WO2018196657A1

WO2018196657A1 - Interference cancellation method, user equipment, and network device

Info

Publication number: WO2018196657A1
Application number: PCT/CN2018/083392
Authority: WO
Inventors: 王婷; 梁津垚; 张弛; 窦圣跃; 李元杰
Original assignee: 华为技术有限公司
Priority date: 2017-04-24
Filing date: 2018-04-17
Publication date: 2018-11-01
Also published as: CN108738042A

Abstract

Disclosed in an embodiment of the present invention are an interference cancellation method, a user equipment unit, and a network device. The method comprises: a first user equipment unit acquiring a reference signal transmitted by a second user equipment unit; and the first user equipment unit performing, on the basis of the reference signal, cancellation of interference between the first user equipment unit and the second user equipment unit. The embodiment of the present invention facilitates increasing reliability in cancelling interference affecting a user equipment unit, thereby improving reliability of data reception.

Description

Interference cancellation method, user equipment and network equipment

Technical field

The present application relates to the field of communications technologies, and in particular, to an interference cancellation method, a user equipment, and a network device.

Background technique

With the continuous development of wireless communication technologies and terminal technologies, user equipment (English: User Equipment, abbreviated as UE), such as mobile phones, can use more and more functions, and various UEs are widely used, which brings great convenience to users. As the number of UEs in the communication network increases, interference may occur between the UEs. For example, there may be interference between the cell edge UE and the neighboring UE. The interference may cause the UE to receive the data accurately when receiving the data sent by the base station. data. Therefore, interference cancellation between UEs needs to be performed to improve the reliability of data reception.

Currently, when the interference cancellation of the UE is performed, the neighboring base station of the interfered UE sends a cell reference signal (Cell Reference Signal, abbreviated as CRS) to all UEs in the neighboring cell, and the interfered UE monitors the neighboring base station. The CRS is sent, and interference information of the interfered UE and the neighboring cell is obtained according to the CRS measurement to perform interference cancellation. That is to say, the interference cancellation of the currently interfered UE is directed to the cell level, resulting in unreliable interference cancellation operation, which makes it impossible to ensure the reliability of data reception.

Summary of the invention

The present application provides an interference cancellation method, a user equipment, and a network device, which can improve the reliability of interference cancellation of the interfered user equipment, thereby improving the reliability of data transmission.

In a first aspect, the present application provides an interference cancellation method, including:

The first user equipment acquires a reference signal from the second user equipment, and performs interference cancellation between the first user equipment and the second user equipment based on the reference signal.

Optionally, the first user equipment and the second user equipment may be in the same cell or in different cells, which is not limited in this application.

In some possible designs, the first user equipment acquires the reference signal from the second user equipment, where the first user equipment obtains the first scheduling information, where the first scheduling information is the scheduling information of the second user equipment. The first user equipment acquires a reference signal from the second user equipment based on the first scheduling information. Optionally, the scheduling information may be carried in downlink control information (English: Downlink Control Information, abbreviated as DCI).

In some possible designs, the first user equipment may also receive configuration information of the first scheduling information. Optionally, the configuration information may be sent by the first network device or the second network device to the first user device. Further, the first user equipment and the first network equipment may be in the same cell, and the second user equipment and the second network equipment may be in the same cell, for example, the first network device may be the first user equipment. The serving base station, the second network device may be a serving base station of the second user equipment. Further, the first user equipment acquires the first scheduling information, where the first user equipment obtains the first scheduling information based on the configuration information.

In some possible designs, the configuration information can be a high level message or a physical layer message. The high-level message may be a system message, or a radio resource control (English: Radio Resource Control, abbreviation: RRC) signaling, or a media access control (English: Medium Access Control, abbreviation: MAC) signaling, etc. The physical layer message may be physical layer DCI signaling, etc., which is not limited in this application.

In some possible designs, the first scheduling information may be carried in the first DCI. The first user equipment acquires the first scheduling information based on the configuration information, where the first user equipment monitors, according to the configuration information, the first DCI sent by the second network device to the second user equipment, and obtains the first The first scheduling information carried by a DCI. Optionally, the configuration information may include at least one of an identifier of the second user equipment, time-frequency domain information of the first DCI, format information of the first DCI, and bit information of the first DCI. Optionally, the first scheduling information may include port information, pattern information, sequence, orthogonal coverage code (OCC) information, modulation and coding strategy of the reference signal (English: Modulation and Coding Scheme, abbreviation: MCS) At least one of information, power information, precoding information, and the like. Therefore, the first user equipment can obtain the reference signal sent by the second user equipment according to the scheduling information by monitoring the scheduling information of the second user equipment, and perform interference cancellation/suppression with the reference signal.

In some possible designs, the first scheduling information may be carried in a second DCI, that is, an interference DCI, and the second DCI may be UE-level. The first user equipment acquires the first scheduling information based on the configuration information, where the first user equipment receives the second DCI based on the configuration information, and acquires the first scheduling information carried by the second DCI, where the first user equipment The second DCI is sent by the first network device or the second network device to the first user equipment. Optionally, the configuration information may include at least one of an identifier of the first user equipment, time-frequency domain information of the second DCI, format information of the second DCI, and bit information of the second DCI. Optionally, the first scheduling information may include at least one of port information, pattern information, sequence, OCC information, MCS information, power information, precoding information, and the like of the reference signal. Therefore, the first user equipment can obtain the scheduling information of the second user equipment according to the identifier of the second user equipment, and obtain the reference signal sent by the second user equipment according to the scheduling information, and perform interference cancellation/suppression with the reference signal.

In some possible designs, the first scheduling information may be carried in the second DCI, that is, the interference DCI, and the second DCI may also be at the cell level (or user equipment group UE group level). The first user equipment acquires the first scheduling information based on the configuration information, and may be: the first user equipment receives the second DCI based on the configuration information, and acquires the first scheduling information carried by the second DCI, where the second The DCI may be sent by the first network device or the second network device to the first user equipment. Optionally, the configuration information may include an identifier of a cell where the first user equipment is located (or an identifier of a UE group where the first user equipment is located), time-frequency domain information of the second DCI, format information of the second DCI, and the At least one of the bit information of the second DCI. Optionally, the first scheduling information may include at least one of port information, pattern information, sequence, OCC information, MCS information, power information, and precoding information of the reference signal. Therefore, the first user equipment can obtain the scheduling information of the second user equipment according to the identifier of the cell or the identifier of the UE group, and obtain the reference signal sent by the second user equipment according to the scheduling information, and then perform the reference signal by using the reference signal. Interference cancellation/suppression.

In some possible designs, the first user equipment acquires the first scheduling information, where the first user equipment receives the second DCI based on the identifier of the first user equipment or the identifier of the cell where the first user equipment is located. Obtaining the first scheduling information that is carried by the second DCI, where the second DCI is sent by the first network device or the second network device to the first user equipment. That is, the first user equipment may also receive the second DCI, that is, the interference DCI, according to the identifier defined by the protocol, for example, using the identity of the identity or the identity of the cell in which the cell is located or the identifier of the UE group to be descrambled to obtain the scheduling of the second user equipment. Information without the need for network devices such as base stations to configure or signal.

In some possible designs, the first user equipment may also receive a third DCI, ie, a data DCI, from the first network device. The third DCI may be used to indicate the second scheduling information, where the second scheduling information is scheduling information of the data that the first user equipment needs to receive, and the second DCI and/or the third DCI carries the first indication information, The first indication information may be used to indicate a type of DCI carrying the first indication information. Therefore, the first user equipment can receive the data indicated by the third DCI based on the third DCI.

In some possible designs, the interfering DCI and the data DCI may be independently configured. The first user equipment may receive the third DCI from the first network device, where the third DCI may be used to indicate second scheduling information, where the second scheduling information is scheduling information of data that the first user equipment needs to receive. Optionally, the third DCI may carry the second indication information, where the second indication information may be used to indicate whether there is interference level information such as the second DCI or the interference DCI of the interference DCI. Therefore, when the third DCI indicates that there is interference DCI, or the aggregation level indicating that the interference DCI is not 0, the first user equipment may further detect the interference DCI. Since the interference DCI is independent of the data DCI, if the interference DCI detection error or missed detection does not affect the reception of the data DCI, the reliability of the data DCI reception is improved, thereby ensuring the normal transmission of the data.

In some possible designs, the first DCI or the second DCI may also carry frequency domain information of the resource scheduled by the first scheduling information; and then the first user equipment performs the first user equipment and based on the reference signal. The interference cancellation between the second user equipment may be specifically: the first user equipment performs interference cancellation between the first user equipment and the second user equipment based on the reference signal and the frequency domain information. Therefore, the first user equipment may measure the reference signal of the second user equipment in a frequency domain in which the frequency domain information overlaps with the frequency domain information of the second user equipment according to the frequency domain information of the data, and may further target the overlapping Interference cancellation is performed in the frequency domain.

In some possible designs, the first DCI or the second DCI may only carry frequency domain information of resources scheduled by the scheduling information of the second user equipment, and may also carry multiple interference user equipments (including the second user equipment). The frequency domain information of the resources scheduled by the scheduling information. Therefore, for each frequency domain information, the first user equipment may interfere with the information based on the reference signal on the frequency domain information, and may further perform interference cancellation for the multiple frequency domain information.

