WO2019047169A1 - Data transmission method and apparatus therefor, and communications system - Google Patents

Abstract

A data transmission method and an apparatus therefor, a data receiving method and an apparatus therefor, and a communications system. The data transmission method comprises: a network device configuring a parameter used to determine a control channel resource and/or a data channel resource used for retransmission of a control signal and/or a data signal; the network device determining a control channel resource and/or a data channel resource to be used for retransmission of a control signal and/or a data signal according to the parameter and a pre-determined rule; the network device retransmitting a control signal and/or a data signal on the control channel resource and/or the data channel resource used for retransmission of the control signal and/or the data signal. Thus, control signal and data signal transmission reliability are increased by means of retransmission, improving flexibility of control signal aggregation level, lowering control signaling overhead, and decreasing frequency and power consumption of user blind detection.

Description

Data transmission method and device thereof, communication system Technical field

The present invention relates to the field of communications, and in particular, to a data transmission method, a device, and a communication system suitable for high-reliability and low-latency communication without hybrid automatic retransmission technology.

Background technique

Ultra Reliable and Low Latency Communication (URLLC) is one of the three major deployment scenarios of 5G. The URLLC user plane delay requirement is that the uplink transmission does not exceed 0.5 ms and the downlink transmission does not exceed 0.5 ms; the general requirement of reliability is that the reliability of a 32-byte data packet should be reached under the user plane delay of 1 ms. 99.999%.

Hybrid Automatic Repeat-ReQuest (HARQ) technology is an effective means to improve transmission reliability. However, in some special cases, HARQ is not applicable in URLLC scenarios, such as Time Division Duplexing (TDD). In the scenario of macro deployment, in order to reduce the guard interval (GP) overhead and inter-link interference, the uplink and downlink cannot be frequently switched. In this case, HARQ cannot meet the low latency requirement of URLLC.

Therefore, how to meet the requirements of URLLC high reliability and low latency in the case of no hybrid automatic repeat request (HARQ-less) technology is the current research focus.

It should be noted that the above description of the technical background is only for the purpose of facilitating a clear and complete description of the technical solutions of the present invention, and is convenient for understanding by those skilled in the art. The above technical solutions are not considered to be well known to those skilled in the art simply because these aspects are set forth in the background section of the present invention.

Summary of the invention

The inventors have found that in order to improve the reliability of HARQ-less transmission, continuous transmission, that is, repeated transmission after multiple transmissions is a feasible method. In addition, the compact downlink control information (compact DCI) and the highest aggregation level are considered to be the new Radio-Physical Downlink Control CHannel (NR-PDCCH). An effective method of transmission reliability. However, while the highest degree of aggregation increases the reliability, the number of times of NR-PDCCH blind detection by the UE is also increased, thereby increasing the power consumption and processing delay of the UE.

In order to solve the above problems, an embodiment of the present invention provides a data transmission method, an apparatus, and a communication system.

According to a first aspect of the embodiments of the present invention, a data transmission method is provided, wherein the method includes:

The network device is configured to determine parameters of control channel resources and/or data channel resources used by the retransmission control signal and/or the data signal;

Determining, by the network device, control channel resources and/or data channel resources used by the retransmission control signal and/or the data signal according to the parameter and a preset rule;

The network device repeatedly transmits the control signal and/or data signal over control channel resources and/or data channel resources used by the retransmission control signal and/or data signal.

According to a second aspect of the embodiments of the present invention, a data receiving method is provided, wherein the method includes:

The user equipment divides the control channel resource used by the retransmission control signal into multiple parts according to a preset first rule;

The user equipment sequentially detects the control signal on each part of the control channel resource, and if the control signal is detected on a part of the control channel resource, the detection is ended; otherwise, the detected signal is buffered, and The signals detected on a portion of the control channel resources are combined until the control signal is detected.

According to a third aspect of the embodiments of the present invention, a data transmission apparatus is provided, wherein the apparatus comprises:

a configuration unit configured to determine parameters of control channel resources and/or data channel resources used by the retransmission control signal and/or the data signal;

a determining unit that determines a control channel resource and/or a data channel resource used by the retransmission control signal and/or the data signal according to the parameter and a preset rule;

And a transmitting unit that repeatedly transmits the control signal and/or the data signal on a control channel resource and/or a data channel resource used by the retransmission control signal and/or the data signal.

According to a fourth aspect of the embodiments of the present invention, a data receiving apparatus is provided, wherein the apparatus comprises:

a first dividing unit, which divides the control channel resource used by the retransmission control signal into a plurality of parts according to a preset first rule;

a first detecting unit, which sequentially detects the control signal on each part of the control channel resource, and if the control signal is detected on a part of the control channel resource, ends the detection; otherwise, the detected signal is buffered, and Merging with signals detected on the next portion of the control channel resources until the control signal is detected.

According to a fifth aspect of the embodiments of the present invention, a network device is provided, wherein the network device includes The device of the aforementioned third aspect.

According to a sixth aspect of the embodiments of the present invention, there is provided a user equipment, wherein the user equipment comprises the apparatus of the aforementioned fourth aspect.

According to a seventh aspect of the embodiments of the present invention, there is provided a communication system, wherein the communication system comprises a network device and a user equipment, the network device comprising the apparatus of the foregoing third aspect, the user equipment comprising the foregoing The device of the fourth aspect.

According to an eighth aspect of the embodiments of the present invention, there is provided a computer readable program, wherein the program causes the data transmission device or network device to perform the present invention when the program is executed in a data transmission device or a network device The method of the first aspect of the embodiment.

According to a ninth aspect of the embodiments of the present invention, there is provided a storage medium storing a computer readable program, wherein the computer readable program causes a data transmission device or a network device to perform the first aspect of the embodiment of the present invention method.

According to a tenth aspect of the embodiments of the present invention, there is provided a computer readable program, wherein the program causes the data receiving device or user equipment to perform the present invention when the program is executed in a data receiving device or a user device The method of the second aspect of the embodiment.

According to an eleventh aspect of the present invention, there is provided a storage medium storing a computer readable program, wherein the computer readable program causes a data receiving device or user equipment to perform the second aspect of the embodiments of the present invention Methods.

The beneficial effects of the embodiments of the present invention are: by presetting the rules for determining resources (control channel resources and/or data channel resources) used for retransmission of control signals and/or data signals, and configuring corresponding parameters, When data transmission and reception are performed, the reliability of the control signal and the data signal transmission is improved by retransmitting the control signal and/or the data signal, and the flexibility of the control signal aggregation degree is increased; the control is reduced by using a preset rule. The overhead of signaling reduces the number and power consumption of the user's blind control signal.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and the drawings, in which <RTIgt; It should be understood that the embodiments of the invention are not limited in scope. The embodiments of the present invention include many variations, modifications, and equivalents within the scope of the appended claims.

Features described and/or illustrated with respect to one embodiment may be used in one or more other embodiments in the same or similar manner, in combination with, or in place of, features in other embodiments. .

