WO2016165599A1

WO2016165599A1 - Ue supporting multiuser superposition, and method and device in base station

Info

Publication number: WO2016165599A1
Application number: PCT/CN2016/079009
Authority: WO
Inventors: 张晓博
Original assignee: 上海朗帛通信技术有限公司
Priority date: 2015-04-15
Filing date: 2016-04-12
Publication date: 2016-10-20
Also published as: CN106160960A; CN106160960B

Abstract

Disclosed are a UE supporting multiuser superposition, and a method and a device in a base station. In a first step, a UE separately receives K radio signal groups on K carriers, wherein each radio signal group comprises a first radio signal and a second radio signal, and K is a positive integer; and in a second step, an operation on a first wireless resource is determined on the basis that whether at least the second radio signal is correctly decoded, wherein time-frequency resources occupied by the first radio signal and time-frequency resources occupied by the second radio signal in the same radio signal group are entirely or partially overlapped. The present invention helps a base station determine an interference level caused by overlapped signals, and further, a proper policy is selected for retransmission. In addition, the present invention reduces overheads of wireless resources occupied by HARQ_ACK bits.

Description

Method and device in UE and base station supporting multi-user superposition

Technical field

The present invention relates to a transmission scheme in a wireless communication system, and more particularly to a method and apparatus for HARQ (Hybrid Automatic Repeat reQuest) for multi-position superposition based on Long Term Evolution (LTE-Long Term Evolution) . In particular, a communication method and apparatus for split multiplexing.

Background technique

In the traditional 3GPP (3rd Generation Partner Project) cellular system, the downlink wireless signals of multiple users are through {TDM (Time Division Multiplexing), FDM (Frequency Division Multiplexing). ), one or more of CDM (Code Division Multiplexing) is implemented. A new research topic (RP-150496)-downlink multi-user overlay is introduced in 3GPP R (Release, Release) 13, which uses the difference in transmission power to distinguish the downlink wireless signals of two users. The two users usually include a near user (ie, close to the base station) and a far user (ie, far from the base station), and the base station allocates a lower transmission power for the first signal for the near user, and is the first for the remote user. The second signal distributes a higher transmit power. The far user directly demodulates the second signal (that is, the first signal is treated as noise), and the near user first demodulates the second signal (taking into account that the near-user farther user has lower path loss, the probability of successful decoding is high. Then, the interference of the second signal is removed from the received signal to obtain a residual signal, and the remaining signal is decoded to obtain a first signal, which is a SIC (Successive Interference Cancellation) algorithm. In order to perform SIC, the near user needs to obtain scheduling information for the first signal and the second signal - and the far user may only need to obtain scheduling information for the second signal.

It should be noted that the specific implementation manner of the foregoing SIC algorithm is determined by the UE (User Equipment) manufacturer. As an alternative or supplement to the SIC, the near UE (or the far UE) can use the IRC (Interference Rejection Combining) algorithm to whiten the superimposed wireless signal to improve the receiving performance. The IRC algorithm does not require the UE to correctly decode the interfering wireless signal, and only needs to estimate the channel parameters of the interfering wireless signal.

The HARQ is an important technology in the LTE system. The downlink transmission is used as an example. The UE feeds back the HARQ_ACK to indicate whether the TB (Transport Block) is correctly decoded. The base station receives the HARQ_ACK. If the HARQ_ACK is NACK and the maximum number of retransmissions is not reached, the base station sends a retransmission signal of the transport block, and the version information of the retransmission signal is indicated by physical layer signaling.

Summary of the invention

The inventors found through research that for multi-user superposition, the traditional HARQ scheme cannot reflect whether the near user correctly decodes the superimposed interference signal (ie, the wireless signal for the far user). The base station determines whether the UE correctly decodes the superposed interference signal, which may bring the following advantages:

- If the near user erroneously decodes the superimposed interference signal, the base station may transmit a retransmission signal of the corresponding transport block (for example, when the far user also erroneously decodes the corresponding transport block), and notify the scheduling information of the retransmission signal to the near The user assists the near user in performing the SIC operation.

- When a near user erroneously decodes a useful signal (ie, the target recipient is the near user), the base station can determine the level of interference experienced by the useful signal, and in turn (assisted) determine (for the useful signal) retransmission The size of the time-frequency resource occupied by the signal.

