WO2016161881A1

WO2016161881A1 - Ue, and method and equipment in base station for supporting multi-user superposition

Info

Publication number: WO2016161881A1
Application number: PCT/CN2016/076612
Authority: WO
Inventors: 张晓博
Original assignee: 上海朗帛通信技术有限公司
Priority date: 2015-04-06
Filing date: 2016-03-17
Publication date: 2016-10-13
Also published as: CN106160930A

Abstract

Disclosed are a user equipment (UE), and a method and equipment in base station for supporting multi-user superposition. The method comprises: in step 1, receiving, by a UE, a first signaling, the first signaling comprising a first flag bit; and in step 2, receiving a first radio signal, wherein the first signaling is a physical layer signaling, the first flag bit indicates whether to enable the UE to detect a second signaling, and the first radio signal is scheduled by the first signaling. The present invention ensures the UE to switch between a multi-user superposition state and a non-multi-user superposition state, and supports dynamically scheduled multi-user superposition. Furthermore, the present invention reduces a number of times of executing BD by the UE, reduces UE complexity, and prevents an increased number of mistaken detection due to an excessive number of times of executing BD.

Description

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

Technical field

The present invention relates to a scheduling scheme in a wireless communication system, and more particularly to a method and apparatus for control signaling for multi-user superposition based on Long Term Evolution (LTE-Long Term Evolution).

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. And then removing the influence of the second signal from the received signal to obtain a residual signal, and decoding the remaining signal to obtain a first signal, which is an SIC (Successive Interference Cancellation) algorithm. In order to perform SIC, the near user needs to obtain scheduling information of the first signal and the second signal - and the far user only needs to obtain the scheduling information of 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.

In traditional LTE dynamic scheduling, users are based on PDCCH (Physical Downlink). The control information of the PDSCH (Physical Downlink Shared Channel) is obtained by the DCI (Downlink Control Information) transmitted in the EPDCCH (Enhanced PDCCH). For a DCI Payload Size, the UE performs BD (Blind Decoding) to determine the corresponding PDCCH or EPDCCH. Therefore, the number of BDs that the UE performs at most is increased with the number of DCI load sizes that the UE needs to monitor. To reduce the complexity of the UE caused by the excessive number of BDs, the base station configures the TM (Transmission Mode) for the UE through the high layer signaling. Transmission mode), for each TM, the UE only needs to detect two DCI load sizes.

For multi-user overlays, an intuitive idea is that the base station adds extra bits to the scheduled DCI of the first signal (for the near user) that is used to carry information related to the second signal.

Summary of the invention

The inventors found through research that in order to obtain scheduling gain, the UE should be able to dynamically switch between multi-user superposition state and non-multi-user superposition state, and multi-user superimposed UE pairing can be dynamically scheduled. Therefore, the above intuitive method may face the following problems:

- For a given TM, the load size of the scheduled DCI of the first signal may be up to 4 types - 2 types of multi-user superimposed state and non-multi-user superimposed state, so the maximum number of BDs supported by the UE is doubled, increasing The complexity of the UE.

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. Receive first signaling, the first signaling comprising a first flag.

Step B. Receive the first wireless signal.

The first signaling is physical layer signaling, and the first flag indicates whether the UE detects the second signaling, where the first wireless signal is scheduled by the first signaling.

As an embodiment, other information bits and locations of the first signaling bit are removed from the first signaling. Whether the UE detects the second signaling is irrelevant (ie, does not change with the state of the first flag bit).

The second signaling is used to indicate information of the wireless signal superimposed with the first wireless signal. The above method ensures that the load size of the first signaling does not vary with "whether the first wireless signal is superimposed with other wireless signals", so the UE does not need to perform additional BDs for the first signaling.

The first flag ensures that the UE should be able to dynamically switch between the multi-user overlay state and the non-multi-user overlay state, supporting dynamic scheduling of multi-user overlays.

Specifically, in accordance with an aspect of the present invention, the step A further includes the following step A1:

Step A1. Receive second signaling, the second signaling indicating scheduling information of the second wireless signal.