In a second aspect, the present application further provides an interference cancellation method, including:

The first network device determines configuration information of the first scheduling information, and sends the configuration information to the first user equipment. The first scheduling information is scheduling information of the second user equipment, where

In some possible designs, the configuration information can be a high level message or a physical layer message. The high-level message may be a system message, or an RRC signaling, or a MAC signaling, etc., and the physical layer message may be a physical layer DCI signaling, and the like, which is not limited in this application.

In some possible designs, the first scheduling information may be carried in the first DCI. Optionally, the configuration information may include at least one of an identifier of the second user equipment, time-frequency domain information of the first DCI, format information of the first DCI, and bit information of the first DCI. Optionally, the first scheduling information may include at least one of port information, pattern information, sequence, OCC information, MCS information, power information, precoding information, and the like of the reference signal.

In some possible designs, the first scheduling information may be carried in the second DCI. Optionally, the configuration information may include at least one of an identifier of the first user equipment, time-frequency domain information of the second DCI, format information of the second DCI, and bit information of the second DCI. Further, the first network device may further send the second DCI to the first user equipment; or the configuration information may include an identifier of a cell where the first user equipment is located, and a time-frequency domain of the second DCI. At least one of the information, the format information of the second DCI, and the bit information of the second DCI; or the configuration information may include an identifier of the user equipment group where the first user equipment is located, and a time frequency of the second DCI At least one of domain information, format information of the second DCI, and bit information of the second DCI. The first scheduling information may include at least one of port information, pattern information, sequence, OCC information, MCS information, power information, and precoding information of the reference signal.

In some possible designs, the first network device may further send the second DCI based on the identifier of the first user equipment or the identifier of the cell where the first user equipment is located or the identifier of the user equipment group where the first user equipment is located. That is, the first network device may also send the second DCI, that is, the interference DCI, according to the identifier defined by the protocol, for example, using the identifier of the first user equipment or the identifier of the cell in which it is located or the identifier of the UE group in which the second user is carried. The second DCI of the scheduling information of the device is scrambled and then transmitted without first configuration or signaling by the first network device such as the base station.

In some possible designs, the first network device and the first user equipment may be in the same cell; then the first network device may also send a third DCI to the first user equipment. The third DCI may be used to indicate the second scheduling information, where the second scheduling information may be the scheduling information of the data that the first user equipment needs to receive, and the second DCI or the third DCI may carry the first indication. Information, the first indication information is used to indicate a type of DCI carrying the first indication information.

In some possible designs, the first network device and the first user equipment may be in the same cell; then the first network device may also send a third DCI to the first user equipment. The third DCI may be used to indicate second scheduling information, where the second scheduling information may be scheduling information of data that the first user equipment needs to receive. Optionally, the third DCI may carry the second indication information, where the second indication information is used to indicate whether there is interference level information such as the second DCI or the interference DCI of the interference DCI.

In some possible designs, the first DCI or the second DCI may also carry frequency domain information corresponding to the resource scheduled by the first scheduling information. Optionally, the first DCI or the second DCI may carry only the frequency domain information of the resource scheduled by the scheduling information of the second user equipment, and may also carry the scheduling information scheduling of multiple interfering user equipments (including the second user equipment). Frequency domain information for resources.

In a third aspect, the present application further provides a user equipment, where the network device includes: a transceiver unit and a processing unit, where the user equipment implements part or all of the first user equipment in the interference cancellation method of the foregoing first aspect by using the foregoing unit step. The unit may be software and/or hardware.

In a fourth aspect, the present application further provides a network device, where the network device includes: a processing unit and a transceiver unit, where the network device implements the first network device or the second network in the interference cancellation method of the foregoing second aspect by using the foregoing unit Part or all of the steps of the device. The unit can be software and/or hardware.

In a fifth aspect, the present application further provides a computer storage medium storing a program, the program including some or all of the steps of the interference cancellation method of the first aspect described above.

In a sixth aspect, the present application further provides a computer storage medium storing a program, the program including some or all of the steps of the interference cancellation method of the second aspect described above.

In a seventh aspect, the present application further provides a user equipment, including: a transceiver and a processor, where the processor is connected to the transceiver;

The transceiver is configured to send and receive signals;

The processor is configured to perform some or all of the steps of the interference cancellation method of the first aspect above.

In an eighth aspect, the present application further provides a network device, including: a transceiver and a processor, where the processor is connected to the transceiver;

The transceiver is configured to send and receive signals;

The processor is configured to perform some or all of the steps of the interference cancellation method of the second aspect above.

The ninth aspect, the application further provides an interference cancellation system, including a first user equipment, a second user equipment, a first network equipment, and a second network equipment; wherein the first user equipment or the second user equipment is used Performing part or all of the steps of the interference cancellation method of the above first aspect; the first network device or the second network device is configured to perform some or all of the steps of the interference cancellation method of the second aspect above.

In a tenth aspect, the present application also provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the methods described in the above aspects.

The first user equipment can obtain the scheduling information sent by the second user equipment according to the scheduling information by using the scheduling information of the second user equipment, so as to perform interference cancellation based on the reference signal, thereby improving data. The reliability of the transmission.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the background art, the drawings to be used in the embodiments of the present invention or the background art will be described below.

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

2 is a schematic diagram of interaction of an interference cancellation method according to an embodiment of the present invention;

3 is a schematic diagram of interaction of another interference cancellation method according to an embodiment of the present invention;

4 is a schematic structural diagram of a user equipment according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a network device according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of another user equipment according to an embodiment of the present disclosure;

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

detailed description

The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

It should be understood that the technical solution of the present application can be specifically applied to various communication systems, for example, Global System of Mobile communication (abbreviation: GSM), code division multiple access (English: Code Division Multiple Access, abbreviation: CDMA), Wideband Code Division Multiple Access (WCDMA), Time Division-Synchronous Code Division Multiple Access (English: Time Division-Synchronous Code Division Multiple Access, abbreviation: TD-SCDMA), Universal Mobile Telecommunications System (English: Universal Mobile Telecommunication System, abbreviation: UMTS), Long Term Evolution (English: Long Term Evolution, abbreviation: LTE) system, etc. With the continuous development of communication technology, the technical solution of the present application can also be used in future networks, such as The fifth generation mobile communication technology (English: The Fifth Generation Mobile Communication Technology, abbreviation: 5G) system, also known as the new air interface (English: New Radio, abbreviation: NR) system, or can be used for D2D (device to device) system , M2M (machine to machine) system and so on.

The network device involved in the present application may be a base station, or may be a transmission point (English: Transmission Point, abbreviation: TP), a transmission and reception point (English: transmission and receiver point, abbreviation: TRP), a relay device, or a base station function. Other network devices and the like are not limited in this application. In other optional embodiments, taking the network device as the base station as an example, the communication involved in the technical solution of the present application may be between the base station and the user equipment, or between the base station and the base station, such as a macro base station and The macro base station, or the macro base station and the micro base station (small base station), or between the micro base station and the micro base station, may also be between the user equipment and the user equipment, such as the communication in the D2D network. This application describes the communication between the base station and the user equipment as an example. Optionally, the present application is applicable to low frequency scenes (sub 6G), and also to high frequency scenes (6G or more).

In this application, the user equipment (English: User Equipment, abbreviation: UE) may also be called a terminal, a mobile station (English: Mobile Station, abbreviation: MS), a mobile terminal, a subscriber unit ( English: Subscriber Unit, abbreviation: SU), Subscriber Station (English: Subscriber Station, abbreviation: SS), mobile station (English: Mobile Station, abbreviation: MB), remote station (English: Remote Station, abbreviation: RS), pick up Entry point (English: Access Point, abbreviation: AP), remote terminal (English: Remote Terminal, abbreviation: RT), access terminal (English: Access Terminal, abbreviation: AT), user terminal (English: User Terminal, abbreviation: UT), user agent (English: User Agent, abbreviation: UA), terminal device (English: User Device, abbreviation: UD), etc., this application is not limited. The user equipment may refer to a wireless terminal or a wired terminal. The wireless terminal can be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem, which can be accessed via a radio access network (eg, RAN, radio access) Network) communicates with one or more core networks. For example, the user equipment can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal, and can also be a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device, such as Personal communication service (English: Personal Communication Service, abbreviation: PCS) telephone, cordless telephone, session initiation protocol (English: Session Initiation Protocol, abbreviation: SIP) telephone, wireless local loop (English: Wireless Local Loop, abbreviation: WLL) Stations, personal digital assistants (English: Personal Digital Assistant, PDA), etc., which exchange language and/or data with the wireless access network.

In the present application, a base station may refer to a device in an access network that communicates with user equipment over one or more sectors over an air interface, which may coordinate attribute management of the air interface. For example, the base station may be a base station in GSM or CDMA, such as a base transceiver station (BTS), or a base station in WCDMA, such as a NodeB, or an evolved base station in LTE, such as The eNB or the e-NodeB (evolutional Node B) may also be a base station in a 5G system, such as a gNB, or a base station in a future network, and the like, which is not limited in this application.

