TCI state determination method and apparatus, information transmission method and apparatus, and communication device

Abstract

The present application belongs to the technical field of communications. Disclosed are a TCI state determination method and apparatus, an information transmission method and apparatus, and a communication device. The TCI state determination method comprises: a terminal receiving first information from a network-side device; and on the basis of the first information, the terminal determining a TCI state for downlink transmission and a TCI state for uplink transmission, wherein the first information comprises at least one of the following: a first indication for indicating a TCI mode; a TCI state candidate set; a second indication for indicating a reference signal type of at least one TCI state; a third indication for indicating a transmission channel or signal applied in the at least one TCI state; a fourth indication for indicating a power offset value of the at least one TCI state for uplink transmission; a fifth indication for indicating QCL information of the at least one TCI state; a sixth indication for indicating an uplink transmission power parameter of the at least one TCI state; and a seventh indication for indicating an SRS resource set for the uplink transmission.

Description

TCI status determination method, information transmission method, device and communication equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202410403676.9 filed on April 3, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application belongs to the field of communication technology, and specifically relates to a TCI status determination method, information transmission method, device and communication equipment. Background Art

[0004] Network-side devices can densely deploy Transmit and Receive Points (TRPs) to improve coverage and throughput. In the future, TRP deployment may be more flexible. For example, TRPs that only receive signals but do not transmit signals (i.e., only uplink transmission) can be deployed, TRPs that only transmit signals but do not receive signals (i.e., only downlink transmission) can be deployed, and TRPs that both receive and transmit signals (i.e., cover both uplink and downlink transmissions) can be deployed. In this scenario of flexible TRP deployment, the terminal cannot determine the state of the Transmission Configuration Indicator (TCI) used for uplink transmission and the state of the TCI used for downlink transmission. Summary of the Invention

[0005] The embodiments of the present application provide a TCI status determination method, device and communication equipment, which can solve the problem that the terminal cannot determine the TCI status for uplink transmission and the TCI status for downlink transmission in the scenario of flexible deployment of TRP.

[0006] In a first aspect, a method for determining a TCI status is provided, which is performed by a terminal. The method includes:

[0007] The terminal receives first information from the network side device;

[0008] Determining, by the terminal, a TCI state for downlink transmission and a TCI state for uplink transmission based on the first information;

[0009] The first information includes at least one of the following:

[0010] A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode;

[0011] A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2;

[0012] A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states;

[0013] a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied;

[0014] a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states;

[0015] a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states;

[0016] a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states;

[0017] The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

[0018] In a second aspect, an information transmission method is provided, which is performed by a network-side device, and the method includes:

[0019] The network side device sends first information to the terminal;

[0020] The first information includes at least one of the following:

[0021] A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode;

[0022] A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2;

[0023] A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states;

[0024] a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied;

[0025] a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states;

[0026] a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states;

[0027] a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states;

[0028] The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

[0029] In a third aspect, a TCI status determination device is provided, the device comprising:

[0030] A first receiving unit, configured to receive first information from a network-side device;

[0031] a first processing unit, configured to determine a TCI state for downlink transmission and a TCI state for uplink transmission based on the first information;

[0032] The first information includes at least one of the following:

[0033] A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode;

[0034] A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2;

[0035] A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states;

[0036] a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied;

[0037] a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states;

[0038] a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states;

[0039] a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states;

[0040] The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

[0041] In a fourth aspect, an information transmission device is provided, the device comprising:

[0042] A first sending unit, configured to send first information to a terminal;

[0043] The first information includes at least one of the following:

[0044] A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode;

[0045] A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2;

[0046] A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states;

[0047] a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied;

[0048] a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states;

[0049] a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states;

[0050] a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states;

[0051] The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

[0052] In a fifth aspect, a terminal is provided, comprising a processor and a memory, wherein the memory stores a program or instruction that can be run on the processor, and when the program or instruction is executed by the processor, the steps of the method described in the first aspect are implemented.

[0053] In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein the communication interface is configured to: receive first information from a network-side device; the processor is configured to: determine a TCI state for downlink transmission and a TCI state for uplink transmission based on the first information;

[0054] The first information includes at least one of the following:

[0055] A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode;

[0056] A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2;

[0057] A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states;

[0058] a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied;

[0059] a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states;

[0060] a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states;

[0061] a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states;

[0062] The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

[0063] In the seventh aspect, a network side device is provided, which includes a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the program or instructions are executed by the processor, the steps of the method described in the second aspect are implemented.

[0064] In an eighth aspect, a network-side device is provided, including a processor and a communication interface, wherein the communication interface is configured to: send first information to a terminal;

[0065] The first information includes at least one of the following:

[0066] A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode;

[0067] A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2;

[0068] A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states;

[0069] a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied;

[0070] a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states;

[0071] a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states;

[0072] a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states;

[0073] The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

[0074] In the ninth aspect, a readable storage medium is provided, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method described in the second aspect are implemented.

[0075] In the tenth aspect, a wireless communication system is provided, comprising: a terminal and a network side device, wherein the terminal can be used to execute the steps of the method described in the first aspect, and the network side device can be used to execute the steps of the method described in the second aspect.

[0076] In the eleventh aspect, a chip is provided, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the method as described in the first aspect, or to implement the method as described in the second aspect.

[0077] In the twelfth aspect, a computer program / program product is provided, which is stored in a storage medium and is executed by at least one processor to implement the steps of the TCI status determination method as described in the first aspect, or to implement the steps of the information transmission method as described in the second aspect.

[0078] In an embodiment of the present application, a terminal receives first information from a network-side device; the terminal determines a TCI state for downlink transmission and a TCI state for uplink transmission based on the first information; wherein the first information includes at least one of the following: a first indication for indicating a TCI mode, the TCI mode including any one of a first mode, a second mode, and a third mode, the first mode being a joint TCI mode, the second mode being an independent TCI mode, and the third mode being a mode other than the joint TCI mode and the independent TCI mode; a TCI state candidate set, the TCI state candidate set including N TCI states, where N is greater than or an integer equal to 2; a second indication for indicating the reference signal type of at least one TCI state among the N TCI states; a third indication for indicating the transmission channel or signal applied by at least one TCI state among the N TCI states; a fourth indication for indicating the power offset value used for uplink transmission by at least one TCI state among the N TCI states; a fifth indication for indicating the QCL information of at least one TCI state among the N TCI states; a sixth indication for indicating the uplink transmission power parameter of at least one TCI state among the N TCI states; a seventh indication for indicating the SRS resource set used for uplink transmission. The terminal determines the TCI state used for uplink transmission and the TCI state used for downlink transmission based on the above-mentioned first information sent by the network-side device. In this way, the terminal can interpret the signaling of uplink and downlink transmission based on the determined uplink and downlink TCI states, thereby ensuring the uplink and downlink transmission performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] FIG1 is a schematic diagram of a network structure applicable to an embodiment of the present application;

[0080] Figure 2 is a schematic diagram of TRP deployment;

[0081] FIG3 is a flow chart of a TCI status determination method provided in an embodiment of the present application;

[0082] FIG4 is a flow chart of an information transmission method provided in an embodiment of the present application;

[0083] FIG5 is a structural diagram of a TCI status determination device provided in an embodiment of the present application;

[0084] FIG6 is a structural diagram of an information transmission device provided in an embodiment of the present application;

[0085] FIG7 is a structural diagram of a communication device provided in an embodiment of the present application;

[0086] FIG8 is a structural diagram of a terminal provided in an embodiment of the present application;

[0087] FIG9 is a structural diagram of a network-side device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0088] The following will be combined with the accompanying drawings in the embodiments of this application to clearly describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this application.

[0089] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same type, and do not limit the number of objects, for example, the first object can be one or more. In addition, "or" in this application represents at least one of the connected objects. For example, "A or B" covers three options, namely, Option 1: including A but not including B; Option 2: including B but not including A; Option 3: including both A and B. The character " / " generally indicates that the objects associated before and after are in an "or" relationship.

[0090] The term "indication" in this application can be either a direct indication (or explicit indication) or an indirect indication (or implicit indication). A direct indication can be understood as the sender explicitly informing the receiver of specific information, the operation to be performed, or the requested result, etc. in the instruction sent; an indirect indication can be understood as the receiver determining the corresponding information based on the instruction sent by the sender, or making a judgment and determining the operation to be performed or the requested result, etc. based on the judgment result.

[0091] It is worth noting that the technology described in the embodiments of the present application is not limited to the Long Term Evolution (LTE) / LTE-Advanced (LTE-A) system, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the technology described can be used for the systems and radio technologies mentioned above, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for illustrative purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th generation (6G) systems. th Generation, 6G) communication system.

[0092] FIG1 is a block diagram of a wireless communication system applicable to an embodiment of the present application. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), a notebook computer, a personal digital assistant (PDA), a handheld computer, a netbook, an ultra-mobile personal computer (UMPC), a mobile internet device (MID), an augmented reality (AR), a virtual reality (VR) device, a robot, a wearable device (Wearable Device), an aircraft (Flight Vehicle), a vehicle-mounted device (VUE), a ship-mounted device, a pedestrian user equipment (PUE), a smart home (home appliances with wireless communication capabilities, such as refrigerators, televisions, washing machines, or furniture), a game console, a personal computer (PC), an ATM, or a self-service machine, or other terminal-side devices. Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. Among them, the vehicle-mounted device can also be called a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network side device 12 may include an access network device or a core network device, wherein the access network device may also be called a radio access network (Radio Access Network, RAN) device, a radio access network function or a radio access network unit. The access network device may include a base station, a wireless local area network (Wireless Local Area Network, WLAN) access point (Access Point, AP) or a wireless fidelity (Wireless Fidelity, WiFi) node, etc.Among them, the base station can be referred to as Node B (NB), Evolved Node B (eNB), the next generation Node B (gNB), New Radio Node B (NR Node B), access point, Relay Base Station (RBS), Serving Base Station (SBS), Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), Home Node B (HNB), Home evolved Node B (home evolved Node B), Transmission Reception Point (TRP) or other appropriate terms in the relevant field. As long as the same technical effect is achieved, the base station is not limited to specific technical vocabulary. It should be noted that in the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited.

