Communication method, and apparatus

Abstract

A communication method, and an apparatus, which allow a network device to distinguish CSI on different frequency domain resources, so as to allocate the frequency domain resources reasonably. The method comprises: receiving first information, the first information being used for indicating that a mode of sending CSI is a sub-band CSI reporting mode; and then sending at least two pieces of CSI, the at least two pieces of CSI being determined on the basis of at least two sub-bands, the at least two pieces of CSI corresponding to the at least two sub-bands on a one-to-one basis, the at least two sub-bands being determined on the basis of a first frequency domain resource and a second frequency domain resource, the first frequency domain resource being a flexible frequency domain resource, and the second frequency domain resource being a downlink frequency domain resource. Thus, in the sub-band CSI reporting mode, the present application can determine the at least two sub-bands on the basis of the first frequency domain resource and the second frequency domain resource, so as to determine the at least two pieces of CSI, such that the CSI reported for the sub-bands corresponds to specific resources, and the reported CSI is more accurate, thereby allowing the network device to distinguish CSI on different frequency domain resources, and allowing the network device to reasonably allocate the frequency domain resources.

Description

Communication method and apparatus

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese Patent Application No. 202410658438.2, filed on May 24, 2024, and entitled “A Communication Method and Apparatus”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of communication technology, and in particular to a communication method and apparatus. BACKGROUND

[0004] In a time division duplexing (TDD) system, downlink (DL) usually occupies the main time resource, which causes the coverage imbalance between DL and uplink (UL), resulting in poor uplink coverage and large delay in the TDD system. To solve the problems of uplink coverage and delay in the TDD system, a subband full duplex (SBFD) scheme and an in band full duplex (IBFD) scheme are proposed.

[0005] In the SBFD scheme, one carrier can be divided into multiple subbands, and the transmission directions of different subbands can be different. Under the SBFD scheme, the available uplink transmission resources of a terminal device are increased, which can effectively improve the uplink coverage and reduce the uplink delay. The SBFD can include two modes: subband overlapping full duplex and subband non-overlapping full duplex. For the subband non-overlapping full duplex, the subband configurations of the whole network are the same; for the subband overlapping full duplex, the subband configurations of the whole network can be different.

[0006] The IBFD can simultaneously perform uplink transmission and downlink transmission on the same time-frequency resource. Compared with TDD and SBFD, IBFD has more uplink resources and downlink resources to improve the uplink performance and downlink performance, and can also effectively reduce the delay.

[0007] Compared with TDD, SBFD and IBFD introduce additional cross link interference (CLI), including CLI between network devices, and the like. In order to reduce interference, the network device adopts a CLI suppression technique on the overlapping frequency domain resource in the sub-band overlapping full duplex scheme (i.e., the frequency domain resource corresponding to the sub-band configured with different transmission directions of the same frequency domain resource) or the full duplex frequency domain resource in the IBFD scheme, to suppress the interference of the downlink signal on the adjacent network device. For example, reducing the transmit power spectral density (PSD) on the overlapping frequency domain resource or the full duplex frequency domain resource, and the like. The above interference suppression method causes the PSD on the overlapping frequency domain resource or the full duplex frequency domain resource to be very different from that on other downlink frequency domain resources, further causing the channel state information (CSI) between the network device and the terminal device to be very different. However, at present, in the IBFD and the sub-band overlapping full duplex scenario of SBFD, the network device can not be able to distinguish the CSI on different frequency domain resources, and thus the network device can not be able to reasonably allocate the frequency domain resources. SUMMARY

[0008] Embodiments of the present application provide a communication method and device, to enable the network device to distinguish the CSI on different frequency domain resources, and thus to reasonably allocate the frequency domain resources.

[0009] In a first aspect, the present application provides a communication method, which can be applied to a communication device. The communication device can be a terminal device, or can be a component (such as a processor, a chip, a chip system, a circuit, or a functional module, etc.) in the terminal device. The method can include: receiving first information, the first information being used to indicate that the sending CSI mode is a sub-band CSI reporting mode; and then sending at least two CSIs; wherein the at least two CSIs are determined according to at least two sub-bands, the at least two CSIs correspond to the at least two sub-bands one by one, and the at least two sub-bands are determined according to the first frequency domain resource and the second frequency domain resource; the first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource.

[0010] Based on the above communication method, in the sub-band CSI reporting mode, by determining the at least two CSIs according to the at least two sub-bands determined according to the first frequency domain resource and the second frequency domain resource, the CSI reported on the sub-band can be reported on a clear resource, the reported CSI is more accurate, the network device can distinguish the CSI on different frequency domain resources, and the network device can reasonably allocate the frequency domain resources.

[0011] In a possible design, the multiple subbands are determined according to the first frequency domain resource and the second frequency domain resource, and the multiple subbands include the at least two subbands. The multiple subbands can satisfy one or more of the following conditions: each subband is continuous in the frequency domain; each two subbands do not overlap in the frequency domain; each subband only overlaps with the first frequency domain resource or only overlaps with the second frequency domain resource; a union of the multiple subbands in the frequency domain is equal to a bandwidth part (BWP); each subband includes a maximum of N frequency domain units, where N is a positive integer; or, two adjacent subbands that include a number of frequency domain units less than N do not overlap with the first frequency domain resource at the same time or do not overlap with the second frequency domain resource at the same time. By satisfying the above conditions for the subbands, the CSI reported for the subbands can be explicitly reported on the resources, and the reported CSI is more accurate.

[0012] In a possible design, the multiple subbands are determined according to the first frequency domain resource and the second frequency domain resource. The method can include the following steps: determining multiple frequency unit groups, where each frequency unit group includes N frequency units, and the multiple frequency unit groups are continuous in the frequency domain, where N is a positive integer; determining at least one subband for each frequency unit group that overlaps with the first frequency domain resource, and / or determining at least one subband for each frequency unit group that overlaps with the second frequency domain resource, to obtain the multiple subbands. In this way, the multiple subbands can be accurately determined according to the first frequency domain resource and the second frequency domain resource.

[0013] In a possible design, the multiple subbands are determined according to the first frequency domain resource and the second frequency domain resource. The method can include the following steps: for the first frequency domain resource and the second frequency domain resource, respectively performing the following operations to obtain the multiple subbands: determining a size of a first subband according to an index of a starting frequency unit of a target frequency domain resource, a number of frequency units included in the target frequency domain resource, and N, where N is a positive integer; determining a size of each subband other than the first subband and a last subband as N; and determining a size of the last subband according to the index of the starting frequency unit of the target frequency domain resource, the number of frequency units included in the target frequency domain resource, and the size of the first subband and the size of the other subbands, where the target frequency domain resource is the first frequency domain resource or the second frequency domain resource. In this way, the multiple subbands can be accurately determined according to the first frequency domain resource and the second frequency domain resource.

[0014] In a possible design, second information is received, where the second information is used to indicate the first frequency domain resource and / or the second frequency domain resource. In this way, the network device can allocate the first frequency domain resource and / or the second frequency domain resource, so that the terminal device determines the multiple subbands.

[0015] In a possible design, the first information is further used to indicate a number of subbands, and the number of subbands is 20, 21, or 22. In this way, more subbands can be indicated.

[0016] In a possible design, the first information is further used to indicate a set of subbands, and the at least two subbands are included in the set of subbands. In this way, the terminal device can report CSI for subbands, so that the terminal device can accurately report corresponding CSI.

[0017] In a possible design, the CSI includes a precoding matrix indication (PMI) and / or a channel quality indicator (CQI).

[0018] In a second aspect, the present application provides a communication method, which can be applied to a communication apparatus. The communication apparatus can be a network device, or can be a component (for example, a processor, a chip, a chip system, a circuit, or a functional module) in the network device. The method can include: sending first information, the first information being used to indicate that a CSI sending manner is a subband CSI reporting manner; and receiving at least two CSIs. The at least two CSIs are determined according to at least two subbands, the at least two CSIs correspond to the at least two subbands in a one-to-one manner, and the at least two subbands are determined according to a first frequency domain resource and a second frequency domain resource. The first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource.

[0019] Based on the above communication method, in the subband CSI reporting manner, the at least two CSIs are determined according to the first frequency domain resource and the second frequency domain resource to determine the at least two subbands, so that the CSI reported for the subbands can be explicitly reported, the reported CSI is more accurate, and the network device can distinguish the CSI on different frequency domain resources, so that the network device can reasonably allocate frequency domain resources.