The inventors have further discovered through research that the possibility of near-user erroneous decoding of the superimposed interference signal is very low. If the conventional HARQ_ACK scheme is adopted, only a small part of the reserved air interface resources for transmitting HARQ_ACK may be used for transmitting NAK. , wasting air resources.

In response to the above problems, the present invention provides a solution. It should be noted that, in the case of no conflict, the features in the embodiments and embodiments in the UE of the present application can be applied to the base station, and vice versa. Further, the features of the embodiments and the embodiments of the present application may be combined with each other arbitrarily without conflict.

The invention discloses a method in a UE supporting multi-user superposition, which comprises the following steps:

Step A. respectively receiving K wireless signal groups on K carriers, wherein each wireless signal group comprises a first wireless signal and a second wireless signal, said K being a positive integer

Step B. Determine the operation on the first radio resource based on whether at least the second radio signal is correctly decoded.

The time-frequency resource occupied by the first wireless signal in the same wireless signal group and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap. First wireless signal The target recipient is the UE, and the target recipient of the second wireless signal is a terminal other than the UE.

In the above method, the UE (when needed) uses the operation on the first radio resource to indicate whether the second radio signal is correctly received, and the auxiliary base station performs subsequent scheduling.

As an embodiment, a target recipient of a given wireless signal refers to a terminal corresponding to a signaling identity of scheduling signaling for a given wireless signal. As a sub-embodiment, the signaling identifier is a RNTI (Radio Network Temporary Identity), and the signaling identifier is used for a CRC (Cyclic Redundancy Check) of the scheduling signaling. ) Scrambling code.

As an embodiment, the number of TBs included in the first wireless signal is greater than one.

As an embodiment, the first wireless resource is shared by multiple terminals.

As an embodiment, the K is 1.

As an embodiment, in the step A, the UE first receives the second wireless signal, then cancels the interference of the second wireless signal by using the SIC algorithm, and then receives the first wireless signal.

As an embodiment, the first wireless signal and the second wireless signal are both transmitted on a PDSCH (Physical Downlink Shared Channel).

As an embodiment, the first radio resource does not exceed one subframe in the time domain, and does not exceed one PRB (Physical Resource Block) in the frequency domain, and includes an OCC (Orthogonal Covering Code) in the code domain. Pay the cover code) code.

As an embodiment, the first radio resource is a PUCCH (Physical Uplink Control Channel). As an embodiment, the first radio resource is a part of time-frequency resources in a PUSCH (Physical Uplink Shared Channel).

Specifically, according to an aspect of the invention, the step B comprises the following steps:

Step B1. Transmitting a third wireless signal on the first wireless resource, wherein at least one target wireless signal group exists in the K wireless signal groups, and the first wireless signal, the second wireless signal of the target wireless signal group } are all erroneously decoded by the UE; or zero transmission power is maintained on the first radio resource, wherein the {first radio signal, the second radio signal} of each of the K radio signal groups At least one wireless signal is correctly decoded by the UE.

As an embodiment, the third wireless signal is a sequence of features. As an embodiment, the third wireless signal includes at least one of {ZadOff-Chu sequence, pseudo-random sequence, information bit} One.

In the above aspect, the third wireless signal is used to indicate whether the target wireless signal group exists in the K wireless signal groups, instead of indicating whether the second wireless signal in each of the wireless signal groups is correctly received. . In view of the fact that the probability that the second wireless signal is erroneously decoded is low (i.e., the probability of including more than one of the target wireless signal groups in the K wireless signal groups is not high), the above aspects save the first wireless resource. Overhead.

Specifically, in accordance with an aspect of the present invention, the step B further includes the following steps:

Step B2. transmitting a fourth wireless signal on the second wireless resource, the fourth wireless signal indicating whether each of the K wireless signal groups is correctly decoded.

As an embodiment, the second radio resource and the first radio resource are orthogonal. As an embodiment, the second radio resource is a PUCCH. As an embodiment, the second radio resource is a part of time-frequency resources in one PUSCH.

As an embodiment, the base station jointly determines the target wireless signal group according to the third wireless signal and the fourth wireless signal, that is, if the base station detects the third wireless signal, the base station considers all the first wireless (indicated by the fourth wireless signal) The wireless signal group in which the signals are erroneously decoded is the target wireless signal group.

