WO2012167489A1

WO2012167489A1 - Method and apparatus for transmitting data

Info

Publication number: WO2012167489A1
Application number: PCT/CN2011/077669
Authority: WO
Inventors: 夏金环; 张兴炜
Original assignee: 华为技术有限公司
Priority date: 2011-07-27
Filing date: 2011-07-27
Publication date: 2012-12-13
Also published as: CN103026773A; CN103026773B

Abstract

A method, apparatus and system for transmitting data are disclosed in the embodiments of the present invention which refer to the technical field of communications. The method includes: informing each User Equipment (UE) of a two-dimension group of correlation information of the two-dimension group, wherein the two-dimension group contains at least two UEs and the correlation information of the two-dimension group is applied for indicating the situation of time-frequency resources of the two-dimension group occupied by each UE; sending Physical Downlink Control Channel PDCCH for indicating the time-frequency resources of the two-dimension group to each UE; transmitting data with each UE on the time-frequency resources of the two-dimension group occupied by each UE. By means of adopting scheduling manner of two-dimension group and subdividing Physical Resource Block (PRB) resources on time domain and frequency domain, the present invention can improve resources utilization rate in particular application scenes, and increase the number of scheduled UEs, thus saving PDCCH overhead when large-scale equipments need to be scheduled.

Description

Description of the method and device for transmitting data

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting data. Background technique

3GPP (The 3rd Generation Partnership Project) The scheduling mechanism adopted by the standards organization in the LTE (Long Term Evolution) protocol is unified by the eNB (Evolved Node Base station). Management control. When the eNB has downlink data to be sent, the eNB allocates appropriate resources to the UE according to the channel information fed back by the UE (User Equipment). When the UE needs to send uplink data, the UE sends a scheduling to the eNB. The information is requested to inform the eNB to allocate an uplink data transmission resource for the UE. Specifically, the eNB carries the uplink and downlink scheduling information of the UE in the PDCCH (Physical Downlink Control Channel), and is used to indicate time-frequency resource allocation information of the physical data channel of the UE, and corresponding modulation and coding information. The physical data channel includes a physical downlink shared channel (PDSCH) (Physical Downlink Shared Channel) and a physical uplink shared channel (PUSCH).

In the current LTE standard, the minimum unit of resource scheduling is a TTI (Transmission Time Interval), that is, one subframe (SubFrame, SF), and the time is lms, including two slots. Each time slot includes 7 or 6 OFDM (Orthogonal Frequency Division Multiplex) symbols. Here, 7 OFDM symbols are taken as an example. As shown in FIG. 1, the frequency bandwidth is different due to system bandwidth. Includes a different number of subcarriers. A PRE (Physical Resource Element) occupies one OFDM symbol in the time domain and occupies one subcarrier in the frequency domain, and one PRB (Physical Resource Block) occupies 7 OFDM symbols in the time domain. It occupies 12 subcarriers in the frequency domain. It is assumed that the time-frequency resource shown in FIG. 1 is a resource occupied by one downlink subframe, and the PDSCH, the PDCCH, and other control channels and physical layer signals occupy the common resources. The standard is used to schedule a UE by using one PDCCH channel. Which part of the PRB and the number of PRBs the UE uses for transmitting uplink data or downlink data is indicated to the UE through the PDCCH channel. Since the smallest scheduling unit is the TTI, when the eNB indicates that the UE occupies N PRBs, it means that the UE occupies N PRBs in the frequency domain of the first time slot, but also implies the second time slot internal frequency in the TTI. The N PRBs in the same location on the domain are also assigned to the UE, or the corresponding N PRBs in the second time slot mapped by a certain rule are assigned to the UE. In the prior art, in the time domain, except for OFDM symbols occupied by other control channels and physical signals, all remaining OFDM symbols in one TTI are allocated to the UE as resources for transmitting data, if the data transmitted by the UE The amount is relatively small, and the number of allocated OFDM symbols may not be fully utilized, which causes waste of resources and reduces system resource utilization. Summary of the invention

In order to solve the problem of waste of PRB resources in the prior art, embodiments of the present invention provide a method and device for transmitting data. The technical solution is as follows:

In one aspect, a method for transmitting data is provided, the method comprising: informing a UE of the two-dimensional group of related information of the two-dimensional group, the two-dimensional group comprising at least two UEs, the second The information about the dimension group is used to indicate that each of the UEs occupies the time-frequency resource of the two-dimensional group, and the related information of the two-dimensional group includes: a common identifier of the two-dimensional group Group-RNTI, The number of groups in the two-dimensional group, the index of the group in which each UE is located, and the index of each UE in the group in which each UE is located;

Transmitting, to each UE, a physical downlink control channel PDCCH indicating a time-frequency resource of the two-dimensional group;

Performing data transmission with each of the UEs on a time-frequency resource of a two-dimensional group occupied by each UE.

In another aspect, a network side device is provided, where the device includes:

a notification module, configured to notify the UE of the two-dimensional group of related information of the two-dimensional group, the two-dimensional group includes at least two UEs, and the related information of the two-dimensional group is used to indicate each of the The case where the UE occupies the time-frequency resource of the two-dimensional group, and the related information of the two-dimensional group includes: a common identifier Group-RNTI of the two-dimensional group, and a number of groups in the two-dimensional group, where each An index of the group in which the UE is located, an index of each UE in the group in which the UE is located, and a sending module, configured to send, to each of the UEs, a time-frequency resource for indicating the two-dimensional group Physical downlink control channel PDCCH;

And a transmitting module, configured to perform data transmission with each of the UEs on a time-frequency resource of a two-dimensional group occupied by each UE.

In one aspect, a method of transmitting data is also provided, the method comprising:

The first user equipment UE receives the information about the two-dimensional group sent by the network side device, the two-dimensional group includes at least two UEs, and the related information of the two-dimensional group is used to indicate that each UE in the two-dimensional group occupies the a case of a two-dimensional group of time-frequency resources, and the related information of the two-dimensional group includes: a common identifier Group-RNTI in the two-dimensional group, a number of groups in the two-dimensional group, where each UE is located Index of the group, the index of each UE in the group in which the UE is located; receiving a physical downlink control channel sent by the network side device to indicate time-frequency resources of the two-dimensional group

a PDCCH, the time-frequency resource of the two-dimensional group occupied by the first UE is learned according to the related information of the two-dimensional group; And performing data transmission on the time-frequency resource of the two-dimensional group occupied by the first UE by the network side device.