[0020] In a possible design, the multiple subbands are determined according to the first frequency domain resource and the second frequency domain resource, and the multiple subbands include the at least two subbands. The multiple subbands can satisfy one or more of the following conditions: each subband is continuous in the frequency domain; each two subbands do not overlap in the frequency domain; each subband only overlaps with the first frequency domain resource or only overlaps with the second frequency domain resource; a union of the multiple subbands in the frequency domain is equal to a bandwidth part (BWP); each subband includes a maximum of N frequency domain units, where N is a positive integer; or, adjacent two subbands that include a number of frequency domain units less than N do not overlap with the first frequency domain resource at the same time or do not overlap with the second frequency domain resource at the same time. By satisfying the above conditions for the subbands, the CSI reported for the subbands can be explicitly reported on the resources, and the reported CSI is more accurate.

[0021] In a possible design, the multiple subbands are determined according to the first frequency domain resource and the second frequency domain resource. The method can include: determining multiple frequency unit groups, where one frequency unit group includes N frequency units, and the multiple frequency unit groups are continuous in the frequency domain, where N is a positive integer; determining at least one subband for a frequency unit in each frequency unit group that overlaps with the first frequency domain resource, and / or determining at least one subband for a frequency unit in each frequency unit group that overlaps with the second frequency domain resource, to obtain the multiple subbands. In this way, the multiple subbands can be accurately determined according to the first frequency domain resource and the second frequency domain resource.

[0022] In a possible design, the multiple subbands are determined according to the first frequency domain resource and the second frequency domain resource. The method can include: performing the following operations for the first frequency domain resource and the second frequency domain resource, respectively, to obtain the multiple subbands: determining a size of a first subband according to an index of a starting frequency unit of a target frequency domain resource, a number of frequency units included in the target frequency domain resource, and N, where N is a positive integer; determining a size of each subband other than the first subband and a last subband as N; and determining a size of the last subband according to the index of the starting frequency unit of the target frequency domain resource, the number of frequency units included in the target frequency domain resource, and the size of the first subband and the size of the other subbands, where the target frequency domain resource is the first frequency domain resource or the second frequency domain resource. In this way, the multiple subbands can be accurately determined according to the first frequency domain resource and the second frequency domain resource.

[0023] In a possible design, second information is sent, where the second information is used to indicate the first frequency domain resource and / or the second frequency domain resource. In this way, the network device can allocate the first frequency domain resource and / or the second frequency domain resource, so that the terminal device determines the multiple subbands.

[0024] In one possible design, the first information is further used to indicate a number of subbands, and the number of subbands is 20, 21, or 22. This can indicate more subbands.

[0025] In one possible design, the first information is further used to indicate a set of subbands, and the at least two subbands are included in the set of subbands. This can indicate the subbands for which the terminal device reports CSI, so that the terminal device can accurately report the corresponding CSI.

[0026] In one possible design, the CSI includes a precoding matrix indicator (PMI) and / or a channel quality indicator (CQI).

[0027] In a third aspect, a communication method is provided. The method can be applied to a communication apparatus, which can be a terminal device or a component (e.g., a processor, a chip, a chip system, a circuit, or a functional module) in a terminal device. The method can include receiving first information, the first information being used to indicate that a CSI reporting manner is a wideband CSI reporting manner; and transmitting two CSIs, one of the two CSIs being determined based on a first frequency domain resource and the other of the two CSIs being determined based on a second frequency domain resource, the first frequency domain resource being a flexible frequency domain resource, and the second frequency domain resource being a downlink frequency domain resource.

[0028] Based on the above method, in the wideband CSI reporting manner, different frequency domain resources can correspond to different CSIs, respectively, so that the reported CSI can be more accurate, and a network device can distinguish the CSI on different frequency domain resources, so that the network device can allocate frequency domain resources reasonably.

[0029] In one possible design, second information is received, the second information being used to indicate the first frequency domain resource and / or the second frequency domain resource. This way, a network device can allocate the first frequency domain resource and / or the second frequency domain resource, so that a terminal device can determine a plurality of subbands.

[0030] In one possible design, the CSI includes a precoding matrix indicator (PMI) and / or a channel quality indicator (CQI).

[0031] In a fourth aspect, the present application provides a communication method, which can be applied to a communication device. The communication device can be a network device or a component (e.g., a processor, a chip, a chip system, a circuit, or a functional module) in the network device. The method can include: sending first information, the first information being used to indicate that a CSI sending manner is a wideband CSI reporting manner; and receiving two CSIs, wherein one of the two CSIs is determined according to a first frequency domain resource, and the other of the two CSIs is determined according to a second frequency domain resource; the first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource.

[0032] Based on the above method, in the wideband CSI reporting manner, different frequency domain resources can correspond to different CSIs respectively, so that the reported CSI is more accurate, and the network device can distinguish the CSI on different frequency domain resources, so that the network device can reasonably allocate the frequency domain resources.

[0033] In a possible design, second information is sent, the second information being used to indicate the first frequency domain resource and / or the second frequency domain resource. In this way, the network device can allocate the first frequency domain resource and / or the second frequency domain resource, so that the terminal device determines a plurality of subbands.

[0034] In a possible design, the CSI includes a precoding matrix indicator (PMI) and / or a channel quality indicator (CQI).

[0035] In a fifth aspect, the present application also provides a communication device. The communication device can be a terminal device or a component (e.g., a processor, a chip, a chip system, a circuit, or a functional module) in the terminal device. The communication device has a function of implementing the method in the first aspect or each possible design example of the first aspect, or the method in the third aspect or each possible design example of the third aspect. The function can be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

[0036] In a possible design, the structure of the communication device can include a processing unit and optionally a transceiving unit. These units can perform the functions of the method in the first aspect or each possible design example of the first aspect, or the method in the third aspect or each possible design example of the third aspect, which will not be repeated here.

[0037] In an example, the communication apparatus can include one or more processors, and optionally, a memory and / or a transceiver, where the transceiver is configured to receive and / or transmit data, message or information, and to communicate with other devices in the system. The processor(s) is configured to support the communication apparatus to perform the method in the first aspect or any of the possible design examples of the first aspect, or the method in the third aspect or any of the possible design examples of the third aspect. The memory is coupled to the processor(s) and stores program instructions and data for the communication apparatus.

[0038] In an example, the communication apparatus can include one or more processors, and optionally, a memory and / or a transceiver, where the transceiver is configured to receive and / or transmit data, message or information, and to communicate with other devices in the system. The processor(s) is configured to support the communication apparatus to perform the method in the first aspect or any of the possible design examples of the first aspect, or the method in the third aspect or any of the possible design examples of the third aspect. The memory is coupled to the processor(s) and stores program instructions and data for the communication apparatus.

[0039] In an example, the communication apparatus can include one or more processors, and optionally, a memory and / or a transceiver, where the transceiver is configured to receive and / or transmit data, message or information, and to communicate with other devices in the system. The processor(s) is configured to support the communication apparatus to perform the method in the first aspect or any of the possible design examples of the first aspect, or the method in the third aspect or any of the possible design examples of the third aspect. The memory is coupled to the processor(s) and stores program instructions and data for the communication apparatus.

[0040] In an example, the communication apparatus can include one or more processors, and optionally, a memory and / or a transceiver, where the transceiver is configured to receive and / or transmit data, message or information, and to communicate with other devices in the system. The processor(s) is configured to support the communication apparatus to perform the method in the first aspect or any of the possible design examples of the first aspect, or the method in the third aspect or any of the possible design examples of the third aspect. The memory is coupled to the processor(s) and stores program instructions and data for the communication apparatus.

[0041] In an example, the communication apparatus can include one or more processors, and optionally, a memory and / or a transceiver, where the transceiver is configured to receive and / or transmit data, message or information, and to communicate with other devices in the system. The processor(s) is configured to support the communication apparatus to perform the method in the first aspect or any of the possible design examples of the first aspect, or the method in the third aspect or any of the possible design examples of the third aspect. The memory is coupled to the processor(s) and stores program instructions and data for the communication apparatus.