The first flag in the first signaling indicates that the UE detects the second signaling, and the second signaling is physical layer signaling, and the time-frequency resource and the second wireless signal occupied by the first wireless signal. The occupied time-frequency resources overlap in whole or in part.

There are various implementation methods for how to process the second wireless signal according to the second signaling. The following two embodiments describe two possible methods.

As an embodiment of the above aspect, the step B further includes the following step B1:

Step B1. Receive (and correctly decode) the second wireless signal, and cancel the interference caused by the second wireless signal from the time-frequency resource occupied by the first wireless signal.

The above embodiment can completely eliminate the interference of the second wireless signal (regardless of the channel estimation error), but requires the UE to perform channel decoding on the second wireless signal and reconstruct the second wireless signal, which is high in complexity.

As an embodiment of the foregoing aspect, the step B further includes the following step B2:

Step B2. Receiving the second wireless signal (not decoding, performing a hard decision on the constellation point symbol of the second wireless signal), and canceling the interference caused by the second wireless signal from the time-frequency resource occupied by the first wireless signal.

The above embodiment is less complex, but may cause the interference of the second wireless signal to not be completely eliminated.

As an embodiment, the load size of the second signaling is equal to the load size of the DCI format 1A monitored by the UE for scheduling the target carrier, and the target carrier is the transmission carrier of the first wireless signal.

DCI format 1A is a DCI format supported by all transmission modes, so the above embodiment ensures that the UE does not need to perform additional BDs for the second signaling.

As an embodiment, the second signaling is in CSS (Common Search Space, public search) Transmission in cable space).

As an embodiment, the second signaling is transmitted in a USS (UE Specific Search Space).

Specifically, according to the above aspect of the present invention, the step A further includes the following steps:

- Step A0. Receiving the first higher layer signaling, the first higher layer signaling indicating at least one of the following:

-. Association identifier of the second signaling

The location of the scheduling information of the second wireless signal in the second signaling.

As an embodiment, the second signaling is transmitted in the CSS, the second signaling includes K group scheduling information, and the first high layer signaling indicates an index of the scheduling information of the second wireless signal in the K group scheduling information.

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 association identifier is an RNTI (Radio Network Temporary Identity).

As an embodiment, the association identifier is used to determine a {CRC (Cyclic Redundancy Check) scrambling code corresponding to the physical layer signaling, and a PDCCH (Physical Downlink Control Channel) UE-specific search. One or more of space, EPDCCH (Enhanced PDCCH, Enhanced Physical Downlink Shared Channel) UE-specific search space}.

Specifically, according to the above aspect of the invention, the scheduling information includes at least one of the following:

-.Transport block related information

-.HARQ (Hybrid Automatic Repeat reQuest) Process Number

-.CRS (Cell Reference Signal)/URS (UE-specific Reference Signal) flag bit, or signaling format of scheduling signaling of the second radio signal

-.URS related information, or TPMI (Transmitted Precoding Matrix Indicator)

-. Power related information.

The transport block related information includes X sets of transport block information, and one set of transport block information corresponds to one transport block, and the transport block information includes {MCS (Modulation and Coding Scheme, Modulation coding mode), at least MCS in NDI (New Data Indicator), RV (Redundancy Version).

The CRS/URS flag is used to indicate whether the second wireless signal is transmitted by the CRS antenna port or by the URS antenna port.

As an embodiment, the signaling format is a DCI (Downlink Control Information) format.

As an embodiment, the URS related information includes an Antenna port (s), a scrambling identity, a number of layers, and the URS related information is represented by three information bits. Instructions.

As an embodiment, the antenna port of the URS includes one or more of antenna ports {7, 8, 9, 10, 11, 12, 13, 14}.

As an embodiment, a demodulation RS (Reference Signal) of the second radio signal is a CRS, and the power related information is an OFDM (Orthogonal Frequency Division Multiplexing) in which the second radio signal does not include a CRS. The ratio of the EPRE (Energy Per Resource Element) on the symbol to the EPRE of the CRS.

