identifier G-NRT1, and the number of CCEs included in the GSS is;

Where i=0,...,L-1,

When the aggregation level is L, the number of candidate PDCCHs in the GSS, Y _k = (A·Y _k-1 ) modD, Y _-1 = n _RNT1 ≠ 0, A = 39827, D = 65537,

n _s is the slot number of a radio frame, n _RNT1 is the G-NRT1 value, and L is 4 or 8. Device according to any one of claims 48 to 50, characterized in that The configuration unit is configured to configure a first subframe set, and configure a GSS on the first subframe set, where the subframe in the first subframe set satisfies (10×n _f +n _sbf −n _OFFSET ) modM=0, n _f represents the system frame number, n _sbf represents the subframe number, and n _OFFSET represents the offset subframe number. A network device, comprising: a processor, a memory, and a transmitter, wherein the memory stores a set of program codes, and the processor calls program code stored in the memory for performing the following operations : Configuring a DCI, where the DCI is used to schedule PDSCH transmission, the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A, and the PDSCH transmission uses large delay cyclic delay diversity. Transmission mode and/or non-contiguous resource block allocation mode; Transmitting, by the transmitter, the DCI to at least one terminal device; Transmitting the PDSCH to the at least one terminal device by the transmitter. A transmission device for controlling information, comprising: a receiving unit, configured to receive a DCI sent by the network device, where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A; An acquiring unit, configured to acquire scheduling information for PDSCH transmission from the DCI, where the PDSCH transmission adopts a large delay cyclic delay diversity transmission mode and/or a discontinuous resource block allocation manner; The receiving unit is further configured to receive, according to the scheduling information, the PDSCH sent by the network device. The apparatus of claim 53, wherein said DCI comprises an MCS domain; The acquiring unit is configured to determine that the MCS used by the two transport blocks is the value of the MCS domain, where the two transport blocks adopt the same MCS. The apparatus according to claim 53, wherein said DCI comprises a first MCS domain and a second MCS domain; The acquiring unit is configured to determine that the MCS used by the first transport block is the value of the first MCS domain, and the MCS used by the second transport block is a value of the second MCS domain; or The acquiring unit is configured to determine that the MCS used by the first transport block is the value of the first MCS domain, and the MCS used by the second transport block is a value that is adopted by the first MCS domain and the first The value of the second MCS field is added, and the number of information bits of the second MCS field is smaller than the number of information bits of the first MCS field. The device according to any one of claims 53 to 55, wherein the device further comprises: a determining unit, configured to determine, according to a preset mapping relationship, a mapping of a transport block to a codeword before the receiving unit receives the PDSCH sent by the network device according to the scheduling information; The preset mapping relationship is: When the PDSCH is transmitted by using two transport blocks, the first transport block corresponds to codeword 0 and the second transport block corresponds to codeword 1, or the second transport block corresponds to codeword 0 and the first transport block corresponds to codeword 1; When the PDSCH is transmitted by using the first transport block, the first transport block corresponds to codeword 0; When the PDSCH is transmitted by using the second transport block, the second transport block corresponds to codeword 0. The apparatus according to any one of claims 53 to 55, wherein the DCI comprises a transport block to a codeword exchange identifier field; And the acquiring unit is configured to determine, according to the transport block to the codeword exchange identifier field, a mapping relationship between the transport block and the codeword. The device according to any one of claims 53 to 57, wherein the device further comprises: a determining unit, configured to determine, by the receiving unit, that the PDSCH transmission scheme is a large delay cyclic delay diversity before receiving the PDSCH sent by the network device according to the scheduling information, and determining that the PDSCH transmission adopts two Transmitting antenna. The apparatus according to any one of claims 53 to 57, wherein said DCI comprises a precoding information field; The acquiring unit is configured to determine a layer number according to the precoding information field. The apparatus according to any one of claims 53 to 59, wherein the DCI comprises a transmission scheme identification field; The acquiring unit is configured to determine, according to the transmission scheme identifier field, that the transmission scheme of the PDSCH is a large delay cyclic delay diversity or a transmit diversity. The apparatus according to any one of claims 53 to 60, wherein the DCI comprises a resource block allocation field, and the resource block allocation field comprises a bitmap; The acquiring unit is configured to determine, according to the bitmap, at least one resource block group RBG that is allocated, where one RBG is composed of Q consecutive LVRBs, where Q is an integer greater than P, P=1, 2, 3 Or 4. The apparatus according to any one of claims 53 to 60, wherein the DCI comprises a resource block allocation domain; And the acquiring unit is configured to determine, according to the resource block allocation domain, the allocated LVRB, where the LVRB is located in one RBG subset, and the RBG subset is one of the Q RBG subsets, where Q is an integer greater than P , P = 1, 2, 3 or 4. The apparatus according to any one of claims 53 to 60, wherein the DCI comprises a resource block allocation domain; The acquiring unit is configured to determine two resource block sets according to the resource block allocation domain, where each of the resource block sets includes one or more consecutive RBGs, and one RBG is composed of P consecutive LVRBs, where P= 1, 2, 3 or 4. The apparatus according to any one of claims 53 to 60, wherein the DCI comprises a resource block allocation domain; The device also includes: a determining unit, configured to determine an available transmission bandwidth, where the available transmission bandwidth is smaller than a downlink system bandwidth, before the acquiring unit acquires scheduling information for the PDSCH transmission from the DCI; And the acquiring unit is configured to determine, according to the resource block allocation domain, the allocated at least one resource block, where the allocated at least one resource block is located in the available transmission bandwidth. The device according to any one of claims 61 to 64, wherein the DCI further comprises a resource allocation mode identification field; The acquiring unit is configured to determine, according to the resource allocation manner identifier field, that the resource allocation manner is a continuous resource block allocation or a discontinuous resource block allocation. A device according to any one of claims 53 to 65, wherein The receiving unit is configured to determine a search space, where the search space is CSS and/or GSS, The CSS is composed of the first 16 CCEs in the downlink control region, and the GSS is composed of N CCEs other than the first 16 CCEs in the downlink control region, and N is a positive integer greater than 1. The receiving unit is further configured to acquire the DCI in the search space. The device according to claim 66, wherein the GSS and the CSS are continuously distributed, and the number of CCEs included in the GSS is:

