WO2014082195A1 - Data transmission method, apparatus, network device and ue - Google Patents

Abstract

A data transmission method, an apparatus, a network device and a user equipment (UE). The method comprises: a network device generates control information, wherein the control information binds a group of UEs with resources therein, and the group of UEs comprises at least two UEs (101); transmitting the control information so that the group of UEs performs data transmission through the resources in the control information (102). The control information can schedule a group of UEs, thus saving a large number of control channel resources. Especially for scheduling MTC UEs used for transmitting small data packets, a capability of scheduling a group of UEs enables each downlink control channel (PDCCH) to schedule multiple physical uplink shared channel (PUSCH) resources of transmission data, which improves utilization of system frequency spectrum resources.

Description

 Data transmission method, device, network device and UE

TECHNICAL FIELD The present invention relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, network device, and user equipment.

(User Equipment, UE). Background technique

 Machine to Machine (M2M) technology is a network that connects items to the Internet through information sensing devices for intelligent identification and management. M2M is larger than the current Internet and can be widely used in various fields such as smart grid, intelligent transportation, environmental protection, and smart home. When the Internet of Things and the wireless communication technology are combined, the Machine Type Communication (MTC) server in the M2M can obtain the application data of each MTC UE in the M2M through the wireless communication technology, and uniformly report the application data to the control center. . The application data is from the MTC UEs in various specific applications, and may include a smart meter reading terminal, a vending machine terminal, a point of sale (POSS) machine, etc., and the application data is usually in a random reporting manner or a periodic reporting manner. Report to the control center.

 According to the characteristics of the application data reported by the MTC UE in the M2M, in an M2M, the MTC UEs with the same performance included have the same service performance, and the data amount of the data packet reported by each MTC UE to the MTC server each time. Smaller. For example, the smart meter reading service may include 30,000 MTC UEs with the same performance in a cell. These MTC UEs periodically report the power consumption to the MTC server, and the amount of data reported each time is between 50 and 2000 bytes.

During the research of the prior art, the inventor has found that the network side needs to configure a physical downlink control channel (PDCCH) resource for each MTC UE when scheduling a large number of MTC UEs that upload small data packets. For carrying the control information, the physical uplink shared channel (PUSCH) resource used by the MTC UE to upload data is used. When the number of MTC UEs included in one cell is large, a large number of MTC UEs need to be configured for scheduling. The PDCCH resource, because the amount of data of each MTC UE uploading a data packet is small, so that the resources of the PUSCH transmitting the data are difficult to be occupied, and since the PDCCH resources are almost exhausted when scheduling these MTC UEs, it is also difficult to schedule the ordinary UE. The data is uploaded through the unfilled PUSCH, resulting in lower system spectrum resource utilization. Summary of the invention

 The embodiments of the present invention provide a data transmission method, apparatus, network device, and UE, to solve the problem of low spectrum utilization when scheduling MTC UEs for transmitting small data packets in the prior art.

 In order to solve the above technical problem, the embodiment of the present invention discloses the following technical solutions:

 In a first aspect, a data transmission method is provided, where the method includes:

 The network device generates control information, where the control information is bound to a group of UEs, and the group of UEs includes at least two UEs;

 Transmitting the control information to cause the group of UEs to perform data transmission by using resources in the control information. With reference to the first aspect, in a first possible implementation manner, a group of UEs are bound to resources by using at least one of the following manners:

 Binding a group of UEs with time domain resources;

 Binding a group of UEs with frequency domain resources;

 Bind a group of UEs to code resources.

 With reference to the first aspect, or the first possible implementation manner, in the second possible implementation manner, the binding of a group of UEs to resources is specifically:

 A group of UEs is bound to resources by using bitmap bitmap information, and each bit in the bitmap information indicates whether one UE is scheduled and resources allocated for one UE scheduled.

 With reference to the first aspect, or the first possible implementation manner, or the second possible implementation manner, in a third possible implementation, before the network device generates the control information, the method further includes: acquiring the group a group identifier of the UE, and a correspondence between each UE and the resource in the group of UEs, where the group identifier is used to scramble the cyclic redundancy check code CRC of the control information;

 The binding of the group of UEs to the resources is specifically: binding the group of UEs to resources according to the correspondence between each UE and the resources in the group of UEs.

 In a second aspect, another data transmission method is provided, and the method includes:

 The UE receives control information, where the control information binds a group of UEs to resources, and the group of UEs includes at least two UEs;

 And when the UE determines to belong to the group of UEs, performing data transmission according to the resources configured in the control information for the UE.

 With reference to the second aspect, in a first possible implementation manner, a group of UEs is bound to resources by using at least one of the following manners:

Bind a group of UEs with time domain resources; Binding a group of UEs with frequency domain resources;

 Bind a group of UEs to code resources.

 With reference to the second aspect, or the first possible implementation manner, in a second possible implementation manner, the binding, by the group of the UE, the resource is performed by using a bitmap bitmap information and a resource. Binding, each bit in the bitmap information indicates whether a UE is scheduled, and resources allocated for the one UE scheduled.

 With reference to the second possible implementation manner, in a third possible implementation manner, the method further includes: acquiring, by the UE, a group identifier of a group of UEs to which the UE belongs, and a correspondence between the UE and a resource ;

 The control information is specifically: control information that is scrambled by the group identifier of the group of UEs to which the UE belongs; the determining that the UE belongs to the group of UEs includes: the UE is a group of UEs to which the UE belongs After the group identifier descrambles the control information, it is determined that it belongs to the group of UEs.

 With reference to the third possible implementation manner, in a fourth possible implementation, the performing data transmission according to the resource configured by the UE in the control information includes:

 And acquiring, by the UE, a bit corresponding to the UE in the bitmap information according to the correspondence between the UE and the resource;

 When the bit corresponding to the UE indicates that the UE is scheduled, the UE performs data transmission according to the resource indicated by the bit.

 In a third aspect, a data transmission apparatus is provided, where the apparatus includes:

 a generating unit, configured to generate control information, where the control information is used to bind a group of UEs to a resource, where the group of UEs includes at least two UEs;

 And a transmission unit, configured to transmit control information generated by the generating unit, to enable the group of UEs to perform data transmission by using resources in the control information.

 With reference to the third aspect, in a first possible implementation manner, the generating unit is specifically configured to: in the generated control information, bind a group of UEs and resources by using at least one of the following manners: The group UE is bound to the time domain resource; the group of UEs is bound to the frequency domain resource; and the group of UEs is bound to the code resource.

 With reference to the third aspect, or the first possible implementation manner, in a second possible implementation, the generating unit is specifically configured to: in the generated control information, pass a group of UEs through bitmap bitmap information and resources. Binding is performed, each bit in the bitmap information indicating whether one UE is scheduled, and resources allocated for one UE scheduled.

With reference to the third aspect, or the first possible implementation manner, or the second possible implementation manner, in a third possible implementation manner, the network device further includes: And an acquiring unit, configured to acquire, before the generating unit generates the control information, a group identifier of the group of UEs, and a correspondence between each UE and the resources in the group of UEs, where the group identifier is used to The cyclic redundancy check code CRC of the control information is scrambled;

 The generating unit is specifically configured to bind the group of UEs and resources according to a correspondence between each UE and a resource in the group of UEs when generating control information.

 A fourth aspect provides a network device, where the network device includes:

 a processor, configured to generate control information, where the control information is used to bind a group of UEs to a resource, where the group of UEs includes at least two UEs;

 And a wireless transceiver, configured to transmit control information generated by the processor, to enable the group of UEs to perform data transmission by using resources in the control information.

 With reference to the fourth aspect, in a first possible implementation manner, the processor is specifically configured to: in the generated control information, bind a group of UEs to resources by using at least one of the following manners: The group UE is bound to the time domain resource; the group of UEs is bound to the frequency domain resource; and the group of UEs is bound to the code resource.

 With reference to the fourth aspect, or the first possible implementation manner, in a second possible implementation, the processor is specifically configured to: in the generated control information, pass a group of UEs through bitmap bitmap information and resources. Binding is performed, each bit in the bitmap information indicating whether one UE is scheduled, and resources allocated for one UE scheduled.

 With reference to the fourth aspect, or the first possible implementation manner, or the second possible implementation manner, in a third possible implementation manner, the processor is further configured to acquire the foregoing before generating the control information. a group identifier of a group of UEs, and a correspondence between each UE and resources in the group of UEs, where the group identifier is used to scramble the cyclic redundancy check code CRC of the control information.

 A fifth aspect provides a data transmission apparatus, where the apparatus includes:

 a receiving unit, configured to receive control information, where the control information binds a group of UEs to a resource, where the group of UEs includes at least two UEs;

 a determining unit, configured to determine whether the UE belongs to a group of UEs included in control information received by the receiving unit;

 And a transmitting unit, configured to: when the determining unit determines that the UE belongs to the group of UEs, perform data transmission according to the resource configured in the control information for the UE.

With reference to the fifth aspect, in a first possible implementation manner, in the control information received by the receiving unit, a group of UEs are bound to resources by using at least one of the following methods: The domain resource is bound; the group of UEs is bound to the frequency domain resource; and the group of UEs is bound to the code resource. With reference to the fifth aspect, or the first possible implementation manner, in a second possible implementation manner, in the control information received by the receiving unit, a group of UEs are bound to resources by using bitmap bitmap information, Each bit in the bitmap information indicates whether a UE is scheduled and resources allocated for the one UE being scheduled.