As an embodiment, the demodulation RS of the second wireless signal is an associated URS with the first wireless signal, and the power related information is an OFDM (Orthogonal Frequency Division Multiplexing) of the second wireless signal that does not include the CRS. The EPRE (Energy Per Resource Element) on the symbol is compared to the EPRE of the associated URS.

Specifically, according to an aspect of the present invention, the step B further includes the following step B2:

- Step B2. It is assumed that there is no superimposed wireless signal on the time-frequency resource occupied by the first wireless signal.

The first flag bit in the first signaling indicates that the UE does not detect the second signaling.

The specific implementation of the step B2 is determined by the terminal manufacturer. As an embodiment, the UE receives the first wireless signal by using an MMSE (Minimum Mean-Squared Error) algorithm. As an embodiment, after the UE correctly decodes the first wireless signal, the influence of the first wireless signal is subtracted from the received signal, and the remaining signal is used to determine the background noise.

The invention discloses a method in a base station supporting multi-user superposition, wherein Next steps:

- Step A. Transmitting the first signaling, the first signaling includes a first flag bit.

- Step B. Send the first wireless signal.

The first signaling is physical layer signaling, and the first flag indicates whether the target UE of the first signaling detects the second signaling, where the first wireless signal is scheduled by the first signaling.

Specifically, in accordance with an aspect of the present invention, the step A further includes the following step A1, the step B further comprising the following step B1.

- Step A1. Sending second signaling, the second signaling indicating scheduling information of the second wireless signal.

- Step B1. Send a second wireless signal.

Specifically, according to an aspect of the present invention, the transmitting serving cell of the first signaling only transmits the first wireless signal on the time-frequency resource occupied by the first wireless signal. The serving serving cell of the first signaling is maintained by the base station.

The first flag bit in the first signaling indicates that the target UE of the first signaling does not detect the second signaling.

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

- Step A0. Sending the first higher layer signaling, the first higher layer signaling indicating at least one of the following:

-. Association identifier of the second signaling

Specifically, according to an aspect of the invention, the scheduling information includes at least one of the following:

-.Transport block related information

-.HARQ process number

-.CRS/URS flag bit, or signaling format for scheduling signaling of the second wireless signal

-.URS related information, or TPMI

-. Power related information.

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

The first module is configured to receive the first signaling, where the first signaling includes a first flag bit.

The second module is configured to receive the first wireless signal.

As an embodiment, the foregoing user equipment is characterized by:

The first module is further configured to receive second signaling, and the second signaling is to indicate scheduling information of the second wireless signal.

The second module is further configured to receive the second wireless signal, and cancel the interference caused by the second wireless signal from the time-frequency resource occupied by the first wireless signal.

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

The first module is configured to send the first signaling, where the first signaling includes a first flag bit.

The second module is configured to send the first wireless signal.

As an embodiment, the foregoing base station device is characterized by:

The first module is further configured to send second signaling, where the second signaling indicates scheduling information of the second wireless signal.

The second module is also for transmitting a second wireless signal.

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

- Ensure that the UE should be able to dynamically switch between multi-user overlay state and non-multi-user overlay state, supporting dynamic scheduling of multi-user overlays

- The number of times the UE performs BD is reduced, the complexity of the UE is reduced, and the false alarm increase caused by excessive BD times is avoided.

DRAWINGS

A detailed description of non-limiting embodiments made with reference to the following drawings, Other features, objects, and advantages of the invention will become more apparent.

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

2 illustrates a flow chart for determining whether to receive second signaling according to a first flag bit, in accordance with an embodiment of the present invention;

3 shows a schematic diagram of second signaling including K-group scheduling information, in accordance with one embodiment of the present invention;

4 shows a schematic diagram of second signaling including a set of scheduling information, 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 the features of the embodiments and the embodiments of the present application may be combined with each other without conflict.

Example 1

Embodiment 1 illustrates a scheduling flowchart of downlink multi-user overlay, as shown in FIG. In Figure 1, base station N1 is a maintenance base station for the serving cells of UE U2 and UE U3, wherein the steps in block F1 are optional steps.