[0093] Before describing the embodiments of the present application, the following briefly introduces the relevant technologies:

[0094] 1. TRP for uplink transmission only

[0095] The network can densely deploy Transmitting and Receiving Points (TRPs) to improve coverage and throughput. To reduce TRP deployment costs, ease deployment difficulty, and improve uplink coverage, some deployed TRPs can receive signals without transmitting them, i.e., perform uplink (UL) transmission only (UL-only), as shown in Figure 2. From a network energy-saving perspective, allowing TRPs to shut down downlink transmission links also offers certain benefits. In scenarios with dense uplink traffic, uplink transmission no longer relies on downlink reference signal measurement and assistance, which can also save reference signal overhead to a certain extent.

[0096] 2. Multi-TRP (MTRP)

[0097] The 5th Generation Mobile Communication Technology (5G) system, corresponding to the 3rd Generation Partnership Project (3GPP), introduced the MTRP scenario, where multiple Transmission Relay Protocols (TRPs) collaborate to send data to the same User Equipment (UE). This scenario has been continuously enhanced through Rel-16 / 17 / 18. Except for Coherent Joint Transmission (CJT) transmission, which supports up to four TRP collaborations, other transmission schemes support up to two TRP collaborations. Because the backhaul between TRPs is divided into ideal (near real-time information exchange) and non-ideal (information exchange with a large delay), the multi-TRP transmission schemes implemented are also different.

[0098] In non-ideal backhaul scenarios, the achievable transmission solution is the MTRP solution that schedules multiple downlink control information (DCI), including:

[0099] The network configures different coreset pool indices (coresetPoolIndex) for different control resource sets (CORESETs). DCIs associated with different coresetPoolIndex independently schedule their own physical downlink shared channels (PDSCHs), which can have full, partial, or no overlap in time and frequency resources.

[0100] The network configures different coresetPoolIndex for different CORESETs. DCIs associated with different coresetPoolIndex independently schedule their own physical uplink shared channels (PUSCHs). The time-frequency resources can be fully overlapped, partially overlapped, or non-overlapped. When PUSCHs fully or partially overlap, the UE has the capability of multi-panel simultaneous transmission.

[0101] In an ideal backhaul scenario, in addition to the aforementioned MTRP scheme for multiple DCI schedules, other achievable transmission schemes include:

[0102] Two TRPs repeatedly send the Physical Downlink Control Channel (PDCCH);

[0103] Two TRPs send PDCCH in a single frequency network (SFN) mode;

[0104] A single DCI-scheduled PDSCH is sent by two TRPs using space division multiplexing (SDM), frequency division multiplexing (FDM), time division multiplexing (TDM) repetition, and SFN.

[0105] The UE sends repetitions of the Physical Uplink Control Channel (PUCCH) to two TRPs respectively, or a UE with Simultaneous Transmission with Multiple Panels (STxMP) capability sends PUCCH simultaneously in SFN mode;

[0106] A UE with a single DCI scheduling or configured grant (CG) sends PUSCH repetitions to two TRPs respectively, or sends PUSCH simultaneously in SDM or SFN mode.

[0107] NR Beam Indication Mechanism

[0108] After beam measurement and reporting, the network can provide beam indications for downlink and uplink channels or reference signals, which are used to establish a beam link between the network and the UE and enable channel or reference signal transmission. For the UE, beam information refers to the receive spatial domain filter used by the UE to receive downlink channels / signals and the transmit spatial domain filter used by the UE to transmit uplink channels / signals.

[0109] 1. Unified Transmission Configuration Indicator (TCI) framework for Release 17 (Rel-17, R17)

[0110] Rel-17 introduced a unified TCI framework (UTCI), which means that a common beam indicated by the network using the Medium Access Control (MAC) Control Element (CE) or DCI can be used for multiple channel transmissions. In NR, the beam information is determined by the Quasi-Colocated (QCL) Type-D of the TCI state. The TCI also includes the source reference signal (source RS), so the UE can use the receive / transmit spatial domain filter used to receive or transmit the source reference signal to receive or transmit other channels / signals that have a quasi-colocated relationship with the source reference signal.

[0111] Specifically, the source RSs of TCI status under the unified TCI framework include:

[0112] Downlink: Synchronization Signal Block (SSB), Channel State Information Reference Signal (CSI-RS) for beam training, Tracking RS (TRS);

[0113] Uplink: SSB, CSI-RS for beam management, tracking CSI-RS, and Sounding Reference Signal (SRS) for beam management.

[0114] Depending on whether the uplink and downlink beams are the same, the network can be configured in the following two modes:

[0115] Joint TCI mode: The network indicates a joint TCI state for the target downlink channel / signal and the target uplink channel / signal, that is, the target downlink channel / signal and the target uplink channel / signal use the same TCI state.

[0116] Separate TCI mode: The network indicates two TCI states, namely the downlink (DL) TCI state and the UL TCI state, which are used for the target downlink channel / signal and the target uplink channel / signal respectively. That is, the target uplink channel / signal and the target downlink channel / signal use different TCI states.

[0117] The network configures the TCI state pool through RRC signaling and configures and activates the TCI state corresponding to at least one codepoint through MAC CE. Each codepoint corresponds to a {joint TCI state}, or the full set or subset of {DL TCI state, UL TCI state}, namely:

[0118] In Joint TCI mode, each codepoint corresponds to a joint TCI state;

[0119] In Separate TCI mode, each codepoint can correspond to the full set or a subset of {DL TCI state, UL TCI state};

[0120] In independent TCI mode, when the TCI code point indicated by the DCI corresponds to a subset of {DL TCI state, UL TCI state}, only the indicated TCI state is updated, while the other TCI state remains unchanged.

[0121] When the TCI state pool configured by RRC contains only one joint TCI state or a pair of {DL TCI state, UL TCI state}, the TCI state is directly applied to the target channel / signal; when the MAC CE activates a codepoint, the TCI state corresponding to the codepoint is directly applied to the target channel / signal. When the MAC CE activates multiple codepoints, the network uses the TCI field in DCI format 1_1 / 1_2 to indicate one of the codepoints, and the TCI state corresponding to the codepoint is applied to the target channel / signal. To ensure the reliability of updated TCI indications, the network and UE jointly determine the effective time (Beam Application Time, BAT) of the latest indicated TCI state based on ACK feedback: When the TCI state indicated by the DCI is different from the original TCI state, the latest indicated TCI state is used starting from the first time slot after Y symbols of the last ACK symbol corresponding to the DCI.

[0122] The unified TCI framework also links power control parameters to TCI states. The pathloss reference signal (PLRS) is configured within or associated with a TCI state (joint TCI state or UL TCI state). Other power control parameters (such as P0, alpha, and close loop index) are configured and associated with TCI states based on the uplink channel / signal. This means that each PUCCH, PUSCH, and SRS has its own power control parameters associated with the TCI state or included in the configuration information for each channel / signal.

[0123] Considering that different channels / signals or different types of the same channel / signal may use different TCI states, the uplink channel / signal and downlink channel / signal (target channel / signal) using the UTCI state are determined:

[0124] Downlink: UE-specific PDSCH, UE-specific CORESET, aperiodic CSI-RS for channel information / beam management (optional), non-UE-specific CORESET and associated PDSCH (optional), etc.

[0125] Uplink: Dynamic grant (DG) / CG PUSCH, PUCCH, periodic / semi-persistent / aperiodic SRS (configurable);

[0126] For channels / signals other than the target channel / signal, the TCI state or spatial relation used is still determined according to the configuration indication method of Rel-15 / 16.

[0127] 2. Unified TCI framework extension for Release 18 (Rel-18, R18)

[0128] Rel-18 further expands the unified TCI framework for MTRP scenarios. The basic configuration and indication principles are consistent with the single TRP defined in Rel-17. In order to implement various MTRP transmission schemes, two TCI states need to be indicated. Therefore:

[0129] In Joint TCI mode, each codepoint corresponds to the full set or subset of {joint TCI state 1, joint TCI state 2} and indicates which TCI state each TCI state corresponds to;

[0130] In Separate TCI mode, each codepoint can correspond to the full set or a subset of {DL TCI state 1, UL TCI state 1, DL TCI state 2, UL TCI state 2} and indicate which TCI state each codepoint corresponds to;

[0131] In both modes, when the TCI code point indicated by the DCI corresponds to a subset, only the TCI status of the indicated subset is updated, while the status of other TCIs remains unchanged;

[0132] In the case of a TCI state indicating two TRPs, the TCI states used by each target channel / signal are decoupled from each other, that is, each target channel / signal independently uses the two indicated joint TCI states, or either or both of the two DL / UL TCI states;

[0133] The TCI selection field in the downlink DCI indicates that various MTRP transmission schemes for PDSCH scheduled by a single DCI use two joint TCI states, or either or both of the two DL TCI states; the SRS resource set indicator field in the uplink DCI indicates that various MTRP transmission schemes for PUSCH scheduled by a single DCI use two joint TCI states, or either or both of the two UL TCI states.

[0134] The RRC parameters configure each CORESET, aperiodic CSI-RS resource / CSI-RS resource set to use two joint TCI states, or either or both of the two DL TCI states; the RRC parameters configure each PUCCH resource / PUCCH resource group, SRS resource to use two joint TCI states, or either or both of the two UL TCI states.