 With reference to the second possible implementation manner, in a third possible implementation manner, the UE further includes: an acquiring unit, configured to acquire a group identifier of a group of UEs to which the UE belongs, and the UE and the resource Correspondence relationship

 The control information received by the receiving unit is specifically control information that is scrambled by a group identifier of a group of UEs to which the UE belongs;

 The determining unit is specifically configured to determine, by the group identifier of the group of UEs to which the UE belongs, descramble the control information received by the receiving unit, and determine that the group belongs to the group of UEs.

 With reference to the third possible implementation manner, in a fourth possible implementation manner, the transmitting unit includes: an acquiring subunit, configured to acquire, according to the correspondence between the UE and the resource, the bitmap information received by the receiving unit. a bit corresponding to the UE;

 And a transmitting subunit, configured to: when the bit acquired by the acquiring subunit indicates that the UE is scheduled, perform data transmission according to the resource indicated by the bit.

 A sixth aspect, a UE is provided, where the UE includes:

 a wireless transceiver, configured to receive control information, the control information binding a group of UEs to a resource, where the group of UEs includes at least two UEs;

 a processor, configured to determine whether the UE belongs to a group of UEs included in control information received by the wireless transceiver;

 The wireless transceiver is further configured to: when the processor determines that the UE belongs to the group of UEs, perform data transmission according to resources configured by the UE in the control information.

 With reference to the sixth aspect, in a first possible implementation manner, in the control information received by the wireless transceiver, a group of UEs are bound to resources by using at least one of the following methods: The UE is bound to the time domain resource; the group of UEs is bound to the frequency domain resource; and the group of UEs is bound to the code resource.

 With reference to the sixth aspect, or the first possible implementation manner, in a second possible implementation manner, in the control information received by the wireless transceiver, a group of UEs are bound to resources by using bitmap bitmap information And, each bit in the bitmap information indicates whether a UE is scheduled, and resources allocated for the one UE scheduled.

In combination with the second possible implementation manner, in a third possible implementation manner, the processor is further used to Obtaining a group identifier of a group of UEs to which the UE belongs, and a correspondence between the UE and a resource;

 The control information received by the wireless transceiver is specifically control information that is scrambled by a group identifier of a group of UEs to which the UE belongs;

 The processor is specifically configured to determine, by the group identifier of the group of UEs to which the UE belongs, descramble the control information received by the wireless transceiver, and determine that the group belongs to the group of UEs.

 In the embodiment of the present invention, the network device generates control information, where a group of UEs including at least two UEs are bound to resources, and the control information is transmitted, and a group of UEs are scheduled to enable the group of UEs. Data transmission is performed by resources in the control information. The control information in the embodiment of the present invention can be used to schedule a group of UEs. For one PDCCH, it can be used to schedule a group of UEs. Compared with the existing one PDCCH, only one UE can be scheduled, which saves a lot of PDCCH resources, especially For scheduling MTC UEs for transmitting small data packets, since a group of UEs can be scheduled, for example, each PDCCH can schedule multiple PUSCH resources for transmitting data, thereby improving utilization of system spectrum resources. 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 or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

 1 is a flow chart of an embodiment of a data transmission method according to the present invention;

 2 is a flow chart of another embodiment of a data transmission method according to the present invention;

 3A is a flow chart of another embodiment of a data transmission method according to the present invention;

 3B is a schematic diagram of a time domain resource configuration for scheduling a group of UEs for uplink transmission in FIG. 3A; FIG. 4A is a flowchart of another embodiment of a data transmission method according to the present invention;

 4B is a schematic diagram of a time domain resource configuration for scheduling a group of UEs for uplink transmission in FIG. 4A; FIG. 5A is a flowchart of another embodiment of a data transmission method according to the present invention;

 5B is a schematic diagram of a time-frequency resource configuration for scheduling a group of UEs for uplink transmission in FIG. 5A; FIG. 6 is a block diagram of an embodiment of a data transmission apparatus according to the present invention;

 Figure 7 is a block diagram of another embodiment of a data transmission device of the present invention;

 8 is a block diagram of an embodiment of a network device of the present invention;

 9 is a block diagram of another embodiment of a data transmission device of the present invention;

Figure 10 is a block diagram of another embodiment of a data transmission device of the present invention; 11 is a block diagram of an embodiment of a UE of the present invention. detailed description

 The following embodiments of the present invention provide a data transmission method, apparatus, network device, and UE.

 The above-mentioned objects, features, and advantages of the embodiments of the present invention will become more apparent and understood. Give further details.

 Referring to FIG. 1, which is a flowchart of an embodiment of a data transmission method according to the present invention, the embodiment describes a process of scheduling a UE from a network device side:

 Step 101: The network device generates control information, where the group of UEs is bound to resources, and the group of UEs includes at least two UEs.

 In this embodiment, the network device may be a base station, or a Mobi Le Management Entity (MME). The resources in this embodiment mainly refer to scheduling resources used to schedule a group of UEs.

 In this embodiment, a group of UEs may be scheduled by each control information, where a group of UEs is bound to resources. Optionally, in the control information, according to different resource types, a group of UEs may be bound to resources by using at least one of the following methods: binding a group of UEs with time domain resources; Bind with frequency domain resources; bind a group of UEs to code resources. For the LTE communication system, when a group of UEs is bound to a time domain resource, and/or a group of UEs is bound to a frequency domain resource, the PDCCH resource may be saved.

 Optionally, the network device may obtain a group identifier of each group of UEs in the network, and a correspondence between each UE and resources in each group of UEs, and generate the control information according to the correspondence. The group identifier of each group of UEs may be used to scramble the control information of the group of UEs.

 Optionally, in the control information, whether the bound resource is a time domain resource, a frequency domain resource, a code resource, or a time-frequency resource, the UE may be bound to the resource by using a bitmap (bitmap) information. , where each bit in the bitmap information indicates whether one UE is scheduled, and resources allocated for one UE scheduled.

 In this embodiment, optionally, the control information may be control information used to schedule the group of UEs to perform uplink data transmission; or may be control information used to schedule the group of UEs to perform downlink data reception. .

 Step 102: Transmit the control information, so that the group of UEs performs data transmission by using resources in the control information.

As can be seen from the foregoing embodiment, the control information in the embodiment of the present invention can be used to schedule a group of UEs. For one PDCCH, it can be used to schedule a group of UEs. Compared with an existing PDCCH, only one UE can be scheduled. Saving a large amount of PDCCH resources, especially for scheduling MTC UEs for transmitting small data packets, since a group of UEs can be scheduled, for example, each PDCCH can schedule multiple PUSCH resources for transmitting data, thereby improving system spectrum resources. Utilization. Referring to FIG. 2, it is a flowchart of another embodiment of a data transmission method according to the present invention. This embodiment describes a process of scheduling a UE from a UE side:

 Step 201: The UE receives control information, where the group of UEs is bound to resources, and the group of UEs includes at least two UEs.

 In this embodiment, a group of UEs may be scheduled by each control information, where a group of UEs is bound to resources. Optionally, in the control information, according to different resource types, a group of UEs may be bound to resources by using at least one of the following methods: binding a group of UEs with time domain resources; Bind with frequency domain resources; bind a group of UEs to code resources. For the LTE communication system, when a group of UEs is bound to a time domain resource, and/or a group of UEs is bound to a frequency domain resource, the PDCCH resource may be saved.

 Optionally, the UE may obtain a group identifier of a group of UEs to which the UE belongs, and a corresponding relationship between the UE and the resource. The UE may descramble the control information by using the group identifier of the group of UEs to which the UE belongs when receiving the scrambled control information, and obtain the UE as the UE by using the correspondence between the UE and the resource. Configured resources.

 Optionally, in the control information, whether the bound resource is a time domain resource, a frequency domain resource, a code resource, or a time-frequency resource, the UE may be bound to the resource by using the bitmap information, where the bitmap information is Each bit indicates whether one UE is scheduled and resources allocated for one UE being scheduled.

 Step 202: When the UE determines to belong to the group of UEs, perform data transmission according to resources configured for the UE in the control information.

 Optionally, the UE may perform uplink data transmission according to the resource configured for the UE in the control information. Alternatively, the UE may perform downlink data reception according to the resource configured by the UE in the control information.

It can be seen that the control information in the embodiment of the present invention can be used to schedule a group of UEs. For one PDCCH, it can be used to schedule a group of UEs. Compared with the existing one PDCCH, only one UE can be scheduled. A large number of PDCCH resources, especially for scheduling MTC UEs for transmitting small data packets, since a group of UEs can be scheduled, for example, each PDCCH can schedule multiple PUSCH resources for transmitting data, thereby improving system spectrum resources. Utilization rate. The embodiments of the data transmission method of the present invention will be described in detail below with reference to several application examples.

 Referring to FIG. 3A, it is a flowchart of another embodiment of a data transmission method according to the present invention. The embodiment shows a process of scheduling a group of UEs by using time domain resources:

 Step 301: The network device acquires a group identifier of each group of UEs in the network, and a correspondence between the UE and the bitmap in each group of UEs, and each UE acquires a group identifier of a group of UEs to which the UE belongs, and the UE Correspondence with bitmap.