It should be emphasized that the term "comprising" or "comprises" or "comprises" or "comprising" or "comprising" or "comprising" or "comprising" or "comprising" or "comprising" or "comprising"

DRAWINGS

The elements and features described in one of the figures or one embodiment of the embodiments of the invention may be combined with the elements and features illustrated in one or more other figures or embodiments. In the accompanying drawings, like reference numerals refer to the

The accompanying drawings are included to provide a further understanding of the embodiments of the invention Obviously, the drawings in the following description are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings according to the drawings without any inventive labor. In the drawing:

1 is a schematic diagram of a communication system according to an embodiment of the present invention;

2 is a schematic diagram of a data transmission method of Embodiment 1;

3 is a schematic diagram of allocation of control channel resources for retransmission of control signals in Embodiment 1;

4 is a schematic diagram of one embodiment of resource mapping of control signal and data signal retransmission in Embodiment 1;

5 is a schematic diagram of another embodiment of resource mapping of control signal and data signal retransmission in Embodiment 1;

6 is a schematic diagram of time-frequency resource allocation of data signal retransmission in Embodiment 1;

7 is a schematic diagram of still another embodiment of resource mapping of control signal and data signal retransmission in Embodiment 1;

8 is a schematic diagram showing an example of data transmission by a gNB in Embodiment 1;

9 is a schematic diagram showing another example of data transmission by the gNB in Embodiment 1;

FIG. 10 is a schematic diagram showing still another example of data transmission by the gNB in Embodiment 1; FIG.

11 is a schematic diagram of a data receiving method of Embodiment 2;

Figure 12a is a schematic diagram of a data transmission device of Embodiment 3;

12b to 12f are schematic views of five embodiments of a determining unit in the data transmission device of Embodiment 2;

Figure 13 is a schematic diagram of a network device of Embodiment 4;

Figure 14 is a schematic diagram of a data receiving apparatus of Embodiment 5;

Figure 15 is a schematic diagram of a user equipment of Embodiment 6.

Detailed ways

The foregoing and other features of the present invention will be apparent from the The specific embodiments of the present invention are disclosed in the specification and the drawings, which are illustrated in the embodiment of the invention The invention includes all modifications, variations and equivalents falling within the scope of the appended claims. Various embodiments of the present invention will be described below with reference to the accompanying drawings. These embodiments are merely exemplary and are not limiting of the invention.

In the embodiment of the present invention, the terms "first", "second", etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or chronological order of the elements, and these elements should not be used by these terms. Limited. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "comprising," "having," or "an"

In the embodiments of the present invention, the singular forms "a", "the", "the", "the" and "the" It is to be understood that the singular In addition, the term "subject" should be understood to mean "based at least in part", and the term "based on" should be understood to mean "based at least in part on" unless the context clearly indicates otherwise.

In the embodiment of the present invention, the term "communication network" or "wireless communication network" may refer to a network that conforms to any communication standard such as Long Term Evolution (LTE), Enhanced Long Term Evolution (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), and the like.

Moreover, the communication between devices in the communication system may be performed according to any phase of the communication protocol, and may include, for example but not limited to, the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and future. 5G, New Radio (NR), etc., and/or other communication protocols currently known or to be developed in the future.

In the embodiment of the present invention, the term "network device" refers to, for example, a device in a communication system that accesses a terminal device to a communication network and provides a service for the terminal device. The network device may include, but is not limited to, a device: a base station (BS, a base station), an access point (AP, an Access Point), a transmission and reception point (TRP), a broadcast transmitter, and a mobility management entity (MME, Mobile). Management Entity), gateway, server, Radio Network Controller (RNC), Base Station Controller (BSC), and so on.

The base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), and a 5G base station (gNB), and the like, and may further include a Remote Radio Head (RRH). , Remote Radio Unit (RRU), relay or low power node (eg femto, pico, etc.). And the term "base station" may include some or all of their functions, and each base station may provide communication coverage for a particular geographic area. The term "cell" can refer to a base station and/or its coverage area, depending on the context in which the term is used.

In the embodiment of the present invention, the term "user equipment" (UE) or "Terminal Equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives a network service. The user equipment may be fixed or mobile, and may also be referred to as a mobile station (MS, Mobile Station), a terminal, a subscriber station (SS, Subscriber Station), an access terminal (AT, Access Terminal), a station, and the like.

The user equipment may include, but is not limited to, a cellular phone (Cellular Phone), a personal digital assistant (PDA, Personal Digital Assistant), a wireless modem, a wireless communication device, a handheld device, a machine type communication device, a laptop computer, Cordless phones, smart phones, smart watches, digital cameras, and more.

For example, in a scenario such as the Internet of Things (IoT), the user equipment may also be a machine or device that performs monitoring or measurement, and may include, but is not limited to, a Machine Type Communication (MTC) terminal, In-vehicle communication terminal, device to device (D2D, Device to Device) terminal, machine to machine (M2M, Machine to Machine) terminal, and the like.

The scenario of the embodiment of the present invention is described below by way of example, but the embodiment of the present invention is not limited thereto.

1 is a schematic diagram of a communication system according to an embodiment of the present invention, schematically illustrating a case where a user equipment and a network device are taken as an example. As shown in FIG. 1, the communication system 100 may include a network device 101 and a user equipment 102 (for simplicity) Figure 1 shows only one user equipment as an example.)

In the embodiment of the present invention, an existing service or a service that can be implemented in the future can be performed between the network device 101 and the user equipment 102. For example, these services include, but are not limited to, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and high reliability low latency communication (URLLC, Ultra-Reliable and Low- Latency Communication), and more.

The user equipment 102 can transmit data to the network device 101, for example, using an unlicensed transmission method. The network device 101 can receive data sent by one or more user devices 102 and feed back information (eg, acknowledge ACK/non-acknowledgement NACK) information to the user device 102. The user device 102 can confirm the end of the transmission process according to the feedback information, or can further Perform new data transfer or data retransmission.

Example 1

This embodiment provides a data transmission method, which is applied to a network device of a communication system, and FIG. 2 is a flowchart of the method. Referring to FIG. 2, the method includes:

Step 201: The network device is configured to determine parameters of control channel resources and/or data channel resources used by the retransmission control signal and/or the data signal;

Step 202: The network device determines, according to the parameter and a preset rule, a control channel resource and/or a data channel resource used by the retransmission control signal and/or the data signal.

Step 203: The network device repeatedly transmits the control signal and/or the data signal on a control channel resource and/or a data channel resource used by the retransmission control signal and/or the data signal.

In this embodiment, the network device and the user equipment pre-arrange a rule for determining control channel resources and/or data channel resources used by the retransmission control signal and/or the data signal, and the network device corresponds to the configuration by the configuration. The parameters of the rule determine the corresponding resources, and perform retransmission of the control signal and/or the data signal on the determined resource. Therefore, since the corresponding resources are no longer configured and indicated for each retransmission, the downlink is reduced. Controlling the payload of the information; and once the first transmitted control signal is solved, there is no need to blindly check the subsequent retransmission control signal, thereby reducing the number of times the user blindly detects the control signal; conversely, if the first blind detection fails Then, the received control signal information can be buffered, and combined with the blind detection of the next control signal according to the rule of retransmission of the control signal to improve the probability of successful blind detection.

In this embodiment, the network device may set a rule for allocating a retransmission control signal and/or a data signal resource, where the rule is preset, that is, the network device does not need to perform each time data transmission is performed. With such a setting, both the network device and the user device have a common understanding and awareness of the rule by the above setting. In addition, the above rules are not necessarily set by the network device, and may also be defined in advance by a factory configuration or a service provider such as an operator.