In the present application, a time unit may refer to a unit corresponding to a time unit. The time unit refers to a time unit or a scheduling unit in the time domain for performing information transmission. The time unit includes an integer number of symbols in the time domain. For example, the time unit may refer to a subframe or a slot. It can also refer to a radio frame, a mini slot or a subslot, multiple aggregated time slots, multiple aggregated sub-frames, symbols, etc., and may also refer to a transmission time interval (English: Transmission Time Interval, abbreviation) :TTI), this application is not limited. Wherein one or more time units of one time unit may contain an integer number of time units of another time unit, or one or more time units of one time unit have a length equal to an integer number of another The time unit length of the time unit and, for example, one minislot/slot/subframe/radio frame contains an integer number of symbols, and one slot/subframe/radio frame contains an integer number of minislots, one subframe/ The radio frame includes an integer number of time slots, and one radio frame includes an integer number of sub-frames, and the like.

The following describes the application scenario of the present application. This application describes the communication between the base station and the UE as an example. Referring to FIG. 1, FIG. 1 is a structural diagram of a communication system according to an embodiment of the present invention. Specifically, as shown in FIG. 1, the communication system includes at least one base station (two base stations shown in FIG. 1, that is, base station 1 and base station 2) and at least two UEs (two UEs are shown in FIG. UE1 and UE2), the base station and the UE can communicate with each other by using various communication systems, such as the 5G system in the above wireless communication system, which can also be called the NR system, and the LTE system, etc., thereby implementing information transmission. Optionally, the base station 1 and the UE1 may be in the same cell, and the base station 2 and the UE2 may be in the same cell, and the UE1 and the UE2 may be in the same cell or in different cells, for example, UE1 and UE2 may be in respective neighbors. Area. That is, the base station 1 may be a serving base station of the UE1, and the base station 2 may be a serving base station of the UE2.

When the information is transmitted, the uplink transmission of the UE2 may cause interference to the downlink transmission of the UE1, and the UE1 cannot accurately obtain the data sent to the UE1, for example, the downlink data sent by the base station 1 to the UE1 cannot be received. In addition, the downlink transmission of the UE1 may also cause interference to the uplink transmission of the UE2, so that the base station 2 cannot accurately acquire the uplink data sent by the UE2 to the base station 2. For example, in the time division duplex (English: Time Division Duplex, abbreviated: TDD) system, if the TDD ratio of the neighboring base stations is different, cross interference will occur in the system, as shown in Figure 1, when UE2 sends uplink data to the base station 2 The UE1 receives interference from the downlink data sent by the base station 1. When the base station 1 sends the downlink data to the UE1, the base station 1 interferes with the uplink data of the UE2 received by the base station 2. For example, in dynamic TDD (D-TDD), the uplink and downlink of each time unit, such as a subframe, may be semi-static or dynamically configured. When the configurations of two adjacent base stations are different, UE1 and UE2 may also be Interference, etc., are not listed here. Optionally, the UE that interferes with the downlink transmission of the UE1 may further include one or more other UEs, or the UE that interferes with the uplink transmission of the UE2 may further include other one or more UEs. When the present application causes interference to the downlink transmission of the UE1 by the uplink transmission of the UE2, the UE1 performs interference cancellation as an example.

The present application discloses an interference cancellation method, a user equipment, and a network device, which can improve the reliability of data transmission of the interfered user equipment.

Referring to FIG. 1, FIG. 2 is a schematic diagram of interaction of an interference cancellation method according to an embodiment of the present invention. Specifically, as shown in FIG. 2, the interference cancellation method in the embodiment of the present invention may include the following steps:

101. The UE1 acquires configuration information of the scheduling information of the base station 2 and the UE2.

Optionally, the configuration information of the scheduling information of the UE2 may be sent by the base station 1 to the UE1, and the UE1 receives the configuration information sent by the base station 1, and the configuration information may be obtained by interaction between the base station 1 and the base station 2, such as a base station. 1 when the UE2 is determined to generate interference to the UE1, the information request carrying the identifier of the UE2 is sent to the base station 2, and the requesting base station 2 sends the configuration information of the scheduling information of the UE2 to the base station 1; or the base station 2 may determine the UE2 pair. When UE1 generates interference, it actively sends configuration information of the scheduling information of the UE2 to the base station 1. For example, the base station 2 may send the configuration information of the scheduling information to the base station 1 through the X2 interface (if there are other UEs interfered by the UE2, the base station 2 may also send the configuration information to the base station where other UEs are located). Further, the configuration information of the scheduling information of the UE2 may be sent by the base station 2 to the UE1, that is, the UE1 receives the configuration information sent by the base station 2, and the like, and the manner in which the UE1 acquires the configuration information of the scheduling information of the UE2, The embodiments of the present invention are not limited.

Optionally, the scheduling information may be carried in the DCI (ie, the first DCI), where the configuration information may include, but is not limited to, the identifier of the UE2, the time-frequency domain information of the first DCI, and the first DCI. At least one of format information and bit information of the first DCI. Further, the first DCI may include, but is not limited to, a resource block (English: Resource Block, abbreviation: RB) resource location, a modulation mode, a redundancy version, a time-frequency resource location of the reference signal, a sequence of reference signals, At least one of a cyclic shift, an OCC sequence, a scrambling flag, a number of layers, an antenna port number, a number of code words, power information for transmitting the reference signal, and the like. Further, the identifier may be a radio network temporary identifier (English: Radio Network Tempory Identity, RNTI), and the RNTI may include, but is not limited to, a cell C-RNTI (Cell RNTI), semi-permanent scheduling (also known as semi-permanent scheduling) "Semi-persistent scheduling") SPS-RNTI (Semi-Persistent Scheduling RNTI), common SI-RNTI (System Information RNTI), paging P-RNTI (Paging RNTI), and random access RA-RNTI (Random Access RNTI) At least one of them.

Further, the base station 1 or the base station 2 can measure which UEs are interfering UEs, for example, the base station 1 or the base station 2 can measure and/or reference signals through radio resource management (English: Radio Resource Management, abbreviation: RRM). The received power (English: Reference Signal Receiving Power, abbreviated: RSRP) and/or the channel state information (CSI) are used to determine which UEs are interfering UEs, which may be based on the embodiment of the present invention. The foregoing measurement manner determines that UE2 is an interfering UE of UE1.

102. The base station 2 sends scheduling information to the UE2.

The UE1 monitors the scheduling information sent by the base station 2 to the UE2 based on the configuration information to obtain the scheduling information.

Optionally, the scheduling information may include, but is not limited to, one or more of port information of a reference signal, pattern information of a reference signal, a sequence of reference signals, OCC information, MCS information, power information, precoding information, and the like. . Further, the reference signal sent by the UE2 may be a demodulation reference signal (English: Demodulation Reference Signal, DMRS), a sounding reference signal (Sounding Reference Signal, SRS), or other reference signals. Not enumerated one by one.

Further, the configuration information related to the present application may be a high layer message or a physical layer message. The high-level message may be a system message, or a radio resource control (English: Radio Resource Control, abbreviation: RRC) signaling, or a media access control (English: Medium Access Control, abbreviation: MAC) signaling, etc. The physical layer message may be the physical layer downlink control information (English: Downlink Control Information, abbreviated as DCI) signaling, and the like, which is not limited in the embodiment of the present invention.

For example, the configuration information can be designed as follows:

The InterferenceDCIInfo may be used to indicate the interference DCI, that is, the configuration information of the first DCI; the physCellId may be used to indicate the cell information for transmitting the interference DCI, such as a physical cell identifier; the numerologyInfo may be used to indicate the numerology of the interference DCI (frame structure) The information, the frame structure information may include at least one of a subcarrier spacing, a cyclic prefix (English: Cyclic Prefix, CP) length, a number of time units, a length of a time unit corresponding to the time unit, and the like; subframeConfig It can be used to indicate the time domain information of the interference DCI, such as the subframe number, the slot number, the minislot number, etc.; the C-RNTI can be used to indicate the Cyclic Redundancy Check (abbreviation: CRC). The scrambled temporary identification information may be an interfering UE such as the C-RNTI of the UE2, and the DCI format may be used to indicate a control signaling format used by the interfering DCI, such as format0, format4, etc. in LTE; control resource set, It can be used to indicate a control channel resource set; the RS can be used to indicate configuration information of a reference signal of the demodulation control channel, such as Frequency resource location pattern, resource sequence, and so on. Optionally, the configuration information may include at least one of the foregoing signaling.

Optionally, the control resource set may be a resource location of a search space, such as a physical downlink control channel (English: Physical Downlink Control Channel, PDCCH), including a time-frequency resource location. For example, the frequency domain may be a piece of bandwidth, or may be a continuous resource block (English: Resource Block, abbreviation: RB) resource or a discontinuous RB resource, or one or more sub-bands, or a sub-band part, etc.; the time domain may be The number of time units, such as the number of symbols in a subframe or time slot or minislot (such as the first few symbols may be defaulted), or may be an identification of a time unit, such as a specific one or more symbol positions. The RB is a measure of the time-frequency resource size. For example, one RB in LTE is 12 subcarriers in the frequency domain and one time slot in the time domain. With the continuous development of the communication system, the RB resource block can be redefined, which is not limited in the embodiment of the present invention. Further, the control channel may also be an Enhanced Physical Downlink Control Channel (English: Enhanced Physical Downlink Control Channel, EPDCCH), and a New Radio Physical Downlink Control Channel (English: New Radio Physical Downlink Control Channel, abbreviation: NR- PDCCH) or other downlink channel with the above-mentioned functions defined by the network evolution, or may be an uplink control channel, such as a physical uplink control channel (English: Physical Uplink Control Channel, abbreviated as PUCCH), etc., the present application uses PDCCH. Give an example for explanation. Therefore, the UE 1 in the embodiment of the present invention can perform the determination of the PDCCH search space of the scheduling information and the blind detection in the control resource set.