[0042] In an eighth aspect, a computer-readable storage medium is provided, which stores program instructions. When the program instructions are executed on a computer, the computer is caused to perform the method in the first aspect and any possible design thereof, or the method in the second aspect and any possible design thereof, or the method in the third aspect and any possible design thereof, or the method in the fourth aspect and any possible design thereof. Exemplarily, the computer-readable storage medium can be any available medium that can be accessed by a computer. For example, but not limited to: the computer-readable medium can include a non-transitory computer-readable medium, a random-access memory (RAM), a read-only memory (ROM), an electrically EPROM (EEPROM), a CD-ROM or other optical disk storage, a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

[0043] In a ninth aspect, a computer program product is provided, which includes a computer program or instructions. When the computer program or instructions are executed on a computer, the method in the first aspect or any possible design thereof, or the method in the second aspect or any possible design thereof, or the method in the third aspect or any possible design thereof, or the method in the fourth aspect or any possible design thereof is performed.

[0044] In a tenth aspect, a chip or chip system is also provided, which includes one or more processors coupled with at least one memory for reading and executing program instructions stored in the memory, so that the chip or chip system implements the method in the first aspect or any possible design thereof, or the method in the second aspect or any possible design thereof, or the method in the third aspect or any possible design thereof, or the method in the fourth aspect or any possible design thereof.

[0045] The technical effects of each of the above-mentioned fifth aspect to tenth aspect and each possible design thereof can refer to the technical effects of the above-mentioned first aspect or any possible design thereof, or the technical effects of the above-mentioned second aspect or any possible design thereof, or the technical effects of the above-mentioned third aspect or any possible design thereof, or the technical effects of the above-mentioned fourth aspect or any possible design thereof, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0046] FIG. 1 is a schematic diagram of an architecture of a communication system provided by the present application;

[0047] FIG. 2 is a schematic diagram of an uplink and downlink slot configuration of TDD provided by the present application;

[0048] FIG. 3 is a schematic diagram of an uplink and downlink slot configuration of SBFD provided by the present application;

[0049] FIG. 4 is a schematic diagram of sub-band non-overlapping full duplex provided by the present application;

[0050] FIG. 5 is a schematic diagram of sub-band overlapping full duplex provided by the present application;

[0051] FIG. 6 is a schematic diagram of IBFD provided by the present application;

[0052] FIG. 7 is a schematic diagram of a communication method provided by the present application;

[0053] FIG. 8 is a schematic diagram of a CSI reporting sub-band (csi-ReportingBand) provided by the present application;

[0054] FIG. 9 is a schematic diagram of sub-band determination provided by the present application;

[0055] FIG. 10 is a schematic diagram of another sub-band determination provided by the present application;

[0056] FIG. 11 is a schematic diagram of sub-band splitting provided by the present application;

[0057] FIG. 12 is a schematic diagram of CSI sending provided by the present application;

[0058] FIG. 13 is a schematic diagram of another communication method provided by the present application;

[0059] FIG. 14 is a schematic diagram of another CSI sending provided by the present application;

[0060] FIG. 15 is a schematic diagram of a communication apparatus provided by the present application;

[0061] FIG. 16 is a schematic diagram of a communication apparatus provided by the present application. DETAILED DESCRIPTION

[0062] The embodiments of the present application provide a communication method and apparatus, which are used to distinguish CSI on different frequency domain resources, so as to reasonably allocate frequency domain resources. The method and apparatus provided by the present application are based on the same technical concept. Since the principles of the method and apparatus for solving problems are similar, the implementation of the apparatus and the method can be referred to each other, and the repeated parts will not be described herein.

[0063] In the description of the present application, the words "first", "second", etc. are used only for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor indicating or implying sequence.

[0064] In the description of the present application, "at least one" means one or more, and more means two or more. "At least one of the following" or the like means any combination of the items, including any combination of single or multiple items. For example, at least one of a, b or c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.

[0065] In the description of the present application, "and / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the cases of A alone, A and B together, B alone, where A, B can be single or multiple. " / " represents "or", for example, a / b represents a or b.

[0066] In order to more clearly describe the technical solutions of the embodiments of the present application, the communication method and device provided by the embodiments of the present application will be described in detail below with reference to the drawings.

[0067] The technical solutions in the embodiments of the present application can be applied to various communication systems, such as universal mobile communication system (UMTS), wireless local area network (WLAN), wireless fidelity (Wi-Fi) system, 4th generation (4G) mobile communication system (such as long term evolution (LTE) system), 5th generation (5G) mobile communication system (such as new radio (NR) system), and future evolved communication system (such as 6th generation (6G) mobile communication system) and the like.

[0068] For example, Fig. 1 shows a possible architecture of a communication system to which the embodiments of the present application are applicable. As shown in Fig. 1, the communication system 10 can include a radio access network (RAN) 100 and a core network (CN) 200. Optionally, the communication system 10 can also include an Internet 300.

[0069] The RAN 100 includes at least one RAN node (e.g., 110a and 110b in FIG. 1, collectively referred to as 110) and at least one terminal device (e.g., 120a-120j in FIG. 1, collectively referred to as 120). Other RAN nodes, such as wireless relay devices and / or wireless backhaul devices (not shown in FIG. 1), etc., can also be included in the RAN 100. The terminal devices 120 are wirelessly connected to the RAN nodes 110. The RAN nodes 110 are connected to a core network 200 through wireless or wired means. The core network devices in the core network 200 and the RAN nodes 110 in the RAN 100 can be different physical devices respectively, or can be the same physical device integrated with the logical functions of the core network and the logical functions of the wireless access network.

[0070] The RAN 100 can be a 3rd generation partnership project (3GPP) related cellular system, such as a 4G, 5G mobile communication system, or a future-oriented evolved system (e.g., a 6G mobile communication system). The RAN 100 can also be an open radio access network (O-RAN or ORAN), a cloud radio access network (CRAN), or a WiFi system. The RAN 100 can also be a communication system that combines two or more of the above systems.

[0071] The RAN nodes 110, which can also be referred to as RAN entities or access nodes, etc., form part of the communication system and help terminal devices to access wirelessly. The RAN nodes 110 in the communication system 10 can be of the same type or of different types. In some scenarios, the roles of the RAN nodes 110 and the terminal devices 120 are relative, e.g., the network element 120i in FIG. 1 can be a helicopter or a drone, which can be configured as a mobile base station. For a terminal 120j that accesses the RAN 100 through the network element 120i, the network element 120i is a base station; but for the base station 110a, the network element 120i is a terminal device. The RAN nodes 110 and the terminal devices 120 are sometimes collectively referred to as communication apparatuses, e.g., the network elements 110a and 110b in FIG. 1 can be understood as communication apparatuses with base station functions, and the network elements 120a-120j can be understood as communication apparatuses with terminal device functions.

[0072] The RAN nodes can also be referred to as network devices. In the following, the network devices are used for description unless specifically stated otherwise.

[0073] In a possible scenario, the network device can also be referred to as an access network device, which can be a base station, an evolved NodeB (eNodeB), an access point (AP), a transmission reception point (TRP), a next generation NodeB (gNB), a next generation base station in a 6G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, and the like. The access network device can be a macro base station (such as 110a in FIG. 1), a micro base station or an indoor station (such as 110b in FIG. 1), a relay node or a donor node, or a wireless controller in a CRAN scenario. Optionally, the access network device can also be a server, a wearable device, a vehicle or a vehicle-mounted device, and the like. For example, the access network device in vehicle to everything (V2X) technology can be a road side unit (RSU). All or part of the functions of the access network device in this application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform). The access network device in this application can also be a logical node, a logical module or software that can implement all or part of the functions of the access network device.

[0074] In another possible scenario, multiple access network devices cooperate to assist a terminal device to implement wireless access, and different access network devices respectively implement part of the functions of a base station. For example, the access network device can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), and the like. The CU and the DU can be separately arranged, or can be included in the same network element, such as a baseband unit (BBU). The RU can be included in a radio frequency device or a radio frequency unit, such as a remote radio unit (RRU), an active antenna processing unit (AAU), or a remote radio head (RRH).

[0075] In different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, the CU can also be referred to as an open CU (O-CU), the DU can also be referred to as an open DU (O-DU), the CU-CP can also be referred to as an open CU-CP (O-CU-CP), the CU-UP can also be referred to as an open CU-UP (O-CU-UP), and the RU can also be referred to as an open RU (O-RU). Any of the CUs (or CU-CP, CU-UP), DUs and RUs in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0076] The terminal device can also be referred to as a user equipment (UE), a mobile station, a mobile terminal, etc. The terminal device can be widely applied to various scenarios, such as device-to-device (D2D) communication, vehicle to everything (V2X) communication, machine-type communication (MTC), internet of things (IOT), virtual reality, augmented reality, industrial control, autonomous driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal device can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc. Embodiments of the present application do not limit the device form of the terminal device.