[0135] In the UL-only TRP scenario, the DL single TRP (Signal TRP, STRP) transmission and UL MTRP transmission modes are introduced. In this mode, the joint TCI state mode can be supported. Rel-18 extends the unified TCI framework to the MTRP scenario, and only supports two TRPs in joint TCI mode or independent TCI mode, and does not support the mixed TCI mode. When two TCI states are indicated, it is considered that there are two TCI states for selection for both downlink and uplink transmissions. The target downlink and uplink channels / signals are indicated by some default rules, RRC configurations or DCI to use one or both of the two TCI states. In the future, TRP deployment may be more flexible. For example, UL-only TRP, DL-only (i.e., only sending signals but not receiving signals) TRP, and UL-DL both (i.e., both receiving and sending signals) TRP can be deployed. In this scenario of flexible TRP deployment, the terminal cannot determine the TCI state used for uplink transmission and the TCI state used for downlink transmission. For example, if the network indicates two joint TCI states to the UE in the Rel-18 joint TCI state mode, the QCL information configured for each TCI state can only be a DL RS. However, for the UL-only TRP, no downlink reference signal is sent. Therefore, the R18 joint TCI state mode is no longer applicable. In addition, for the joint TCI state mode and separate TCI state mode, the UL-only TRP has no DL transmission. However, the R18 architecture only supports indicating two TCI states for downlink. In the R18 architecture, the DL TCI state corresponding to the UL-only TRP cannot be used for transmission. The protocol is designed to provide signaling redundancy to select one TCI state or both TCI states for DL ​​transmission.

[0136] It can be seen that in the scenario of flexible deployment of TRP, the terminal cannot determine the number of TCI states used for uplink transmission and the number of TCI states used for downlink transmission.

[0137] In view of this, an embodiment of the present application provides a TCI state determination method, an information transmission method, a TCI state determination device, an information transmission device and a communication device to solve the problem in the related art that the terminal cannot determine the number of TCI states used for uplink transmission and the number of TCI states used for downlink transmission.

[0138] The TCI status determination method and information transmission method provided in the embodiments of the present application are described in detail below with reference to some embodiments and their application scenarios in conjunction with the accompanying drawings.

[0139] FIG3 shows a flow chart of a TCI status determination method provided by an embodiment of the present application. As shown in FIG3 , the TCI status determination method includes the following steps:

[0140] Step 301: The terminal receives first information from a network-side device;

[0141] Step 302: The terminal determines a TCI state for downlink transmission and a TCI state for uplink transmission based on the first information;

[0142] The first information includes at least one of the following:

[0143] A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode;

[0144] A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2;

[0145] A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states;

[0146] a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied;

[0147] a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states;

[0148] a fifth indication, used to indicate QCL information of at least one TCI state among the N TCI states;

[0149] a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states;

[0150] The seventh indication is used to indicate an SRS resource set used for uplink transmission.

[0151] Among them, downlink transmission may include one or more of a physical downlink shared channel (PDSCH), PDCCH and CSI-RS, and uplink transmission may include one or more of a physical uplink shared channel (PUSCH), PUCCH and SRS.

[0152] The TCI state candidate set includes N TCI states, some of which can be used for uplink transmission, some of which can be used for downlink transmission, or some of which can be used for both uplink and downlink, while some of which can be used only for uplink or only for downlink.

[0153] The above-mentioned first indication can assist the terminal in determining the TCI state for uplink transmission and the TCI state for downlink transmission by indicating the TCI mode. The above-mentioned third mode may include a mixed mode (or other modes). The mixed mode can be understood as different TRPs adopting different TCI modes. Taking two TRPs as an example, one TRP adopts the first mode and the other TRP adopts the second mode. The TRP here can be understood as a TCI state candidate set, or coresetpoolindex.

[0154] The second indication can assist the terminal in determining the TCI state for uplink transmission and the TCI state for downlink transmission by indicating the reference signal type of the TCI state. Exemplarily, the second indication is used to indicate that a certain TCI state uses SRS or physical random access channel (PRACH) resources as beam indication information. The beam indication information here can be understood as type D QCL information or spatial filter information.

[0155] The above-mentioned third indication can assist the terminal in determining the TCI state for uplink transmission and the TCI state for downlink transmission by indicating the transmission channel or signal applied to the TCI state. Exemplarily, the third indication is used to indicate that a certain TCI state is used for UL-only (indicating that the TCI state can only be used for uplink transmission), or for DL-only (indicating that the TCI state can only be used for downlink transmission), or for UL-DL both (indicating that the TCI state is used for both uplink and downlink transmission). Exemplarily, the third indication is used to indicate the SRS resource set ID (SRS resource set ID) of a certain TCI state.

[0156] The fourth indication, by indicating the power offset value for uplink transmission in the TCI state, can assist the terminal in determining the TCI state for uplink transmission and the TCI state for downlink transmission. Exemplarily, the fourth indication indicates a candidate set of power offset values, which may include one or more power offset values ​​for uplink transmission in the TCI state. For another example, if the power offset value is configured within a TCI state, it indicates that the TCI state can be used for uplink transmission.

[0157] The QCL information indicated by the fifth indication may include, for example, SSB or CSI-RS.

[0158] In an embodiment of the present application, a terminal receives first information from a network-side device; the terminal determines a TCI state for downlink transmission and a TCI state for uplink transmission based on the first information; wherein the first information includes at least one of the following: a first indication for indicating a TCI mode, the TCI mode including any one of a first mode, a second mode, and a third mode, the first mode being a joint TCI mode, the second mode being an independent TCI mode, and the third mode being a mode other than the joint TCI mode and the independent TCI mode; a TCI state candidate set, the TCI state candidate set including N TCI states, where N is greater than or an integer equal to 2; a second indication for indicating the reference signal type of at least one TCI state among the N TCI states; a third indication for indicating the transmission channel or signal to which at least one TCI state among the N TCI states is applied; a fourth indication for indicating the power offset value used for uplink transmission by at least one TCI state among the N TCI states; a fifth indication for indicating the QCL information of at least one TCI state among the N TCI states; a sixth indication for indicating the uplink transmission power parameter of at least one TCI state among the N TCI states; and a seventh indication for indicating the SRS resource set used for uplink transmission. In this way, the terminal can determine the TCI state used for uplink transmission and the TCI state used for downlink transmission based on the above-mentioned first information sent by the network-side device. In this way, the terminal can interpret the signaling for uplink and downlink transmission based on the determined uplink and downlink TCI states, which can not only ensure the uplink and downlink transmission performance, but also optimize the signaling design and reduce signaling redundancy.

[0159] In some embodiments, the terminal determines, based on the first information, a TCI state for downlink transmission and a TCI state for uplink transmission, including:

[0160] The terminal determines, based on the first information, the number of TCI states used for downlink transmission and the number of TCI states used for uplink transmission.

[0161] In this scenario of flexible TRP deployment, the number of TCI states used for uplink transmission and the number of TCI states used for downlink transmission also vary. The number of TCI states used for uplink transmission and the number of TCI states used for downlink transmission can be the same or different.

[0162] Therefore, in this embodiment, the terminal can first determine the number of TCI states used for uplink transmission and the number of TCI states used for downlink transmission. In this way, the terminal can interpret uplink and downlink transmission signaling based on the determined number of uplink and downlink TCI states, which not only ensures uplink and downlink transmission performance but also optimizes signaling design and reduces signaling redundancy.

[0163] In some embodiments, the number of TCI states used for downlink transmission is different from the number of TCI states used for uplink transmission.

[0164] In some embodiments, the number of TCI states used for downlink transmission is less than the number of TCI states used for downlink transmission; or,

[0165] The number of the TCI states used for downlink transmission is greater than the number of the TCI states used for uplink transmission.

[0166] For ease of understanding, the present application embodiment takes two TRPs cooperating with the same UE as an example to illustrate the subsequent implementation methods. Two TRPs cooperating with the same UE may include the following situations:

[0167] Case 1: Both TRPs are used for UL-DL both, then the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2;

[0168] Case 2: One of the two TRPs is used for UL-only and the other is used for UL-DL both. The number of TCI states used for downlink transmission is 1, and the number of TCI states used for uplink transmission is 2.

[0169] Case 3: One of the two TRPs is used for DL-only and the other TRP is used for UL-DL both. The number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 1.

[0170] It should be noted that the number of TCI states described above does not represent the total number of TCI states. This is because the TCI mode may be a joint TCI mode, an independent TCI mode, a hybrid mode, or another mode. Taking Case 1 as an example, although the number of TCI states for downlink transmission and the number of TCI states for uplink transmission are both 2, if the TCI mode is a joint TCI mode, the number of TCI states can be 2 instead of 4. If the TCI mode is an independent TCI mode, the number of TCI states can be 4. In the case of introducing a hybrid mode, if the TCI mode is a hybrid mode, the number of TCI states can be 3.

[0171] In some embodiments, the terminal determines, based on the first information, the number of TCI states for downlink transmission and the number of TCI states for uplink transmission, including at least one of the following:

[0172] When the first condition is met, the terminal determines that the number of TCI states for downlink transmission is 1;

[0173] When the second condition is met, the terminal determines that the number of TCI states for uplink transmission is 1;

[0174] If the third condition is met, the terminal determines that the number of TCI states for downlink transmission is 2;

[0175] The first condition includes at least one of the following:

[0176] At least one TCI state among the N TCI states is configured with a power offset value;

[0177] Indication information for selecting the TCI state when the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH is not configured;

[0178] The second mode is configured, and the terminal receives a media access control MAC element CE with a TCI state activated, and all code points of the MAC CE indicate a downlink TCI state;

[0179] The first mode is configured, and the terminal receives a MAC CE in which a TCI state is activated, and all code points of the MAC CE indicate a QCL information;

[0180] The first mode is configured, and the terminal receives a MAC CE that activates a TCI state, and the TCI state indicated by at least one codepoint of the MAC CE is associated with a power offset value;

[0181] The second condition includes:

[0182] An SRS resource set for uplink transmission is configured;

[0183] The third condition includes:

[0184] The terminal receives a MAC CE that activates a TCI state, where at least one code point of the MAC CE indicates two TCI states, or at least one code point of the MAC CE indicates two QCL information.