Specifically, the PDCCH search space may be composed of a control channel element (English: Control Channel Element, abbreviated: CCE), and the CCE set may include one or more CCEs, for example, the CCEs in the set are numbered 0 to N _{CCE. , k} -1, where N _CCE,k is the total number of CCEs of the control region in subframe k. The CCE may be a basic unit of control channel resources, and the CCE may be composed of one or more resource element groups (English: Resource Element Group, abbreviation: REG), and the REG is composed of one or more resource elements RE, and the RE is basic. A resource unit, such as an RE in LTE, is a subcarrier on the frequency domain and a symbol on the time domain. Further, the search space may include one or more PDCCH candidate resources, and the candidate resources may be related to an aggregation level, where the aggregation level may be that one PDCCH is transmitted by several CCEs or carried on several CCE resources. Therefore, the UE1 can monitor the PDCCH candidate set on the one or more activated serving cells configured by the high layer signaling, that is, perform blind detection on the PDCCH search space corresponding to the serving cell, and try to decode each PDCCH candidate in the set. To obtain the scheduling information. Optionally, the mapping of REG to CCE and the mapping of CCE to search space candidates are predefined. For example, the mapping from the REG to the CCE may be a centralized mapping or a distributed mapping. The mapping from the REG to the CCE may be a pre-frequency domain re-time domain, or a time domain re-frequency domain, and the mapping of the CCE to the search space may be The frequency domain is in the time domain, and the time domain is also used in the frequency domain.

Optionally, the PDCCH search space is determined in multiple manners, and the embodiment of the present invention is exemplified as follows. The base station or UE is determining the search space

When you can determine the search space according to the following formula

L is the size of the Aggregation level, which may be 1, 2, 4, or 8, or may take other values. L represents the number of resource CCEs used to transmit the scheduling information, such as the PDCCH. N _CCE,k is the number of CCEs (Size) of the control region (ie, the control channel resource set) included in the time unit k such as the subframe k, i=, 0, . . . 1L- and m=0, . . . , M ^{(L) )} -1. M ^(L) is the number of PDCCH candidates that need to be monitored in a given search space. For example, the correspondence between L, N _{CCE, k} and M ^(L) can be as shown in Table 1 below.

Table I

Specifically, the search space can be divided into a common search space (Common) and a user search space (UE-specific, that is, a UE-specific search space). For the common search space, m'=m, Y _k is 0. For the user search space, Y _{k is} defined as: Y _k = (A·Y _k-1 ) mod D, where Y _-1 = n _RNTI ≠ 0, A = 39827, D = 65537,

n _s is a slot in the radio frame (slot) number (may be in the range of 0 to 19). Optionally, the search space may be determined based on other manners, which is not limited by the embodiment of the present invention. Therefore, the UE1 can detect the DCI sent by the base station 2, such as the neighboring base station, at the specified location, and then acquire the interference information of the UE2, such as the neighboring cell UE, and perform interference suppression/interference cancellation when the data is received. The _RNTI value may be a C-RNTI, or an SPS C-RNTI, or a temporary identifier such as a P-RNTI. The base station may send different control information according to different temporary identifiers. Therefore, the UE1 can find the search space where the control information is located according to the temporary identifier corresponding to the control information that needs to be received, and perform blind detection in the search space, such as Cyclic Redundancy Check (abbreviation: CRC). , indicating that the decoding is correct, that is, the correct control information is received, so that the UE1 can obtain the scheduling information of the UE2 from the control information, such as the DCI. If UE1 decodes correctly, the blind check is stopped.

104. The UE2 sends a reference signal to the base station 2 based on the scheduling information.

105. The UE1 receives the reference signal sent by the UE2 based on the scheduling information.

Further, after receiving the uplink DCI sent by the base station 2, the UE2 may send a reference signal, such as a DMRS, according to the location and policy information indicated by the scheduling information in the DCI, and the UE1 may also indicate the location and location based on the acquired scheduling information. The policy information further acquires the DMRS sent by the UE2.

106. The UE1 performs interference cancellation between the UE1 and the UE2 based on the reference signal.

Further, after the UE1 obtains the DMRS sent by the UE2, the interference information between the UE1 and the UE2, such as the interference of the uplink transmission of the UE2 to the downlink transmission of the UE1, may be obtained according to the DMRS measurement, and then the UE1 may according to the interference information. Perform interference cancellation. For example, UE1 may obtain interference covariance matrix or interference strength information or interference channel matrix or interference power information according to the received reference signal of UE2, so that UE1 can remove interference according to the interference feature information when performing data reception. The signal component makes the demodulation performance improved. For example, the UE1 may perform interference signal reconstruction, and may specifically acquire reference signals and configuration information of the interference signals according to the scheduling information. The configuration information of the interference signals may include the number of layers of the interference signal, the number of code words, the modulation and coding mode, and the redundancy version. Or at least one of the other information. The configuration information of the interference signal may be carried in the scheduling information, or may be carried in the DCI, or may be obtained by using the high layer signaling or the physical layer signaling, which is not limited in the embodiment of the present invention. Therefore, UE1 can reconstruct the interference signal through the configuration information, and iteratively eliminates it from the received signal until the last useful signal remains, which can improve the accuracy of signal reception. Further, the interference cancellation in the embodiment of the present invention may also refer to other methods for improving signal reception quality during signal reception, such as interference suppression or interference cancellation, or may also refer to performing interference measurement to feedback the accurate channel state of the base station. Information, etc., will not be described here.

Further, optionally, the first DCI may also carry the frequency domain information corresponding to the scheduling information, for example, when the UE1 is interfered by multiple UEs including the UE2, the first DCI may carry the scheduling of the UE2. Frequency domain information of resources for information scheduling. Therefore, when the UE1 measures the interference information between the UE1 and the UE2 based on the reference signal, such as the DMRS, the UE1 may measure the UE2 in the frequency domain where the frequency domain information overlaps with the frequency domain information of the UE2 according to the frequency domain information of the own data. The signal is referenced and interference cancellation can be further performed for the overlapping frequency domain.

Further, the first DCI may further carry frequency domain information of the resources scheduled by the scheduling information of the interfering UE (including the UE2), and for each frequency domain information, the UE1 may be based on the reference signal on the frequency domain information (eg, The DMRS) measures interference information between the UE1 and other UEs, and can further perform interference cancellation separately for the plurality of frequency domain information.

In the embodiment of the present invention, the base station may notify the UE1 of the configuration information of the scheduling information of the UE2, so that the UE1 can obtain the scheduling information of the UE2 based on the configuration information, and further decode the DMRS sent by the UE2 according to the scheduling information, so as to be based on the The DMRS performs interference cancellation, thereby improving the decoding performance of the UE1.

Referring to FIG. 3, FIG. 3 is a schematic diagram of interaction of another interference cancellation method according to an embodiment of the present invention. Specifically, as shown in FIG. 3, the interference cancellation method in the embodiment of the present invention may include the following steps:

201. The UE1 acquires scheduling information of the base station 2 and the UE2.

Optionally, the scheduling information of the UE2 may be carried in the DCI (ie, the second DCI) and sent to the UE1, so that the base station 1 or the base station 2 may send the second DCI carrying the scheduling information of the UE2 to the UE1, UE1. The second DCI carrying the scheduling information of the UE2 sent by the base station 1 or the base station 2 may be received. Specifically, if the scheduling information is sent by the base station 1 to the UE1, the scheduling information of the UE2 may be obtained by interaction between the base station 1 and the base station 2. For example, when the base station 1 determines that the UE2 generates interference to the UE1, the base station 1 may Sending an information request carrying the identifier of the UE2, requesting the base station 2 to send the scheduling information of the UE2 to the base station 1; or, when determining that the UE2 generates interference to the UE1, the base station 2 may actively send the scheduling information of the UE2 to the base station 1. Further, the scheduling information of the UE2 may be sent by the base station 2 to the UE1, for example, the base station 2 sends the second DCI that carries the scheduling information of the UE2 to the UE1, and so on, which is not limited in the embodiment of the present invention. Therefore, the UE1 can obtain the scheduling information of the UE2 by receiving the second DCI, and acquire the reference signal information sent by the UE2 based on the scheduling information of the UE2, thereby performing interference measurement.

