Communication method and apparatus, and terminal device and network device

Abstract

The present application relates to the technical field of communications. Disclosed are a communication method and apparatus, and a terminal device and a network device. The method comprises: a terminal device or a network device performing communication on a first resource by means of a first channel, wherein the first resource occupies one or more time slots in a time domain, and the first resource comprises SBFD symbols and / or non-SBFD symbols in the time domain. It can be seen that since the types of symbols of a first resource in a time domain are SBFD symbols and / or non-SBFD symbols, for a scenario in which SBFD is introduced into a TDD system, the present application can enable a terminal device or a network device to perform communication on the SBFD symbols and / or the non-SBFD symbols, wherein when communication is performed only on the SBFD symbols or the non-SBFD symbols, scheduling parameters and transmission and reception processing can be simplified; alternatively, when communication is performed on the SBFD symbols and the non-SBFD symbols, signal / data transmission can be completed as soon as possible, thereby reducing the transmission delay.

Description

Communication method and apparatus, terminal device, and network device

[0001] The present application claims priority from the Chinese patent application No. 202410620932.X filed on May 18, 2024, and entitled "Communication method and apparatus, terminal device, and network device", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication technology, and in particular to a communication method and apparatus, a terminal device, and a network device. BACKGROUND

[0003] In a time division duplexing (TDD) system, the transmission direction of all frequency domain resources of a TDD carrier at the same time needs to be the same, that is, both uplink or downlink, which also leads to that the uplink and downlink on a TDD carrier are time-multiplexed, and the uplink and downlink time slot ratio is relatively fixed. In addition, with the diversification of services, especially considering the service requirements of vertical industries, there are certain differences in the demand for uplink and downlink transmission of different services, so that the fixed uplink and downlink time slot ratio cannot simultaneously meet the requirements of different services.

[0004] In order to avoid the deficiencies caused by the relatively fixed uplink and downlink time slot ratio as much as possible, and considering the implementation complexity of the network device, the 3rd Generation Partnership Project (3GPP) is discussing subband full duplex (SBFD), that is, non-overlapping uplink subbands and downlink subbands are divided on the frequency domain of the same TDD carrier, so as to realize that the network device simultaneously supports uplink transmission and downlink transmission, and improves the spectrum utilization and flexibility. SUMMARY

[0005] The present application provides a communication method and apparatus, a terminal device, and a network device, which realize multi-slot communication in the scenario of introducing SBFD in a TDD system.

[0006] In a first aspect, the present application provides a communication method, comprising:

[0007] communicating through a first channel on a first resource, wherein the first resource occupies one or more time slots in the time domain;

[0008] The first resource is an SBFD symbol in the time domain, or the first resource is a non-SBFD symbol in the time domain, or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

[0009] It can be seen that, for the scenario of introducing SBFD in the TDD system, if the first resource is an SBFD symbol in the time domain, it indicates that the type of the symbol of the first resource in the time domain is an SBFD symbol, thereby realizing that the terminal device communicates only on the SBFD symbol, so that the terminal device can realize uplink transmission or downlink transmission through the SBFD symbol. Since the frequency domain resource of the SBFD symbol contains an uplink subband and a downlink subband, the SBFD symbol can support uplink transmission and downlink transmission, thereby facilitating improvement of spectrum utilization and flexibility. In addition, compared with the case of using multiple symbol types, different symbol types have different frequency domain resources, transmission parameters (such as power control), and TCI, and only communicating on the SBFD symbol type can simplify scheduling parameters and transmission and reception processing. Or,

[0010] For the scenario of introducing SBFD in the TDD system, if the first resource is a non-SBFD symbol in the time domain, it indicates that the type of the symbol of the first resource in the time domain is a non-SBFD symbol, thereby realizing that the terminal device communicates only on the non-SBFD symbol. Since the non-SBFD symbol is in the uplink direction or the downlink direction, the non-SBFD symbol can support uplink transmission or downlink transmission, thereby enabling the terminal device to realize uplink transmission or downlink transmission through the non-SBFD symbol. In addition, compared with the case of using multiple symbol types, different symbol types have different frequency domain resources, transmission parameters (such as power control), and TCI, and only communicating on the non-SBFD symbol type can simplify scheduling parameters and transmission and reception processing. Or,

[0011] For the scenario of introducing SBFD in the TDD system, if the first resource is an SBFD symbol and a non-SBFD symbol in the time domain, it indicates that the type of the symbol of the first resource in the time domain is an SBFD symbol and a non-SBFD symbol, thereby realizing that the terminal device communicates on the SBFD symbol and the non-SBFD symbol, so that the terminal device realizes uplink transmission or downlink transmission on the SBFD symbol and the non-SBFD symbol. In addition, communicating on the SBFD symbol and the non-SBFD symbol can complete signal / data transmission as soon as possible and reduce transmission delay.

[0012] Optionally, the method further includes:

[0013] receiving first information, the first information indicating the type of the symbol of the first resource in the time domain.

[0014] It can be seen that, since the first information can be sent by the network device, the type of the symbol of the first resource in the time domain is directly indicated by the network through the first information.

[0015] Optionally, the communication is associated with the type of the symbol of the first resource in the time domain; or,

[0016] The signal used for the communication is associated with the type of the symbol of the first resource in the time domain.

[0017] It can be seen that, the present application can introduce an association relationship between the communication and the type of the symbol of the first resource in the time domain, or the present application can establish an association relationship between the signal used for the communication and the type of the symbol of the first resource in the time domain, so as to determine the type of the symbol of the first resource in the time domain according to the association relationship. The association relationship can be network configuration, pre-configuration or standard protocol specification.

[0018] Optionally, the communication on the first resource through the first channel comprises:

[0019] The communication on the first resource through the first channel is based on a first transmission configuration indication (TCI).

[0020] It can be seen that, the present application can realize the communication in the scenario of introducing SBFD in a TDD system according to the first TCI, the first resource and the first information.

[0021] Optionally, the first TCI is associated with the type of the symbol of the first resource in the time domain.

[0022] It can be seen that, the present application can introduce an association relationship between the first TCI and the type of the symbol of the first resource in the time domain, so as to determine the type of the symbol of the first resource in the time domain according to the association relationship. The association relationship can be network configuration, pre-configuration or standard protocol specification.

[0023] Optionally, the first TCI is one of a first candidate TCI for the communication or a second candidate TCI for the communication, the first candidate TCI is associated with a non-SBFD symbol of the first resource in the time domain, and the second candidate TCI is associated with an SBFD symbol of the first resource in the time domain.

[0024] Optionally, the method further comprises: receiving second information, the second information indicating that the first TCI is associated with the type of the symbol of the first resource in the time domain.

[0025] It can be seen that the second information can be sent by the network device, so that the network directly indicates the association between the first TCI and the type of symbol in the time domain of the first resource through the second information.

[0026] Optionally, the second information further indicates the first TCI.

[0027] It can be seen that the network indicates the first TCI and the association between the first TCI and the type of symbol in the time domain of the first resource through the second information.

[0028] Optionally, the second information indicates that at least one TCI is associated with the type of symbol in the time domain of the resource used for communication, and the at least one TCI includes the first TCI.

[0029] It can be seen that the network indicates the association between the first TCI and the type of symbol in the time domain of the first resource through the second information.

[0030] Optionally, the method further comprises:

[0031] Receiving first activation information, the first activation information being used to activate the first TCI.

[0032] It can be seen that when each TCI in the at least one TCI is associated with the type of symbol in the time domain of the resource used for communication, and the at least one TCI includes the first TCI, the network can activate the first TCI through the first activation information, so as to determine the type of symbol in the time domain of the first resource associated with the first TCI through the activation of the first TCI.

[0033] Optionally, the communication on the first resource through the first channel comprises:

[0034] Respectively communicating with a plurality of transceiver points (TRPs) on the first resource through the first channel.

[0035] It can be seen that the embodiment can realize communication with a plurality of TRPs in the scenario of introducing SBFD in a TDD system.

[0036] Optionally, the communication on the first resource through the first channel with the plurality of TRPs respectively comprises:

[0037] Based on the first TCI, communication is performed on the first resource through the first channel with a first TRP, and based on the second TCI, communication is performed on the first resource through the first channel with a second TRP.

[0038] It can be seen that the application can realize communication on the first resource through the first channel with the first TRP and the second TRP respectively based on the first TCI and the second TCI.

[0039] Optionally, the first TCI and the second TCI are associated with the type of symbol in the time domain of the first resource.

[0040] It can be seen that the application can establish the association between the first TCI and the second TCI and the type of symbol in the time domain of the first resource, so as to determine the type of symbol in the time domain of the first resource according to the association.

[0041] Optionally, the method further comprises:

[0042] receiving third information, the third information indicating that the first TCI and the second TCI are associated with the type of symbol in the time domain of the first resource.

[0043] It can be seen that since the third information can be sent by the network device, the network directly indicates the association between the first TCI and the second TCI and the type of symbol in the time domain of the first resource through the third information.

[0044] Optionally, the third information indicates that a plurality of TCIs are associated with the type of symbol in the time domain of the resource for communication, and the plurality of TCIs include the first TCI and the second TCI.

[0045] It can be seen that the fourth information is used to indicate that the first TCI and the second TCI are associated with the type of symbol in the time domain of the resource for communication.

[0046] Optionally, the method further comprises:

[0047] receiving second activation information, the second activation information being used to activate the first TCI and the second TCI.

[0048] It can be seen that when each TCI in the plurality of TCIs is associated with the type of symbol in the time domain of the resource for communication, and the plurality of TCIs include the first TCI and the second TCI, the network can activate the first TCI and the second TCI through the second activation information, so as to determine the type of symbol in the time domain of the first resource associated with the first TCI and the second TCI by activating the first TCI and the second TCI.

[0049] The second aspect is a communication method of the application, comprising:

[0050] communicating through a first channel on a first resource, wherein the first resource occupies one or more time slots in the time domain;

[0051] the first resource is a sub-band full duplex (SBFD) symbol in the time domain, or the first resource is a non-sub-band full duplex (non-SBFD) symbol in the time domain, or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

[0052] It can be seen that, for the scenario of introducing SBFD for the TDD system, if the first resource is an SBFD symbol in the time domain, it indicates that the type of the symbol of the first resource in the time domain is an SBFD symbol, so as to realize that the network device communicates only on the SBFD symbol. Since the frequency domain resource of the SBFD symbol contains an uplink subband and a downlink subband, the SBFD symbol can support uplink transmission and downlink transmission, so that the network device can realize uplink transmission and downlink transmission through the SBFD symbol, thereby facilitating improvement of spectrum utilization and flexibility. In addition, compared with the case of using multiple symbol types, since the frequency domain resources, transmission parameters (such as power control), and TCIs in different symbol types are different, communicating only on the SBFD symbol of one symbol type can simplify scheduling parameters and transmission and reception processing. Or,

[0053] For the scenario of introducing SBFD for the TDD system, if the first resource is a non-SBFD symbol in the time domain, it indicates that the type of the symbol of the first resource in the time domain is a non-SBFD symbol, so as to realize that the network device communicates only on the non-SBFD symbol. Since the non-SBFD symbol is in the uplink direction or the downlink direction, the non-SBFD symbol can support uplink transmission or downlink transmission, so that the network device can realize uplink transmission or downlink transmission through the non-SBFD symbol. In addition, compared with the case of using multiple symbol types, since the frequency domain resources, transmission parameters (such as power control), and TCIs in different symbol types are different, communicating only on the non-SBFD symbol of one symbol type can simplify scheduling parameters and transmission and reception processing. Or,

[0054] For the scenario of introducing SBFD for the TDD system, if the first resource is an SBFD symbol and a non-SBFD symbol in the time domain, it indicates that the type of the symbol of the first resource in the time domain is an SBFD symbol and a non-SBFD symbol, so as to realize that the network device communicates on the SBFD symbol and the non-SBFD symbol, so that the network device realizes uplink transmission and / or downlink transmission on the SBFD symbol and the non-SBFD symbol. In addition, communicating on the SBFD symbol and the non-SBFD symbol can complete transmission of signals / data as soon as possible and reduce transmission delay.

[0055] Optionally, the method further includes:

[0056] sending first information, the first information indicating the type of the symbol of the first resource in the time domain.

[0057] It can be seen that, since the first information can be sent by the network device, the type of the symbol of the first resource in the time domain is directly indicated by the network through the first information.

[0058] Optionally, the communication is associated with a type of symbol in a time domain of the first resource; or

[0059] The signal for the communication is associated with the type of symbol in the time domain of the first resource.

[0060] It can be seen that the present application can introduce an association between the communication and the type of symbol in the time domain of the first resource, or the present application can establish an association between the signal for the communication and the type of symbol in the time domain of the first resource, so as to determine the type of symbol in the time domain of the first resource according to the association. The association can be network configuration, pre-configuration or standard protocol specification.

[0061] Optionally, the communication on the first resource through the first channel comprises:

[0062] The communication on the first resource through the first channel is based on a first transmission configuration indication (TCI).

[0063] It can be seen that the present application can realize communication in a scenario of introducing SBFD in a TDD system according to the first TCI, the first resource and the first information.

[0064] Optionally, the first TCI is associated with the type of symbol in the time domain of the first resource.

[0065] It can be seen that the present application can introduce an association between the first TCI and the type of symbol in the time domain of the first resource, so as to determine the type of symbol in the time domain of the first resource according to the association. The association can be network configuration, pre-configuration or standard protocol specification.

[0066] Optionally, the method further comprises: sending second information, the second information indicating that the first TCI is associated with the type of symbol in the time domain of the first resource.

[0067] It can be seen that the second information can be sent by a network device, so that the network directly indicates the association between the first TCI and the type of symbol in the time domain of the first resource through the second information.

[0068] Optionally, the second information further indicates the first TCI.

[0069] It can be seen that the network indicates the first TCI and the association between the first TCI and the type of symbol in the time domain of the first resource through the second information.

[0070] Optionally, the second information indicates that at least one TCI is associated with the type of symbol in the time domain of the resource for communication, and the at least one TCI comprises the first TCI.

[0071] It can be seen that the second information realizes that the network indicates the association relationship between the first TCI and the type of the symbol in the time domain of the first resource.

[0072] Optionally, the method further includes:

[0073] The first activation information is used to activate the first TCI.

[0074] It can be seen that when each TCI in the at least one TCI is associated with the type of the symbol in the time domain of the resource used for communication, and the at least one TCI includes the first TCI, the network can activate the first TCI through the first activation information, so as to determine the type of the symbol in the time slot in the time domain of the first resource associated with the first TCI by activating the first TCI.

[0075] In a third aspect, a communication device is provided, and the communication device includes:

[0076] The communication unit is configured to communicate through the first channel on the first resource, where the first resource occupies one or more time slots in the time domain.

[0077] The first resource is a sub-band full duplex (SBFD) symbol in the time domain, or the first resource is a non-sub-band full duplex (non-SBFD) symbol in the time domain, or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

[0078] In a fourth aspect, a communication device is provided, and the communication device includes:

[0079] The communication unit is configured to communicate through the first channel on the first resource, where the first resource occupies one or more time slots in the time domain.

[0080] The first resource is a sub-band full duplex (SBFD) symbol in the time domain, or the first resource is a non-sub-band full duplex (non-SBFD) symbol in the time domain, or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

[0081] In a fifth aspect, the steps in the method designed in the first aspect are applied to a terminal device.

[0082] In a sixth aspect, the steps in the method designed in the second aspect are applied to a network device.

[0083] In a seventh aspect, a terminal device is provided, and the terminal device includes a processor, a memory, and a computer program or instructions stored in the memory, where the processor executes the computer program or instructions to implement the steps in the method designed in the first aspect.

[0084] In an eighth aspect, a network device of the present application includes a processor, a memory, and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to implement the steps in the method designed in the second aspect.

[0085] In a ninth aspect, a chip of the present application includes a processor, wherein the processor executes the steps in the method designed in the first aspect or the second aspect.

[0086] In a tenth aspect, a chip module of the present application includes a transceiver assembly and a chip, and the chip includes a processor, wherein the processor executes the steps in the method designed in the first aspect or the second aspect.

[0087] In an eleventh aspect, a computer readable storage medium of the present application stores a computer program or instructions, and the computer program or instructions are executed to implement the steps in the method designed in the first aspect or the second aspect.

[0088] In a twelfth aspect, a computer program product of the present application includes a computer program or instructions, and the computer program or instructions are executed to implement the steps in the method designed in the first aspect or the second aspect. For example, the computer program product can be a software package.

[0089] The beneficial effects brought by the technical solutions of the third aspect to the twelfth aspect can be referred to the technical effects brought by the technical solutions of the first aspect or the second aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0090] FIG. 1 is a schematic diagram of an architecture of a communication system according to an embodiment of the present application;

[0091] FIG. 2 is a schematic diagram of a flow of a communication method according to an embodiment of the present application;

[0092] FIG. 3 is a schematic diagram of a flow of another communication method according to an embodiment of the present application;

[0093] FIG. 4 is a schematic diagram of a structure of a MAC CE according to an embodiment of the present application;

[0094] FIG. 5 is a schematic diagram of a flow of another communication method according to an embodiment of the present application;

[0095] FIG. 6 is a schematic diagram of a TCI of a TCI codepoint under a single TPR according to an embodiment of the present application;

[0096] FIGS. 7 to 10 are schematic diagrams of structures of MAC CEs according to embodiments of the present application;

[0097] FIG. 11 is a flow diagram of another communication method according to an embodiment of the present application;

[0098] FIG. 12 is a flow diagram of another communication method according to an embodiment of the present application;

[0099] FIG. 13 is a structure diagram of a MAC CE according to an embodiment of the present application;

[0100] FIG. 14 is a flow diagram of another communication method according to an embodiment of the present application;

[0101] FIG. 15 is a diagram of a TCI of a TCI codepoint under multiple TPRs according to an embodiment of the present application;

[0102] FIG. 16 is a block diagram of functional units of a communication apparatus according to an embodiment of the present application;

[0103] FIG. 17 is a block diagram of functional units of another communication apparatus according to an embodiment of the present application;

[0104] FIG. 18 is a structure diagram of a terminal device according to an embodiment of the present application;

[0105] FIG. 19 is a structure diagram of a network device according to an embodiment of the present application. DETAILED DESCRIPTION

[0106] It should be understood that the terms “first”, “second”, etc. involved in the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms “include” and “have” and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, software, product or device including a series of steps or units is not limited to the listed steps or units, but can also include steps or units not listed, or can also include other steps or units inherent to the process, method, product or device.

[0107] The “embodiment” involved in the embodiments of the present application means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0108] “at least one” or “at least one” in the embodiments of the present application means one or more, and multiple means two or more.

[0109] The "and / or" in the embodiments of the present application describes the association relationship of the associated objects, and indicates that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. Wherein, A and B can be singular or plural. The character " / " can represent that the associated objects before and after it are in an "or" relationship.

[0110] The "at least one" or similar expressions in the embodiments of the present application refer to any combination of these items, including any combination of single item or multiple items. For example, at least one of a, b or c can represent the following seven cases: a, b, c, a and b, a and c, b and c, a, b and c. Wherein, each of a, b and c can be an element or a set containing one or more elements.

[0111] The "of", "corresponding", "corresponding", "associated", "mapped" in the embodiments of the present application can be used interchangeably. It should be pointed out that when the distinction is not emphasized, the concepts or meanings to be expressed are consistent.

[0112] The "network" in the embodiments of the present application can be expressed as the same concept as "system", and the communication system is the communication network.

[0113] The "connection" in the embodiments of the present application refers to various connection modes such as direct connection or indirect connection to realize communication between devices, which is not limited specifically.

[0114] The communication system of the embodiments of the present application is specifically introduced as follows.

[0115] The technical solutions of the embodiments of the present application can be applied to various wireless communication systems, for example: a long term evolution (LTE) system, an advanced long term evolution (LTE-A) system, a New Radio (NR) system, an evolved system of the NR system, an LTE-based access to unlicensed spectrum (LTE-U) system, an NR-based access to unlicensed spectrum (NR-U) system, a non-terrestrial network (NTN) system, a universal mobile telecommunication system (UMTS), a 6th-Generation (6G) communication system, or other communication systems, and the like.

[0116] It should be noted that the number of connections supported by the conventional communication system is limited and easy to implement. With the development of communication technology, the communication system of the present application can not only support the conventional communication system, but also support, for example, device to device (D2D) communication, machine to machine (M2M) communication, machine type communication (MTC), vehicle to vehicle (V2V) communication, vehicle to everything (V2X) communication, narrow band internet of things (NB-IoT) communication, and the like. Therefore, the technical solutions of the embodiments of the present application can also be applied to the above communication systems.

[0117] For example, the embodiments of the present application can be applied to a beamforming / beamforming (beamforming), carrier aggregation (CA), dual connectivity (DC), or standalone (SA) deployment scenario, and the like.

[0118] For another example, the embodiments of the present application can be applied to a communication scenario of unlicensed spectrum. In the embodiments of the present application, the unlicensed spectrum can also be considered as a shared spectrum. Alternatively, the embodiments of the present application can also be applied to a licensed spectrum. The licensed spectrum can also be considered as a non-shared spectrum.

[0119] Optionally, the technical solutions of the embodiments of the present application can be applied to an NTN system, for example, a satellite communication system. For the satellite communication system, the network device is usually implemented to communicate with the ground terminal device through a satellite.

[0120] For example, the network architecture of a communication system according to an embodiment of the present application can be referred to FIG. 1. As shown in FIG. 1, the communication system 10 can include a network device 110 and a terminal device 120. The terminal device 120 can communicate with the network device 110 in a wireless manner. In addition, the communication system 10 can also include a server or other devices. For example, the communication system 10 can include other network devices in addition to the network device 110. For another example, the communication system 10 can include other terminal devices in addition to the terminal device 120.

[0121] Of course, FIG. 1 is only an example of the network architecture of a communication system, and does not limit the network architecture of the communication system according to the embodiments of the present application.