 In this embodiment, the network device may be a base station (eNodeB, eNB), or an MME or the like. The group identifier may be a Group-Radio Network Temporary Identity (Group-RNTI), or may be a fixed Group-RNTI, or may be one of a group of UEs. Cell radio network temporary identifier (Cel lRadioNetworkTemporaryldentifier, C_RNTI). The corresponding relationship between the UE and the bitmap may be that the network device notifies the UE, for example, notifying the UE of a UE number in the group to which the UE belongs; or using a certain rule to indicate, for example, after the C-RNTI of the UE is modulo 8 If it is 0, it corresponds to the first bit in the bitmap. If it is modulo, it corresponds to the second bit in the bitmap, and so on.

 In this embodiment, the network device is notified to the UE that the UE number in the group belongs to the UE. Assume that each group of UEs includes eight UEs, and a group of UEs to be scheduled is taken as an example. The group identifier is the first group-RNTI, and the number of the eight UEs in the group of UEs is UE0, UE1, UE2, UE3, UE4, UE5, UE6, and UE7.

 Step 302: When the network device is to schedule a group of UEs, generate control information for the group of UEs, where the control information is bound to the time domain resources by using the bitmap information.

 In this embodiment, the control information may be downlink control information for scheduling the uplink data transmission by the group of UEs, or may be downlink control information for scheduling the downlink data reception by the group of UEs. The control information may be specifically Down Control Information (DCI).

For example, in the embodiment, the generated DCI may be used to carry the bitmap information, where the bitmap information is used to indicate the UE in the group of UEs to be scheduled, and to allocate the UE to be scheduled. The time domain resource, usually the bitmap information contains the same number of bits as the UEs included in the group of UEs. FIG. 3B is a schematic diagram of a time domain resource configuration for scheduling a group of UEs for uplink transmission according to the embodiment. In FIG. 3B, the bitmap information included in the DCI is “10111011”, and each bit sequence in the bitmap information is used. Corresponding to the eight UEs sequentially numbered in a group of UEs, that is, the bit corresponding to UE0 is "1", the bit corresponding to UE1 is "0", the bit corresponding to UE2 is "1", and the bit corresponding to UE3 is "1", UE4 The corresponding bit is "1", the bit corresponding to UE5 is "0", the bit corresponding to UE6 is "1", and the bit corresponding to UE7 is "1". Ben In the embodiment, if the bit in the bitmap information is "1", it indicates that the corresponding UE is scheduled. When the bit in the bitmap information is "0", it means that the corresponding UE does not need to be scheduled, as shown in FIG. 3B, the bit corresponding to UE0. It is "1", indicating that UE0 needs to be scheduled, and the bit corresponding to UE1 is "0", indicating that UE1 does not need to be scheduled.

 Each bit in the above bitmap information further indicates a time domain resource corresponding to the UE to be scheduled, in addition to indicating whether to schedule the corresponding UE. As shown in FIG. 3B, assuming that the DCI is transmitted on the Nth subframe, when performing uplink scheduling, the UEs with the sequential number in a group of UEs can usually start scheduling from the N+4 subframes, that is, the scheduling subframe corresponding to UE0. For "N+4", the scheduling subframe corresponding to UE1 is "N+5", the scheduling subframe corresponding to UE2 is "N+6", and the scheduling subframe corresponding to UE3 is "N+7", and the scheduling corresponding to UE4 The subframe is "N+8", the scheduling subframe corresponding to UE5 is "N+9", the scheduling subframe corresponding to UE6 is "N+10", and the scheduling subframe corresponding to UE7 is "N+ll". As shown in FIG. 3B, the bit corresponding to UE0 is “1”, which indicates that UE0 needs to be scheduled, and the corresponding subframe of UE0 is “N+4”, and UEO is scheduled from the N+4th subframe.

 In addition, in this embodiment, when the DCI is used to schedule a group of UEs for uplink data transmission, the DCI may include at least one of the following information in addition to the bitmap information used to schedule a group of UEs:

 Configuration information of the frequency domain resource: In this embodiment, when scheduling a group of UEs, each UE in the group of UEs corresponds to a different subframe in the time domain, so in the frequency domain, a group of UEs can be configured. Each of the UEs is transmitted on the same frequency domain resource, and the frequency domain resource may be a physical resource block (PRB). The configuration information of the frequency domain resource may multiplex the existing frequency domain resource allocation indication method, or may only inform the starting position of the frequency domain resource allocation in the DCI to save the transmission bit, such as the starting position of the PRB allocated to ■ For the 13th PRB, and each UE is allocated two PRBs, 5 bits are needed to indicate the starting position of the PRB, and the number of PRBs allocated for each UE may be through higher layer signaling or a preset manner. The configuration may also indicate the number of PRBs occupied by each UE in the DCI. For example, the bit "1" indicates that two PRBs are occupied, and the bit "0" indicates that three PRBs are occupied. The foregoing describes only the configuration of the frequency domain resource, and is not used to limit the DCI in the embodiment of the present invention;

 Modulation coding mode and redundancy version information: the existing modulation coding mode can be multiplexed to indicate the modulation coding mode and the redundancy version in the DCI; or, several bits can be used to represent the modulation of one UE to be scheduled in a group of UEs. The coding mode and the redundancy version, and the modulation coding mode and the redundancy version of other UEs may be represented by the modulation coding mode and the redundancy version offset of the above-mentioned one to be scheduled UE; When the redundancy version information is configured through a high-level signaling configuration or a preset manner, the modulation and coding mode and the redundancy version information may be omitted in the DCI to save the DCI bit;

New data indicator indication information: the new data transmission indication information is used to indicate that the UE in a group of UEs is to schedule newly transmitted data, or to schedule retransmitted data, the new data transmission indication information. It can be indicated by lbit information. It should be noted that, when scheduling DCI of a group of UEs is only used to schedule newly transmitted data, the information may be omitted;

 The TPC command for PUSCH: The information can be multiplexed in the prior art and indicated in the DCI. It should be noted that when the TPC command for PUSCH is configured through high layer signaling or When the configuration mode is configured, the TPC command for PUSCH can be omitted in the DCI to save the DCI bit.

 Cyclic Shift for DMRS and OCC index: This information can be multiplexed in the prior art and indicated in the DCI; it should be noted that when Cyclic When the Shift for DMRS and OCC index is configured through high-level signaling configuration or preset mode, the Cyclic Shift for DMRS and OCC index can be omitted in the DCI to save the DCI bit.

 Similar to the DCI that schedules a group of UEs to perform uplink data transmission, as shown in FIG. 3B, when scheduling a group of UEs for downlink data reception, DCI shown in this embodiment may also be used for downlink scheduling, which is different from FIG. 3B. The subframe allocated for the first UE in the DCI scheduled by the DCI may start from the Nth subframe in which the DCI is transmitted, that is, the scheduling subframe corresponding to UE0 is "N". .

 In addition, the DCI may further include information similar to the information included in the foregoing DCI for scheduling a group of UEs for uplink data transmission, where the difference is that the DCI that schedules a group of UEs for downlink data reception does not include the TPC command for The PUSCH and the Cyclic Shift for DMRS and OCC index, but include the PUCCH transmission power control request information (TPC command for PUCCH), and may further include a HARQ process number.

 The setting of the TPC command for PUCCH may be similar to the TPC command for PUSCH when scheduling uplink data. The HARQ process number can be set as follows: Set the number of HARQ processes of the UE to be less than 8. For example, you can set the number of HARQ processes to 4, and use 2 bits to represent the HARQ process of the scheduled UE. Alternatively, you can use 2 to 3. The bit indicates the HARQ process of one UE that is scheduled. The HARQ process of the other scheduled UEs can offset the number of HARQ processes of the one UE. If a group of UEs only uses one process, the HARQ process number can be omitted. Save DCI bits.

 Step 303: The network device scrambles the generated control information by using the group identifier of the group of UEs. In this embodiment, after the DCI is generated, the DCI may be scrambled by the first group-RNTI of the group identity of the group of UEs. Among them, the DCI scrambling mainly refers to scrambling the DCI Cyclic Redundancy Check (CRC).

Step 304: The network device transmits the scrambled control information through the PDCCH. Step 305: After receiving the control information, the UE descrambles the control information by using the group identifier of the group of UEs to which the UE belongs, and determines that the UE belongs to the group of UEs.

 When the network device transmits the scrambled control information through the PDCCH, all the UEs in the network receive the control information, so each UE can descramble the control information according to the group identifier of the group of UEs. If the descrambling is successful, Then it can be determined that the UE belongs to a group of UEs to be scheduled.

 Step 306: The UE acquires a bit corresponding to the UE in the bitmap information according to the correspondence between the UE and the resource.

 Still referring to FIG. 3B, it is assumed that the UE that receives the control information is ■, then ■ after the descrambling of the received DCI by the first Group-RNTI is successful, the bitmap information "10111011" is obtained, and the UE0 is based on its own intra-group number. UE0 "obtains the corresponding bit in the bitmap information as the first bit "1", so that UE0 is scheduled, and the corresponding scheduling subframe is subframe N+4; if the UE receiving the control information is UE1, then UE1 After the first group-RNTI successfully descrambles the received DCI, the bitmap information "10111011" is obtained, and the UE1 obtains the corresponding bit in the bitmap information according to its own intra-group number "UE1" as the second bit "0". This shows that UE1 is not scheduled.