[0077] In some scenarios, the network device can send a downlink signal to the terminal device, and the terminal device can send an uplink signal to the network device. In addition, the network devices can also communicate with each other, and the terminal devices can also communicate with each other.

[0078] The communication system described in the embodiments of the present application is used to more clearly illustrate the technical solutions of the embodiments of the present application, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those skilled in the art can know that the technical solutions provided by the embodiments of the present application are also applicable to similar technical problems as the network architecture evolves and new business scenarios appear.

[0079] The related terms or technologies involved in the embodiments of the present application will be explained first. It should be noted that these explanations are to make the embodiments of the present application easier to understand, and should not be regarded as a limitation on the scope of protection required by the present application.

[0080] 1) Cross link interference (CLI): interference between communication links in opposite directions, such as uplink-to-downlink interference, or downlink-to-uplink interference.

[0081] 2) Time division duplexing (TDD)

[0082] TDD divides time domain resources into uplink and downlink, for example, one possible TDD uplink-downlink slot configuration is DDDSU, as shown in FIG. 2. Wherein D represents a downlink slot, each symbol in the downlink slot is a downlink symbol, U represents an uplink slot, each symbol in the uplink slot is an uplink symbol, and S is a special slot, which includes at least one flexible symbol, which can be used for uplink transmission, downlink transmission or guard interval.

[0083] In TDD, downlink slots occupy the main time domain resources, so that the allocation of uplink time domain resources is limited, resulting in reduced uplink coverage and large delay of TDD.

[0084] 3) Subband full duplex (SBFD)

[0085] To solve the problems of uplink coverage and delay in TDD systems, an enhanced scheme SBFD is proposed.

[0086] SBFD divides the frequency band on the downlink symbol (and / or flexible symbol) into at least one uplink subband, and allows uplink signals to be transmitted on the uplink subband of the downlink symbol (and / or flexible symbol), as shown in FIG. 3. Wherein the frequency domain resources outside the uplink subband can still be used for downlink transmission, which is called downlink subband. Compared with TDD, SBFD has more uplink resources to improve uplink coverage performance, and each slot has uplink resources for hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback to reduce delay.

[0087] SBFD includes two modes: subband overlapping full duplex and subband non-overlapping full duplex. Subband non-overlapping full duplex requires that the subband configuration of the entire network is the same, as shown in FIG. 4; while for subband overlapping full duplex, the subband configuration of the entire network can be different, as shown in FIG. 5.

[0088] 4) In-band full duplex (IBFD)

[0089] Another enhancement scheme, IBFD, is proposed to address the uplink coverage and latency issues in TDD systems.

[0090] IBFD can perform uplink transmission and downlink transmission simultaneously on the same time-frequency resource, as shown in FIG. 6. Compared with TDD and SBFD, IBFD has more uplink resources and downlink resources to improve uplink performance and downlink performance, and can also effectively reduce latency.

[0091] 5) Flexible frequency domain resource and downlink frequency domain resource

[0092] In the sub-band overlapping full duplex mode of SBFD, the flexible frequency domain resource can be used for downlink transmission of the first network device and for uplink transmission of the second network device, such as the flexible frequency domain resource shown in FIG. 5. In the sub-band overlapping full duplex mode of SBFD, the flexible frequency domain resource can also be referred to as an overlapping frequency domain resource, or can also have other descriptions, which are not limited by the present application.

[0093] In IBFD, the flexible frequency domain resource can be used for uplink transmission between the first network device and the first terminal device, and at the same time can be used for downlink transmission between the first network device and the second terminal device, such as the flexible frequency domain resource shown in FIG. 6. In IBFD, the flexible frequency domain resource can also be referred to as a full duplex frequency domain resource, or can also have other descriptions, which are not limited by the present application.

[0094] It should be understood that the first network device, the second network device, the first terminal device and the second terminal device are only examples and do not limit the present application.

[0095] The flexible frequency domain resource can also be understood as a frequency domain resource that has gNB-gNB intra-subband CLI and gNB-gNB inter-subband CLI.

[0096] The downlink frequency domain resource can be used for downlink transmission of any network device. For example, the downlink frequency domain resource shown in FIG. 5 and FIG. 6.

[0097] The downlink frequency domain resource can also be understood as a frequency domain resource that has gNB-gNB inter-subband CLI but does not have gNB-gNB intra-subband CLI.

[0098] The communication method provided by the embodiments of the present application is described in detail below. In the following embodiments, the communication method provided by the present application is described in detail by taking a terminal device and a network device as examples. It should be understood that the operations performed by the terminal device can also be implemented by a processor, or a chip or chip system, or a functional module, etc. in the terminal device; and the operations performed by the network device can also be implemented by a processor, or a chip or chip system, or a functional module, etc. in the network device, and the present application does not make any limitation in this regard.

[0099] Based on the above description, the communication method provided by the embodiments of the present application can be referred to FIG. 7. The flow of the method can include:

[0100] Step 701: The network device sends first information. Correspondingly, the terminal device receives the first information. The first information is used to indicate that the CSI sending mode is a sub-band CSI reporting mode.

[0101] Step 702: The terminal device sends at least two CSIs. Correspondingly, the network device receives the at least two CSIs. The at least two CSIs are determined according to at least two sub-bands, the at least two CSIs correspond to the at least two sub-bands one by one, and the at least two sub-bands are determined according to a first frequency domain resource and a second frequency domain resource. The first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource.

[0102] Optionally, the first information can be a frequency domain reporting configuration (reportFreqConfiguration), or the first information can be carried in the reportFreqConfiguration.

[0103] In some embodiments, the CSI can include a precoding matrix indication (PMI) and / or a channel quality indicator (CQI).

[0104] Correspondingly, the first information used to indicate that the CSI sending mode is a sub-band CSI reporting mode can be understood as the first information used to indicate that the CQI sending mode is a sub-band CQI reporting mode and / or used to indicate that the PMI sending mode is a sub-band PMI reporting mode.

[0105] Optionally, the first information can include first sub-information and / or second sub-information. The first sub-information is used to indicate that the CQI sending mode is a sub-band CQI reporting mode, and the second sub-information is used to indicate that the PMI sending mode is a sub-band PMI reporting mode.

[0106] In an example, the first sub-information can be a CQI format indicator (cqi-FormatIndicator), or the first information can be carried in the cqi-FormatIndicator.

[0107] The second sub-information can be a PMI format indicator (pmi-FormatIndicator), or the first information can be carried in the pmi-FormatIndicator.

[0108] In an optional implementation, the first information can also be used to indicate a set of sub-bands, and at least two sub-bands are included in the set of sub-bands.

[0109] Optionally, the first information can further include third sub-information, and the third sub-information is used to indicate the set of sub-bands.

[0110] For example, the third sub-information can be a CSI reporting sub-band (csi-ReportingBand), or the third sub-information can also be carried in the csi-ReportingBand. For example, the csi-ReportingBand can be as shown in FIG. 8.

[0111] In some embodiments, the first information can also be used to indicate a number of sub-bands, and the number of sub-bands can be greater than 19.

[0112] Optionally, the number of sub-bands can be indicated by the third sub-information. For example, the number of sub-bands can be 20, 21, or 22, as shown in FIG. 8.

[0113] In some embodiments, the network device can also send second information before sending the first information. Correspondingly, the terminal device can also receive the second information before receiving the first information. The second information can be used to indicate the first frequency domain resource and / or the second frequency domain resource.

[0114] In an example, the first frequency domain resource can be used for downlink transmission of the network device, and the second frequency domain resource can be used for downlink transmission of the network device. For other network devices, the first frequency domain resource can be used for uplink transmission of the other network devices, and the second frequency domain resource can be used for downlink transmission of the other network devices. For example, the first frequency domain resource can be a flexible frequency domain resource shown in FIG. 5, and the second frequency domain resource can be a downlink frequency domain resource shown in FIG. 5.