Further, the UE1 may obtain the second DCI in real time when acquiring the scheduling information, or may detect the second DCI according to a preset time interval to obtain the UE2 carried by the second DCI. Scheduling information. For example, the base station 1 or the base station 2 can send the scheduling information that carries the identifier of the UE1 or the identifier of the cell where the UE1 is located to the UE1, so that the UE1 can obtain the second DCI by using the identifier of the UE1 or the identifier of the cell where the UE1 is located. The scheduling information carried by the second DCI. The scheduling information may include, but is not limited to, at least one of a reference signal such as port information of the DMRS, pattern information of the reference signal, a sequence of reference signals, OCC information, MCS information, power information, precoding information, and the like. Optionally, the identifier may be an RNTI, and the RNTI may include, but is not limited to, a C-RNTI, an SPS-RNTI, an SI-RNTI, a P-RNTI, or an RA-RNTI.

Further, the base station 1 or the base station 2 may also send configuration information of the scheduling information of the UE2 to the UE1 to instruct the UE1 to acquire the resource location of the scheduling information of the UE2. When acquiring the scheduling information, the UE1 may further obtain the scheduling information based on the configuration information of the scheduling information of the UE2 sent by the base station 1 or the base station 2, such as receiving the second DCI based on the configuration information, to obtain the scheduling information. , thereby improving the reliability and flexibility of obtaining scheduling information. The configuration information may include, but is not limited to, at least one of the identifier of the UE1, the identifier of the cell where the UE1 is located, the time-frequency domain information of the second DCI, the format information of the second DCI, and the bit information of the second DCI. Further, the scheduling information may include, but is not limited to, at least one of reference information such as port information of the DMRS, pattern information of the reference signal, sequence of reference signals, OCC information, MCS information, power information, precoding information, and the like. One.

For example, the configuration information of the scheduling information of the UE2 may be sent by the base station 1 to the UE1, and the configuration information of the scheduling information of the UE2 may be obtained by interaction between the base station 1 and the base station 2. For example, when determining that the UE2 generates interference to the UE1, the base station 1 may send an information request carrying the identifier of the UE2 to the base station 2, requesting the base station 2 to send the scheduling information of the UE2 to the base station 1; or the base station 2 may determine that the UE2 is the UE1. When interference occurs, the configuration information of the scheduling information of the UE2 is actively sent to the base station 1.

Further, the configuration information may be a high-level message or a physical layer message, which is not described here.

202. The base station 2 sends scheduling information to the UE2.

203. The UE2 sends a reference signal to the base station 2 based on the scheduling information.

204. The UE1 receives the reference signal sent by the UE2 based on the scheduling information.

Further, after receiving the uplink DCI sent by the base station 2, the UE2 may send a reference signal, such as a DMRS, according to the location and policy information indicated by the scheduling information in the DCI, and the location and policy indicated by the UE1 based on the acquired scheduling information. The information further acquires the DMRS sent by the UE2.

205. The UE1 performs interference cancellation between the UE1 and the UE2 based on the reference signal.

Further, the base station 1 may further send a third DCI, that is, data DCI, to the UE1, to indicate scheduling information of the data that the UE1 needs to receive, and the UE1 may receive the third DCI sent by the base station 1, and receive the third DCI based on the third DCI. The third DCI scheduled data. Further, the second DCI and/or the third DCI may carry first indication information, where the first indication information is used to indicate a type of DCI carrying the first indication information, where the type of the DCI includes data DCI or Interfere with DCI. That is, the base station 1 can send two types of DCI to the UE1, one is data DCI (ie, third DCI), which is used to indicate scheduling information of data (including control information) that needs to be received; and one is interference DCI (ie, Two DCI) is used for UE1 to perform uplink interference information detection, thereby performing interference cancellation/suppression. Optionally, an indication field is configured in the DCI to carry the first indication information, where the DCI is used to indicate whether the DCI is a data DCI or an interference DCI. For example, the first indication information is 0, and the DCI is a data DCI. The DCI may be the interference DCI; or the first indication information is 1 to indicate that the DCI is the data DCI, 0 is the DCI is the interference DCI, and the like, which are not enumerated here. Further, the interference cancellation in the embodiment of the present invention may also refer to other methods for improving signal reception quality during signal reception, such as interference suppression or interference cancellation, or may also refer to performing interference measurement to feedback the accurate channel state of the base station. Information, etc., will not be described here.

Further, the interference DCI may be UE-specific, cell-specific, or UE group-specific. The UE group may be obtained according to the UE location grouping, or may be obtained according to the UE interference situation, such as dividing the UEs interfered by the same UE into the same group, and so on, which are not enumerated here. If the interference DCI is UE level, the interference DCI may be scrambled by the identifier of the UE1, such as C-RNTI, so that the UE1 can descramble with the identifier of the UE1 to obtain the interference DCI; if the interference DCI is a cell level The interference DCI can be scrambled by the identifier of the cell where the UE1 is located, such as the Cell-ID, so that at least one UE including the UE1 can be descrambled by the identifier of the cell where the UE1 is located, for example, the cell identifier can be blindly searched in the search space. The interference DCI is obtained to obtain the interference DCI; if the interference DCI is at the UE group level, the interference DCI may be scrambled with the identifier of the UE1 group, such as the RNTI of the UE1 group, so that at least one UE including the UE1 can be used by the UE1 The identifier of the UE group is descrambled. For example, the interference DCI in the search space may be blindly detected by the UE-group to obtain the interference DCI. Optionally, the UE-group identifier or the cell identifier may also be notified to the UE by signaling.

Further, the base station 1 or the base station 2 may notify the UE1 whether to monitor the interference DCI or notify the UE1 as an interfered UE by using a high layer message or a physical layer message, so that the UE1 can be notified that it is required to monitor the interference DCI or The interference DCI is determined to be monitored when the UE is interfered. If the monitoring is determined, the UE1 can perform the monitoring of the interference DCI; if not, the UE1 does not need to be monitored, thereby reducing the UE complexity and reducing the UE monitoring overhead. Optionally, if the UE1 is required to perform the monitoring of the interference DCI, the UE1 may stop monitoring when the interference DCI is detected or the maximum number of blind detections is reached; or, if no message is notified to the UE1, the UE1 may monitor the data DCI or reach The maximum number of blind inspections stops monitoring. The high-level message may be a system message, or an RRC signaling, or a MAC signaling, and the like. The physical layer message may be DCI signaling, and the like, which is not limited by the embodiment of the present invention.

Optionally, the format of the interference DCI may be a new DCI format, and the number of bits may be smaller or the same as the normal DCI or larger than the normal DCI, which is not limited in the embodiment of the present invention.

Further optionally, the third DCI may further carry second indication information, where the second indication information is used to indicate whether there is aggregation level information of the second DCI or the second DCI. For example, an indication field of 1 bit may be added to the data DCI to indicate whether there is interference DCI or an aggregation level for indicating interference DCI. Wherein, when the aggregation level is 0, it can indicate that there is no interference DCI. Optionally, the base station may simultaneously indicate the aggregation level of the interference DCI when notifying the UE1 that the interference DCI exists, so that the UE1 can determine the search space according to the indicated aggregation level to perform blind detection, thereby reducing the number of blind detections of the UE, and reducing The complexity of the UE. Since the interference DCI is independent of the data DCI, if the interference DCI detection error or missed detection does not affect the reception of the data DCI, the reliability of the data DCI reception is improved, thereby ensuring the normal transmission of the data.

Further, optionally, the second DCI may also carry the frequency domain information of the resource scheduled by the scheduling information, for example, when the UE1 is interfered by multiple UEs including the UE2, the DCI sent to the UE1 may be carried. The frequency domain information of the resources of the scheduled resources of the multiple UEs may be, for example, the frequency domain information of the resources respectively scheduled by the scheduling information of the multiple UEs in one DCI, or the one DCI is carried by the multiple DCIs. The frequency domain information of the resource scheduled by the scheduling information of one of the multiple UEs is not limited in the embodiment of the present invention. Therefore, the UE1 may measure the reference signal in a frequency domain in which the frequency domain information overlaps with the frequency domain information in the second DCI according to the frequency domain information of the own data, and further perform interference cancellation on the overlapping frequency domain. For the specific manner in which the UE measures the interference information and performs the interference cancellation, refer to the related description of the foregoing embodiment, and details are not described herein.

For example, if the interference DCI is UE specific, the base station 1 may scramble the interference DCI with the C-RNTI of the UE, or scramble the RNTI of the UE group, so that at least one UE can receive the interference DCI. Optionally, the interference DCI may include at least one of the following information: uplink DMRS port information, pattern pattern information, sequence of uplink DMRS, OCC information, MCS information, power information, precoding information, and the like. Further, if the interference indication information of the UE is different in the different data frequency bands, the interference indication information may be indicated according to the frequency band of the data, that is, the scheduling information of the multiple interference UEs is carried in the interference DCI. Assuming that the interference DCI indicates two data frequency bands, that is, the frequency domain information 1 and the frequency domain information 2, the interference DCI may respectively carry scheduling information corresponding to the frequency domain information 1 and the frequency domain information 2, where the frequency domain information 1 corresponds to The scheduling information and/or the scheduling information corresponding to the frequency domain information 2 may include the foregoing uplink DMRS port information, pattern information, uplink DMRS sequence, OCC information, MCS information, power information, precoding information, and the like.