 Step 307: When a bit corresponding to the UE indicates that the UE is scheduled, the UE performs data transmission according to the time domain resource indicated by the bit.

 Referring to FIG. 3B, UE0 is still taken as an example, and UE0 performs uplink data transmission on the N+4th subframe according to the received DCI.

 It can be seen from the foregoing embodiment that, in this embodiment, a group of UEs can be scheduled by using control information, that is, each PDCCH can be used to schedule a group of UEs, and a large number of PDCCH resources are saved compared with an existing PDCCH that can only schedule one UE. In particular, for scheduling an MTC UE for transmitting small data packets, since each PDCCH can schedule a group of UEs, it is equivalent to scheduling multiple PUSCH resources for each PDCCH, thereby improving the utilization of system spectrum resources. rate. Referring to FIG. 4, it is a flowchart of another embodiment of a data transmission method according to the present invention. The embodiment shows a process of scheduling a group of UEs by using frequency domain resources:

 Step 401: The network device acquires a group identifier of each group of UEs in the network, and a correspondence between a UE and a bitmap in each group of UEs, and each UE acquires a group identifier of a group of UEs to which the UE belongs, and the UE Correspondence with bitmap.

In this embodiment, the network device may be a base station (eNB), or an MME. The group identifier may be a group-Radio Network Temporary Identity (Group-Radio Network Temporary Identity) allocated by the eNB. The group-RNTI may be a fixed Group-RNTI or a Cell Radio Network Temporary Identifier (C-RNTI) of one of the UEs. The corresponding relationship between the UE and the bitmap may be that the network device notifies the UE, for example, notifying the UE of a UE number in the group to which the UE belongs; or using a certain rule to indicate, for example, after the C-RNTI of the UE is modulo 8 If it is 0, it corresponds to the first bit in the bitmap. If it is modulo, it corresponds to the second bit in the bitmap, and so on.

 In this embodiment, it is still assumed that each group of UEs includes eight UEs, and a group of UEs to be scheduled is taken as an example, and the group identifier of the group of UEs is assumed to be the first Group-RNTI, and eight of the group of UEs. The numbers of the UEs are UE0, UE1, UE2, UE3, UE4, UE5, UE6, and UE7.

 Step 402: When the network device is to schedule a group of UEs, generate control information for the group of UEs, where the control information is used to bind the group of UEs to the frequency domain resources by using bitmap information.

 In this embodiment, the control information may be downlink control information for scheduling the uplink data transmission by the group of UEs, or may be downlink control information for scheduling the downlink data reception by the group of UEs. The control information may be specifically a DCI.

 For example, in the embodiment, the generated DCI may be used to carry the bitmap information, where the bitmap information is used to indicate the UE in the group of UEs to be scheduled, and the UE to be scheduled. The allocated frequency domain resources, usually the bitmap information contains the same number of bits as the UEs included in the group of UEs. FIG. 4B is a schematic diagram of a frequency domain resource configuration for scheduling a group of UEs for uplink transmission according to the embodiment;

 In FIG. 4B, the bitmap information included in the DCI is "10111011", and each bit in the bitmap information corresponds to eight UEs sequentially numbered in a group of UEs, that is, the bit corresponding to UE0 is "1", corresponding to UE1. The bit is "0", the bit corresponding to UE2 is "1", the bit corresponding to UE3 is "1", the bit corresponding to UE4 is "1", the bit corresponding to UE5 is "0", and the bit corresponding to UE6 is "1". The bit corresponding to UE7 is "1". In this embodiment, if the bit in the bitmap information is "1", it indicates that the corresponding UE is scheduled. When the bit in the bitmap information is "0", it means that the corresponding UE does not need to be scheduled. As shown in FIG. 4B, UE0 corresponds to The bit is "1", indicating that UE0 needs to be scheduled, and the bit corresponding to UE1 is "0", indicating that UE1 does not need to be scheduled.

Each bit in the above bitmap information further indicates a frequency domain resource corresponding to the UE to be scheduled, in addition to indicating whether to schedule the corresponding UE. In this embodiment, a group of UEs are scheduled on the same time domain resource. For example, when the subframe in which the DCI is transmitted is the Nth subframe, the group of UEs is scheduled on the N+4th subframe. That is, the subframe shown in FIG. 4B is the N+4th subframe. As shown in FIG. 4B, when uplink scheduling is performed, it is assumed that each UE occupies two PRBs, and the sequentially numbered UEs in a group of UEs start scheduling from the 13th PRB. The scheduling PRB corresponding to the UEO is the PRB 13 and the PRB 14, the scheduling PRB corresponding to the UE1 is the PRB 15 and the PRB 16, the scheduling PRB corresponding to the UE 2 is the PRB 17 and the PRB 18 , the scheduling PRB corresponding to the UE 3 is the PRB 19 and the PRB 20 , and the scheduling PRB corresponding to the UE 4 is the PRB 21 . The scheduling PRB corresponding to the PRB22 and the UE5 is the PRB23 and the PRB24, the scheduling PRB corresponding to the UE6 is the PRB25 and the PRB26, and the scheduling PRB corresponding to the UE7 is the PRB27 and the PRB28. As shown in FIG. 4B, the bit corresponding to UE0 is described as "1", indicating that UE0 needs to be scheduled, and the scheduling PRB corresponding to UEO is PRB13 and PRB14, that is, the 13th PRB on the "N+4" subframes. And UE0 is scheduled on the 14th PRB.

 In addition, in this embodiment, when the DCI is used to schedule a group of UEs for uplink data transmission, the DCI may include at least one of the following information in addition to the bitmap information used to schedule a group of UEs:

 Configuration information of the frequency domain resource: In this embodiment, when scheduling a group of UEs, each UE in the group of UEs is scheduled on different PRBs of the same subframe, and therefore, configuring one subframe for scheduling the UE The starting position of the PRB, in this embodiment, is the starting position of the PRB allocated to UE0. The configuration of the starting position of the PRB may multiplex the existing frequency domain resource allocation indication method, or may only inform the starting position of the frequency domain resource allocation in the DCI to save the transmission bit, such as the start of the PRB allocated to the UEO. The location is the 13th PRB, and each UE is allocated two PRBs, then 5 bits are needed to indicate the starting position of the PRB, and the number of PRBs allocated for each UE can be determined by higher layer signaling or preset The mode is configured, or the number of PRBs occupied by each UE may be indicated in the DCI. For example, the bit "1" indicates that two PRBs are occupied, and the bit "0" indicates that three PRBs are occupied. In addition, when the PRB allocated between each UE in a group of UEs is discontinuous, the DCI may further include information of PRBs between the adjacent UEs. The foregoing describes only the configuration of the frequency domain resource, and does not need to limit the DCI in the embodiment of the present invention;

 Modulation coding mode and redundancy version information: the existing modulation coding mode can be multiplexed to indicate the modulation coding mode and the redundancy version in the DCI; or, several bits can be used to represent the modulation of one UE to be scheduled in a group of UEs. The coding mode and the redundancy version, and the modulation coding mode and the redundancy version of other UEs may be represented by the modulation coding mode and the redundancy version offset of the above-mentioned one to be scheduled UE; When the redundancy version information is configured through a high-level signaling configuration or a preset manner, the modulation and coding mode and the redundancy version information may be omitted in the DCI to save the DCI bit;

 New data indicator: The new data transmission indication information is used to indicate that the UE in a group of UEs is to schedule new transmission data, or to schedule retransmitted data, and the new data transmission indication information can be indicated by using lbit information. It should be noted that, if the DCI of a group of UEs is scheduled to be used only for scheduling newly transmitted data, the information may be omitted;

TPC command for PUSCH: This information can be multiplexed in the prior art and indicated in the DCI. It should be noted that when the TPC command for PUSCH is configured through high-level signaling or preset. When the configuration is performed, the TPC command for PUSCH may be omitted in the DCI to save the DCI bit;

Cyclic Shift for DMRS and OCC index: This information can be multiplexed in the prior art and indicated in the DCI. It should be noted that when the Cyclic Shift for DMRS and OCC index is configured through high-level signaling or preset. When configuring, you can omit the Cyclic Shift for DMRS and OCC index in DCI to save DCI bits.

 In addition, when the DCI is a DCI that schedules a group of UEs to perform downlink data reception, the DCI may further include information similar to the information included in the foregoing DCI for scheduling a group of UEs for uplink data transmission, where the difference is that, The DCI that schedules a group of UEs for downlink data reception does not include the TPC command for PUSCH and the Cyclic Shift for DMRS and OCC index, but includes the transmission power control request information (TPC command for PUCCH) of the PUCCH, and may further include a HARQ process. Number.