In one embodiment, the parameters for determining the control channel resource used by the retransmission control signal include: the number of retransmissions of the control signal R _{1, k} , the initial control channel element of the initial transmission control signal (Control Channel Element, CCE) δ _k and Aggregation Level L _k .

In this embodiment, the network device may first determine the rth time according to R _{1, k} , δ _k , the number N of CCEs included in each control resource set (COntrol REsource SET, CORESET), and the foregoing preset rules. Transmitting a starting position of the CCE occupied by the control signal; and determining, according to the foregoing Lk and the determined starting position, a control channel resource used for transmitting the control signal for the rth time.

In this embodiment, the preset rule is a calculation formula of the starting position of the CCE occupied by the rth transmission of the control signal, and can be expressed as:

Thereby, the starting position of the CCE occupied by the rth transmission of the control signal can be determined, thereby determining the control channel resource used for the repeated transmission (ie, multiple transmissions) of the control signal.

其中r＝0，...，R_1，k-1。由此，可以确定每次发送该控制信号所占用的CCE。For example, suppose there are K users sharing a CORESET containing N CCEs, and the number of retransmissions of user k is R _1,k . If the user k occupies the L _k CCE initial transmission control signals from the δ _k CCEs, that is, the degree of aggregation is L _k , where δ _k =0, . . . , N−1, then the control signal is transmitted for the rth time. The starting position of occupying CCE is

Where r=0,...,R _1,k -1. Thereby, the CCE occupied by transmitting the control signal each time can be determined.

Figure 3 shows the allocation of control channel resources used by the control signal retransmission. In the example of Figure 3, N = 32, R _{1, k} = 3, δ _k = 4, L _k = 4.

In another embodiment, the parameter used to determine the control channel resource used by the retransmission control signal includes: the number of resource blocks (RBs) occupied by the control signal in the frequency domain, I _k (where Q×L _k , Q is the number of RBs occupied by each CCE, such as Q=6 in the NR system, the number of RBs occupied by the data signal in the frequency domain J _k , and the first time occupied by the rth transmission of the control signal RB number ρ _r .

In this embodiment, the network device may first determine, according to the foregoing I _k , J _k , ρ _r , the total number of RBs in the system bandwidth, and the foregoing preset rule, the ith RB occupied by the rth transmission of the control signal. The number, where i=1, . . . , I _k , determines the resource block occupied by the rth transmission control signal according to the I _k , J _k and the number.

In this embodiment, the control signal is distributedly mapped in the frequency domain, and the preset rule is a calculation formula of the number of the ith RB occupied by the control signal in the frequency domain for the rth time, and may be Expressed as:

Therefore, it can be determined that the number of the i-th RB occupied by the control signal in the frequency domain is transmitted in the rth time, and then the RB that is used to transmit the control signal in the frequency domain is determined to be r-th, and finally the repeated transmission is determined (that is, multiple Send once) The control channel resource used by the control signal.

由此，可以确定每次发送控制信号所占用的RB。For example, suppose that the control signal occupies 1 _k RBs after resource mapping, and the number of the first RB used for transmitting the control signal for the rth time is ρ _r , and the ith RB used for transmitting the control signal for the rth time Number is

Thereby, it is possible to determine the RB occupied by each transmission of the control signal.

Figure 4 illustrates the resource mapping of the control signal. In the example of Figure 4, I _k = 3, ρ ₀ = 3, ρ ₁ = 16, and the control signal and the data signal occupy the same symbol in time.

In another embodiment, the parameters for determining the control channel resource used by the retransmission control signal include: the number of RBs occupied by the control signal I _k , and the number of the first RB occupied by the rth transmission of the control signal ρ _r .

In this embodiment, the network device may first determine, according to the foregoing ρ _r , the total number of RBs in the system bandwidth, and the foregoing preset rule, the number of the ith RB occupied by the rth transmission of the control signal; I _k and the determined number above determine the control channel resource used for transmitting the control signal for the rth time.

In this embodiment, the control signal is centrally mapped in the frequency domain, and the preset rule is a calculation formula of the number of the i-th RB occupied by the control signal in the frequency domain for the rth time, and may be Expressed as:

(ρ _r +i)mod(M-1)

Therefore, it can be determined that the number of the i-th RB occupied by the control signal in the frequency domain is transmitted in the rth time, and then the RB that is used to transmit the control signal in the frequency domain is determined to be r-th, and finally the repeated transmission is determined (that is, multiple Secondary transmission) Control channel resources used by the control signal.

For example, suppose that the control signal occupies 1 _k RBs after resource mapping, and the number of the first RB used for transmitting the control signal for the rth time is ρ _r , and the ith RB used for transmitting the control signal for the rth time The number is (ρ _r +i) mod(M-1). Thereby, it is possible to determine the RB occupied by each transmission of the control signal.

Figure 5 illustrates the resource mapping of the control signal. In the example of Figure 5, I _k = 3, ρ ₀ =0, ρ ₁ = 13, and the control signal and the data signal occupy the same symbol in time.

In another embodiment, the parameters for determining the data channel resource used by the retransmitted data signal include: the number of retransmissions of the data signal R _2,k , the number of symbols S _k occupied by the data signal each time, The start symbol s _{k of the} first transmitted data signal, the number of RBs J _k occupied by the data signal in each frequency domain, and the start RBη _{k of the} first transmitted data signal.

In this embodiment, the network device may first determine, according to the foregoing R _2,k , η _k , the total number of RBs in the system bandwidth, and the foregoing preset rules, to transmit the RB occupied by the data signal in the frequency domain for the rth time. a starting position; determining, according to the above S _k , s _k , J _k and the determined starting position, a resource block occupied by the rth transmitting the data signal.

In this embodiment, the preset rule is a calculation formula for transmitting the start position of the RB occupied by the data signal in the frequency domain for the rth time, and can be expressed as:

Therefore, it can be determined that the r position of the RB occupied by the data signal in the frequency domain is transmitted in the rth time, thereby determining the RB occupied by the r signal in the frequency domain, and finally determining the repeated transmission (that is, multiple The data channel resource used by the data signal.

For example, the system bandwidth is assumed that there are M the RB, the number of times data is repeatedly transmitted signals R _{2, k,} provided each retransmission time resource occupied by the same, i.e., the start of occupation of the time symbol s _k S _k Symbols. The first transmission of the data signal occupies J _k RBs from the η _k RBs in frequency, that is, occupying 12 J _k subcarriers, where η _k =0, . . . , M-1, then the data signal is transmitted r times. The starting position of the RB occupied in the frequency domain is

Figure 6 illustrates the allocation of time-frequency resources in the case of repeated transmission of data signals. In the example of Figure 6, M = 13, R _{2, k} = 3, S _k =1, s _k = 6, J _k = 2 , η _k = 2.

Figure 7 illustrates the resource mapping of the data signal and the control signal, wherein the control signal and the data signal occupy different symbols in time.