In another aspect, a first user equipment is further provided, where the first user equipment includes a receiving module, configured to receive related information of a two-dimensional group sent by the network side device, where the two-dimensional group includes at least two users. The device UE, the related information of the two-dimensional group is used to indicate that each UE in the two-dimensional group occupies the time-frequency resource of the two-dimensional group, and the related information of the two-dimensional group includes: the two-dimensional group The internal common identifier Group-RNTI, the number of groups in the two-dimensional group, the index of the group in which each UE is located, and the index of each UE in the group in which each UE is located;

The learning module is configured to receive a physical downlink control channel PDCCH that is used by the network side device to indicate the time-frequency resource of the two-dimensional group, and obtain the two-dimensional occupied by the first UE according to the related information of the two-dimensional group. a group of time-frequency resources; a transmission module, configured to perform data transmission with the network side device on a time-frequency resource of the two-dimensional group occupied by the first UE.

The technical solutions provided by the embodiments of the present invention have the following advantages: The two-dimensional group scheduling mode is used to subdivide the PRB resources in the time domain and the frequency domain, which not only improves resource utilization in a specific application scenario, but also increases scheduling. The number of UEs, thereby saving PDCCH overhead when large-scale terminals need scheduling. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

1 is a schematic diagram of time-frequency resources in an existing LTE standard;

2 is a flowchart of a method for transmitting data according to an embodiment of the present invention;

FIG. 3 is a flowchart of a method for transmitting data according to another embodiment of the present invention; FIG.

4 is a schematic diagram of a two-dimensional group according to another embodiment of the present invention;

FIG. 5 is a schematic diagram of a two-dimensional group allocated resource according to another embodiment of the present invention; FIG.

FIG. 6 is a schematic diagram of centralized resource allocation according to another embodiment of the present invention; FIG.

FIG. 7 is a schematic diagram of a network side device according to another embodiment of the present invention; FIG.

FIG. 8 is a flowchart of a method for transmitting data according to another embodiment of the present invention; FIG.

FIG. 9 is a flowchart of a method for transmitting data according to another embodiment of the present invention; FIG.

FIG. 10 is a schematic diagram of a first user equipment according to another embodiment of the present invention; detailed description

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 2, an embodiment of the present invention provides a method for transmitting data, including:

101: Informing the UE of the two-dimensional group, the two-dimensional group includes at least two UEs, and the related information of the two-dimensional group is used to indicate that each UE occupies the a case of a two-dimensional group of time-frequency resources, and the related information of the two-dimensional group includes: a common identifier Group-RNTI of the two-dimensional group, a common identifier in the two-dimensional group, and a number of groups, each An index of the group in which the UE is located, an index of each UE in the group in which each UE is located;

102: Send, to each of the UEs, a physical downlink control channel PDCCH, which is used to indicate time-frequency resources of the two-dimensional group; 103: two occupied by each UE in the two-dimensional group Data transmission on the time-frequency resources of the dimension group.

The technical solutions provided by the embodiments of the present invention have the following advantages: The two-dimensional group scheduling mode is used to subdivide the PRB resources in the time domain and the frequency domain, which not only improves resource utilization in a specific application scenario, but also increases scheduling. The number of UEs; thus saving PDCCH overhead when large-scale terminals need scheduling. Referring to FIG. 3, an embodiment of the present invention provides a method for transmitting data, including:

201: The network side device divides the N user equipment UEs into a two-dimensional group according to a predetermined policy.

In this embodiment, the network side device is described by taking an eNB as an example. When the eNB has downlink data to transmit, or when the UE has uplink data to be transmitted, the eNB divides certain UEs into a two-dimensional group according to a predetermined strategy, and the two-dimensional group is used to indicate the two-dimensional group. As shown in FIG. 4, a plurality of UEs, including U1, U12, U21, U22, ..., Ugl, and Ug2, are grouped in a large group identified by the Group-RNTI, Group. - RNTI is the common identifier of this large group, group scheduling information, ie PDCCH information, using this identifier to scrambling the cyclic redundancy check code (CRC), and the UE in the group determines the PDCCH in this identifier. Blind detection in the search space of the channel obtains the set of scheduling information, and unmasks the set of scheduling information. The predetermined policy here mainly refers to some policies of the application layer, for example, how many UEs and which UEs are required to use the group scheduling in a two-dimensional group, which belongs to the prior art, and is not specifically limited in this embodiment.

202: The eNB informs each UE in the two-dimensional group of the related information of the two-dimensional group.

In this embodiment, before group scheduling, each UE in the two-dimensional group needs to be notified about related information of the two-dimensional group, including: Group-RNTI, the number of groups g, and the index of the group where the UE is located (1, 2) , ··· ···, g), the index (1, 2) in the group where the UE is located. Specifically, the method for notifying the UE of the two-dimensional group information has two methods. The first method is to use RRC (Radio Resource Control) dedicated signaling to notify each UE, and the second method is to use MAC (Media Access Control, media access). Control) Signaling to each UE. In this embodiment, the related information of the two-dimensional group includes: a common identifier, a number of groups, an index of a group in which each UE in the two-dimensional group is located, and an index in a group in which each UE in the two-dimensional group is located. .

203: The eNB sends, to each UE in the two-dimensional group, a physical downlink control channel PDCCH that indicates the time-frequency resource of the two-dimensional group.

Among them, three types of resource allocation are defined in the LTE protocol: First, one bit is used to represent whether a PRB is assigned to the UE, such as 1 is assigned, 0 is not allocated, and how many PRBs are in the system. , how many bits need to be indicated. Second, consecutive P PRBs are called a PRB group, that is, RBG, and one bit is used to indicate whether each RBG is allocated. Third, use two indicators, one to indicate the starting position of the resource, and the other to indicate the length of the occupied resource. In this embodiment, the resource allocation in the group scheduling information that is masked by the group-RNTI can still adopt any one of the foregoing three types of allocations, which is not specifically limited in this embodiment.