For another example, if the interference DCI is cell specific, the base station 1 can perform scrambling on the interference DCI by using a common cell identifier by configuring a new DCI format. Optionally, if the interference indication information of the UE is different in different data bands, the base station 1 may indicate multiple interference indication information according to the frequency band division, so that the interference DCI carries the scheduling information of multiple interference UEs. For example, the base station 1 may notify the interference information list of each sub-band for a resource block group (RBG-list), and the interference information, that is, the scheduling information may include at least one of the following information. Item: uplink DMRS port information, pattern information, sequence of uplink DMRS, OCC information, MCS information, power information, precoding information, etc., the interference DCI includes an RBG-list and an interference information List of each subband. Optionally, the interference information list has a corresponding relationship with the RBG, such as one-to-one or many-to-one, and the like, which is not limited herein. For example, the base station 1 can notify the RBG that has strong interference to notify the interference information, and the interference DCI can include: an RBG label, and interference information corresponding to the RBG label, etc., wherein the RBG label is used to indicate the data frequency band, thereby being able to pass The RBG label indicates the frequency domain information in which interference exists. An RBG may include one or more RBs, such as a subband, a partial bandwidth, a time-frequency domain resource, and the like. The RB resource block may be a scheduled basic time-frequency domain resource unit.

In the embodiment of the present invention, the base station may send the scheduling information of the UE2 to the UE1, so that the UE1 can obtain the scheduling information of the UE2, and then decode the DMRS sent by the UE2 according to the scheduling information, so as to perform interference cancellation based on the DMRS. The decoding performance of UE1 is improved.

Referring to FIG. 4, FIG. 4 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. Specifically, as shown in FIG. 4, the user equipment in the embodiment of the present invention may include a transceiver unit 11 and a processing unit 12. among them,

The transceiver unit 11 is configured to acquire a reference signal from another user equipment.

The processing unit 12 is configured to perform interference cancellation between the user equipment and the another user equipment based on the reference signal.

Optionally, the transceiver unit 11 is specifically configured to:

Obtaining first scheduling information, where the first scheduling information is scheduling information of another user equipment;

And obtaining a reference signal from the another user equipment based on the first scheduling information.

Optionally, the transceiver unit 11 is further configured to receive configuration information of the first scheduling information, where the configuration information is sent by the first network device or the second network device to the user equipment, and the user equipment and the first network The device is in the same cell, and the other user equipment and the second network device are in the same cell;

When the first scheduling information is obtained, the transceiver unit 11 can be specifically configured to:

The first scheduling information is obtained based on the configuration information.

Optionally, the configuration information may be a high layer message or a physical layer message. The high-level message may be a system message, or an RRC signaling, or a MAC signaling, and the like. The physical layer message may be DCI signaling, and the like, which is not limited by the embodiment of the present invention.

Optionally, the transceiver unit 11 is configured to: when acquiring the first scheduling information based on the configuration information, specifically:

The first DCI sent by the second network device to the other user equipment is monitored based on the configuration information, and the first scheduling information carried by the first DCI is obtained.

The configuration information may include at least one of an identifier of the another user equipment, time-frequency domain information of the first DCI, format information of the first DCI, and bit information of the first DCI. Optionally, the first scheduling information may include at least one of port information, pattern information, sequence, OCC information, MCS information, power information, and precoding information of the reference signal.

Receiving the second DCI based on the configuration information, and acquiring the first scheduling information that is carried by the second DCI, where the second DCI is sent by the first network device or the second network device to the user equipment.

The configuration information includes at least one of an identifier of the user equipment, time-frequency domain information of the second DCI, format information of the second DCI, and bit information of the second DCI. Further optionally, the first scheduling information includes at least one of port information, pattern information, sequence, OCC information, MCS information, power information, and precoding information of the reference signal.

The configuration information may include at least one of an identifier of a cell where the user equipment is located, time-frequency domain information of the second DCI, format information of the second DCI, and bit information of the second DCI. Optionally, the first scheduling information may include at least one of port information, pattern information, sequence, OCC information, MCS information, power information, and precoding information of the reference signal.

Optionally, when receiving the first scheduling information, the transceiver unit 11 may be specifically configured to:

Receiving, by the identifier of the user equipment or the identifier of the cell where the user equipment is located, the second DCI, and acquiring the first scheduling information that is carried by the second DCI, where the second DCI is the first network device or the second network device Sent to the user device.

Optionally, the transceiver unit 11 is further configured to receive a third DCI from the first network device, where the third DCI is used to indicate second scheduling information, where the second scheduling information is data that the user equipment needs to receive. The scheduling information, and the second DCI or the third DCI carries the first indication information, where the first indication information is used to indicate the type of the DCI carrying the first indication information;

The transceiver unit 11 is further configured to receive data of the third DCI indication based on the third DCI.

Further, the first DCI or the second DCI may further carry the frequency domain information of the resource scheduled by the first scheduling information; the processing unit 12 is specifically configured to:

Based on the reference signal and the frequency domain information, interference cancellation between the user equipment and the other user equipment is performed.

Optionally, the user equipment may implement some or all of the steps performed by the UE1 in the interference cancellation method in the foregoing embodiments of FIG. 2 to FIG. 3 by using the foregoing unit. It should be understood that the embodiments of the present invention are device embodiments corresponding to the method embodiments, and the description of the method embodiments is also applicable to the embodiments of the present invention.

Referring to FIG. 5, FIG. 5 is a schematic structural diagram of a network device according to an embodiment of the present invention. Specifically, as shown in FIG. 5, the network device in the embodiment of the present invention includes a processing unit 21 and a transceiver unit 22. among them,

The processing unit 21 is configured to determine configuration information of the first scheduling information.

The transceiver unit 22 is configured to send the configuration information to the first user equipment, where the first scheduling information is scheduling information of the second user equipment.

Optionally, the first scheduling information may be carried in the first DCI; the configuration information may include an identifier of the second user equipment, time-frequency domain information of the first DCI, format information of the first DCI, and the At least one of the bit information of a DCI. Optionally, the first scheduling information may include at least one of port information, pattern information, sequence, OCC information, MCS information, power information, and precoding information of the reference signal.

Optionally, the first scheduling information may be carried in the second DCI; the configuration information may include the identifier of the first user equipment, the identifier of the cell where the first user equipment is located, and the time-frequency domain information of the second DCI. At least one of format information of the second DCI and bit information of the second DCI. Further optional,

The transceiver unit 22 is further configured to send the second DCI to the first user equipment. The first scheduling information may include at least one of port information, pattern information, sequence, OCC information, MCS information, power information, and precoding information of the reference signal.

Optionally, the first network device and the first user equipment may be in the same cell;

The transceiver unit 22 is further configured to send, to the first user equipment, a third DCI, where the third DCI is used to indicate second scheduling information, where the second scheduling information is scheduling information of data that the first user equipment needs to receive, The first DCI or the third DCI carries the first indication information, where the first indication information is used to indicate the type of the DCI carrying the first indication information.

Further, the first DCI or the second DCI may further carry frequency domain information corresponding to the resource scheduled by the first scheduling information.

Optionally, the network device may implement some or all of the steps performed by the base station 1 or the base station 2 in the interference cancellation method in the foregoing embodiments of FIG. 2 to FIG. 3 by using the foregoing unit. It should be understood that the embodiments of the present invention are device embodiments corresponding to the method embodiments, and the description of the method embodiments is also applicable to the embodiments of the present invention.

In the embodiment of the present invention, the first user equipment may obtain the scheduling information of the second user equipment, and then decode the reference signal sent by the second user equipment according to the scheduling information, so as to perform interference cancellation based on the reference signal, thereby improving The decoding performance of the user equipment improves the reliability of interference cancellation of the interfered user equipment, thereby improving the reliability of data transmission.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of another user equipment according to an embodiment of the present invention. Specifically, as shown in FIG. 6, the user equipment in the embodiment of the present invention may include: a transceiver 200 and a processor 100, where the processor 100 is connected to the transceiver 200. Optionally, the user equipment may further include a memory 300.

The transceiver 200, the memory 300, and the processor 100 may be connected to each other through a bus, or may be connected by other means. In the present embodiment, a bus connection will be described.

The processor 100 may be a central processing unit (English: Central Processing Unit, abbreviated as CPU), a network processor (English: Network Processor, abbreviated as NP) or a combination of a CPU and an NP.

The processor 100 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (English: Application-Specific Integrated Circuit, ASIC), a programmable logic device (English: Programmable Logic Device, abbreviation: PLD) or a combination thereof. The above PLD can be a complex programmable logic device (English: Complex Programmable Logic Device, abbreviation: CPLD), Field-Programmable Gate Array (English: Field-Programmable Gate Array, abbreviation: FPGA), general array logic (English: Generic Array Logic, abbreviation: GAL) or any combination thereof.

The memory 300 may include a volatile memory (English: Volatile Memory), such as a random access memory (English: Random-Access Memory, abbreviation: RAM); the memory may also include a non-volatile memory (English: non-volatile) Memory), such as flash memory (English: flash memory), hard disk (English: Hard Disk Drive, abbreviated: HDD) or solid state hard disk (English: Solid-State Drive, abbreviated: SSD); the memory 300 may also include the above types A combination of memories.