In another embodiment, the parameters for determining the data channel resource used by the retransmitted data signal include: the number of retransmissions of the data signal R _2,k , the number of symbols S _k occupied by the data signal each time, The starting symbol s _{k of the} first transmitted data signal, the number of resource blocks J _k occupied by the data signal in each frequency domain, the starting resource block η _{k of the} first transmitted data signal, and the transmission control signal in the frequency domain each time The number of resource blocks occupied on the I _k .

In this embodiment, the network device may first determine, according to the foregoing J _k , I _k , η _k , the total number of resource blocks in the system bandwidth, and the foregoing preset rules, the r-th transmission of the data signal in the frequency domain. The starting position of the resource block; determining the resource block occupied by the rth transmission of the data signal according to the above S _k , s _k , J _k , I _k and the determined starting position.

In this embodiment, the preset rule is a calculation formula for transmitting the start position of the RB occupied by the data signal in the frequency domain for the rth time, and can be expressed as:

(r×(J _k +I _k )+η _k )mod(M-1)

Thereby, it can be determined that the r position of the RB occupied by the data signal in the frequency domain is transmitted at the rth time, and further The RB occupied by the data signal in the frequency domain is transmitted for the rth time, and finally the data channel resource used for the data signal is repeatedly transmitted (that is, transmitted multiple times).

For example, suppose there are M RBs in the system bandwidth, and the number of times the data signal is repeatedly transmitted is R _2,k . The time resource occupied by each retransmission is the same, that is, the number of symbols occupied in time S _k , the first time data is sent. The starting symbol of the signal is s _k , the number of RBs occupied in the frequency domain is J _k , and the initial RB of the first transmitted data signal is η _k , where η _k =0,..., M-1 can pass η _k = ρ _r + I _k is determined, and the starting position of the RB occupied by the r-th repeated transmission of the data signal in the frequency domain is (r × (J _k + I _k ) + η _k ) mod (M-1 ).

4 and 5 also illustrate the resource mapping of the data signal. In the example of FIG. 4, the data signal is distributedly mapped in the frequency domain. In the example of FIG. 5, the data signal is concentrated in the frequency domain. Mapped.

In this embodiment, the precoder used by the network device to transmit the data signal may be the same or different. That is, the data signals of different retransmissions may use different beams. In this case, the network device also needs to be configured accordingly, for example, by using DCI included in the control signal for different retransmissions. Different precoders are instructed.

In this embodiment, the parameters for determining the control channel resources used by the retransmission control signal may be configured by radio resource control (RRC) signaling, but the embodiment is not limited thereto.

In this embodiment, the parameter for determining the data channel resource used by the retransmitted data signal may be configured by DCI in the foregoing control signal. For example, the DCI may include but is not limited to the following information:

The number of times the data signal is repeatedly transmitted R _2,k ;

The resource indication of the data signal, including the number of RBs M in the system bandwidth, the number of symbols occupied in time S _k and the initial transmitted symbol s _k , the number of symbols occupied in the frequency domain J _k and the initial transmitted initial RBη _k ;

The transmission format of the data signal includes an indication ζ, the value of which is 0 or 1 to indicate whether the format of each data signal transmission is consistent, the modulation coding mode used for each data signal transmission, and the like;

An indication of the different beams used by the data signal retransmission.

Therefore, for multiple retransmissions of the control signal, the UE can, according to the foregoing rules agreed by the network device and the UE in advance, once the control signal sent for the first time is solved, there is no need to blindly check the control signal of the subsequent retransmission, thereby reducing The number of times the user blindly detects the control signal; if the first blind detection fails, the received control signal information may be buffered, and combined with the blind detection of the next control signal according to the rule of retransmission of the control signal, Improve the probability of successful blind detection. In addition, for multiple retransmissions of the data signal, after the UE obtains the above control signal, the UE can According to the foregoing rules agreed by the network device and the UE in advance, and the resource location of the first data signal transmission, the resource used for retransmission of the subsequent data signal is derived, and the data signal is obtained by detecting on the resource. The processing on the UE side will be described in the following embodiments, and details are not described herein again.

The data transmission method of the present embodiment will be described below by three examples, and the description of the same portions as those of the foregoing will not be repeated. In the following description, the network device is a gNB, the control signal is NR-PDCCH, and the data signal is a physical downlink shared control channel (PDSCH). However, this embodiment does not limit this. .

Example one

FIG. 8 is a schematic diagram of a process flow of the gNB in the present example. As shown in FIG. 8, according to the data transmission method of this embodiment, the gNB can perform the following processing:

Step 801: The gNB performs parameter configuration according to the channel state information (CSI) reported by the UE or the uplink channel estimation of the Sounding Reference Signal (SRS).

Step 802: The gNB generates data of the NR-PDCCH and maps it to a resource element (Resource Element, RE) of the control channel.

Step 803: The gNB generates data of the PDSCH and maps it to the RE of the data channel.

Step 804: The gNB notifies the UE of the retransmission times R _{1, k of} different NR-PDCCHs through RRC signaling, and the beams used by the NR-PDCCHs when different NR-PDCCHs use different beams;

Step 805: The gNB repeatedly transmits the NR-PDCCH and the PDSCH generated in steps 803 and 804 according to the parameters configured in step 801.

In step 801, the gNB can perform parameter configuration according to the CSI reported by the UE. For the TDD system, the gNB can also perform parameter configuration according to the uplink channel estimation of the SRS in view of the reciprocity of the uplink and downlink channels.

In step 801, the parameters configured by the gNB include the foregoing parameters for determining the control channel resources used by the retransmission control signal and parameters for determining the data channel resources used by the retransmission data signal, and further, the parameters of the gNB configuration It also contains other parameters needed for data transfer. For example:

The number of times the NR-PDCCH is repeatedly transmitted R _1,k ;

The number of repeated transmissions of the PDSCH R _2,k ;

The relevant parameters of the NR-PDCCH include: a modulation and coding mode used for initial transmission and subsequent transmission of the NR-PDCCH, a transmission power, a precoding matrix, a degree of aggregation L _k , and a CCE δ _k occupied by the initial transmission;

由此，gNB可以根据该公式计算第r次发送NR-PDCCH所占用的CCE的起始位置。Thus, a rule pre-agreed by the gNB and the UE (which may be referred to as a first rule or a control channel resource determination rule) may be: the starting position of the CCE occupied by the rth transmission NR-PDCCH is

Thus, the gNB can calculate the starting position of the CCE occupied by the rth transmission NR-PDCCH according to the formula.

The relevant parameters of the PDSCH include: the modulation and coding mode, the transmission power, the precoding matrix used for each transmission of the PDSCH, the number of symbols occupied in time S _k , the start symbol s _{k of the} first transmission PDSCH, and the RB occupied in the frequency domain. The number J _k and the initial RBη _{k of the} first transmission of the PDSCH and the like.

由此，gNB可以根据该公式计算第r次发送PDSCH在频域上占用的RB的起始位置。Therefore, another rule pre-agreed by the gNB and the UE (which may be referred to as a second rule or a data channel resource determination rule) may be: the start position of the RB occupied by the PD-time in the frequency domain is

Thus, the gNB can calculate the starting position of the RB occupied by the PDSCH in the frequency domain according to the formula according to the formula.

In step 802, data of the NR-PDCCH may be generated by coding, modulation, and precoding (if different NR-PDCCHs are transmitted by different times), and the specific generation method is not limited in this embodiment.