In this embodiment, after obtaining the scheduling information, the UE can know that the scheduling information authorizes the group of UEs to occupy the shared channel resources according to the indication of the two-dimensional group, that is, how many PRBs are included in the frequency domain, and which PRBs are respectively corresponding to the resources. . Specifically, according to the two-dimensional group information, the UE first divides the PRB according to the number g of groups in the two-dimensional group in the frequency domain, and then obtains the corresponding equal-part PRB resource block according to the index of the group where the UE is located. In the time domain, one TTI is further halved, that is, each UE occupies 7 OFDM symbols in one slot, and the UE decides whether to occupy the first slot or the second according to its index in the group. Gap. As shown in FIG. 5, a three-group, two-dimensional group of two UEs occupy a schematic diagram of allocating resources, and the figure shows that each group allocates one PRB, where U11 and U12, U21 and U22, U31 and U32 are both Occupying the same TTI, U11 and U12 occupy the same subcarrier in the frequency domain, occupying two different time slots in one time domain in the time domain; U21 and U22 occupying subcarriers different from U11 and U12 in the frequency domain, in the time domain Different time slots are occupied in one cell; U31 and U32 occupy subcarriers different from U11 and U12 and U21 and U22 in the frequency domain. Here, the six UEs are a large group and are scheduled in the same ΤΤΙ.

204: The eNB and each UE in the two-dimensional group perform data transmission on a time-frequency resource occupied by the UE.

In this embodiment, optionally, the eNB and each UE in the two-dimensional group perform data transmission on the time-frequency resource occupied by the UE, including: 1) obtaining, according to the situation of receiving data of each UE, each UE Upstream HARQ (Hybrid Automatic)

Retransmission reQuest, hybrid automatic repeat request) feedback result; wherein, the HARQ feedback result includes: ACK/NACK (Acknowledgement / Negative Acknowledgement, correct confirmation or negative acknowledgement);

2) performing logical AND operations on the uplink HARQ feedback results of all UEs to obtain the final result of the uplink HARQ feedback;

3) feeding back the uplink HARQ feedback final result to each UE on a physical HARQ indicator channel PHICH channel.

The uplink HARQ is a feedback confirmation process of the network device for the uplink data; and the downlink HARQ is the UE for the downlink data. Feedback confirmation process.

In this embodiment, if the uplink resource authorization is performed according to the two-dimensional group, the group of UEs obtains the scheduling information and allocates the time-frequency resources occupied by each UE, and then according to the uplink and downlink channel timing relationship, in the corresponding uplink. Data transmission is performed on the PUSCH channel of the subframe, the eNB decodes the data, and feeds back ACK/NACK on the ffllCH channel of a subsequent downlink subframe. Specifically, in this embodiment, for two-dimensional group scheduling, the HARQ feedback of the uplink PUSCH data adopts a UE binding combined frequency division multiplexing manner. For example, a UE scheduled in two-dimensional group scheduling is assigned an identification code, and the identification code in the existing protocol uses a cyclic shift of the CAZAC sequence. If the identifiers of all UEs in the group are the same, the ACK/NACK feedback of the UEs mapped to the same PHICH channel in the same raiCH group is UE-bound, that is, between UEs. The ACK/NACK feedback uses a logical "AND", and the result is used as a feedback result corresponding to the identification code in the two-dimensional group. In this embodiment, group scheduling is used, and one UE is scheduled by one PDCCH, and the UEs in one group use the same identification code, so the feedback results of multiple UEs corresponding to the same identifier on the same PHICH channel can only be used. There is one, that is, the method of UE binding. If the six UEs shown in FIG. 5 are mapped to the same PHICH channel in the same ffllCH group, after the eNB decodes the data sent by each UE, if there is an error in the data sent by one UE, the ij eNB will use the NACK. The feedback is given to the six UEs in FIG. 5, wherein in the feedback information, the feedback result has only one NACK, but the feedback object includes the six UEs shown in FIG. 5 at the same time.

Further, in this embodiment, optionally, the eNB and each UE in the two-dimensional group perform data transmission on the time-frequency resource occupied by the UE, including: obtaining each according to the situation that the data of each UE is received. The uplink hybrid automatic repeat request of the UE is the HARQ feedback result; performing logical AND operations on the uplink HARQ feedback results of all the UEs in each group in the two-dimensional group to obtain the final result of the uplink HARQ feedback; and the final result of the uplink HARQ feedback is A physical HARQ indicator channel is fed back to each of the UEs on the PHICH channel. For example, when the number of UEs mapped to the same ffllCH channel and using the same identification code is relatively large, using an ACK/NACK feedback result as a representative may cause unnecessary feedback of many UEs, for example, as shown in FIG. If the feedback received by the six UEs is NACK, each UE needs to resend the data, but there may be an error when only the U22 sends the uplink data, but all the UEs bear this error, which increases the number of UEs. Unnecessary feedback from other UEs. To reduce the number of UEs that are not necessarily fed back, preferably, when resource allocation is performed for a large group, centralized resource allocation is employed. Centralized means: Resources are continuous in the frequency domain dimension with no gaps in between. The correspondence between the PUSCH and the ffllCH in the protocol is that the ACK/NACK feedback of the data on different PUSCH channels in the frequency domain is distributed in different PHICH groups, and the feedback of the UE in the group scheduling is placed in different raiCH groups. On the same channel, the number of UEs that need to be bound for feedback in one raiCH channel is reduced, so that the number of UEs that need to retransmit the subsequent feedback HARQ is less. As shown in FIG. 6, according to the mapping relationship between the PHICH and the PUSCH, the PHICH channels of different groups g can be mapped to different ffllCH groups, and the ACK/NACK feedback of the UEs mapped to the same PHICH channel in the same group is bound. , such as U11 and U12 are mapped to the same channel in ffllCH group 1. Up, U21 and U22 are mapped to the same channel in PHICH group 2, U31 and U32 are mapped to the same channel in PHICH group 3, and the number of UE binding feedback in FIG. 6 is reduced to 2, and FIG. 4 The number of UEs with UE binding feedback is 6.

