CN112788751B

CN112788751B - Method and device for transmitting control information

Info

Publication number: CN112788751B
Application number: CN201911081342.XA
Authority: CN
Inventors: 王磊; 陈雁; 张云昊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2023-03-10
Anticipated expiration: 2039-11-07
Also published as: CN112788751A

Abstract

The application provides a method and a device for transmitting control information, which can reduce the blind detection complexity of target terminal equipment by adding transmission parameter information of the control information of the interference terminal equipment in the control information of the target terminal equipment. The method comprises the following steps: a first terminal device (or a chip in the first terminal device) receives first control information from a network device, wherein the first control information comprises transmission parameter information of second control information of a second terminal device; and then, the first terminal equipment determines the physical layer transmission parameters of the second terminal equipment according to the first control information.

Description

Method and device for transmitting control information

Technical Field

The present application relates to the field of communications, and more particularly, to a method and apparatus for transmitting control information.

Background

Multiple-input multiple-output (MIMO) technology based on multiple antennas has been widely used in the field of wireless communication. MIMO technology is generally classified into two types, spatial multiplexing and spatial diversity. For spatial multiplexing, a base station simultaneously schedules multiple User Equipments (UEs) for signal transmission on the same time-frequency resource. The base station adopts corresponding pre-coding for signals of different UEs, and can ensure that the signals of a plurality of UEs are orthogonal or approximately orthogonal in a space domain. Particularly in the fifth generation (5g) system, the system can support more UEs for space division multiplexing due to the use of Massive MIMO.

For downlink signal transmission, in order to calculate downlink precoding, the base station needs to obtain downlink channel information of each UE in advance. However, in practical applications, due to non-ideal factors such as channel measurement delay or measurement error, it is difficult for the base station to obtain completely accurate downlink channel information, which causes that multi-user signals are not completely orthogonal, i.e. there is multi-user interference. The performance of the system may be degraded by multi-user interference.

To solve the multi-user interference problem, interference cancellation techniques may be used at the receiving end. Interference cancellation can be divided into symbol-level interference cancellation and codeword-level interference cancellation. Symbol-level interference cancellation is independent of channel coding. The receiving end only cancels the modulation symbol of the interference user in the demodulation module, so the receiving end can realize the interference elimination at the symbol level only by obtaining one or more of the modulation parameter, the transmission power parameter and the precoding parameter of the interference user. The interference elimination at the code word level is complex, and the receiving end uses the result of channel decoding in the interference elimination process, so that the receiving end can realize the interference elimination at the code word level only by obtaining the information such as channel coding parameters corresponding to the interference users. Currently, in long-term evolution (LTE), a multi-user superposition transmission system (MUST) technology is proposed. The base station may schedule the two UEs in the same time-frequency resource for downlink signal transmission. Multiple users in the mud scenario may overlap transmission on the same spatial resource, or may overlap transmission on different spatial resources, that is, the two users may use the same precoding or different precoding. In the MUST, the receiver performs interference cancellation by obtaining partial physical layer parameters of the interfering UE.

In the prior art, a base station configures (RNTI) information of potentially interfering UEs for a UE to a target UE in advance, and the number of potentially interfering UEs is large. Therefore, the target UE needs to perform blind detection on Downlink Control Information (DCI) for a large amount of network temporary identity RNTI information, which is relatively complicated.

Disclosure of Invention

The application provides a method and a device for transmitting control information, which can reduce the blind detection complexity of first terminal equipment by adding transmission parameter information of second control information in first control information.

In a first aspect, a method for transmitting control information is provided, including: first, a first terminal device (or a chip in the first terminal device) receives first control information from a network device, where the first control information includes transmission parameter information of second control information of a second terminal device; and then, the first terminal equipment determines the physical layer transmission parameters of the second terminal equipment according to the first control information. According to the embodiment of the application, the transmission parameter information of the second control information is newly added to the first control information, so that the blind detection complexity of the first terminal equipment can be reduced, and the method and the device are flexible.

In addition, since the interference cancellation at the codeword level is complex, the interference cancellation at the codeword level can be performed only by obtaining information such as channel coding parameters corresponding to the interfering users. In the prior art, channel coding parameters corresponding to an interfering user cannot be obtained, and only part of physical layer parameters of the interfering user, such as modulation parameters or transmission power parameters, can be obtained, so that the prior art can only achieve interference cancellation at a symbol level. The method for transmitting the control information can determine the physical layer transmission parameters of the second terminal device, that is, besides the information such as the modulation parameters, the time-frequency resource parameters and the precoding parameters, the information such as the channel coding parameters corresponding to the second terminal device can be obtained, so that compared with the prior art that interference elimination at a symbol level can only be achieved, the method for transmitting the control information can achieve interference elimination at a codeword level.

Optionally, the determining, by the first terminal device, the physical layer transmission parameter of the second terminal device according to the first control information includes: the first terminal equipment decodes the second control information according to the first control information; and the first terminal equipment determines the physical layer transmission parameters of the second terminal equipment according to the second control information.

When the first terminal device detects its own control information (i.e., the first control information), the first terminal device may decode the second control information according to the content newly added to the first control information, i.e., the transmission parameter information of the control information (i.e., the second control information) of the second terminal device, and obtain the physical layer transmission parameter of the second terminal device according to the second control information.

Optionally, the time-frequency resource occupied by the second terminal device for downlink transmission is at least partially overlapped with the time-frequency resource occupied by the first terminal device for downlink transmission. Here, there may be interference between the second terminal device and the first terminal device.

Optionally, the method further comprises: the first terminal device receives a first signaling from the network device, wherein the first signaling is used for indicating the first terminal device to enter an interference elimination mode; and the first terminal equipment enters an interference elimination mode according to the first signaling. Here, the entering of the first terminal device into the interference cancellation mode after receiving the first signaling specifically includes: and the first terminal equipment solves the newly added field in the first control information to acquire the transmission parameter information of the second control information.

Optionally, the transmission parameter information of the second control information includes one or more of the following three items of information: the Radio Network Temporary Identifier (RNTI) information of the second terminal equipment, the time-frequency resource information occupied by the second control information and the load size information of the second control information.

In a possible implementation manner, the transmission parameter information of the second control information includes one or two of the three items of information; the method further comprises the following steps: the first terminal device detects information other than one or two items of information included in the transmission parameter information of the second control information among the three items of information. If the transmission parameter information of the second control information includes part of the transmission parameter information of the three items of information, the first terminal device needs to blindly detect the rest of the three items of information.

In one possible implementation manner, the transmission parameter information of the second control information includes all of the three pieces of information. That is, the three items of information described above are included in the first control information. The first terminal equipment can obtain the transmission parameter information of the second control information of the second terminal equipment through the first control information, decodes the second control information based on the transmission parameter information of the second control information, and finally determines the physical layer transmission parameter of the second terminal equipment according to the second control information, so that the physical layer parameter of the second terminal equipment can be obtained, and the interference elimination at the code word level is facilitated. Codeword level interference cancellation is more complex than symbol level interference cancellation. When the first terminal device performs interference cancellation at the codeword level, it needs to obtain a channel coding parameter corresponding to the second terminal device. The physical layer parameters of the second terminal device at least include channel coding parameters, and may also include information such as modulation parameters, time-frequency resource parameters, and precoding parameters.

Optionally, the RNTI information of the second terminal device includes an RNTI index of the second terminal device, and the RNTI index of the second terminal device is used to indicate an RNTI value of the second terminal device; before the first terminal device receives the first control information from the network device, the method further includes: and the first terminal equipment receives configuration information from the network equipment, wherein the configuration information comprises an RNTI value of the second terminal equipment.

Illustratively, the first terminal device receives radio resource control, RRC, signaling from the network device, the RRC signaling including the configuration information; the first terminal equipment receives downlink control information DCI from network equipment, wherein the DCI comprises an RNTI index of the second terminal equipment. Here, the RNTI value of the potentially interfering UE may be configured in a semi-static configuration manner, and then the RNTI index of the second terminal device is dynamically indicated in the DCI, which is beneficial to saving the overhead of the DCI compared with a manner of directly indicating the RNTI value of the second terminal device.