In step 803, the data of the PDSCH can be generated by means of coding, modulation, precoding (if different NR-PDCCHs are transmitted by different times), and the specific generation method is not limited in this embodiment.

Through the process flow of FIG. 8, the NR-PDCCH and the PDSCH are repeatedly transmitted, and since the gNB and the UE pre-arrange the rules for determining the resources of retransmitting the NR-PDCCH multiple times and the resources of retransmitting the PDSCH multiple times, The UE can obtain the corresponding data by detecting according to the above parameters of the gNB configuration in combination with the predetermined rule. For example, the UE may perform blind detection on the NR-PDCCH in the divided search space according to the beam indication signaling of the RRC: if the first NR-PDCCH blind check succeeds, the UE will not blindly check other repeated transmissions. NR-PDCCH; if the first NR-PDCCH blind detection fails, the UE buffers the NR-PDCCH, and combines and blindly checks with other NR-PDCCH retransmissions according to the determined resource allocation of the NR-PDCCH. To increase the probability of successful blind detection. Then, the UE may combine and demodulate the repeatedly transmitted PDSCH according to the demodulated NR-PDCCH according to the resource allocation of the PDSCH indicated by the NR-PDCCH.

Example two

FIG. 9 is a schematic diagram of a process flow of the gNB in this example. As shown in FIG. 9, according to the data transmission method of this embodiment, the gNB can perform the following processing:

Step 901: The gNB performs parameter configuration according to the channel state information (CSI) reported by the UE or the uplink channel estimation of the Sounding Reference Signal (SRS).

Step 902: The gNB generates data of the NR-PDCCH and maps it to the RE of the control channel.

Step 903: The gNB generates data of the PDSCH and maps it to the RE of the data channel.

Step 904: The gNB notifies the UE of the retransmission times R _{1, k of} different NR-PDCCHs through RRC signaling, and the beams used by the NR-PDCCHs when different NR-PDCCHs use different beams;

Step 905: The gNB repeatedly transmits the NR-PDCCH and the PDSCH generated in steps 903 and 904 according to the parameters configured in step 901.

In this example, different from step 801 of the first example, in step 901, the related parameters of the configured NR-PDCCH include: modulation coding mode, transmission power, and precoding used for initial transmission and subsequent transmission of the NR-PDCCH. matrix, the degree of polymerization L _k, the number of NR-PDCCH resource mapping after the RB occupied by I _k, the first transmission of a RB number NR-PDCCH [rho] _r r-th.

由此，gNB可以根据该公式计算第r次发送NR-PDCCH的第i个RB的编号。Therefore, the rule that the gNB and the UE pre-agreed (which may be referred to as a first rule or a control channel resource determination rule) may be that the number of the i-th RB of the r-th transmission NR-PDCCH is

Thus, the gNB can calculate the number of the ith RB of the rth transmission NR-PDCCH according to the formula.

In this example, another difference from step 801 of the first example is that, in step 901, the related parameters of the configured PDSCH include: a modulation coding mode, a transmission power, a precoding matrix, and a time used each time the PDSCH is transmitted. The number of symbols occupied on the _Sk , the start symbol s _{k of the} first transmission of the PDSCH, the number of RBs occupied by the PDSCH in the frequency domain J _k , the number of RBs occupied by the NR-PDCCH in the frequency domain I _k and the start of the first transmission of the PDSCH RBη _k .

Therefore, the rule agreed by the gNB and the UE in advance (which may be referred to as a second rule or a data channel resource determining rule) may be: the starting position of the RB occupied by the r-th PDSCH in the frequency domain is (r×( J _k +I _k )+η _k )mod(M−1), whereby the gNB can calculate the starting position of the RB occupied by the PDSCH in the frequency domain according to the formula.

In this example, the processing of steps 902-905 is the same as the processing of steps 802-805 in the first example, and details are not described herein again.

Example three

FIG. 10 is a schematic diagram of a process flow of the gNB in the present example. As shown in FIG. 10, based on the data transmission method of this embodiment, the gNB can perform the following processing:

Step 1001: The gNB is based on channel state information (CSI) reported by the UE. Or parameterizing the uplink channel estimation of the Sounding Reference Signal (SRS);

Step 1002: The gNB generates data of the NR-PDCCH and maps it to the RE of the control channel.

Step 1003: The gNB generates data of the PDSCH and maps it to the RE of the data channel.

Step 1004: The gNB notifies the UE of the retransmission times R _{1, k of} different NR-PDCCHs through RRC signaling, and the beams used by the NR-PDCCHs when different NR-PDCCHs use different beams;

Step 1005: The gNB repeatedly transmits the NR-PDCCH and the PDSCH generated in step 1003 and step 1004 according to the parameters configured in step 1001.

In this example, different from step 901 of the second example, in step 1001, the related parameters of the configured NR-PDCCH include: modulation coding mode, transmission power, and precoding used for initial transmission and subsequent transmission of the NR-PDCCH. matrix, the degree of polymerization L _k, the number of NR-PDCCH resource mapping after the RB occupied by I _k, the first transmission of a RB number NR-PDCCH [rho] _r r-th.

Therefore, the rule agreed by the gNB and the UE in advance (which may be referred to as a first rule or a control channel resource determination rule) may be: the number of the ith RB of the rth transmission NR-PDCCH is (ρ _r +i) Mod(M-1), whereby the gNB can calculate the number of the ith RB of the rth transmission NR-PDCCH according to the formula.

In this example, the parameters of the configured PDSCH are the same as those in the second example. The processing of the steps 1002-1005 is the same as the processing of the steps 802-805 in the first example, and details are not described herein again.

The method of this embodiment pre-sets rules for determining resources (control channel resources and/or data channel resources) used for retransmission of control signals and/or data signals, and configures corresponding parameters when performing data transmission. By retransmitting the control signal and/or the data signal, the reliability of the control signal and the data signal transmission is improved, and the flexibility of the control signal aggregation degree is increased; the preset control rule reduces the overhead of the control signaling and reduces The number and power consumption of the user's blind control signal.

Example 2

The present embodiment provides a data receiving method, which is a UE-side processing corresponding to the method of Embodiment 1, and the same content as Embodiment 1 is not repeatedly described.

11 is a schematic diagram of the method of this embodiment. As shown in FIG. 11, the method includes:

Step 1101: The user equipment divides the control channel resource used by the retransmission control signal into multiple parts according to a preset first rule.

Step 1102: The user equipment sequentially checks the control signal on each part of the control channel resource. Testing, if the control signal is detected on a portion of the control channel resources, the detection is terminated, otherwise the detected signal is buffered and combined with the signal detected on the next portion of the control channel resource until the control is detected signal.

In this embodiment, since the network device and the UE have previously agreed on a rule (first rule) for determining a control channel resource used by the retransmission control signal, the UE determines the retransmission according to the parameter configured by the network device, in combination with the rule. Control channel resources used by the control signals.

然后，在盲检第r次控制信号的重发时，只需在搜索空间

进行盲检即可，从而减小搜索空间，降低控制信号盲检的次数。In this embodiment, when the UE performs blind detection of the control signal, the entire CORESET may be divided into multiple parts, for example, divided into R _{1, k} parts, respectively represented as

Then, when blindly checking the retransmission of the rth control signal, it is only in the search space.