[0115] In another example, the first frequency domain resource can be used for downlink transmission between the network device and the terminal device, and can also be used for uplink transmission between the network device and other terminal devices, and the second frequency domain resource can be used for downlink transmission between any network device and terminal device. For example, the first frequency domain resource can be the flexible frequency domain resource shown in FIG. 6, and the second frequency domain resource can be the downlink frequency domain resource shown in FIG. 6.

[0116] That is, on the first frequency domain resource, the transmission direction of different network devices can be different, and on the second frequency domain resource, the transmission direction of different network devices is the same and is downlink transmission.

[0117] In some embodiments, the first frequency domain resource can be a continuous frequency domain resource in the frequency domain, or the first frequency domain resource can also include at least one non-continuous frequency domain resource in the frequency domain.

[0118] The second frequency domain resource can be a continuous frequency domain resource in the frequency domain, or the second frequency domain resource can also include at least one non-continuous frequency domain resource in the frequency domain.

[0119] It should be understood that when the first frequency domain resource and / or the second frequency domain resource includes at least one non-continuous resource, the second information used to indicate the first frequency domain resource can indicate at least one non-continuous resource corresponding to the first frequency domain resource, and / or the second information used to indicate the second frequency domain resource can indicate at least one non-continuous resource corresponding to the second frequency domain resource.

[0120] In one possible way, if the second information indicates the first frequency domain resource or the second frequency domain resource, the terminal device can determine the other frequency domain resource through the total number of configured resources and resource positions, etc.

[0121] In an optional implementation, before sending the at least two CSIs, the terminal device can also determine a plurality of subbands according to the first frequency domain resource and the second frequency domain resource, the plurality of subbands including at least two subbands, and the plurality of subbands satisfying one or more of the following conditions:

[0122] Each subband is continuous in the frequency domain;

[0123] Each two subbands do not overlap in the frequency domain;

[0124] Each subband only overlaps with the first frequency domain resource or only overlaps with the second frequency domain resource;

[0125] The union of the plurality of subbands in the frequency domain is equal to the BWP;

[0126] Each subband includes a maximum of N frequency domain units, N being a positive integer; or

[0127] The two adjacent subbands including less than N frequency domain units do not overlap with the first frequency domain resource at the same time or do not overlap with the second frequency domain resource at the same time.

[0128] By satisfying the above conditions through the subbands, the CSI reported for the subbands can be explicitly reported on the resources, so that the reported CSI is more accurate.

[0129] In an exemplary method, the terminal device determines a plurality of subbands according to the first frequency domain resource and the second frequency domain resource, which can be implemented by the following method: the terminal device can determine a plurality of frequency unit groups, one frequency unit group including N frequency units, the plurality of frequency unit groups being continuous in the frequency domain, N being a positive integer; then, the terminal device determines at least one subband in each frequency unit group that overlaps with the first frequency domain resource, and / or determines at least one subband in each frequency unit group that overlaps with the second frequency domain resource, to obtain the plurality of subbands.

[0130] Specifically, the terminal device can implement the following steps:

[0131] A1, the terminal device can define that N continuous frequency units constitute a frequency unit group, the starting frequency unit of the first frequency unit group is a reference frequency unit, and the starting frequency unit of each frequency unit group other than the first frequency unit group is the next frequency unit of the last frequency unit of the previous frequency unit group.

[0132] A2, the terminal device determines each group of continuous frequency units to constitute a subband in at least one frequency unit of one frequency unit group that overlaps with the first frequency domain resource; similarly, the terminal device determines each group of continuous frequency units to constitute a subband in at least one frequency unit of one frequency unit group that overlaps with the second frequency domain resource.

[0133] A3, the terminal device arranges the indexes of the subbands in the order of frequency from low to high to obtain the plurality of subbands.

[0134] For example, as shown in FIG. 9, N=8 continuous frequency units constitute a frequency unit group, and FIG. 9 takes the terminal device determining 4 frequency unit groups as an example. In the direction of frequency from low to high, 5 continuous frequency units in the first frequency unit group that overlap with the second frequency domain resource are determined as subband 0, 8 continuous frequency units in the second frequency unit group that overlap with the second frequency domain resource are determined as subband 1, 3 continuous frequency units in the third frequency unit group that overlap with the second frequency domain resource are determined as subband 2, 5 continuous frequency units in the third frequency unit group that overlap with the first frequency domain resource are determined as subband 3, and 3 continuous frequency units in the fourth frequency unit group that overlap with the first frequency domain resource are determined as subband 4, thereby obtaining 5 subbands.

[0135] It should be understood that FIG. 9 is merely an example and is not a limitation of the present application.

[0136] FIG. 9 only takes the first frequency domain resource and the second frequency domain resource as an example of a continuous frequency domain resource. Alternatively, when the first frequency domain resource includes at least one non-continuous frequency domain resource and / or the second frequency domain resource includes at least one non-continuous frequency domain resource, more subbands than those shown in FIG. 9 can be obtained, which will not be described in detail here.

[0137] Optionally, the reference frequency unit can be a common resource block 0 (CRB0). It should be understood that the indices of the BWP, the first frequency domain resource, and the second frequency domain resource in the description of the present application are all determined based on the CRB0.

[0138] In another exemplary method, the terminal device determines a plurality of subbands according to the first frequency domain resource and the second frequency domain resource, which can be implemented by the following method: the terminal device can perform the following operations for the first frequency domain resource and the second frequency domain resource, respectively, to obtain a plurality of subbands:

[0139] The terminal device can determine the size of the first subband according to the index of the starting frequency unit of the target frequency domain resource, the number of frequency units included in the target frequency domain resource, and N; N is a positive integer; the terminal device can determine the size of other subbands except the first subband and the last subband as N; the terminal device can determine the size of the last subband according to the index of the starting frequency unit of the target frequency domain resource, the number of frequency units included in the target frequency domain resource, and the size of the first subband and the size of other subbands; wherein the target frequency domain resource is the first frequency domain resource or the second frequency domain resource.

[0140] Specifically, the terminal device can implement the following steps:

[0141] For the ith frequency domain resource (i.e., the target frequency domain resource), where i = 1 or 2, i = 1 represents the first frequency domain resource, and i = 2 represents the second frequency domain resource:

[0142] The terminal device determines the size of the first subband as wherein indicates the index of the starting frequency unit of the ith frequency domain resource;

[0143] If then the terminal device determines the size of the last subband as otherwise, the size of the last subband is N; wherein indicates the number of frequency units included in the ith frequency domain resource;

[0144] The terminal device determines that the size of the other subbands except the first subband and the last subband is N.

[0145] The terminal device arranges the indexes of the subbands in the order from low to high frequency, and obtains the plurality of subbands.

[0146] The size of the subband can be understood as the number of frequency units included in the subband.

[0147] For example, as shown in FIG. 10, assuming that N = 8, the index of the starting frequency unit of the second frequency domain resource is 3, the number of frequency units included in the second frequency domain resource is 16, for the second frequency domain resource, the size of the first subband is 3. Therefore, the size of the last subband in the second frequency domain resource is 3, and the size of the other subbands except the first subband and the last subband on the second frequency domain resource is 8, so the subbands on the second frequency domain resource can be obtained as subband 0, subband 1 and subband 2 in FIG. 10. Similarly, as shown in FIG. 10, the index of the starting frequency unit of the first frequency domain resource is 3, the number of frequency units included in the first frequency domain resource is 8, for the first frequency domain resource, the size of the first subband is 3. Therefore, the size of the last subband in the first frequency domain resource is 3, so the subbands on the first frequency domain resource can be obtained as subband 3 and subband 4 in FIG. 10.

[0148] The subbands determined by the above method can also be understood as follows: if one of the currently determined subbands overlaps with the first frequency domain resource and the second frequency domain resource at the same time, the subband can be split into at least two subbands, and the split subbands satisfy one or more conditions described above. For example, as shown in FIG. 11, if the subbands determined according to the current method can include subband 0-subband 3, it can be seen from FIG. 11 that subband 2 overlaps with the first frequency domain resource and the second frequency domain resource at the same time, so subband 2 can be split into subband 2 and subband 3 to obtain subband 0-subband 4 satisfying the conditions of the present application.

[0149] Optionally, the newly split subband 2 shown in FIG. 11 can not be a whole, but can include a plurality of subbands, and subband 3 can also not be a whole, but can include a plurality of subbands, that is, more than 5 subbands can be obtained, which is not limited in the present application.