[0185] In some embodiments, the terminal determines, based on the first information, a TCI state for downlink transmission and a TCI state for uplink transmission, further comprising:

[0186] The terminal determines information included in a target TCI state based on the first information, the number of TCI states used for downlink transmission, and the number of TCI states used for uplink transmission.

[0187] Through the aforementioned implementation method, the terminal determines the number of TCI states for downlink transmission and the number of TCI states for uplink transmission. On this basis, the terminal also needs to determine what information the target TCI state contains. Here, the target TCI state can be understood as the TCI state that the terminal needs to use, or in other words, the target TCI state is the TCI state for uplink and downlink determined by the terminal. It should be noted that the TCI state indicated in the first information sent by the network side device is selected from the TCI state candidate set. The number of TCI states in the TCI state candidate set is generally not equal to the number of TCI states for uplink and downlink finally determined by the terminal, that is, the number of target TCI states is generally not equal to the number of TCI states in the TCI state candidate set.

[0188] In this implementation, the terminal may determine the information included in the target TCI state based on the first information, the number of TCI states used for downlink transmission, and the number of TCI states used for uplink transmission. The following describes the relevant implementations for different TCI modes and different numbers of TCI states.

[0189] The following first describes the first mode or the third mode.

[0190] In some embodiments, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the target TCI state includes a first TCI state and a second TCI state, and the second TCI state is a TCI state used only for uplink transmission;

[0191] The information contained in the first TCI status includes at least one of the following:

[0192] First QCL information, where the reference signal corresponding to the first QCL information includes a synchronization signal block SSB or a CSI reference signal CSI-RS;

[0193] First uplink power parameter;

[0194] The information included in the second TCI status includes at least one of the following:

[0195] second QCL information, where a reference signal corresponding to the second QCL information includes an SRS;

[0196] Reference signal indication information, where the reference signal indication information is used to indicate an SRS;

[0197] Second uplink power parameter.

[0198] The transmission mode corresponding to this implementation is {DL 1TCI ​​state, UL 2TCI state}.

[0199] It should be noted that in this embodiment, when the TCI mode is the first mode, the number of target TCI states is two, namely the first TCI state and the second TCI state. When the TCI mode is the third mode, the number of target TCI states can be three. In other words, in addition to the first and second TCI states, the target TCI states can also include other TCI states. Subsequent identical or similar descriptions are understood the same way and are not repeated here.

[0200] In some embodiments, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 1, the target TCI state includes a third TCI state and a fourth TCI state, and the fourth TCI state is a TCI state used only for downlink transmission;

[0201] The third TCI status includes at least one of the following:

[0202] third QCL information, where a reference signal corresponding to the third QCL information includes an SSB or a CSI-RS;

[0203] The third uplink power parameter;

[0204] The fourth TCI state includes at least one of the following:

[0205] The fourth QCL information, where the reference signal corresponding to the fourth QCL information includes SSB or CSI-RS.

[0206] The transmission mode corresponding to this implementation is {DL 2TCI state, UL 1TCI ​​state}.

[0207] In some embodiments, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the target TCI state includes a fifth TCI state and a sixth TCI state;

[0208] The fifth TCI state includes at least one of the following:

[0209] fifth QCL information, where a reference signal corresponding to the fifth QCL information includes an SSB or a CSI-RS;

[0210] Fourth uplink power parameter;

[0211] an eighth indication, used to indicate a transmission channel or signal applied to the fifth TCI state;

[0212] or,

[0213] The sixth TCI state includes at least one of the following:

[0214] Sixth QCL information, where a reference signal corresponding to the sixth QCL information includes an SSB or a CSI-RS;

[0215] Fifth uplink power parameter;

[0216] The ninth indication is used to indicate the transmission channel or signal applied to the sixth TCI state.

[0217] The transmission mode corresponding to this implementation is {DL 2TCI state, UL 2TCI state}.

[0218] Through the above multiple implementations, the terminal can determine, in the first mode or the third mode, the information contained in each TCI state within the target TCI state for different numbers of TCI states. Based on this, the terminal also needs to further determine which TCI state(s) within the target TCI state(s) are used for downlink transmission and which TCI state(s) are used for uplink transmission. The following describes these implementations.

[0219] In some embodiments, the method further comprises:

[0220] The terminal determines, according to information included in the target TCI state, a first target TCI state and a second target TCI state, where the first target TCI state is a TCI state for downlink transmission and the second target TCI state is a TCI state for uplink transmission;

[0221] The first target TCI status includes at least one of the following:

[0222] The first TCI state among the default multiple TCI states;

[0223] TCI status without associated power offset value;

[0224] TCI status configured with QCL information;

[0225] The reference signal corresponding to the configured QCL information is the TCI state of the downlink reference signal;

[0226] or,

[0227] The second target TCI state includes at least one of the following:

[0228] TCI status without QCL information configured;

[0229] The reference signal corresponding to the configured QCL information is the TCI state of the SRS;

[0230] TCI status with uplink power parameters configured.

[0231] The second mode will be described below.

[0232] In some embodiments, when the TCI mode is the second mode, the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the target TCI state includes a seventh TCI state, an eighth TCI state, and a ninth TCI state, the seventh TCI state is a TCI state for downlink transmission, and the eighth TCI state and the ninth TCI state are TCI states for uplink transmission;

[0233] wherein at most one of the eighth TCI state and the ninth TCI state is configured with a power offset value;

[0234] or,

[0235] At least one of the eighth TCI state and the ninth TCI state is associated with the same physical cell identifier (PCI) as the seventh TCI state.

[0236] The transmission mode corresponding to this implementation is {DL 1TCI ​​state, UL 2TCI state}.

[0237] In some embodiments, when the TCI mode is the second mode, the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the target TCI state includes four TCI states;

[0238] In the case where at least one TCI state of the four TCI states is associated with an additional PCI, the additional PCI associated with the at least one TCI state is the same PCI, and the additional PCI is the PCI of the neighboring cell.

[0239] The transmission mode corresponding to this implementation is {DL 2TCI state, UL 2TCI state}.

[0240] This implementation can be applied to the following scenarios: When the UE is at the cell edge, the UE can be allowed to transmit data with the TRP of the serving cell and the TRP of the neighboring cell, thereby improving the uplink and downlink data transmission performance. At this time, the UE receives the TCI status indication of the network-side device, and can allow some TCI states to be associated with additional PCIs (i.e., neighboring cells). In this scenario, limiting the additional PCI associated with at least one TCI state to the same PCI can ensure that the UE only communicates with the current cell and one neighboring cell, which can ensure the communication performance of the UE.

[0241] The embodiment of the present application further provides a solution for updating the power control parameters of the TCI state, and the relevant implementation methods are described below.

[0242] In some embodiments, the method further comprises:

[0243] The terminal receives second information from the network-side device, where the second information is used to update a power control parameter of at least one TCI state in the target TCI state;

[0244] The second information includes at least one of the following:

[0245] Power offset value (PL offset);

[0246] TCI state ID (TCI state ID).

[0247] The second information may be a MAC CE for activating the TCI state or a newly defined MAC CE. In addition to including at least one of the power offset value and the TCI state identifier, the second information may also include a PLRS ID.

[0248] In some embodiments, the method further comprises:

[0249] The terminal receives third information from the network-side device, where the third information is used to indicate a target code point of the second information, where the second information is a MAC CE;

[0250] When the QCL information of the TCI state indicated by the target code point is the same as the QCL information of the at least one TCI state, the terminal updates the power control parameter of the at least one TCI state to the power control parameter associated with the TCI state indicated by the target code point.

[0251] In some embodiments, the third information is DCI;

[0252] The effective time for updating the power control parameter of the at least one TCI state includes any one of the following:

[0253] a first symbol of downlink transmission or uplink transmission scheduled by the third information;

[0254] X orthogonal frequency division multiplex (OFDM) symbols following the third information, where X is an integer greater than or equal to 1.

[0255] In this implementation, the terminal may determine the effective time of the power control parameter update according to the DCI.

[0256] Exemplarily, the terminal may determine the effective time of the power control parameter update according to the PDSCH or PUSCH scheduled by the third information.

[0257] Optionally, the third information includes any one of DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, and DCI format 0_2.

[0258] It should be noted that the scheme for updating the power control parameters in the TCI state can be independent of the aforementioned implementation of the embodiment of the present application. In other words, the scheme for updating the power control parameters in the TCI state is not only applicable to the scenario of flexible TRP deployment, but also to the TRP deployment scenario in related technologies.

[0259] The above is an embodiment of the method on the terminal side. The following describes an embodiment of the method on the network side device.

[0260] FIG4 shows a flow chart of an information transmission method provided by an embodiment of the present application. As shown in FIG4 , the information transmission method includes the following steps:

[0261] Step 401: The network side device sends first information to the terminal;

[0262] The first information includes at least one of the following:

[0263] A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode;

[0264] A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2;

[0265] A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states;

[0266] a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied;

[0267] a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states;

[0268] a fifth indication, used to indicate QCL information of at least one TCI state among the N TCI states;

[0269] a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states;

[0270] The seventh indication is used to indicate an SRS resource set used for uplink transmission.

[0271] Optionally, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the N TCI states include a first TCI state and a second TCI state, and the second TCI state is a TCI state used only for uplink transmission;

[0272] The information contained in the first TCI status includes at least one of the following:

[0273] First QCL information, where the reference signal corresponding to the first QCL information includes a synchronization signal block SSB or a CSI reference signal CSI-RS;

[0274] First uplink power parameter;

[0275] The information included in the second TCI status includes at least one of the following:

[0276] second QCL information, where a reference signal corresponding to the second QCL information includes an SRS;

[0277] Reference signal indication information, where the reference signal indication information is used to indicate an SRS;

[0278] Second uplink power parameter.