The group scheduling and feedback scheme proposed in this embodiment is suitable for initial transmission of semi-persistent scheduling. When the feedback result is NACK, the eNB or UE will retransmit the previously transmitted data. Since the probability of retransmission of the UE in the group is relatively low, and there is no specific rule for the retransmission of the UE in the group, one UE is scheduled using one PDCCH for retransmission. However, for a UE with a small data packet, when the existing one-dimensional scheduling mode is used, the OFDM symbol allocated to the UE in the time dimension is not used, resulting in waste of resources. In this solution, for the retransmitted small data packet, the repetition factor F is defined, and is determined according to the number P of allocated OFDM symbols and the OFDM symbol Q occupied by the retransmitted data packet of the UE, F = floor (P/Q), Floor () means rounding down. The eNB maps the time-domain according to the repetition factor in the resource mapping, that is, repeatedly codes the data packet according to the repetition factor, so that the data packet sufficiently occupies the transmission resource allocated by the UE, and then transmits the required retransmission. The data. Therefore, performing data transmission with the UE in the two-dimensional group on the transmission resource occupied by the UE, the method further includes: when receiving a negative acknowledgement NACK information fed back by the UE, according to the second occupied by the UE The number of orthogonal frequency division multiplexing OFDM symbols in the time-frequency resource of the dimension group and the number of OFDM symbols occupied by the data packet to be retransmitted, to obtain a repetition factor; and the data packet to be retransmitted according to the repetition factor The time-frequency resource of the two-dimensional group occupied by the UE is repeatedly coded, so that the data packet that needs to be retransmitted sufficiently occupies the time-frequency resource of the two-dimensional group occupied by the one UE; and the transmission needs to be retransmitted. data pack.

Optionally, in this embodiment, the eNB and the UE in the two-dimensional group perform data transmission on the time-frequency resource occupied by the UE, and further include: obtaining, according to the situation that the data of each UE is received, each UE. Uplink hybrid automatic repeat request HARQ feedback result; uplink HARQ feedback results of all UEs in each group in the two-dimensional group are respectively fed back to each of the physical HARQ indicator channel PHICH channels in a time division multiplexing manner Each UE in the group.

In the embodiment of the present invention, the HARQ feedback on the uplink PUSCH of the group scheduling may also adopt the FDM+TDM (frequency division multiplexing + time division multiplexing) manner, including:

1. When the uplink PUSCH resources are allocated, the corresponding feedback resources of each group are distributed in different ffllCH groups, that is, frequency division multiplexing is adopted, and the feedback of each group is distributed in different ffllCH groups;

2. For the uplink data of each UE in the group, the feedback sent to the UE may be in the TDM mode, and the UE occupies the raiCH channel of the corresponding downlink subframe according to its own sequence index.

FDD (Frequency Division Duplex): The feedback occurs at n+4+K, where K corresponds to the index of the UE in the group. Here, the UE transmits uplink data on the nth subframe PUSCH, the feedback occurs in the n + 4 + K subframe, 4 is defined in the current LTE protocol, and the feedback on the uplink data of the n subframe occurs in the n + 4 subframes.

TDD (Time Division Duplex): The feedback occurs at n + k + K, k corresponding to each uplink and downlink ratio When the middle feedback occurs, K corresponds to the index of the UE in the group, and the feedback is in the Kth downlink subframe after n+k. Specifically, when the uplink data is transmitted on the PUSCH of the nth subframe, when a UE is scheduled, the feedback should occur in the n + k subframe, but is now group scheduling. For example, there are two UEs in the group, K=0, 1. Then the feedback of the first UE should occur in the n+k+0 subframe, and the feedback moment of the second UE occurs in the η+k+1 subframe. .

In the embodiment of the present invention, the number of UEs in the two-dimensional group is two. In fact, the number of UEs in the group can be configured as needed, and multiple UEs can be configured, and the number of UEs in each group can also be different. The group scheduling information is used to indicate that a time-frequency resource is used by a group. The UE in the group allocates the frequency domain and the time domain resource equally according to the group information, and the UE occupies the corresponding resource location according to its own index position. In fact, there is no need to evenly allocate resources. When group scheduling, directly indicate the time-frequency position and size required by each UE in the group. In this manner, different resource sizes and locations can be allocated to each UE as needed, but the number of bits to be indicated is large and the overhead is large.

Further, in this embodiment, the groups are allocated in the frequency domain, each group occupies one PRB, and the UEs in the group allocate the number of OFDM symbols occupied by each group within one TTI. This method mainly considers that one side is compatible with the existing protocol. On the other hand, considering that one UE can not use the number of OFDM symbols in one TTI, it is not necessary to allocate more PRBs in the frequency domain. In fact, this method can be further extended. In the frequency domain, the number of subcarriers can be allocated as the granularity, or the RBG can be allocated as the granularity. In the time domain, the UEs in the group can be allocated with the OFDM symbol as the granularity, or The allocation is performed in the granularity of time slots or subframes.

The related information of the two-dimensional group is further used to indicate that each of the UEs occupies a feedback resource of a two-dimensional group; and then receives, on a feedback resource of the two-dimensional group occupied by each UE, the UE Downstream HARQ feedback results.

The method of the present invention provides the following advantages: The two-dimensional group scheduling mode is used to subdivide the PRB resources in the time domain and the frequency domain, which not only improves resource utilization in a specific application scenario, but also increases scheduling. The number of UEs; thus saving PDCCH overhead when large-scale terminals need scheduling. At the same time, a new feedback mechanism is added in the group scheduling, and one feedback result can correspond to multiple UEs, thereby solving the problem of limited feedback resources. Referring to FIG. 7, an embodiment of the present invention provides a network side device, including: a notification module 301, a sending module 302, and a transmission module 303.

The notification module 301, the related information for the two-dimensional group is used to notify each UE in the two-dimensional group, the two-dimensional group includes at least two UEs, and the related information of the two-dimensional group is used to indicate the each The case where the UE occupies the time-frequency resource of the two-dimensional group, and the related information of the two-dimensional group includes: a common identifier Group-RNTI of the two-dimensional group, and a number of groups in the two-dimensional group, where each An index of the group in which the UE is located, an index of each UE in the group in which the UE is located, and a sending module 302, configured to send, to each UE, a time-frequency resource for indicating the two-dimensional group Physical downlink control channel PDCCH; The transmission module 303 is configured to perform data transmission with each of the UEs on a time-frequency resource of a two-dimensional group occupied by each UE.

The notification module 301, the transmitting module 302, and the transmission module 303 may be processors, respectively. The network side device may specifically be a base station eNB.

In this embodiment, the transmission module 303 includes:

a first receiving unit, configured to obtain an uplink hybrid automatic repeat request HARQ feedback result of each UE according to the situation that the data of each UE is received;

a first obtaining unit, configured to perform a logical AND operation on the uplink HARQ feedback result of all the UEs to obtain an uplink HARQ feedback final result;

And a first sending unit, configured to feed back, to the each UE, the final result of the uplink HARQ feedback on a physical HARQ indicator channel PHICH channel.