For the base station N1 , the first signaling is sent in step S11, and the first signaling includes the first flag bit. The second signaling is sent in step S12, and the second signaling indicates scheduling information of the second wireless signal. The first wireless signal and the second wireless signal are transmitted in step S13.

For UE U2 , the first signaling is received in step S21. The second signaling is received in step S22. The second wireless signal is received in step S23, the interference caused by the second wireless signal is cancelled from the time-frequency resource occupied by the first wireless signal, and then the first wireless signal is received.

For UE U3 , a second wireless signal is received in step S31.

In the first embodiment, the first signaling is physical layer signaling, and the first flag bit includes 1 bit, which is used to indicate whether the UE U2 detects the second signaling, and the first wireless signal is scheduled by the first signaling. The first flag bit in the first signaling indicates that the UE detects the second signaling, and the second signaling is The physical layer signaling, the time-frequency resource occupied by the first wireless signal and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap.

As a sub-embodiment 1 of the first embodiment, the first wireless signal and the second wireless signal are respectively transmitted on the PDSCH.

As a sub-embodiment 2 of Embodiment 1, the first radio signal and the second radio signal occupy the same frequency domain resource, and the scheduling information does not include information bits for frequency domain resource allocation (ie, UE U2 according to the first signaling) The information bits used for frequency domain resource allocation determine the frequency domain resources occupied by the first wireless signal.

As a sub-embodiment 3 of Embodiment 1, the base station N1 transmits the first higher layer signaling in step S10, and the UE U2 receives the first higher layer signaling in step S20. The first higher layer signaling indicates at least one of the following:

-. Association identifier of the second signaling

The first high layer signaling is RRC (Radio Resource Control) signaling or MAC (Medium Access Control) signaling.

Example 2

Embodiment 2 exemplifies a flowchart for judging whether or not to receive the second signaling according to the first flag bit, as shown in FIG. Embodiment 2 is an operation flow on the UE side.

The UE receives the first signaling in step S111, where the first signaling includes a first flag bit. It is determined in step S112 whether the first flag bit indicates that the UE detects the second signaling. If so, the second signaling is received in step S113, the interference of the second wireless signal is cancelled from the received signal in step S114, and then step S115 is performed. If not, the first wireless signal is received in step S115.

In Embodiment 2, the first signaling is physical layer signaling, and the first wireless signal is scheduled by the first signaling. The second signaling is physical layer signaling, and the time-frequency resources occupied by the first wireless signal and the time-frequency resources occupied by the second wireless signal are all or partially overlapped. The second signaling indicates scheduling information of the second wireless signal.

As a sub-embodiment 1 of Embodiment 2, if the first flag does not indicate that the UE detects the second signaling, the UE assumes that there is no superimposed wireless signal on the time-frequency resource occupied by the first wireless signal.

Example 3

Embodiment 3 exemplifies a second signaling including K group scheduling information, as shown in FIG.

In the third embodiment, the second signaling in the present invention includes the K group of the scheduling information in the present invention, and the scheduling information of the second wireless signal in the present invention is the first one in FIG. A group of K group scheduling information. The first high layer signaling in the present invention indicates an index of scheduling information of the second wireless signal in the first to Kth group scheduling information.

As a sub-embodiment 1 of Embodiment 3, the second signaling is transmitted in the CSS.

As sub-embodiment 2 of Embodiment 3, the scheduling information includes an MCS.

As a sub-embodiment 3 of Embodiment 3, the scheduling information includes a CRS/URS flag bit, or a signaling format of scheduling signaling of the second wireless signal.

Example 4

Embodiment 4 illustrates a schematic diagram of second signaling including a set of scheduling information, as shown in FIG.

In Embodiment 4, the second signaling in the present invention includes a set of the scheduling information in the present invention, and (optionally) padding bits. If the number of information bits occupied by a set of scheduling information is equal to the payload size of a given DCI (ie, the number of bits not including the CRC), the padding bits are not included in the second signaling. If the number of information bits occupied by a set of scheduling information is less than the load size of a given DCI, the padding bits are included in the second signaling. The load size of the second signaling is equal to the load size of the given DCI.