[0279] Optionally, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 1, the N TCI states include a third TCI state and a fourth TCI state, and the fourth TCI state is a TCI state used only for downlink transmission;

[0280] The third TCI state includes at least one of the following:

[0281] third QCL information, where a reference signal corresponding to the third QCL information includes an SSB or a CSI-RS;

[0282] The third uplink power parameter;

[0283] The fourth TCI state includes at least one of the following:

[0284] The fourth QCL information, where the reference signal corresponding to the fourth QCL information includes SSB or CSI-RS.

[0285] Optionally, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the N TCI states include a fifth TCI state and a sixth TCI state;

[0286] The fifth TCI state includes at least one of the following:

[0287] fifth QCL information, where a reference signal corresponding to the fifth QCL information includes an SSB or a CSI-RS;

[0288] Fourth uplink power parameter;

[0289] an eighth indication, used to indicate a transmission channel or signal applied to the fifth TCI state;

[0290] or,

[0291] The sixth TCI state includes at least one of the following:

[0292] Sixth QCL information, where a reference signal corresponding to the sixth QCL information includes an SSB or a CSI-RS;

[0293] Fifth uplink power parameter;

[0294] The ninth indication is used to indicate the transmission channel or signal applied to the sixth TCI state.

[0295] Optionally, when the TCI mode is the second mode, the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the N TCI states include a seventh TCI state, an eighth TCI state, and a ninth TCI state, the seventh TCI state is a TCI state for downlink transmission, and the eighth TCI state and the ninth TCI state are TCI states for uplink transmission;

[0296] wherein at most one of the eighth TCI state and the ninth TCI state is configured with a power offset value;

[0297] or,

[0298] At least one of the eighth TCI state and the ninth TCI state is associated with the same physical cell identifier (PCI) as the seventh TCI state.

[0299] Optionally, when the TCI mode is the second mode, the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the N TCI states include four TCI states;

[0300] In the case where at least one TCI state of the four TCI states is associated with an additional PCI, the additional PCI associated with the at least one TCI state is the same PCI, and the additional PCI is the PCI of the neighboring cell.

[0301] Optionally, the method further includes:

[0302] The network side device sends second information to the terminal, where the second information is used to update a power control parameter of at least one TCI state among the N TCI states;

[0303] The second information includes at least one of the following:

[0304] Power offset value;

[0305] TCI status indicator.

[0306] Optionally, the method further includes:

[0307] The network-side device sends third information to the terminal, where the third information is used to indicate a target code point of the second information, where the second information is a MAC CE;

[0308] When the QCL information of the TCI state indicated by the target code point is the same as the QCL information of the at least one TCI state, the power control parameter of the at least one TCI state needs to be updated to the power control parameter associated with the TCI state indicated by the target code point.

[0309] Optionally, the third information is downlink control information DCI;

[0310] The effective time for updating the power control parameter of the at least one TCI state includes any one of the following:

[0311] a first symbol of downlink transmission or uplink transmission scheduled by the third information;

[0312] X orthogonal frequency division multiplexing (OFDM) symbols following the third information, where X is an integer greater than or equal to 1.

[0313] Optionally, the third information includes any one of DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, and DCI format 0_2.

[0314] For the relevant description of the embodiments of the present application, please refer to the relevant description of the method embodiment of Figure 3, and the same technical effects can be achieved. To avoid repetition, they will not be described in detail.

[0315] In order to better understand the embodiments of the present application, specific examples are provided below to illustrate the solutions of the embodiments of the present application.

[0316] Example 1: Method for determining the number of TCI states indicated for uplink and downlink transmission

[0317] Step 1. The UE receives the configuration of the network side device (i.e., first information). The configuration includes at least one of the following information:

[0318] 1.1.1.TCI status indication mode: Joint TCI mode, separate mode, or first mode

[0319] 1.1.2. A TCI state candidate set includes at least one TCI state configuration, each of which includes at least one of the following information:

[0320] 1.1.2.1. QoS Class Identifier (QCL) Information (e.g., SSB, CSI-RS)

[0321] 1.1.2.2. Reference Signal Information (e.g., Introducing SRS or PRACH Resources as Beam Indication Information)

[0322] 1.1.2.3.UL Transmit Power Parameter Information

[0323] 1.1.2.4. Application transmission channel or signal:

[0324] 1.1.2.4.1.Eg1: Indicates UL-only, DL-only or UL-DL both

[0325] 1.1.2.4.2.Eg2: indicates SRS resource set ID

[0326] 1.1.3. Information about the SRS resource set used for uplink transmission;

[0327] 1.1.4. Candidate set of power offset values ​​for uplink transmission.

[0328] Step 2. The UE determines the number of uplink and downlink TCI states according to the configuration information.

[0329] 1.2.1. The number of TCI states indicated by uplink and downlink transmissions, including one of the following:

[0330] 1.2.1.1.{DL 1TCI ​​state, UL 2TCI state}: indicates one TCI state in the downlink and two TCI states in the uplink;

[0331] 1.2.1.1.1. When at least one of the following conditions is met, it is determined that the DL indicates a TCI state:

[0332] 1.2.1.1.1.1. There is a TCI state in the TCI state candidate set that is configured with PL offset;

[0333] 1.2.1.1.1.2. The TCI state selection indication field of the PDCCH and / or PDSCH is not configured;

[0334] 1.2.1.1.1.3. When separate TCI indication mode is configured and the UE receives a MAC CE with TCI state activated, all codepoints of the MAC CE indicate a DL TCI state;

[0335] 1.2.1.1.1.4. Joint TCI state mode is configured. The UE receives a MAC CE with TCI state activated, and all codepoints of the MAC CE indicate a QCL.

[0336] 1.2.1.1.1.5. Joint TCI state indication mode is configured, and the UE receives a MAC CE indicating TCI state activation, where the MAC CE has at least one codepoint indicating a TCI state associated with a PL offset;

[0337] 1.2.1.1.2. When at least one of the following conditions is met, it is determined that the UL indicates 2 TCI states;

[0338] 1.2.1.1.3. When two SRS resource sets for uplink transmission are configured;

[0339] 1.2.1.2.{DL 2TCI states, UL 1TCI ​​state}: Indicates two TCI states in the downlink and one TCI state in the uplink.

[0340] 1.2.1.2.1. When at least one of the following conditions is met, it is determined that the UL indicates a TCI state;

[0341] 1.2.1.2.1.1. When one SRS resource set is configured for uplink transmission

[0342] 1.2.1.2.2. When at least one of the following conditions is met, it is determined that the DL indicates 2 TCI states;

[0343] 1.2.1.2.3. The UE receives a MAC CE for activating a TCI state, where the MAC CE indicates that at least one codepoint includes two TCI states.

[0344] Example 2: Method for determining TCI state for uplink and downlink transmission in Joint TCI state mode

[0345] Step 1. The UE receives a first signaling from a network-side device, and determines TCI status information for uplink and downlink transmission based on the first signaling;

[0346] 2.1.1. The TCI status information includes at least one of the following:

[0347] 2.1.1.1. When the number of TCI states indicated by the uplink and downlink is determined to be {DL 2TCI states, UL 2TCI states}, the TCI state information includes two TCI states, each of which includes the following information:

[0348] 2.1.1.1.1.QCL information: SSB or CSI-RS;

[0349] 2.1.1.1.2.UL power parameter information: UL power control parameter set, path loss reference signal index;

[0350] 2.1.1.1.3. Transmission channel or signal indication of application;

[0351] 2.1.1.2. When the number of TCI states indicated in the uplink and downlink is determined to be {DL 1TCI ​​state, UL 2TCI state}, the TCI state information includes two TCI states;

[0352] 2.1.1.2.1. The first TCI status includes:

[0353] 2.1.1.2.1.1.QCL Information: SSB or CSI-RS

[0354] 2.1.1.2.1.2.UL power parameter information: UL power control parameter set, path loss reference signal index;

[0355] 2.1.1.2.2. The second target TCI status includes:

[0356] 2.1.1.2.2.1.QCL information: SSB or CSI-RS or SRS; Optionally, if the second QCL information is configured with a DL RS, it must have the same reference signal index as the QCL information configured for the first target TCI state;

[0357] 2.1.1.2.2.2. Alternatively, do not configure QCL information and configure reference signal information: SRS;

[0358] Note: The second TCI state is only used for uplink transmission, so QCL information may not be configured but SRS may be configured as beam information, or QCL information may be configured but the QCL information may be SRS.

[0359] 2.1.1.2.2.3.UL power parameter information: UL power control parameter set, path loss reference signal index, PL offset

[0360] 2.1.1.3. When the number of TCI states indicated by the uplink and downlink is determined to be {DL 2TCI states, UL 1TCI ​​state}: the TCI state information includes:

[0361] 2.1.1.3.1. The third TCI status includes:

[0362] 2.1.1.3.1.1.QCL information: SSB or CSI-RS;

[0363] 2.1.1.3.1.2.UL power parameter information: UL power control parameter set, path loss reference signal index;

[0364] 2.1.1.3.2. The fourth TCI state includes:

[0365] 2.1.1.3.2.1.QCL information: SSB or CSI-RS;

[0366] 2.1.2. The UE determines the TCI status of the downlink transmission based on the TCI status information:

[0367] 2.1.2.1. Default to the first TCI state among multiple TCI states

[0368] 2.1.2.2. A TCI state without associated power parameter PL offset

[0369] 2.1.2.3. Configuring QCL Information or TCI Status of QCL Information as DL RS

[0370] 2.1.3. The UE determines the TCI status of the uplink transmission based on the TCI status information:

[0371] 2.1.3.1. TCI status without QCL information configured;

[0372] 2.1.3.2. Configure the TCI state of QCL information as SRS;

[0373] 2.1.3.3. TCI status with configured power control parameters.