Optionally, the RNTI information of the second terminal device includes an RNTI value of the second terminal device.

Exemplarily, the first terminal device receives downlink control information DCI from a network device, where the DCI includes an RNTI value of the second terminal device. Here, the RNTI value does not need to be configured in a semi-static configuration manner, but is directly dynamically selected through DCI, which is relatively flexible.

Optionally, the method further comprises: the first terminal equipment determines a physical layer transmission parameter of the first terminal equipment according to the first control information; and the first terminal equipment carries out interference elimination based on the physical layer transmission parameters of the first terminal equipment and the physical layer transmission parameters of the second terminal equipment. Therefore, the first terminal device can also determine its own physical layer transmission parameters through the first control information, and then perform interference cancellation based on its own physical layer transmission parameters and the physical layer transmission parameters of the second terminal device.

In a second aspect, a method for transmitting control information is provided, including: first, a network device (or a chip in the network device) determines first control information, where the first control information includes transmission parameter information of second control information of a second terminal device. Then, the network device sends the first control information to the first terminal device. According to the embodiment of the application, the transmission parameter information of the second control information is newly added to the first control information, so that the blind detection complexity of the first terminal equipment can be reduced, and the method and the device are flexible.

Optionally, the network device schedules at least partial overlap between the time-frequency resource occupied by the second terminal device for downlink transmission and the time-frequency resource occupied by the first terminal device for downlink transmission. Here, there may be interference between the second terminal device and the first terminal device.

Optionally, the method further comprises: the network device sends a first signaling to the first terminal device, wherein the first signaling is used for indicating the first terminal device to enter an interference elimination mode. Here, the network device sends the first signaling to the first terminal device, so that the first terminal device solves the newly added field in the first control information to obtain the transmission parameter information of the second control information.

Optionally, the transmission parameter information of the second control information includes one or more of the following three items of information: the Radio Network Temporary Identifier (RNTI) information of the second terminal equipment, the time-frequency resource information occupied by the second control information and the load information of the second control information.

Optionally, the RNTI information of the second terminal device includes an RNTI index of the second terminal device, where the RNTI index of the second terminal device is used to indicate a value of RNTI of the second terminal device; before the network device sends the first control information to the first terminal device, the method further includes: and the network equipment sends configuration information to the first terminal equipment, wherein the configuration information comprises an RNTI value of the second terminal equipment.

Exemplarily, the network device sends the configuration information to the first terminal device through radio resource control RRC signaling; and the network equipment sends downlink control information DCI to the first terminal equipment, wherein the DCI comprises an RNTI index of the second terminal equipment. Here, the network device may configure the RNTI value of the potentially interfering UE through a semi-static configuration manner, and then dynamically indicate the RNTI index of the second terminal device in the DCI, which is beneficial to saving the overhead of the DCI compared with a manner of directly indicating the RNTI value of the second terminal device.

Optionally, the sending, by the network device, the first control information to the first terminal device includes: and the network equipment sends downlink control information DCI to the first terminal equipment, wherein the DCI comprises an RNTI value of the second terminal equipment. Here, the network device does not need to configure the RNTI value in a semi-static configuration manner, but directly dynamically selects the RNTI value through DCI, which is flexible.

In a third aspect, a communication device is provided, which includes various modules or units for performing the method in any one of the possible implementations of the first aspect.

In a fourth aspect, a communications apparatus is provided that includes at least one processor. The at least one processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of any one of the possible implementations of the first aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in the terminal equipment. When the communication device is a chip configured in a terminal device, the communication interface may be an input/output interface.

Alternatively, the transceiver may be a transmit-receive circuit. Alternatively, the input/output interface may be an input/output circuit.

In a fifth aspect, a communication device is provided, which comprises various modules or units for performing the method of any one of the possible implementations of the second aspect.

In a sixth aspect, a communications apparatus is provided that includes at least one processor. The at least one processor is coupled to the memory and is operable to execute the instructions in the memory to implement the method of any one of the possible implementations of the second aspect. Optionally, the communication device further comprises a memory. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface.

In one implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input/output interface.

In another implementation, the communication device is a chip configured in the network device. When the communication device is a chip configured in a network device, the communication interface may be an input/output interface.

In a seventh aspect, a processor is provided, including: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal via the input circuit and transmit a signal via the output circuit, so that the processor performs the method of any one of the possible implementations of the first aspect.

In a specific implementation process, the processor may be a chip, the input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a flip-flop, various logic circuits, and the like. The input signal received by the input circuit may be received and input by, for example and without limitation, a receiver, the signal output by the output circuit may be output to and transmitted by a transmitter, for example and without limitation, and the input circuit and the output circuit may be the same circuit that functions as the input circuit and the output circuit, respectively, at different times. The embodiment of the present application does not limit the specific implementation manner of the processor and various circuits.

In an eighth aspect, a processor is provided, comprising: input circuit, output circuit and processing circuit. The processing circuit is configured to receive a signal through the input circuit and transmit a signal through the output circuit, so that the processor performs the method of any one of the possible implementations of the second aspect.

In a ninth aspect, a processing apparatus is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and to receive signals via the receiver and transmit signals via the transmitter to perform the method of any one of the possible implementations of the first aspect.

Optionally, the number of the processors is one or more, and the number of the memories is one or more.

Alternatively, the memory may be integral to the processor or provided separately from the processor.

In a specific implementation process, the memory may be a non-transitory (non-transitory) memory, such as a Read Only Memory (ROM), which may be integrated on the same chip as the processor, or may be separately disposed on different chips, and the embodiment of the present application does not limit the type of the memory and the arrangement manner of the memory and the processor.

It will be appreciated that the associated data interaction process, for example, receiving information or data, may be the process of inputting the information from the processor, and transmitting information or data may be the process of receiving output capability information for the processor. In particular, data output by the processor may be output to a transmitter and input data received by the processor may be from a receiver. The transmitter and receiver may be collectively referred to as a transceiver, among others.

In a tenth aspect, a processing apparatus is provided that includes a processor and a memory. The processor is configured to read instructions stored in the memory and to receive signals via the receiver and transmit signals via the transmitter to perform the method of any of the possible implementations of the second aspect.

In a specific implementation process, the memory may be a non-transient (non-transient) memory, for example, a read only memory ROM, which may be integrated on the same chip as the processor, or may be separately disposed on different chips.

It will be appreciated that the associated data interaction process, for example, sending information or data, may be the process of outputting the information from the processor, and receiving information or data may be the process of receiving input capability information for the processor. In particular, data output by the processor may be output to a transmitter and input data received by the processor may be from a receiver. The transmitter and receiver may be collectively referred to as a transceiver, among others.

In an eleventh aspect, a chip is provided that includes at least one processor and an interface. The processor is operative to cause the chip to perform the method of any one of the possible implementations of the first aspect or the second aspect.

Alternatively, the processor may be a logic circuit, an integrated circuit, or the like. Optionally, the processor is a dedicated processor.

In a twelfth aspect, a chip is provided that includes at least one processor and an interface. The processor is adapted to run the computer program stored therein so that the chip performs the method of any of the possible implementations of the first aspect or the second aspect.

The chip may further comprise a memory coupled to the processor for storing a computer program, and the processor is configured to execute the computer program stored in the memory, so that the chip performs the method of any of the possible implementations of the first aspect or the second aspect. The couplings are independent or integrated with each other.

Alternatively, the processor may be a logic circuit, an integrated circuit, or the like. Optionally, the processor is a general purpose processor.

In a thirteenth aspect, there is provided a computer program product comprising: computer program (also called code, or instructions), which when executed, causes a computer to perform the method of any of the possible implementations of the first aspect described above.

In a fourteenth aspect, there is provided a computer program product comprising: computer program (also called code, or instructions), which when executed, causes a computer to perform the method of any of the possible implementations of the second aspect described above.

In a fifteenth aspect, a computer-readable (storage) medium is provided, which stores a computer program (which may also be referred to as code, or instructions) that, when executed on a computer, causes the computer to perform the method of any one of the possible implementations of the first aspect.