As a sub-embodiment 1 of Embodiment 4, the given DCI is a DCI format 1A for monitoring a transmission carrier of a first wireless signal in the present invention monitored by a target UE of the first signaling in the present invention, Or DCI 1C.

As a sub-embodiment 2 of embodiment 4, the given DCI is the first signaling.

As a sub-embodiment 3 of Embodiment 4, the scheduling information includes:

-.Transport block related information

-.CRS/URS flag.

As a sub-embodiment 4 of Embodiment 4, the second wireless signal is transmitted by the CRS antenna port and adopts a transmission mode of transmission diversity, or the second wireless signal is transmitted by the URS antenna port and adopts one of the antenna ports {7, 8} or Two.

Example 5

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

The first receiving module 201 is configured to receive the first signaling, where the first signaling includes a first flag bit. The second receiving module 202 is configured to receive the first wireless signal.

Embodiment 5: The first signaling is a scheduling DCI of the first wireless signal, and the first flag bit indicates whether the UE detects the second signaling. The second signaling is DCI.

When the first flag in the first signaling indicates that the UE detects the second signaling, the first receiving module 201 is further configured to receive the second signaling, where the second signaling indicates the scheduling information of the second wireless signal. . The second receiving module 202 is further configured to receive the second wireless signal, and cancel the interference caused by the second wireless signal from the time-frequency resource occupied by the first wireless signal. The time-frequency resource occupied by the first wireless signal and the time-frequency resource occupied by the second wireless signal all overlap or partially overlap.

As a sub-embodiment 1 of Embodiment 5, the scheduling information includes:

-.Transport block related information

-.HARQ process number

-. Power related 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 first transmitting module 301 and a second transmitting module 302.

The first sending module 301 is configured to send the first signaling, where the first signaling includes a first flag bit. The second sending module 302 is configured to send the first wireless signal.

In Embodiment 6, the first signaling is physical layer signaling, and the first flag indicates whether the target UE of the first signaling detects the second signaling, and the first wireless signal is scheduled by the first signaling.

When the first flag in the first signaling indicates that the UE detects the second signaling, the first sending module 301 is further configured to send the second signaling, where the second signaling indicates the scheduling information of the second wireless signal. . The second sending module 302 is further configured to send the second wireless signal. The second signaling is physical layer signaling, and the time-frequency resources occupied by the first wireless signal and the time-frequency resources occupied by the second wireless signal are all or partially overlapped.

As a sub-embodiment 1 of Embodiment 6, the first sending module 301 is further configured to send MAC signaling. The associated RNTI indicating the second signaling, the RRC signaling is sent to indicate the location of the scheduling information of the second wireless signal in the second signaling.

As sub-embodiment 2 of Embodiment 6, the first signaling is one of DCI formats {1, 1A, 1B, 2, 2A, 2B, 2C} (with the first flag added).

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 in the present invention includes, but is not limited to, a wireless communication device such as a mobile phone, a tablet computer, a notebook, and an internet card. 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. Receive first signaling, where the first signaling includes a first flag bit;

- step B. receiving the first wireless signal;

The first signaling is physical layer signaling, and the first flag indicates whether the UE detects the second signaling, where the first wireless signal is scheduled by the first signaling.
The method of the UE supporting the multi-user overlay according to claim 1, wherein the step A further comprises the following step A1:

- Step A1. Receiving second signaling, the second signaling indicating scheduling information of the second wireless signal;

The first flag in the first signaling indicates that the UE detects the second signaling, and the second signaling is physical layer signaling, and the time-frequency resource occupied by the first wireless signal and the second wireless signal are occupied by the second wireless signal. Time-frequency resources overlap in whole or in part.
The method in the UE supporting multi-user overlay according to claim 1, wherein the step B further comprises the following step B2:

- step B2. It is assumed that there is no superimposed wireless signal on the time-frequency resource occupied by the first wireless signal;

