CN106034360B

CN106034360B - Multi-user superposition transmission method and device

Info

Publication number: CN106034360B
Application number: CN201510117203.3A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2015-03-17
Filing date: 2015-03-17
Publication date: 2020-04-10
Anticipated expiration: 2035-03-17
Also published as: WO2016146073A1; CN106034360A

Abstract

The invention discloses a multi-user superposition transmission method and a multi-user superposition transmission device. As an embodiment, the UE receives the first signaling in step one, and respectively receives K1 dynamic signaling according to the K1 sets of assistance information. The K1 sets of side information are indicated by a first signaling, and the K1 sets of side information and the K1 dynamic signaling correspond one-to-one. In the second step, K1 wireless signals are received according to the scheduling information in the K1 dynamic signaling, and the first wireless signal is received according to the scheduling information of the first signaling. The time frequency resource occupied by each wireless signal in the K1 wireless signals is completely or partially overlapped with the time frequency resource occupied by the first wireless signal, so that the invention avoids the repeated sending of the same group of scheduling information and saves the air interface resource. In addition, the present invention reduces the number of times the UE executes the BD.

Description

Multi-user superposition transmission method and device

Technical Field

The present invention relates to a scheme of scheduling signaling in a wireless communication system, and in particular, to a method and an apparatus for downlink scheduling signaling for multi-user Superposition (Superposition) based on Long Term Evolution (LTE-Long Term Evolution).

Background

In a conventional 3GPP (3rd Generation Partner Project) cellular system, downlink radio signals of multiple users are implemented by one or more of { TDM (Time Division Multiplexing), FDM (Frequency Division Multiplexing), CDM (Code Division Multiplexing) }. A new research topic (RP-150496) is introduced in 3GPP R (Release) 13, that is, downlink multi-user superposition, which essentially distinguishes downlink wireless signals of two users by using different transmission powers. The two users typically include a near user (i.e., near the base station) and a far user (i.e., far from the base station), and the base station allocates a lower transmit power for the first signal for the near user while allocating a higher transmit power for the second signal for the far user. The far user directly demodulates the second signal (i.e. the first signal is treated as noise), while the near user firstly demodulates the second signal (considering that the far user of the near user has lower path loss and the decoding success probability is high), then removes the influence of the second signal from the received signal to obtain a residual signal, and decodes the residual signal to obtain the first signal, which is the SIC (Successive Interference Cancellation) algorithm.

To perform SIC, a near user needs to obtain scheduling information for a first signal and a second signal-while a far user only needs to obtain scheduling information for the second signal. In conventional LTE dynamic scheduling, a user obtains scheduling Information of a PDSCH (Physical Downlink shared Channel) according to DCI (Downlink Control Information) transmitted in a PDCCH (Physical Downlink Control Channel) or an EPDCCH (Enhanced PDCCH). Therefore, one intuitive idea is that the base station transmits the scheduling information of the first signal and the second signal in DCI for the near user, and transmits the scheduling information of the second signal in DCI for the far user.

Disclosure of Invention

The inventors have found through research that the above-described intuitive method may face the following problems:

scheduling information of the second signal is transmitted twice, reducing transmission efficiency

The possible Payload Size (i.e. the number of information bits) of DCI for near users may be larger. The payload size of the DCI is determined by the DCI format, i.e., the payload size of the DCI for the near user is not only affected by the scheduling format of the first signal but also affected by the DCI format for the far user. Too many possible payload sizes may result in an increase in the number of BD (blind decoding) times, thereby increasing the complexity of the UE.

The inventor finds out through further research that more than one far user may be scheduled on the time-frequency resource where the near user is scheduled (non-overlapping among the far users), and in order to perform SIC, scheduling information for multiple far users may be included in DCI for the near user. This further exacerbates the problem.

The present invention provides a solution to the above problems. It should be noted that, without conflict, the embodiments and features in the embodiments in the UE of the present application may be applied to the base station, and vice versa. Further, the embodiments and features of the embodiments of the present application may be arbitrarily combined with each other without conflict.