In a sixteenth aspect, a computer-readable (storage) medium is provided, which stores a computer program (which may also be referred to as code, or instructions) that, when run on a computer, causes the computer to perform the method of any of the possible implementations of the second aspect described above.

In a seventeenth aspect, a communication system is provided, which includes the foregoing network device and terminal device.

Drawings

Fig. 1 is an architectural diagram of a communication system to which embodiments of the present application may be applied;

FIG. 2 is a schematic interaction diagram of a method of transmitting control information according to an embodiment of the application;

fig. 3 is a schematic block diagram of a communication device provided by an embodiment of the present application;

fig. 4 is a schematic structural diagram of a terminal device provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a network device according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

In the embodiments of the present application, "a plurality" may be understood as "at least two" or "two or more"; "plurality" is to be understood as "at least two" or "two or more".

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: long Term Evolution (LTE) systems, fifth generation (5 g) communication systems, new Radio (NR) systems, and future evolution communication systems.

Fig. 1 is a schematic architecture diagram of a communication system to which embodiments of the present application may be applied. As shown in fig. 1, the communication system includes a core network device 110, an access network device 120, and at least one terminal device (e.g., terminal device 130 and terminal device 140 in fig. 1). The terminal equipment is connected with the access network equipment in a wireless mode, and the access network equipment is connected with the core network equipment in a wireless or wired mode. The core network device and the network device may be separate physical devices, or the function of the core network device and the logical function of the access network device may be integrated on the same physical device, or a physical device may be integrated with a part of the function of the core network device and a part of the function of the network device. The terminal equipment may be fixed or mobile. Fig. 1 is a schematic diagram, and other network devices, such as a wireless relay device and a wireless backhaul device, may also be included in the communication system, which are not shown in fig. 1. The embodiments of the present application do not limit the number of core network devices, and terminal devices included in the communication system.

In fig. 1, access network device 120 may schedule multiple terminal devices, such as terminal device 130 and terminal device 140, for downlink transmission at the same time. If the resource scheduled by access network device 120 for downlink transmission by terminal device 130 partially overlaps or completely overlaps with the resource scheduled by terminal device 140 for downlink transmission, there may be interference between terminal device 130 and terminal device 140. Taking terminal device 130 as an example, terminal device 130 may receive a signal sent to terminal device 140 when receiving a signal sent to terminal device 130 from access network device 120. Here, terminal device 130 may be referred to as a target UE and terminal device 140 may be referred to as an interfering UE.

The network device is an access device that the terminal device accesses to the communication system in a wireless manner, and may be a Radio Access Network (RAN) device, a base station NodeB, an evolved NodeB (eNB), a base station (gNB) in the 5G communication system, a transmission point, a base station in a future communication system, an access node in a wireless fidelity (Wi-Fi) system, one or a group of antenna panels (including multiple antenna panels) of the base station in the 5G system, or may also be a network node that forms the gNB or the transmission point, such as a baseband unit (BBU), a centralized unit (central unit, CU), or a distributed unit (distributed unit, DU). The embodiments of the present application do not limit the specific technologies and the specific device forms used by the network devices. In some deployments, the gNB may include CUs and DUs. The gNB may further include an Active Antenna Unit (AAU). The CU implements part of the function of the gNB and the DU implements part of the function of the gNB. For example, the CU is responsible for processing non-real-time protocols and services to implement functions of Radio Resource Control (RRC) layer and Packet Data Convergence Protocol (PDCP) layer. The DU is responsible for processing physical layer protocols and real-time services to implement functions of a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer. The AAU implements part of the physical layer processing functions, radio frequency processing and active antenna related functions. Since the information of the RRC layer eventually becomes or is converted from the information of the PHY layer, the higher layer signaling, such as the RRC layer signaling, may also be considered to be transmitted by the DU or transmitted by the DU and the AAU under this architecture. It is to be understood that the network device may be a device comprising one or more of a CU node, a DU node, an AAU node. In addition, the CU may serve as a network device in an access network, and may also serve as a network device in a Core Network (CN), which is not limited in this application.

The terminal device may also be referred to as a terminal, a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), and so on. The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self-driving (self-driving), a wireless terminal in remote surgery (remote medical supply), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and so on. The embodiment of the present application does not limit the specific technology and the specific device form adopted by the terminal device.

The network equipment and the terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; can also be deployed on the water surface; it may also be deployed on airborne airplanes, balloons, and satellites. The embodiment of the application does not limit the application scenes of the access network equipment and the terminal equipment.

The embodiment of the application can be suitable for downlink signal transmission, can also be suitable for uplink signal transmission, and can also be suitable for device-to-device (D2D) signal transmission. For downlink signal transmission, the sending device is an access network device, and the corresponding receiving device is a terminal device. For uplink signal transmission, the sending device is a terminal device, and the corresponding receiving device is an access network device. For D2D signaling, the sending device is a terminal device, and the corresponding receiving device is also a terminal device.

The network device and the terminal device, and the terminal device may communicate via a licensed spectrum (licensed spectrum), may communicate via an unlicensed spectrum (unlicensed spectrum), and may communicate via both the licensed spectrum and the unlicensed spectrum. The access network device and the terminal device may communicate with each other through a frequency spectrum of 6 gigahertz (GHz) or less, through a frequency spectrum of 6G or more, and through a frequency spectrum of 6G or less and through a frequency spectrum of 6G or more. The embodiment of the application does not limit the frequency spectrum resources used between the access network device and the terminal device.

In the embodiments of the present application, if not specifically stated, the network devices all refer to access network devices. The terminal device or the network device includes a hardware layer, an operating system layer running on top of the hardware layer, and an application layer running on top of the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. Furthermore, the embodiment of the present application does not particularly limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the execution subject can communicate with the method provided by the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, for example, the execution subject of the method provided by the embodiment of the present application may be a terminal device or a network device, or a functional module (for example, a processor, a chip, or a system-on-chip, etc.) capable of calling the program and executing the program in the terminal device or the network device.

In addition, various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable media can include but are not limited to magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g., compact Disk (CD), digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, or key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

The terms or concepts related to the embodiments of the present application are briefly explained herein.

Interference elimination: to address the multi-user interference problem, interference cancellation techniques may be used at the receiving end (or receiver). Interference cancellation can be divided into symbol-level interference cancellation and codeword-level interference cancellation. The receiving end here may be considered as a target terminal device (or target UE). Alternatively, a receiving end using an interference cancellation technique may also be referred to as an advanced receiver or a non-orthogonal multiple-access (NOMA) receiver.

The terminal device generally obtains a physical layer transmission parameter by receiving Downlink Control Information (DCI) sent by the network device, where the physical layer transmission parameter includes information such as a modulation parameter, a channel coding parameter, a time-frequency resource parameter, and a precoding parameter. When the network device sends DCI, the time-frequency resource location occupied by the DCI and the information bit number (load size) included in the DCI are not fixed values, and there may be several selectable values. The parameters corresponding to these selectable value combinations are configured in advance by the network device in a semi-static manner, and generally expressed as a Search Space (SS) parameter and a control-resource set (core) parameter in a protocol. When detecting DCI, a terminal device may attempt to receive multiple possible load sizes on multiple time-frequency resources. If the content decoding of a certain DCI is found to be correct, the terminal device considers that the DCI is correctly received, and the above process is referred to as a DCI blind detection process.

During the transmission of the DCI, the DCI is generally related to a network temporary identifier (RNTI), for example, a Cyclic Redundancy Check (CRC) of the DCI and the RNTI are scrambled, and a scrambling parameter of a bit after the DCI channel is coded may also be related to the RNTI. The location parameter of the search space may also be related to the RNTI. For different usage scenarios, there are many types of RNTIs, such as cell-radio network temporary identifier (C-RNTI), paging-radio network temporary identifier (P-RNTI), system information radio network temporary identifier (SI-RNTI), and the like.

Therefore, the terminal device blindly detects that the DCI is related to the RNTI, that is, the terminal device may determine the position of the search space, determine the scrambling sequence of the bits after the DCI channel coding, and determine the scrambling mode of the CRC bits of the DCI according to the value of the RNTI. Optionally, the terminal device may perform DCI blind detection on a certain RNTI, or the terminal device monitors a certain RNTI.