[0150] In some embodiments, the network device can also determine a plurality of subbands according to the first frequency domain resource and the second frequency domain resource before receiving at least two CSIs. The conditions satisfied by the plurality of subbands can be referred to the foregoing description, which will not be described herein.

[0151] ​​The method for determining the plurality of subbands by the network device is similar to the method for determining the plurality of subbands by the terminal device, and can be referred to each other, which will not be repeated here.

[0152] In an optional embodiment, the network device transmits a first signal before receiving the at least two CSIs, and correspondingly, the terminal device receives the first signal, and then transmits the at least two CSIs according to the first signal.

[0153] For example, the first signal can be a channel state information reference signal (CSI-RS).

[0154] In some embodiments, assuming that the at least two CSIs are M, the M CSIs are determined based on M subbands, for example, CSI#0-CSI#M-1 are determined based on subband 0-subband M-1 respectively. It can also be understood that CSI#0-CSI#M-1 correspond to subband 0-subband M-1 respectively, or it can be understood that CSI#0-CSI#M-1 are CSIs on subband 0-subband M-1 respectively. For example, as shown in FIG. 12, assuming that 5 CSIs are determined based on 5 subbands respectively, FIG. 12 shows a schematic diagram of transmitting CSI, taking CSI including CQI and PMI as an example.

[0155] Based on the above communication method, in the subband CSI reporting mode, by determining the at least two CSIs based on the first frequency domain resource and the second frequency domain resource, the CSI reported in the subband can be reported on the explicit resource, so that the reported CSI is more accurate, and the network device can distinguish the CSI on different frequency domain resources, so that the network device can reasonably allocate the frequency domain resource.

[0156] The embodiment of the present application also provides another communication method, which can be referred to FIG. 13. The flow of the method can include:

[0157] Step 1301: The network device transmits first information. Correspondingly, the terminal device receives the first information. Wherein, the first information is used to indicate that the CSI transmission mode is a wideband CSI reporting mode.

[0158] Step 1302: The terminal device transmits two CSIs. Correspondingly, the network device receives the two CSIs. Wherein, one of the two CSIs is determined according to the first frequency domain resource, and the other CSI is determined according to the second frequency domain resource; the first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource.

[0159] Optionally, the first information can be a report frequency configuration (reportFreqConfiguration), or the first information can be carried in the reportFreqConfiguration.

[0160] In some embodiments, the CSI can include a precoding matrix indication (PMI) and / or a channel quality indicator (CQI).

[0161] Correspondingly, the first information is used to indicate a bandwidth CSI reporting manner for sending the CSI, which can be understood as the first information being used to indicate a bandwidth CQI reporting manner for sending the CQI and / or a bandwidth PMI reporting manner for sending the PMI.

[0162] Optionally, the first information can include first sub-information and / or second sub-information, the first sub-information being used to indicate a bandwidth CQI reporting manner for sending the CQI, and the second sub-information being used to indicate a bandwidth PMI reporting manner for sending the PMI.

[0163] In an example, the first sub-information can be a CQI format indication (cqi-FormatIndicator), or the first information can be carried in the cqi-FormatIndicator.

[0164] The second sub-information can be a PMI format indication (pmi-FormatIndicator), or the first information can be carried in the pmi-FormatIndicator.

[0165] In some embodiments, the network device can further send second information before sending the first information. Correspondingly, the terminal device can further receive the second information before receiving the first information. The second information can be used to indicate the first frequency domain resource and / or the second frequency domain resource.

[0166] The first frequency domain resource and the second frequency domain resource can refer to the related descriptions described above, and will not be described here.

[0167] In an optional implementation, the network device sends a first signal before receiving the two CSIs, and correspondingly, the terminal device receives the first signal and then sends the two CSIs according to the first signal.

[0168] Exemplarily, the first signal can be a CSI-RS.

[0169] In some embodiments, assuming that the two CSIs are CSI#0 and CSI#1, the CSI#0 can be determined based on the second frequency domain resource, and the CSI#1 can be determined based on the first frequency domain resource. It can also be understood that the CSI#0 corresponds to the second frequency domain resource, and the CSI#1 corresponds to the first frequency domain resource, or it can also be understood that the CSI#0 is the CSI on the second frequency domain resource, and the CSI#1 is the CSI on the first frequency domain resource. For example, a schematic diagram for sending two CSIs is shown in FIG. 14, taking the CSI including CQI and PMI as an example.

[0170] Based on the above method, in the wideband CSI reporting mode, different CSIs can be respectively corresponded to different frequency domain resources, so that the reported CSI is more accurate, and the network device can distinguish the CSI on different frequency domain resources, so that the network device can reasonably allocate the frequency domain resources.

[0171] Based on the above embodiments, the embodiments of the present application further provide a communication device. Referring to FIG. 15, the communication device 1500 can include a transceiver unit 1501 and a processing unit 1502. The transceiver unit 1501 is configured to perform communication of the communication device 1500, such as receiving information (message or data) or sending information (message or data), and the processing unit 1502 is configured to control and manage the actions of the communication device 1500. The processing unit 1502 can also control the steps performed by the transceiver unit 1501.

[0172] For example, the communication device 1500 can be a terminal device, a processor of the terminal device, a chip, a chip system, or a functional module in the above embodiments. Alternatively, the communication device 1500 can be a network device, a processor of the network device, a chip, a chip system, or a functional module in the above embodiments.

[0173] In one embodiment, when the communication device 1500 is used to implement the functions of the terminal device in the above embodiment shown in FIG. 7, the transceiver unit 1501 can be configured to receive first information, the first information being used to indicate that the sending channel state information (CSI) mode is a sub-band CSI reporting mode, and send at least two CSIs, wherein the at least two CSIs are determined according to at least two sub-bands, the at least two CSIs correspond to the at least two sub-bands one by one, and the at least two sub-bands are determined according to the first frequency domain resource and the second frequency domain resource. The first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource. The processing unit 1502 can be configured to control the transceiving operation of the transceiver unit 1501.

[0174] In some embodiments, the processing unit 1502 can be further configured to determine a plurality of subbands according to the first frequency domain resource and the second frequency domain resource, the plurality of subbands comprising the at least two subbands, the plurality of subbands satisfying one or more of the following:

[0175] each subband is continuous in the frequency domain;

[0176] each two subbands do not overlap in the frequency domain;

[0177] each subband only overlaps with the first frequency domain resource or only overlaps with the second frequency domain resource;

[0178] a union of the plurality of subbands in the frequency domain is equal to a bandwidth part (BWP);

[0179] each subband comprises a number of frequency domain units that is at most N, where N is a positive integer; or

[0180] adjacent two subbands that comprise a number of frequency domain units that is less than N do not overlap with the first frequency domain resource at the same time or do not overlap with the second frequency domain resource at the same time.

[0181] In an optional implementation, when determining the plurality of subbands according to the first frequency domain resource and the second frequency domain resource, the processing unit 1502 can be configured to: determine a plurality of frequency unit groups, one frequency unit group comprising N frequency units, the plurality of frequency unit groups being continuous in the frequency domain, where N is a positive integer; determine that, in each frequency unit group, a frequency unit that overlaps with the first frequency domain resource is at least one subband, and / or, determine that, in each frequency unit group, a frequency unit that overlaps with the second frequency domain resource is at least one subband, to obtain the plurality of subbands.

[0182] In another optional implementation, when determining the plurality of subbands according to the first frequency domain resource and the second frequency domain resource, the processing unit 1502 can be configured to: for the first frequency domain resource and the second frequency domain resource, respectively, perform the following operations to obtain the plurality of subbands: determining a size of a first subband according to an index of a starting frequency unit of a target frequency domain resource, a number of frequency units included in the target frequency domain resource, and N, where N is a positive integer; determining sizes of subbands other than the first subband and a last subband as N; determining a size of the last subband according to the index of the starting frequency unit of the target frequency domain resource, the number of frequency units included in the target frequency domain resource, and the size of the first subband and the sizes of the other subbands; where the target frequency domain resource is the first frequency domain resource or the second frequency domain resource.

[0183] In an example, the transceiver 1501 can further be configured to receive second information, where the second information is used to indicate the first frequency domain resource and / or the second frequency domain resource.

[0184] In some embodiments, the first information can be further used to indicate a number of subbands, where the number of subbands is 20, 21, or 22.