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

-step a. receiving a first signaling, receiving K1 dynamic signaling according to K1 sets of side information, respectively. The K1 sets of auxiliary information are indicated by a first signaling, the K1 sets of auxiliary information correspond to the K1 dynamic signaling one-to-one, and the auxiliary information includes one or more of { signaling identifier, PDCCH/EPDCCH identifier bit, time-frequency position, and signaling format }

And B, respectively receiving K1 wireless signals according to the scheduling information in the K1 dynamic signaling, and receiving a first wireless signal according to the scheduling information of the first signaling.

Wherein, the time frequency resource occupied by each wireless signal in the K1 wireless signals and the time frequency resource occupied by the first wireless signal are completely or partially overlapped, and the K1 is a positive integer. The first signaling and the K1 dynamic signaling are both physical layer signaling. If the K1 is greater than 1, the K1 wireless signals are pairwise orthogonal on the time-frequency resource.

The essence of the above aspect is that the UE first receives multiple physical layer signaling before it can receive the radio signal. The above-mentioned nature goes against the common general knowledge in the existing cellular network because the failure to receive correctly 1 of the multiple physical layer signaling results in the UE being unable to receive the downlink radio signal. The inventors have found through research that the above-mentioned common general knowledge no longer holds in the multi-user superposition scenario, because the probability of a near user correctly receiving a given DCI for a far user is greater than the probability of a far user correctly receiving the given DCI.

As an embodiment, the signaling identifies one or more of { CRC scrambling code, PDCCH UE specific search space, EPDCCH UE specific search space } used to determine corresponding dynamic signaling.

As an embodiment, the signaling Identity is an RNTI (Radio Network Temporary Identity).

As an embodiment, a SIC algorithm is employed to obtain the first wireless signals for the K1 wireless signals. As an embodiment, the method is characterized by further comprising the steps of: -step c. passing the first radio signal to a higher layer, discarding said K1 radio signals.

Since the K1 dynamic signaling are not intended for the UE, the UE needs to obtain additional information (i.e., the K1 set of assistance information) before receiving the K1 dynamic signaling. Further, the additional information required by the UE may be different for PDCCH and EPDCCH. Thus:

as an embodiment, if the PDCCH/EPDCCH identification bit is in the first state (0 or 1), the corresponding dynamic signaling is transmitted on the PDCCH, and the corresponding auxiliary information is for the PDCCH. And if the PDCCH/EPDCCH identification bit is in a state opposite to the first state, the corresponding dynamic signaling is transmitted on the EPDCCH, and the corresponding auxiliary information is directed to the EPDCCH.

In conventional LTE, the UE determines the PDCCH or EPDCCH occupied by DCI (for each possible payload size) over BD. While excessive BD number may increase the false alarm probability, the time-frequency location and the signaling format in the assistance information can reduce the BD number performed by the UE for the K1 dynamic signaling.

In the conventional LTE, a base station configures a current TM (transmission mode) for a UE through a high-level signaling, whether a DCI includes a CIF (Carrier Indicator Field) and whether a DCI includes SRS (Sounding reference signal) and other high-level information, and the UE can determine a load size of a given DCI format according to the auxiliary information. However, in the present invention, if the UE only knows the load sizes of the K1 dynamic signaling, but does not know the corresponding higher layer signaling, the UE may not be able to determine the DCI format, i.e., a scenario where load sizes of multiple DCI formats conflict. One approach is to configure all required higher layer signaling for the UE through higher layer signaling. However, this approach may introduce a significant redundancy overhead. The inventors found through research that when the first wireless Signal is DMRS (Demodulation Reference Signal) -based transmission, the K1 wireless signals can only be DMRS-based transmission, otherwise the target UE of the K1 wireless signals cannot perform rate matching for DMRS, or the target UE of the K1 wireless signals is not compatible with legacy UEs. While the DCI format based on DMRS does not have the scenario of load size collision. Thus:

in particular, according to one aspect of the invention, characterized in that the first radio signal is transmitted by a DMRS antenna port, said UE assuming that said K1 radio signals are all transmitted by DMRS antenna ports.