[0122]

Terminal device

[0123] The terminal device can be a device with transceiving function, and can also be referred to as a terminal, a user equipment (UE), a remote terminal device, a relay device, an access terminal device, a user unit, a user station, a mobile station, a mobile station, a remote station, a mobile device, a user terminal device, a smart terminal device, a wireless communication device, a user agent or a user apparatus. It should be noted that the relay device is a terminal device capable of providing relay forwarding service for other terminal devices (including remote terminal devices).

[0124] For example, the terminal device can be a mobile phone, a tablet computer (Pad), a computer with wireless transceiving function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in unmanned automatic driving, a wireless terminal device in remote medical treatment, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city or a wireless terminal device in smart home, etc.

[0125] For example, the terminal device can be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device having wireless communication function, a computing device, or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a next-generation communication system (for example, an NR communication system, a 6G communication system), or a terminal device in a future evolved public land mobile network (PLMN), and the like, without specific limitation.

[0126] Optionally, the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable, or in-vehicle; can be deployed on water (such as a ship, etc.); can be deployed in the air (such as an airplane, a balloon, and a satellite, etc.).

[0127] Optionally, the terminal device can include a device with wireless communication function, such as a chip system, a chip, or a chip module. For example, the chip system can include a chip and can also include other discrete devices.

[0128] Optionally, the terminal device of the embodiments of the present application can be a chip, a chip module, a device, a unit, and the like, without specific limitation.

[0129]

Network device

[0130] The network device can be a device with transceiver function, which can be used for communication with the terminal device.

[0131] Optionally, the network device can be responsible for radio resource management (RRM), quality of service (QoS) management, data compression and encryption, data transmission, and the like.

[0132] Optionally, the network device can include a base station (BS) in a communication system or a device deployed in a radio access network (RAN) for providing wireless communication function, that is, the network device can include a device in the RAN.

[0133] For example, the device in the RAN can include an evolutional node B (eNB or eNodeB) in an LTE communication system, a next generation evolved node B (ng-eNB) in an NR communication system, a next generation node B (gNB) in an NR communication system, a master node (MN) in a dual connectivity architecture, a secondary node (SN) or a second node in a dual connectivity architecture, etc., without specific limitation thereto.

[0134] Optionally, the network device can also be an access point (AP) in a WLAN, a relay station, a communication device in a future evolved PLMN network, a communication device in an NTN network, etc.

[0135] Optionally, the network device can include a device with a wireless communication function for providing a terminal device, such as a chip system, a chip, a chip module. For example, the chip system can include a chip, or can include other discrete devices.

[0136] Optionally, the network device can be a transmission and reception point (TRP).

[0137] Optionally, the network device can communicate with an Internet Protocol (IP) network. For example, the Internet, a private IP network, or other data network, etc.

[0138] Optionally, the network device can include one standalone node to implement the functions of the above base station, or can include two or more standalone nodes to implement the functions of the above base station. For example, the network device includes a centralized unit (CU) and a distributed unit (DU), such as gNB-CU and gNB-DU. Further, in other embodiments, the network device can also include an active antenna unit (AAU). Among them, the CU implements part of the functions of the network device, and the DU implements another part of the functions of the network device. For example, the CU is responsible for processing non-real-time protocols and services, implementing the functions of the radio resource control (RRC) layer, the service data adaptation protocol (SDAP) layer, and the packet data convergence protocol (PDCP) layer. The DU is responsible for processing the physical layer protocol and real-time service, and implements the functions of the radio link control (RLC) layer, the medium access control (MAC) layer, and the physical (PHY) layer. In addition, the AAU can implement part of the physical layer processing function, the radio frequency processing, and the related function of the active antenna. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this network deployment, the high-layer signaling (such as RRC signaling) can be considered as generated by the CU, transmitted by the DU, or transmitted by the DU and the AAU together. It can be understood that the network device can include at least one of the CU, the DU, and the AAU. In addition, the CU can be divided into a RAN device, or the CU can also be divided into a core network device, which is not limited specifically.

[0139] Optionally, the network device can be any site in a multi-site coherent joint transmission (CJT) with the terminal device, or other sites outside the multi-site, or other network devices in network communication with the terminal device, without specific limitation. The multi-site coherent joint transmission can be joint coherent transmission of multiple sites, or different data belonging to the same physical downlink shared channel (PDSCH) is transmitted to the terminal device from different sites, or multiple sites are virtually formed into one site for transmission, or other cooperative transmission. The sites in the multi-site coherent joint transmission can be remote radio heads (RRHs), transmission and reception points (TRPs), network devices, etc., without specific limitation.

[0140] Optionally, the network device can also be any site in a multi-site non-coherent joint transmission (NCJT) with the terminal device, or other sites outside the multi-site, or other network devices in network communication with the terminal device, without specific limitation. The multi-site non-coherent joint transmission can be joint non-coherent transmission of multiple sites, or different data belonging to the same PDSCH is transmitted to the terminal device from different sites, or different data belonging to the same PDSCH is transmitted to the terminal device from different sites, or other non-cooperative transmission. The sites in the multi-site non-coherent joint transmission can be RRHs, TRPs, network devices, etc., without specific limitation.

[0141] Optionally, the network device can serve a cell, and the terminal device in the cell can communicate with the network device through transmission resources (such as spectrum resources). The cell can be a macro cell, a small cell, a metro cell, a micro cell, a pico cell, a femto cell, etc.

[0142] Optionally, the network device described in the embodiments of the present application can be a chip, a chip module, an apparatus, a unit, etc., without specific limitation.

[0143] The communication system is described above. The related content involved in the embodiments is described below.

[0144]

Beam

[0145] A beam is a kind of communication resource. A beam can be a wide beam, or a narrow beam, or other types of beams. Beamforming technology can be referred to as beamforming technology or other technical means. Beamforming technology can be specific to digital beamforming technology, analog beamforming technology, hybrid digital / analog beamforming technology. Different beams can be considered as different resources. The same information or different information can be transmitted through different beams. Alternatively, multiple beams with the same or similar communication characteristics can be considered as one beam. One beam can include one or more antenna ports for transmitting data channels, control channels, and sounding signals, etc. For example, a transmit beam can refer to the distribution of signal strength in different directions in space after the signal is transmitted by the antenna, and a receive beam can refer to the distribution of signal strength in different directions in space after the wireless signal is received by the antenna. It can be understood that one or more antenna ports forming a beam can also be regarded as an antenna port set. A beam can be embodied in a protocol as a spatial filter.

[0146] The information of a beam can be identified (ID) by index information. Alternatively, the index information can correspond to the resource identification of the configured terminal device, such as the ID or resource of the configured channel state information-reference signal (CSI-RS), or the ID or resource of the configured uplink sounding reference signal (SRS). Alternatively, the index information can also be index information carried by a signal or channel carried by a beam, such as the index information of the synchronization signal or broadcast channel transmitted by the beam.

[0147] Alternatively, the identification of the information of the beam includes the absolute index of the beam, the relative index of the beam, the logical index of the beam, the index of the antenna port corresponding to the beam, the index of the antenna port group corresponding to the beam, the time index of the downlink synchronization signal block, the beam pair link (BPL) information corresponding to the beam, the transmission parameter (Tx parameter) corresponding to the beam, the reception parameter (Rx parameter) corresponding to the beam, the transmission weight corresponding to the beam, the weight vector, the weight matrix, the reception weight corresponding to the beam, or the index thereof, the transmission codebook corresponding to the beam, the reception codebook corresponding to the beam, or the index thereof.

[0148] The beam in the new radio (NR) protocol can be a spatial domain filter, or a spatial filter, or a spatial domain parameter, a spatial parameter, a spatial domain setting, a spatial setting, quasi colocation (QCL) information, a QCL assumption, or a QCL indication, etc. The beam can be indicated by a transmission configuration indication state (TCI state) parameter, or a spatial relation parameter. Therefore, in the present embodiment, the beam can be replaced by a spatial domain filter, a spatial filter, a spatial domain parameter, a spatial parameter, a spatial domain setting, a spatial setting, QCL information, a QCL assumption, a QCL indication, a TCI state, or a spatial relation, etc. The above terms are also equivalent to each other. The beam can also be replaced by other terms representing the beam, which are not limited in the present application.

[0149] The beam for transmitting a signal can be referred to as a transmission beam (Tx beam), or a spatial domain transmission filter, a spatial transmission filter, a spatial domain transmission parameter or a spatial transmission parameter, a spatial domain transmission setting or a spatial transmission setting. The downlink transmission beam can be indicated by a TCI state.

[0150] A beam used for receiving a signal can be referred to as a reception beam (Rx beam), a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter or a spatial reception parameter, a spatial domain reception setting or a spatial reception setting. An uplink transmission beam can be indicated by a spatial relation, or an uplink TCI state, or an SRS resource (indicating the transmission beam to use for the SRS). Thus the uplink beam can also be replaced by an SRS resource.

[0151]

legacy TCI state

[0152] In a communication system, which beam is used by a terminal device for uplink transmission or which beam is used by the terminal device for downlink reception can be indicated by a network device. For each physical channel or physical signal, the network device can indicate the terminal device how to receive a physical downlink channel or a physical downlink signal and how to transmit a physical uplink channel or a physical uplink signal through different signaling. The beam indication can be implemented through a TCI state. That is, the receiving parameters of a physical downlink channel or a downlink signal can be indicated through a TCI state, and the transmitting parameters of a physical uplink channel or an uplink signal can be indicated through a TCI state. The physical downlink channel can be, for example, a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH), and the downlink signal can be, for example, a de-modulation reference signal (DMRS) or a synchronization signaling block (SSB). The physical uplink channel can be, for example, a physical uplink control channel (PUCCH) or a physical downlink shared channel (PUSCH), and the uplink signal can be, for example, a sounding reference signal (SRS), a phase noise tracking reference signal (PTRS), or an uplink positioning reference signal.

[0153] In some possible examples, the network device can use a three-level signaling structure of RRC signaling + medium access control-control element (MAC-CE) + downlink control information (DCI) for beam indication of an uplink channel or a downlink channel. Taking a PDSCH as an example of the downlink channel, the network device uses RRC signaling to configure a plurality of TCI states, then uses a MAC-CE to activate a plurality of TCI states from the plurality of TCI states, and finally uses DCI to indicate a TCI state from the activated plurality of TCI states, where the TCI state indicated by the DCI is used for a current PDSCH transmission. For example, the network device can use RRC signaling to configure up to 128 TCI states, then use a MAC-CE to activate up to 8 TCI states (as the standard evolves, the number of activated TCI states can be greater than 8), and finally use a TCI field in the DCI to indicate a TCI state from the activated TCI states for a current PDSCH transmission.

[0154] Taking a periodic CSI-RS as an example of the downlink signal, the network device uses a qcl-InfoPeriodicCSI-RS field in RRC signaling to configure a TCI state of the CSI-RS resource.

[0155] For example, a TCI state configured by RRC signaling can include at least one of a TCI state identifier (ID), a quasi co-location (QCL) type, or QCL information (QCL-Info) of the QCL type. The QCL type can be one of the following:

[0156] QCL type A (typeA): used to indicate a delay, a Doppler shift, a delay spread, and a Doppler spread, that is, QCL typeA is used to indicate time-frequency offset information;

[0157] QCL type (typeB): used to indicate a Doppler shift and a Doppler spread;

[0158] QCL type (typeC): used to indicate a delay and a Doppler shift;

[0159] QCL type (typeD): used to indicate a beam.

[0160] It can be understood that if the QCL type of the TCI state is QCL typeA, QCL typeB or QCL typeC, it means that the TCI state is used to indicate time-frequency offset information and the like, and does not include spatial domain information, and is generally used to assist the terminal device in data reception demodulation. If the QCL type of the TCI state is QCL typeD, it means that the TCI state is used to indicate a beam. It should be noted that in the case of QCL typeD of the TCI state, the TCI state and the beam can be replaced with each other. The QCL type of the TCI state involved below is QCL typeD by default.

[0161] The QCL information can include a reference signal field, and the value of the reference signal field can be an SSB index (SSB index) or a CSI-RS resource identifier (CSI-RS resource ID).

[0162] For example, when the value of the reference signal field in the TCI state is a non-zero power CSI-RS resource identifier, it means that the network device instructs the terminal device to receive the physical downlink channel using the reception parameter of the CSI-RS resource corresponding to the non-zero power CSI-RS resource identifier. For example, if the reference signal of QCL typeA in the TCI state of PDSCH includes the identifier / index of the CSI-RS resource, the terminal device receives PDSCH using the time-frequency offset information of the CSI-RS resource. For another example, if the reference signal of QCL typeD in the TCI state of PDSCH includes the identifier / index of the CSI-RS resource, the terminal device receives PDSCH using the reception beam of the CSI-RS resource.

[0163] It should be noted that in the case of QCL typeD of the TCI state, the TCI state and the beam can be replaced with each other. The QCL type of the TCI state involved below can be QCL typeD by default.

[0164]

Unified TCI state

[0165] In the standardization process of 3GPP NR R17, a unified TCI state is designed. The unified TCI state can be used for uplink and downlink beam indication in millimeter wave frequency band (i.e. FR2) beam management, and can be applied to almost all physical layer channels and reference signals. For example, PDCCH, PDSCH and CSI-RS in the downlink share the same downlink transmission beam of the network device; PUCCH, PUSCH and SRS in the uplink use the same uplink transmission beam.

[0166] The unified TCI state can include a joint TCI state, which can be used to indicate the QCL parameters of uplink and downlink, and joint indication of uplink and downlink can be performed. Alternatively, the unified TCI state can include a separate DL TCI state and a separate UL TCI state. Among them, the separate DL TCI state can be used to indicate the QCL parameters of downlink, and the separate UL TCI state can be used to indicate the QCL parameters of uplink.

[0167] For example, if the network device indicates a separate DL TCI state for downlink, the separate DL TCI state can be used for PDSCH or PDSCH DMRS, PDCCH or PDCCH DMRS, and some downlink reference signals of the terminal. If the network device indicates a separate UL TCI state for uplink, the separate UL TCI state can be used for PUSCH or PUSCH DMRS, PUCCH or PUCCH DMRS, and some uplink reference signals of the terminal device. If the network device indicates a joint TCI state for uplink and downlink, the joint TCI state can be used for PDSCH or PDSCH DMRS, PDCCH or PDCCH DMRS, some downlink reference signals, PUSCH or PUSCH DMRS, PUCCH or PUCCH DMRS, and some uplink reference signals of the terminal device.

[0168] In order to reduce the MAC CE overhead, for the case that the terminal device has multiple serving cells, the multiple serving cells can be configured as at least one component carrier (CC) list, and for the multiple serving cells belonging to one CC list, one MAC CE can be used to activate or update the corresponding TCI state. However, the serving cell can be configured as single transmission reception point (S-TRP) transmission or multi transmission reception point (M-TRP) parameter. For the serving cell of M-TRP transmission, it can be configured based on single-downlink control information (S-DCI) or multi-downlink control information (M-DCI).

[0169]

TDD system introduces SBFD scenarios

[0170] In the scenario of introducing SBFD in a TDD system, the embodiment relates to SBFD symbols and non-SBFD symbols. The SBFD symbol can refer to a symbol performing SBFD operation, and the frequency domain resource of the symbol contains an uplink sub-band and a downlink sub-band. The non-SBFD symbol can refer to a symbol direction being only uplink or downlink.

[0171] Multi-slot communication can refer to occupying multiple continuous or non-continuous time slots in the time domain to perform data / signal / channel transmission. The multi-slot communication can include at least one of multi-slot uplink repeated transmission, multi-slot downlink repeated transmission, multi-slot uplink periodic transmission, multi-slot downlink periodic transmission, multi-slot PUSCH / PDSCH, or multi-slot transmission block (TBoMS) transmission, and the like.

[0172] Multi-slot uplink repeated transmission can refer to occupying multiple continuous or non-continuous time slots in the time domain to perform uplink repeated transmission. The uplink repeated transmission can include at least one of physical uplink shared channel (PUSCH) repeated transmission, physical uplink control channel (PUCCH) repeated transmission, or configured grant PUSCH (CG PUSCH) repeated transmission, and the like.

[0173] Multi-slot downlink repeated transmission can refer to occupying multiple continuous or non-continuous time slots in the time domain to perform downlink repeated transmission. The downlink repeated transmission can include at least one of physical downlink shared channel (PDSCH) repeated transmission, physical downlink control channel (PDCCH) repeated transmission, or semi-persistent scheduling PDSCH (SPS PDSCH) repeated transmission, and the like.

[0174] Multi-slot uplink periodic transmission can refer to occupying multiple continuous or non-continuous time slots in the time domain to perform uplink periodic transmission. The uplink periodic transmission can include at least one of PUSCH periodic transmission, PUCCH periodic transmission, SRS periodic transmission, and the like.

[0175] The multi-slot downlink periodic transmission can refer to occupying multiple continuous or non-continuous slots in the time domain to perform downlink periodic transmission. The downlink periodic transmission can include at least one of PDSCH periodic transmission, PDCCH periodic transmission, CSI-RS periodic transmission, and the like.

[0176] The multi-slot PUSCH / PDSCH can refer to scheduling multiple PUSCH / PDSCH at a time, and the multiple PUSCH / PDSCH occupy multiple continuous or non-continuous slots in the time domain. The PUSCH / PDSCH can include PUSCH demodulation reference signal (DMRS) / PDSCH DMRS.

[0177] The multi-slot communication process in the scenario of introducing SBFD in the TDD system is described in detail.

[0178]

Scheme 1

[0179] In the scheme 1, for the multi-slot communication process in the scenario of introducing SBFD in the TDD system, when the terminal device and the network device need to perform a certain communication (such as multi-slot uplink repeated transmission, multi-slot downlink repeated transmission, multi-slot uplink periodic transmission, multi-slot downlink periodic transmission, multi-slot PUSCH / PUCCH, or multi-slot TBoMS transmission), the terminal device and the network device can determine the resource for the communication.

[0180] The resource for the communication can be in the available resource, which can occupy multiple slots in the time domain, for example, the available resource occupies slot 1, slot 2, slot 3, and slot 4 in the time domain. The communication can be configured, indicated, activated, or scheduled by the network device, for example, the network device sends a DCI to the terminal device, which schedules PDSCH transmission. In addition, the resource for the communication is configured, indicated, or activated by the network device.

[0181] It should be noted that the resource for the communication occupies one or more slots in the time domain. The resource for the communication can be a part of the available resource or the entire available resource. In addition, the slots occupied by the resource for the communication in the time domain can be a part of the slots occupied by the available resource in the time domain or all the slots, or the slots occupied by the resource for the communication in the time domain can be continuous or non-continuous. For example, the resource for the communication occupies slot 1 in the time domain; or the resource for the communication occupies slot 1, slot 3, and slot 5 in the time domain; or the resource for the communication occupies slot 1, slot 2, and slot 3 in the time domain.

[0182] In addition, the type of the symbol in the time domain of the resource used for the communication can be an SBFD symbol, or the type of the symbol in the time domain of the resource used for the communication can be a non-SBFD symbol, or the type of the symbol in the time domain of the resource used for the communication can be an SBFD symbol and a non-SBFD symbol.

[0183] In this way, the terminal device or the network device can perform the communication through the channel on the resource used for the communication, so as to implement multi-slot communication in the scenario where the TDD system introduces SBFD.

[0184] It should be noted that, if the type of the symbol in the time domain of the resource used for the communication is an SBFD symbol, it means that the terminal device or the network device only performs communication on the SBFD symbol, so as to implement multi-slot communication in the scenario where the TDD system introduces SBFD. Since the frequency domain resource of the SBFD symbol contains an uplink sub-band and a downlink sub-band, the SBFD symbol can simultaneously support uplink transmission and downlink transmission, thereby facilitating improvement of spectrum utilization and flexibility. In addition, compared with the case where different symbol types are used and different symbol types have different frequency domain resources, transmission parameters (such as power control), and TCIs, performing multi-slot communication on only one type of symbol (the SBFD symbol) can simplify scheduling parameters and transmission and reception processing. If the type of the symbol in the time domain of the resource used for the communication is a non-SBFD symbol, it means that the terminal device or the network device only performs communication on the non-SBFD symbol, so as to implement multi-slot communication in the scenario where the TDD system introduces SBFD. Since the direction of the non-SBFD symbol is uplink or downlink, the non-SBFD symbol can only support uplink transmission or downlink transmission. In addition, compared with the case where different symbol types are used and different symbol types have different frequency domain resources, transmission parameters (such as power control), and TCIs, performing multi-slot communication on only one type of symbol (the non-SBFD symbol) can simplify scheduling parameters and transmission and reception processing.

[0185] If the type of the symbol in the time domain of the resource used for the communication is an SBFD symbol and a non-SBFD symbol, it means that the terminal device or the network device performs communication on the SBFD symbol and the non-SBFD symbol, so as to implement multi-slot communication in the scenario where the TDD system introduces SBFD, thereby implementing uplink transmission and / or downlink transmission on the SBFD symbol and the non-SBFD symbol. In addition, performing communication on the SBFD symbol and the non-SBFD symbol can complete transmission of signals / data as soon as possible and reduce transmission delay.

[0186] It is worth noting that the terminal device or the network device communicates through a channel on the resource used for the communication. For example, the terminal device transmits signals / data through an uplink channel on the resource used for the communication, and the corresponding network device receives the signals / data. Alternatively, the network device transmits signals / data through a downlink channel on the resource used for the communication, and the corresponding terminal device receives the signals / data. In addition, if the communication is multi-slot uplink repeated transmission or multi-slot uplink periodic transmission, the terminal device performs multi-slot uplink repeated transmission or multi-slot uplink periodic transmission on the resource used for the communication. If the communication is multi-slot downlink repeated transmission or multi-slot downlink periodic transmission, the network device performs multi-slot downlink repeated transmission or multi-slot downlink periodic transmission on the resource used for the communication.