Further, optionally, in this embodiment, the transmission module 303 includes:

a second receiving unit, configured to obtain, according to the situation that the data of each UE is received, an uplink hybrid automatic repeat request HARQ feedback result of each UE;

a second acquiring unit, configured to perform logical AND operations on uplink HARQ feedback results of all UEs in each group in the two-dimensional group to obtain an uplink HARQ feedback final result;

And a second sending unit, configured to feed back, to the each UE, the final result of the uplink HARQ feedback on a physical HARQ indicator channel PHICH channel.

Optionally, the transmission module 303 includes:

a third receiving unit, configured to obtain, according to the situation that the data of each UE is received, an uplink hybrid automatic repeat request HARQ feedback result of each UE;

a third sending unit, configured to respectively feed back uplink HARQ feedback results of all UEs in each group in the two-dimensional group to each of the groups in a time division multiplexing manner on one physical HARQ indicator channel PHICH channel Every UE.

The above eight units may be units in the processor, respectively.

In this embodiment, the related information of the two-dimensional group is further used to indicate that each of the UEs occupies a feedback resource of the two-dimensional group;

And a receiving module, configured to receive a downlink HARQ feedback result of each UE on a two-dimensional group of feedback resources occupied by each UE.

The receiving module may be a processor.

Optionally, the transmission module 303 in this embodiment is further configured to:

When receiving a negative acknowledgement NACK information fed back by the UE, according to the time of the two-dimensional group occupied by the one UE The number of orthogonal frequency division multiplexing OFDM symbols in the frequency resource and the number of OFDM symbols occupied by the data packet to be retransmitted, to obtain a repetition factor;

Repetitively encoding, on the time-frequency resource of the two-dimensional group occupied by the one UE, according to the repetition factor, so that the data packet that needs to be retransmitted occupies the occupied one of the UEs a two-dimensional group of time-frequency resources; transmitting the data packets that need to be retransmitted.

The beneficial effects of the device embodiments provided by the present invention are as follows: a two-dimensional group scheduling mode, which subdivides PRB resources in both the time domain and the frequency domain, not only improves resource utilization in a specific application scenario, but also increases scheduled UEs. The number; thus saving PDCCH overhead when large-scale terminals need scheduling. Referring to FIG. 8, an embodiment of the present invention provides a method for transmitting data, including:

401: The first user equipment UE receives related information of a two-dimensional group sent by the network side device, where the two-dimensional group includes at least two UEs, and the related information of the two-dimensional group is used to indicate each UE in the two-dimensional group. A case of occupying the time-frequency resource of the two-dimensional group, and the related information of the two-dimensional group includes: a common identifier Group-RNTI in the two-dimensional group, a number of groups in the two-dimensional group, and each of the groups An index of a group in which the UE is located, an index of each UE in a group in which each UE is located;

And receiving, by the network side device, a physical downlink control channel PDCCH, which is used to indicate the time-frequency resource of the two-dimensional group, and obtaining, according to the information about the two-dimensional group, the two-dimensional group occupied by the first UE. Time-frequency resources;

403: Perform data transmission with the network side device on a time-frequency resource of a two-dimensional group occupied by the first UE.

The beneficial effects of the device embodiments provided by the present invention are as follows: The two-dimensional group scheduling mode is used to subdivide the PRB resources in the time domain and the frequency domain, which not only improves resource utilization in a specific application scenario, but also increases scheduling. The number of UEs; thus saving PDCCH overhead when large-scale terminals need scheduling.

The first UE described in this embodiment of the present invention is also the current UE. The current UE may be any of the two-dimensional groups. Referring to FIG. 9, an embodiment of the present invention provides a method for transmitting data, including:

501: The user equipment receives the information about the two-dimensional group sent by the network side device, and after receiving the PDCCH that is sent by the network side device to indicate the time-frequency resource of the two-dimensional group, obtains the PDCCH according to the information about the two-dimensional group. Time-frequency resources occupied.

Preferably, in this embodiment, as described in the foregoing embodiment, the network side device divides the UE into a two-dimensional group, and notifies the information about the two-dimensional group of the UE in each two-dimensional group by signaling, the two-dimensional group Including at least two UEs, the UE in this embodiment may be any one of the two-dimensional groups, and the related information of the two-dimensional group is used to indicate that each UE in the two-dimensional group occupies the time-frequency of the two-dimensional group. The case of the resource, and the related information of the two-dimensional group includes:: the common identifier in the two-dimensional group Group-RNTI, the number of groups in the two-dimensional group, the index of the group in which each UE is located, and the index of each UE in the group in which each UE is located.

In this embodiment, after receiving the scheduling information, the user equipment learns the time-frequency resources occupied by the two-dimensional group according to the related information of the two-dimensional group, including: in the frequency domain, according to the number of groups in the two-dimensional group The index of the own team, determine the physical resource block PRB that it occupies; In the time domain, according to its own index in the group, determine that it occupies the first time slot or the second time slot, so as to know the time occupied by itself. Frequency resources.

In this embodiment, the two-dimensional group scheduling information is used to indicate that a time-frequency resource is used by one group, and the UE in the group allocates the frequency domain and the time domain resource equally according to the group information, and the UE occupies the corresponding resource location according to its own index position. . In fact, there is no need to evenly allocate resources. When group scheduling, directly indicate the time-frequency position and size of each UE in the group. In this way, different resource sizes and locations can be allocated for each UE as needed, but the number of bits to be indicated is large and the overhead is large.

502: The user equipment and the network side device perform data transmission on the time-frequency resource occupied by the user equipment.

Preferably, in this embodiment, the user equipment and the network side device perform data transmission on the time-frequency resource occupied by the network side device, including: sending downlink HARQ feedback of the UE on the reserved resource of the physical uplink shared channel PUSCH Result: if there is an uplink data transmission on the PUSCH, sending a downlink HARQ feedback result of the UE on a part of resources in the reserved resource that is used to transmit data; if there is no uplink data transmission on the PUSCH, the UE is used The downlink HARQ feedback result is repeatedly coded on the reserved resource, so that the downlink HARQ feedback result of the UE sufficiently occupies the reserved resource, and the downlink HARQ feedback result of the UE is transmitted.

In this embodiment, after receiving the scheduling information, the UE that is divided into a two-dimensional group by the eNB learns the time-frequency resources occupied by the UE according to the related information of the two-dimensional group, and receives the resource position indicated by the scheduling information. The data is decoded, and ACK/NACK is fed back on the PUSCH channel of the corresponding uplink subframe according to the uplink and downlink channel timing relationship. In this embodiment, for the two-dimensional group scheduling, the HARQ feedback of the downlink PDSCH data is pre-allocated, and the PUSCH group scheduling resource feedback is occupied. The downlink PDSCH occurs in the nth subframe, and the feedback occurs in the n+4th subframe (FDD); or the downlink PDSCH occurs in the nth subframe, the feedback occurs in the n+kth subframe (TDD), and k corresponds to the TDD. When the mode is different, the upper and lower ratios take different values.