[0374] Note: The fourth TCI state is only used for uplink transmission, so QCL information may not be configured but SRS may be configured as beam information, or QCL information may be configured but the QCL information may be SRS.

[0375] Example 3: TCI indication method for uplink and downlink transmission in separate TCI state mode

[0376] Step 1. The UE receives first signaling (i.e., first information) from the network side, and determines TCI status information for uplink and downlink transmission based on the first signaling:

[0377] 3.1.1.TCI status indication mode: Joint TCI mode, Separate TCI mode or mixed mode;

[0378] 3.1.2. Downlink TCI state candidate set, the TCI state candidate set contains at least one TCI state configuration;

[0379] 3.1.3. Uplink TCI state candidate set, the TCI state candidate set contains at least one uplink TCI state configuration;

[0380] 3.1.4.1.1. When the transmission mode is: {DL 2TCI state, UL 2TCI state}, the TCI state information includes two DL TCI states and two UL TCI states;

[0381] 3.1.4.1.1.1. Optionally, if the TCI states of the four TCI states are associated with additional PCIs, they can only be associated with the same PCI;

[0382] The scenario is described as follows: When the UE is at the cell edge, it can be allowed to transmit data with the TRP of the serving cell and the TRP of the neighboring cell to improve uplink and downlink data transmission performance. At this time, the UE receives the TCI status indication from the network side and can allow some TCI status to be associated with additional PCI (i.e., neighboring cell). However, considering the UE capabilities, the UE communicates with the current cell and one neighboring cell.

[0383] 3.1.4.1.2. When the transmission mode is: {DL 1TCI ​​state, UL 2TCI state}, the TCI state information includes 1 DL TCI state and two UL TCI states;

[0384] 3.1.4.1.2.1. Optional: Only one of the two UL TCI states can be configured with PL offset information;

[0385] 3.1.4.1.2.2. Optionally, at least one of the two UL TCI states is associated with the same PCI as the DL TCI state.

[0386] Example 4: The UE receives a second signaling (ie, a second message) for updating a power control parameter associated with a TCI state.

[0387] Step 1. The UE receives the second signaling; the second signaling is a MAC CE for activating the TCI state, or the second signaling is a new MAC CE. The MAC CE indicates at least one of the following information:

[0388] 4.2.1.PL-RS ID

[0389] 4.2.2.PL offset

[0390] 4.2.3.TCI Status ID

[0391] Step 2. UE receives the third signaling (i.e., the third information)

[0392] 4.3.1. The third signaling is one of the DCI formats 1_0, 1_1, 1_2, 0_0, 0_1, and 0_2

[0393] 4.3.2. The DCI indicates a code point of the MAC CE

[0394] 4.3.2.1. If the QCL information for the TCI state indicated by the codepoint is the same as the QCL for the currently valid TCI state, the UE shall consider the power control parameter information in the TCI state to be updated to the power control parameter information associated with the TCI state indicated by the codepoint. Furthermore, the updated information shall take effect for the first symbol of the DL or UL transmission scheduled by the DCI or for X OFDM symbols following the third signaling.

[0395] Example 1: The UE receives second signaling, where the second signaling is a MAC CE carrying PL offset information. The UE considers that the PL offset indicated by the MAC CE updates the PL offset associated with the currently indicated target uplink TCI state, where the target TCI state is a TCI state configured with a PL offset.

[0396] Example 2: The UE receives second signaling, where the second signaling is a MAC CE, and the MAC CE carries TCI status indication information and a corresponding PL offset. The UE considers that the PL offset corresponds to updating the PL offset associated with the TCI status.

[0397] Example 3: The UE receives a second signaling, which is a MAC CE, and the MAC CE carries TCI state indication information and a corresponding PL offset. The UE receives a third signaling DCI, and the DCI indicates a set of TCI states and PL offset information (one code point) indicated by the MAC CE. If the QCL information of the TCI state indicated by the code point is the same as the currently valid TCI state QCL, the UE considers that the power control parameter information in the TCI state is updated to the power control parameter information associated with the TCI state indicated by the code point. And the updated information takes effect in the first symbol of the DL or UL transmission scheduled by the DCI or in the X OFDM symbols after the third signaling.

[0398] In summary, the embodiments of the present application provide a new TCI state determination method. In particular, when the number of TCI states for downlink and uplink transmission applications is inconsistent, the TCI states of the uplink and downlink transmission applications can be determined from multiple TCI states, respectively, to achieve flexible and efficient uplink and downlink transmission. The embodiments of the present application are not only applicable to uplink and downlink multi-TRP transmission decoupling scenarios, but also to flexible uplink and downlink multi-TRP transmission scenarios in 6G cell-free scenarios.

[0399] The TCI status determination method provided in the embodiment of the present application can be executed by a TCI status determination device. In the embodiment of the present application, the TCI status determination device provided in the embodiment of the present application is described by taking the TCI status determination device executing the TCI status determination method as an example.

[0400] 5 , an embodiment of the present application further provides a TCI status determination device. As shown in FIG5 , the TCI status determination device 500 includes:

[0401] A first receiving unit 501 is configured to receive first information from a network-side device;

[0402] A first processing unit 502 is configured to determine a TCI state for downlink transmission and a TCI state for uplink transmission based on the first information;

[0403] The first information includes at least one of the following:

[0404] A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode;

[0405] A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2;

[0406] A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states;

[0407] a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied;

[0408] a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states;

[0409] a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states;

[0410] a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states;

[0411] The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

[0412] Optionally, the first processing unit includes:

[0413] The first processing subunit is configured to determine, based on the first information, the number of TCI states used for downlink transmission and the number of TCI states used for uplink transmission.

[0414] Optionally, the number of TCI states used for downlink transmission is different from the number of TCI states used for uplink transmission.

[0415] Optionally, the number of TCI states used for downlink transmission is less than the number of TCI states used for downlink transmission; or,

[0416] The number of TCI states used for downlink transmission is greater than the number of TCI states used for uplink transmission.

[0417] Optionally, the first processing subunit is specifically configured to perform at least one of the following:

[0418] If the first condition is met, determining that the number of TCI states for downlink transmission is 1;

[0419] If the second condition is met, determining that the number of TCI states for uplink transmission is 1;

[0420] If the third condition is met, determining that the number of TCI states for downlink transmission is 2;

[0421] The first condition includes at least one of the following:

[0422] At least one TCI state among the N TCI states is configured with a power offset value;

[0423] Indication information for selecting the TCI state when the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH is not configured;

[0424] The second mode is configured and a media access control MAC element CE with a TCI state activated is received, and all code points of the MAC CE indicate a downlink TCI state;

[0425] The first mode is configured, and a MAC CE with a TCI state activated is received, where all code points of the MAC CE indicate a QCL information;

[0426] The first mode is configured, and a MAC CE for activating a TCI state is received, wherein the TCI state indicated by at least one codepoint of the MAC CE is associated with a power offset value;

[0427] The second condition includes:

[0428] An SRS resource set for uplink transmission is configured;

[0429] The third condition includes:

[0430] A MAC CE for activating a TCI state is received, where at least one code point of the MAC CE indicates two TCI states, or at least one code point of the MAC CE indicates two QCL information.

[0431] Optionally, the first processing unit further includes:

[0432] The second processing subunit is configured to determine information included in a target TCI state based on the first information, the number of TCI states used for downlink transmission, and the number of TCI states used for uplink transmission.

[0433] Optionally, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the target TCI state includes a first TCI state and a second TCI state, and the second TCI state is a TCI state used only for uplink transmission;

[0434] The information contained in the first TCI status includes at least one of the following:

[0435] First QCL information, where the reference signal corresponding to the first QCL information includes a synchronization signal block SSB or a CSI reference signal CSI-RS;

[0436] First uplink power parameter;

[0437] The information included in the second TCI status includes at least one of the following:

[0438] second QCL information, where a reference signal corresponding to the second QCL information includes an SRS;

[0439] Reference signal indication information, where the reference signal indication information is used to indicate an SRS;

[0440] Second uplink power parameter.

[0441] Optionally, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 1, the target TCI state includes a third TCI state and a fourth TCI state, and the fourth TCI state is a TCI state used only for downlink transmission;

[0442] The third TCI state includes at least one of the following:

[0443] third QCL information, where a reference signal corresponding to the third QCL information includes an SSB or a CSI-RS;

[0444] The third uplink power parameter;

[0445] The fourth TCI state includes at least one of the following:

[0446] The fourth QCL information, where the reference signal corresponding to the fourth QCL information includes SSB or CSI-RS.

[0447] Optionally, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the target TCI state includes a fifth TCI state and a sixth TCI state;

[0448] The fifth TCI state includes at least one of the following:

[0449] fifth QCL information, where a reference signal corresponding to the fifth QCL information includes an SSB or a CSI-RS;

[0450] Fourth uplink power parameter;

[0451] an eighth indication, used to indicate a transmission channel or signal applied to the fifth TCI state;

[0452] or,

[0453] The sixth TCI state includes at least one of the following:

[0454] Sixth QCL information, where a reference signal corresponding to the sixth QCL information includes an SSB or a CSI-RS;

[0455] Fifth uplink power parameter;

[0456] The ninth indication is used to indicate the transmission channel or signal applied to the sixth TCI state.

[0457] Optionally, the device further comprises:

[0458] The second processing unit is configured to determine a first target TCI state and a second target TCI state based on information included in the target TCI state, where the first target TCI state is a TCI state for downlink transmission and the second target TCI state is a TCI state for uplink transmission.