[0187] The following takes the resource used for the communication as the first resource as an example to illustrate the process of multi-slot communication in the scenario of introducing SBFD in the TDD system. As shown in FIG. 2, which is a flowchart of a communication method according to an embodiment of the present application, the process includes the following steps:

[0188] S210. Communicate through a first channel on a first resource, wherein the first resource occupies one or more slots in the time domain; the first resource is an SBFD symbol in the time domain, or the first resource is a non-SBFD symbol in the time domain, or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

[0189] It can be seen that if the first resource is an SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is an SBFD symbol, thereby realizing communication of the terminal device or the network device on the SBFD symbol. In this way, the network device can realize uplink transmission and downlink transmission through the SBFD symbol, or the terminal device can realize uplink transmission or downlink transmission through the SBFD symbol. In addition, compared with the case of using multiple symbol types, different frequency domain resources, transmission parameters (such as power control), and TCI exist in different symbol types, and only multi-slot communication on the SBFD symbol can simplify the scheduling parameters and transmission and reception processing.

[0190] If the first resource is a non-SBFD symbol in the time domain, it indicates that the type of the symbol of the first resource in the time domain is a non-SBFD symbol, so as to realize the communication of the terminal device or the network device on the non-SBFD symbol. In this way, the terminal device or the network device can realize uplink transmission or downlink transmission through the non-SBFD symbol. In addition, compared with the case where different symbol types exist in the frequency domain resource, transmission parameters (such as power control), TCI in different symbol types, multi-time slot communication on only one symbol type, namely the non-SBFD symbol, can simplify the scheduling parameters and transmission and reception processing.

[0191] If the first resource is a SBFD symbol and a non-SBFD symbol in the time domain, it indicates that the type of the symbol of the first resource in the time domain is a SBFD symbol and a non-SBFD symbol, so as to realize the communication of the terminal device or the network device on the SBFD symbol and the non-SBFD symbol. In this way, the network device can realize uplink transmission and downlink transmission through the SBFD symbol and the non-SBFD symbol, or the terminal device can realize uplink transmission or downlink transmission through the SBFD symbol and the non-SBFD symbol. In addition, communication on the SBFD symbol and the non-SBFD symbol can complete the transmission of signals / data as soon as possible and reduce the transmission delay.

[0192] It should be noted that, for the communication through the first channel on the first resource, the terminal device can transmit signals / data through the first channel on the first resource, and the corresponding network device receives the signals / data, at this time, the first resource is an uplink resource, and the first channel is an uplink channel; or the network device can transmit signals / data through the first channel on the first resource, and the corresponding terminal device receives the signals / data, at this time, the first resource is a downlink resource, and the first channel is a downlink channel.

[0193] In some possible examples, the embodiment can determine the type of the symbol of the first resource in the time domain in at least one of the following manners:

[0194]

Manner one

[0195] In "manner one", the communication is associated with the type of the symbol of the first resource in the time domain.

[0196] It can be seen that the embodiment can introduce an association relationship between the communication and the type of the symbol of the first resource in the time domain. In this way, since the terminal device or the network device can determine the communication, the terminal device or the network device can determine the type of the symbol of the first resource in the time domain according to the communication and the association relationship, so as to perform the communication on the symbol corresponding to the determined symbol type, thereby realizing the implicit determination of the type of the symbol of the first resource in the time domain.

[0197] In some possible examples, the association of the communication with the type of symbol in the time domain of the first resource can be network configured, pre-configured, or specified by a standard protocol. The network configuration can be understood as being configured by the network device through MAC signaling (such as a MAC CE), RRC signaling, DCI, or system information.

[0198] Taking DCI as an example, the network device sends DCI to the terminal device, and the DCI includes a field indicating that the communication is associated with the type of symbol in the time domain of the first resource. For example, when the communication is PUSCH transmission, the field can indicate that the PUSCH is associated with an SBFD symbol, or the PUSCH is associated with a non-SBFD symbol, or the PUSCH is associated with an SBFD symbol and a non-SBFD symbol.

[0199] In some possible examples, the association of the communication with the type of symbol in the time domain of the first resource includes that a transmission mode of the communication is associated with the type of symbol in the time domain of the first resource.

[0200] In this way, since the terminal device or the network device can determine the transmission mode of the communication, the terminal device or the network device can determine the type of symbol in the time domain of the first resource according to the transmission mode of the communication, so that the terminal device or the network device performs the communication on the first resource according to the transmission mode of the communication.

[0201] It should be noted that in combination with the above content, the transmission mode of the communication can be one of multi-slot periodic transmission, multi-slot repeated transmission, multi-slot PUSCH / PDSCH, or TBoMS transmission. The multi-slot periodic transmission is multi-slot uplink periodic transmission or multi-slot downlink periodic transmission, and the multi-slot repeated transmission is multi-slot uplink repeated transmission or multi-slot downlink repeated transmission. Optionally, the transmission mode of the communication can be network configured, network indicated, or network scheduled. For example, the network device sends DCI to the terminal device, and the DCI schedules PDSCH periodic transmission.

[0202] For multi-slot uplink periodic transmission, the terminal device performs periodic transmission of data / signals on the first resource through an uplink channel, and the corresponding network device receives the data / signals. For multi-slot downlink periodic transmission, the network device performs periodic transmission of data / signals on the first resource through a downlink channel, and the corresponding terminal device receives the data / signals. The multi-slot periodic transmission is associated with the type of symbol in the time domain of the first resource, and the association can be network configured, pre-configured, or specified by a standard protocol.

[0203] For the multi-slot uplink periodic transmission, the multi-slot periodic transmission can be associated with the SBFD symbol, so that the terminal device or the network device performs the periodic transmission of data / signal on the SBFD symbol. Alternatively, the multi-slot periodic transmission can be associated with the non-SBFD symbol, so that the terminal device or the network device performs the periodic transmission of data / signal on the non-SBFD symbol. Alternatively, the multi-slot periodic transmission can be associated with the SBFD symbol and the non-SBFD symbol, so that the terminal device or the network device performs the periodic transmission of data / signal on the SBFD symbol and the non-SBFD symbol.

[0204] For example, taking DCI as an example, the network device sends DCI to the terminal device, the DCI schedules the PDSCH periodic transmission, and the DCI indicates that the PDSCH periodic transmission is associated with the SBFD symbol. In this way, the network device or the terminal device only performs the PDSCH periodic transmission on the SBFD symbol.

[0205] For the multi-slot uplink periodic transmission, the multi-slot periodic transmission can be associated with the SBFD symbol, so that the terminal device or the network device performs the periodic transmission of data / signal on the SBFD symbol. Alternatively, the multi-slot periodic transmission can be associated with the non-SBFD symbol, so that the terminal device or the network device performs the periodic transmission of data / signal on the non-SBFD symbol. Alternatively, the multi-slot periodic transmission can be associated with the SBFD symbol and the non-SBFD symbol, so that the terminal device or the network device performs the periodic transmission of data / signal on the SBFD symbol and the non-SBFD symbol.

[0206] For the multi-slot uplink periodic transmission, the multi-slot periodic transmission can be associated with the SBFD symbol, so that the terminal device or the network device performs the periodic transmission of data / signal on the SBFD symbol. Alternatively, the multi-slot periodic transmission can be associated with the non-SBFD symbol, so that the terminal device or the network device performs the periodic transmission of data / signal on the non-SBFD symbol. Alternatively, the multi-slot periodic transmission can be associated with the SBFD symbol and the non-SBFD symbol, so that the terminal device or the network device performs the periodic transmission of data / signal on the SBFD symbol and the non-SBFD symbol.

[0207] For example, taking DCI as an example, the network device sends DCI to the terminal device, the DCI schedules the PDSCH periodic transmission, and the DCI indicates that the PDSCH periodic transmission is associated with the SBFD symbol. In this way, the network device or the terminal device only performs the PDSCH periodic transmission on the SBFD symbol.

[0208] For the TBoMS transmission, the terminal device or the network device performs the TBoMS transmission on the first resource. The TBoMS transmission is associated with a type of symbol in the time domain of the first resource, and the association can be network configured, pre-configured, or specified by a standard protocol.

[0209] For the association of the TBoMS transmission with the type of symbol in the time domain of the first resource, the TBoMS transmission can be associated with the SBFD symbol, so that the terminal device or the network device performs the TBoMS transmission on the SBFD symbol. Alternatively, the TBoMS transmission can be associated with the non-SBFD symbol, so that the terminal device or the network device performs the TBoMS transmission on the non-SBFD symbol. Alternatively, the TBoMS transmission can be associated with the SBFD symbol and the non-SBFD symbol, so that the terminal device or the network device performs the TBoMS transmission on the SBFD symbol and the non-SBFD symbol.

[0210] In some possible examples, the communication is associated with the type of symbol in the time domain of the first resource, including that a signal for the communication is associated with the type of symbol in the time domain of the first resource.

[0211] In this way, the terminal device or the network device can determine the type of symbol in the time domain of the first resource according to the signal for the communication, and transmit the signal for the communication on the first resource.

[0212] It should be noted that the signal for the communication can be SRS or CSI-RS, etc. In addition, the signal for the communication can be network configured, network indicated, network activated, or network scheduled. For example, the network device sends DCI to the terminal device, and the DCI schedules the periodic transmission of the CSI-RS.

[0213] For the SRS, the terminal device transmits the SRS on the first resource, and the corresponding network device receives the SRS. The SRS is associated with the type of symbol in the time domain of the first resource, and the association can be network configured, pre-configured, or specified by a standard protocol.

[0214] For example, for the signal for the communication being SRS, the SRS can be associated with the SBFD symbol, so that the terminal device transmits the SRS on the SBFD symbol. Alternatively, the SRS can be associated with the non-SBFD symbol, so that the terminal device transmits the SRS on the non-SBFD symbol. Alternatively, the SRS can be associated with the SBFD symbol and the non-SBFD symbol, so that the terminal device transmits the SRS on the SBFD symbol and the non-SBFD symbol.

[0215] For the CSI-RS, the network device transmits the CSI-RS on the first resource, and the corresponding terminal device receives the CSI-RS. Wherein, the CSI-RS is associated with the type of symbol in the time domain of the first resource, and the association can be network configured, pre-configured, or standard protocol specified. Wherein, the CSI-RS is associated with the type of symbol in the time domain of the first resource, and the association can be network configured, pre-configured, or standard protocol specified.

[0216] For example, the CSI-RS can be associated with the SBFD symbol, so that the network device transmits the CSI-RS on the SBFD symbol. Or, the CSI-RS can be associated with the non-SBFD symbol, so that the network device transmits the CSI-RS on the non-SBFD symbol. Or, the CSI-RS can be associated with the SBFD symbol and the non-SBFD symbol, so that the network device transmits the CSI-RS on the SBFD symbol and the non-SBFD symbol.

[0217]

Method two

[0218] In "Method two", the type of symbol in the time domain of the first resource is determined according to the network configuration mode for the communication. Wherein, the network configuration mode refers to that the network device indicates / configures the first TCI and the type of symbol in the time domain of the first resource through RRC signaling, MAC signaling (such as MAC CE) or DCI, etc. In this way, the embodiment can directly indicate the type of symbol in the time domain of the first resource by the network.

[0219] For example, the higher layer signaling (such as RRC signaling or MAC CE) configuration or DCI indication is as follows: one of the first value, the second value or the third value.

[0220] The first value can indicate that the type of symbol is the non-SBFD symbol; at this time, the type of symbol in the time domain of the first resource is the non-SBFD symbol; in this way, the terminal device or the network device only communicates on the non-SBFD symbol.

[0221] It should be noted that for the first value, only the available frequency domain resource of the non-SBFD symbol in the corresponding symbol direction is transmitted. Wherein, the available frequency domain resource of the non-SBFD symbol in the corresponding symbol direction refers to the symbol conforming to the corresponding channel or signal transmission or reception direction. For example, the PDSCH can only be in the downlink symbol or flexible symbol, and needs to be in the current active DL BWP; for example, the PUSCH can only be in the uplink symbol or flexible symbol, and needs to be in the current active UL BWP. Optionally, the time in other symbol types is discarded or postponed, for example, the transmission or reception time in the SBFD symbol is discarded or postponed.

[0222] The second value can indicate that the type of the symbol is the SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is the SBFD symbol; in this way, the terminal device or the network device only communicates on the SBFD symbol.

[0223] It should be noted that for the second value, transmission is only within the available frequency domain resource of the SBFD symbol in the corresponding symbol direction. The available frequency domain resource of the corresponding symbol direction refers to the symbol that meets the corresponding channel or signal transmission or reception direction. For example, the PDSCH can only be in the downlink sub-band of the SBFD symbol and needs to be in the current active DL BWP; for another example, the PUSCH can only be in the uplink sub-band of the SBFD symbol and needs to be in the current active UL BWP. Optionally, the time of other symbol types is discarded or postponed, for example, the transmission or reception time of the non-SBFD symbol is discarded or postponed.

[0224] The third value indicates that the type of the symbol is the SBFD symbol and the non-SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is the non-SBFD symbol and the SBFD symbol. In this way, the terminal device or the network device communicates on the non-SBFD symbol and the SBFD symbol. The third value can be represented by two (all).

[0225] It should be noted that for the case where the network device and the terminal device need to communicate multiple times, the network device can only need to indicate the type of the symbol of the resource used for communication in the time domain to the terminal device once. The type indicated this time can be applicable to each communication. That is, the type of the symbol of the resource used in each communication in the time domain is the type indicated this time, so that the type of the symbol of the resource used in each communication in the time domain can be the same. In this way, one indication is used multiple times, thereby facilitating the saving of signaling overhead.

[0226] Alternatively, for the case where the network device and the terminal device need to communicate multiple times, the network device needs to indicate the type of the symbol of the resource used in each communication in the time domain to the terminal device respectively each time. In this way, the type of the symbol of the resource used in each communication in the time domain is separately network-indicated, so that the type of the symbol of the resource used in each communication in the time domain can be different, thereby facilitating the diversity of resource configuration.

[0227] The following takes the type of the symbol of the first resource in the time domain indicated by the first information as an example. The network device can send the first information to the terminal device, and the corresponding terminal device receives the first information. In this way, since the first information is sent by the network device, the type of the symbol of the resource used for the communication in the time domain is directly indicated by the network through the first information.

[0228] It should be noted that the type of symbol indicated by the first information can be applicable to multiple communications between the network device and the terminal device, that is, the type of symbol indicated by the first information is applicable to the communication and other communications between the network device and the terminal device. Or, the type of symbol indicated by the first information is only applicable to the communication, and the resources used by other communications between the network device and the terminal device are the type of symbol in the time domain, which needs to be indicated by the network device.

[0229] In addition, the network device can send the first information to the terminal device before the communication through the channel on the first resource. For example, in FIG. 2, the network device sends the first information to the terminal device before S210. Wherein, the first information here indicates the type of symbol in the time domain of the first resource.

[0230] In some possible examples, the first information is carried by RRC signaling, MAC signaling, DCI or system information. In this way, since the RRC signaling, MAC signaling, DCI or system information is sent by the network device, the network indicates the type of symbol in the time domain of the first resource.

[0231] In some possible examples, the first information is one of a first value, a second value or a third value.

[0232] It should be noted that the meanings of the first value, the second value and the third value can be seen from the above description. That is, for the communication, the first value indicates that the type of symbol in the time domain of the first resource is SBFD symbol, the second value indicates that the type of symbol in the time domain of the first resource is non-SBFD symbol, and the third value indicates that the type of symbol in the time domain of the first resource is SBFD symbol and non-SBFD symbol.

[0233] For example, taking the first information containing 2 bits as an example, the value "00" of the 2 bits is taken as the first value, the value "01" of the 2 bits is taken as the second value, and the value "10" of the 2 bits is taken as the third value.

[0234]

Scheme 2

[0235] The network device can configure at least one TCI for uplink transmission and / or downlink transmission, and the TCI has a TCI state. Wherein, the TCI state can indicate the reception parameter of the physical downlink channel or the downlink signal, or can indicate the transmission parameter of the physical uplink channel or the uplink signal. In addition, under the QCL type of the TCI state is QCL typeD, the TCI state is used to indicate the beam.

[0236] Based on this, in "Solution 2", for the process of multi-slot communication in the scenario of introducing SBFD in a TDD system, when a terminal device and a network device need to perform a certain communication (such as multi-slot uplink repeated transmission, multi-slot downlink repeated transmission, multi-slot uplink periodic transmission, multi-slot downlink periodic transmission, multi-slot PUSCH / PUCCH, or multi-slot TBoMS transmission), the network device and the terminal device can determine the resource used for the communication and the first TCI used for the communication transmission. The resource used for the communication is in the available resource, which occupies multiple slots in the time domain, for example, the available resource occupies slots 1, 2, 3, and 4 in the time domain. In this way, the terminal device can perform the communication with the network device based on the first TCI.

[0237] In addition, the communication can be configured, indicated, activated, or scheduled by the network device, for example, the network device sends a DCI to the terminal device, and the DCI schedules PDSCH transmission. The resource used for the communication is configured, indicated, or activated by the network device.

[0238] It should be noted that the transmission of the communication needs to use the first TCI. For example, the DCI schedules PDSCH transmission, and the PDSCH transmission uses the first TCI. The QCL type of the TCI state of the first TCI is one of QCL typeA, QCL typeB, QCL typeC, or QCL typeD. The QCL typeD of the first TCI can indicate a beam, so that the terminal device and the network device perform the communication through the beam.

[0239] The resource used for the communication occupies one or more slots in the time domain. The resource used for the communication can be a part or all of the available resource. In addition, the slots occupied by the resource used for the communication in the time domain can be a part or all of the slots occupied by the available resource in the time domain, or the slots occupied by the resource used for the communication in the time domain can be continuous or discontinuous.

[0240] In addition, the type of the symbol of the resource used for the communication in the time domain can be an SBFD symbol, or the type of the symbol of the resource used for the communication in the time domain can be a non-SBFD symbol, or the type of the symbol of the resource used for the communication in the time domain can be an SBFD symbol and a non-SBFD symbol.

[0241] In this way, the terminal device or the network device can perform the communication through the channel on the resource used for the communication based on the first TCI, thereby realizing multi-slot communication in the scenario of introducing SBFD in a TDD system.

[0242] The following is an example of a process of multi-slot communication in a scenario of introducing SBFD in a TDD system, taking the first resource used for the communication as an example, as shown in FIG. 3. FIG. 3 is a flowchart of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0243] S310. Perform communication through the first channel on the first resource based on the first TCI, wherein the first resource occupies one or more slots in the time domain; the first resource is an SBFD symbol in the time domain, or the first resource is a non-SBFD symbol in the time domain; or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

[0244] It can be seen that the terminal device or the network device can perform communication through the first channel on the first resource based on the first TCI, thereby realizing multi-slot communication in a scenario of introducing SBFD in a TDD system.

[0245] If the first resource is an SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is an SBFD symbol, thereby realizing that the terminal device or the network device only communicates on the SBFD symbol. In this way, the network device can realize uplink transmission and downlink transmission through the SBFD symbol, or the terminal device can realize uplink transmission or downlink transmission through the SBFD symbol. In addition, compared with the case of using multiple symbol types, because the frequency domain resources, transmission parameters (such as power control), and TCIs in different symbol types are different, only communicating on the SBFD symbol of one symbol type can simplify the scheduling parameters and transmission and reception processing.

[0246] If the first resource is a non-SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is a non-SBFD symbol, thereby realizing that the terminal device or the network device only communicates on the non-SBFD symbol. In this way, the terminal device or the network device can realize uplink transmission or downlink transmission through the non-SBFD symbol. In addition, compared with the case of using multiple symbol types, because the frequency domain resources, transmission parameters (such as power control), and TCIs in different symbol types are different, only communicating on the SBFD symbol of one symbol type can simplify the scheduling parameters and transmission and reception processing.

[0247] If the first resource is SBFD symbols and non-SBFD symbols in the time domain, it means that the type of the symbol of the first resource in the time domain is SBFD symbols and non-SBFD symbols, so as to realize the communication of the terminal device or the network device on the SBFD symbol and the non-SBFD symbol. In this way, the network device can realize uplink transmission and downlink transmission through the SBFD symbol and the non-SBFD symbol, or the terminal device can realize uplink transmission or downlink transmission through the SBFD symbol and the non-SBFD symbol. In addition, the communication on the SBFD symbol and the non-SBFD symbol can complete the transmission of signals / data as soon as possible and reduce the transmission delay.

[0248] The following embodiment determines the type of the symbol of the first resource in the time domain of the first TCI and the first resource from the following manner.

[0249]

Manner A

[0250] In "Manner A", the embodiment considers the association of the TCI and the type of the symbol of the resource in the time domain. The association of the TCI and the type of the symbol of the resource in the time domain can be network configured, network indicated or default. The default association rule can be predefined by the standard protocol.

[0251] For example, for network configuration, taking the MAC CE indicating the association of the TCI and the type of the symbol of the resource in the time domain as an example, the structure of the MAC CE is shown in FIG. 4, and the MAC CE includes the following fields:

[0252] Serving Cell Identity (Serving Cell ID) field: the field indicates the identity of the serving cell to which the MAC CE is applicable;

[0253] Downlink bandwidth part identity (DL BWP ID) field: the field indicates the DL BWP to which the MAC CE is applicable;

[0254] Uplink bandwidth part identity (UL BWP ID) field: the field indicates the UL BWP to which the MAC CE is applicable;

[0255] D / U field: the field indicates whether the TCI state ID in the same byte is a joint / downlink TCI state or an uplink TCI state; if the field is set to 1, the TCI state ID in the same byte is a joint / downlink TCI state; if the field is set to 0, the TCI state ID in the same byte is an uplink TCI state;

[0256] Symbol Type field; the field indicates that the TCI state activated by the MAC CE is associated with SBFD symbols or non-SBFD;

[0257] Reserved (R) field: represents reserved bits, set to 0;

[0258] Pi (i = 1, 2, …, 8) field: the field indicates that the i-th TCI code point includes multiple TCI states or one TCI state;

[0259] TCI state ID field: the field indicates the TCI state identification.

[0260] For example, the default association rule is as follows: for a plurality of TCIs configured by the network device, the first TCI in the plurality of TCIs is associated with SBFD symbols, the second TCI in the plurality of TCIs is associated with non-SBFD symbols, and the third TCI in the plurality of TCIs is associated with SBFD symbols and non-SBFD symbols.