The first flag bit in the first signaling indicates that the UE does not detect the second signaling.
The method in the UE supporting multi-user overlay according to claim 2, wherein the step A further comprises the following steps:

- Step A0. Receiving the first higher layer signaling, the first higher layer signaling indicating at least one of the following:

-. Association identifier of the second signaling

The location of the scheduling information of the second wireless signal in the second signaling.
The method in a UE supporting multi-user overlay according to claim 2 or 4, wherein the scheduling information comprises at least one of the following:

-.Transport block related information

-.HARQ process number

-.CRS/URS flag bit, or signaling format for scheduling signaling of the second wireless signal

-.URS related information, or TPMI

-. Power related information.
A method in a base station supporting multi-user superposition, comprising the following steps:

- Step A. Sending first signaling, where the first signaling includes a first flag bit;

- step B. transmitting a first wireless signal;

The first signaling is physical layer signaling, and the first flag indicates whether the target UE of the first signaling detects the second signaling, where the first wireless signal is scheduled by the first signaling.
The method of the base station supporting multi-user superposition according to claim 6, wherein the step A further comprises the following step A1, the step B further comprising the following step B1;

- Step A1. Sending second signaling, the second signaling indicating scheduling information of the second wireless signal;

- step B1. transmitting a second wireless signal;

The first flag in the first signaling indicates that the UE detects the second signaling, and the second signaling is physical layer signaling, and the time-frequency resource and the second wireless signal occupied by the first wireless signal. The occupied time-frequency resources overlap in whole or in part.
The method for supporting a multi-user superimposed base station according to claim 6, wherein the transmitting serving cell of the first signaling transmits only the first radio signal on the time-frequency resource occupied by the first radio signal; The transmitting serving cell of the first signaling is maintained by the base station;

The first flag bit in the first signaling indicates that the target UE of the first signaling does not detect the second signaling.
The method in a base station supporting multi-user superposition according to claim 7, wherein the step A further comprises the following steps:

- Step A0. Sending the first higher layer signaling, the first higher layer signaling indicating at least one of the following:

-. Association identifier of the second signaling

The location of the scheduling information of the second wireless signal in the second signaling.
The method in a base station supporting multi-user superposition according to claim 7 or 9, wherein the scheduling information comprises at least one of the following:

-.Transport block related information

-.HARQ process number

-.CRS/URS flag bit, or signaling format for scheduling signaling of the second wireless signal

-.URS related information, or TPMI

-. Power related information.
A user equipment supporting multi-user overlay, wherein the following modules are included:

a first module, configured to receive first signaling, where the first signaling includes a first flag bit;

a second module: configured to receive the first wireless signal;

The first signaling is physical layer signaling, and the first flag indicates whether the UE detects the second signaling, where the first wireless signal is scheduled by the first signaling.
The user equipment supporting multi-user overlay according to claim 11, wherein:

The first module is further configured to receive second signaling, where the second signaling indicates scheduling information of the second wireless signal;

The first flag in the first signaling indicates that the UE detects the second signaling, and the second signaling is physical layer signaling, and the time-frequency resource and the second wireless signal occupied by the first wireless signal. The occupied time-frequency resources overlap in whole or in part.
A base station device supporting multi-user overlay, wherein the following modules are included:

The first module is configured to send the first signaling, where the first signaling includes a first flag bit;

a second module: configured to send the first wireless signal;

The first signaling is physical layer signaling, and the first flag indicates whether the target UE of the first signaling detects the second signaling, where the first wireless signal is scheduled by the first signaling.
The base station device supporting multi-user superposition according to claim 13, wherein:

The first module is further configured to send second signaling, where the second signaling indicates scheduling information of the second wireless signal;

The second module is further configured to send the second wireless signal;

The first flag in the first signaling indicates that the UE detects the second signaling, and the second signaling is physical layer signaling, and the time-frequency resource occupied by the first wireless signal and the second wireless signal are occupied by the second wireless signal. Time-frequency resources overlap in whole or in part.