[0185] In some embodiments, the first information can be further used to indicate a set of subbands, where the at least two subbands are included in the set of subbands.

[0186] In an example, the CSI can include a precoding matrix indicator (PMI) and / or a channel quality indicator (CQI).

[0187] In another embodiment, when the communication apparatus 1500 is configured to implement the functions of the network device in the embodiment shown in FIG. 7, the transceiver 1501 can be configured to transmit first information, where the first information is used to indicate that a manner of transmitting channel state information (CSI) is a subband CSI reporting manner; and receive at least two CSIs, where the at least two CSIs are determined according to at least two subbands, the at least two CSIs correspond to the at least two subbands in a one-to-one manner, and the at least two subbands are determined according to a first frequency domain resource and a second frequency domain resource; the first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource. The processing unit 1502 can be configured to control the transceiving operation of the transceiver 1501.

[0188] In an optional embodiment, the processing unit 1502 can be further configured to determine a plurality of subbands according to the first frequency domain resource and the second frequency domain resource, where the plurality of subbands includes the at least two subbands, and the plurality of subbands satisfies one or more of the following conditions:

[0189] Each of the subbands is continuous in the frequency domain;

[0190] Each of the subbands is continuous in the frequency domain;

[0191] Each of the subbands only overlaps with the first frequency domain resource or only overlaps with the second frequency domain resource;

[0192] The union set of the plurality of subbands in the frequency domain is equal to a bandwidth part (BWP);

[0193] Each of the subbands includes a maximum of N frequency domain units, where N is a positive integer; or

[0194] The number of frequency domain units included in each of the subbands is less than N, and adjacent two subbands that include the number of frequency domain units less than N do not overlap with the first frequency domain resource at the same time or do not overlap with the second frequency domain resource at the same time.

[0195] In some embodiments, the processing unit 1502, when determining the plurality of subbands according to the first frequency domain resource and the second frequency domain resource, can be configured to: determine a plurality of groups of frequency units, one of the groups of frequency units including N frequency units, the plurality of groups of frequency units being consecutive in the frequency domain, the N being a positive integer; determine at least one subband for each of the groups of frequency units that overlaps with the first frequency domain resource, and / or determine at least one subband for each of the groups of frequency units that overlaps with the second frequency domain resource, to obtain the plurality of subbands.

[0196] In another embodiment, the processing unit 1502, when determining the plurality of subbands according to the first frequency domain resource and the second frequency domain resource, can be configured to: perform the following operations for the first frequency domain resource and the second frequency domain resource respectively to obtain the plurality of subbands:

[0197] determine a size of a first subband according to an index of a starting frequency unit of the target frequency domain resource, a number of frequency units included in the target frequency domain resource, and N, the N being a positive integer;

[0198] determine a size of each of the other subbands except the first subband and a last subband as N;

[0199] determine a size of the last subband according to the index of the starting frequency unit of the target frequency domain resource, the number of frequency units included in the target frequency domain resource, the size of the first subband, and the size of the other subbands;

[0200] wherein the target frequency domain resource is the first frequency domain resource or the second frequency domain resource.

[0201] Optionally, the transceiver 1501 can be further configured to send second information, the second information being used to indicate the first frequency domain resource and / or the second frequency domain resource.

[0202] In an example, the first information can be further used to indicate a number of subbands, the number of subbands being 20, 21, or 22.

[0203] In another example, the first information can be further used to indicate a set of subbands, the at least two subbands being included in the set of subbands.

[0204] Optionally, the CSI includes a precoding matrix indicator (PMI) and / or a channel quality indicator (CQI).

[0205] In yet another embodiment, when the communication apparatus 1500 is used to implement the functions of the network device in the embodiment of Figure 13, the transceiver unit 1501 can be configured to send first information indicating that the manner of sending channel state information CSI is a wideband CSI reporting manner, and receive two CSIs, wherein one of the two CSIs is determined according to a first frequency domain resource, and the other of the two CSIs is determined according to a second frequency domain resource; the first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource. The processing unit 1502 can be configured to control the transceiving operation of the transceiver unit 1501.

[0206] In an optional implementation, the transceiver unit 1501 can also be configured to receive second information indicating the first frequency domain resource and / or the second frequency domain resource.

[0207] For example, the CSI includes a precoding matrix indicator PMI and / or a channel quality indicator CQI.

[0208] In yet another embodiment, when the communication apparatus 1500 is used to implement the functions of the network device in the embodiment of Figure 13, the transceiver unit 1501 can be configured to send first information indicating that the manner of sending channel state information CSI is a wideband CSI reporting manner, and receive two CSIs, wherein one of the two CSIs is determined according to a first frequency domain resource, and the other of the two CSIs is determined according to a second frequency domain resource; the first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource. The processing unit 1502 can be configured to control the transceiving operation of the transceiver unit 1501.

[0209] In an optional implementation, the transceiver unit 1501 can also be configured to send second information indicating the first frequency domain resource and / or the second frequency domain resource.

[0210] For example, the CSI includes a precoding matrix indicator PMI and / or a channel quality indicator CQI.

[0211] It should be noted that the division of units in the embodiments of the present application is illustrative, and is merely a logical function division. In actual implementation, another division manner can be used. The functional units in the embodiments of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0212] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor execute all or part of the steps of the method described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program code storage media.

[0213] Based on the above embodiments, the embodiments of the present application also provide a communication device. Referring to FIG. 16, the communication device 1600 can include one or more processors 1602. Optionally, the communication device 1600 can also include a transceiver 1601. Optionally, the communication device 1600 can also include at least one memory 1603. The memory 1603 can be arranged inside the communication device 1600, or arranged outside the communication device 1600. The processor 1602 can control the transceiver 1601 to receive and send information, messages or data.

[0214] Specifically, the processor 1602 can be a central processing unit (CPU), a network processor (NP), or a combination of the CPU and the NP. The processor 1602 can further include a hardware chip. The hardware chip can be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof. The PLD can be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.

[0215] The transceiver 1601, the processor 1602 and the memory 1603 are connected with each other. Optionally, the transceiver 1601, the processor 1602 and the memory 1603 are connected with each other through a bus 1604. The bus 1604 can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of indication, only one thick line is used in FIG. 16, but it does not mean that there is only one bus or only one type of bus.

[0216] In an optional implementation, the memory 1603 is configured to store programs, etc. Specifically, the programs can include program codes including computer operation instructions. The memory 1603 can include a RAM, and can also include a non-volatile memory such as one or more disk memories. The processor 1602 executes the programs stored in the memory 1603 to implement the above functions, thereby implementing the functions of the communication apparatus 1600.

[0217] For example, the communication apparatus 1600 can specifically implement the functions of the network device or the terminal device in the above embodiments.

[0218] In one embodiment, when the communication apparatus 1600 implements the functions of the terminal device in the above method embodiments shown in FIG. 7, the transceiver 1601 can implement the transceiving operations performed by the terminal device in the above method embodiments shown in FIG. 7, and the processor 1602 can implement other operations performed by the terminal device in the above method embodiments shown in FIG. 7, except the transceiving operations. For specific descriptions, refer to the related descriptions in the above method embodiments shown in FIG. 7, which will not be described in detail here.

[0219] In another embodiment, when the communication apparatus 1600 implements the functions of the network device in the above method embodiments shown in FIG. 7, the transceiver 1601 can implement the transceiving operations performed by the network device in the above method embodiments shown in FIG. 7, and the processor 1602 can implement other operations performed by the network device in the above method embodiments shown in FIG. 7, except the transceiving operations. For specific descriptions, refer to the related descriptions in the above method embodiments shown in FIG. 7, which will not be described in detail here.

[0220] In yet another embodiment, when the communication apparatus 1600 implements the functions of the terminal device in the method embodiments shown in FIG. 13, the transceiver 1601 can implement the transceiving operations performed by the terminal device in the method embodiments shown in FIG. 13; and the processor 1602 can implement the operations other than the transceiving operations performed by the terminal device in the method embodiments shown in FIG. 13. For specific details, refer to the related description in the method embodiments shown in FIG. 13, which will not be described in detail here.

[0221] In yet another embodiment, when the communication apparatus 1600 implements the functions of the network device in the method embodiments shown in FIG. 13, the transceiver 1601 can implement the transceiving operations performed by the network device in the method embodiments shown in FIG. 13; and the processor 1602 can implement the operations other than the transceiving operations performed by the network device in the method embodiments shown in FIG. 13. For specific details, refer to the related description in the method embodiments shown in FIG. 13, which will not be described in detail here.