Optionally, the memory 300 can be used to store program instructions, and the processor 100 can call the program instructions stored in the memory 300, and can perform one or more steps in the embodiment shown in FIG. 2 to FIG. 3, or The selected embodiment enables the user equipment to implement the functions in the above method. For example, the user equipment may implement some or all of the steps performed by the user equipment, such as the UE1, in the interference cancellation method in the foregoing embodiments of FIG. 2 to FIG. 3 through the above components. Alternatively, the transceiver may correspond to the transceiver unit in the embodiment shown in FIG. 4, and the processor may correspond to the processing unit in the embodiment shown in FIG.

Specifically, the processor 100 is configured to: invoke the transceiver 200 to acquire a reference signal from another user equipment; perform interference between the user equipment and the another user equipment based on the reference signal. eliminate.

Optionally, when the processor 100 performs the acquiring a reference signal from another user equipment, the method is specifically configured to: invoke the transceiver 200 to acquire first scheduling information, where the first scheduling information is another Scheduling information of the user equipment; invoking the transceiver 200 and acquiring a reference signal from the another user equipment based on the first scheduling information.

Optionally, the processor 100 is further configured to: invoke the transceiver 200 to receive configuration information of the first scheduling information, where the configuration information is sent by the first network device or the second network device to the user The device, and the user equipment and the first network device are in the same cell, and the other user equipment and the second network device are in the same cell; when the processor 100 performs the acquisition of the first scheduling information, the specific For performing: calling the transceiver 200 and acquiring the first scheduling information based on the configuration information.

Optionally, when the processor 100 is configured to acquire the first scheduling information based on the configuration information, specifically, the method is: performing: calling the transceiver 200 and listening to the second network device based on the configuration information. Sending the first DCI to the another user equipment, and acquiring the first scheduling information carried by the first DCI; wherein the configuration information includes an identifier of the another user equipment, the first DCI At least one of time-frequency domain information, format information of the first DCI, and bit information of the first DCI; the first scheduling information includes port information, pattern information, sequence, OCC of the reference signal At least one of information, MCS information, power information, and precoding information.

Optionally, when the processor 100 is configured to acquire the first scheduling information based on the configuration information, specifically, the method is configured to: invoke the transceiver 200, and receive a second DCI based on the configuration information, and obtain The first scheduling information carried by the second DCI, where the second DCI is sent by the first network device or the second network device to the user equipment, where the configuration information includes the At least one of an identifier of the user equipment, time-frequency domain information of the second DCI, format information of the second DCI, and bit information of the second DCI; the first scheduling information includes the reference signal At least one of port information, pattern information, sequence, OCC information, MCS information, power information, and precoding information.

Optionally, when the processor 100 is configured to acquire the first scheduling information based on the configuration information, specifically, the method is configured to: invoke the transceiver 200, and receive a second DCI based on the configuration information, and obtain The first scheduling information carried by the second DCI, where the second DCI is sent by the first network device or the second network device to the user equipment, where the configuration information includes the At least one of an identifier of a cell where the user equipment is located, time-frequency domain information of the second DCI, format information of the second DCI, and bit information of the second DCI; the first scheduling information includes the At least one of port information, pattern information, sequence, OCC information, MCS information, power information, and precoding information of the reference signal.

Optionally, when the processor 100 performs the acquiring the first scheduling information, the method is specifically configured to: invoke the transceiver 200 and receive the first according to the identifier of the user equipment or the identifier of the cell where the user equipment is located. And the second DCI is sent by the first network device or the second network device to the user equipment.

Optionally, the processor 100 is further configured to: invoke the transceiver 200 to receive a third DCI from the first network device, where the third DCI is used to indicate second scheduling information, where the The second scheduling information is the scheduling information of the data that the user equipment needs to receive, and the second DCI or the third DCI carries the first indication information, where the first indication information is used to indicate that the first indication is carried. The type of DCI of the information; the transceiver 200 is invoked and the data indicated by the third DCI is received based on the third DCI.

Optionally, the first DCI or the second DCI further carries frequency domain information of the resource scheduled by the first scheduling information; the processor 100 performs the performing the user equipment based on the reference signal And performing interference cancellation between the user equipment and the another user equipment based on the reference signal and the frequency domain information when performing interference cancellation between the user equipment and the another user equipment.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of another network device according to an embodiment of the present invention. Specifically, as shown in FIG. 7, the network device in the embodiment of the present invention may include a transceiver 500 and a processor 400, and the processor 400 is connected to the transceiver 500. Optionally, the network device may further include a memory 600.

The transceiver 500, the memory 600, and the processor 400 may be connected to each other through a bus, or may be connected by other means. In the present embodiment, a bus connection will be described.

The processor 400 can be a CPU, an NP or a combination of a CPU and an NP.

The processor 400 may further include a hardware chip. The above hardware chip may be an ASIC, a PLD, or a combination thereof. The above PLD may be a CPLD, an FPGA, a GAL, or any combination thereof.

The memory 600 may include a volatile memory (English: Volatile Memory), such as a RAM; the memory may also include a non-volatile memory (English: non-volatile memory), such as flash memory (HD memory), HDD Or SSD; the memory 600 may also include a combination of the above types of memories.

The network device may be a base station. Optionally, the memory 600 can be used to store program instructions, and the processor 400 can call the program instructions stored in the memory 600, and can perform one or more steps in the embodiment shown in FIG. 2 to FIG. 3, or The selected embodiment enables the network device to implement the functions in the above method. For example, the network device may implement some or all of the steps performed by the network device, such as the base station 1 or the base station 2, in the interference cancellation method in the foregoing embodiments of FIG. 2 to FIG. 3 through the above components. Alternatively, the transceiver may correspond to the transceiver unit in the embodiment shown in FIG. 5, and the processor may correspond to the processing unit in the embodiment shown in FIG.

Specifically, the processor 400 is configured to: determine configuration information of the first scheduling information, and invoke the transceiver 500 to send the configuration information to the first user equipment; where the first scheduling information is the second Scheduling information of the user equipment.

Optionally, the first scheduling information may be carried in the first DCI; the configuration information may include an identifier of the second user equipment, time-frequency domain information of the first DCI, and the first DCI. At least one of format information and bit information of the first DCI; the first scheduling information may include port information, pattern information, sequence, orthogonal cover coding OCC information, modulation and coding strategy MCS of the reference signal At least one of information, power information, and precoding information.

Optionally, the first scheduling information is carried in the second downlink control information DCI; the configuration information includes an identifier of the first user equipment, an identifier of a cell where the first user equipment is located, and the second At least one of time-frequency domain information of the DCI, format information of the second DCI, and bit information of the second DCI. Further, the processor 400 is further configured to: invoke the transceiver 500 to send the second DCI to the first user equipment, where the first scheduling information includes a port of the reference signal At least one of information, pattern information, sequence, orthogonal cover coded OCC information, modulation and coding strategy MCS information, power information, and precoding information.

Optionally, the network device may be in the same cell as the first user equipment, where the processor 400 is further configured to: invoke the transceiver 500 to send a third DCI to the first user equipment, where The third DCI is used to indicate the second scheduling information, where the second scheduling information is scheduling information of the data that the first user equipment needs to receive, and the second DCI or the third DCI carries the first indication information. The first indication information is used to indicate a type of DCI carrying the first indication information.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present invention are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).

Claims

An interference cancellation method, comprising:

The first user equipment acquires a reference signal from the second user equipment;

The first user equipment performs interference cancellation between the first user equipment and the second user equipment based on the reference signal.
The method according to claim 1, wherein the first user equipment acquires a reference signal from the second user equipment, including:

The first user equipment acquires first scheduling information, where the first scheduling information is scheduling information of the second user equipment;

The first user equipment acquires a reference signal from the second user equipment based on the first scheduling information.
The method of claim 2, wherein the method further comprises:

The first user equipment receives the configuration information of the first scheduling information, where the configuration information is sent by the first network device or the second network device to the first user equipment, and the first user equipment and the The first network device is in the same cell, and the second user device and the second network device are in the same cell;

The acquiring, by the first user equipment, the first scheduling information includes:

The first user equipment acquires the first scheduling information based on the configuration information.
The method according to claim 3, wherein the acquiring, by the first user equipment, the first scheduling information based on the configuration information comprises:

The first user equipment, according to the configuration information, listens to the first DCI that is sent by the second network device to the second user equipment, and acquires the first scheduling information that is carried by the first DCI;

The configuration information includes at least one of an identifier of the second user equipment, time-frequency domain information of the first DCI, format information of the first DCI, and bit information of the first DCI.

The first scheduling information includes at least one of port information, pattern information, sequence, orthogonal cover coded OCC information, modulation and coding policy MCS information, power information, and precoding information of the reference signal.
The method according to claim 3, wherein the acquiring, by the first user equipment, the first scheduling information based on the configuration information comprises:

The first user equipment receives the second DCI based on the configuration information, and acquires the first scheduling information that is carried by the second DCI, where the second DCI is the first network device or the second network. Sending the device to the first user equipment;

The configuration information includes at least one of an identifier of the first user equipment, time-frequency domain information of the second DCI, format information of the second DCI, and bit information of the second DCI.