Step B3. transmitting a fifth wireless signal on the first wireless resource, the fifth wireless signal indicating one of the following for each of the wireless signal groups:

- the UE correctly decodes the first wireless signal

- the UE erroneously decodes the first wireless signal and correctly decodes the second wireless signal

The UE erroneously decodes the first wireless signal and the second wireless signal.

The above aspect uses explicit signaling to indicate whether interference of the second wireless signal in each of the wireless signal groups results in erroneous decoding of the first wireless signal. The above aspects require more first radio resources, but the advantage is that the base station can clearly know the target radio signal group.

As an embodiment, the first wireless signal includes one TB, and each of the wireless signal groups corresponds to two information bits in the fifth wireless signal, and the four states of the two information bits have the following meanings:

- state one. The UE correctly decodes the first wireless signal

- State 2. The UE erroneously decodes the first wireless signal and correctly decodes the second wireless signal. The number of PRBs required for the retransmission signal of the first wireless signal is the first integer.

- State 3. The UE erroneously decodes the first wireless signal and correctly decodes the second wireless signal. The number of PRBs required for the retransmission signal of the first wireless signal is a second integer.

- State 4. The UE erroneously decodes the first wireless signal and the second wireless signal.

In the foregoing embodiment, the UE further distinguishes the reception quality of the first wireless signal by using the second state and the third state, which is beneficial for the base station to select a suitable coding rate for the retransmission signal.

Specifically, according to an aspect of the present invention, the method further includes the following steps:

- Step C. Receive the target signal. The target signal is a retransmission signal of an associated TB of a second wireless signal in a given set of wireless signals, and a decoding operation is performed on the first wireless signal in the given set of wireless signals in accordance with the target signal.

The given wireless signal group is one of the K wireless signal groups, and the {first wireless signal, the second wireless signal} of the given wireless signal group is erroneously decoded by the UE.

Specifically, according to an aspect of the present invention, the step C includes the following steps:

Step C1. Receive first signaling, the first signaling indicating scheduling information of the target signal.

The scheduling information includes a {HARQ process number, transport block information}.

As an embodiment, the scheduling information includes a frequency domain resource occupied by the target signal. In one embodiment, the transport block information includes at least one of {MCS (Modulation and Coding Status), RV (Redundancy Version), and NDI (New Data Indicator). Kind. As an embodiment, the first signaling is physical layer signaling. As an embodiment, the first signaling is scheduling signaling of the target signal.

The invention discloses a method in a base station supporting multi-user superposition, which comprises the following steps:

- Step A. Send L radio signal groups. K of the L wireless signal groups are respectively transmitted on K carriers, wherein each wireless signal group includes a first wireless signal and a second wireless signal, the K is a positive integer, and the L is not a positive integer less than K

Step B. Detecting a wireless signal on the first wireless resource to assist in determining whether the second wireless signal is correctly decoded.

The time-frequency resource occupied by the first wireless signal in the same wireless signal group and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap. The target receiver of the first wireless signal in the K wireless signal groups is the first UE, and the K wireless signal groups The target recipient of the second wireless signal is a terminal other than the first UE.

As an embodiment, the K is 1. As an embodiment, the L is equal to the K. In one embodiment, the L is greater than the K, and the target receiver of the first wireless signal in the LK wireless signal groups other than the K wireless signal groups in the L wireless signal groups is the first UEs other than the UE.

Step B1: detecting a third wireless signal on the first wireless resource, determining that at least one target wireless signal group exists in the L wireless signal groups, and the first wireless signal, the second wireless signal of the target wireless signal group The signal} is erroneously decoded by the target receiver; or the third wireless signal is not detected on the first wireless resource, and the first wireless signal of each of the L wireless signal groups is determined. At least one of the wireless signals is correctly decoded by the target receiver.

As an embodiment, the first wireless resource is shared by multiple terminals.

Step B2. Receiving a fourth wireless signal on the second wireless resource, the fourth wireless signal indicating whether each of the K wireless signal groups is correctly decoded.

Step B3. Receiving a fifth wireless signal on the first wireless resource, the fifth wireless signal indicating one of the following for each of the K wireless signal groups:

- The first UE correctly decodes the first wireless signal

- the first UE erroneously decodes the first wireless signal and correctly decodes the second wireless signal

The first UE erroneously decodes the first wireless signal and the second wireless signal.