[0261] In the case of association of the TCI with the type of symbol of the resource in the time domain, the following embodiment determines the type of symbol of the first TCI and the first resource in the time domain.

[0262] The process of multi-slot communication in the scenario of introducing SBFD in a TDD system is exemplarily illustrated, as shown in FIG. 5. FIG. 5 is a flowchart of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0263] S510. The network device sends first indication information, and the first indication information is used to indicate at least one TCI associated with the type of symbol of the resource in the time domain;

[0264] S520. The terminal device determines the type of symbol of the first TCI and the first resource in the time domain from the at least one TCI;

[0265] S530. The same as S310, which will not be described here.

[0266] It should be noted that the at least one TCI indicated by the first indication information can be a unified TCI state or a traditional TCI state, which will be described below.

[0267]

Unified TCI state

[0268] For the unified TCI state, the TCI indicated by the first indication information includes the TCI of one TCI codepoint. The TCI of the TCI codepoint is associated with the type of symbol in the time domain, and the TCI state of the TCI of the TCI codepoint is the unified TCI state. Hereinafter, the TCI mentioned in this embodiment can be equivalent to the TCI state.

[0269] The following will be described in detail taking the Pi (i = 1, 2, …, 8) field in the MAC CE as the first indication information. The MAC CE is used to activate / deactivate the unified TCI state, and the MAC CE can activate the TCI of one TCI codepoint. The TCI of the TCI codepoint can include two TCIs or one TCI, or the TCI state of the TCI codepoint can include two TCI states or one TCI state.

[0270] When the TCI of the TCI codepoint includes two TCIs, one of the two TCIs is associated with the non-SBFD symbol and the other is associated with the SBFD symbol, and the TCI state of the two TCIs can be the separate TCI state or the joint TCI state. When the TCI of the TCI codepoint includes one TCI, the one TCI is associated with the non-SBFD symbol and the SBFD symbol.

[0271] Taking the TCI of one TCI codepoint including two TCIs as an example, as shown in FIG. 6, in (a) of FIG. 6, for the separate TCI state, one TCI codepoint includes one of the uplink TCI state 1 or the downlink TCI state 1, and one of the uplink TCI state 2 or the downlink TCI state 2. The uplink TCI state 1 is associated with the SBFD symbol, the downlink TCI state 1 is associated with the SBFD symbol, the uplink TCI state 2 is associated with the non-SBFD symbol, and the downlink TCI state 2 is associated with the non-SBFD symbol.

[0272] In (b) of FIG. 6, for the joint TCI state, one TCI codepoint includes the joint TCI state 1 and the joint TCI state 2. The joint TCI state 1 is associated with the SBFD symbol, and the joint TCI state 2 is associated with the SBFD symbol.

[0273] For example, the structure of the MAC CE is shown in FIG. 7, and the MAC CE includes the following fields:

[0274] Serving Cell ID field: This field indicates the identification of the service cell to which the MAC CE applies;

[0275] Downlink bandwidth part identification (DL BWP ID) field: this field indicates the DL BWP to which the MAC CE applies;

[0276] Uplink bandwidth part identification (UL BWP ID) field: this field indicates the UL BWP to which the MAC CE applies;

[0277] Reserved (R) field: represents reserved bits, set to 0;

[0278] Pi (i = 1, 2, …, 8) field: this field indicates that the ithTCI codepoint includes two TCI states or one TCI state; if the Pi field is set to 1, the Pi field indicates that the ithTCI codepoint includes two TCI states; wherein one of the two TCI states is associated with non-SBFD symbols and the other TCI state is associated with SBFD symbols; if the Pi field is set to 0, the Pi field indicates that the ithTCI codepoint includes one TCI state, and the one TCI state is associated with non-SBFD symbols and SBFD symbols;

[0279] N / S field: this field indicates whether the TCI state identification in the same byte is used for joint TCI state or independent TCI state; if the field is set to 1, the TCI state identification in the same byte is used for joint TCI state; if the field is set to 0, the TCI state identification in the same byte is used for independent TCI state;

[0280] TCI state identification field: this field indicates the TCI state identification.

[0281] In summary, the first indication information can indicate the TCI of a TCI codepoint, and the TCI of the TCI codepoint includes two TCIs or one TCI. When the TCI of the TCI codepoint includes two TCIs, the two TCIs are a first candidate TCI and a second candidate TCI. Wherein, the first candidate TCI is associated with non-SBFD symbols, and the second candidate TCI is associated with SBFD symbols.

[0282] Optionally, the TCI state of the first candidate TCI is a separate downlink TCI state (separate DL TCI state), a separate uplink TCI state, or a joint TCI state (joint TCI state).

[0283] Optionally, the TCI state of the second candidate TCI is a separate downlink TCI state, a separate uplink TCI state, or a joint TCI state.

[0284] Optionally, the first candidate TCI is associated with a non-SBFD symbol, and can be configured by the network device or specified by a standard protocol.

[0285] Optionally, the second candidate TCI is associated with an SBFD symbol, and can be configured by the network device or specified by a standard protocol.

[0286] In some possible examples, for S520, the terminal device can determine the type of the symbol in the time domain of the first TCI and the first resource according to a network configuration manner. The network configuration manner refers to that the network device indicates / configures through high-layer signaling (such as RRC signaling or MAC CE) or DCI and the like.

[0287] In a specific implementation, the terminal device in S520 determines the type of the symbol in the time domain of the first TCI and the first resource from the at least one TCI, and can include the following steps:

[0288] The terminal device receives second indication information, and the second indication information is used to indicate the type of the symbol in the time domain of the first TCI and / or the first resource.

[0289] The terminal device determines the type of the symbol in the time domain of the first TCI and the first resource according to the second indication information.

[0290] It should be noted that the second indication information can be carried by high-layer signaling (such as RRC signaling or MAC CE) or DCI. In addition, for determining the type of the symbol in the time domain of the first TCI and the first resource according to the second indication information, the present embodiment has the following cases:

[0291] In one case, if the second indication information is used to indicate the first TCI, the type of the symbol associated with the first TCI is determined as the type of the symbol in the time domain of the first resource; this is because, since the first TCI is associated with the type of the symbol, the terminal device can determine the type of the symbol in the time domain of the first resource according to the first TCI;

[0292] In one case, if the second indication information is used to indicate the type of the symbol in the time domain of the first resource, the TCI associated with the type of the symbol in the time domain of the first resource is determined as the first TCI; this is because, since the TCI is associated with the type of the symbol, the terminal device can determine the first TCI according to the type of the symbol in the time domain of the first resource;

[0293] In one case, the second indication information is used to indicate the type of the symbol in the time domain of the first TCI and the first resource.

[0294] For example, taking two TCIs indicated by the first indication information as a first candidate TCI and a second candidate TCI as an example, the second indication information includes one of a first value, a second value, a third value, or a fourth value.

[0295] The first value indicates that the first candidate TCI and / or the type of the symbol is a non-SBFD symbol; at this time, the first TCI is the first candidate TCI, and the type of the symbol of the first resource in the time domain is a non-SBFD symbol; in this way, the terminal device or the network device only performs the communication on the non-SBFD symbol. Since the first candidate TCI is associated with the non-SBFD symbol, when the first value only indicates the first candidate TCI, the type of the symbol of the first resource in the time domain can be determined to be a non-SBFD symbol according to the association; or, when the first value only indicates that the type of the symbol is a non-SBFD symbol, the first TCI can be determined to be the first candidate TCI according to the association.

[0296] It should be noted that, for the first value, only the available frequency domain resource of the non-SBFD in the corresponding symbol direction. Among them, the available frequency domain resource of the corresponding symbol direction refers to the symbol conforming to the corresponding channel or signal transmission or reception direction. For example, the PDSCH can only be in the downlink symbol or the flexible symbol, and needs to be in the current active DL BWP. For another example, the PUSCH can only be in the uplink symbol or the flexible symbol, and needs to be in the current active UL BWP. Optionally, the time in other symbol types is discarded or postponed, for example, the transmission or reception time in the SBFD symbol is discarded or postponed.

[0297] The second value indicates that the second candidate TCI and / or the type of the symbol is a SBFD symbol; at this time, the first TCI is the second candidate TCI, and the type of the symbol of the first resource in the time domain is a SBFD symbol; in this way, the terminal device or the network device only performs the communication on the SBFD symbol. Since the second candidate TCI is associated with the SBFD symbol, when the second value only indicates the second candidate TCI, the type of the symbol of the first resource in the time domain can be determined to be a SBFD symbol according to the association; or, when the first value only indicates that the type of the symbol is a SBFD symbol, the first TCI can be determined to be the second candidate TCI according to the association.

[0298] It should be noted that, for the second value, only the available frequency domain resources of the SBFD symbol in the corresponding symbol direction. Among them, the available frequency domain resources of the corresponding symbol direction refer to the symbols conforming to the corresponding channel or signal transmission or reception direction. For example, PDSCH can only be in the downlink subband of the SBFD symbol and needs to be in the current active DL BWP; for another example, PUSCH can only be in the uplink subband of the SBFD symbol and needs to be in the current active UL BWP. Optionally, the time of other symbol types is discarded or postponed, for example, the transmission or reception time of non-SBFD symbols is discarded or postponed.

[0299] The third value indicates that the type of the symbol is SBFD symbol and non-SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is non-SBFD symbol and SBFD symbol. In this way, the terminal device or the network device performs the communication on the non-SBFD symbol and the SBFD symbol. Among them, the third value can be represented by two (all). In addition, since the first candidate TCI is associated with the non-SBFD symbol, and the second candidate TCI is associated with the SBFD symbol, the first candidate TCI is used when transmitting on the non-SBFD symbol, and the second candidate TCI is used when transmitting on the SBFD symbol.

[0300] It should be noted that, for the third value, the terminal device or the network device only applies the respective TCI in the available frequency domain resources of the corresponding symbol direction. For example, the first candidate TCI is applied in the available frequency domain resources of the non-SBFD symbol direction, and the second candidate TCI is applied in the available frequency domain resources of the SBFD symbol direction.

[0301] The fourth value indicates that the type of the symbol is SBFD symbol and non-SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is SBFD symbol and non-SBFD symbol. In this way, the terminal device or the network device performs the communication on the non-SBFD symbol and the SBFD symbol. In addition, since the first candidate TCI is associated with the non-SBFD symbol, and the second candidate TCI is associated with the SBFD symbol, the first candidate TCI is used when transmitting on the non-SBFD symbol, and the second candidate TCI is used when transmitting on the SBFD symbol.

[0302] It should be noted that, for the fourth value, the terminal device or the network device only applies the same TCI in the available frequency domain resources of the corresponding symbol direction. Among them, the same TCI is one TCI other than the first candidate TCI and the second candidate TCI. At this time, the first TCI is one TCI other than the first candidate TCI and the second candidate TCI. Among them, the fourth value can be represented by none (None).

[0303] In some possible examples, for S520, the terminal device can determine the type of the symbol in the time domain of the first TCI and the first resource according to a default manner. The default manner can be predefined by a standard protocol, or used when a certain condition is met, and the certain condition can be different for different channels.

[0304] For example, taking two TCIs indicated by the first indication information as a first candidate TCI and a second candidate TCI as an example, the options of the default manner are as follows:

[0305] Option 1: the communication uses the first candidate TCI, and / or the type of the symbol is a non-SBFD symbol; at this time, the first TCI is the first candidate TCI, and the type of the symbol in the time domain of the first resource is a non-SBFD symbol; in this way, the terminal device or the network device performs the communication only on the non-SBFD symbol; since the first candidate TCI is associated with the non-SBFD symbol, when it is defaulted that the communication uses the first candidate TCI, the type of the symbol in the time domain of the first resource can be determined to be a non-SBFD symbol according to the association; or, when it is defaulted that the type of the symbol is a non-SBFD symbol, the first TCI can be determined to be the first candidate TCI according to the association.

[0306] Option 2: the communication uses the second candidate TCI, and / or the type of the symbol is an SBFD symbol; at this time, the first TCI is the second candidate TCI, and the type of the symbol in the time domain of the first resource is an SBFD symbol; in this way, the terminal device or the network device performs the communication only on the SBFD symbol; since the second candidate TCI is associated with the SBFD symbol, when it is defaulted that the communication uses the second candidate TCI, the type of the symbol in the time domain of the first resource can be determined to be an SBFD symbol according to the association; or, when it is defaulted that the type of the symbol is an SBFD symbol, the first TCI can be determined to be the second candidate TCI according to the association.

[0307] Option 3: the type of the symbol is the type of the symbol of the resource where the first channel or signal is located, and the TCI used by the communication is determined by the type of the symbol.

[0308] It should be noted that, if the first channel or signal is a DCI-scheduled channel or signal, it refers to the type of symbol of the transmission or reception position of the first channel or signal determined by the DCI scheduling; if the first channel or signal is a high-layer signaling configured channel or signal, it refers to the type of symbol of the transmission or reception position of the first channel or signal within each period; if the first channel or signal is a high-layer signaling configured and MAC-CE activated channel or signal, it refers to the type of symbol of the transmission or reception position of the first channel or signal within each period; if the first channel or signal is a high-layer signaling configured and DCI activated channel or signal, it refers to the type of symbol of the transmission or reception position of the first channel or signal within each period, or the type of symbol of the first activation time position. In addition, for the TCI used by the communication determined by the type of symbol, if the type of symbol is a non-SBFD symbol, since the first candidate TCI is associated with the non-SBFD symbol, the TCI used by the communication is the first candidate TCI, and at this time the first TCI is the first candidate TCI; if the type of symbol is an SBFD symbol, since the second candidate TCI is associated with the SBFD symbol, the TCI used by the communication is the second candidate TCI, and at this time the first TCI is the second candidate TCI.

[0309] Option 4: The type of symbol is an SBFD symbol and a non-SBFD symbol; at this time, the type of symbol of the first resource in the time domain is an SBFD symbol and a non-SBFD symbol. In this way, the terminal device or the network device performs the communication on the non-SBFD symbol and the SBFD symbol. In addition, since the first candidate TCI is associated with the non-SBFD symbol, and the second candidate TCI is associated with the SBFD symbol, the first candidate TCI is used when transmitting on the non-SBFD symbol, and the second candidate TCI is used when transmitting on the SBFD symbol.

[0310] In combination with the above description, the following embodiments will illustrate the above-mentioned determination of the first TCI used by the communication transmission and the type of symbol of the first resource in the time domain according to the network configuration mode or the default mode from the following multiple examples.

[0311] Example 1: Taking the PDSCH transmission scheduled / activated by the DCI (such as DCI format 1_0 / 1_1 / 1_2 / 1_3) as an example, as shown in Table 1, when the terminal device is configured with a first candidate TCI and a second candidate TCI, if the terminal device is in frequency range 1 (FR1), or if the terminal device supports the capability of two default beams, or if the terminal device does not support the capability of two default beams, or if the offset between the end position of the PDCCH where the DCI is located and the start position of the PDSCH scheduled / activated by the DCI is equal to or greater than a threshold, or if the offset between the end position of the PDCCH where the DCI is located and the start position of the PDSCH scheduled / activated by the DCI is less than the threshold, one of the following cases exists:

[0312] Case 1: If the terminal device has configured high layer signaling, the first TCI used by the PDSCH transmission scheduled or activated by the DCI is indicated by the high layer signaling. Wherein, the high layer signaling indicates one of the following: a first value, a second value, a third value or a fourth value. For example, when the DCI format 1_0 is carried by the search space PDCCH of the non-Type0 / 0A / 2 CSS on the control resource set 0 (CORESET 0), the PDSCH scheduled or activated by the DCI format 1_0 uses the first candidate TCI or the second candidate TCI.

[0313] Case 2: If the terminal device does not have configured high layer signaling, the first TCI used by the PDSCH scheduled or activated by the DCI is determined in a default manner. Wherein, the options of the default manner are one of the following:

[0314] Option 1: The PDSCH transmission scheduled or activated by the DCI uses the first candidate TCI, and the PDSCH is only transmitted on non-SBFD symbols; at this time, the first TCI is the first candidate TCI, and the type of the symbol in the time domain of the first resource is a non-SBFD symbol;

[0315] Option 2: The PDSCH transmission scheduled or activated by the DCI uses the second candidate TCI, and the PDSCH is only transmitted on SBFD symbols; at this time, the first TCI is the second candidate TCI, and the type of the symbol in the time domain of the first resource is an SBFD symbol;

[0316] Option 3: Only the PDSCH is transmitted in the type of the symbol of the resource where the first channel or signal scheduled or activated by the DCI format 1_0 is located, and the TCI used by the PDSCH transmission is determined by the type of the symbol. For example, the type of the symbol of the resource where the first SPS PDSCH activated by the DCI format 1_0 is located is an SBFD symbol, then all subsequent SPS PDSCHs are only transmitted on SBFD symbols, and the time in non-SBFD is discarded or postponed.

[0317] Option 4: The PDSCH is transmitted on non-SBFD symbols and SBFD symbols.

[0318] Case 3: When the DCI (such as DCI format 1_1 / 1_2 / 1_3) has a first field (such as the first field is an occasion selection field, and whether the first field is present is configured by higher layer signaling), the terminal device should determine the first TCI used by the PDSCH scheduled or activated by the DCI and the type of symbols in the time domain of the resources of the PDSCH according to the following content:

[0319] If the value / codepoint of the first field is "00", the PDSCH scheduled or activated by the DCI uses the first candidate TCI, and the PDSCH is only transmitted on the available frequency domain resources of the downlink subband of non-SBFD symbols;

[0320] If the value / codepoint of the first field is "01", the PDSCH scheduled or activated by the DCI uses the second candidate TCI, and the PDSCH is only transmitted on the available frequency domain resources of the downlink subband of SBFD symbols;

[0321] If the value / codepoint of the first field is "10", the PDSCH scheduled or activated by the DCI is transmitted on non-SBFD symbols and SBFD symbols; wherein the first candidate TCI is used when the PDSCH is transmitted on non-SBFD symbols; the second candidate TCI is used when the PDSCH is transmitted on SBFD symbols.

[0322] Case 3: When the DCI (such as DCI format 1_1 / 1_2 / 1_3) does not have a first field, the first TCI used by the PDSCH scheduled or activated by the DCI and the type of symbols in the time domain of the resources of the PDSCH are determined in the default manner.

[0323] Table 1

[0324] Example 2: Taking the communication as PDCCH in the CORESET, the DM-RS antenna ports used for the reception of the PDCCH and the DM-RS antenna ports used for the PDSCH scheduled by the DCI carried by the PDCCH are quasi-co-located with the reference signals of the TCI state.

[0325] Table 2

[0326] As shown in Table 2, for the CORESET with index 0 (i.e., CORESET0), if the CORESET provides a first candidate TCI and a second candidate TCI, the following cases exist:

[0327] Case 1: If the CORESET is associated with PDCCH CSS and search space 0 of Type0 / Type0A / Type2, then

[0328] If the higher layer signaling is configured with a first value (e.g., 'first'), the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signal provided by the first candidate TCI, and the PDCCH is only transmitted on non-SBFD symbols; at this time, the first TCI is the first candidate TCI;

[0329] If the higher layer signaling is configured with a second value (e.g., "second"), the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signal of the second candidate TCI, and the PDCCH is only transmitted on SBFD symbols; at this time, the first TCI is the second candidate TCI;

[0330] If the higher layer signaling is configured with a fourth value (e.g., 'none'), the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signal of the other TCI except the first candidate TCI and the second candidate TCI, and the PDCCH is transmitted on non-SBFD symbols and SBFD symbols; at this time, the first TCI is the other TCI; wherein the other TCI is indicated by the MAC CE activation command of the CORESET.

[0331] Case 2: If the CORESET is not associated with PDCCH CSS and search space 0 of Type0 / Type0A / Type2, then

[0332] If the higher layer signaling is configured with a first value (e.g., 'first'), the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signal provided by the first candidate TCI, and the PDCCH is only transmitted on non-SBFD symbols; at this time, the first TCI is the first candidate TCI;

[0333] If the higher layer signaling is configured with a second value (e.g., "second"), the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signal of the second candidate TCI, and the PDCCH is only transmitted on SBFD symbols; at this time, the first TCI is the second candidate TCI;

[0334] If the third value (e.g., 'both') is configured by higher layer signaling, the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signals of the first and second candidate TCIs, and the PDCCH is transmitted on non-SBFD symbols and SBFD symbols; wherein the first candidate TCI is used when the PDCCH is transmitted on non-SBFD symbols; the second candidate TCI is used when the PDSCH is transmitted on SBFD symbols.

[0335] If the fourth value (e.g., 'none') is configured by higher layer signaling, the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signals of other TCIs than the first and second candidate TCIs, and the PDCCH is transmitted on non-SBFD symbols and SBFD symbols; at this time, the first TCI is the other TCI; wherein the other TCI is indicated by the MAC CE activation command of the CORESET.

[0336] Case 3: Otherwise, the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the SSB identified in the latest random access procedure.

[0337] As shown in Table 2, for a CORESET with index other than 0 (non-CORESET0), if the CORESET provides the first and second candidate TCIs, there are the following cases:

[0338] Case a: If the CORESET is associated with a USS set and / or a Type3-PDCCH CSS set, then

[0339] If the first value (e.g., 'first') is configured by higher layer signaling, the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signals provided by the first candidate TCI, and the PDCCH is transmitted only on non-SBFD symbols; at this time, the first TCI is the first candidate TCI.

[0340] If the second value (e.g.,'second') is configured by higher layer signaling, the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signals of the second candidate TCI, and the PDCCH is transmitted only on SBFD symbols; at this time, the first TCI is the second candidate TCI.

[0341] If the higher layer signaling is configured with the first value (e.g., 'first'), the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signal provided by the first candidate TCI, and the PDCCH is transmitted only on non-SBFD symbols; at this time, the first TCI is the first candidate TCI,

[0342] Case b: If the CORESET is associated with a CSS set other than the Type3-PDCCH CSS set, the first TCI is the first candidate TCI.