 The setting of the TPC command for PUCCH may be similar to the TPC command for PUSCH when scheduling uplink data. The HARQ process number can be set as follows: Set the number of HARQ processes of the UE to be less than 8. For example, you can set the number of HARQ processes to 4, and use 2 bits to indicate the number of HARQ processes of the scheduled UE. Alternatively, you can use 2 to 3 bits represent the number of HARQ processes of one UE scheduled, and the HARQ process of other scheduled UEs may offset the number of HARQ processes of one UE; if a group of UEs only adopts one process, the HARQ process number may be omitted. To save the DCI bit.

 Step 403: The network device scrambles the generated control information by using the group identifier of the group of UEs. In this embodiment, after the DCI is generated, the DCI may be scrambled by the first group-RNTI of the group identity of the group of UEs. Among them, the DCI scrambling mainly refers to scrambling the DCI CRC.

 Step 404: The network device transmits the scrambled control information by using the PDCCH.

 Step 405: After receiving the control information, the UE descrambles the control information by using the group identifier of the group of UEs to which the UE belongs, and determines that the UE belongs to the group of UEs.

 When the network device transmits the scrambled control information through the PDCCH, all the UEs in the network receive the control information, so each UE can descramble the control information according to the group identifier of the group of UEs. If the descrambling is successful, Then it can be determined that the UE belongs to a group of UEs to be scheduled.

 Step 406: The UE acquires a bit corresponding to the UE in the bitmap information according to the correspondence between the UE and the resource.

As shown in FIG. 4B, it is assumed that the UE that receives the control information is ■, and UE0 obtains the bitmap information "10111011" after the descrambling of the received DCI by the first Group-RNTI, and the UE0 is based on its own intra-group number. UE0" obtains the corresponding bit in the bitmap information as the first bit "1", so that UE0 is scheduled, and the corresponding scheduling PRB is PRB13 and PRB14; it is assumed that the UE receiving the control information is UE1, After the UE1 successfully descrambles the received DCI by using the first Group-RNTI, the UE obtains the bitmap information "10111011", and the UE1 obtains the corresponding bit in the bitmap information according to its intra-group number "UE1" as the second bit "0". It can be seen that UE1 is not scheduled.

 Step 407: When a bit corresponding to the UE indicates that the UE is scheduled, the UE performs data transmission according to the frequency domain resource indicated by the bit.

 Referring to FIG. 4B, UE0 is still taken as an example, and UE0 performs uplink data transmission on PRB13 and PRB14 of the N+4th subframe according to the received DCI.

 It can be seen from the foregoing embodiment that, in this embodiment, a group of UEs can be scheduled by using control information, that is, each PDCCH can be used to schedule a group of UEs, and a large number of PDCCH resources are saved compared with an existing PDCCH that can only schedule one UE. In particular, for scheduling an MTC UE for transmitting small data packets, since each PDCCH can schedule a group of UEs, it is equivalent to scheduling multiple PUSCH resources for each PDCCH, thereby improving the utilization of system spectrum resources. rate. Referring to FIG. 5, it is a flowchart of another embodiment of a data transmission method according to the present invention. The embodiment shows a process of scheduling a group of UEs by using time-frequency resources:

 Step 501: The network device acquires a group identifier of each group of UEs in the network, and a correspondence between the UE and the bitmap in each group of UEs, and each UE acquires a group identifier of a group of UEs to which the UE belongs, and the UE Correspondence with bitmap.

 In this embodiment, the network device may be a base station (eNB), or an MME or the like. The group identifier may be a group-Radio Network Temporary Identity (Group-RNTI) assigned by the eNB, or may be a fixed Group-RNTI, or may be one of a group of UEs. Cell radio network temporary identifier (Cel radi oNe tworkTemporary Identifier, C-RNTI). The corresponding relationship between the UE and the bitmap may be that the network device notifies the UE, for example, notifying the UE of a UE number in the group to which the UE belongs; or using a certain rule to indicate, for example, after the C-RNTI of the UE is modulo 8 If it is 0, it corresponds to the first bit in the bitmap. If it is modulo, it corresponds to the second bit in the bitmap, and so on.

 In this embodiment, it is still assumed that each group of UEs includes eight UEs, and a group of UEs to be scheduled is taken as an example, and the group identifier of the group of UEs is assumed to be the first Group-RNTI, and eight of the group of UEs. The numbers of the UEs are UE0, UE1, UE2, UE3, UE4, UE5, UE6, and UE7.

Step 502: When the network device is to schedule a group of UEs, generate control information for the group of UEs, where the group of UEs is bound to the time-frequency resources by using the bitmap information. In this embodiment, the control information may be downlink control information for scheduling the uplink data transmission by the group of UEs; or may be downlink control information for scheduling the downlink data reception by the group of UEs. The control information may be specifically DCI.

 For example, in the embodiment, the generated DCI may be used to carry the bitmap information, where the bitmap information is used to indicate the UE in the group of UEs to be scheduled, and the UE to be scheduled. The allocated time-frequency resource, usually the bitmap information contains the same number of bits as the UEs included in the group of UEs. FIG. 5B is a schematic diagram of a time-frequency resource configuration for scheduling a group of UEs for uplink transmission according to the embodiment;

 In FIG. 5B, the bitmap information included in the DCI is "10111011", and each bit in the bitmap information corresponds to eight UEs sequentially numbered in a group of UEs, that is, the bit corresponding to UE0 is "1", corresponding to UE1. The bit is "0", the bit corresponding to UE2 is "1", the bit corresponding to UE3 is "1", the bit corresponding to UE4 is "1", the bit corresponding to UE5 is "0", and the bit corresponding to UE6 is "1". The bit corresponding to UE7 is "1". In this embodiment, if the bit in the bitmap information is "1", it indicates that the corresponding UE is scheduled. When the bit in the bitmap information is "0", it means that the corresponding UE does not need to be scheduled. As shown in FIG. 5B, UE0 corresponds to The bit is "1", indicating that UE0 needs to be scheduled, and the bit corresponding to UE1 is "0", indicating that UE1 does not need to be scheduled.

 Each bit in the above bitmap information further indicates a time-frequency resource corresponding to the UE to be scheduled, in addition to indicating whether to schedule the corresponding UE. In this embodiment, a group of UEs are scheduled to be scheduled on different time domain resources and frequency domain resources. For example, when the subframe in which the DCI is transmitted is the Nth subframe, the first four of the group of UEs are sequentially numbered. The UEs are scheduled on the N+4th subframe, and the last four UEs sequentially numbered in the group of UEs are scheduled on the N+5th subframe, where the scheduling is performed on the N+4th subframe. UE0 to UE3 respectively start scheduling in PRB13 of the N+4 subframes, and each UE occupies two PRBs, that is, the scheduling PRB corresponding to UE0 is PRB13 and PRB14, and the scheduling PRB corresponding to UE1 is PRB15 and PRB16, corresponding to UE2 The scheduling PRB is the PRB17 and the PRB18, and the scheduling PRB corresponding to the UE3 is the PRB19 and the PRB20. Similarly, the UE4 to the UE7 scheduled in the N+5th subframe start scheduling in the PRB13 of the N+5 subframes, respectively. The UE occupies two PRBs, that is, the scheduling PRB corresponding to UE4 is PRB13 and PRB14, the scheduling PRB corresponding to UE5 is PRB15 and PRB16, the scheduling PRB corresponding to UE6 is PRB17 and PRB18, and the scheduling PRB corresponding to UE7 is PRB19 and PRB20. As shown in FIG. 5B, it has been described above that the bit corresponding to UE0 is "1", indicating that UE0 needs to be scheduled, and the scheduling PRB corresponding to UE0 is PRB13 and PRB14 on the N+4th subframe, that is, at the "N+4" UE0 is scheduled on the 13th PRB and the 14th PRB on one subframe.

It should be noted that only one mode for configuring time-frequency resources for a group of UEs is shown in FIG. 5B, that is, the time-frequency resources are configured for a group of UEs according to the subframe number from small to large, and the PRB number is from small to large. In practical applications, The frequency domain resource PRB may be configured at equal intervals, for example, four PRBs are allocated at intervals, UE0 corresponds to PRB13 and PRB14, UE1 corresponds to PRB17 and PRB18, and UE2 corresponds to PRB21 and PRB22, etc. This embodiment is not limited.