- Step C. Send the target signal. The target signal is a retransmission signal of an associated TB of a second wireless signal in a given set of wireless signals.

The given wireless signal group is one of the K wireless signal groups, and the first wireless signal of the given wireless signal group is erroneously decoded by the first UE.

As an embodiment, the fifth wireless signal indicates that the second wireless signal of the given set of wireless signals is erroneously decoded by the first UE.

As an embodiment, the base station detects a third wireless signal on the first wireless resource.

As an embodiment, the second wireless signal of the given wireless signal group is received by the target The error is decoded.

Step C1. Sending first signaling, the first signaling indicating scheduling information of the target signal.

As an embodiment, the signaling identifier of the first signaling is allocated by higher layer signaling to a terminal other than the first UE.

The invention discloses a user equipment supporting multi-user overlay, wherein the following modules are included:

a first module: configured to respectively receive K wireless signal groups on K carriers, wherein each wireless signal group includes a first wireless signal and a second wireless signal, the K being a positive integer

a second module: operative to determine an operation on the first wireless resource based on whether at least the second wireless signal is correctly decoded.

The time-frequency resource occupied by the first wireless signal in the same wireless signal group and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap. The target recipient of the first wireless signal is the UE, and the target recipient of the second wireless signal is a terminal other than the UE.

As an embodiment, in the foregoing user equipment:

The second module is further configured to send a third wireless signal on the first wireless resource, where at least one target wireless signal group exists in the K wireless signal groups, and the first wireless signal group of the target wireless signal group is second. The wireless signal} is erroneously decoded by the UE; or zero transmission power is maintained on the first radio resource, wherein the first wireless signal, the second wireless signal of each of the K wireless signal groups At least one of the wireless signals in the } is correctly decoded by the UE.

The invention discloses a base station device supporting multi-user superposition, wherein the following modules are included:

The first module is used to send L wireless signal groups. K of the L wireless signal groups are respectively transmitted on K carriers, wherein each wireless signal group includes a first wireless signal and a second wireless signal, the K is a positive integer, and the L is not a positive integer less than K

The second module is configured to detect a wireless signal on the first wireless resource to assist in determining whether the second wireless signal is correctly decoded.

The time-frequency resource occupied by the first wireless signal in the same wireless signal group and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap. The K wireless letters The target recipient of the first wireless signal in the group is the first UE, and the target recipient of the second wireless signal in the K wireless signal group is a terminal other than the first UE.

As an embodiment, in the foregoing base station device:

The second module is further configured to detect a third wireless signal on the first wireless resource, determine that at least one target wireless signal group exists in the L wireless signal groups, and the first wireless signal group of the target wireless signal group The second wireless signal is erroneously decoded by the target receiver; or the third wireless signal is not detected on the first wireless resource, and the {first wireless signal of each of the L wireless signal groups is determined, At least one of the second wireless signals is correctly decoded by the target recipient.

Compared with the prior art, the present invention has the following technical advantages:

- The base station is able to determine the level of interference caused by the superimposed signals, thereby selecting the appropriate strategy for retransmission

-. Saves the overhead of the radio resources occupied by the HARQ_ACK bits.

DRAWINGS

Other features, objects, and advantages of the present invention will become more apparent from the Detailed Description of Description

1 shows a flow chart of scheduling of downlink multi-user overlays in accordance with one embodiment of the present invention;

2 shows a flow chart of operation of a UE on a first radio resource, in accordance with one embodiment of the present invention;

3 shows a flow diagram of a base station selecting a given set of wireless signals in accordance with one embodiment of the present invention;

4 shows a HARQ timing diagram in accordance with one embodiment of the present invention;

FIG. 5 is a block diagram showing the structure of a processing device in a UE according to an embodiment of the present invention; FIG.

6 is a block diagram showing the structure of a processing device in a base station according to an embodiment of the present invention;

detailed description

The technical solutions of the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be mutually exclusive. combination.

Example 1

Embodiment 1 illustrates a scheduling flowchart of downlink multi-user overlay, as shown in FIG. In Figure 1, base station N1 is the maintenance base station of the serving cell of UE U2, wherein the steps in block F1 are optional steps.

For the base station N1 , L radio signal groups are transmitted in step S11. K of the L wireless signal groups are respectively transmitted on K carriers, wherein each wireless signal group includes a first wireless signal and a second wireless signal, the K is a positive integer, and the L is not A positive integer less than K. A wireless signal is detected on the first wireless resource in step S12 to assist in determining whether the second wireless signal is correctly decoded.