As an embodiment, the assistance information does not include the signaling format, the UE blindly decodes the signaling format determined. The above aspect can effectively reduce the payload size of the first signaling.

When the first wireless Signal is CRS (Cell Reference Signal) -based transmission, each of the K1 wireless signals may be CRS-based transmission or DMRS-based transmission. At this time, a scenario in which the load sizes conflict may occur. Thus:

specifically, according to an aspect of the present invention, the first wireless signal is transmitted by a CRS antenna port, and the auxiliary information includes the signaling format.

As an example, the UE assumes that each of the K1 wireless signals is transmitted by a DMRS antenna port or by the same CRS antenna port as the first wireless signal.

As an embodiment, the UE performs determining possible payload sizes of the corresponding dynamic signaling according to the format, and then performs a decoding operation, where the possible payload sizes are one or more.

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

step a1. receiving the first higher layer signaling determines K3 EPDCCH-PRB-sets.

Wherein, for target dynamic signaling, the time-frequency position in the corresponding auxiliary information comprises at least one of:

index of target EPDCCH-PRB-set among the K3 EPDCCH-PRB-sets

The index of the EPDCCH candidate occupied by the target dynamic signaling in the target EPDCCH-PRB-set.

The target dynamic signaling is each dynamic signaling transmitted on the EPDCCH in the K1 dynamic signaling, the EPDCCH-PRB-set to which the EPDCCH candidate occupied by the target dynamic signaling belongs is, and the K3 is a positive integer.

The second index can additionally reduce the BD number, however, may increase the payload size of the first signaling.

As an embodiment, the first higher layer signaling is RRC signaling. As an example, the K3 EPDCCH-PRB-sets are subframe specific (i.e. first higher layer signaling is only valid for the current subframe) or subframe set specific (i.e. first higher layer signaling is only valid for a specific subframe set). As an embodiment, the time-frequency position in the corresponding auxiliary information of the target dynamic signaling further indicates whether the EPDCCH candidate occupied by the target dynamic signaling is Distributed (Distributed) or Localized (Localized).

As one example, the K3 is greater than 2.

As an embodiment, the K3 EPDCCH-PRB-sets share the same Resource mapping parameter for EPDCCH, which indicates REs that should perform rate matching (to avoid occupation) when EPDCCH RE (Resource Element) mapping. As a sub-embodiment, the K3 EPDCCH-PRB-sets include { pdsch-Start-r11, crs-Portscount-r11, crs-Portscount-r11, csi-RS-ConfigZPID-r11 }.

Specifically, according to one aspect of the present invention, for a given dynamic signaling, the time-frequency location in the corresponding assistance information includes an index of a PDCCH occupied by the given dynamic signaling in a target PDCCH candidate set, where the target PDCCH candidate set is composed of all PDCCH candidates monitored by the UE on a transmission subframe and a transmission carrier of the given dynamic signaling. Wherein the given dynamic signaling is each of the K1 dynamic signaling transmitted on the PDCCH.

-a step a2. receiving a second higher layer signaling to determine a first integer for generating an initial value of a DMRS sequence shared by the first signaling and all signaling transmitted on the EPDCCH in the K1 set of signaling.

For one embodiment, the first integer is a non-negative integer less than 504. As an embodiment, the mapping relationship between the initial value of the DMRS sequence and the first integer reuses the mapping relationship between the initial value of the DMRS pseudo-random sequence generator in the EPDCCH and the integer configured by the higher layer signaling DMRS-scrimblingsequence, that is:

the above aspect forces the K1 dynamic signaling and the first signaling to use the same EPDCCH DMRS sequence, which has the advantage of reducing the payload size of the first signaling.

-a step a3. receiving third higher layer signaling to determine a second integer set comprising a plurality of integer elements different from each other.

All or part of the K1 groups of auxiliary information further comprises DMRS associated integers, the DMRS associated integers are used for generating initial values of DMRS sequences of corresponding dynamic signaling, and indexes of the DMRS associated integers in the second integer set are indicated by the first signaling.

As one embodiment, the integer element is a non-negative integer less than 504.