 In addition, in this embodiment, when the DCI is used to schedule a group of UEs for uplink data transmission, the DCI may include at least one of the following information in addition to the bitmap information used to schedule a group of UEs:

 Configuration information of the frequency domain resource: In this embodiment, when scheduling a group of UEs, each UE in the group of UEs is scheduled on different PRBs of the same subframe, and therefore, configuring one subframe for scheduling the UE The starting position of the PRB, in this embodiment, is the starting position of the PRB allocated to UE0. The configuration of the starting position of the PRB may multiplex the existing frequency domain resource allocation indication method, or may only inform the starting position of the frequency domain resource allocation in the DCI to save the transmission bit, such as the start of the PRB allocated to UE0. The location is the 13th PRB, and each UE is allocated two PRBs, then 5 bits are needed to indicate the starting position of the PRB, and the number of PRBs allocated for each UE can be determined by higher layer signaling or preset The mode is configured, or the number of PRBs occupied by each UE may be indicated in the DCI. For example, the bit "1" indicates that two PRBs are occupied, and the bit "0" indicates that three PRBs are occupied. In addition, when the PRB allocated between each UE in a group of UEs is discontinuous, the DCI may further include information of PRBs between the adjacent UEs. The foregoing describes only the configuration of the frequency domain resource, and does not need to limit the DCI in the embodiment of the present invention;

 Modulation coding mode and redundancy version information: the existing modulation coding mode can be multiplexed to indicate the modulation coding mode and the redundancy version in the DCI; or, several bits can be used to represent the modulation of one UE to be scheduled in a group of UEs. The coding mode and the redundancy version, and the modulation coding mode and the redundancy version of other UEs may be represented by the modulation coding mode and the redundancy version offset of the above-mentioned one to be scheduled UE; When the redundancy version information is configured through high-level signaling configuration or preset, it can be

The modulation coding mode and the redundancy version information are omitted in the DCI to save the DCI bit;

 New data indicator: The new data transmission indication information is used to indicate that the UE in a group of UEs is to schedule new transmission data, or to schedule retransmitted data, and the new data transmission indication information can be indicated by using lbit information. It should be noted that, if the DCI of a group of UEs is scheduled to be used only for scheduling newly transmitted data, the information may be omitted;

 TPC command for PUSCH: This information can be multiplexed in the prior art, and is indicated in the DCI. It should be noted that when the TPC command for PUSCH is configured through high-level signaling configuration or preset manner, The TPC command for PUSCH is omitted in the DCI to save the DCI bit;

Cycl ic Shift for DMRS and 0CC index: This information can be multiplexed in the prior art, indicating in the DCI; it should be noted that when Cycl ic Shift for DMRS and 0CC index is When the configuration is configured in a high-level signaling configuration or in a preset manner, the Cyclic Shift for DMRS and OCC index may be omitted in the DCI to save the DCI bit.

 In addition, when the DCI is a DCI that schedules a group of UEs to perform downlink data reception, the DCI may further include information similar to the information included in the foregoing DCI for scheduling a group of UEs for uplink data transmission, where the difference is that, The DCI that schedules a group of UEs for downlink data reception does not include the TPC command for PUSCH and the Cyclic Shift for DMRS and OCC index, but includes the transmission power control request information (TPC command for PUCCH) of the PUCCH, and may further include a HARQ process. Number.

 The setting of the TPC command for PUCCH may be similar to the TPC command for PUSCH when scheduling uplink data. The HARQ process number can be set as follows: Set the number of HARQ processes of the UE to be less than 8. For example, you can set the number of HARQ processes to 4, and use 2 bits to represent the HARQ process of the scheduled UE. Alternatively, you can use 2 to 3. The bit indicates the HARQ process of one UE that is scheduled. The HARQ process of the other scheduled UEs can offset the number of HARQ processes of the one UE. If a group of UEs only uses one process, the HARQ process number can be omitted. Save DCI bits.

 Step 503: The network device scrambles the generated control information by using the group identifier of the group of UEs. In this embodiment, after the DCI is generated, the first group-RNTI pair may be identified by the group of the group of UEs.

The DCI is scrambled. Among them, the DCI scrambling mainly refers to scrambling the DCI CRC.

 Step 504: The network device transmits the scrambled control information through the PDCCH.

 Step 505: After receiving the control information, the UE descrambles the control information by using the group identifier of the group of UEs to which the UE belongs, and determines that the UE belongs to the group of UEs.

 When the network device transmits the scrambled control information through the PDCCH, all the UEs in the network receive the control information, so each UE can descramble the control information according to the group identifier of the group of UEs. If the descrambling is successful, Then it can be determined that the UE belongs to a group of UEs to be scheduled.

 Step 506: The UE acquires a bit corresponding to the UE in the bitmap information according to the correspondence between the UE and the resource.

 Still referring to FIG. 5B, it is assumed that the UE that receives the control information is ■, then ■ through the first

After the group-RNTI successfully descrambles the received DCI, the bitmap information "10111011" is obtained, and UE0 obtains the corresponding bit in the bitmap information as the first bit "1" according to its own intra-group number "UE0", thereby knowing that UE0 The UE is scheduled to be, and the corresponding resource is the PRB13 and the PRB14 in the N+4th subframe. If the UE receiving the control information is the UE1, the UE1 successfully descrambles the received DCI through the first Group-RNTI. Obtaining the bitmap information "10111011", the UE1 acquires the corresponding bit in the bitmap information according to its own intra-group number "UE1" as the second bit "0", and thus it is known that the UE1 is not scheduled. Step 507: When the bit corresponding to the UE indicates that the UE is scheduled, the UE performs data transmission according to the time-frequency resource indicated by the bit.

 Referring to FIG. 5B, UE0 is still taken as an example, and UE0 performs uplink data transmission on PRB13 and PRB14 of the N+4th subframe according to the received DCI.

 It can be seen from the above embodiment that in this embodiment, a group of UEs can be scheduled due to control information, that is, each

The PDCCH can be used to schedule a group of UEs. Compared with the existing PDCCH, only one UE can be scheduled, which saves a lot of PDCCH resources. Especially for scheduling MTC UEs for transmitting small data packets, each PDCCH can be scheduled. The UE is equivalent to each PUSCH resource that can schedule multiple transmission data, thereby improving the utilization of the system spectrum resources. In addition, applying the foregoing embodiment, when a group of UEs saves the physical resource overhead of the air interface link, or saves the RRC signaling overhead of repeatedly establishing a Radio Resource Control (RRC) connection, thereby maintaining the loss in the RRC connection state. In the step state, if the group of UEs is to be awake from the PDCCH in the out-of-synchronization state to perform uplink group synchronization, the network device may generate a control information PDCCH order, in which the group of UEs needs to be used. The non-competitive preamble (preamble), and the physical random access resource (PhysicalRandom Access Channel, PRACH) that transmits the preamble are bound by time-frequency resources.

 Taking the network device as the eNB as an example, the specific process of performing uplink group synchronization on a group of UEs may include: when the eNB determines that a group of UEs needs to use the PDCCH order to initiate uplink group synchronization, the eNB adopts the group-RNTI of the group of UEs. The DCI that transmits the PDCCH order is scrambled, where the Group-RNTI of the group of UEs can be known in advance by the eNB and the group of UEs; the DCI can reuse the DCI format of the Format 1A used by the existing PDCCH order, or can be used. a newly defined DCI format; each UE in the group of UEs receives a DCI carrying a PDCCH order according to a Group-RNTI of the group of UEs, and selects a preamble corresponding to the content according to the content indicated in the DCI. And sending a preamble on the PRACH time-frequency resource corresponding to the selected preamble, so as to start the non-contention random access process.

The DCI for performing uplink group synchronization for each group of UEs may indicate a preamble index and a PRACH mask index. After receiving a DCI, a group of UEs may start with a preamble index indicated by the DCI according to a pre-defined sequence of UEs in the group, and each UE uses a preamble corresponding to the subsequent index in a sequential or regular order, for example, a preamble. If the index is 20, assuming that there are 8 UEs in a group of UEs, the preamble index corresponding to the preambles used by the 8 UEs is 20 to 27 in sequence; or, a preamble and a PRACH mask index may be indicated. After receiving a DCI, a group of UEs may follow the pre-defined sequence of UEs in the group. The preamble is sent by using a PRACH resource indicated by the PRACH mask index in a time division manner, where two adjacent UEs may be offset at intervals.

 The two methods for carrying information in the DCI may be used in combination. For example, the UEs in a group of UEs are divided into several sub-groups according to the order, and then the UEs in each sub-group use different preambles in order, and are on the same PRACH resource. The present invention does not limit the PRACH resource interval between the different sub-groups, and the preamble can be multiplexed between the sub-groups.

 In addition, when uplink group synchronization is performed on a group of UEs, a bitmap may be included in the DCI, which is used to indicate that the UE in the group of UEs needs to be triggered to perform uplink group synchronization, and then needs to perform uplink group synchronization. The UE indicates the preamble and the PRACH resource of the preamble in the foregoing manner, which is not limited in this embodiment of the present invention. The foregoing embodiment describes a process in which a group of UEs are scheduled by using PDCCH transmission control information in an LTE system, thereby implementing a process of data transmission by a group of UEs. In addition to the implementation of binding a group of UEs to a time domain resource, a frequency domain resource, or a time-frequency resource in the foregoing control information, the embodiment of the present invention may also be applied to a code division multiple access communication system, that is, in scheduling. When a group of UEs is used, a group of UEs may be bound to a code resource, a time code resource, or a frequency code resource in the control information. The following is an example of binding a group of UEs and code resources to describe a group of UEs. Data transfer process:

 When a group of UEs to be scheduled are bound to a code resource, a bitmap is used in the control information to indicate a scheduled group of UEs and code resources allocated for the group of UEs, where code resources are allocated for a group of UEs. It can be orthogonal, pseudo-orthogonal, or non-orthogonal. For example, it is assumed that the group of UEs includes 8 UEs, and the number thereof is UE0 to UE7, and the corresponding code resources are the fifth number resource (#5) to the twelfth number resource (#12), respectively. The information includes a bitmap of 10111011, and the bitmap indicates both the scheduled UEs in the group and the code resources used by the scheduled UEs, that is, UE0, UE2, UE3, UE4, UE6, and UE7 are scheduled, and they transmit The code resources corresponding to the data are code resources: #5, #7, #8, #9, #11, and #12.