In general, a terminal device detects a downlink control channel, such as a Physical Downlink Control Channel (PDCCH), in a specific resource range, where the resource may be at least one of a time domain resource, a frequency domain resource, and a code domain resource. The specific resource scope may refer to at least one of a control resource set, CORESET, and a search space. CORESET defines the range of possible resources for a terminal device to detect the frequency domain location of the PDCCH. The network device may configure one or more of an identifier of the core set, a demodulation reference signal (DMRS) scrambling identifier of the PDCCH, a frequency domain precoding granularity, a symbol length, a frequency domain position, a mapping manner between a Control Channel Element (CCE) and a Resource Element Group (REG), a quasi-co-location assumption for receiving the PDCCH, and whether a transmission indication (TCI) configuration field exists in the DCI of the PDCCH received in the core set.

Generally, one CCE is composed of 6 REGs, and a resource of one REG is composed of one Resource Block (RB) in a frequency domain and one symbol in a time domain. Each REG has a mapping relationship with each CCE, and may be directly mapped, for example, 6 consecutive REGs constitute one CCE; or may be interleaving mapping, such as mapping the REGs to CCEs after interleaving.

The resources (sometimes also referred to as physical resources) in the embodiments of the present application may include one or more of time domain resources, frequency domain resources, code domain resources, or spatial domain resources. For example, the time domain resource included in the physical resource may include at least one frame, at least one sub-frame, at least one slot (slot), at least one mini-slot (mini-slot), at least one time unit, or at least one time domain symbol. For example, the frequency domain resources included in the physical resources may include at least one carrier (carrier), at least one Component Carrier (CC), at least one bandwidth part (BWP), at least one Resource Block Group (RBG), at least one physical resource block group (PRG), at least one Resource Block (RB), or at least one subcarrier (sub-carrier, SC), and the like. For example, the spatial domain resources included in the physical resources may include at least one beam, at least one port, at least one antenna port, or at least one layer/spatial layer, etc. For example, the code domain resource included in the physical resource may include at least one Orthogonal Cover Code (OCC), at least one non-orthogonal multiple access (NOMA) code, and the like.

Fig. 2 shows a schematic interaction diagram of a method 200 of transmitting control information according to an embodiment of the application. It is understood that the first terminal device in fig. 2 may be the terminal device in fig. 1 (e.g., the terminal device 130), and may also refer to an apparatus (e.g., a processor, a chip, or a system-on-chip, etc.) in the terminal device; correspondingly, the second terminal device may be the terminal device in fig. 1 (e.g., the terminal device 140), and may also refer to a device (e.g., a processor, a chip, or a system-on-chip, etc.) in the terminal device. The network device may be the access network device 120 in fig. 1, and may also refer to an apparatus (e.g., a processor, a chip, or a system-on-chip) in the network device. It is further understood that, in fig. 2, part or all of the information interacted between the terminal device and the network device may be carried in an existing message, channel, signal, or signaling, or may be a newly defined message, channel, signal, or signaling, which is not limited specifically. As shown in fig. 2, the method 200 includes:

s210, the network device sends first control information to the first terminal device, wherein the first control information comprises transmission parameter information of second control information of the second terminal device. Correspondingly, the first terminal device receives the first control information from the network device.

Here, when the network device sends the first control information to the first terminal device, the network device may include transmission parameter information of second control information of the second terminal device in the first control information, and send the first control information to the first terminal device, so that the first terminal device may determine physical layer transmission parameters of the second terminal device according to the first control information.

Taking the example that the control information is DCI, when the network device sends DCI of the first terminal device to the first terminal device, one or more fields may be newly added in the DCI of the first terminal device. The field includes the DCI transmission parameter information of the second terminal device, which may assist the first terminal device in decoding the DCI of the second terminal device to obtain the physical layer transmission parameter of the second terminal device.

It is to be understood that the second terminal device is taken as an example for description, and the number of the second terminal devices is not limited, that is, the first control information may include transmission parameter information of control information of one or more terminal devices.

The embodiment of the present application does not specifically limit the relationship between the first terminal device and the second terminal device.

S220, the first terminal device determines the physical layer transmission parameter of the second terminal device according to the first control information.

The transmission parameter information of the second control information of the second terminal device included in the first control information may be understood as the transmission parameter information of the DCI of the second terminal device, and is not the physical layer transmission parameter of the second terminal device. For example, the transmission parameter information of the DCI of the second terminal device may include: the Radio Network Temporary Identifier (RNTI) information of the second terminal equipment, the time-frequency resource information occupied by the DCI of the second terminal equipment and the load size information of the DCI of the second terminal equipment.

The first terminal equipment can determine the physical layer transmission parameters of the second terminal equipment based on the DCI transmission parameter information of the second terminal equipment, which is included in the first control information.

Optionally, S220 includes: the first terminal equipment decodes the second control information according to the first control information; and the first terminal equipment determines the physical layer transmission parameters of the second terminal equipment according to the second control information.

Specifically, when the first terminal device detects its own control information (i.e., the first control information), the first terminal device may decode the second control information according to the content newly added to the first control information, i.e., the transmission parameter information of the control information (i.e., the second control information) of the second terminal device, and obtain the physical layer transmission parameter of the second terminal device according to the second control information.

It is to be appreciated that DCI information directed to any potentially interfering UE (e.g., the second terminal device) may be added to the first control information. Therefore, dynamic indication of the interference UE can be realized, and the flexibility of interference elimination is increased.

Compared with the semi-static configuration of the RNTI information of the potentially interfering UE (which can cause the potentially interfering UE to be always considered as interfering UE) in the prior art, the blind detection complexity of the first terminal device can be reduced by newly adding the transmission parameter information of the second control information in the first control information, and the method and the device are flexible. Of course, the first terminal device may also obtain its own physical layer transmission parameter based on the first control information, and the specific process may refer to the existing description.

Optionally, the time-frequency resource occupied by the second terminal device for downlink transmission is at least partially overlapped with the time-frequency resource occupied by the first terminal device for downlink transmission. Specifically, the time-frequency resource occupied by the first terminal device for downlink transmission and the time-frequency resource occupied by the second terminal device for downlink transmission may be partially overlapped or completely overlapped. Because the time-frequency resource occupied by the second terminal device for downlink transmission is at least partially overlapped with the time-frequency resource occupied by the first terminal device for downlink transmission, when the first terminal device receives the signal sent by the network device, the first terminal device may also receive the signal sent by the network device to the second terminal device, thereby causing interference in downlink transmission of the first terminal device for downlink transmission of the second terminal device. Here, the first terminal device may be referred to as a target terminal device, and the second terminal device may be referred to as an interfering terminal device.

Under the condition that the time frequency resources occupied by the second terminal equipment for downlink transmission are at least partially overlapped with the time frequency resources occupied by the first terminal equipment for downlink transmission, the first terminal equipment carries out symbol-level or code-level interference elimination according to the physical layer transmission parameters of the first terminal equipment and the physical layer transmission parameters of the second terminal equipment so as to enhance the communication performance. Since the interference cancellation at the codeword level is relatively complex, the interference cancellation at the codeword level can be performed only by obtaining information such as channel coding parameters corresponding to interfering users. In the prior art, channel coding parameters corresponding to an interfering user cannot be obtained, and only part of physical layer parameters of the interfering user, such as modulation parameters or transmission power parameters, can be obtained, so that the prior art can only achieve interference cancellation at a symbol level. The method for transmitting the control information can determine the physical layer transmission parameters of the second terminal device, that is, besides the information such as the modulation parameters, the time-frequency resource parameters and the precoding parameters, the information such as the channel coding parameters corresponding to the second terminal device can be obtained, so that compared with the prior art that interference elimination at a symbol level can only be achieved, the method for transmitting the control information can achieve interference elimination at a codeword level.