As an embodiment, the mapping relationship between the initial value of the DMRS sequence and the corresponding DMRS associated integer reuses the mapping relationship between the initial value of the DMRS pseudo-random sequence generator in the EPDCCH and the integer configured by the higher layer signaling DMRS-scrimblingsequence.

The above aspect makes it possible for the K1 dynamic signaling and the first signaling to employ a variable EPDCCH DMRS sequence at the cost of increasing the payload size of the first signaling.

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

step a. send the first signaling and K1 dynamic signaling. The K1 set of side information is indicated in the first signaling. The K1 auxiliary information is in one-to-one correspondence with the K1 dynamic signaling, and the auxiliary information comprises one or more of { signaling identification, time frequency position and signaling format }

Step b. transmitting K1 radio signals and the first radio signal.

Wherein the first signaling comprises scheduling information of the first wireless signal, and the scheduling information of the K1 dynamic signaling is respectively used for scheduling the K1 wireless signals. The time frequency resource occupied by each wireless signal in the K1 wireless signals is completely or partially overlapped with the time frequency resource occupied by the first wireless signal, and the K1 is a positive integer. The first signaling and the K1 dynamic signaling are both physical layer signaling. The signaling format includes one or more of { whether or not CIF is included, whether or not SRS request is included, DCI format, transmission mode }. If the K1 is greater than 1, the K1 wireless signals are pairwise orthogonal on the time-frequency resource.

As an embodiment, the DCI format and the transmission mode do not occur simultaneously.

As an embodiment, the assistance information does not include the signaling format, the UE blindly decodes the signaling format determined.

As an embodiment, the first wireless signal is transmitted by a DMRS antenna port, and the dynamic signaling is one of DCI formats {2B, 2C }.

As an embodiment, the first wireless signal is transmitted by a CRS antenna port, and the dynamic signaling is one of DCI formats {1, 1A, 1B, 1C, 1D, 2, 2A, 2B, 2C }.

-step a1. sending a first higher layer signaling indication K3 EPDCCH-PRB-sets.

index of target EPDCCH-PRB-set among the K3 EPDCCH-PRB-sets

Specifically, according to one aspect of the present invention, for a given dynamic signaling, the time-frequency location in the corresponding assistance information includes an index of a PDCCH occupied by the given dynamic signaling in a target PDCCH candidate set, where the target PDCCH candidate set is composed of all PDCCH candidates monitored by a target UE of a first signaling on a transmission subframe and a transmission carrier of the given dynamic signaling. Wherein the given dynamic signaling is each of the K1 dynamic signaling transmitted on the PDCCH

-a step a2. sending a second higher layer signaling indicating a first integer for generating an initial value of a DMRS sequence shared by the first signaling and all signaling transmitted on the EPDCCH in the K1 set of signaling.

-a step a3. sending a third higher layer signaling indication second integer set, the second integer set comprising a plurality of integer elements different from each other.

The invention discloses user equipment supporting multi-user superposition, which comprises the following modules:

a first module: the system is used for receiving the first signaling, and respectively receiving K1 dynamic signaling according to the K1 groups of auxiliary information. The K1 auxiliary information is indicated by a first signaling, the K1 auxiliary information and the K1 dynamic signaling correspond to each other one by one, and the auxiliary information includes one or more of { signaling identification, time-frequency position, and signaling format }

A second module: the system is used for receiving K1 wireless signals according to the scheduling information in the K1 dynamic signaling respectively, and receiving a first wireless signal according to the scheduling information of a first signaling.

Wherein, the time frequency resource occupied by each wireless signal in the K1 wireless signals and the time frequency resource occupied by the first wireless signal are completely or partially overlapped, and the K1 is a positive integer. The first signaling and the K1 dynamic signaling are both physical layer signaling. The signaling format includes one or more of { whether or not CIF is included, whether or not SRS request is included, DCI format, transmission mode }. If the K1 is greater than 1, the K1 wireless signals are pairwise orthogonal on the time-frequency resource.