For UE U2 , the K wireless signal groups are received in step S21. The operation on the first radio resource is determined in step S22 based on whether at least the second wireless signal is correctly decoded.

In the first embodiment, the time-frequency resources occupied by the first wireless signal in the same wireless signal group and the time-frequency resources occupied by the second wireless signal are all or partially overlapped. The target recipient of the first wireless signal in the K wireless signal groups is UE U2. The target recipient of the second wireless signal in the K wireless signal groups is a terminal other than the first UE.

If L is greater than K, the target recipients of the L-K radio signal groups are other UEs.

As a sub-embodiment 1 of the first embodiment, the UE U2 transmits a third wireless signal on the first wireless resource and a fourth wireless signal on the second wireless resource in the step S22 (the third wireless signal and the fourth wireless signal are as follows) The HARQ_ACK in Figure 1 is shown). Wherein at least one target wireless signal group exists in the K wireless signal groups, the {first wireless signal, the second wireless signal} of the target wireless signal group are all erroneously decoded by the UE U2, and the fourth wireless signal indicates the Whether each of the K wireless signal groups is correctly decoded. The base station detects the third wireless signal and receives the fourth wireless signal in step S12.

As a sub-embodiment 2 of Embodiment 1, UE U2 maintains zero transmission power on the first radio resource and transmits a fourth radio signal on the second radio resource in step S22 (the fourth radio signal is as shown in HARQ_ACK in FIG. 1) Show). At least one of the {first wireless signal, second wireless signal} of each of the K wireless signal groups is correctly decoded by the UE. The base station N1 detects the third wireless signal and receives the fourth wireless signal in step S12.

As sub-embodiment 3 of Embodiment 1, UE U2 is on the first radio resource in step S22. Sending a fifth wireless signal, the fifth wireless signal indicating one of the following for each of the wireless signal groups:

- the UE correctly decodes the first wireless signal

The base station N1 detects the fifth wireless signal in step S12.

Example 2

Embodiment 2 illustrates a flow chart of the operation of the UE on the first radio resource, as shown in FIG. Embodiment 2 is an operation flow on the UE side.

The UE determines in step S221 whether or not at least one target radio signal group exists in the K radio signal groups in the present invention. If so, the UE transmits a third wireless signal on the first wireless resource in step S222; if not, the UE maintains zero transmission power on the first wireless resource in step S223. The UE transmits a fourth wireless signal on the second wireless resource in step S224, the fourth wireless signal indicating whether each of the K wireless signal groups is correctly decoded.

In Embodiment 2, the target wireless signal group refers to a wireless signal group in which both the first wireless signal and the second wireless signal are erroneously decoded by the UE.

As sub-embodiment 1 of the second embodiment, the second embodiment is a detailed implementation step of the step S22 in the first embodiment.

Example 3

Embodiment 3 illustrates a flow chart for a base station to select a given set of wireless signals, as shown in FIG. Embodiment 3 is an operation on the base station side.

The base station detects the third wireless signal on the first radio resource in step S121. If the third wireless signal is detected, the base station determines, according to the received fourth wireless signal, the L wireless signals in the present invention in step S122. The wireless signal group in which the first wireless signal is erroneously decoded in the group (the target recipient may include multiple UEs) is the target wireless signal group. If the third wireless signal is detected, the base station determines in step S123 that the given wireless signal group in the present invention is all wireless signal groups in the target wireless signal group that satisfy the following conditions:

The second wireless signal is erroneously decoded by the corresponding target recipient (different from the target recipient of the first wireless signal) and the corresponding TB has not reached the maximum number of retransmissions.

In Embodiment 3, a retransmission of an associated TB of a second wireless signal in a given wireless signal group The number (i.e., the target signal in the present invention) is capable of satisfying the needs of both the target recipient of the second wireless signal and the target recipient of the first wireless signal.

As sub-embodiment 1 of the third embodiment, the third embodiment is a detailed implementation step of the step S12 in the first embodiment.

Example 4

Embodiment 4 illustrates a HARQ timing diagram as shown in FIG. In FIG. 4, the subframe S1 identified by the oblique line is a transmission subframe of the first wireless signal and the second wireless signal, and the subframe S2 identified by the back oblique line is a subframe to which the first radio resource belongs, and the sub-frame identified by the cross-line Frame S3 is a transmission subframe of the target signal.