[0459] The first target TCI status includes at least one of the following:

[0460] The first TCI state among the default multiple TCI states;

[0461] TCI status without associated power offset value;

[0462] TCI status configured with QCL information;

[0463] The reference signal corresponding to the configured QCL information is the TCI state of the downlink reference signal;

[0464] or,

[0465] The second target TCI state includes at least one of the following:

[0466] TCI status without QCL information configured;

[0467] The reference signal corresponding to the configured QCL information is the TCI state of the SRS;

[0468] TCI status with uplink power parameters configured.

[0469] Optionally, when the TCI mode is the second mode, the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the target TCI state includes a seventh TCI state, an eighth TCI state, and a ninth TCI state, the seventh TCI state is a TCI state for downlink transmission, and the eighth TCI state and the ninth TCI state are TCI states for uplink transmission;

[0470] wherein at most one of the eighth TCI state and the ninth TCI state is configured with a power offset value;

[0471] or,

[0472] At least one of the eighth TCI state and the ninth TCI state is associated with the same physical cell identifier (PCI) as the seventh TCI state.

[0473] Optionally, when the TCI mode is the second mode, the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the target TCI state includes four TCI states;

[0474] In the case where at least one TCI state of the four TCI states is associated with an additional PCI, the additional PCI associated with the at least one TCI state is the same PCI, and the additional PCI is the PCI of the neighboring cell.

[0475] Optionally, the device further comprises:

[0476] a second receiving unit, configured to receive second information from the network-side device, where the second information is used to update a power control parameter of at least one TCI state in the target TCI state;

[0477] The second information includes at least one of the following:

[0478] Power offset value;

[0479] TCI status indicator.

[0480] Optionally, the device further comprises:

[0481] a third receiving unit, configured to receive third information from the network-side device, where the third information is used to indicate a target code point of the second information, where the second information is a MAC CE;

[0482] The third processing unit is used to update the power control parameter of the at least one TCI state to the power control parameter associated with the TCI state indicated by the target code point when the QCL information of the TCI state indicated by the target code point is the same as the QCL information of the at least one TCI state.

[0483] Optionally, the third information is downlink control information DCI;

[0484] The effective time for updating the power control parameter of the at least one TCI state includes any one of the following:

[0485] a first symbol of downlink transmission or uplink transmission scheduled by the third information;

[0486] X orthogonal frequency division multiplexing (OFDM) symbols following the third information, where X is an integer greater than or equal to 1.

[0487] Optionally, the third information includes any one of DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, and DCI format 0_2.

[0488] The TCI status determination device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal, or it can be other devices other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0489] The TCI status determination device provided in the embodiment of the present application can implement the various processes implemented in the method embodiment of Figure 3 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0490] The information transmission method provided in the embodiment of the present application can be executed by an information transmission device. In the embodiment of the present application, the information transmission device provided in the embodiment of the present application is described by taking the information transmission method executed by the information transmission device as an example.

[0491] 6 , an embodiment of the present application further provides an information transmission device. As shown in FIG6 , the information transmission device 600 includes:

[0492] A first sending unit 601 is configured to send first information to a terminal;

[0493] The first information includes at least one of the following:

[0494] A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode;

[0495] A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2;

[0496] A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states;

[0497] a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied;

[0498] a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states;

[0499] a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states;

[0500] a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states;

[0501] The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

[0502] Optionally, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the N TCI states include a first TCI state and a second TCI state, and the second TCI state is a TCI state used only for uplink transmission;

[0503] The information contained in the first TCI status includes at least one of the following:

[0504] First QCL information, where the reference signal corresponding to the first QCL information includes a synchronization signal block SSB or a CSI reference signal CSI-RS;

[0505] First uplink power parameter;

[0506] The information included in the second TCI status includes at least one of the following:

[0507] second QCL information, where a reference signal corresponding to the second QCL information includes an SRS;

[0508] Reference signal indication information, where the reference signal indication information is used to indicate an SRS;

[0509] Second uplink power parameter.

[0510] Optionally, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 1, the N TCI states include a third TCI state and a fourth TCI state, and the fourth TCI state is a TCI state used only for downlink transmission;

[0511] The third TCI status includes at least one of the following:

[0512] third QCL information, where a reference signal corresponding to the third QCL information includes an SSB or a CSI-RS;

[0513] The third uplink power parameter;

[0514] The fourth TCI state includes at least one of the following:

[0515] The fourth QCL information, where the reference signal corresponding to the fourth QCL information includes SSB or CSI-RS.

[0516] Optionally, when the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the N TCI states include a fifth TCI state and a sixth TCI state;

[0517] The fifth TCI state includes at least one of the following:

[0518] fifth QCL information, where a reference signal corresponding to the fifth QCL information includes an SSB or a CSI-RS;

[0519] Fourth uplink power parameter;

[0520] an eighth indication, used to indicate a transmission channel or signal applied to the fifth TCI state;

[0521] or,

[0522] The sixth TCI state includes at least one of the following:

[0523] Sixth QCL information, where a reference signal corresponding to the sixth QCL information includes an SSB or a CSI-RS;

[0524] Fifth uplink power parameter;

[0525] The ninth indication is used to indicate the transmission channel or signal applied to the sixth TCI state.

[0526] Optionally, when the TCI mode is the second mode, the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the N TCI states include a seventh TCI state, an eighth TCI state, and a ninth TCI state, the seventh TCI state is a TCI state for downlink transmission, and the eighth TCI state and the ninth TCI state are TCI states for uplink transmission;

[0527] wherein at most one of the eighth TCI state and the ninth TCI state is configured with a power offset value;

[0528] or,

[0529] At least one of the eighth TCI state and the ninth TCI state is associated with the same physical cell identifier (PCI) as the seventh TCI state.

[0530] Optionally, when the TCI mode is the second mode, the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the N TCI states include four TCI states;

[0531] In the case where at least one TCI state of the four TCI states is associated with an additional PCI, the additional PCI associated with the at least one TCI state is the same PCI, and the additional PCI is the PCI of the neighboring cell.

[0532] Optionally, the device further comprises:

[0533] a second sending unit, configured to send second information to the terminal, where the second information is used to update a power control parameter of at least one TCI state among the N TCI states;

[0534] The second information includes at least one of the following:

[0535] Power offset value;

[0536] TCI status indicator.

[0537] Optionally, the device further comprises:

[0538] A third sending unit, configured to send third information to the terminal, where the third information is used to indicate a target code point of the second information, where the second information is a MAC CE;

[0539] When the QCL information of the TCI state indicated by the target code point is the same as the QCL information of the at least one TCI state, the power control parameter of the at least one TCI state needs to be updated to the power control parameter associated with the TCI state indicated by the target code point.

[0540] Optionally, the third information is downlink control information DCI;

[0541] The effective time for updating the power control parameter of the at least one TCI state includes any one of the following:

[0542] a first symbol of downlink transmission or uplink transmission scheduled by the third information;

[0543] X orthogonal frequency division multiplexing (OFDM) symbols following the third information, where X is an integer greater than or equal to 1.

[0544] Optionally, the third information includes any one of DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, and DCI format 0_2.

[0545] The information transmission device in the embodiments of the present application can be an electronic device, such as an electronic device with an operating system, or a component in an electronic device, such as an integrated circuit or chip. The electronic device can be a terminal, or it can be other devices other than a terminal. For example, the terminal can include but is not limited to the types of terminal 11 listed above, and other devices can be servers, network attached storage (NAS), etc., which are not specifically limited in the embodiments of the present application.

[0546] The information transmission device provided in the embodiment of the present application can implement each process implemented in the method embodiment of Figure 4 and achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0547] As shown in Figure 7, an embodiment of the present application further provides a communication device 700, including a processor 701 and a memory 702. The memory 702 stores a program or instruction that can be run on the processor 701. For example, when the communication device 700 is a terminal, the program or instruction, when executed by the processor 701, implements the various steps of the above-mentioned terminal-side method embodiment and can achieve the same technical effect. When the communication device 700 is a network-side device, the program or instruction, when executed by the processor 701, implements the various steps of the above-mentioned network-side device-side method embodiment and can achieve the same technical effect. To avoid repetition, they are not further described here.

[0548] The present application also provides a terminal comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG3 . This terminal embodiment corresponds to the aforementioned terminal-side method embodiment, and each implementation process and implementation method of the aforementioned method embodiment is applicable to this terminal embodiment and can achieve the same technical effects. Specifically, FIG8 is a schematic diagram of the hardware structure of a terminal implementing an embodiment of the present application.

[0549] The terminal 800 includes but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809 and at least some of the components of the processor 810.

[0550] Those skilled in the art will appreciate that the terminal 800 may also include a power supply (such as a battery) to power various components. The power supply may be logically connected to the processor 810 via a power management system, thereby enabling the power management system to manage charging, discharging, and power consumption. The terminal structure shown in FIG8 does not limit the terminal. The terminal may include more or fewer components than shown, or may combine certain components, or have different component arrangements, which will not be described in detail here.

[0551] It should be understood that in an embodiment of the present application, the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042, and the graphics processor 8041 processes the image data of a static picture or video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, etc. The user input unit 807 includes a touch panel 8071 and at least one of other input devices 8072. The touch panel 8071 is also called a touch screen. The touch panel 8071 may include two parts: a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which will not be repeated here.

[0552] In the embodiment of the present application, after receiving downlink data from a network-side device, the radio frequency unit 801 may transmit the data to the processor 810 for processing. Furthermore, the radio frequency unit 801 may send uplink data to the network-side device. Typically, the radio frequency unit 801 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, and the like.

[0553] The memory 809 can be used to store software programs or instructions and various data. The memory 809 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, applications or instructions required for at least one function (such as a sound playback function, an image playback function, etc.). In addition, the memory 809 may include a volatile memory or a non-volatile memory. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DRRAM). The memory 809 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

[0554] Processor 810 may include one or more processing units. Optionally, processor 810 integrates an application processor and a modem processor. The application processor primarily handles operations related to the operating system, user interface, and application programs, while the modem processor primarily processes wireless communication signals, such as a baseband processor. It is understood that the modem processor may not be integrated into processor 810.