[0343] If the higher layer signaling is configured with the first value (e.g., 'first'), the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signal provided by the first candidate TCI, and the PDCCH is transmitted only on non-SBFD symbols; at this time, the first TCI is the first candidate TCI,

[0344] If the higher layer signaling is configured with the second value (e.g.,'second'), the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signal of the second candidate TCI, and the PDCCH is transmitted only on SBFD symbols; at this time, the first TCI is the second candidate TCI.

[0345] If the higher layer signaling is configured with the third value (e.g., 'both'), the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signals of the first candidate TCI and the second candidate TCI, and the PDCCH is transmitted on non-SBFD symbols and SBFD symbols; at this time, the first candidate TCI is used when the PDCCH is transmitted on non-SBFD symbols; the second candidate TCI is used when the PDSCH is transmitted on SBFD symbols.

[0346] If the higher layer signaling is configured with the fourth value (e.g., 'none'), the DM-RS antenna ports used for the PDCCH reception are quasi co-located with the reference signal of the other TCI other than the first candidate TCI and the second candidate TCI, and the PDCCH is transmitted on non-SBFD symbols and SBFD symbols; at this time, the first TCI is the other TCI; wherein the other TCI is indicated by the MAC CE activation command of the CORESET.

[0347] Example 3: Taking the communication as a CSI-RS transmission, the terminal device is configured with the first candidate TCI and the second candidate TCI.

[0348] If the offset between the last symbol of the PDCCH carrying the triggering DCI and the first symbol of the aperiodic CSI-RS resource in the aperiodic CSI-RS resource set is greater than a threshold, the RRC configures a first value, a second value, or a third value in the CSI aperiodic trigger state (CSI-AperiodicTriggerState) CSI-associated report configuration information (CSI-AssociatedReportConfigInfo) for each CSI-RS resource set or CSI-RS resource (depending on the terminal device capability) when it is provided.

[0349] If the offset between the last symbol of the PDCCH carrying the triggering DCI and the first symbol of the aperiodic CSI-RS resource in the aperiodic CSI-RS resource set is less than a threshold,

[0350] If there is no DL signal in the same symbol as the aperiodic CSI-RS, if the terminal device is in FR1, or if the terminal device reports that it has the capability to support two default beams in FR2, the higher layer configures a first value or a second value when providing the higher layer configuration for the aperiodic CSI-RS resource or aperiodic CQI-RS resource set. When the higher layer configures the first value, the transmission of the aperiodic CSI-RS uses the first candidate TCI; when the higher layer configures the first value, the transmission of the aperiodic CSI-RS uses the second candidate TCI; otherwise, the transmission of the aperiodic CSI-RS uses the first candidate TCI.

[0351] If there is a DL signal in the same symbol as the aperiodic CSI-RS, if there is any other DL signal with an indicated TCI state in the same symbol as the CSI-RS, the terminal device also applies the QCL assumption of the other DL signal when receiving the aperiodic CSI-RS. The other DL signal refers to the scheduled PDSCH, periodic CSI-RS, semi-persistent CSI-RS, or aperiodic CSI-RS with a scheduling time greater than or equal to a threshold. If there are two PDSCHs with indicated TCI states in the same symbol as the AP CSI-RS, the higher layer configures a first value or a second value when providing the higher layer configuration for the AP CSI-RS resource or aperiodic CSI-RS resource set. When the higher layer configures the first value, the transmission of the AP CSI-RS uses the first candidate TCI; when the higher layer configures the second value, the second candidate TCI.

[0352] Example 4: Taking the communication as a PUSCH transmission as an example, the terminal device is configured with a first candidate TCI and a second candidate TCI.

[0353] For PUSCH transmission scheduled or activated by DCI format 0_0, the higher layer configures a first value, the PUSCH is only transmitted on non-SBFD symbols. In this way, the PUSCH transmission scheduled or activated by DCI format 0_0 uses the first candidate TCI.

[0354] For type 1 configured grant PUSCH, the higher layer configures a first value, a second value or a third value. In this way, the type 1 configured grant PUSCH uses the first candidate TCI and / or the second candidate TCI. Wherein, the PUSCH transmission occasion or the PUSCH antenna port associated with the first SRS resource set for CB / NCB transmission uses the first candidate TCI. The PUSCH transmission occasion and the PUSCH antenna port associated with the second SRS resource set for CB / NCB transmission uses the second candidate TCI.

[0355] Example 5: Taking the PUCCH transmission as an example, the terminal device is configured with the first candidate TCI and the second candidate TCI.

[0356] If the higher layer configures a first value, the PUCCH uses the first candidate TCI, and the PUCCH is only transmitted on non-SBFD symbols. If the higher layer configures a second value, the PUCCH uses the second candidate TCI, and the PUCCH is only transmitted on SBFD symbols. If the higher layer configures a third value, the PDCCH is transmitted on non-SBFD symbols and SBFD symbols; wherein, when the PDCCH is transmitted on non-SBFD symbols, the first candidate TCI is used; when the PDSCH is transmitted on SBFD symbols, the second candidate TCI is used.

[0357] Example 6: Taking the SRS as an example, the terminal device is configured with the first candidate TCI and the second candidate TCI. For a periodic, semi-persistent or aperiodic SRS resource set, if the higher layer configures a first value, the SRS transmission on the SRS resource set uses the first candidate TCI; if the higher layer configures a second value, the SRS transmission on the SRS resource set uses the second candidate TCI.

[0358] When the terminal device contains two different values of the control resource set pool index (coresetPoolIndex), the first candidate TCI corresponds to the coresetPoolIndex value 0, and the second candidate TCI corresponds to the coresetPoolIndex value 1.

[0359] When the terminal device contains two different coresetPoolIndex values, and the high-layer parameter applyIndicatedCIState configures a set of aperiodic SRS resources, and the set of aperiodic SRS resources is triggered by the PDCCH on the CORESET associated with the coresetPoolIndex value, the SRS transmission on the set of aperiodic SRS resources uses the TCI state or TCI UL State specific to the coresetPoolIndex value.

[0360]

Traditional TCI state

[0361] For the traditional TCI state, the TCI indicated by the first indication information includes the TCI of one TCI codepoint. The TCI of the TCI codepoint is associated with the type of symbol in the time domain of the resource, and the TCI state of the TCI of the TCI codepoint is the traditional TCI state. Hereinafter, the TCI mentioned in this embodiment can be equivalent to the TCI state.

[0362] The following takes the TCI state ID field in the MAC CE as an example. The network device can configure the TCI state through RRC, for example, the network device configures up to 128 TCI states for the terminal device through PDSCH-Config. Then, the network device can activate N (N is a positive integer) groups of TCI states from the RRC configured TCI states according to the format of the MAC CE described in FIG. 8, and indicate them to the terminal device through MAC-CE signaling. The MAC CE in FIG. 8 includes the following fields:

[0363] R field: indicates a reserved bit;

[0364] Serving Cell ID field: This field indicates the serving cell to which the MAC-CE can be applied, and occupies 5 bits;

[0365] BWP ID field: This field indicates the DL BWP to which the MAC CE is applied, and the BWP ID can be used as the codepoint of the BWP indication field in the DCI;

[0366] It should be noted that for the TCI state ID m,n in FIG. 8, the value of m is 0-N, corresponding to at most N groups of TCI states; the value of n is 1-2, corresponding to one or two TCI states in a group of TCI states. The TCI state ID m,nThe m corresponding to the n-th TCI state in the set of TCI states can be represented. Thus, the network device can configure up to 8 sets of TCI states for the terminal device through the MAC CE, each set of TCI states including one or two TCI states, and each set of TCI states occupying two consecutive octets (Octets) in the MAC CE, one octet including 8 bits.

[0367] For each set of TCI states including two TCI states, the 1st TCI state in the two TCI states is indicated to exist or not exist by the Ci field, and the 2nd TCI state is indicated to exist or not exist by 1 bit.

[0368] The 1st set of TCI states in FIG. 8 occupies Oct 3 and Oct 4, and the two TCI states in the 1st set of TCI states are denoted as TCI state ID 0,1 and TCI state ID 0,2 , respectively. Among them, TCI state ID 0,1 is indicated to exist or not exist by the C0 field, and the S0 field in Oct 3 indicates whether TCI state ID 0,2 exists. It can be understood that Oct 3 and Oct 4 are optional bytes when the network device configures the MAC CE to the terminal device. For example, when C0 = 0, it can be represented that TCI state ID 0,1 does not exist; when C0 = 1, it can be represented that TCI state ID 0,1 exists; when S0 = 0, it can be represented that TCI state ID 0,2 does not exist; and when S0 = 1, it can be represented that TCI state ID 0,2 exists.

[0369] Finally, the network device can indicate one set of TCI states in the multiple sets of TCI states configured by the MAC CE to the terminal device through the DCI. For example, for the network device configuring 8 sets of TCI states through the MAC CE, the network device can include 3 bits in the DCI, the value range of the 3 bits is 0-7, 1 value can also be denoted as 1 code point, and 1 code point corresponds to one set of TCI states in the MAC CE. When the 3 bits are 000, the 3 bits correspond to the 1st set of TCI states in the MAC CE with m taking 0; when the 3 bits are 001, the 3 bits correspond to the 2nd set of TCI states in the MAC CE with m taking 1, and so on; when the 3 bits are 111, the 3 bits correspond to the 8th set of TCI states in the MAC-CE with m taking 7. In actual application, the terminal device can communicate with two TRPs according to the two TCI states in the set of TCI states indicated by the DCI, and the two TCI states correspond to the two TRPs one by one.

[0370] It should be noted that the TCI state ID in FIG. 8 is m,1 associated with a non-SBFD symbol; the TCI state ID m,2 associated with a SBFD symbol. When the TCI state IDm,1 does not exist, the communication is only transmitted in the SBFD symbol; when the TCI state IDm,2 does not exist, the communication is only transmitted in the non-SBFD symbol. When both the TCI state IDm,1 and the TCI state IDm,2 exist, the communication is transmitted across the SBFD symbol and the non-SBFD symbol. Wherein, the TCI state ID m,1 is the first candidate TCI, the TCI state ID m,2 is the second candidate TCI.

[0371] In summary, the first indication information can indicate a group of TCIs, and the group of TCIs includes the first candidate TCI and the second candidate TCI. Wherein, the first candidate TCI is associated with a non-SBFD symbol, and the second candidate TCI is associated with a SBFD symbol.

[0372] In some possible examples, for S520, the terminal device can determine the type of the symbol in the time domain of the first TCI and the first resource according to a network configuration manner. Wherein, the network configuration manner refers to that the network device indicates / configures through high layer signaling (such as RRC signaling or MAC CE) or DCI and the like information.

[0373] In specific implementation, the determining the type of the symbol in the time domain of the first TCI and the first resource from the at least one TCI in S520 can include the following steps:

[0374] receiving second indication information, the second indication information being used for indicating the type of the symbol in the time domain of the first TCI and / or the first resource;

[0375] determining the type of the symbol in the time domain of the first TCI and the first resource according to the second indication information.

[0376] It should be noted that the second indication information can be carried by high layer signaling (such as RRC signaling or MAC CE) or DCI. In addition, for determining the type of the symbol in the time domain of the first TCI and the first resource according to the second indication information, the present embodiment exists the following cases:

[0377] In one case, if the second indication information is used to indicate the first TCI, the type of the symbol associated with the first TCI is determined to be the type of the symbol of the first resource in the time domain; this is because, since the first TCI is associated with the type of the symbol, the terminal device can determine the type of the symbol of the first resource in the time domain according to the first TCI;

[0378] In one case, if the second indication information is used to indicate the type of the symbol of the first resource in the time domain, the TCI associated with the type of the symbol of the first resource in the time domain is determined to be the first TCI; this is because, since the TCI is associated with the type of the symbol, the terminal device can determine the first TCI according to the type of the symbol of the first resource in the time domain;

[0379] In one case, the second indication information is used to indicate the first TCI and the type of the symbol of the first resource in the time domain.

[0380] In combination with the above description, the following embodiments of the present application are illustrated from the following multiple examples, in which the network device indicates the first TCI and the type of the symbol of the first resource in the time domain used by the communication transmission through high layer signaling.

[0381] Example a: taking the PDCCH in the CORESET as an example, the network device can activate the TCI state ID m,1 and TCI state ID m,2 in the mth group of TCI states for the PDCCH in one CORESET from the TCI states configured by RRC according to the MAC CE format shown in FIG. 9, and indicate the first TCI to the terminal device through the MAC CE. Wherein, the MAC CE in FIG. 9 includes the following fields:

[0382] R field: indicates a reserved bit;

[0383] Serving Cell ID field: this field indicates the service cell to which the MAC-CE can be applied, occupying 5 bits;

[0384] CORESET ID field, which indicates the CORESET ID;

[0385] C1 field, which indicates whether TCI state ID m,1 exists; wherein, when C1=0, it can indicate that TCI state ID m,1 does not exist; when C1=1, it can indicate that TCI state ID m,1 exists;

[0386] C2 field, which indicates TCI state IDm,2 present; where C2=0, it can represent TCI state ID m,2 absent; C2=1, it can represent TCI state ID m,2 present.

[0387] In this way, for TCI state ID m,1 associated with non-SBFD symbols, and TCI state ID m,2 associated with SBFD symbols, when C1=0 and C2=1, the PDCCH transmission in this CORESET uses TCI state ID m,2 , and this PDCCH is only transmitted on SBFD symbols; at this time, the first TCI is TCI state ID m,2 , and the type of the symbol in the time domain of the first resource is SBFD symbol; when C1=1 and C2=0, the PDCCH transmission in this CORESET uses TCI state ID m,1 , and this PDCCH is only transmitted on non-SBFD symbols; at this time, the first TCI is TCI state ID m,1 ; when C1=1 and C2=1, the PDCCH in this CORESET is transmitted on non-SBFD symbols and SBFD symbols, and when the PDCCH is transmitted on non-SBFD symbols, it uses TCI state ID m,1 , and when the PDCCH is transmitted on SBFD symbols, it uses TCI state ID m,2 . It is worth noting that TCI state ID m,1 is the first candidate TCI, and TCI state ID m,2 is the second candidate TCI.

[0388] Example b: taking the communication as an example of CSI-RS transmission, the RRC configuration information of the periodic CSI-RS indicates the first candidate TCI and / or the second candidate TCI for providing the QCL source and the QCL type. When the RRC configuration information indicates the first candidate TCI, the transmission of the periodic CSI-RS uses the first candidate TCI, and the periodic CSI-RS is only transmitted on the non-SBFD symbol. When the RRC configuration information indicates the second candidate TCI, the transmission of the periodic CSI-RS uses the second candidate TCI, and the periodic CSI-RS is only transmitted on the SBFD symbol. When the RRC configuration information indicates the first candidate TCI and the second candidate TCI, the periodic CSI-RS is transmitted on the non-SBFD symbol and the SBFD symbol; wherein the periodic CSI-RS uses the first candidate TCI when transmitted on the non-SBFD symbol, and the periodic CSI-RS uses the second candidate TCI when transmitted on the SBFD symbol.

[0389] For semi-persistent CSI-RS, the high layer signaling configures multiple semi-persistent CSI-RS resource sets, and then activates or deactivates through MAC CE. In specific implementation, the network device can activate multiple groups of semi-persistent CSI-RS resource sets from the TCI states configured by RRC according to the MAC CE format shown in FIG. 10, and indicate the first candidate TCI and / or the second candidate TCI used by the semi-persistent CSI-RS transmission on each group of semi-persistent CSI-RS resource sets through MAC CE signaling. Wherein, the MAC CE in FIG. 10 includes the following fields:

[0390] R field: indicates a reserved bit;

[0391] Serving Cell ID field: this field indicates the service cell to which the MAC-CE can be applied, and occupies 5 bits;

[0392] BWP ID field: this field indicates the DL BWP to which the MAC CE is applied, and the BWP ID can be used as the code point of the BWP indication field in the DCI;

[0393] SP CSI-RS resource set ID field: this field contains the index of the NZP CSI-RS ResourceSet, which indicates the semi-persistent NZP CSI-RS resource, indicates the semi-persistent NZP CSI / RS resource set that should be activated or deactivated, and the length of this field is 6 bits;

[0394] IM: This field indicates whether there is a CSI-IM resource set ID field; wherein if the IM field is set to 1, there is a semi-persistent CSI-IM resource set ID field; if the IM field is set to 0, there is no semi-persistent CSI-IM resource set ID field;

[0395] Semi-persistent CSI-IM resource set identification (SP CSI-IM resource set ID): This field contains the index of the CSI-IM resource set, which indicates the semi-persistent CSI-IM resource set that should be activated or deactivated, and the length of this field is 6 bits;

[0396] It should be noted that for the TCI state ID m,n in FIG. 10, m takes a value of 0-N, corresponding to at most N groups of TCI states; n takes a value of 1-2, corresponding to one or two TCI states in a group of TCI states. The TCI state ID m,n may represent the nth TCI state in the group of TCI states corresponding to m. Thus, the network device can configure at most 8 groups of TCI states for the terminal device through the MAC CE, each group of TCI states including one or two TCI states, and each group of TCI states occupying two consecutive bytes in the MAC-CE, one byte including 8 bits.

[0397] For each group of TCI states including two TCI states, the first TCI state in the two TCI states is indicated to exist or not exist by the Ci field, and the second TCI state is indicated to exist or not exist by 1 bit.

[0398] The first group of TCI states in FIG. 10 occupies Oct 5 and Oct 6, and the two TCI states in the first group of TCI states are denoted as TCI state ID 0,1 and TCI state ID 0,2 . Among them, the TCI state ID 0,1 is indicated to exist or not exist by the C0 field, and the S0 field in Oct 5 indicates whether the TCI state ID 0,2 exists. It can be understood that Oct 5 and Oct 6 are optional bytes when the network device configures the MAC CE for the terminal device. For example, when C0=0, it can represent that the TCI state ID 0,1 does not exist; when C0=1, it can represent that the TCI state ID 0,1 exists; when S0=0, it can represent that the TCI state ID 0,2 does not exist; and when S0=1, it can represent that the TCI state ID 0,2 exists.

[0399] In addition, the TCI state ID m,1 associated with non-SBFD symbols; the TCI state ID m,2 associated with SBFD symbols. When the TCI state IDm,1 does not exist, the semi-persistent CSI-RS is only transmitted on SBFD symbols; when the TCI state IDm,2 does not exist, the semi-persistent CSI-RS is only transmitted on non-SBFD symbols. When both the TCI state IDm,1 and the TCI state IDm,2 exist, the semi-persistent CSI-RS is transmitted on SBFD symbols and non-SBFD symbols, the semi-persistent CSI-RS uses the TCI state ID m,1 when the semi-persistent CSI-RS is transmitted on non-SBFD symbols, and the semi-persistent CSI-RS uses the TCI state ID m,2 when the semi-persistent CSI-RS is transmitted on SBFD symbols. It should be noted that the TCI state ID m,1 is the first candidate TCI, the TCI state ID m,2 is the second candidate TCI.

[0400] For aperiodic CSI-RS, the TCI of each aperiodic CSI-RS resource is configured by high-layer signaling of qcl-info and the configuration of the quasi-co-location type. The qcl-info configuration information indicates the first candidate TCI and / or the second candidate TCI, which is used to provide the QCL source and the QCL type. When the qcl-info configuration information indicates the first candidate TCI, the transmission of the aperiodic CSI-RS uses the first candidate TCI, and the aperiodic CSI-RS is only transmitted on non-SBFD symbols. When the qcl-info configuration information indicates the second candidate TCI, the transmission of the aperiodic CSI-RS uses the second candidate TCI, and the aperiodic CSI-RS is only transmitted on SBFD symbols. When the qcl-info configuration information indicates the first candidate TCI and the second candidate TCI, the aperiodic CSI-RS is transmitted on non-SBFD symbols and SBFD symbols; wherein the first candidate TCI is used when the aperiodic CSI-RS is transmitted on non-SBFD symbols, and the second candidate TCI is used when the aperiodic CSI-RS is transmitted on SBFD symbols.

[0401] Example c: taking the communication as a PUCCH transmission as an example, the network device configures multiple beams for it through RRC signaling, and activates the beam of each PUCCH resource through MAC CE. Among them, the MAC CE indicates the first candidate TCI and / or the second candidate TCI for the transmission of the PUCCH, which is used to provide the QCL source and the QCL type.

[0402] When the MAC CE indicates the first candidate TCI, the transmission of the PUCCH uses the first candidate TCI, and the PUCCH is transmitted only on non-SBFD symbols. When the MAC CE indicates the second candidate TCI, the transmission of the PUCCH uses the second candidate TCI, and the PUCCH is transmitted only on SBFD symbols. When the MAC CE indicates the first candidate TCI and the second candidate TCI, the PUCCH is transmitted on non-SBFD symbols and SBFD symbols; wherein the PUCCH uses the first candidate TCI when transmitted on non-SBFD symbols, and the PUCCH uses the second candidate TCI when transmitted on SBFD symbols.

[0403] Example d: Take the communication as a PUSCH transmission for example, the terminal device transmits using the same beam as the SRS resource indicated by the network device. For codebook-based PUSCH, there are at most two SRS resources in the corresponding SRS resource set. For non-codebook-based PUSCH, there are at most 4 SRS resources. The SRS resource used in the SRS resource set of the codebook-based or non-codebook-based PUSCH has a first candidate TCI or a second candidate TCI, which is used to provide a QCL source and a QCL type.

[0404] When the MAC CE indicates the first candidate TCI, the transmission of the PUCCH uses the first candidate TCI, and the PUCCH is transmitted only on non-SBFD symbols. When the MAC CE indicates the second candidate TCI, the transmission of the PUCCH uses the second candidate TCI, and the PUCCH is transmitted only on SBFD symbols. When the MAC CE indicates the first candidate TCI and the second candidate TCI, the PUCCH is transmitted on non-SBFD symbols and SBFD symbols; wherein the PUCCH uses the first candidate TCI when transmitted on non-SBFD symbols, and the PUCCH uses the second candidate TCI when transmitted on SBFD symbols.