In this embodiment, the HARQ feedback of the downlink PDSCH data adopts a semi-persistent scheduling manner, and the HARQ feedback resource of the downlink PDSCH is predefined. The resource allocation is similar to the resource group scheduling of the PUSCH, and the UE can identify each large group and the large group. Feedback resources occupied by UEs in the group. The semi-persistent scheduling mode means that as long as the downlink group scheduling is defined and the downlink data transmission is performed, the resource transmission feedback information is reserved on the uplink PUSCH channel in a predefined manner, and the downlink data feedback is transmitted on the PUSCH channel. The way to reserve resources is the same as the way in which the above two-dimensional group scheduling allocates PUSCH resources. When there is uplink data transmission, ACK/NACK is transmitted in the position where there is data, and when there is no data transmission, since it is allocated

For the PUSCH resource, the ACK/NACK information is repeated several times to fill the PUSCH resource, so that the PUSCH feedback information can be improved. Accurate transmission degree can ensure that resources allocated by PUSCH are not wasted.

Optionally, in this embodiment, the related information of the two-dimensional group is further used to indicate that each UE occupies a feedback resource of a two-dimensional group; the UE learns the UE according to the related information of the two-dimensional group. The two-dimensional group of the feedback resources are occupied, and the downlink HARQ feedback result of the UE is sent on the two-dimensional group of the feedback resources occupied by the UE.

Further, optionally, performing data transmission with the network side device on the transmission resource occupied by the network side device includes: when receiving the negative acknowledgement NACK information fed back by the network side device, according to the occupied by the UE The number of orthogonal frequency division multiplexing OFDM symbols in the time-frequency resource of the two-dimensional group and the number of OFDM symbols occupied by the data packet to be retransmitted, to obtain a repetition factor; according to the repetition factor for the data packet that needs to be retransmitted Repetitive coding is performed on the time-frequency resource of the two-dimensional group occupied by the UE, so that the data packet that needs to be retransmitted sufficiently occupies the time-frequency resource of the two-dimensional group occupied by the UE; and the transmission needs to be retransmitted. data pack.

The group scheduling and feedback scheme proposed in this embodiment is suitable for initial transmission of semi-persistent scheduling. When the feedback is

When NACK, the eNB or UE will retransmit the previously transmitted data. Since the probability of retransmission of the UE in the group is relatively low, and there is no specific rule for the retransmission of the UE in the group, one UE is scheduled using one PDCCH for retransmission. However, for a UE with a small data packet, when the one-dimensional scheduling mode is used, the OFDM symbol allocated to the UE in the time dimension is not used, resulting in waste of resources. In this solution, for the retransmitted small data packet, the repetition factor F is defined, and the number of OFDM symbols allocated by the resource and the OFDM symbol Q occupied by the retransmitted data packet of the UE are determined, F = floor (P/Q ), floor () is rounded down. The UE maps in the time domain according to the repetition factor when the resource is mapped, that is, the data packet that needs to be retransmitted is repeatedly coded according to the repetition factor, so that the data packet fully occupies the transmission resource occupied by itself; and then the transmission needs to be heavy. Passed data.

In the embodiment of the present invention, the HARQ feedback on the downlink PDSCH of the group scheduling may also adopt the FDM+TDM (frequency division multiplexing + time division multiplexing) manner, similar to the HARQ feedback of the uplink PUSCH; each group corresponds to different HACK feedback. The resource, the S卩PUCCH channel; the HARQ feedback of the different UEs in each group adopts the TDM, and the specific details are the same as the HARQ feedback of the uplink PUSCH, which is not described in this embodiment.

The method of the present invention provides the following advantages: The two-dimensional group scheduling mode is used to subdivide the PRB resources in the time domain and the frequency domain, which not only improves resource utilization in a specific application scenario, but also increases scheduling. The number of UEs; thus saving PDCCH overhead when large-scale terminals need scheduling. At the same time, a new feedback mechanism is added in the group scheduling, and one feedback result can correspond to multiple UEs, thereby solving the problem of limited feedback resources. Referring to FIG. 10, an embodiment of the present invention provides a first user equipment, including: a receiving module 601, a learning module 602, and a transmitting module 603.

The receiving module 601 is configured to receive related information of a two-dimensional group sent by the network side device, where the two-dimensional group includes at least two The user equipment UE, the related information of the two-dimensional group is used to indicate that each UE in the two-dimensional group occupies the time-frequency resource of the two-dimensional group, and the related information of the two-dimensional group includes: a common identifier Group-RNTI in the dimension group, a number of groups in the two-dimensional group, an index of the group in which each UE is located, and an index of each UE in the group in which each UE is located;

The learning module 602 is configured to receive a physical downlink control channel PDCCH that is used by the network side device to indicate the time-frequency resource of the two-dimensional group, and learn, according to the information about the two-dimensional group, the first user equipment Time-frequency resources of a two-dimensional group;

The transmission module 603 is configured to perform data transmission with the network side device on a time-frequency resource of a two-dimensional group occupied by the first user equipment.

The receiving module 601, the learning module 602, and the transmitting module 603 can each be a processor. The user equipment of this embodiment may be various types of terminals including, but not limited to, a mobile phone, a laptop computer, and a tablet computer.

Preferably, the learning module 602 is specifically configured to: determine, in the frequency domain, the physical resource block PRB occupied by the UE according to the number of groups in the two-dimensional group and the index of the group in which the UE is located;

In the time domain, according to the index of the UE in the group, it is determined that the UE occupies the first time slot or the second time slot, so as to know the time-frequency resources occupied by the UE.

Optionally, the related information of the two-dimensional group is further used to indicate that the each UE occupies a two-dimensional group of feedback resources;

a feedback module, configured to learn, according to the information about the two-dimensional group, the two-dimensional group of the feedback resources occupied by the UE, and send the downlink HARQ feedback result of the UE on the two-dimensional group of the feedback resources occupied by the UE .

The feedback module can be a processor.