In Embodiment 4, the base station transmits K wireless signal groups to the first UE in subframe S1, wherein each wireless signal group includes a first wireless signal and a second wireless signal, and the K is a positive integer. The base station detects the third wireless signal in the present invention or the fifth wireless signal in the present invention on the first radio resource in the subframe S2 to determine the given wireless signal group in the present invention. The base station transmits a target signal in subframe S3, the target signal being a retransmission signal of a second wireless signal (associated TB) in the given set of wireless signals.

As a sub-embodiment 1 of Embodiment 4, the target signal is a non-superimposed wireless signal.

As a sub-embodiment 2 of Embodiment 4, the target signal and the retransmission signal of the corresponding first wireless signal (the associated TB) are superimposed.

As a sub-embodiment 3 of the embodiment 4, the target signal and the wireless signal other than the retransmission signal of the corresponding first wireless signal (the associated TB) are superimposed.

Example 5

Embodiment 5 exemplifies a structural block diagram of a processing device in one UE, as shown in FIG. In FIG. 5, the UE processing apparatus 200 is mainly composed of a first receiving module 201, a first sending module 202, and a second receiving module 203, wherein the second receiving module 203 is optional.

The first receiving module 201 is configured to respectively receive K wireless signal groups on the K carriers, where each wireless signal group includes a first wireless signal and a second wireless signal, and the K is a positive integer. The first sending module 202 is configured to determine an operation on the first radio resource according to whether at least the second wireless signal is correctly decoded.

In Embodiment 5, the time-frequency resources occupied by the first wireless signal in the same wireless signal group and the time-frequency resources occupied by the second wireless signal are all or partially overlapped. The target recipient of the first wireless signal is the UE, and the target recipient of the second wireless signal is the UE External terminal. The first wireless signal and the second wireless signal are transmitted on the PDSCH.

As a sub-embodiment 1 of Embodiment 5, the first sending module 202 is further configured to send a third wireless signal on the first wireless resource, where at least one target wireless signal group exists in the K wireless signal group, the target The {first wireless signal, the second wireless signal} of the wireless signal group are all erroneously decoded by the UE; or zero transmission power is maintained on the first wireless resource, wherein each of the K wireless signal groups At least one of the {first wireless signal, second wireless signal} of the group is correctly decoded by the UE.

As a sub-embodiment 2 of Embodiment 5, the first sending module 202 is further configured to send a fourth wireless signal on the second wireless resource, where the fourth wireless signal indicates each of the K wireless signal groups. Whether it is correctly decoded.

As a sub-embodiment 3 of the embodiment 5, the first sending module 202 is further configured to send a fifth wireless signal on the first wireless resource, and for each of the wireless signal groups, the fifth wireless signal indicates one of the following:

- the UE correctly decodes the first wireless signal

As a sub-embodiment 4 of the embodiment 5, the UE processing apparatus 200 further includes a second receiving module 203, and the second receiving module 203 is configured to receive the first signaling and the target signal. The target signal is a retransmission signal of an associated TB of a second wireless signal in a given set of wireless signals, and a decoding operation is performed on the first wireless signal in the given set of wireless signals in accordance with the target signal. The given wireless signal group is one of the K wireless signal groups, and the {first wireless signal, the second wireless signal} of the given wireless signal group is erroneously decoded by the UE. The first signaling indicates scheduling information of the target signal, and the scheduling information includes a {HARQ process number, transport block information}.

Example 6

Embodiment 6 exemplifies a structural block diagram of a processing device in a base station, as shown in FIG. In FIG. 6, the base station processing apparatus 300 is mainly composed of a second sending module 301, a third receiving module 302, and a third sending module 303, wherein the third sending module 303 is optional.

The second sending module 301 is configured to send L radio signal groups. K of the L wireless signal groups are respectively transmitted on K carriers, wherein each wireless signal group includes a first wireless signal and a second wireless signal, the K is a positive integer, and the L is greater than K's positive Integer. The third receiving module 302 is configured to detect a wireless signal on the first wireless resource to assist in determining whether the second wireless signal is correctly decoded. The third sending module 303 is configured to send a target signal. The target signal is a retransmission signal of an associated TB of a second wireless signal in a given set of wireless signals.