[0405] Example e: Taking the communication as an example of SRS transmission, the beam (SpatialRelationInfo) used by the SRS is configured in RRC signaling. Among them, the high layer signaling configures the transmission of the SRS to use the first candidate TCI or the second candidate TCI, which is used to provide the QCL source and the QCL type. When the high layer signaling configures the first candidate TCI, the transmission of the SRS uses the first candidate TCI, and the PUSCH is transmitted only on non-SBFD symbols. When the high layer signaling configures the second candidate TCI, the transmission of the SRS uses the second candidate TCI, and the SRS is transmitted only on SBFD symbols. When the high layer signaling configures the first candidate TCI and the second candidate TCI, the SRS is transmitted on non-SBFD symbols and SBFD symbols; wherein the SRS is transmitted on non-SBFD symbols using the first candidate TCI, and the SRS is transmitted on SBFD symbols using the second candidate TCI.

[0406] Example f: Taking the communication as an example of PUCCH transmission, SRS transmission or PUSCH transmission, the default beam is the beam information from the time when RRC configuration to MAC-CE activation, at this time the default uplink beam of the terminal device can work normally. Among them, the TCI used to indicate the default beam is the first TCI.

[0407] For PUCCH, the network device can configure a beam (PUCCH-SpatialRelationInfo) and a path loss reference signal for each PUCCH resource. When no beam is configured, the default beam of the PUCCH can be associated with another downlink or uplink signal. Since the other downlink or uplink signal can be associated with SBFD symbols and / or non-SBFD symbols, the type of symbols of the PUCCH can be the same as the type of symbols associated with the other downlink or uplink signal, that is, the PUCCH is transmitted on the same type of symbols as the other downlink or uplink signal. For example, when no PUCCH beam is configured, the default uplink beam of the PUCCH is associated with a predefined downlink QCL source reference signal of a CORESET; if the downlink QCL source reference signal is associated with SBFD symbols, the PUCCH is transmitted on SBFD symbols.

[0408] If there is a CORESET in the serving cell where the PUCCH is located, the default beam of the PUCCH is derived from the CORESET with the smallest ID. The terminal device takes the receive beam of the reference signal of QCL typeD of the TCI state of the CORESET as the default beam of the PUCCH. Since the reference signal of QCL typeD of the TCI state of the CORESET can be associated with SBFD symbols and / or non-SBFD symbols, the type of the symbols of the PUCCH can be the same as the type of the symbols associated with the reference signal of QCL typeD of the TCI state of the CORESET, i.e., the PUCCH is transmitted on the same type of symbols as the reference signal of QCL typeD of the TCI state of the CORESET. For example, the type of the symbols associated with the reference signal of QCL typeD of the TCI state of the CORESET is SBFD symbols, and the PUCCH is transmitted on SBFD symbols.

[0409] If there is no CORESET in the serving cell where the PUCCH is located, the default beam of the PUCCH is derived from the TCI state of the activated PDSCH with the smallest ID. The terminal device takes the receive beam of the reference signal of QCL typeD of the TCI state as the default beam of the PUCCH. Since the reference signal of QCL typeD of the TCI state can be associated with SBFD symbols and / or non-SBFD symbols, the type of the symbols of the PUCCH can be the same as the type of the symbols associated with the reference signal of QCL typeD of the TCI state, i.e., the PUCCH is transmitted on the same type of symbols as the reference signal of QCL typeD of the TCI state. For example, the type of the symbols associated with the reference signal of QCL typeD of the TCI state is SBFD symbols and non-SBFD symbols, and the PUCCH is transmitted on SBFD symbols and non-SBFD symbols.

[0410] For the serving cell without CORESET and without activated TCI state, no default beam of PUCCH is defined for it.

[0411] Here, it is assumed that there is reciprocity between the downlink beam and the uplink beam of the terminal, so that the receive beam of one downlink signal can be used as the transmit beam of another uplink signal.

[0412] For SRS, SRS introduces the same configuration scheme of beam and path loss reference signal as PUCCH. That is, if there is a CORESET within the activated BWP, the uplink transmission beam of SRS is derived from the CORESET with the smallest ID; otherwise, the uplink transmission beam of SRS is derived from the TCI state with the smallest ID in the TCI state of the activated PDSCH.

[0413] For PUSCH, the beam and path loss reference signal are not explicitly configured. The path loss reference signal of PUSCH is indicated by configuring the reference signal associated with the SRI domain value in RRC signaling. For the PUSCH scheduled by DCI format 0_1, the SRI always corresponds to an SRS resource, which provides the corresponding beam and path loss reference signal configuration, so there is no need to define the default beam.

[0414] The only exception is that for the case of scheduling PUSCH with DCI format 0_0, when scheduling PUSCH with DCI format 0_0 and turning on the default beam setting, both the beam and the path loss reference signal are derived from the CORESET with the smallest ID. At this time, the terminal device takes the beam of the reference signal of QCL typeD of the TCI state of the CORESET as the default beam of PUSCH. Since the reference signal of QCL typeD of the TCI state of the CORESET can be associated with SBFD symbols and / or non-SBFD symbols, the type of the symbols of the PUSCH can be the same as the type of the symbols associated with the reference signal of QCL typeD of the TCI state of the CORESET, that is, the PUSCH is transmitted on the same type of symbols as the reference signal of QCL typeD of the TCI state of the CORESET. It is worth noting that this case applies when the activated BWP does not configure PUCCH resources, or all PUCCH resources are not configured with beams. If at least one PUCCH resource is configured with a beam and the default beam setting is turned off, the terminal device determines the default beam according to the R15 scheme. Since the default beam can be associated with SBFD symbols and / or non-SBFD symbols, the type of the symbols of the PUSCH can be the same as the type of the symbols associated with the default beam, that is, the PUSCH is transmitted on the same type of symbols as the default beam.

[0415]

Mode B

[0416] In "Mode B", the embodiment considers that the TCI is not associated with the type of symbols in the time domain of the resource. In this way, the terminal device or the network device needs to determine the type of symbols in the time domain of the first resource and the first TCI, respectively.

[0417] For the type of the symbol of the first resource in the time domain, the embodiment can adopt the above-mentioned "method one" or "method two" to determine the type of the symbol of the first resource in the time domain, and details are not repeated here.

[0418] For the first TCI, the network device can configure / indicate the first TCI used by the communication transmission to the terminal device, and realize the network configuration / indication of the first TCI.

[0419] For example, the network device can configure at least one TCI to the terminal device through RRC, then activate the TCI to the terminal device through MAC CE, and finally indicate the first TCI used by the communication transmission to the terminal device through DCI.

[0420] Taking the second information indicating at least one TCI and the first activation information activating the first TCI as an example, the network device sends the second information to the terminal device, and the corresponding terminal device receives the second information; the network device sends the first activation information to the terminal device, and the corresponding terminal device receives the first activation information. Optionally, the second information is carried by MAC CE, and the first activation information is carried by DCI.

[0421] In this way, since the second information and the first activation information are sent by the network device, the network indicates the first TCI used by the communication transmission through the second information and the first activation information.

[0422] It should be noted that the network device can first send the second information and then send the first activation information. Alternatively, the network device can send the second information and the first activation information at the same time. Alternatively, the second information and the first activation information can be in the same signaling or different signaling. In addition, before communicating through the channel on the resource used for communication, the network device can send the second information and the first activation information, and the corresponding terminal device receives the second information and the first activation information. For example, in FIG. 3, the network device sends the second information and the first activation information to the terminal device before S310.

[0423]

Scheme 3

[0424] In "Scheme 3", the embodiment can consider that the terminal device communicates with a single TRP. When implemented, the embodiment can regard the network device mentioned in the above-mentioned "Scheme 1" or "Scheme 2" as a single TRP.

[0425] For example, in S210 of FIG. 2, for the terminal device, the terminal device communicates with the single TRP on the first resource through the first channel, which can be regarded as that the terminal device communicates with a single TRP on the first resource through the first channel; for the TRP, the TRP communicates with the terminal device on the first resource through the first channel, which can be regarded as that the TRP communicates with the terminal device on the first resource through the first channel. For another example, in S310 of FIG. 3, for the terminal device, the terminal device communicates with the single TRP on the first resource through the first channel based on the first TCI, which can be regarded as that the terminal device communicates with a single TRP on the first resource through the first channel based on the first TCI; for the TRP, the TRP communicates with the terminal device on the first resource through the first channel based on the first TCI, which can be regarded as that the TRP communicates with the terminal device on the first resource through the first channel based on the first TCI.

[0426] It should be noted that the process of the terminal device communicating with the single TRP in the scenario of introducing SBFD in the TDD system can be seen from the above-mentioned "solution 1" or "solution 2", and will not be described here.

[0427]

Solution 4

[0428] In "solution 4", the embodiment can consider the process of the terminal device communicating with multiple TRPs in multiple time slots in the scenario of introducing SBFD in the TDD system.

[0429] For the process of the terminal device communicating with multiple TRPs in multiple time slots in the scenario of introducing SBFD in the TDD system, when the terminal device needs to communicate with multiple TRPs through the same signal on the same resource and the same channel (such as multiple time slot uplink repeated transmission, multiple time slot downlink repeated transmission, multiple time slot uplink periodic transmission, multiple time slot downlink periodic transmission, multiple time slot PUSCH / PUCCH, or multiple time slot TBoMS transmission), the multiple TRPs and the terminal device can determine the resource used for the communication. The resource used for the communication is in the available resource, and the available resource occupies multiple time slots in the time domain. In this way, the terminal device can communicate with multiple TRPs on the resource used for the communication through the same channel and the same signal.

[0430] It should be noted that the resource used for the communication occupies one or more time slots in the time domain. The resource used for the communication can be a part of the available resource or all of the available resource. In addition, the time slots occupied by the resource used for the communication in the time domain can be a part of the time slots occupied by the available resource in the time domain or all of the time slots, or the time slots occupied by the resource used for the communication in the time domain can be continuous or discontinuous.

[0431] The type of symbol in the time domain of the resource used for the communication can be an SBFD symbol, or the type of symbol in the time domain of the resource used for the communication can be a non-SBFD symbol, or the type of symbol in the time domain of the resource used for the communication can be an SBFD symbol and a non-SBFD symbol.

[0432] In addition, the terminal device communicates with the plurality of TRPs through a channel on the resource used for the communication, which can be that the terminal device transmits signals / data through an uplink channel on the resource used for the communication, and the plurality of TRPs receive the signals / data; or can be that the plurality of TRPs transmit signals / data through a downlink channel on the resource used for the communication, and the terminal device receives the signals / data.

[0433] The following takes the resource used for the communication as the first resource as an example to illustrate the process of multi-slot communication between the terminal device and the plurality of TRPs in the scenario of introducing SBFD in the TDD system, as shown in FIG. 11. FIG. 11 is a flowchart of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0434] S1110. Communicate with the plurality of TRPs through a first channel on a first resource, wherein the first resource occupies one or more slots in the time domain; the first resource is an SBFD symbol in the time domain, or the first resource is a non-SBFD symbol in the time domain; or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

[0435] It can be seen that if the first resource is an SBFD symbol in the time domain, it means that the type of symbol in the time domain of the first resource is an SBFD symbol, so as to realize that the terminal device or the plurality of TRPs only communicate on the SBFD symbol. In this way, the plurality of TRPs can realize uplink transmission and downlink transmission through the SBFD symbol, or the terminal device can realize uplink transmission or downlink transmission through the SBFD symbol. In addition, compared with the case of using multiple symbol types, the different symbol types have different frequency domain resources, transmission parameters (such as power control), and TCI, and only multi-slot communication on the SBFD symbol type can simplify the scheduling parameters and transmission and reception processing.

[0436] If the first resource is a non-SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is a non-SBFD symbol, so as to realize that the terminal device or the plurality of TRPs communicates only on the non-SBFD symbol. In this way, the terminal device or the plurality of TRPs can realize uplink transmission or downlink transmission through the non-SBFD symbol. In addition, compared with the case where different symbol types are used, the multi-time slot communication on only one symbol type, i.e., the non-SBFD symbol, can simplify the scheduling parameters and the transmission and reception processing due to the differences in the frequency domain resources, transmission parameters (such as power control), and TCI in different symbol types.

[0437] If the first resource is a SBFD symbol and a non-SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is a SBFD symbol and a non-SBFD symbol, so as to realize that the terminal device or the plurality of TRPs communicates on the SBFD symbol and the non-SBFD symbol. In this way, the plurality of TRPs can realize uplink transmission and downlink transmission through the SBFD symbol and the non-SBFD symbol, or the terminal device can realize uplink transmission or downlink transmission through the SBFD symbol and the non-SBFD symbol. In addition, the communication on the SBFD symbol and the non-SBFD symbol can complete the transmission of signals / data as soon as possible and reduce the transmission delay.

[0438] In some possible examples, the present embodiment can be exemplarily described in at least one of the following manners to determine the type of the symbol in the time domain occupied by the resource used for communication in the time domain.

[0439]

Manner 1

[0440] In the "Manner 1", the communication is associated with the type of the symbol of the first resource in the time domain. The "Manner 1" can be specifically seen in the above "Manner I", and thus no further description is given.

[0441]

Manner 2

[0442] In the "Manner 2", the network device can directly indicate the terminal device with the type of the symbol of the first resource in the time domain. The "Manner 2" can be specifically seen in the above "Manner II", and thus no further description is given.

[0443]

Scheme 5

[0444] The network device can configure at least one TCI for uplink transmission and / or downlink transmission, and the TCI has a TCI state. The TCI state can indicate the reception parameter of the physical downlink channel or the downlink signal, or can indicate the transmission parameter of the physical uplink channel or the uplink signal. In addition, when the QCL type of the TCI state is QCL typeD, the TCI state is used to indicate the beam.

[0445] Based on this, in Scheme 5, for the process of multi-slot communication between a terminal device and multiple TRPs in the scenario of introducing SBFD in a TDD system, when the terminal device needs to communicate with multiple TRPs on the same resource and the same channel (such as multi-slot uplink repeated transmission, multi-slot downlink repeated transmission, multi-slot uplink periodic transmission, multi-slot downlink periodic transmission, multi-slot PUSCH / PUCCH, or multi-slot TBoMS transmission), the multiple TRPs and the terminal device can determine the resource used for the communication and determine the multiple TCIs used for the communication transmission. The resource used for the communication occupies one or more slots in the time domain. The resource used for the communication can be a part of the available resources or all of the available resources. In addition, the slots occupied by the resource used for the communication in the time domain can be a part of the slots occupied by the available resources in the time domain or all of the slots occupied by the available resources in the time domain, or the slots occupied by the resource used for the communication in the time domain can be continuous or discontinuous.

[0446] It should be noted that the resource used for the communication occupies one or more slots in the time domain. The resource used for the communication can be a part of the available resources or all of the available resources. In addition, the slots occupied by the resource used for the communication in the time domain can be a part of the slots occupied by the available resources in the time domain or all of the slots occupied by the available resources in the time domain, or the slots occupied by the resource used for the communication in the time domain can be continuous or discontinuous.

[0447] In addition, the type of the symbol in the time domain used for the communication can be an SBFD symbol, or the type of the symbol in the time domain used for the communication can be a non-SBFD symbol, or the type of the symbol in the time domain used for the communication can be an SBFD symbol and a non-SBFD symbol.

[0448] The following embodiment takes the case that the multiple TRPs include a first TRP and a second TRP, and the multiple TCIs include a first TCI and a second TCI as an example for specific description.

[0449] In this way, the terminal device can communicate with the first TRP through the channel on the resource used for the communication based on the first TCI, and communicate with the second TRP through the channel on the resource used for the communication based on the second TCI, thereby realizing multi-slot communication between the terminal device and multiple TRPs in the scenario of introducing SBFD in a TDD system.

[0450] The following takes the resource used for the communication as the first resource as an example to illustrate the process of multi-slot communication between a terminal device and a first TRP and a second TRP in the scenario of introducing SBFD in a TDD system, as shown in FIG. 12. FIG. 12 is a flowchart of another communication method according to an embodiment of the present application, which specifically includes the following steps:

[0451] S1210. communicate with the first TRP over the first channel on the first resource based on the first TCI and communicate with the first TRP over the first channel on the first resource based on the second TCI, wherein the first resource occupies one or more slots in the time domain; the first resource is a SBFD symbol in the time domain, or the first resource is a non-SBFD symbol in the time domain; or the first resource is a SBFD symbol and a non-SBFD symbol in the time domain.

[0452] It can be seen that the first TCI, the second TCI, the first resource and the first channel are used to realize multi-slot communication between the terminal device and the first TRP and the second TRP in the scenario of introducing SBFD in the TDD system.

[0453] If the first resource is a SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is a SBFD symbol, so as to realize that the terminal device or the plurality of TRPs only communicate on the SBFD symbol. In this way, the plurality of TRPs can realize uplink transmission and downlink transmission through the SBFD symbol, or the terminal device can realize uplink transmission or downlink transmission through the SBFD symbol. In addition, compared with the case of using multiple symbol types, the frequency domain resources, transmission parameters (such as power control), TCIs in different symbol types are different, and only multi-slot communication on the SBFD symbol type can simplify scheduling parameters and transmission and reception processing.

[0454] If the first resource is a non-SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is a non-SBFD symbol, so as to realize that the terminal device or the plurality of TRPs only communicate on the non-SBFD symbol. In this way, the terminal device or the plurality of TRPs can realize uplink transmission or downlink transmission through the non-SBFD symbol. In addition, compared with the case of using multiple symbol types, the frequency domain resources, transmission parameters (such as power control), TCIs in different symbol types are different, and only multi-slot communication on the non-SBFD symbol type can simplify scheduling parameters and transmission and reception processing.

[0455] If the first resource is a SBFD symbol and a non-SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is a SBFD symbol and a non-SBFD symbol, so as to realize that the terminal device or the plurality of TRPs communicate on the SBFD symbol and the non-SBFD symbol. In this way, the plurality of TRPs can realize uplink transmission and downlink transmission through the SBFD symbol and the non-SBFD symbol, or the terminal device can realize uplink transmission or downlink transmission through the SBFD symbol and the non-SBFD symbol. In addition, communication on the SBFD symbol and the non-SBFD symbol can complete signal / data transmission as soon as possible and reduce transmission delay.

[0456] The following embodiment determines the type of the symbol in the time domain of the first resource of the first TCI and the first resource from the following way.

[0457]

Way a

[0458] In "way a", the embodiment considers the association of TCI and the type of the symbol in the time domain of the resource. Wherein, the association of TCI and the type of the symbol in the time domain of the resource can be network configured, network indicated or default. Wherein, the default association rule can be predefined by the standard protocol.

[0459] For example, for network configuration, taking the MAC CE indicating the association of TCI and the type of the symbol in the time domain of the resource as an example, the structure of the MAC CE is shown in Figure 13, the MAC CE includes the following fields:

[0460] Serving Cell ID field: this field indicates the identification of the serving cell to which the MAC CE applies;

[0461] DL BWP ID field: this field indicates the DL BWP to which the MAC CE applies;

[0462] UL BWP ID field: this field indicates the UL BWP to which the MAC CE applies;

[0463] D / U field: this field indicates whether the TCI state ID in the same byte is used for joint / downlink or uplink TCI state; if the field is set to 1, the TCI state ID in the same byte is used for joint / downlink TCI state; if this field is set to 0, the TCI state ID in the same byte is used for uplink TCI state;

[0464] Symbol Type field; this field indicates that the TCI state activated by the MAC CE is associated with SBFD symbol or non-SBFD;

[0465] Reserved (R) field: indicates reserved bits, set to 0;

[0466] Pi (i = 1, 2, …, 8) field: this field indicates that the i-th TCI code point includes multiple TCI states or one TCI state;

[0467] TCI state ID field: this field indicates the TCI state identification.

[0468] For example, the default association rule is as follows: for a plurality of TCIs configured by the network device, a first TCI in the plurality of TCIs is associated with SBFD symbols, a second TCI in the plurality of TCIs is associated with non-SBFD symbols, and a third TCI in the plurality of TCIs is associated with SBFD symbols and non-SBFD symbols.

[0469] In the case where the TCI is associated with the type of symbol of the resource in the time domain, the following embodiment specifically describes the TCI and the type of symbol of the first resource in the time domain used by the communication transmission.

[0470] The process of the terminal device and the first TRP and the second TRP performing multi-slot communication in the scenario of introducing SBFD in the TDD system is exemplarily illustrated, as shown in FIG. 14. Wherein, FIG. 14 is a flowchart of another communication method according to the embodiment of the present application, specifically including the following steps:

[0471] S1410. The network device sends third indication information, and the third indication information is used to indicate a plurality of TCIs, and the plurality of TCIs are associated with the type of symbol of the resource in the time domain;

[0472] S1420. The terminal device determines a first TCI, a second TCI and the type of symbol of the first resource in the time domain from the plurality of TCIs;

[0473] S1430. The same as S1210, and details are not repeated here.

[0474] It should be noted that the TCI indicated by the third indication information can include a TCI of a TCI code point. Wherein, the TCI of the TCI code point is associated with the type of symbol of the resource in the time domain, and the TCI state of the TCI of the TCI code point is a unified TCI state. Hereinafter, the TCI mentioned in the embodiment can be equivalent to the TCI state.

[0475] The following takes the field in the MAC CE as an example for specific description. Wherein, the MAC CE is used to activate / deactivate the unified TCI state, and the MAC CE can activate a TCI of a TCI code point. Wherein, the TCI of the TCI code point can include four TCIs or two TCIs, or the TCI state of the TCI code point can include four TCI states or two TCI states.

[0476] It should be noted that when the TCI of the TCI codepoint includes four TCIs, the TCI states of the four TCIs can be separate TCI states or joint TCI states. In addition, the first TRP corresponds to two of the four TCIs, and the second TRP corresponds to the remaining two of the four TCIs. Among them, one of the two TCIs corresponding to the first TRP is associated with non-SBFD symbols, and the other is associated with SBFD symbols. One of the two TCIs corresponding to the second TRP is associated with non-SBFD symbols, and the other is associated with SBFD symbols.