In the embodiment of the present application, the physical layer transmission parameters of the second terminal device at least include channel coding parameters. The physical layer transmission parameters of the second terminal device may also comprise other transmission parameters. Optionally, the physical layer transmission parameter (physical layer transmission parameter of the first terminal device or physical layer transmission parameter of the second terminal device) includes information of a modulation parameter, a channel coding parameter, a time-frequency resource parameter, a precoding parameter, and the like.

In particular, the first terminal device may cancel interference in a number of ways based on physical layer parameters of the interfering user (e.g., the second terminal device). For example, taking the first terminal device as a receiver as an example, the receiver may reconstruct a transmission signal and corresponding channel parameters corresponding to the interfering user according to the physical layer transmission parameters of the interfering user, and thereby obtain a corresponding interfering user signal component in the received signal, and subtract the interfering user signal from the received signal, so as to cancel the interference.

Optionally, the transmission parameter information of the second control information includes one or more of the following three items of information: the Radio Network Temporary Identifier (RNTI) information of the second terminal equipment, (2) time-frequency resource information occupied by the second control information, and (3) load size information of the second control information. Here, the transmission parameter information of the second control information may include all of the three items of information, or may include one or two items of information, which is not particularly limited.

For item (1), the RNTI information of the second terminal device may include an RNTI index (index), or an RNTI value. The type of RNTI is not specifically limited in the embodiments of the present application, for example, the RNTI may include: C-RNTI, P-RNTI, SI-RNTI, etc.

For item (2), the time-frequency resource information occupied by the second control information may include information such as a start position of the time-frequency resource and size information of the time-frequency resource. For example, the time-frequency resource information occupied by the second control information may include an index of a starting CCE, an aggregation level, a relative position of the time-frequency resource occupied by the DCI with respect to the entire CORESET, and a search space (search space) parameter corresponding to the time-frequency resource occupied by the DCI.

For item (3), the load size information of the second control information may include a load size index (payload size index). Since the payload size of DCI generally corresponds to the type or format of DCI, the above-mentioned item (3) may be regarded as format information of the second control information. For example, under NR system, the DCI format may include DCI format 1_0 (DCI format 1_0) or DCI format 1_1 (DCI format 1_1); in the LTE system, the DCI format may include DCI format 1 series (DCI format 1 series) or DCI format 2 series (DCI format 2 series). The DCI format 1 series can be represented as DCI format 1/1A/1B/1C/1D, DCI format 6-1A/6-1B, DCI format 7-1A/7-1B/7-1C/7-1D/7-1E/7-1F/7-1G, and the DCI format 2 series can be represented as DCI format 2/2A/2B/2C/2D, DCI format6-2.

As a possible implementation manner, the transmission parameter information of the second control information includes all of the above three items of information. That is, the three items of information described above are included in the first control information. The first terminal equipment can obtain the transmission parameter information of the second control information of the second terminal equipment through the first control information, decodes the second control information based on the transmission parameter information of the second control information, and finally determines the physical layer transmission parameter of the second terminal equipment according to the second control information, so that the physical layer parameter of the second terminal equipment can be obtained, and the interference elimination at the code word level is facilitated.

As described herein, in this embodiment, when performing interference cancellation at a codeword level, a first terminal device needs to obtain a channel coding parameter corresponding to a second terminal device. The physical layer parameters of the second terminal device comprise at least channel coding parameters. The physical layer parameters of the second terminal device may further include information such as modulation parameters, time-frequency resource parameters, and precoding parameters.

As a possible implementation manner, the transmission parameter information of the second control information includes one or two of the three items of information; the method 200 comprises the following steps: the first terminal device detects information other than one or two items of information included in the transmission parameter information of the second control information among the three items of information.

Specifically, if the transmission parameter information of the second control information includes part of the three pieces of information, the first terminal device needs to blindly detect the rest of the three pieces of information. For example, the transmission parameter information of the second control information includes (1) and (2) of the above three items of information, but does not include (3). For another example, the transmission parameter information of the second control information includes (1) and (3) of the above three items of information, but does not include (2). For another example, the transmission parameter information of the second control information includes (2) and (3) of the above three items of information, but does not include (1). For another example, the transmission parameter information of the second control information includes (1) of the three items of information, but does not include (2) and (3). For another example, the transmission parameter information of the second control information includes (2) of the three items of information, but does not include (1) and (3). For another example, the transmission parameter information of the second control information includes (3) of the above three items of information, but does not include (1) and (2).

The following description will take an example in which the first terminal device is a target UE, the DCI of the target UE of the first control information is, the second terminal device is an interfering UE, and the second control information is DCI of the interfering UE.

For example, if the DCI of the target UE does not include the load size information of the DCI of the interfering UE, the target UE may perform multiple decoding attempts according to a possible value of the DCI load size of the interfering UE. If the decoding is successful, that is, the CRC check passes, then the DCI decoding of the interfering UE is considered to be successful.

For another example, if DCI of the target UE does not include aggregation level information of the interfering UE, the target UE may perform multiple decoding attempts according to possible values of the aggregation level of the interfering UE. If the decoding is successful, that is, the CRC check passes, the DCI decoding of the interfering UE is considered to be successful.

For another example, if DCI of the target UE does not include information of the starting CCE of the interfering UE, the target UE may perform multiple decoding attempts according to possible values of the starting CCE of the interfering UE. If the decoding is successful, that is, the CRC check passes, then the DCI decoding of the interfering UE is considered to be successful.

For another example, if the DCI of the target UE does not include the RNTI index of the interfering UE, the target UE may perform multiple decoding attempts based on the RNTI value of the potential interfering UE. If the decoding is successful, the DCI of the interference UE is considered to be successfully decoded. The value of the RNTI of the potentially interfering UE may be configured by the network device in a semi-static manner (e.g., RRC signaling) to the target UE.

For another example, assume that the DCI of the target UE does not include the RNTI index of the interfering UE, but includes the relative position of the time-frequency resource occupied by the DCI of the interfering UE with respect to the entire CORESET. Because the RNTI value corresponds to the selectable range of the time-frequency resource occupied by the DCI of the UE, the target UE can deduce the possible value or value range of the RNTI of the interference UE based on the relative position of the time-frequency resource occupied by the DCI of the interference UE relative to the whole CORESET and by combining the possible value of the RNTI of the potential interference UE. And the target UE carries out decoding for multiple times according to the possible value or value range of the RNTI of the interference UE, and blindly detects the DCI of the interference UE. If the decoding is successful, the DCI of the interference UE is considered to be successfully decoded.

It is to be understood that the transmission parameter information not included in the transmission parameter information of the second control information may also be obtained in other manners. For example, the transmission parameter information not included in the transmission parameter information of the second control information may be a fixed value or a default, which is not particularly limited. For example, assuming that the transmission parameter information of the second control information does not include RNTI information of the second terminal device, the first terminal device may consider the RNTI information of the second terminal device to be a fixed value or default.

That is, in this implementation, even if the first control information includes one or two of the above-described three items of information, the first terminal device can obtain information other than one or two items of information that the transmission parameter information of the second control information already includes, of the three items of information. The operation of the first terminal device after obtaining the physical layer transmission parameter of the second terminal device may refer to the foregoing description, for example, decoding the second control information, obtaining the physical layer parameter of the second terminal device, and performing interference cancellation at a codeword level, which is not described herein again.

Optionally, the method 200 further comprises: the network equipment sends a first signaling to first terminal equipment, wherein the first signaling is used for indicating the first terminal equipment to enter an interference elimination mode. Correspondingly, the first terminal equipment receives the first signaling and enters an interference elimination mode (or an interference measurement mode) according to the first signaling. Here, the entering of the first terminal device into the interference cancellation mode after receiving the first signaling specifically includes: and the first terminal equipment solves the newly added field in the first control information to acquire the transmission parameter information of the second control information.

Optionally, the RNTI information of the second terminal device includes an RNTI index of the second terminal device, or an RNTI value of the second terminal device. The RNTI value may be used to generate information such as scrambled bits of CRC of the second control information, a scrambled sequence corresponding to the coded bits of the second control information, and a time-frequency position of Search Space.

In this embodiment of the application, for a case that RNTI information of the second terminal device includes an RNTI index of the second terminal device, before the first terminal device receives the first control information from the network device, the method 200 includes: and the first terminal equipment receives configuration information from the network equipment, wherein the configuration information comprises an RNTI value of the second terminal equipment.