Blind detection can be performed to reduce the search space and reduce the number of blind detection of control signals.

In this embodiment, if the UE fails the blind detection for the control signal at the rth time, the UE may cache the content of the blind detection (the content obtained by the blind detection, such as an incomplete or inaccurate control signal). And combined with the blind detection results of other secondary control signals to improve the probability of successful blind detection.

In this embodiment, according to step 1102, a control signal is obtained, and the repeatedly transmitted data signals can be combined and demodulated according to the resource allocation indicated by the control signal.

In an embodiment, as shown in FIG. 11, the method may further include:

Step 1103: The user equipment obtains, according to the detected control signal, a parameter configured by the network device for determining a data channel resource used by the retransmitted data signal, and a modulation and coding mode of the data signal, according to a preset The second rule determines the data channel resource used by the retransmitted data signal;

Step 1104: The user equipment combines and detects the retransmitted data signal according to the detected control signal.

In the present embodiment, the parameters for determining the data channel resources used by the retransmission data signal for the network device configuration have been described in detail in Embodiment 1, and the contents thereof are incorporated herein, and are not described herein again. .

In this embodiment, since the network device and the UE have previously agreed on a rule (second rule) for determining a data channel resource used for retransmitting the data signal, the UE may determine the weight according to the foregoing parameters configured by the network device. The data channel resource used to send the data signal.

The method of the present embodiment determines the repeated transmission according to a rule that presets resources (control channel resources and/or data channel resources) used for determining control signal and/or data signal retransmission, and corresponding parameters of network device configuration. Control channel resources of the control signal and/or data channel resources for repeatedly transmitting the data signal, thereby When data is received, the reliability of the control signal and the data signal transmission is improved by retransmitting the control signal and/or the data signal, and the flexibility of the control signal aggregation degree is increased; the control signal is reduced by using a preset rule. The overhead is reduced by the number and power consumption of the user's blind control signal.

Example 3

The embodiment of the present invention provides a data transmission device, which is configured on a network device. The principle of the device is similar to that of the first embodiment. The specific implementation may refer to the implementation of the method in the first embodiment. Repeat the explanation.

FIG. 12a is a schematic diagram of the data transmission device 1200 of the embodiment. As shown in FIG. 12a, the device 1200 includes: a configuration unit 1201, a determining unit 1202, and a sending unit 1203. The configuration unit 1201 is configured to determine parameters of the control channel resource and/or the data channel resource used by the retransmission control signal and/or the data signal; the determining unit 1202 determines the retransmission control signal according to the parameter and a preset rule. / or control channel resources and / or data channel resources used by the data signal; the transmitting unit 1203 repeatedly transmits the control on the control channel resources and / or data channel resources used by the retransmission control signal and / or data signal Signal and / or data signals.

In this embodiment, as shown in FIG. 12a, the apparatus 1200 may further include a setting unit 1204 that sets a rule for allocating resources of the retransmission control signal and/or the data signal as the preset rule. .

In an embodiment, the parameters for determining the control channel resource used by the retransmission control signal include: the number of retransmissions of the control signal R _{1, k} , the initial control channel element δ _{k of the} initial transmission of the control signal And the degree of polymerization L _k .

In this embodiment, as shown in FIG. 12b, the determining unit 1202 includes a first determining module 12021 and a second determining module 12022, and the first determining module 12021 is configured according to the R _{1, k} , the δ _k , and each control resource. The number N of control channel elements CCE included in the set CORESET and the preset rule determine a starting position of the CCE occupied by the rth transmission of the control signal; the second determining module 12022 according to the L _k and The starting position determines a control channel resource used for transmitting the control signal for the rth time.

In the present embodiment, the preset rules are expressed as:

In another embodiment, the parameters for determining the control channel resource used by the retransmission control signal include: the number of resource blocks occupied by the control signal in the frequency domain, I _k , and the resources occupied by the data signal in the frequency domain The number of blocks J _k , the number _r ρ _r of the first resource block occupied by the control signal for the _{rth time} .

In the present embodiment, as shown in FIG. 12c, a third determination unit determining module 1202 includes a fourth determination module 12024 and 12023, the third determination module 12023 within the _{I k, J k, ρ r} , system bandwidth resource blocks according to The total number M and the predetermined rule determine the number of the i th resource block occupied by the rth transmission of the control signal; the fourth determining module 12024 determines the number according to the I _k , J _k and the number The resource blocks occupied by the control signal are transmitted r times.

In the present embodiment, the preset rules are expressed as:

In another embodiment, the parameter used to determine the control channel resource used by the retransmission control signal includes: the number of resource blocks I _k occupied by the control signal, and the first time occupied by the rth transmission of the control signal The number of the resource block ρ _r .

In this embodiment, as shown in FIG. 12d, the determining unit 1202 includes a fifth determining module 12025 and a sixth determining module 12026, and the fifth determining module 12025 is configured according to the ρ _r , the total number M of resource blocks in the system bandwidth, and the The preset rule determines the number of the i th resource block occupied by the rth transmission of the control signal; the sixth determining module 12026 determines, according to the I _k and the number, that the r th transmit the control signal Resource block.

In the present embodiment, the predetermined rule is expressed as: (ρ _r + i) mod (M-1).

In another embodiment, the parameters for determining the data channel resource used by the retransmitted data signal include: the number of retransmissions of the data signal R _2,k , the number of symbols occupied by the data signal per time S _k , the start symbol s _{k of the} first transmitted data signal, the number of resource blocks J _k occupied in the frequency domain for each transmitted data signal, and the starting resource block η _{k of the} first transmitted data signal.

In this embodiment, as shown in FIG. 12e, the determining unit 1202 includes a seventh determining module 12027 and an eighth determining module 12028, and the seventh determining module 12027 is configured according to the R _2,k , the η _k , and the resources in the system bandwidth. The total number of blocks M and the predetermined rule determine the starting position of the resource block occupied by the data signal in the frequency domain for the rth time; the eighth determining module 12028 according to the S _k , s _k , J _k And the starting location determines a resource block occupied by the rth transmission of the data signal.

In the present embodiment, the preset rules are expressed as:

In another embodiment, the parameters for determining the data channel resource used by the retransmitted data signal include: the number of retransmissions of the data signal R _2,k , the number of symbols occupied by the data signal per time S _k , the starting symbol s _{k of the} first transmitted data signal, the number of resource blocks J _k occupied by the data signal in each frequency domain, the number of resource blocks occupied by the transmission control signal in the frequency domain I _k , the initial transmission The starting resource block η _{k of the} data signal, and the degree of polymerization L _k .

In the present embodiment, as shown in FIG. 12f, determination unit 1202 includes the ninth and tenth determination module 12029 120210 determination module, a determination module 12029 according to the ninth _{J k, I k, η k} , the system bandwidth resource block The total number M and the predetermined rule determine the starting position of the resource block occupied by the data signal in the frequency domain for the rth time; the tenth determining module 120210 is based on the S _k , s _k , J _k , I _k and the starting position determine a resource block occupied by the rth transmission of the data signal.

In the present embodiment, the predetermined rule is expressed as: (r × (J _k + I _k ) + η _k ) mod (M-1).

In the present embodiment, the precoder used by the transmitting unit 1203 to transmit the data signal is different each time.