[0477] When the TCI of the TCI codepoint includes two TCIs, the first TRP corresponds to one of the two TCIs, and the second TRP corresponds to the other of the two TCIs. One of the two TCIs is associated with non-SBFD symbols and SBFD symbols, and the other is associated with non-SBFD symbols and SBFD symbols. In addition, each of the two TCIs contains 2 QCL typeD.

[0478] Taking the TCI of a TCI codepoint including four TCIs as an example, as shown in FIG. 15, in (a) of FIG. 15, for separate TCI states, a TCI codepoint includes one of uplink TCI state 1_1 or downlink TCI state 1_1, one of uplink TCI state 1_2 or downlink TCI state 1_2, one of uplink TCI state 2_1 or downlink TCI state 2_1, and one of uplink TCI state 2_2 or downlink TCI state 2_2. Among them, uplink TCI state 1_1, downlink TCI state 1_1, uplink TCI state 1_2 and downlink TCI state 1_2 correspond to the first TRP, and uplink TCI state 2_1, downlink TCI state 2_1, uplink TCI state 2_2 and downlink TCI state 2_2 correspond to the second TRP. In addition, uplink TCI state 1_1 and downlink TCI state 1_1 are associated with non-SBFD symbols, uplink TCI state 1_2 and downlink TCI state 1_2 are associated with SBFD symbols, uplink TCI state 2_1 and downlink TCI state 2_1 are associated with non-SBFD symbols, and uplink TCI state 2_2 and downlink TCI state 2_2 are associated with SBFD symbols.

[0479] In (b) of FIG. 15, for the joint TCI state, one TCI codepoint includes joint TCI state 1_1, joint TCI state 1_2, joint TCI state 2_1 and joint TCI state 2_2. Among them, joint TCI state 1_1 and joint TCI state 1_2 correspond to the first TRP, and joint TCI state 2_1 and joint TCI state 2_2 correspond to the second TRP. In addition, joint TCI state 1_1 and joint TCI state 2_1 are associated with non-SBFD symbols, and joint TCI state 1_2 and joint TCI state 2_2 are associated with SBFD symbols.

[0480] In summary, the third indication information can indicate the TCI of one TCI codepoint, and the TCI of the TCI codepoint includes four TCIs or two TCIs. When the TCI of the TCI codepoint includes four TCIs, the four TCIs are the first non-SBFD candidate TCI, the first SBFD candidate TCI, the second non-SBFD candidate TCI and the second SBFD candidate TCI. Among them, the first non-SBFD candidate TCI and the second SBFD candidate TCI correspond to the first TRP, and the first SBFD candidate TCI and the second non-SBFD candidate TCI correspond to the second TRP. The first non-SBFD candidate TCI and the second non-SBFD candidate TCI are associated with non-SBFD symbols, and the first SBFD candidate TCI and the second SBFD candidate TCI are associated with SBFD symbols.

[0481] In addition, the first non-SBFD candidate TCI and the first SBFD candidate TCI can form a pair, and the second non-SBFD candidate TCI and the second SBFD candidate TCI can form a pair. At this time, the activated TCI of one TCI codepoint can include the first candidate TCI pair and the second candidate TCI pair. Among them, the first candidate TCI pair includes the first non-SBFD candidate TCI and the first SBFD candidate TCI, and the second candidate TCI pair includes the second non-SBFD candidate TCI and the second SBFD candidate TCI.

[0482] Optionally, the TCI state of the first non-SBFD candidate TCI is a separate downlink TCI state, a separate uplink TCI state or a joint TCI state.

[0483] Optionally, the TCI state of the first SBFD candidate TCI is a separate downlink TCI state, a separate uplink TCI state or a joint TCI state.

[0484] Optionally, the TCI state of the second non-SBFD candidate TCI is a separate DL TCI state, a separate UL TCI state, or a joint TCI state.

[0485] Optionally, the TCI state of the second SBFD candidate TCI is a separate DL TCI state, a separate UL TCI state, or a joint TCI state.

[0486] Optionally, the first non-SBFD candidate TCI is associated with a non-SBFD symbol, which can be configured by a network device or specified by a standard protocol.

[0487] Optionally, the first SBFD candidate TCI is associated with a SBFD symbol, which can be configured by a network device or specified by a standard protocol.

[0488] Optionally, the second non-SBFD candidate TCI is associated with a non-SBFD symbol, which can be configured by a network device or specified by a standard protocol.

[0489] Optionally, the second SBFD candidate TCI is associated with a SBFD symbol, which can be configured by a network device or specified by a standard protocol.

[0490] In some possible examples, for S1420, the terminal device can determine the first TCI, the second TCI, and the type of the symbol of the first resource in the time domain according to a network configuration manner. The network configuration manner refers to that the network device indicates / configures through RRC signaling, MAC signaling (such as MAC CE), or DCI, and the like.

[0491] In a specific implementation, the terminal device in S1420 determines the first TCI, the second TCI, and the type of the symbol of the first resource in the time domain from the plurality of TCIs, which can include the following steps:

[0492] The terminal device receives fourth indication information, and the fourth indication information is used to indicate at least one of the first TCI, the second TCI, or the type of the symbol of the first resource in the time domain.

[0493] The terminal device determines the first TCI, the second TCI, and the type of the symbol of the first resource in the time domain according to the fourth indication information.

[0494] It should be noted that the fourth indication information can be carried by high-layer signaling (such as RRC signaling or MAC CE) or DCI, and the like. In addition, for determining the first TCI, the second TCI, and the type of the symbol of the first resource in the time domain according to the second indication information, the following cases exist in the embodiment:

[0495] In a case where the fourth indication information is used to indicate the first TCI and the second TCI, the type of the symbol associated with the first TCI or the second TCI is determined as the type of the symbol in the time domain of the first resource; this is because, since the first TCI or the second TCI is associated with the type of the symbol, and the type of the symbol associated with the first TCI is the same as the type of the symbol associated with the second TCI, the terminal device can determine the type of the symbol in the time domain of the first resource according to the first TCI or the second TCI.

[0496] In a case where the second indication information is used to indicate the type of the symbol in the time domain of the first resource, the TCI associated with the type of the symbol in the time domain of the first resource is determined as the first TCI and the second TCI; this is because, since the TCI is associated with the type of the symbol, and the type of the symbol associated with the first TCI is the same as the type of the symbol associated with the second TCI, the terminal device can determine the first TCI and the second TCI according to the type of the symbol in the time domain of the first resource.

[0497] In a case where the second indication information is used to indicate the type of the symbol in the time domain of the first resource, the TCI associated with the type of the symbol in the time domain of the first resource is determined as the first TCI and the second TCI; this is because, since the TCI is associated with the type of the symbol, and the type of the symbol associated with the first TCI is the same as the type of the symbol associated with the second TCI, the terminal device can determine the first TCI and the second TCI according to the type of the symbol in the time domain of the first resource.

[0498] For example, taking the four TCIs indicated by the third indication information as the first non-SBFD candidate TCI, the first SBFD candidate TCI, the second non-SBFD candidate TCI, and the second SBFD candidate TCI, the fourth indication information includes at least one of the following options:

[0499] Option 1: one of the first non-SBFD value, the second non-SBFD value, or the third non-SBFD value;

[0500] Option 2: one of the first SBFD value, the second SBFD value, or the third SBFD value;

[0501] Option 3: one of the first non-SBFD value, the second non-SBFD value, or the third non-SBFD value, and one of the first SBFD value, the second SBFD value, or the third SBFD value.

[0502] The first non-SBFD value indicates the first non-SBFD candidate TCI, and / or the type of the symbol is a non-SBFD symbol; at this time, the type of the symbol in the time domain of the first resource is a non-SBFD symbol; in this way, the terminal device only performs the communication on the non-SBFD symbol.

[0503] It should be noted that, since the first non-SBFD candidate TCI is associated with the non-SBFD symbol, when the first non-SBFD value only indicates the first non-SBFD candidate TCI, according to the association, it can be determined that the type of the symbol of the first resource in the time domain is the non-SBFD symbol; or, when the first non-SBFD value only indicates that the type of the symbol is the non-SBFD symbol, according to the association, it can be determined that the first non-SBFD candidate TCI. Optionally, the time points in other symbol types are discarded or postponed, for example, the transmission or reception time points in the SBFD symbol are discarded or postponed.

[0504] The second non-SBFD value indicates the second non-SBFD candidate TCI, and / or the type of the symbol is the non-SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is the non-SBFD symbol; in this way, the terminal device only performs the communication on the non-SBFD symbol.

[0505] It should be noted that, since the second non-SBFD candidate TCI is associated with the non-SBFD symbol, when the second non-SBFD value only indicates the second non-SBFD candidate TCI, according to the association, it can be determined that the type of the symbol of the first resource in the time domain is the non-SBFD symbol; or, when the second non-SBFD value only indicates that the type of the symbol is the non-SBFD symbol, according to the association, it can be determined that the second non-SBFD candidate TCI. Optionally, the time points in other symbol types are discarded or postponed, for example, the transmission or reception time points in the SBFD symbol are discarded or postponed.

[0506] The third non-SBFD value indicates the first non-SBFD candidate TCI and the second non-SBFD candidate TCI, and / or the type of the symbol is the non-SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is the non-SBFD symbol; in this way, the terminal device only performs the communication on the non-SBFD symbol. Optionally, the time points in other symbol types are discarded or postponed, for example, the transmission or reception time points in the SBFD symbol are discarded or postponed. The third non-SBFD value can be represented by both (all).

[0507] The first SBFD value indicates the first SBFD candidate TCI, and / or the type of the symbol is the SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is the SBFD symbol; in this way, the terminal device only performs the communication on the SBFD symbol.

[0508] It should be noted that, since the first SBFD candidate TCI is associated with the SBFD symbol, when the first SBFD value only indicates the first SBFD candidate TCI, the type of the symbol of the first resource in the time domain can be determined as the SBFD symbol according to the association; or, when the first SBFD value only indicates that the type of the symbol is the SBFD symbol, the first SBFD candidate TCI can be determined according to the association. Optionally, the time points in other symbol types are discarded or postponed, for example, the transmission or reception time points in the non-SBFD symbol are discarded or postponed.

[0509] The second SBFD value indicates the second SBFD candidate TCI, and / or the type of the symbol is the SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is the SBFD symbol; in this way, the terminal device only performs the communication on the SBFD symbol.

[0510] It should be noted that, since the second SBFD candidate TCI is associated with the SBFD symbol, when the second SBFD value only indicates the second SBFD candidate TCI, the type of the symbol of the first resource in the time domain can be determined as the SBFD symbol according to the association; or, when the second SBFD value only indicates that the type of the symbol is the SBFD symbol, the second SBFD candidate TCI can be determined according to the association. Optionally, the time points in other symbol types are discarded or postponed, for example, the transmission or reception time points in the non-SBFD symbol are discarded or postponed.

[0511] The third SBFD value indicates the first SBFD candidate TCI and the second SBFD candidate TCI, and / or the type of the symbol is the SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is the SBFD symbol; in this way, the terminal device only performs the communication on the SBFD symbol. Optionally, the time points in other symbol types are discarded or postponed, for example, the transmission or reception time points in the non-SBFD symbol are discarded or postponed. The third SBFD value can be represented by both (all).

[0512] The first non-SBFD value and the first SBFD value indicate the first non-SBFD candidate TCI and the first SBFD candidate TCI, and / or the type of the symbol is the non-SBFD symbol and the SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is the non-SBFD symbol and the SBFD symbol; in this way, the terminal device performs the communication on the non-SBFD symbol and the SBFD symbol. The first non-SBFD candidate TCI is used when the communication is performed on the non-SBFD symbol, and the first SBFD candidate TCI is used when the communication is performed on the SBFD symbol.

[0513] The second non-SBFD value and the second SBFD value indicate the second non-SBFD candidate TCI and the second SBFD candidate TCI, and / or the type of the symbol is the non-SBFD symbol and the SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is the non-SBFD symbol and the SBFD symbol; in this way, the terminal device performs the communication on the non-SBFD symbol and the SBFD symbol. The second non-SBFD candidate TCI is used when communicating on the non-SBFD symbol, and the second SBFD candidate TCI is used when communicating on the SBFD symbol.

[0514] The first non-SBFD value and the second SBFD value indicate the first non-SBFD candidate TCI and the second SBFD candidate TCI, and / or the type of the symbol is the non-SBFD symbol and the SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is the non-SBFD symbol and the SBFD symbol; in this way, the terminal device performs the communication on the non-SBFD symbol and the SBFD symbol. The first non-SBFD candidate TCI is used when communicating on the non-SBFD symbol, and the second SBFD candidate TCI is used when communicating on the SBFD symbol.

[0515] The second non-SBFD value and the first SBFD value indicate the second non-SBFD candidate TCI and the first SBFD candidate TCI, and / or the type of the symbol is the non-SBFD symbol and the SBFD symbol; at this time, the type of the symbol of the first resource in the time domain is the non-SBFD symbol and the SBFD symbol; in this way, the terminal device performs the communication on the non-SBFD symbol and the SBFD symbol. The second non-SBFD candidate TCI is used when communicating on the non-SBFD symbol, and the first SBFD candidate TCI is used when communicating on the SBFD symbol.

[0516] For another example, taking that the TCI indicated by the third indication information includes the first candidate TCI pair and the second candidate TCI pair as an example, the fourth indication information includes at least one of the following options:

[0517] Option a: the first non-SBFD value and the first SBFD value;

[0518] Option b: the second non-SBFD value and the second SBFD value;

[0519] Option c: the third non-SBFD and the third SBFD value.

[0520] It should be noted that the explanations of the first non-SBFD value, the first SBFD value, the second non-SBFD value, the second SBFD value, the third non-SBFD value, and the third SBFD value can be found in the above description, and will not be repeated here. Notably, the difference from the above option 3 is that there is no combination of the first non-SBFD value and the second SBFD value, and no combination of the second non-SBFD value and the first SBFD value.

[0521] Option b

[0522] In "option b", the embodiment considers that the TCI is not associated with the type of symbol in the time domain of the resource. In this way, the terminal device needs to determine the type of symbol in the time domain of the first resource and the TCI used for the communication transmission respectively.

[0523] In some possible examples, the type of symbol in the time domain of the first resource is determined according to a network configuration manner for the communication. The network configuration manner means that the network device indicates / configures the first TCI and the type of symbol in the time domain of the first resource through RRC signaling, MAC signaling (such as MAC CE), or DCI information.

[0524] For example, the high-layer signaling (such as RRC signaling or MAC CE) configuration or the DCI indication is one of the following: a first value, a second value, or a third value.

[0525] The first value indicates that the type of symbol is a non-SBFD symbol; at this time, the type of symbol in the time domain of the first resource is a non-SBFD symbol; in this way, the terminal device only performs the communication on the non-SBFD symbol. Optionally, the time points in other symbol types are discarded or postponed, such as the transmission or reception time points in the SBFD symbol are discarded or postponed.

[0526] The second value indicates that the type of symbol is an SBFD symbol; at this time, the type of symbol in the time domain of the first resource is an SBFD symbol; in this way, the terminal device only performs the communication on the SBFD symbol. Optionally, the time points in other symbol types are discarded or postponed, such as the transmission or reception time points in the non-SBFD symbol are discarded or postponed.

[0527] The third value indicates that the type of symbol is an SBFD symbol and a non-SBFD symbol; at this time, the type of symbol in the time domain of the first resource is a non-SBFD symbol and an SBFD symbol. In this way, the terminal device performs the communication on the non-SBFD symbol and the SBFD symbol. The third value can be represented by both (all).

[0528] In some possible examples, the network device configures the terminal device with the TCI used for the communication transmission.

[0529] For example, the network device can configure the terminal device with the at least one TCI through RRC, activate the TCI through MAC CE, and indicate the TCI used for the communication transmission through DCI.

[0530] For example, the network device sends the third information to the terminal device, and the corresponding terminal device receives the third information; and the network device sends the second activation information to the terminal device, and the corresponding terminal device receives the second activation information. Optionally, the third information is carried by the MAC CE, and the second activation information is carried by the DCI.

[0531] In this way, the first TCI and the second TCI used for the communication transmission are indicated by the network through the third information and the second activation information, because the third information and the second activation information are sent by the network device.

[0532] It should be noted that the network device can send the third information first, and then send the second activation information. Alternatively, the network device can send the third information and the second activation information at the same time. Alternatively, the third information and the second activation information can be in the same signaling or different signaling. In addition, before the terminal device communicates through the first channel on the first resource, the network device can send the third information and the second activation information, and the corresponding terminal device receives the third information and the second activation information. For example, in FIG. 12, the network device sends the third information and the second activation information to the terminal device before S1210.

[0533] The functional units of a communication device according to the embodiment are described below.

[0534] The above mainly describes the scheme of the embodiment of the present application from the method side. It can be understood that the terminal device includes a hardware structure and / or a software module corresponding to the execution of each function in order to implement the above functions. Those skilled in the art should easily realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in the present text can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical scheme. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present embodiment.

[0535] The embodiments of the present application can divide the functional units of the terminal device according to the above method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated in one processing unit. The integrated unit can be realized in the form of hardware or in the form of a software program module. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and another division method can be used in actual implementation.

[0536] In the case of using an integrated unit, FIG. 16 is a functional unit composition block diagram of a communication apparatus according to an embodiment of the present application. The communication apparatus 1600 includes a communication unit 1601.

[0537] Optionally, the communication unit 1601 can be a module unit for communicating the power of the downlink signal and channel, and no specific limitation is made thereto. The communication unit 1601 can include a sending unit and / or a receiving unit.

[0538] Optionally, the communication apparatus 1600 can further include a storage unit for storing computer program codes or instructions executed by the communication apparatus 1600. The storage unit can be a memory.

[0539] Optionally, the communication apparatus 1600 can be a chip or a chip module.

[0540] For example, the communication unit 1601 can be integrated in a processing unit. The communication unit can be a communication interface, a transceiver, a transceiving circuit, etc.

[0541] It should be noted that the processing unit can be a processor or a controller, for example, a baseband processor, a baseband chip, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. The processing unit can realize or execute various exemplary logical blocks, modules and circuits described in combination with the disclosure. The processing unit can also be a combination realizing a computing function, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0542] Optionally, the communication apparatus 1600 is configured to perform any step(s) of the above method embodiments performed by terminal device / chip / chip module, etc.

[0543] In a particular implementation, the communication unit 1601 is configured to perform any step(s) of the above method embodiments, and when performing an action such as transmitting, the communication unit 1601 can optionally invoke other units to complete the corresponding operation(s). Details are described below.

[0544] The communication unit 1601 is configured to communicate over the first channel on the first resource, wherein the first resource occupies one or more time slots in the time domain; the first resource is an SBFD symbol in the time domain, or the first resource is a non-SBFD symbol in the time domain; or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

[0545] It can be seen that, for the scenario of introducing SBFD in a TDD system, if the first resource is an SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is an SBFD symbol, thereby realizing that the terminal device only communicates on the SBFD symbol, so that the terminal device can realize uplink transmission or downlink transmission through the SBFD symbol. Since the frequency domain of the SBFD symbol includes an uplink subband and a downlink subband, the SBFD symbol in the plurality of time slots can support uplink transmission and downlink transmission, thereby facilitating improvement of spectrum utilization and flexibility. In addition, compared with the case of using multiple symbol types, since the frequency domain resources, transmission parameters (such as power control), and TCI in different symbol types are different, communicating on only one type of symbol, i.e., the SBFD symbol, can simplify scheduling parameters and transmission and reception processing. Or,

[0546] For the scenario of introducing SBFD in a TDD system, if the first resource is a non-SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is a non-SBFD symbol, thereby realizing that the terminal device only communicates on the non-SBFD symbol. Since the non-SBFD symbol is in the uplink direction or the downlink direction, the non-SBFD symbol can support uplink transmission or downlink transmission, thereby enabling the terminal device to realize uplink transmission or downlink transmission through the non-SBFD symbol. In addition, compared with the case of using multiple symbol types, since the frequency domain resources, transmission parameters (such as power control), and TCI in different symbol types are different, communicating on only one type of symbol, i.e., the non-SBFD symbol, can simplify scheduling parameters and transmission and reception processing. Or,

[0547] For the scenario of introducing SBFD for a TDD system, if the first resource is a SBFD symbol and a non-SBFD symbol in the time domain, it is indicated that the type of the symbol of the first resource in the time domain is a SBFD symbol and a non-SBFD symbol, so as to realize communication of the terminal device on the SBFD symbol and the non-SBFD symbol, and realize uplink transmission or downlink transmission of the terminal device on the SBFD symbol and the non-SBFD symbol. In addition, communication on the SBFD symbol and the non-SBFD symbol can complete signal / data transmission as soon as possible and reduce transmission delay.

[0548] It should be noted that the specific implementation of each operation in the embodiment of FIG. 16 can be described in the method embodiments shown above, and will not be described in detail here.

[0549] Optionally, the communication unit 1601 is further configured to:

[0550] receive first information, the first information indicating the type of the symbol of the first resource in the time domain.

[0551] Optionally, the communication is associated with the type of the symbol of the first resource in the time domain; or,

[0552] the signal for the communication is associated with the type of the symbol of the first resource in the time domain.

[0553] Optionally, the communication unit 1601 is configured to:

[0554] communicate on the first resource through a first channel based on a first transmission configuration indication (TCI).

[0555] Optionally, the first TCI is associated with the type of the symbol of the first resource in the time domain.

[0556] Optionally, the first TCI is one of a first candidate TCI for the communication or a second candidate TCI for the communication, the first candidate TCI being associated with a non-SBFD symbol of the first resource in the time domain, and the second candidate TCI being associated with a SBFD symbol of the first resource in the time domain.

[0557] Optionally, the communication unit 1601 is further configured to receive second information, the second information indicating that the first TCI is associated with the type of the symbol of the first resource in the time domain.

[0558] Optionally, the second information further indicates the first TCI.

[0559] Optionally, the second information indicates that at least one TCI is associated with the type of the symbol of the resource used for communication in the time domain, and the at least one TCI includes the first TCI.