Illustratively, the network device sends the configuration information to the first terminal device through RRC signaling. Then, the network device sends first control information, such as DCI, to the first terminal device, where the DCI includes an RNTI index of the second terminal device, so as to indicate an RNTI value of the second terminal device. That is to say, the network device configures an RNTI value of the potentially interfering UE in a semi-static configuration manner, for example, configures an RNTI value of the second terminal device for the first terminal device, and then dynamically selects an RNTI index of the second terminal device through the first control information, so that the first terminal device obtains the corresponding RNTI value of the second terminal device through the RNTI index of the second terminal device. Here, since there may be a plurality of potentially interfering UEs, the network device may configure a plurality of RNTI values, and therefore, the RNTI index of the second terminal device needs to be indicated to the first terminal device through DCI. In this way, the network device may dynamically indicate the RNTI index of the second terminal device in the DCI, which is beneficial to saving the overhead of the DCI compared with a mode of directly indicating the RNTI value of the second terminal device.

The potentially interfering UE refers to a UE that may cause interference to the target UE at a certain time. The network device may determine the potentially interfering UE in various ways, for example, the potentially interfering UE may be determined by history information, or all remaining UEs in the connected state may be considered as potentially interfering UEs.

Optionally, when the network device semi-statically configures the RNTI value of the potentially interfering UE, other relevant transmission parameters (for example, a part of parameters required by the network device when transmitting DCI of the interfering UE) may also be configured. For example, the network device may configure the core Space and/or Search Space parameters of DCI that potentially interferes with the UE. The CORESET and/or Search Space parameter may be used to determine time-frequency location information of a control resource set where a time-frequency resource occupied by DCI is located, and information such as an interleaving manner.

For the condition that the RNTI information of the second terminal equipment comprises the RNTI value of the second terminal equipment, the network equipment transmits DCI to the first terminal equipment, wherein the DCI comprises the RNTI value of the second terminal equipment. Here, the network device does not need to configure the RNTI value in a semi-static configuration manner, but directly dynamically selects the RNTI value through DCI, which is flexible.

It is understood that some optional features in the embodiments of the present application may be implemented independently without depending on other features in some scenarios, such as a currently-based solution, to solve corresponding technical problems and achieve corresponding effects, or may be combined with other features according to requirements in some scenarios. Accordingly, the apparatuses provided in the embodiments of the present application may also implement these features or functions, which are not described herein again.

It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments are not necessarily referring to the same embodiment throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

It should also be understood that the various aspects of the embodiments of the present application can be combined and used reasonably, and the explanation or illustration of the various terms appearing in the embodiments can be mutually referred to or explained in the various embodiments, which is not limited.

It should also be understood that, in the various embodiments of the present application, the size of the serial number of each process described above does not mean the execution sequence, and the execution sequence of each process should be determined by the function and the inherent logic of each process. The various numbers or serial numbers involved in the above processes are merely used for convenience of description and should not be construed as limiting the implementation processes of the embodiments of the present application in any way.

Corresponding to the method provided by the above method embodiment, the embodiment of the present application further provides a corresponding apparatus, where the apparatus includes a module for executing the above embodiment. The module may be software, hardware, or a combination of software and hardware. It is understood that the technical features described in the method embodiments are equally applicable to the following apparatus embodiments.

Fig. 3 is a schematic block diagram of a communication device provided in an embodiment of the present application. As shown in fig. 3, the communication device 1000 may include a transceiving unit 1100 and a processing unit 1200.

In one possible design, the communication apparatus 1000 may correspond to the terminal device in the above method embodiment, and may be, for example, the terminal device or a chip configured in the terminal device.

Specifically, the communication apparatus 1000 may correspond to the first terminal device in the method 200 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the first terminal device in the method 200 in fig. 2. Also, each unit in the communication apparatus 1000 and the other operations or functions described above are respectively for implementing the corresponding flow of the first terminal device in the method 200 in fig. 2.

In one possible implementation manner, the transceiving unit 1100 and the processing unit 1200 may be respectively configured to:

the transceiver unit 1100 is configured to receive first control information from a network device, where the first control information includes transmission parameter information of second control information of a second terminal device.

The processing unit 1200 is configured to determine a physical layer transmission parameter of the second terminal device according to the first control information.

Optionally, the processing unit 1200 is configured to determine, according to the first control information, a physical layer transmission parameter of the second terminal device, and includes: decoding the second control information according to the first control information; and determining the physical layer transmission parameters of the second terminal equipment according to the second control information.

Optionally, the time-frequency resource occupied by the second terminal device for downlink transmission at least partially overlaps with the time-frequency resource occupied by the apparatus 1000 for downlink transmission.

Optionally, the transceiver unit 1100 is further configured to receive a first signaling from the network device, where the first signaling is used to instruct the first terminal device to enter an interference cancellation mode; the processing unit 1200 is further configured to enter an interference cancellation mode according to the first signaling.

Optionally, the transmission parameter information of the second control information includes one or more of the following three items of information: the Radio Network Temporary Identifier (RNTI) information of the second terminal equipment, (2) the time-frequency resource information occupied by the second control information, and (3) the load size information of the second control information.

Optionally, the transmission parameter information of the second control information includes one or two of the three items of information; the method further comprises the following steps: the processing unit 1200 is further configured to detect information excluding one or two items of information included in the transmission parameter information of the second control information in the three items of information.

Optionally, the transmission parameter information of the second control information includes all of the three pieces of information.

Optionally, the RNTI information of the second terminal device includes an RNTI index of the second terminal device, and the RNTI index of the second terminal device is used to indicate an RNTI value of the second terminal device; the transceiver unit 1100 is further configured to receive configuration information from the network device, where the configuration information includes an RNTI value of the second terminal device.

Optionally, the transceiver unit 1100 is configured to receive configuration information from the network device, and includes: receiving radio resource control, RRC, signaling from the network device, the RRC signaling including the configuration information; the transceiver unit 1100 is configured to receive first control information from a network device, and includes: and receiving Downlink Control Information (DCI) from the network equipment, wherein the DCI comprises an RNTI index of the second terminal equipment.

Optionally, the transceiver unit 1100 is configured to receive first control information from a network device, and includes: and receiving Downlink Control Information (DCI) from the network equipment, wherein the DCI comprises an RNTI value of the second terminal equipment.

It should be understood that, the specific processes of the units for executing the corresponding steps are already described in detail in the above method embodiments, and are not described herein again for brevity.

It is further understood that when the communication apparatus 1000 is a terminal device, the transceiver unit 1100 in the communication apparatus 1000 may correspond to the transceiver 2020 in the terminal device 2000 shown in fig. 4, and the processing unit 1200 in the communication apparatus 1000 may correspond to the processor 2010 in the terminal device 2000 shown in fig. 4.

It should also be understood that when the communication device 1000 is a chip configured in a terminal device, the transceiver unit 1200 in the communication device 1000 may be an input/output interface circuit.

Optionally, the communication device 1000 further includes a storage unit, and the storage unit may be configured to store instructions or data, and the processing unit may call the instructions or data stored in the storage unit to implement corresponding operations. The storage unit may be implemented by at least one memory, which may for example correspond to the memory 2030 in the terminal device 2000 in fig. 4.

In one possible design, the communication apparatus 1000 may correspond to the network device in the above method embodiment, and may be, for example, a network device or a chip configured in a network device.

Specifically, the communication apparatus 1000 may correspond to the network device in the method 200 according to the embodiment of the present application, and the communication apparatus 1000 may include a unit for executing the method executed by the network device in the method 200 in fig. 2. Also, each unit in the communication apparatus 1000 and the other operations or functions described above are respectively for realizing the corresponding flow of the network device in the method 200 in fig. 2.

In one possible implementation manner, the transceiver unit 1100 and the processing unit 1200 may be respectively configured to:

the processing unit 1200 is configured to determine first control information, where the first control information includes transmission parameter information of second control information of a second terminal device.

The transceiver unit 1100 is configured to send the first control information to a first terminal device.