In Embodiment 6, the time-frequency resources occupied by the first wireless signal in the same wireless signal group and the time-frequency resources occupied by the second wireless signal are all or partially overlapped. The target receiver of the first wireless signal in the K wireless signal groups is the first UE, and the target receiver of the second wireless signal in the K wireless signal groups is a terminal other than the first UE. The given set of wireless signals is one of the K sets of wireless signals, and the first wireless signal of the given set of wireless signals is erroneously decoded by the first UE. The first radio resource is a PUCCH resource.

As a sub-embodiment 1 of the embodiment 6, the third receiving module 302 is further configured to detect the third wireless signal on the first radio resource. If the third wireless signal is detected, the third receiving module 302 determines that at least one target wireless signal group exists in the L wireless signal groups, and the {first wireless signal, the second wireless signal} of the target wireless signal group are The target receiver (which may be sent by a UE other than the first UE, or may be sent by multiple UEs) is erroneously decoded; otherwise, the third receiving module 302 determines each of the L wireless signal groups. At least one of the {first wireless signal, second wireless signal} is correctly decoded by the target receiver.

One of ordinary skill in the art can appreciate that all or part of the above steps can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium such as a read only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module unit in the above embodiment may be implemented in hardware form or in the form of a software function module. The application is not limited to any specific combination of software and hardware. The UE or the terminal in the present invention includes, but is not limited to, a wireless communication device such as a mobile phone, a tablet computer, a notebook, an internet card, and an automobile. The base station in the present invention includes, but is not limited to, a macro communication base station, a micro cell base station, a home base station, a relay base station, and the like.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All modifications, equivalents, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

A method in a UE supporting multi-user overlay, comprising the following steps:

Step A. respectively receiving K wireless signal groups on K carriers, wherein each wireless signal group comprises a first wireless signal and a second wireless signal, said K being a positive integer

Step B. determining an operation on the first radio resource based on whether at least the second wireless signal is correctly decoded;

The time-frequency resource occupied by the first wireless signal in the same wireless signal group and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap; the target receiver of the first wireless signal is the UE, and the second The target recipient of the wireless signal is a terminal other than the UE.
The method in a UE supporting multi-user overlay according to claim 1, wherein the step B comprises the following steps:

Step B1. Transmitting a third wireless signal on the first wireless resource, wherein at least one target wireless signal group exists in the K wireless signal groups, and the first wireless signal, the second wireless signal of the target wireless signal group } are all erroneously decoded by the UE; or zero transmission power is maintained on the first radio resource, wherein the {first radio signal, the second radio signal} of each of the K radio signal groups At least one wireless signal is correctly decoded by the UE.
The method of the UE supporting multi-user superposition according to claim 1 or 2, wherein the step B further comprises the following steps:

Step B2. transmitting a fourth wireless signal on the second wireless resource, the fourth wireless signal indicating whether each of the K wireless signal groups is correctly decoded.
The method of claim 1, wherein the step B further comprises the following steps:

Step B3. transmitting a fifth wireless signal on the first wireless resource, the fifth wireless signal indicating one of the following for each of the wireless signal groups:

- the UE correctly decodes the first wireless signal

- the UE erroneously decodes the first wireless signal and correctly decodes the second wireless signal

The UE erroneously decodes the first wireless signal and the second wireless signal.
The method in a UE supporting multi-user overlay according to any one of claims 1 to 4, further comprising the steps of:

a step C. receiving a target signal; the target signal being a retransmission signal of an associated TB of a second wireless signal in a given set of wireless signals, said given wireless signal being based on said target signal The first wireless signal in the group performs a decoding operation;

The given wireless signal group is one of the K wireless signal groups, and the {first wireless signal, the second wireless signal} of the given wireless signal group is erroneously decoded by the UE.
The method in a UE supporting multi-user overlay according to claim 5, wherein the step C comprises the following steps:

Step C1. Receive first signaling, the first signaling indicating scheduling information of the target signal;

The scheduling information includes a {HARQ process number, transport block information}.
A method in a base station supporting multi-user superposition, comprising the following steps:

- step A. transmitting L wireless signal groups; K wireless signal groups of the L wireless signal groups are respectively transmitted on K carriers, wherein each wireless signal group includes a first wireless signal and a second wireless signal, The K is a positive integer, and the L is a positive integer not less than K