In addition to the implementation of binding a set of UEs to code resources as described above, when a group of UEs is bound to a time code resource or a frequency code resource, each bit in a bitmap indicates whether the corresponding UE is The scheduling also indicates the time domain resource and the code resource allocated by the UE when the UE is scheduled, or the frequency domain resource and the code resource, and the specific binding relationship is performed by using a group of UEs and time-frequency resources as shown in the foregoing fifth embodiment. The binding process is similar and will not be described here. Corresponding to the embodiment of the data transmission method of the present invention, the present invention also provides an embodiment of a data transmission device, a network device, and a UE.

 Referring to FIG. 6, which is a block diagram of an embodiment of a data transmission apparatus according to the present invention, the apparatus may be disposed in a network device:

 The apparatus includes: a generating unit 610 and a transmitting unit 620.

 The generating unit 610 is configured to generate control information, where the control information is bound to a group of UEs, and the group of UEs includes at least two UEs;

 The transmitting unit 620 is configured to transmit control information generated by the generating unit 610, so that the group of UEs performs data transmission by using resources in the control information.

 Optionally, the generating unit 610 may be specifically configured to: in the generated control information, bind a group of UEs to resources by using at least one of the following methods: binding a group of UEs with time domain resources. Bind a group of UEs with frequency domain resources; bind a group of UEs to code resources.

 Optionally, the generating unit 610 may be specifically configured to: in the generated control information, bind a group of UEs to the resource by using bitmap bitmap information, where each bit in the bitmap information indicates whether a UE is Scheduling, and resources allocated for one UE being scheduled.

 Optionally, the control information generated by the generating unit 610 may be control information used to schedule the group of UEs to perform uplink data transmission; or may be used to schedule the group of UEs to perform downlink data reception. Control information. Referring to FIG. 7, which is a block diagram of another embodiment of a data transmission apparatus according to the present invention, the apparatus may be disposed in a network device:

 The apparatus includes: an obtaining unit 710, a generating unit 720, and a transmitting unit 730.

 The obtaining unit 710 is configured to acquire, before the generating unit 720 generates the control information, a group identifier of the group of UEs, and a correspondence between each UE and the resources in the group of UEs, where the group The identifier is used to scramble the cyclic redundancy check code CRC of the control information;

 The generating unit 720 is configured to generate control information, where the group of UEs is bound to resources according to a correspondence between each UE and resources in the group of UEs.

 Optionally, the generating unit 720 may be specifically configured to: in the generated control information, bind a group of UEs to resources by using at least one of the following methods: binding a group of UEs with time domain resources Bind a group of UEs with frequency domain resources; bind a group of UEs to code resources.

Optionally, the generating unit 720 may be specifically configured to: in the generated control information, connect a group of UEs The bitmap bitmap information is bound to a resource, and each bit in the bitmap information indicates whether a UE is scheduled and resources allocated for one UE scheduled.

 Optionally, the control information generated by the generating unit 720 may be control information used to schedule the group of UEs to perform uplink data transmission; or may be used to schedule the group of UEs to perform downlink data reception. Control information.

 The transmitting unit 730 is configured to transmit control information generated by the generating unit 720, so that the group of UEs performs data transmission by using resources in the control information. Referring to FIG. 8, which is a block diagram of an embodiment of a network device according to the present invention, the network device may be specifically a base station in the network:

 The network device includes: a processor 810 and a transceiver 820. The processor 810 is configured to generate control information, where the control information is bound to a group of UEs, and the group of UEs includes at least two UEs;

 The wireless transceiver 820 is configured to transmit control information generated by the processor 810, so that the group of UEs performs data transmission by using resources in the control information.

 Optionally, the processor 810 may be specifically configured to bind, in the generated control information, a group of UEs and resources by using at least one of the following methods: binding a group of UEs with time domain resources. Binding a group of UEs with frequency domain resources; binding a group of UEs with code resources.

 Optionally, the processor 810 may be specifically configured to: in the generated control information, bind a group of UEs to the resource by using bitmap bitmap information, where each bit in the bitmap information indicates whether a UE is Scheduling, and resources allocated for one UE being scheduled.

 Optionally, the processor 810 is further configured to: before generating the control information, acquire a group identifier of the group of UEs, and a correspondence between each UE and the resources in the group of UEs, where the group identifier is used by The cyclic redundancy check code CRC of the control information is scrambled. Referring to FIG. 9, which is a block diagram of another embodiment of a data transmission apparatus according to the present invention, the apparatus may be disposed in a UE:

 The apparatus includes: a receiving unit 910, a determining unit 920, and a transmitting unit 930.

 The receiving unit 910 is configured to receive control information that is transmitted by using a PDCCH, where the control information is to bind a group of UEs to a resource, where the group of UEs includes at least two UEs;

a determining unit 920, configured to determine whether the UE belongs to the control information received by the receiving unit 910 a group of UEs included;

 The transmitting unit 930 is configured to perform data transmission according to the resource configured by the UE in the control information when the determining unit 920 determines that the UE belongs to the group of UEs.

 Optionally, the control information received by the receiving unit 910 is used to bind a group of UEs with resources in at least one of the following manners: binding a group of UEs with time domain resources; Bind with frequency domain resources; bind a group of UEs to code resources.

 Optionally, in the control information received by the receiving unit 910, a group of UEs may be bound to resources by using bitmap bitmap information, where each bit in the bitmap information indicates whether a UE is scheduled, and The resources allocated by the one UE scheduled.

 Optionally, the transmitting unit 930 may be specifically configured to perform uplink data transmission according to the resource configured for the UE in the control information, or perform downlink data according to the resource configured by the UE in the control information. receive. Referring to FIG. 10, it is a block diagram of another embodiment of a data transmission apparatus according to the present invention. The apparatus may be disposed in a UE:

 The apparatus includes: an obtaining unit 1010, a receiving unit 1020, a determining unit 1030, and a transmitting unit 1040. The acquiring unit 1010 is configured to acquire a group identifier of a group of UEs to which the UE belongs, and a correspondence between the UE and a resource, where the group of UEs includes at least two UEs;

 The receiving unit 1020 is configured to receive control information that is transmitted by using a PDCCH, where the received control information is specifically control information that is scrambled by a group identifier of a group of UEs to which the UE belongs;

 The determining unit 1030 is configured to determine, by the group identifier of the group of UEs to which the UE belongs, descramble the control information received by the receiving unit 1020, and determine that the group belongs to the group of UEs;

 The transmitting unit 1040 is configured to: when the determining unit 1030 determines that the UE belongs to the group of UEs, perform data transmission according to resources configured for the UE in the control information.

 Optionally, in the control information received by the receiving unit 1020, a group of UEs may be bound to a time domain resource, or a group of UEs may be bound to a frequency domain resource, or a group of UEs and a time frequency may be combined. Resources are bound.

 Optionally, in the control information received by the receiving unit 1020, a group of UEs are bound to resources by using at least one of the following methods: binding a group of UEs with time domain resources; Bind with frequency domain resources; bind a group of UEs to code resources.

Optionally, the transmitting unit 1040 may be specifically configured to: perform uplink data transmission according to the resource configured for the UE in the control information, or perform, according to the resource configured for the UE in the control information, Line data reception.

 Specifically, the transmission unit 1040 may include (not shown in FIG. 10):

 Obtaining a sub-unit, configured to acquire, according to the correspondence between the UE and the resource, a bit corresponding to the UE in the bitmap information received by the receiving unit 1020;

 And a transmitting subunit, configured to: when the bit acquired by the acquiring subunit indicates that the UE is scheduled, perform data transmission according to the resource indicated by the bit. Referring to FIG. 11, a block diagram of an embodiment of a UE according to the present invention is shown:

 The UE includes: a wireless transceiver 1110 and a processor 1120.

 The radio transceiver 1110 is configured to receive control information that is transmitted by using a PDCCH, where the control information is used to bind a group of UEs to a resource, where the group of UEs includes at least two UEs;

 The processor 1120 is configured to determine whether the UE belongs to a group of UEs included in the control information received by the wireless transceiver 1110;

 The wireless transceiver 1110 is further configured to: when the processor 1120 determines that the UE belongs to the group of UEs, perform data transmission according to resources configured by the UE in the control information.

 Optionally, in the control information received by the wireless transceiver 1110, a group of UEs is bound to resources by using at least one of the following methods: binding a group of UEs with time domain resources; The group UE is bound to the frequency domain resource; the group of UEs is bound to the code resource.

 Optionally, in the control information received by the radio transceiver 1110, a group of UEs may be bound to resources by using bitmap bitmap information, where each bit in the bitmap information indicates whether a UE is scheduled, And resources allocated for the one UE scheduled.

 Optionally, the processor 1120 is further configured to obtain a group identifier of the group of UEs to which the UE belongs, and a correspondence between the UE and the resource; and the control information received by the wireless transceiver 1110 may be Specifically, the control information that is scrambled by the group identifier of the group of UEs to which the UE belongs; the processor may be specifically configured to descramble the wireless transceiver by using a group identifier of a group of UEs to which the UE belongs After receiving the control information, it is determined that it belongs to the group of UEs.