The invention discloses a base station device supporting multi-user superposition, which comprises the following modules:

a first module: for sending the first signaling and K1 dynamic signaling. The K1 set of side information is indicated in the first signaling. The K1 auxiliary information is in one-to-one correspondence with the K1 dynamic signaling, and the auxiliary information comprises one or more of { signaling identification, time frequency position and signaling format }

A second module: for transmitting K1 wireless signals and a first wireless signal.

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

avoid multiple transmissions of the same group of scheduling information, save air interface resources

Reduce the number of times the UE executes BDs, reduce the complexity of the UE, and avoid increased false alarms due to excessive BD times.

Drawings

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

FIG. 1 is a flow chart illustrating scheduling of downlink multi-user superposition according to an embodiment of the present invention;

fig. 2 shows a schematic diagram of a first signaling indicating a set of assistance information according to an embodiment of the invention;

fig. 3 is a schematic resource allocation diagram of downlink multi-user superposition according to an embodiment of the present invention;

fig. 4 shows a block diagram of a processing device in a UE according to an embodiment of the invention;

fig. 5 shows a block diagram of a processing means in a base station according to an embodiment of the invention;

Detailed Description

The technical solutions of the present invention will be further described in detail with reference to the accompanying drawings, and it should be noted that the features of the embodiments and examples of the present application may be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a scheduling flowchart of downlink multi-user superposition, as shown in fig. 1. In fig. 1, base station N1 is the maintaining base station of the serving cell of UE U2, where the steps in block F1 are optional.

For theBase station N1The first signaling and K1 dynamic signaling are transmitted in step S11. The K1 set of side information is indicated in the first signaling. The K1 sets of auxiliary information and the K1 dynamic signaling are in one-to-one correspondence. The K1 wireless signals and the first wireless signal are transmitted in step S13. For theUE U2The first signaling is received in step S21, and K1 dynamic signaling are respectively received according to the K1 sets of auxiliary information. In step S23, K1 wireless signals are received according to the scheduling information of the K1 dynamic signaling, and the first wireless signal is received according to the scheduling information of the first signaling.

In embodiment 1, the first signaling includes scheduling information of the first wireless signal, and the scheduling information in the K1 dynamic signaling is used for scheduling the K1 wireless signals, respectively. The time frequency resource occupied by each wireless signal in the K1 wireless signals is completely or partially overlapped with the time frequency resource occupied by the first wireless signal, and the K1 is a positive integer. The first signaling and the K1 dynamic signaling are both physical layer signaling. If the K1 is greater than 1, the K1 wireless signals are pairwise orthogonal on the time-frequency resource.

As sub-embodiment 1 of embodiment 1, the auxiliary information includes { signaling identifier, time-frequency location, signaling format }. The signaling format includes { whether CIF, DCI format or transmission mode is included }.

As sub-embodiment 2 of embodiment 1, the base station N1 sends a first higher layer signaling indication K3 EPDCCH-PRB-sets in step S12. The UE U2 receives the first higher layer signaling in step S22. Wherein, for the target dynamic signaling, the corresponding auxiliary information includes at least one of the following:

index of target EPDCCH-PRB-set among the K3 EPDCCH-PRB-sets

As sub-embodiment 3 of embodiment 1, said K1 is 1 or 2.

As sub-embodiment 4 of embodiment 1, the auxiliary information grouped in the K1 group of auxiliary information includes { signaling identifier, time-frequency position, signaling format }, and the auxiliary information grouped in the K1 group of auxiliary information includes { signaling identifier, signaling format }.

As sub-embodiment 5 of embodiment 1, if the first wireless signal is transmitted by a DMRS antenna port, the UE assumes that the K1 wireless signals are all transmitted by DMRS antenna ports, and the assistance information does not include the signaling format. The assistance information comprises the signaling format if the first wireless signal is transmitted by a CRS antenna port.

Example 2

Embodiment 2 illustrates a schematic diagram of the first signaling indication set of auxiliary information, as shown in fig. 2. Fig. 2 illustrates the mapping of a set of assistance information in the first signaling, without excluding that the first signaling indicates multiple sets of assistance information.

In embodiment 2, the set of auxiliary information includes { signaling identifier, time-frequency location, and signaling format }, which are mapped to { first domain, second domain, and third domain } in the first signaling, respectively.