[0560] Optionally, the communication unit 1601 is further configured to:

[0561] receive first activation information, the first activation information being used to activate the first TCI.

[0562] Optionally, the communicating over the first channel on the first resource comprises:

[0563] communicating with a plurality of transmission and reception points, TRPs, over the first channel on the first resource respectively.

[0564] Optionally, the communication unit 1601 is configured to:

[0565] communicate with the first TRP over the first channel on the first resource based on the first TCI and communicate with the second TRP over the first channel on the first resource based on the second TCI.

[0566] Optionally, the first TCI and the second TCI are associated with a type of symbol in a time domain of the first resource.

[0567] Optionally, the communication unit 1601 is further configured to:

[0568] receive third information, the third information indicating that the first TCI and the second TCI are associated with a type of symbol in a time domain of the first resource.

[0569] Optionally, the third information indicates that a plurality of TCIs are associated with a type of symbol in a time domain of a resource used for communication, the plurality of TCIs including the first TCI and the second TCI.

[0570] Optionally, the communication unit 1601 is further configured to:

[0571] receive second activation information, the second activation information being used to activate the first TCI and the second TCI.

[0572] The function units of another communication apparatus of the embodiment are exemplarily described below.

[0573] The above mainly introduces the schemes of the embodiments of the present application from the method side. It can be understood that, in order to implement the above functions, the network device contains the corresponding hardware structure and / or software modules for executing various functions. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed in the present text, the embodiments can be implemented in the form of hardware or the combination of hardware and computer software. Whether a certain function is implemented in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical scheme. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the embodiments.

[0574] The embodiments of the present application can divide the functional units of the network device according to the above method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated in one processing unit. The integrated unit can be realized in the form of hardware or in the form of a software program module. It should be noted that the division of the units in the embodiments of the present application is illustrative, and is only a logical function division, and another division manner can be used in actual implementation.

[0575] In the case of using the integrated unit, FIG. 17 is a functional unit composition block diagram of another communication device according to an embodiment of the present application. The communication device 1700 includes a communication unit 1701.

[0576] Optionally, the communication unit 1701 can be a module unit for adjusting and processing the downlink signal, channel and the like, and no specific limitation is made thereto. The communication unit 1701 can include a sending unit or a receiving unit.

[0577] Optionally, the communication device 1700 can further include a storage unit for storing computer program codes or instructions executed by the communication device 1700. The storage unit can be a memory.

[0578] Optionally, the communication device 1700 can be a chip or a chip module.

[0579] For example, the communication unit 1701 can be a communication interface, a transceiver, a transceiving circuit and the like.

[0580] It should be noted that the processing unit can be a processor or a controller, for example, a baseband processor, a baseband chip, a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. The processing unit can realize or execute various exemplary logical blocks, modules and circuits described in combination with the disclosure. The processing unit can also be a combination realizing computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor and the like.

[0581] Optionally, the communication apparatus 1700 is configured to perform any step of the above method embodiments performed by a chip / chipset / network device, etc.

[0582] In a particular implementation, the communication unit 1701 is configured to perform any step of the above method embodiments, and when performing an action such as transmitting, the communication unit 1701 can optionally invoke other units to complete the corresponding operation. Details are described below.

[0583] The communication unit 1701 is configured to communicate over the first channel on the first resource, where the first resource occupies one or more time slots in the time domain; the first resource is a sub-band full duplex (SBFD) symbol in the time domain, or the first resource is a non-sub-band full duplex (non-SBFD) symbol in the time domain; or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

[0584] It can be seen that for the scenario of introducing SBFD into a TDD system, if the first resource is an SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is an SBFD symbol, thereby realizing that the network device communicates only on the SBFD symbol. Since the frequency domain resource of the SBFD symbol contains an uplink sub-band and a downlink sub-band, the SBFD symbol can support uplink transmission and downlink transmission, so that the network device can realize uplink transmission and downlink transmission through the SBFD symbol, thereby facilitating improvement of spectrum utilization and flexibility. In addition, compared with the case of using multiple symbol types due to different frequency domain resources, transmission parameters (such as power control), and TCI in different symbol types, communicating only on the SBFD symbol of one symbol type can simplify scheduling parameters and transmission and reception processing. Alternatively,

[0585] For the scenario of introducing SBFD into a TDD system, if the first resource is a non-SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is a non-SBFD symbol, thereby realizing that the network device communicates only on the non-SBFD symbol. Since the non-SBFD symbol is in the uplink direction or the downlink direction, the non-SBFD symbol in the multiple time slots can support uplink transmission or downlink transmission, thereby enabling the network device to realize uplink transmission or downlink transmission through the non-SBFD symbol in the multiple time slots. In addition, compared with the case of using multiple symbol types due to different frequency domain resources, transmission parameters (such as power control), and TCI in different symbol types, communicating on the non-SBFD symbol of one symbol type in multiple time slots can simplify scheduling parameters and transmission and reception processing. Alternatively,

[0586] For the scenario of introducing SBFD for a TDD system, if the first resource is a SBFD symbol and a non-SBFD symbol in the time domain, it is indicated that the type of the symbol of the first resource in the time domain is a SBFD symbol and a non-SBFD symbol, so that the network device communicates on the SBFD symbol and the non-SBFD symbol, and uplink transmission and / or downlink transmission is realized on the SBFD symbol and the non-SBFD symbol. In addition, communication on the SBFD symbol and the non-SBFD symbol can complete signal / data transmission as soon as possible and reduce transmission delay.

[0587] It should be noted that the specific implementation of each operation in the embodiment of FIG. 17 can be described in detail in the method embodiments described above, and will not be repeated here.

[0588] Optionally, the communication unit 1701 is further configured to:

[0589] The first information indicates the type of the symbol of the first resource in the time domain.

[0590] Optionally, the communication is associated with the type of the symbol of the first resource in the time domain; or,

[0591] The signal used for the communication is associated with the type of the symbol of the first resource in the time domain.

[0592] Optionally, the communication unit 1701 is configured to:

[0593] Based on a first transmission configuration indication (TCI), communicate on the first resource through a first channel.

[0594] Optionally, the first TCI is associated with the type of the symbol of the first resource in the time domain.

[0595] Optionally, the communication unit 1701 is further configured to: send second information, the second information indicating that the first TCI is associated with the type of the symbol of the first resource in the time domain.

[0596] Optionally, the second information further indicates the first TCI.

[0597] Optionally, the second information indicates that at least one TCI is associated with the type of the symbol of the resource used for communication in the time domain, and the at least one TCI includes the first TCI.

[0598] Optionally, the communication unit 1701 is further configured to:

[0599] Send first activation information, and the first activation information is used to activate the first TCI.

[0600] It can be seen that when each TCI in the at least one TCI is associated with the type of symbol in the time domain of the resource used for communication, and the at least one TCI includes the first TCI, the network can activate the first TCI through the first activation information, so as to determine the type of symbol in the time domain of the first resource associated with the first TCI in the time slot by activating the first TCI.

[0601] The structure of a terminal device is described below.

[0602] Referring to FIG. 18, FIG. 18 is a structural schematic diagram of a terminal device according to an embodiment of the present application. The terminal device 1800 can include a processor 1810, a memory 1820, and a communication bus for connecting the processor 1810 and the memory 1820.

[0603] Optionally, the memory 1820 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), or a compact disc read-only memory (CD-ROM). The memory 1820 is used to store program codes executed by the terminal device 1800 and transmitted data.

[0604] Optionally, the terminal device 1800 further includes a communication interface for receiving and sending data.

[0605] Optionally, the terminal device 1800 can be the first terminal device described above.

[0606] Optionally, the processor 1810 can be one or more CPUs. When the processor 1810 is a CPU, the CPU can be a single-core CPU or a multi-core CPU.

[0607] Optionally, the processor 1810 can be a baseband chip, a chip, a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

[0608] In a specific implementation process, the processor 1810 in the terminal device 1800 is configured to execute the computer program or instructions 1821 stored in the memory 1820, and perform the following operations:

[0609] communicate on the first resource through the first channel, wherein the first resource occupies one or more time slots in a time domain; the first resource is a SBFD symbol in the time domain, or the first resource is a non-SBFD symbol in the time domain; or the first resource is a SBFD symbol and a non-SBFD symbol in the time domain.

[0610] It can be seen that, for the scenario of introducing SBFD in the TDD system, if the first resource is a SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is a SBFD symbol, thereby realizing that the terminal device only communicates on the SBFD symbol, so that the terminal device can realize uplink transmission or downlink transmission through the SBFD symbol. Since the frequency domain of the SBFD symbol includes an uplink subband and a downlink subband, the SBFD symbol in the plurality of time slots can support uplink transmission and downlink transmission, thereby facilitating improvement of spectrum utilization and flexibility. In addition, compared with the case of using multiple symbol types, different symbol types have different frequency domain resources, transmission parameters (such as power control), and TCI, and only communicating on the SBFD symbol of one symbol type can simplify scheduling parameters and transmission and reception processing. Or,

[0611] For the scenario of introducing SBFD in the TDD system, if the first resource is a non-SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is a non-SBFD symbol, thereby realizing that the terminal device only communicates on the non-SBFD symbol. Since the non-SBFD symbol is in the uplink direction or the downlink direction, the non-SBFD symbol can support uplink transmission or downlink transmission, thereby enabling the terminal device to realize uplink transmission or downlink transmission through the non-SBFD symbol. In addition, compared with the case of using multiple symbol types, different symbol types have different frequency domain resources, transmission parameters (such as power control), and TCI, and only communicating on the non-SBFD symbol of one symbol type can simplify scheduling parameters and transmission and reception processing. Or,

[0612] For the scenario of introducing SBFD in the TDD system, if the first resource is a SBFD symbol and a non-SBFD symbol in the time domain, it means that the type of the symbol of the first resource in the time domain is a SBFD symbol and a non-SBFD symbol, thereby realizing that the terminal device communicates on the SBFD symbol and the non-SBFD symbol, so that the terminal device realizes uplink transmission or downlink transmission on the SBFD symbol and the non-SBFD symbol. In addition, communicating on the SBFD symbol and the non-SBFD symbol can complete signal / data transmission as soon as possible and reduce transmission delay.

[0613] It should be noted that the specific implementation of each operation can be implemented by the corresponding description of the method embodiment shown above, and the terminal device 1800 can be used to execute the above method embodiments of the present embodiment, and details are not repeated.

[0614] The structure of a network device of the present embodiment is described below.

[0615] Referring to FIG. 19, FIG. 19 is a structural schematic diagram of a network device provided by an embodiment of the present application. The network device 1900 includes a processor 1910, a memory 1920, and a communication bus for connecting the processor 1910 and the memory 1920.

[0616] Optionally, the memory 1920 includes, but is not limited to, RAM, ROM, EPROM, or CD-ROM, and the memory 1920 is used to store relevant instructions and data.

[0617] Optionally, the network device 1900 further includes a communication interface for receiving and sending data.

[0618] Optionally, the processor 1910 can be one or more CPUs, and in the case of the processor 1910 being a CPU, the CPU can be a single-core CPU or a multi-core CPU.

[0619] Optionally, the processor 1910 can be a baseband chip, a chip, a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof.

[0620] Optionally, the processor 1910 in the network device 1900 is used to execute the computer program or instructions 1921 stored in the memory 1920 to perform the following operations:

[0621] communicate through a first channel on a first resource, wherein the first resource occupies one or more time slots in the time domain; the first resource is a sub-band full duplex (SBFD) symbol in the time domain, or the first resource is a non-SBFD symbol in the time domain; or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

[0622] It can be seen that, for the scenario of introducing SBFD into the TDD system, if the first resource is an SBFD symbol in the time domain, it indicates that the type of the symbol of the first resource in the time domain is an SBFD symbol, thereby realizing that the network device communicates only on the SBFD symbol. Since the frequency domain resource of the SBFD symbol contains an uplink subband and a downlink subband, the SBFD symbol can support uplink transmission and downlink transmission, so that the network device can realize uplink transmission and downlink transmission through the SBFD symbol, thereby facilitating improvement of spectrum utilization and flexibility. In addition, compared with the case of using multiple symbol types, different symbol types have different frequency domain resources, transmission parameters (such as power control), and TCIs, and only communicating on the SBFD symbol of one symbol type can simplify scheduling parameters and transmission and reception processing. Or,

[0623] For the scenario of introducing SBFD into the TDD system, if the first resource is a non-SBFD symbol in the time domain, it indicates that the type of the symbol of the first resource in the time domain is a non-SBFD symbol, thereby realizing that the network device communicates only on the non-SBFD symbol. Since the non-SBFD symbol is in the uplink direction or the downlink direction, the non-SBFD symbol in multiple time slots can support uplink transmission or downlink transmission, thereby enabling the network device to realize uplink transmission or downlink transmission through the non-SBFD symbol in multiple time slots. In addition, compared with the case of using multiple symbol types, different symbol types have different frequency domain resources, transmission parameters (such as power control), and TCIs, and only communicating on the non-SBFD symbol of one symbol type in multiple time slots can simplify scheduling parameters and transmission and reception processing. Or,

[0624] For the scenario of introducing SBFD into the TDD system, if the first resource is an SBFD symbol and a non-SBFD symbol in the time domain, it indicates that the type of the symbol of the first resource in the time domain is an SBFD symbol and a non-SBFD symbol, thereby realizing that the network device communicates on the SBFD symbol and the non-SBFD symbol, so that the network device realizes uplink transmission and / or downlink transmission on the SBFD symbol and the non-SBFD symbol. In addition, communicating on the SBFD symbol and the non-SBFD symbol can complete signal / data transmission as soon as possible and reduce transmission delay.

[0625] It should be noted that the specific implementation of each operation can adopt the corresponding description of the method embodiment described above, and the network device 1900 can be used to execute the method embodiment of the present embodiment, and details are not described herein.

[0626] The other related content of the present embodiment is exemplarily illustrated as follows.

[0627] Optionally, the method embodiments described above can be applied in a network device or in a terminal device. That is, the execution subject of the method embodiments described above can be a network device, can be a terminal device, can be a chip, a chip module or a module, and the like, and no specific limitation is made in this regard.

[0628] Optionally, the method embodiments described above can be applied in a network device or in a network device. That is, the execution subject of the method embodiments described above can be a network device, can be a chip, a chip module or a module, and the like, and no specific limitation is made in this regard.

[0629] The embodiments of the present application also provide a chip, comprising a processor, a memory and a computer program or instructions stored in the memory, wherein the processor executes the computer program or instructions to realize the steps described in the above method embodiments.

[0630] The embodiments of the present application also provide a chip module, comprising a transceiver component and a chip, wherein the chip comprises a processor, a memory and a computer program or instructions stored in the memory, and the processor executes the computer program or instructions to realize the steps described in the above method embodiments.

[0631] The embodiments of the present application also provide a computer readable storage medium, which stores a computer program or instructions, and the computer program or instructions are executed to realize the steps described in the above method embodiments.

[0632] The embodiments of the present application also provide a computer program product, comprising a computer program or instructions, and the computer program or instructions are executed to realize the steps described in the above method embodiments.

[0633] The embodiments of the present application also provide a communication system, comprising the terminal device described above and the network device described above.

[0634] It should be noted that, for the above-mentioned various embodiments, in order to simply describe, they are all expressed as a series of action combinations. Those skilled in the art should know that the present application is not limited to the order of the actions described, because some steps in the embodiments of the present application can be performed in other order or simultaneously. In addition, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions, steps, modules or units involved are not necessarily required in the embodiments of the present application.

[0635] In the above embodiments, the description of each embodiment of the present application has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0636] The steps of a method or algorithm described in connection with the embodiments disclosed herein can be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module can reside in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable media, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium can be integral to the processor. The processor and the storage medium can reside in an ASIC. Alternatively, the processor and the storage medium can be located in a terminal device or an access device. The processor and the storage medium can also be located in any other

[0637] Those skilled in the art should clearly understand that, in one or more examples described above, the functions described in the embodiments of the present application can be implemented entirely or partially by software, hardware, firmware, or any combination thereof. When implemented by software, the functions can be implemented in the form of a computer program product entirely or partially. The computer program product includes one or more computer instructions. When loaded and executed on a computer, the computer instructions entirely or partially generate the processes or functions described in the embodiments of the present application. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer instructions can be transferred from one website, computer, server, or data center to another via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer-readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. The available media can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a digital video disc (DVD)), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0638] The various modules / units included in the various apparatuses and products described in the above embodiments can be software modules / units or hardware modules / units, or partially software modules / units and partially hardware modules / units. For example, for the various apparatuses and products applied to or integrated into a chip, the various modules / units included therein can all be implemented in the form of hardware such as circuitry, or at least some of the modules / units can be implemented in the form of a software program running on a processor integrated in the chip, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuitry; for the various apparatuses and products applied to or integrated into a chip module, the various modules / units included therein can all be implemented in the form of hardware such as circuitry, and different modules / units can be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the chip module, or at least some of the modules / units can be implemented in the form of a software program running on a processor integrated in the chip module, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuitry; for the various apparatuses and products applied to or integrated into a terminal device, the various modules / units included therein can all be implemented in the form of hardware such as circuitry, and different modules / units can be located in the same component (e.g., a chip, a circuit module, etc.) or different components of the terminal device, or at least some of the modules / units can be implemented in the form of a software program running on a processor integrated in the terminal device, and the remaining (if any) modules / units can be implemented in the form of hardware such as circuitry. The above detailed description is further intended to explain the purpose, technical solutions, and beneficial effects of the embodiments of the present application. It should be understood that the above description is merely a specific implementation of the embodiments of the present application, and is not intended to limit the protection scope of the embodiments of the present application. Any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the embodiments of the present application shall be included in the protection scope of the embodiments of the present application.

Claims

1. A communication method characterized by comprising: The method is applied to a terminal device, and the method comprises: communicating on a first resource through a first channel, wherein the first resource occupies one or more time slots in a time domain; the first resource is a sub-band full duplex (SBFD) symbol in the time domain, or the first resource is a non-SBFD symbol in the time domain, or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

2. The method of claim 1, wherein, The method further comprises: receiving first information indicating a type of a symbol of the first resource in the time domain.

3. The method of claim 1, wherein, the communication is associated with the type of the symbol of the first resource in the time domain; or a signal for the communication is associated with the type of the symbol of the first resource in the time domain.

4. The method of claim 1, wherein, The communicating on the first resource through the first channel comprises: communicating on the first resource through the first channel based on a first transmission configuration indication (TCI).

5. The method of claim 4, wherein, The first TCI is associated with the type of the symbol of the first resource in the time domain.

6. The method of claim 4, wherein, The first TCI is one of a first candidate TCI for the communication or a second candidate TCI for the communication, the first candidate TCI being associated with a non-SBFD symbol, and the second candidate TCI being associated with an SBFD symbol.

7. The method according to any one of claims 4-6, characterized in that, The method further comprises: receiving second information indicating that the first TCI is associated with the type of the symbol of the first resource in the time domain.

8. The method of claim 1, wherein, The communicating on the first resource through the first channel comprises: communicating on the first resource through the first channel with a plurality of transmission and reception points (TRPs) respectively.

9. The method of claim 8, wherein, The communicating on the first resource through the first channel with the plurality of TRPs respectively comprises: communicating on the first resource through the first channel with a first TRP based on a first TCI, and communicating on the first resource through the first channel with a second TRP based on a second TCI.

10. The method of claim 9, wherein, The first TCI and the second TCI are associated with the type of the symbol of the first resource in the time domain.

11. The method of claim 9, wherein, The method further comprises: receiving third information indicating that the first TCI and the second TCI are associated with the type of the symbol of the first resource in the time domain.

12. A communication method characterized by comprising: The method is applied to a network device, and the method comprises: communicating on a first resource through a first channel, wherein the first resource occupies one or more time slots in a time domain; the first resource is a sub-band full duplex (SBFD) symbol in the time domain, or the first resource is a non-SBFD symbol in the time domain, or the first resource is an SBFD symbol and a non-SBFD symbol in the time domain.

13. The method of claim 12, wherein, The method further comprises: sending first information indicating a type of a symbol of the first resource in the time domain.

14. The method of claim 12, wherein, the communication is associated with the type of the symbol of the first resource in the time domain; or a signal for the communication is associated with the type of the symbol of the first resource in the time domain.

15. The method of claim 12, wherein, The communicating on the first resource through the first channel comprises: communicating on the first resource through the first channel based on a first transmission configuration indication (TCI).

16. The method of claim 15, wherein, The first TCI is associated with a type of symbol in a time domain of the resource for the communication.

17. The method according to claim 15 or 16, characterized in that, The method further includes: sending second information indicating that the first TCI is associated with a type of symbol in a time domain of the first resource.

18. A communications device, characterized by comprising: a communication unit, configured to communicate over a first channel on a first resource, wherein the first resource occupies one or more time slots in a time domain; the first resource is a sub-band full duplex, SBFD, symbol in a time domain, or the first resource is a non-sub-band full duplex, non-SBFD, symbol in a time domain, or the first resource is an SBFD symbol and a non-SBFD symbol in a time domain.

19. A communications device, characterized by comprising: a communication unit, configured to communicate over a first channel on a first resource, wherein the first resource occupies one or more time slots in a time domain; the first resource is a sub-band full duplex, SBFD, symbol in a time domain, or the first resource is a non-sub-band full duplex, non-SBFD, symbol in a time domain, or the first resource is an SBFD symbol and a non-SBFD symbol in a time domain.

20. A terminal device comprising a processor, a memory, and a computer program or instructions stored on the memory, wherein, The processor executes the computer program or instructions to implement the steps of the method of any one of claims 1-11.

21. A network device comprising a processor, a memory, and a computer program or instructions stored on the memory, wherein, The processor executes the computer program or instructions to implement the steps of the method of any one of claims 12-17.

22. A chip, characterized by The chip comprises a processor and an interface, the processor and the interface are coupled; the processor is used to execute code instructions to execute the method of any one of claims 1 to 11 or claims 12 to 17.

23. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer programs or instructions, which are executed to implement the method of any one of claims 1 to 11 or claims 12 to 17.

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