Optionally, the network device schedules at least partial overlap between the time-frequency resource occupied by the second terminal device for downlink transmission and the time-frequency resource occupied by the first terminal device for downlink transmission.

Optionally, the transceiver unit 1100 is further configured to send a first signaling to the first terminal device, where the first signaling is used to instruct the first terminal device to enter an interference cancellation mode.

Optionally, the transmission parameter information of the second control information includes one or more of the following three items of information: the Radio Network Temporary Identifier (RNTI) information of the second terminal equipment, (2) the time-frequency resource information occupied by the second control information, and (3) the load information of the second control information.

Optionally, the RNTI information of the second terminal device includes an RNTI index of the second terminal device, where the RNTI index of the second terminal device is used to indicate a value of RNTI of the second terminal device; the transceiver unit 1100 is further configured to send configuration information to the first terminal device, where the configuration information includes an RNTI value of the second terminal device.

Optionally, the transceiver unit 1100 is configured to send configuration information to the first terminal device, and includes: sending configuration information to the first terminal equipment through Radio Resource Control (RRC) signaling;

the transceiver 1100 is configured to send the first control information to a first terminal device, and includes: and sending Downlink Control Information (DCI) to the first terminal equipment, wherein the DCI comprises an RNTI index of the second terminal equipment.

Optionally, the transceiver unit 1100 is configured to send the first control information to a first terminal device, and includes: and sending downlink control information DCI to the first terminal equipment, wherein the DCI comprises an RNTI value of the second terminal equipment.

It should be understood that the specific processes of the units for executing the corresponding steps are already described in detail in the above method embodiments, and therefore, for brevity, detailed descriptions thereof are omitted.

It should be understood that when the communication device 1000 is a base station, the transceiver unit 1100 in the communication device 1000 may correspond to the radio frequency unit 3012 and the antenna 3011 in the base station 3000 shown in fig. 5, and the processing unit 1100 in the communication device 1000 may be implemented by at least one processor, for example, may correspond to the processor 3022 in the base station 3000 shown in fig. 5.

It should also be understood that when the communication device 1000 is a chip configured in a network device, the transceiver unit 1200 in the communication device 1000 may be an input/output interface.

Optionally, the communication device 1000 further includes a storage unit, and the storage unit may be configured to store instructions or data, and the processing unit may call the instructions or data stored in the storage unit to implement corresponding operations. The storage unit may be implemented by at least one memory, which may correspond to the memory 3021 in the base station 3000 in fig. 5, for example.

Fig. 4 is a schematic structural diagram of a terminal device 2000 according to an embodiment of the present application. The terminal device 2000 can be applied to the system shown in fig. 1, and performs the functions of the terminal device (the first terminal device or the second terminal device) in the above method embodiment. As shown in fig. 4, the terminal device 2000 includes a processor 2010 and a transceiver 2020. Optionally, the terminal device 2000 further comprises a memory 2030. The processor 2010, the transceiver 2002 and the memory 2030 are in communication with each other through an internal connection path to transmit control or data signals, the memory 2030 is used for storing a computer program, and the processor 2010 is used for calling the computer program from the memory 2030 and executing the computer program to control the transceiver 2020 to transmit and receive signals. Optionally, the terminal device 2000 may further include an antenna 2040, configured to transmit uplink data or uplink control signaling output by the transceiver 2020 by using a wireless signal.

The processor 2010 and the memory 2030 may be combined into a processing device, and the processor 2010 is configured to execute the program codes stored in the memory 2030 to achieve the above functions. In particular, the memory 2030 may be integrated with the processor 2010 or may be separate from the processor 2010. The processor 2010 may correspond to the processing unit in fig. 3.

The transceiver 2020 may correspond to the communication unit in fig. 3, and may also be referred to as a transceiver unit. The transceiver 2020 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). Wherein the receiver is used for receiving signals, and the transmitter is used for transmitting signals.

It should be understood that the terminal device 2000 shown in fig. 4 is capable of implementing various processes involving the terminal device (first terminal device) in the method embodiment shown in fig. 2. The operations or functions of the modules in the terminal device 2000 are respectively to implement the corresponding flows in the above-described method embodiments. Reference may be made specifically to the description of the above method embodiments, and a detailed description is omitted here where appropriate to avoid repetition.

The processor 2010 may be configured to perform the actions described in the preceding method embodiments that are implemented within the terminal device, and the transceiver 2020 may be configured to perform the actions described in the preceding method embodiments that the terminal device transmits to or receives from the network device. Please refer to the description of the previous embodiment of the method, which is not repeated herein.

Optionally, the terminal device 2000 may further include a power supply 2050 for supplying power to various devices or circuits in the terminal device.

In addition, in order to further improve the functions of the terminal device, the terminal device 2000 may further include one or more of an input unit 2060, a display unit 2070, an audio circuit 2080, a camera 2090, a sensor 2100, and the like, and the audio circuit may further include a speaker 2082, a microphone 2084, and the like.

Fig. 5 is a schematic structural diagram of a network device according to an embodiment of the present application, for example, a schematic structural diagram of a base station 3000. The base station 3000 can be applied to the system shown in fig. 1, and performs the functions of the network device in the above method embodiment. As shown, the base station 3000 may include one or more DUs 3010 and one or more CUs 3020. The CU 3020 may communicate with a NG core (next generation core network, NC). The DU 3010 may include at least one antenna 3011, at least one radio unit 3012, at least one processor 3013, and at least one memory 3014. The DU 3010 is mainly used for transceiving radio frequency signals, converting radio frequency signals to baseband signals, and performing partial baseband processing. The CU 3020 may include at least one processor 3022 and at least one memory 3021. The CU 3020 and the DU 3010 may communicate with each other through an interface, where a Control Plane (CP) interface may be Fs-C, such as F1-C, and a User Plane (UP) interface may be Fs-U, such as F1-U.

The CU 3020 is mainly used for performing baseband processing, controlling a base station, and the like. The DU 3010 and the CU 3020 may be physically located together or physically located separately, that is, distributed base stations. The CU 3020 is a control center of the base station, and may also be referred to as a processing unit, and is mainly configured to perform a baseband processing function. For example, the CU 3020 may be configured to control the base station to perform the operation procedure related to the access network device in the above method embodiment.

Specifically, the baseband processing on the CU and the DU may be divided according to the protocol layers of the radio network, for example, the functions of the PDCP layer and the above protocol layers are set in the CU, and the functions of the protocol layers below the PDCP layer, for example, the functions of the RLC layer and the MAC layer, are set in the DU. For another example, a CU realizes functions of an RRC layer and a PDCP layer, and a DU realizes functions of an RLC layer, an MAC layer, and a PHY layer.

Further, base station 3000 may optionally include one or more radio frequency units (RUs), one or more DUs, and one or more CUs. Wherein the DU may include at least one processor 3013 and at least one memory 3014, the ru may include at least one antenna 3011 and at least one radio frequency unit 3012, and the cu may include at least one processor 3022 and at least one memory 3021.

In an example, the CU 3020 may be formed by one or more single boards, where the multiple single boards may support a radio access network with a single access indication (e.g., a 5G network) or support radio access networks with different access schemes (e.g., an LTE network, a 5G network, or other networks) respectively. The memory 3021 and the processor 3022 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits. The DU 3010 may be formed by one or more boards, where the boards may jointly support a radio access network with a single access instruction (e.g., a 5G network), and may also respectively support radio access networks with different access schemes (e.g., an LTE network, a 5G network, or other networks). The memory 3014 and the processor 3013 may serve one or more boards. That is, the memory and processor may be provided separately on each board. Multiple boards may share the same memory and processor. In addition, each single board can be provided with necessary circuits.

It should be appreciated that the base station 3000 shown in fig. 5 is capable of implementing various processes involving network devices in the method embodiment shown in fig. 2. The operations and/or functions of the respective modules in the base station 3000 are respectively for implementing the corresponding flows in the above-described method embodiments. Reference may be made specifically to the description of the above method embodiments, and a detailed description is appropriately omitted herein to avoid redundancy.