As sub-embodiment 1 of embodiment 2, the signaling identifier is an RNTI, the number of bits included in the first field is less than 16, and mapping between the first field and the RNTI is configured by a higher layer signaling. The sub-embodiment can effectively reduce the load size of the first signaling.

As sub-embodiment 2 of embodiment 2, the number of bits in the second domain corresponding to EPDCCH is larger than the number of bits in the second domain corresponding to PDCCH.

As sub-embodiment 3 of embodiment 2, if the transmission carrier of the first wireless signal is an FDD carrier, the number of bits in the third domain is one of {2, 3, 4, 5, 6 }.

Example 3

Embodiment 3 illustrates a resource allocation diagram of downlink multi-user superposition, as shown in fig. 3.

In embodiment 3, the base station first transmits the first signaling and 2 dynamic signaling. The 2 sets of assistance information are indicated in the first signaling. The 2 groups of auxiliary information and the 2 dynamic signaling are in one-to-one correspondence. The base station then transmits 2 wireless signals (i.e., the second wireless signal and the third wireless signal) and the first wireless signal. The UE first receives the first signaling, and respectively receives the 2 dynamic signaling according to the 2 sets of auxiliary information. Then the UE receives the second wireless signal and the third wireless signal respectively according to the scheduling information in the 2 dynamic signaling, then eliminates the components of the second wireless signal and the third wireless signal from the received signals, and then receives the first wireless signal according to the scheduling information of the first signaling.

In embodiment 3, the first signaling includes scheduling information of the first wireless signal, and the scheduling information in the 2 dynamic signaling is used for scheduling the 2 wireless signals, respectively. The time frequency resource occupied by each wireless signal in the 2 wireless signals is partially overlapped with the frequency domain resource occupied by the first wireless signal. The first signaling and the 2 dynamic signaling are both physical layer signaling. The second wireless signal and the third wireless signal are orthogonal in frequency domain resources. The power spectral densities of the second wireless signal and the third wireless signal are greater than the power spectral density of the first wireless signal.

Example 4

Embodiment 4 illustrates a block diagram of a processing device in a UE, as shown in fig. 4. In fig. 4, the UE processing apparatus 200 mainly includes a receiving module 201 and a receiving module 202.

The receiving module 201 is configured to receive a first signaling, and respectively receive K1 dynamic signaling according to the K1 sets of auxiliary information. The K1 auxiliary information is indicated by a first signaling, the K1 auxiliary information corresponds to the K1 dynamic signaling one to one, and the auxiliary information includes { signaling identifier, time-frequency position, signaling format }. The receiving module 202 is configured to receive K1 wireless signals according to the scheduling information in the K1 dynamic signaling, and receive a first wireless signal according to the scheduling information of a first signaling.

In embodiment 4, the time-frequency resource occupied by each of the K1 wireless signals and the time-frequency resource occupied by the first wireless signal are completely or partially overlapped, and K1 is a positive integer. The first signaling and the K1 dynamic signaling are both DCI for scheduling downlink transmission. The signaling format includes one or more of { whether or not CIF is included, whether or not SRS request is included, DCI format, transmission mode }. If the K1 is greater than 1, the K1 wireless signals are pairwise orthogonal on the time-frequency resource.

As sub embodiment 1 of embodiment 4, the receiving module 201 is further configured to:

receiving a second higher layer signaling determines a first integer for generating an initial value of a DMRS sequence shared by the first signaling and all signaling transmitted on the EPDCCH in the K1 sets of signaling.

Receiving third higher layer signaling to determine a second integer set, wherein the second integer set includes a plurality of integer elements different from each other. The auxiliary information corresponding to the EPDCCH in the K1 sets of auxiliary information further includes a DMRS associated integer, where the DMRS associated integer is used to generate an initial value of a DMRS sequence for corresponding dynamic signaling, and an index of the DMRS associated integer in the second integer set is indicated by the first signaling.

As sub-embodiment 1 of embodiment 4, the first signaling is a new DCI format, and the dynamic signaling is one of DCI formats {1, 1A, 1B, 1C, 1D, 2, 2A, 2B, 2C, 2D }.