The data transmission apparatus of the present embodiment performs data in advance by setting rules for determining resources (control channel resources and/or data channel resources) used for retransmission of control signals and/or data signals, and configuring corresponding parameters. During transmission, by retransmitting the control signal and/or the data signal, the reliability of the control signal and the data signal transmission is improved, and the flexibility of the control signal aggregation degree is increased; the control signaling overhead is reduced by using a preset rule. , reducing the number of times and power consumption of the user's blind detection control signal.

Example 4

The embodiment provides a network device, where the network device includes the data transmission device as described in Embodiment 3.

FIG. 13 is a schematic structural diagram of a network device according to an embodiment of the present invention. As shown in FIG. 13, network device 1300 can include a processor 1310 and a memory 1320; and a memory 1320 coupled to processor 1310. The memory 1320 can store various data; in addition, a program 1330 for information processing is stored, and the program 1330 is executed under the control of the processor 1310 to receive various information transmitted by the user equipment and to transmit the request information to the user equipment.

In one embodiment, the functionality of the data transfer device described in embodiment 3 may be integrated into central processor 1310. The processor 1310 may be configured to: configure parameters for determining control channel resources and/or data channel resources used by the retransmission control signal and/or the data signal; determining the weight according to the parameter and a preset rule Transmitting control channel resources and/or data channel resources used by control signals and/or data signals; repeatedly transmitting said control channel resources and/or data channel resources used by said retransmission control signals and/or data signals Control signals and / or data signals. The processor 1310 may be further configured to set a rule for allocating a retransmission control signal and/or a data signal resource as the foregoing preset rule.

In another embodiment, the data transmission device described in Embodiment 3 can be separately configured with the processor 1310. For example, the data transmission device described in Embodiment 3 can be configured as a chip connected to the processor 1310, and the function of the data transmission device described in Embodiment 3 can be realized by the control of the processor 1310.

In addition, as shown in FIG. 13, the network device 1300 may further include: a transceiver 1340, an antenna 1350, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It should be noted that the network device 1300 does not have to include all the components shown in FIG. 13; in addition, the network device 1300 may further include components not shown in FIG. 13, and reference may be made to the prior art.

The network device of this embodiment performs data transmission by pre-setting rules for determining resources (control channel resources and/or data channel resources) used for retransmission of control signals and/or data signals, and configuring corresponding parameters. By retransmitting the control signal and/or the data signal, the reliability of the control signal and the data signal transmission is improved, and the flexibility of the control signal aggregation degree is increased; the control signaling overhead is reduced by using a preset rule. The number and power consumption of the user's blind detection control signal is reduced.

Example 5

The embodiment of the present invention provides a data receiving device, which is configured on a user equipment. The principle of the device is similar to that of the second embodiment. The specific implementation may refer to the implementation of the method in the second embodiment. Repeat the explanation.

FIG. 14 is a schematic diagram of the data receiving apparatus 1400 of the present embodiment. As shown in FIG. 14, the apparatus 1400 includes: a first dividing unit 1401 and a first detecting unit 1402. The first dividing unit 1401 divides the control channel resource used by the retransmission control signal into a plurality of parts according to a preset first rule; the first detecting unit 1402 sequentially detects the control signal on each part of the control channel resource. If the control signal is detected on a portion of the control channel resources, the detection is terminated, otherwise the detected signal is buffered and combined with the signal detected on the next portion of the control channel resources until the control signal is detected.

In an embodiment, as shown in FIG. 14, the apparatus 1400 may further include: a second determining unit 1403 and a second detecting unit 1404. The second determining unit 1403 obtains, according to the control signal detected by the first detecting unit 1402, a parameter configured by the network device for determining a data channel resource used by the retransmission data signal, and a modulation and coding manner of the data signal, and is preset according to the preset The determined second rule determines the data channel resource used by the retransmitted data signal; the second detecting unit 1404 combines and detects the retransmitted data signal according to the control signal detected by the first detecting unit 1402.

The apparatus of this embodiment is configured according to a preset for determining a retransmission of a control signal and/or a data signal. a rule of a source (control channel resource and/or a data channel resource), and a corresponding parameter of the network device configuration, determining a control channel resource for repeatedly transmitting the control signal and/or a data channel resource for repeatedly transmitting the data signal, thereby performing data When receiving, by retransmitting the control signal and/or the data signal, the reliability of the control signal and the data signal transmission is improved, and the flexibility of the control signal aggregation degree is increased; the control signaling overhead is reduced by using a preset rule. , reducing the number of times and power consumption of the user's blind detection control signal.

Example 6

The embodiment provides a user equipment, where the user equipment includes the data receiving apparatus as described in Embodiment 5.

FIG. 15 is a schematic block diagram showing the system configuration of the user equipment 1500 according to the embodiment of the present invention. As shown in FIG. 15, the user device 1500 can include a processor 1510 and a memory 1520; the memory 1520 is coupled to the processor 1510. It should be noted that the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.

In one embodiment, the functionality of the data receiving device described in Embodiment 5 can be integrated into the processor 1510. The processor 1510 may be configured to: divide the control channel resource used by the retransmission control signal into multiple parts according to a preset first rule; and sequentially detect the control signal on each part of the control channel resource. If the control signal is detected on a portion of the control channel resources, the detection is terminated, otherwise the detected signal is buffered and combined with the signal detected on the next portion of the control channel resources until the control signal is detected.

In another embodiment, the data receiving apparatus described in Embodiment 5 may be configured separately from the processor 1510. For example, the data receiving apparatus described in Embodiment 5 may be configured as a chip connected to the processor 1510 through the processor 1510. The control implements the functions of the data receiving apparatus described in Embodiment 5.

As shown in FIG. 15, the user equipment 1500 may further include: a communication module 1530, an input unit 1540, a display 1550, and a power source 1560. It should be noted that the user equipment 1500 does not have to include all the components shown in FIG. 15; in addition, the user equipment 1500 may further include components not shown in FIG. 15, and reference may be made to the prior art.

As shown in FIG. 15, processor 1510, also sometimes referred to as a controller or operational control, can include a microprocessor or other processor device and/or logic device that receives input and controls various components of user device 1500. operating.

The memory 1520 may be, for example, a buffer, a flash memory, a hard drive, a removable medium, or a volatile memory. One or more of a reservoir, a non-volatile memory, or other suitable device. Various data can be stored, and programs for executing related information can be stored. And the processor 1510 can execute the program stored by the memory 1520 to implement information storage or processing and the like. The functions of other components are similar to those of the existing ones and will not be described here. The various components of user device 1500 may be implemented by special purpose hardware, firmware, software or a combination thereof without departing from the scope of the invention.

The user equipment of this embodiment determines the repetition according to a rule that presets resources (control channel resources and/or data channel resources) used for determining control signal and/or data signal retransmission, and corresponding parameters of network device configuration. Transmitting the control channel resources of the control signal and/or repeatedly transmitting the data channel resources of the data signal, thereby improving the reliability of the control signal and the data signal transmission by retransmitting the control signal and/or the data signal during data reception. The flexibility of the control signal aggregation degree is increased; the overhead of the control signaling is reduced by using a preset rule, and the number and power consumption of the user's blind detection control signal are reduced.