Preferably, the transmission module 603 in this embodiment is specifically configured to:

Transmitting the downlink HARQ feedback result of the UE on the reserved resource of the physical uplink shared channel PUSCH; if there is uplink data transmission on the PUSCH, sending the UE on the part of the reserved resource that is used to transmit data Downstream HARQ feedback results;

If there is no uplink data transmission on the PUSCH, the downlink HARQ feedback result of the UE is repeatedly coded on the reserved resource, so that the downlink HARQ feedback result of the UE sufficiently occupies the reserved resource, and is transmitted. The downlink HARQ feedback result of the UE.

Optionally, the transmission module 603 is further configured to:

When receiving the negative acknowledgement NACK information fed back by the network side device, the number of orthogonal frequency division multiplexing OFDM symbols in the time-frequency resource of the two-dimensional group occupied by the UE and the data packet that needs to be retransmitted are occupied. Number of OFDM symbols, Obtaining a repetition factor;

Repetitively encoding the data packet that needs to be retransmitted on the time-frequency resource of the two-dimensional group occupied by the UE according to the repetition factor, so that the data packet that needs to be retransmitted sufficiently occupies two occupied by the UE Time-frequency resources of the dimension group;

Transmitting the data packet that needs to be retransmitted.

Referring to FIG. 11, an embodiment of the present invention further provides a system for transmitting data, including: the network side device 300 as described above and the first user equipment 400 as described above.

The beneficial effects of the device embodiments provided by the present invention are as follows: The two-dimensional group scheduling mode is used to subdivide the PRB resources in the time domain and the frequency domain, which not only improves resource utilization in a specific application scenario, but also increases scheduling. The number of UEs; thus saving PDCCH overhead when large-scale terminals need scheduling. The device and the system provided in this embodiment are the same as the method embodiment, and the specific implementation process is described in detail in the method embodiment, and details are not described herein again. A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium. The storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

Claims

Claim

A method for transmitting data, the method comprising:

Informing the UE of the two-dimensional group of the two-dimensional group, the two-dimensional group includes at least two UEs, and the related information of the two-dimensional group is used to indicate that each of the UEs occupy the two-dimensional The case of the time-frequency resource of the group, and the related information of the two-dimensional group includes: a common identifier Group-RNTI of the two-dimensional group, a number of groups in the two-dimensional group, and a group in which each UE is located Index of the UE in the group in which each UE is located;

The method according to claim 1, wherein the data transmission is performed on the time-frequency resource of each two-dimensional group occupied by each UE, including:

Obtaining an uplink hybrid automatic repeat request HARQ feedback result of each UE according to the situation of receiving the data of each UE;

Performing a logical AND operation on the uplink HARQ feedback result of all the UEs to obtain an uplink HARQ feedback final result; and feeding back the uplink HARQ feedback final result to each of the physical HARQ indicator channel PHICH channels.

UE o

Performing a logical AND operation on the uplink HARQ feedback results of all UEs in each group in the two-dimensional group to obtain an uplink HARQ feedback final result;

And transmitting the final result of the uplink HARQ feedback to each of the physical HARQ indicator channel PHICH channels

UE o

The method according to claim 1, wherein the performing data transmission with each UE on the time-frequency resource of the two-dimensional group occupied by each UE includes:

Obtaining an uplink hybrid automatic repeat request (HARQ feedback) of each UE according to the situation of receiving the data of each UE fruit;

The uplink HARQ feedback results of all UEs in each group in the two-dimensional group are respectively fed back to each UE in each group in a time division multiplexing manner on one physical HARQ indicator channel PHICH channel.

The method according to any one of claims 1 to 4, wherein the related information of the two-dimensional group is further used to indicate that each of the UEs occupies a feedback resource of a two-dimensional group;

Then the method further includes:

And receiving downlink HARQ feedback results of each UE on the two-dimensional group of feedback resources occupied by each UE.

The method according to any one of claims 1 to 5, wherein the each and the UE are in each of

Data transmission on the time-frequency resource of the two-dimensional group occupied by the UE, including:

When receiving a negative acknowledgement NACK information fed back by the UE, the number of orthogonal frequency division multiplexing OFDM symbols in the time-frequency resources of the two-dimensional group occupied by the one UE and the OFDM symbols occupied by the data packets that need to be retransmitted are used. Quantity, get the repetition factor;

Repetitively encoding the data packet that needs to be retransmitted on the time-frequency resource of the two-dimensional group occupied by the one UE according to the repetition factor, so that the data packet that needs to be retransmitted occupies the occupied one of the UEs a two-dimensional group of time-frequency resources; transmitting the data packets that need to be retransmitted.

A network side device, the device comprising:

a notification module, configured to notify the UE of the two-dimensional group of related information of the two-dimensional group, the two-dimensional group includes at least two UEs, and the related information of the two-dimensional group is used to indicate each of the The case where the UE occupies the time-frequency resource of the two-dimensional group, and the related information of the two-dimensional group includes: a common identifier Group-RNTI of the two-dimensional group, a number of groups in the two-dimensional group, and each An index of a group in which the UE is located, an index of each UE in a group in which each UE is located;

a sending module, configured to send, to each UE, a physical downlink control channel PDCCH for indicating a time-frequency resource of the two-dimensional group;

And a transmission module, configured to perform data transmission with each of the UEs on a time-frequency resource of a two-dimensional group occupied by each UE.

The device according to claim 7, wherein the transmission module comprises: a first receiving unit, configured to obtain an uplink hybrid automatic retransmission of each UE according to the situation that the data of each UE is received Request HARQ feedback results; a first acquiring unit, configured to perform logical AND operations on uplink HARQ feedback results of all UEs to obtain an uplink HARQ feedback final result;

And a first sending unit, configured to feed back, to the each UE, a final result of the uplink HARQ feedback on a physical HARQ indicator channel PHICH channel.

The device according to claim 7, wherein the transmission module comprises: a second receiving unit, configured to obtain an uplink hybrid automatic retransmission of each UE according to the situation of receiving the data of each UE Request HARQ feedback results;

And a second sending unit, configured to feed back the uplink HARQ feedback final result to each of the UEs on a physical HARQ indicator channel PHICH channel.