Example 5

Embodiment 5 illustrates a block diagram of a processing device in a base station, as shown in fig. 5. In fig. 5, the base station processing apparatus 300 mainly comprises a transmitting module 301 and a transmitting module 302.

The sending module 301 is configured to send the first signaling and K1 dynamic signaling. The K1 set of side information is indicated in the first signaling. The K1 sets of auxiliary information and the K1 dynamic signaling are in one-to-one correspondence. The sending module 302 is configured to send K1 wireless signals and the first wireless signal.

In embodiment 5, the first signaling includes scheduling information of the first wireless signal, and the scheduling information in the K1 dynamic signaling is used for scheduling the K1 wireless signals, respectively. The time frequency resource occupied by each wireless signal in the K1 wireless signals is completely or partially overlapped with the time frequency resource occupied by the first wireless signal, and the K1 is a positive integer. The first signaling and the K1 dynamic signaling are both DCI for scheduling downlink transmission. If the K1 is greater than 1, the K1 wireless signals are non-overlapping pairwise on the time-frequency resource.

As sub-embodiment 1 of embodiment 5, the sending module 301 is further configured to send RRC signaling indications K3 EPDCCH-PRB-sets. For a target dynamic signaling transmitted on the EPDCCH in the K1 dynamic signaling, the corresponding auxiliary information includes a first index, that is, an index of an EPDCCH-PRB-set to which the target dynamic signaling belongs in the K3 EPDCCH-PRB-sets. For a given dynamic signaling transmitted on the PDCCH in the K1 dynamic signaling, the corresponding assistance information includes an index of the PDCCH occupied by the given dynamic signaling in a target PDCCH candidate set, where the target PDCCH candidate set is composed of all PDCCH candidates monitored by a target UE of the first signaling on a transmission subframe and a transmission carrier of the given dynamic signaling.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may 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 be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. The UE in the present invention includes but is not limited to a mobile phone, a tablet computer, a notebook, a network card, and other wireless communication devices. The base station in the present invention includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, and other wireless communication devices.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method in a UE supporting multi-user superposition, comprising the steps of:

a step a, receiving a first signaling, and receiving K1 dynamic signaling according to K1 sets of auxiliary information, wherein the K1 sets of auxiliary information are indicated by the first signaling, and the K1 sets of auxiliary information and the K1 dynamic signaling correspond to each other in a one-to-one manner, and the auxiliary information includes one or more of { signaling identifier, time-frequency position, and signaling format };

step B, receiving K1 wireless signals according to the scheduling information in the K1 dynamic signaling respectively, and receiving a first wireless signal according to the scheduling information of a first signaling;

wherein, the time frequency resource occupied by each of the K1 wireless signals and the time frequency resource occupied by the first wireless signal are completely or partially overlapped, the K1 is a positive integer, the first signaling and the K1 dynamic signaling are physical layer signaling, the signaling format includes one or more of { whether including CIF, whether including SRS request, DCI format, transmission mode }, if the K1 is greater than 1, the K1 wireless signals are pairwise orthogonal on the time frequency resource; the step A also comprises the following steps:

a step a1. receiving a first higher layer signaling to determine K3 EPDCCH-PRB-sets;

index of target EPDCCH-PRB-set among the K3 EPDCCH-PRB-sets;

the index of the EPDCCH candidate occupied by the target dynamic signaling in the target EPDCCH-PRB-set;

2. The method of claim 1, wherein the first wireless signal is transmitted by a DMRS antenna port, and wherein the UE assumes that the K1 wireless signals are all transmitted by DMRS antenna ports.

3. The method of claim 1, wherein a first wireless signal is transmitted by a CRS antenna port, and wherein the assistance information comprises the signaling format.

4. The method according to claim 1, wherein for a given dynamic signaling, the time-frequency location in the respective assistance information comprises an index of the PDCCH occupied by the given dynamic signaling in a target PDCCH candidate set consisting of all PDCCH candidates monitored by the UE on a transmission subframe and a transmission carrier of the given dynamic signaling; wherein the given dynamic signaling is each of the K1 dynamic signaling transmitted on the PDCCH.