[0222] Based on the above embodiments, the embodiments of the present application provide a communication system, which can include the network device and the terminal device and the like involved in the above embodiments.

[0223] The embodiments of the present application further provide a computer readable storage medium for storing a computer program or instructions, which, when executed by a computer, can implement the communication method provided by the above method embodiments.

[0224] The embodiments of the present application further provide a computer program product for storing a computer program or instructions, which, when executed by a computer, can implement the communication method provided by the above method embodiments.

[0225] The embodiments of the present application further provide a chip or chip system, which includes a logic circuit for executing the communication method provided by the above method embodiments.

[0226] The embodiments of the present application further provide a chip or chip system, which includes one or more processors coupled with at least one memory, for invoking the program in the memory to make the chip or chip system implement the communication method provided by the above method embodiments.

[0227] The embodiments of the present application further provide a chip or chip system, which is coupled with at least one memory, and is used to implement the communication method provided by the above method embodiments.

[0228] Those skilled in the art will appreciate that embodiments of the present application can be readily used as software, hardware, or a combination of software and hardware. In a software embodiment, various software modules in accordance with embodiments of the present application are stored in a memory such as a computer memory or disk storage for use by, or in connection with, the software on the computer system. The software can provide for programs to be transferred to another computer readable medium (e.g., a removable medium, or a medium conveyed through a computer network) for use in a different system.

[0229] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks or in conjunction with the flowcharts described above.

[0230] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks or in conjunction with the flowcharts described above.

[0231] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks or in conjunction with the flowcharts described above.

[0232] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. A communication method characterized by comprising: The method comprises: receiving first information, the first information being used to indicate a manner of sending channel state information (CSI) as a sub-band CSI reporting manner; sending at least two CSIs, wherein the at least two CSIs are determined according to at least two sub-bands, the at least two CSIs correspond to the at least two sub-bands one by one, and the at least two sub-bands are determined according to a first frequency domain resource and a second frequency domain resource; the first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource.

2. The method of claim 1, wherein, The method further comprises: determining a plurality of sub-bands according to the first frequency domain resource and the second frequency domain resource, wherein the plurality of sub-bands include the at least two sub-bands, and the plurality of sub-bands satisfy one or more of the following conditions: each sub-band is continuous in the frequency domain; each two sub-bands do not overlap in the frequency domain; each sub-band only overlaps with the first frequency domain resource or only overlaps with the second frequency domain resource; a union set of the plurality of sub-bands in the frequency domain is equal to a bandwidth part (BWP); a maximum number of frequency domain units included in each sub-band is N, wherein N is a positive integer; or adjacent two sub-bands including a number of frequency domain units less than N do not overlap with the first frequency domain resource at the same time or do not overlap with the second frequency domain resource at the same time.

3. The method of claim 2, wherein, Determining the plurality of sub-bands according to the first frequency domain resource and the second frequency domain resource comprises: determining a plurality of frequency unit groups, wherein one frequency unit group includes N frequency units, the plurality of frequency unit groups are continuous in the frequency domain, and N is a positive integer; determining that a frequency unit overlapping with the first frequency domain resource in each frequency unit group is at least one sub-band, and / or determining that a frequency unit overlapping with the second frequency domain resource in each frequency unit group is at least one sub-band, to obtain the plurality of sub-bands.

4. The method of claim 2, wherein, Determining the plurality of sub-bands according to the first frequency domain resource and the second frequency domain resource comprises: performing the following operations on the first frequency domain resource and the second frequency domain resource respectively to obtain the plurality of sub-bands: determining a size of a first sub-band according to an index of a starting frequency unit of a target frequency domain resource, a number of frequency units included in the target frequency domain resource, and N, wherein N is a positive integer; determining a size of each sub-band other than the first sub-band and a last sub-band as N; determining a size of the last sub-band according to the index of the starting frequency unit of the target frequency domain resource, the number of frequency units included in the target frequency domain resource, and the size of the first sub-band and the size of the other sub-band; wherein the target frequency domain resource is the first frequency domain resource or the second frequency domain resource.

5. The method according to any one of claims 1 to 4, characterized in that, The method further comprises: receiving second information, the second information being used to indicate the first frequency domain resource and / or the second frequency domain resource.

6. The method according to any one of claims 1 to 5, wherein, The first information is further used to indicate a number of sub-bands, and the number of sub-bands is 20, 21, or 22.

7. The method according to any one of claims 1 to 6, wherein The first information is further used to indicate a set of sub-bands, and the at least two sub-bands are included in the set of sub-bands.

8. The method according to any one of claims 1 to 7, wherein, The CSI includes a precoding matrix indicator (PMI) and / or a channel quality indicator (CQI).

9. A communication method characterized by comprising: The method comprises: The first information is used to indicate a sub-band CSI reporting mode as a manner of sending channel state information (CSI). The method further includes:

10. The method of claim 9, wherein, The method further includes: The method further includes: The method further includes: The method further includes: The method further includes: The method further includes: The method further includes: The method further includes:

11. The method of claim 10, wherein, The method further includes: The method further includes: The method further includes:

12. The method of claim 10, wherein, The method further includes: The method further includes: The method further includes: The method further includes: The method further includes: The method further includes:

13. The method according to any one of claims 9 to 12, wherein, The method further includes: The method further includes:

14. The method according to any one of claims 9 to 13, characterized in that, The method further includes:

15. The method according to any one of claims 9 to 14, wherein, The method further includes:

16. The method of any one of claims 9-15, wherein, The method further includes:

17. 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method further includes: The method further includes: The method further includes: The method further includes receiving first information, the first information being used for indicating a way of sending channel state information (CSI) is a wideband CSI reporting way; sending two CSIs, wherein one of the two CSIs is determined according to a first frequency domain resource, and another of the two CSIs is determined according to a second frequency domain resource; the first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource.

18. The method of claim 17, wherein, The method further comprises: receiving second information, the second information being used for indicating the first frequency domain resource and / or the second frequency domain resource.

19. The method of claim 17 or 18, wherein, The CSI comprises a precoding matrix indicator (PMI) and / or a channel quality indicator (CQI).

20. A method of communication, comprising: comprising: sending first information, the first information being used for indicating a way of sending channel state information (CSI) is a wideband CSI reporting way; receiving two CSIs, wherein one of the two CSIs is determined according to a first frequency domain resource, and another of the two CSIs is determined according to a second frequency domain resource; the first frequency domain resource is a flexible frequency domain resource, and the second frequency domain resource is a downlink frequency domain resource.

21. The method of claim 20, wherein, The method further comprises: sending second information, the second information being used for indicating the first frequency domain resource and / or the second frequency domain resource.

22. The method of claim 20 or 21, wherein, The CSI comprises a precoding matrix indicator (PMI) and / or a channel quality indicator (CQI).

23. A communications device, characterized by comprising units or modules for performing the method according to any one of claims 1-8, or comprising units or modules for performing the method according to any one of claims 9-16, or comprising units or modules for performing the method according to any one of claims 17-19, or comprising units or modules for performing the method according to any one of claims 20-22.

24. A communications device, characterized by comprising a processor for executing computer programs or instructions to implement the method according to any one of claims 1-8, or to implement the method according to any one of claims 9-16, or to implement the method according to any one of claims 17-19, or to implement the method according to any one of claims 20-22.

25. A computer readable storage medium, characterized in that, The computer readable storage medium stores computer programs or instructions, when the computer programs or instructions are executed by a communication device, the method according to any one of claims 1-8 is implemented, or the method according to any one of claims 9-16 is implemented, or the method according to any one of claims 17-19 is implemented, or the method according to any one of claims 20-22 is implemented.

26. A computer program product, characterised in that, The computer program product contains computer programs or instructions, when the computer programs or instructions are executed by a computer, the method according to any one of claims 1-8 is implemented, or the method according to any one of claims 9-16 is implemented, or the method according to any one of claims 17-19 is implemented, or the method according to any one of claims 20-22 is implemented.

27. A chip or chip system, characterized by The chip or chip system comprises a processor for performing the method according to any one of claims 1-8, or performing the method according to any one of claims 9-16, or performing the method according to any one of claims 17-19, or performing the method according to any one of claims 20-22.

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