Example 7

The embodiment further provides a communication system, including the network device as described in Embodiment 4 and the user equipment as described in Embodiment 6.

Since the composition and function of the network device and the user equipment have been described in detail in the foregoing embodiments, the content thereof is incorporated herein, and details are not described herein again.

With the communication system of the present embodiment, the network device presets rules for determining resources (control channel resources and/or data channel resources) used for retransmission of control signals and/or data signals, and configuring corresponding parameters, When data transmission and reception are performed, the reliability of the control signal and the data signal transmission is improved by retransmitting the control signal and/or the data signal, and the flexibility of the control signal aggregation degree is increased; the control is reduced by using a preset rule. The overhead of signaling reduces the number and power consumption of the user's blind control signal.

The above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software. The present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps. The present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

The method/apparatus described in connection with the embodiments of the invention may be embodied directly in hardware, a software module executed by a processor, or a combination of both. For example, one or more of the functional block diagrams shown in Figure 12 and/or one of the functional block diagrams Or a plurality of combinations (for example, a configuration unit, a determining unit, a sending unit, and the like) may correspond to each software module of the computer program flow, or may correspond to each hardware module. These software modules may correspond to the respective steps shown in FIG. 2, respectively. These hardware modules can be implemented, for example, by curing these software modules using a Field Programmable Gate Array (FPGA).

The software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art. A storage medium can be coupled to the processor to enable the processor to read information from, and write information to, the storage medium; or the storage medium can be an integral part of the processor. The processor and the storage medium can be located in an ASIC. The software module can be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if a device (such as a mobile terminal) uses a larger capacity MEGA-SIM card or a large-capacity flash memory device, the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.

One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein. An application specific integrated circuit (ASIC), field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, or any suitable combination thereof. One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

The present invention has been described in connection with the specific embodiments thereof, and it should be understood by those skilled in the art that A person skilled in the art can make various modifications and changes to the present invention within the scope of the present invention.

Claims (20)

A data transmission device, wherein the device comprises: a configuration unit configured to determine parameters of control channel resources and/or data channel resources used by the retransmission control signal and/or the data signal; a determining unit that determines a control channel resource and/or a data channel resource used by the retransmission control signal and/or the data signal according to the parameter and a preset rule; And a transmitting unit that repeatedly transmits the control signal and/or the data signal on a control channel resource and/or a data channel resource used by the retransmission control signal and/or the data signal. The apparatus of claim 1, wherein the parameters for determining control channel resources used by the retransmission control signal comprise: The number of retransmissions of the control signal R _1,k , the initial control channel element δ _{k of the} first transmission of the control signal, and the degree of polymerization L _k . The apparatus of claim 2, wherein the determining unit comprises: a first determining module, configured to determine, according to the R _{1, k} , the δ _k , the number N of control channel elements CCE included in each control resource set CORESET, and the rule, to send the control signal for the rth time The starting position of the occupied CCE; a second determining module that determines a control channel resource used for transmitting the control signal for the rth time according to the L _k and the starting position. The apparatus of claim 3 wherein said rule is expressed as:

The apparatus of claim 1, wherein the parameters for determining control channel resources used by the retransmission control signal comprise: The number of resource blocks occupied by the control signal in the frequency domain I _k , the number of resource blocks occupied by the data signal in the frequency domain J _k , and the first resource block occupied by the rth transmission of the control signal The number ρ _r . The apparatus of claim 5, wherein the determining unit comprises: Third determining module, which determines the r-th transmission of the i-th control signals numbered resource blocks occupied by the total number of said M _{I k, J k, ρ r} , system bandwidth resource blocks and the rule; And a fourth determining module, which determines, according to the _Ik , _Jk and the number, a resource block occupied by the rth transmission of the control signal. The apparatus of claim 6 wherein said rule is expressed as:

The apparatus of claim 1, wherein the parameters for determining control channel resources used by the retransmission control signal comprise: The number of resource blocks I _k occupied by the control signal, and the number ρ _r of the first resource block occupied by the control signal for the _{rth time} . The apparatus of claim 8 wherein said determining unit comprises: a fifth determining module, configured to determine, according to the ρ _r , the total number M of resource blocks in the system bandwidth, and the rule, a number of the i th resource block occupied by the rth sending the control signal; And a sixth determining module, configured to determine, according to the _Ik and the number, a resource block occupied by the rth transmission of the control signal. The apparatus of claim 9 wherein said rules are expressed as: (ρ _r +i) mod(M-1). The apparatus of claim 1, wherein the parameters for determining data channel resources used by the retransmitted data signal comprise: The number of retransmissions R _{2,k of the} data signal, the number of symbols S _k occupied by the data signal each time, the start symbol s _{k of the} first transmission data signal, and the frequency domain occupied by each transmission data signal The resource block number J _k and the starting resource block η _{k of the} first transmitted data signal. The apparatus according to claim 11, wherein said determining unit comprises: a seventh determining module, configured to determine, according to the R _{2, k} , η _k , the total number M of resource blocks in the system bandwidth, and the rule, the starting position of the resource block occupied by the data signal in the frequency domain for the rth time ; And an eighth determining module, configured to determine, according to the S _k , s _k , J _k and the starting position, a resource block occupied by the rth transmission of the data signal. The apparatus of claim 12 wherein said rule is expressed as:

The apparatus of claim 1, wherein the parameters for determining data channel resources used by the retransmitted data signal comprise: The number of retransmissions R _{2,k of the} data signal, the number of symbols S _k occupied by the data signal each time, the start symbol s _k of the first transmission data signal, and the frequency signal occupied by each transmission data signal The number of resource blocks J _k , the number of resource blocks I _k occupied by the control signal in the frequency domain, and the starting resource block η _{k of the} first transmission data signal. The apparatus of claim 14, wherein the determining unit comprises: a ninth determining module, configured to determine, according to the J _k , I _k , η _k , the total number M of resource blocks in the system bandwidth, and the rule, the start of the resource block occupied by the r-th time in the frequency domain position; And a tenth determining module, which determines, according to the S _k , s _k , J _k , I _k and the starting position, a resource block occupied by the rth transmitting the data signal. The apparatus of claim 15 wherein said rule is expressed as: (r × (J _k + I _k ) + η _k ) mod (M-1). The apparatus of claim 1 wherein said network device uses a different precoder for transmitting data signals each time. A data receiving device, wherein the device comprises: a first dividing unit, which divides the control channel resource used by the retransmission control signal into a plurality of parts according to a preset first rule; a first detecting unit, which sequentially detects the control signal on each part of the control channel resource, and if the control signal is detected on a part of the control channel resource, ends the detection; otherwise, the detected signal is buffered, and Merging with signals detected on the next portion of the control channel resources until the control signal is detected. The device of claim 18, wherein the device further comprises: a second determining unit, configured to obtain, according to the detected control signal, a parameter configured by the network device for determining a data channel resource used by the retransmitted data signal, and a modulation and coding manner of the data signal, and according to a preset second The rules determine data channel resources used by the retransmitted data signal; The second detecting unit combines and detects the retransmitted data signal according to the detected control signal. A communication system comprising a network device and a user device, wherein the network device comprises the device of any of claims 1-17, the user device comprising the device of any one of claims 18-19.

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