The device according to claim 7, wherein the transmission module comprises: a third receiving unit, configured to obtain an uplink hybrid automatic retransmission of each UE according to the situation that the data of each UE is received Request HARQ feedback results;

The device according to any one of claims 7 to 10, wherein the related information of the two-dimensional group is further used to indicate that each of the UEs occupies a feedback resource of a two-dimensional group;

Then the device further includes:

The device according to any one of claims 7 to 11, wherein the transmitting module is further configured to: when receiving a negative acknowledgement NACK information fed back by a UE, according to the occupied by the one UE The number of orthogonal frequency division multiplexing OFDM symbols in the two-dimensional group of time-frequency resources and the number of OFDM symbols occupied by the data packets that need to be retransmitted, to obtain a repetition factor;

And the data packet that needs to be retransmitted is on the time-frequency resource of the two-dimensional group occupied by the one UE according to the repetition factor. Performing repetitive coding, so that the data packet that needs to be retransmitted sufficiently occupies a time-frequency resource of the two-dimensional group occupied by the one UE; and transmitting the data packet that needs to be retransmitted.

13. A method of transmitting data, the method comprising:

The first user equipment UE receives related information of the two-dimensional group sent by the network side device, where the two-dimensional group includes at least two

The UE, the related information of the two-dimensional group is used to indicate that each UE in the two-dimensional group occupies the time-frequency resource of the two-dimensional group, and the related information of the two-dimensional group includes: a common identifier Group-RNTI, a number of groups in the two-dimensional group, an index of a group in which each UE is located, and an index of each UE in a group in which each UE is located;

Receiving, by the network side device, a physical downlink control channel PDCCH, which is used to indicate the time-frequency resource of the two-dimensional group, and learning, according to the information about the two-dimensional group, a time-frequency of the two-dimensional group occupied by the first UE. Resource

And performing data transmission on the time-frequency resource of the two-dimensional group occupied by the first UE by the network side device.

The method according to claim 13, wherein the obtaining the time-frequency resource of the two-dimensional group occupied by the first UE according to the information about the two-dimensional group comprises:

Determining the first in the frequency domain according to the number of groups in the two-dimensional group and the index of the group in which the first UE is located

Physical resource block occupied by the UE PRB;

In the time domain, according to the index of the first UE in the group, determining that the first UE occupies the first time slot or the second time slot.

The method according to claim 13 or 14, wherein the two-dimensional group of related information is further used to indicate that each of the UEs occupies a two-dimensional group of feedback resources;

Then the method further includes:

And obtaining, according to the information about the two-dimensional group, the two-dimensional group of the feedback resources that are occupied by the first UE, and sending the downlink HARQ feedback of the first UE on the two-dimensional group of the feedback resources that are occupied by the first UE. result.

The method according to claim 13 or 14, wherein the data transmission by the network side device on the time-frequency resource of the two-dimensional group occupied by the first UE comprises:

Transmitting the downlink HARQ feedback result of the first UE on the reserved resource of the physical uplink shared channel PUSCH; if there is uplink data transmission on the PUSCH, sending the part of the reserved resource that is used to transmit data Downlink HARQ feedback result of the first UE; If there is no uplink data transmission on the PUSCH, the downlink HARQ feedback result of the first UE is repeatedly coded on the reserved resource, so that the downlink HARQ feedback result of the first UE fully occupies the reservation And transmitting the downlink HARQ feedback result of the first UE.

The method according to any one of claims 13 to 16, wherein the network side device performs data transmission on a time-frequency resource of a two-dimensional group occupied by the first UE, including :

When receiving the negative acknowledgement NACK information fed back by the network side device, according to the number of orthogonal frequency division multiplexing OFDM symbols in the time-frequency resource of the two-dimensional group occupied by the first UE, and the data packet that needs to be retransmitted The number of OFDM symbols occupied, and the repetition factor is obtained;

Repetitively encoding the data packet that needs to be retransmitted on the time-frequency resource of the two-dimensional group occupied by the first UE according to the repetition factor, so that the data packet that needs to be retransmitted fully occupies the first The time-frequency resource of the two-dimensional group occupied by the UE; transmitting the data packet that needs to be retransmitted.

A first user equipment (UE), wherein the first user equipment includes: a receiving module, configured to receive related information of a two-dimensional group sent by the network side device, where the two-dimensional group includes at least two users. The device UE, the related information of the two-dimensional group is used to indicate that each UE in the two-dimensional group occupies the time-frequency resource of the two-dimensional group, and the related information of the two-dimensional group includes: the two-dimensional group The internal common identifier Group-RNTI, the number of groups in the two-dimensional group, the index of the group in which each UE is located, the index of each UE in the group in which each UE is located; the learning module, Receiving, by the network side device, a physical downlink control channel PDCCH, which is used to indicate the time-frequency resource of the two-dimensional group, and obtaining, according to the information about the two-dimensional group, a time-frequency of a two-dimensional group occupied by the first UE. And a transmission module, configured to perform data transmission with the network side device on a time-frequency resource of the two-dimensional group occupied by the first UE.

The device according to claim 18, wherein the learning module is specifically configured to: in the frequency domain, according to the number of groups in the two-dimensional group and the index of the group in which the first UE is located, Determining the first

Physical resource block occupied by the UE PRB;

In the time domain, according to the index of the first UE in the group, determining that the first UE occupies the first time slot or the second time slot, so as to learn the time-frequency resources occupied by the first UE.

The device according to claim 18 or 19, wherein the related information of the two-dimensional group is further used to refer to The case where each UE occupies a feedback resource of a two-dimensional group;

Then the device further includes:

a feedback module, configured to learn, according to the information about the two-dimensional group, the two-dimensional group of the feedback resources that are occupied by the first UE, and send the first information on the two-dimensional group of the feedback resources occupied by the first UE Downlink HARQ feedback result of the UE.

The device according to claim 18 or 19, wherein the transmitting module is specifically configured to: send a downlink HARQ feedback result of the first UE on a reserved resource of a physical uplink shared channel PUSCH; The uplink data transmission is performed on the PUSCH, and the downlink HARQ feedback result of the first UE is sent on a part of resources in the reserved resource that is used to transmit data;

If there is no uplink data transmission on the PUSCH, the downlink HARQ feedback result of the first UE is repeatedly coded on the reserved resource, so that the downlink HARQ feedback result of the first UE fully occupies the reservation And transmitting the downlink HARQ feedback result of the first UE.

The device according to any one of claims 18 to 21, wherein the transmitting module is further configured to: when receiving the negative acknowledgement NACK information fed back by the network side device, according to the a number of orthogonal frequency division multiplexing OFDM symbols in a time-frequency resource of a two-dimensional group occupied by a UE and an OFDM symbol number occupied by a data packet to be retransmitted, to obtain a repetition factor;