5. The method of claim 1, wherein step a further comprises the steps of:

6. The method of claim 1, wherein step a further comprises the steps of:

-a step a3. receiving third higher layer signaling to determine a second integer set, the second integer set comprising a plurality of integer elements different from each other;

7. A method in a base station supporting multi-user superposition, comprising the steps of:

-step a. sending a first signaling in which K1 groups of side information are indicated and K1 dynamic signaling; the K1 groups of auxiliary information correspond to the K1 dynamic signaling one by one, and the auxiliary information comprises one or more of { signaling identification, time-frequency position and signaling format };

-step b. transmitting K1 radio signals and the first radio signal;

the first signaling comprises scheduling information of first wireless signals, the scheduling information in the K1 dynamic signaling is respectively used for scheduling the K1 wireless signals, time-frequency resources occupied by each wireless signal in the K1 wireless signals and time-frequency resources occupied by the first wireless signals are completely or partially overlapped, the K1 is a positive integer, the first signaling and the K1 dynamic signaling are physical layer signaling, the signaling format comprises one or more of { whether the signaling format includes CIF, whether the signaling format includes SRS request, DCI format, and transmission mode }, and if the K1 is greater than 1, the K1 wireless signals are orthogonal pairwise on the time-frequency resources;

the step A also comprises the following steps:

a step a1. sending a first higher layer signaling indication K3 EPDCCH-PRB-sets;

index of target EPDCCH-PRB-set among the K3 EPDCCH-PRB-sets.

8. The method of claim 7, wherein the first wireless signal is transmitted by a DMRS antenna port, and wherein the base station assumes that the K1 wireless signals are all transmitted by DMRS antenna ports.

9. The method of claim 7, wherein a first wireless signal is transmitted by a CRS antenna port, and wherein the assistance information comprises the signaling format.

10. The method of claim 7, wherein for a given dynamic signaling, the time-frequency position in the corresponding assistance information comprises an index of the PDCCH occupied by the given dynamic signaling in a target PDCCH candidate set consisting of all PDCCH candidates monitored by a target UE of a first signaling on a transmission subframe and a transmission carrier of the given dynamic signaling, wherein the given dynamic signaling is each dynamic signaling transmitted on the PDCCH in the K1 dynamic signaling.

11. The method of claim 7, wherein step a further comprises the steps of:

12. The method of claim 7, wherein step a further comprises the steps of:

a step a3. sending a third higher layer signaling indication second integer set, the second integer set comprising a plurality of integer elements different from each other;

13. A user equipment supporting multi-user superposition, comprising the following modules:

a first module: the system comprises a first signaling module, a second signaling module and a third signaling module, wherein the first signaling module is used for receiving first signaling, receiving K1 dynamic signaling according to K1 groups of auxiliary information respectively, the K1 groups of auxiliary information are indicated by the first signaling, the K1 groups of auxiliary information correspond to the K1 dynamic signaling one by one, and the auxiliary information comprises one or more of { signaling identification, time-frequency position and signaling format }

A second module: the system is used for receiving K1 wireless signals according to the scheduling information in the K1 dynamic signaling respectively and receiving a first wireless signal according to the scheduling information of a first signaling;

the first module further comprises the following:

-sending a first higher layer signaling indication K3 EPDCCH-PRB-sets;

index of target EPDCCH-PRB-set among the K3 EPDCCH-PRB-sets.

14. A base station device supporting multi-user superposition, comprising the following modules:

a first module: the system comprises a first signaling and K1 dynamic signaling, wherein the first signaling indicates K1 groups of auxiliary information, the K1 groups of auxiliary information and the K1 dynamic signaling are in one-to-one correspondence, and the auxiliary information comprises one or more of { signaling identification, time-frequency position and signaling format };

a second module: used for sending K1 wireless signals and the first wireless signal;

the first module further comprises the following:

-module a1. receiving a first higher layer signaling determining K3 EPDCCH-PRB-sets;

index of target EPDCCH-PRB-set among the K3 EPDCCH-PRB-sets;