Optionally, the wireless transceiver 1110 may be specifically configured to: perform uplink data transmission according to the resource configured for the UE in the control information, or perform, according to the control information, a resource configured for the UE. Downstream data reception. As can be seen from the above embodiment, the network device generates control information, where the control information includes at least two UEs. A group of UEs is bound to resources, and transmits the control information, and performs scheduling on a group of UEs, so that the group of UEs performs data transmission by using resources in the control information. The control information in the embodiment of the present invention can be used to schedule a group of UEs. For one PDCCH, it can be used to schedule a group of UEs. Compared with the existing one PDCCH, only one UE can be scheduled, which saves a lot of PDCCH resources. For scheduling MTC UEs for transmitting small data packets, since a group of UEs can be scheduled, for example, each PDCCH can schedule multiple PUSCH resources for transmitting data, thereby improving utilization of system spectrum resources.

 It will be apparent to those skilled in the art that the techniques in the embodiments of the present invention can be implemented by means of software plus a necessary general hardware platform. Based on such understanding, the technical solution in the embodiments of the present invention may be embodied in the form of a software product in essence or in the form of a software product, which may be stored in a storage medium such as a ROM/RAM. , a diskette, an optical disk, etc., includes instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or in some portions of the embodiments.

 The various embodiments in the present specification are described in a progressive manner, and the same or similar portions between the various embodiments may be referred to each other, and each embodiment focuses on differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method embodiment.

 The embodiments of the present invention described above are not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

Rights request A data transmission method, the method comprising:  The network device generates control information, where the control information is bound to a group of UEs, and the group of UEs includes at least two UEs;  Transmitting the control information to cause the group of UEs to perform data transmission by using resources in the control information. 2. The method according to claim 1, wherein a group of UEs are bound to resources in at least one of the following manners:  Binding a group of UEs with time domain resources;  Binding a group of UEs with frequency domain resources;  Bind a group of UEs to code resources. The method according to claim 1 or 2, wherein the binding of a group of UEs to resources is specifically as follows:  A group of UEs are bound to resources by using bitmap bitmap information, and each bit in the bitmap information indicates whether a UE is scheduled and resources allocated for one UE scheduled. The method according to any one of claims 1 to 3, wherein before the generating, by the network device, the control information, the method further includes: acquiring a group identifier of the group of UEs, and each of the group of UEs Corresponding relationship between the UE and the resource, where the group identifier is used to scramble the cyclic redundancy check code CRC of the control information;  The binding of the group of UEs to the resources is specifically: binding the group of UEs to resources according to the correspondence between each UE and the resources in the group of UEs. 5. A data transmission method, the method comprising:  The UE receives control information, where the control information binds a group of UEs to resources, and the group of UEs includes at least two UEs; When the UE determines to belong to the group of UEs, data transmission is performed according to the resources configured for the UE in the control information. 6. The method according to claim 5, wherein a group of UEs are bound to resources in at least one of the following manners:  Binding a group of UEs with time domain resources;  Binding a group of UEs with frequency domain resources;  Bind a group of UEs to code resources. The method according to claim 5 or 6, wherein the binding of a group of UEs and resources is specifically: binding a group of UEs to resources through bitmap bitmap information, the bitmap information Each bit in the cell indicates whether one UE is scheduled and resources allocated for the one UE being scheduled. The method according to claim 7, wherein the method further comprises: acquiring, by the UE, a group identifier of a group of UEs to which the UE belongs, and a correspondence between the UE and a resource;  The control information is specifically: control information that is scrambled by a group identifier of a group of UEs to which the UE belongs;  The determining, by the UE, that the group belongs to the group of UEs includes: after the UE descrambles the control information by using a group identifier of a group of UEs to which the UE belongs, determining that the UE belongs to the group of UEs.  The method according to claim 8, wherein the performing data transmission according to the resource configured by the UE in the control information comprises:  Obtaining, by the UE, a bit corresponding to the UE in the bitmap information according to the correspondence between the UE and the resource;  When the bit corresponding to the UE indicates that the UE is scheduled, the UE performs data transmission according to the resource indicated by the bit. 10. A data transmission device, the device comprising:  a generating unit, configured to generate control information, where the control information is used to bind a group of UEs to a resource, where the group of UEs includes at least two UEs; And a transmission unit, configured to transmit control information generated by the generating unit, so that the group of UEs performs data transmission by using resources in the control information. The device according to claim 10, wherein the generating unit is configured to: in the generated control information, bind a group of UEs and resources by using at least one of the following methods: The group UE is bound to the time domain resource; the group of UEs is bound to the frequency domain resource; and the group of UEs is bound to the code resource. The device according to claim 10 or 11, wherein the generating unit is configured to: in the generated control information, bind a group of UEs to resources by using bitmap bitmap information, where the bitmap is Each bit in the information indicates whether one UE is scheduled and resources allocated for one UE being scheduled. The device according to any one of claims 10 to 12, wherein the network device further comprises:  And an acquiring unit, configured to acquire, before the generating unit generates the control information, a group identifier of the group of UEs, and a correspondence between each UE and the resources in the group of UEs, where the group identifier is used to The cyclic redundancy check code CRC of the control information is scrambled;  The generating unit is specifically configured to bind the group of UEs and resources according to a correspondence between each UE and a resource in the group of UEs when generating control information. A network device, the network device comprising:  a processor, configured to generate control information, where the control information is bound to a group of UEs, and the group of UEs includes at least two UEs;  And a wireless transceiver, configured to transmit control information generated by the processor, to enable the group of UEs to perform data transmission by using resources in the control information. The network device according to claim 14, wherein the processor is specifically configured to: in the generated control information, bind a group of UEs and resources by using at least one of the following methods: A group of UEs is bound to time domain resources; a group of UEs is bound to frequency domain resources; and a group of UEs is bound to code resources. The network device according to claim 14 or 15, wherein the processor is specifically configured to: in the generated control information, bind a group of UEs to resources through bitmap bitmap information, where Each bit in the bitmap information indicates whether a UE is scheduled, and is one of the scheduled ones. The resources allocated by the UE. The network device according to any one of claims 14 to 16, wherein the processor is further configured to acquire, before generating control information, a group identifier of the group of UEs, and the group Corresponding relationship between each UE and the resource in the UE, the group identifier is used to scramble the cyclic redundancy check code CRC of the control information. 18. A data transmission device, the device comprising:  a receiving unit, configured to receive control information, where the control information is to bind a group of UEs to a resource, where the group of UEs includes at least two UEs;  a determining unit, configured to determine whether the UE belongs to a group of UEs included in control information received by the receiving unit;  And a transmitting unit, configured to: when the determining unit determines that the UE belongs to the group of UEs, perform data transmission according to resources configured for the UE in the control information. The apparatus according to claim 18, wherein, in the control information received by the receiving unit, a group of UEs is bound to resources by using at least one of the following methods: The domain resource is bound; the group of UEs is bound to the frequency domain resource; and the group of UEs is bound to the code resource. The device according to claim 18 or 19, wherein, in the control information received by the receiving unit, a group of UEs are bound to resources through bitmap bitmap information, and each of the bitmap information The bits indicate whether a UE is scheduled and resources allocated for the one UE being scheduled. The device according to claim 20, wherein the UE further includes: an acquiring unit, configured to acquire a group identifier of a group of UEs to which the UE belongs, and a correspondence between the UE and a resource;  The control information received by the receiving unit is specifically control information that is scrambled by a group identifier of a group of UEs to which the UE belongs; The determining unit is specifically configured to determine that the control information received by the receiving unit is descrambled by the group identifier of the group of UEs to which the UE belongs, and determine that the group belongs to the group of UEs. The device according to claim 21, wherein the transmission unit comprises: an acquisition subunit, configured to acquire, according to the correspondence between the UE and the resource, the bitmap information received by the receiving unit, and the The bit corresponding to the UE;  And a transmitting subunit, configured to: when the bit acquired by the acquiring subunit indicates that the UE is scheduled, perform data transmission according to the resource indicated by the bit. A UE, wherein the UE includes:  a wireless transceiver, configured to receive control information, where the control information binds a group of UEs to resources, and the group of UEs includes at least two UEs;  a processor, configured to determine whether the UE belongs to a group of UEs included in control information received by the wireless transceiver;  The wireless transceiver is further configured to: when the processor determines that the UE belongs to the group of UEs, perform data transmission according to resources configured by the UE in the control information. The UE according to claim 23, wherein the control information received by the wireless transceiver is used to bind a group of UEs with resources in at least one of the following manners: Binding with time domain resources; binding a group of UEs with frequency domain resources; binding a group of UEs with code resources. The UE according to claim 23 or 24, wherein, in the control information received by the wireless transceiver, a group of UEs are bound to resources by using bitmap bitmap information, the biotmap Each bit in the information indicates whether one UE is scheduled and the resources allocated for the one UE being scheduled. 26. The UE of claim 25, wherein:  The processor is further configured to acquire a group identifier of a group of UEs to which the UE belongs, and a correspondence between the UE and a resource;  The control information received by the wireless transceiver is specifically control information that is scrambled by a group identifier of a group of UEs to which the UE belongs;  The processor is specifically configured to determine, by the group identifier of the group of UEs to which the UE belongs, descramble the control information received by the wireless transceiver, and determine that the group belongs to the group of UEs.