It should be understood that the base station 3000 shown in fig. 5 is only one possible architecture of a network device, and should not constitute any limitation to the present application. The method provided by the application can be applied to access network equipment with other architectures. E.g. access network equipment including CUs, DUs and AAUs etc. The present application is not limited to the specific architecture of the network device.

According to the method provided by the embodiment of the present application, the present application further provides a computer program product, which includes: computer program code which, when run on a computer, causes the computer to carry out the method on the terminal device side (first terminal device) in the embodiment shown in fig. 2.

According to the method provided by the embodiment of the present application, the present application further provides a computer-readable medium, which stores program codes, and when the program codes are run on a computer, the computer is caused to execute the method on the network device side in the embodiment shown in fig. 2.

The embodiment of the application also provides a processing device, which comprises a processor and an interface; the processor is configured to perform the method for transmitting control information in any of the above method embodiments.

The terminal device (first terminal device or second terminal device) and the network device in the communication apparatus and method embodiments in the above-mentioned respective apparatus embodiments completely correspond to each other, and the corresponding module or unit executes the corresponding steps, for example, the communication unit (transceiver) executes the steps of receiving or transmitting in the method embodiments, and other steps except for transmitting and receiving may be executed by the processing unit (processor). The functions of the specific elements may be referred to in the respective method embodiments. The number of the processors may be one or more.

Those skilled in the art will also appreciate that the various illustrative logical blocks and steps (step) set forth in the embodiments of the present application may be implemented in electronic hardware, computer software, or combinations of both. Whether such functionality is implemented as hardware or software depends upon the particular application and design requirements of the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the embodiments of the present application.

It should be understood that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a Digital Signal Processor (DSP), a Microcontroller (MCU), a programmable logic controller (PLD), or other integrated chip. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

The techniques described herein may be implemented by various means. For example, these techniques may be implemented in hardware, software, or a combination of hardware and software. For a hardware implementation, the processing units used to perform these techniques at a communication device (e.g., a base station, terminal, network entity, or chip) may be implemented in one or more general-purpose processors, DSPs, digital signal processing devices, ASICs, programmable logic devices, FPGAs, or other programmable logic devices, discrete gate or transistor logic, discrete hardware components, or any combinations of the above. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other similar configuration.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, 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 loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

It should be appreciated that reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the various embodiments are not necessarily referring to the same embodiment throughout the specification. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

It should also be understood that in the present application, "when …", "if" and "if" all refer to the UE or base station doing the corresponding processing under certain objective conditions, and are not limited time, and do not require the UE or base station to perform certain judgment actions, nor do they imply other limitations.

Those of ordinary skill in the art will understand that: the various numbers of the first, second, etc. mentioned in this application are only used for the convenience of description and are not used to limit the scope of the embodiments of this application, but also to indicate the sequence.

Reference in the present application to an element using the singular is intended to mean "one or more" rather than "one and only one" unless specifically stated otherwise. In the present application, unless otherwise specified, "at least one" is intended to mean "one or more" and "a plurality" is intended to mean "two or more".

Additionally, the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A can be singular or plural, and B can be singular or plural.

The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The term "at least one of … …" or "at least one of … …" herein means all or any combination of the listed items, e.g., "at least one of A, B and C", may mean: a alone, B alone, C alone, A and B together, B and C together, and A, B and C together, where A may be singular or plural, B may be singular or plural, and C may be singular or plural.

It should be understood that in the embodiments of the present application, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.

The configuration in the embodiment of the present application may be understood as being notified through RRC signaling, MAC signaling, and physical layer information, where the physical layer information may be transmitted through a PDCCH or a PDSCH.

It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of transmitting control information, comprising:

the method comprises the steps that first terminal equipment receives first control information from network equipment, wherein the first control information comprises transmission parameter information of second control information of second terminal equipment;

and the first terminal equipment determines physical layer transmission parameters of the second terminal equipment according to the first control information, wherein the physical layer transmission parameters comprise channel coding parameters, and the channel coding parameters are used for eliminating interference at a code word level.

2. The method according to claim 1, wherein the determining, by the first terminal device, the physical layer transmission parameter of the second terminal device according to the first control information comprises:

the first terminal equipment decodes the second control information according to the first control information;

and the first terminal equipment determines the physical layer transmission parameters of the second terminal equipment according to the second control information.

3. The method according to claim 1 or 2, wherein the time-frequency resources occupied by the second terminal device for downlink transmission at least partially overlap with the time-frequency resources occupied by the first terminal device for downlink transmission.

4. The method according to any one of claims 1 or 2, wherein the transmission parameter information of the second control information comprises one or more of the following three items of information: the Radio Network Temporary Identifier (RNTI) information of the second terminal equipment, the time-frequency resource information occupied by the second control information and the load size information of the second control information.

5. The method according to claim 4, wherein the transmission parameter information of the second control information comprises one or two of the three items of information; the method further comprises the following steps:

the first terminal device detects information other than one or two items of information included in the transmission parameter information of the second control information among the three items of information.

6. The method according to claim 4, wherein the RNTI information of the second terminal device comprises an RNTI index of the second terminal device, and the RNTI index of the second terminal device is used for indicating an RNTI value of the second terminal device;

before the first terminal device receives the first control information from the network device, the method further includes:

and the first terminal equipment receives configuration information from the network equipment, wherein the configuration information comprises an RNTI value of the second terminal equipment.

7. The method of claim 6, wherein the first terminal device receives configuration information from the network device, comprising:

the first terminal device receiving radio resource control, RRC, signaling from the network device, the RRC signaling including the configuration information;

the receiving, by the first terminal device, first control information from a network device includes:

the first terminal equipment receives downlink control information DCI from network equipment, wherein the DCI comprises an RNTI index of the second terminal equipment.

8. The method of claim 4, wherein the RNTI information of the second terminal device comprises an RNTI value of the second terminal device.

9. The method of claim 8, wherein the first terminal device receives the first control information from the network device, and wherein the method comprises:

the first terminal equipment receives downlink control information DCI from network equipment, wherein the DCI comprises an RNTI value of the second terminal equipment.

10. A method of transmitting control information, comprising:

the method comprises the steps that network equipment determines first control information, wherein the first control information comprises transmission parameter information of second control information of second terminal equipment, and the first control information is used for determining channel coding parameters of the second terminal equipment;

and the network equipment sends the first control information to the first terminal equipment.

11. The method according to claim 10, wherein the time-frequency resources occupied by the network device for scheduling downlink transmission for the second terminal device at least partially overlap with the time-frequency resources occupied by the first terminal device for downlink transmission.

12. The method according to claim 10 or 11, wherein the transmission parameter information of the second control information comprises one or more of the following three items of information: radio Network Temporary Identifier (RNTI) information of the second terminal equipment, time-frequency resource information occupied by the second control information, and load information of the second control information.

13. The method according to claim 12, wherein the RNTI information of the second terminal device comprises an RNTI index of the second terminal device, and the RNTI index of the second terminal device is used for indicating a value of RNTI of the second terminal device;

before the network device sends the first control information to the first terminal device, the method further includes:

and the network equipment sends configuration information to the first terminal equipment, wherein the configuration information comprises an RNTI value of the second terminal equipment.

14. The method of claim 13, wherein the network device sends configuration information to the first terminal device, comprising:

the network equipment sends configuration information to the first terminal equipment through Radio Resource Control (RRC) signaling;

wherein, the network device sends the first control information to a first terminal device, including:

and the network equipment sends downlink control information DCI to the first terminal equipment, wherein the DCI comprises an RNTI index of the second terminal equipment.

15. The method of claim 13, wherein the network device sends the first control information to the first terminal device, and wherein the sending the first control information comprises:

and the network equipment sends downlink control information DCI to the first terminal equipment, wherein the DCI comprises an RNTI value of the second terminal equipment.

16. A communications apparatus, comprising: a processor coupled with a memory for storing a program or instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1-9 or cause the apparatus to perform the method of any of claims 10-15.

17. A computer-readable storage medium having stored thereon a computer program or instructions, which when executed cause a computer to perform the method of any one of claims 1 to 9 or cause a computer to perform the method of any one of claims 10 to 15.