Step B. detecting a wireless signal on the first wireless resource to assist in determining whether the second wireless signal is correctly decoded;

The time-frequency resource occupied by the first wireless signal in the same wireless signal group and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap; the first wireless signal in the K wireless signal groups The target recipient is the first UE, and the target receiver of the second wireless signal in the K wireless signal groups is a terminal other than the first UE.
The method in a base station supporting multi-user superposition according to claim 7, wherein the step B comprises the following steps:

Step B1: detecting a third wireless signal on the first wireless resource, determining that at least one target wireless signal group exists in the L wireless signal groups, and the first wireless signal, the second wireless signal of the target wireless signal group The signal} is erroneously decoded by the target receiver; or the third wireless signal is not detected on the first wireless resource, and the first wireless signal of each of the L wireless signal groups is determined. At least one of the wireless signals is correctly decoded by the target receiver.
The method in a base station supporting multi-user superposition according to claim 7 or 8, wherein the step B further comprises the following steps:

Step B2. Receiving a fourth wireless signal on the second wireless resource, the fourth wireless signal indicating whether each of the K wireless signal groups is correctly decoded.
A method in a base station supporting multi-user superposition according to claim 7, wherein The step B further includes the following steps:

Step B3. Receiving a fifth wireless signal on the first wireless resource, the fifth wireless signal indicating one of the following for each of the K wireless signal groups:

- The first UE correctly decodes the first wireless signal

- the first UE erroneously decodes the first wireless signal and correctly decodes the second wireless signal

The first UE erroneously decodes the first wireless signal and the second wireless signal.
The method in a base station supporting multi-user superposition according to any one of claims 7 to 10, further comprising the steps of:

a step C. transmitting a target signal; the target signal being a retransmission signal of an associated TB of a second wireless signal in a given set of wireless signals;

Wherein the given wireless signal group is one of the K wireless signal groups, and the first wireless signal of the given wireless signal group is erroneously decoded by the first UE.
The method in a base station supporting multi-user superposition according to claim 11, wherein the step C comprises the following steps:

- Step C1. Sending first signaling, the first signaling indicating scheduling information of the target signal;

The scheduling information includes a {HARQ process number, transport block information}.
A user equipment supporting multi-user overlay, wherein the following modules are included:

a first module: configured to respectively receive K wireless signal groups on K carriers, wherein each wireless signal group includes a first wireless signal and a second wireless signal, the K being a positive integer

a second module: configured to determine an operation on the first radio resource according to whether at least the second wireless signal is correctly decoded;

The time-frequency resource occupied by the first wireless signal in the same wireless signal group and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap; the target receiver of the first wireless signal is the UE, and the second The target recipient of the wireless signal is a terminal other than the UE.
The user equipment supporting multi-user overlay according to claim 13, wherein:

The second module is further configured to send a third wireless signal on the first wireless resource, where at least one target wireless signal group exists in the K wireless signal groups, and the first wireless signal group of the target wireless signal group is second. The wireless signal} is erroneously decoded by the UE; or zero transmission power is maintained on the first radio resource, wherein the first wireless signal, the second wireless signal of each of the K wireless signal groups At least one wireless signal in the } is used by the UE Correct decoding.
A base station device supporting multi-user overlay, wherein the following modules are included:

a first module: configured to send L wireless signal groups; wherein the K wireless signal groups are respectively transmitted on K carriers, wherein each wireless signal group includes a first wireless signal and a second wireless Signal, the K is a positive integer, and the L is a positive integer not less than K

a second module: configured to detect a wireless signal on the first wireless resource to assist in determining whether the second wireless signal is correctly decoded;

The time-frequency resource occupied by the first wireless signal in the same wireless signal group and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap; the first wireless signal in the K wireless signal groups The target recipient is the first UE, and the target receiver of the second wireless signal in the K wireless signal groups is a terminal other than the first UE.
The base station device supporting multi-user superposition according to claim 15, wherein:

The second module is further configured to detect a third wireless signal on the first wireless resource, determine that at least one target wireless signal group exists in the L wireless signal groups, and the first wireless signal group of the target wireless signal group The second wireless signal is erroneously decoded by the target receiver; or the third wireless signal is not detected on the first wireless resource, and the {first wireless signal of each of the L wireless signal groups is determined, At least one of the second wireless signals is correctly decoded by the target recipient.