Where i=0,...,L-1,

The number of candidate PDCCHs in the GSS when the aggregation level is L,

When the aggregation level is L, the number of candidate PDCCHs in the CSS, N _CCE,k is the number of CCEs on the subframe k, and L is 4 or 8. The device according to claim 66, wherein the GSS is determined according to a cell radio network temporary identifier G-NRT1, and the number of CCEs included in the GSS is;

Where i=0,...,L-1,

When the aggregation level is L, the number of candidate PDCCHs in the GSS, Y _k = (A·Y _k-1 ) modD, Y _-1 = n _RNT1 ≠ 0, A = 39827, D = 65537, n _s is the slot number of a radio frame, n _RNT1 is the G-NRT1 value, and L is 4 or 8. Apparatus according to any one of claims 66 to 68, wherein The receiving unit is configured to detect a GSS on the first subframe set, where the subframe in the first subframe set satisfies (10×n _f +n _sbf −n _OFFSET ) modM=0, where n _f represents a system Frame number, n _sbf indicates the subframe number, and n _OFFSET indicates the offset subframe number. A terminal device includes a processor, a memory, and a receiver, wherein the memory stores a set of program codes, and the processor calls program code stored in the memory to perform the following operations: Receiving, by the receiver, a DCI sent by the network device, where the number of information bits of the DCI is the same as the number of information bits of the DCI format 1A; Obtaining scheduling information for PDSCH transmission from the DCI, where the PDSCH transmission is adopted Large delay cyclic delay diversity transmission mode and/or discontinuous resource block allocation mode; Receiving, by the receiver, the PDSCH sent by the network device according to the scheduling information. A transmission system for control information, comprising: a transmission device for controlling information according to any one of claims 35 to 51; and a transmission device for controlling information according to any one of claims 53 to 69.

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