The first scheduling information includes at least one of port information, pattern information, sequence, orthogonal cover coded OCC information, modulation and coding policy MCS information, power information, and precoding information of the reference signal.
The method according to claim 3, wherein the acquiring, by the first user equipment, the first scheduling information based on the configuration information comprises:

The first user equipment receives the second DCI based on the configuration information, and acquires the first scheduling information that is carried by the second DCI, where the second DCI is the first network device or the second network. Sending the device to the first user equipment;

The configuration information includes at least one of an identifier of a cell where the first user equipment is located, time-frequency domain information of the second DCI, format information of the second DCI, and bit information of the second DCI. item;

The first scheduling information includes at least one of port information, pattern information, sequence, orthogonal cover coded OCC information, modulation and coding policy MCS information, power information, and precoding information of the reference signal.
The method according to claim 2, wherein the acquiring, by the first user equipment, the first scheduling information comprises:

The first user equipment receives the second DCI based on the identifier of the first user equipment or the identifier of the cell where the first user equipment is located, and acquires the first scheduling information carried by the second DCI, The second DCI is sent by the first network device or the second network device to the first user equipment.
The method of any of claims 5-7, wherein the method further comprises:

The first user equipment receives a third DCI from the first network device, where the third DCI is used to indicate second scheduling information, where the second scheduling information is data that the first user equipment needs to receive. Scheduling information, and the second DCI or the third DCI carries indication information, where the indication information is used to indicate a type of DCI carrying the indication information;

The first user equipment receives data indicated by the third DCI based on the third DCI.
The method according to any one of claims 4-7, wherein the first DCI or the second DCI further carries frequency domain information of resources scheduled by the first scheduling information; The user equipment performs interference cancellation between the first user equipment and the second user equipment based on the reference signal, including:

The first user equipment performs interference cancellation between the first user equipment and the second user equipment based on the reference signal and the frequency domain information.
An interference cancellation method, comprising:

The network device determines configuration information of the first scheduling information, and sends the configuration information to the first user equipment;

The first scheduling information is scheduling information of the second user equipment.
The method according to claim 10, wherein the first scheduling information is carried in the first downlink control information DCI; the configuration information includes an identifier of the second user equipment, and the first DCI At least one of time-frequency domain information, format information of the first DCI, and bit information of the first DCI;

The first scheduling information includes at least one of port information, pattern information, sequence, orthogonal cover coded OCC information, modulation and coding policy MCS information, power information, and precoding information of the reference signal.
The method according to claim 10, wherein the first scheduling information is carried in the second downlink control information DCI; the configuration information includes an identifier of the first user equipment, where the first user equipment is located At least one of the identifier of the cell, the time-frequency domain information of the second DCI, the format information of the second DCI, and the bit information of the second DCI; the method further includes:

Sending, by the network device, the second DCI to the first user equipment;

The first scheduling information includes at least one of port information, pattern information, sequence, orthogonal coverage coded OCC information, modulation and coding policy MCS information, power information, and precoding information of the reference signal.
The method according to claim 10, wherein the network device and the first user equipment are in the same cell; the method further includes:

The network device sends a third DCI to the first user equipment, where the third DCI is used to indicate second scheduling information, where the second scheduling information is scheduling information of data that the first user equipment needs to receive, And the second DCI or the third DCI carries indication information, where the indication information is used to indicate a type of DCI carrying the indication information.
The method according to any one of claims 11 to 13, wherein the first DCI or the second DCI further carries frequency domain information corresponding to resources scheduled by the first scheduling information.
A user equipment, comprising:

a transceiver unit, configured to acquire a reference signal from another user equipment;

And a processing unit, configured to perform interference cancellation between the user equipment and the another user equipment based on the reference signal.
The user equipment according to claim 15, wherein the transceiver unit is specifically configured to:

Obtaining first scheduling information, where the first scheduling information is scheduling information of another user equipment;

And acquiring a reference signal from the another user equipment based on the first scheduling information.
The user equipment according to claim 16, wherein

The transceiver unit is further configured to receive configuration information of the first scheduling information, where the configuration information is sent by the first network device or the second network device to the user equipment, and the user equipment and the One network device is in the same cell, and the other user equipment and the second network device are in the same cell;

When the transceiver unit acquires the first scheduling information, the transceiver unit is specifically configured to:

Acquiring the first scheduling information based on the configuration information.
The user equipment according to claim 17, wherein the transceiver unit is configured to: when acquiring the first scheduling information based on the configuration information, specifically:

And monitoring the first DCI that is sent by the second network device to the another user equipment, and acquiring the first scheduling information that is carried by the first DCI;

The configuration information includes at least one of an identifier of the another user equipment, time-frequency domain information of the first DCI, format information of the first DCI, and bit information of the first DCI.

The first scheduling information includes at least one of port information, pattern information, sequence, orthogonal cover coded OCC information, modulation and coding policy MCS information, power information, and precoding information of the reference signal.
The user equipment according to claim 17, wherein the transceiver unit is configured to: when acquiring the first scheduling information based on the configuration information, specifically:

Receiving the second DCI based on the configuration information, and acquiring the first scheduling information that is carried by the second DCI, where the second DCI is sent by the first network device or the second network device to the user equipment;

The configuration information includes at least one of an identifier of the user equipment, time-frequency domain information of the second DCI, format information of the second DCI, and bit information of the second DCI.

The first scheduling information includes at least one of port information, pattern information, sequence, orthogonal cover coded OCC information, modulation and coding policy MCS information, power information, and precoding information of the reference signal.
The user equipment according to claim 17, wherein the transceiver unit is configured to: when acquiring the first scheduling information based on the configuration information, specifically:

Receiving the second DCI based on the configuration information, and acquiring the first scheduling information that is carried by the second DCI, where the second DCI is sent by the first network device or the second network device to the user equipment;

The configuration information includes at least one of an identifier of a cell where the user equipment is located, time-frequency domain information of the second DCI, format information of the second DCI, and bit information of the second DCI.

The first scheduling information includes at least one of port information, pattern information, sequence, orthogonal cover coded OCC information, modulation and coding policy MCS information, power information, and precoding information of the reference signal.
The user equipment according to claim 16, wherein the transceiver unit is configured to: when acquiring the first scheduling information, specifically:

Receiving a second DCI based on the identifier of the user equipment or the identifier of the cell where the user equipment is located, and acquiring the first scheduling information that is carried by the second DCI, where the second DCI is the first network device Or the second network device is sent to the user equipment.
User equipment according to any one of claims 19-21, characterized in that

The transceiver unit is further configured to receive a third DCI from the first network device, where the third DCI is used to indicate second scheduling information, where the second scheduling information is data that the user equipment needs to receive. Scheduling information, and the second DCI or the third DCI carries indication information, where the indication information is used to indicate a type of DCI carrying the indication information;

The transceiver unit is further configured to receive data indicated by the third DCI based on the third DCI.
The user equipment according to any one of claims 18 to 21, wherein the first DCI or the second DCI further carries frequency domain information of resources scheduled by the first scheduling information; The unit is specifically used to:

And performing interference cancellation between the user equipment and the another user equipment based on the reference signal and the frequency domain information.
A network device, comprising:

a processing unit, configured to determine configuration information of the first scheduling information, where the first scheduling information is scheduling information of the second user equipment;

And a transceiver unit, configured to send the configuration information to the first user equipment.
The network device according to claim 24, wherein the first scheduling information is carried in the first downlink control information DCI; the configuration information includes an identifier of the second user equipment, the first DCI At least one of time-frequency domain information, format information of the first DCI, and bit information of the first DCI;

The first scheduling information includes at least one of port information, pattern information, sequence, orthogonal cover coded OCC information, modulation and coding policy MCS information, power information, and precoding information of the reference signal.
The network device according to claim 24, wherein the first scheduling information is carried in the second downlink control information DCI; the configuration information includes an identifier of the first user equipment, the first user equipment At least one of an identifier of the cell in which it is located, time-frequency domain information of the second DCI, format information of the second DCI, and bit information of the second DCI;

The transceiver unit is further configured to send the second DCI to the first user equipment;

The first scheduling information includes at least one of port information, pattern information, sequence, orthogonal coverage coded OCC information, modulation and coding policy MCS information, power information, and precoding information of the reference signal.
The network device according to claim 24, wherein the first network device and the first user equipment are in the same cell;

The transceiver unit is further configured to send a third DCI to the first user equipment, where the third DCI is used to indicate second scheduling information, where the second scheduling information is data that the first user equipment needs to receive. The scheduling information, and the second DCI or the third DCI carries indication information, where the indication information is used to indicate a type of DCI carrying the indication information.
The network device according to any one of claims 25 to 27, wherein the first DCI or the second DCI further carries frequency domain information corresponding to resources scheduled by the first scheduling information.
A user equipment, comprising: a transceiver and a processor, wherein the processor is connected to the transceiver; wherein

The processor is configured to execute:

Invoking the transceiver to acquire a reference signal sent by the second user equipment;

Interference cancellation between the first user equipment and the second user equipment is performed based on the reference signal.
A network device, comprising: a transceiver and a processor, wherein the processor is connected to the transceiver; wherein

The processor is configured to execute:

Determining configuration information of the first scheduling information, and invoking the transceiver to send the configuration information to the first user equipment;

The first scheduling information is scheduling information of the second user equipment.