[0555] The radio frequency unit 801 is used for:

[0556] receiving first information from a network-side device;

[0557] The processor 810 is configured to:

[0558] Determining, based on the first information, a TCI state for downlink transmission and a TCI state for uplink transmission;

[0559] The first information includes at least one of the following:

[0560] A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode;

[0561] A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2;

[0562] A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states;

[0563] a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied;

[0564] a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states;

[0565] a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states;

[0566] a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states;

[0567] The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

[0568] In this embodiment of the present application, the terminal can determine the TCI state for uplink transmission and the TCI state for downlink transmission based on the first information sent by the network-side device. In this way, the terminal can interpret uplink and downlink transmission signaling based on the determined uplink and downlink TCI states, thereby ensuring uplink and downlink transmission performance.

[0569] It can be understood that the implementation process of each implementation method mentioned in this embodiment can refer to the relevant description of the TCI status determination method embodiment and achieve the same or corresponding technical effects. To avoid repetition, it will not be repeated here.

[0570] The present application also provides a network-side device, including a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is configured to execute a program or instruction to implement the steps of the method embodiment shown in FIG4 . This network-side device embodiment corresponds to the aforementioned network-side device method embodiment, and each implementation process and implementation method of the aforementioned method embodiment are applicable to this network-side device embodiment and can achieve the same technical effects.

[0571] Specifically, embodiments of the present application also provide a network-side device. As shown in Figure 9, the network-side device 900 includes an antenna 91, a radio frequency device 92, a baseband device 93, a processor 94, and a memory 95. Antenna 91 is connected to radio frequency device 92. In the uplink direction, radio frequency device 92 receives information via antenna 91 and sends the received information to baseband device 93 for processing. In the downlink direction, baseband device 93 processes the information to be transmitted and sends it to radio frequency device 92. Radio frequency device 92 processes the received information and then sends it through antenna 91.

[0572] The method executed by the network-side device in the above embodiment may be implemented in the baseband device 93 , which includes a baseband processor.

[0573] The baseband device 93 may include, for example, at least one baseband board, on which multiple chips are arranged, as shown in Figure 9, one of the chips is, for example, a baseband processor, which is connected to the memory 95 through a bus interface to call the program in the memory 95 and execute the network side device operations shown in the above method embodiment.

[0574] The network side device may further include a network interface 96, which is, for example, a Common Public Radio Interface (CPRI).

[0575] Specifically, the network side device 900 of the embodiment of the present application also includes: instructions or programs stored in the memory 95 and executable on the processor 94. The processor 94 calls the instructions or programs in the memory 95 to execute the methods of execution of each module shown in FIG6 and achieve the same technical effect. To avoid repetition, it will not be described here.

[0576] An embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the various processes of the above-mentioned TCI status determination method embodiment or the various processes of the above-mentioned information transmission method embodiment are implemented, and the same technical effect can be achieved. To avoid repetition, it will not be repeated here.

[0577] The processor is the processor in the terminal described in the above embodiment. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. In some examples, the readable storage medium may be a non-transitory readable storage medium.

[0578] An embodiment of the present application further provides a chip, which includes a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the various processes of the above-mentioned TCI status determination method embodiment, or to implement the various processes of the above-mentioned information transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0579] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0580] An embodiment of the present application further provides a computer program / program product, which is stored in a storage medium. The computer program / program product is executed by at least one processor to implement the various processes of the above-mentioned TCI status determination method embodiment, or to implement the various processes of the above-mentioned information transmission method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be repeated here.

[0581] An embodiment of the present application also provides a communication system, including: a terminal and a network side device, wherein the terminal can be used to execute the steps of the TCI status determination method described above, and the network side device can be used to execute the steps of the information transmission method described above.

[0582] It should be noted that, in this article, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved. For example, the described method may be performed in an order different from that described, and various steps may also be added, omitted or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0583] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of a computer software product plus a necessary general-purpose hardware platform, or of course, by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disk, optical disk, etc.) and includes a number of instructions for enabling a terminal or network-side device to execute the methods described in each embodiment of the present application.

[0584] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of this application, ordinary technicians in this field can also make many forms of implementation methods without departing from the purpose of this application and the scope of protection of the claims. These implementation methods are all within the protection of this application.

Claims

1. A method for determining a transmission configuration indication (TCI) state, comprising: The terminal receives first information from the network side device; Determining, by the terminal, a TCI state for downlink transmission and a TCI state for uplink transmission based on the first information; The first information includes at least one of the following: A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode; A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2; A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states; a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied; a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states; a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states; a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states; The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

2. The method according to claim 1, wherein The terminal determines, based on the first information, a TCI state for downlink transmission and a TCI state for uplink transmission, including: The terminal determines, based on the first information, the number of TCI states used for downlink transmission and the number of TCI states used for uplink transmission.

3. The method according to claim 1, wherein The number of the TCI states used for downlink transmission is different from the number of the TCI states used for uplink transmission.

4. The method according to claim 2 or 3, wherein: Determining, by the terminal based on the first information, the number of TCI states for downlink transmission and the number of TCI states for uplink transmission, including at least one of the following: When the first condition is met, the terminal determines that the number of TCI states for downlink transmission is 1; When the second condition is met, the terminal determines that the number of TCI states for uplink transmission is 1; If the third condition is met, the terminal determines that the number of TCI states for downlink transmission is 2; The first condition includes at least one of the following: At least one TCI state among the N TCI states is configured with a power offset value; Indication information for selecting the TCI state when the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH is not configured; The second mode is configured, and the terminal receives a media access control MAC element CE with a TCI state activated, and all code points of the MAC CE indicate a downlink TCI state; The first mode is configured, and the terminal receives a MAC CE in which a TCI state is activated, and all code points of the MAC CE indicate a QCL information; The first mode is configured, and the terminal receives a MAC CE that activates a TCI state, and the TCI state indicated by at least one codepoint of the MAC CE is associated with a power offset value; The second condition includes: An SRS resource set for uplink transmission is configured; The third condition includes: The terminal receives a MAC CE that activates a TCI state, where at least one code point of the MAC CE indicates two TCI states, or at least one code point of the MAC CE indicates two QCL information.

5. The method according to any one of claims 2 to 4, wherein The terminal determines, based on the first information, a TCI state for downlink transmission and a TCI state for uplink transmission, further comprising: The terminal determines information included in a target TCI state based on the first information, the number of TCI states used for downlink transmission, and the number of TCI states used for uplink transmission.

6. The method according to claim 5, wherein: When the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the target TCI state includes a first TCI state and a second TCI state, and the second TCI state is a TCI state used only for uplink transmission; The information contained in the first TCI status includes at least one of the following: First QCL information, where the reference signal corresponding to the first QCL information includes a synchronization signal block SSB or a CSI reference signal CSI-RS; First uplink power parameter; The information included in the second TCI status includes at least one of the following: second QCL information, where a reference signal corresponding to the second QCL information includes an SRS; Reference signal indication information, where the reference signal indication information is used to indicate an SRS; Second uplink power parameter.

7. The method according to claim 5, wherein: When the TCI mode is the first mode or the third mode, the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 1, the target TCI state includes a third TCI state and a fourth TCI state, and the fourth TCI state is a TCI state used only for downlink transmission. The third TCI status includes at least one of the following: third QCL information, where a reference signal corresponding to the third QCL information includes an SSB or a CSI-RS; The third uplink power parameter; The fourth TCI state includes at least one of the following: The fourth QCL information, where the reference signal corresponding to the fourth QCL information includes SSB or CSI-RS.

8. The method according to claim 5, wherein When the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the target TCI state includes a fifth TCI state and a sixth TCI state; The fifth TCI state includes at least one of the following: fifth QCL information, where a reference signal corresponding to the fifth QCL information includes an SSB or a CSI-RS; Fourth uplink power parameter; an eighth indication, used to indicate a transmission channel or signal applied to the fifth TCI state; or, The sixth TCI state includes at least one of the following: Sixth QCL information, where a reference signal corresponding to the sixth QCL information includes an SSB or a CSI-RS; Fifth uplink power parameter; The ninth indication is used to indicate the transmission channel or signal applied to the sixth TCI state.

9. The method according to any one of claims 6 to 8, further comprising: The terminal determines, according to information included in the target TCI state, a first target TCI state and a second target TCI state, where the first target TCI state is a TCI state for downlink transmission and the second target TCI state is a TCI state for uplink transmission; The first target TCI status includes at least one of the following: The first TCI state among the default multiple TCI states; TCI status without associated power offset value; TCI status configured with QCL information; The reference signal corresponding to the configured QCL information is the TCI state of the downlink reference signal; or, The second target TCI state includes at least one of the following: TCI status without QCL information configured; The reference signal corresponding to the configured QCL information is the TCI state of the SRS; TCI status with uplink power parameters configured.

10. The method according to claim 5, wherein When the TCI mode is the second mode, the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the target TCI state includes a seventh TCI state, an eighth TCI state, and a ninth TCI state, the seventh TCI state is a TCI state for downlink transmission, and the eighth TCI state and the ninth TCI state are TCI states for uplink transmission; wherein at most one of the eighth TCI state and the ninth TCI state is configured with a power offset value; or, At least one of the eighth TCI state and the ninth TCI state is associated with the same physical cell identifier (PCI) as the seventh TCI state.

11. The method according to claim 5, wherein: When the TCI mode is the second mode, the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the target TCI state includes four TCI states; In the case where at least one TCI state of the four TCI states is associated with an additional PCI, the additional PCI associated with the at least one TCI state is the same PCI, and the additional PCI is the PCI of the neighboring cell.

12. The method according to any one of claims 5 to 11, further comprising: The terminal receives second information from the network-side device, where the second information is used to update a power control parameter of at least one TCI state in the target TCI state; The second information includes at least one of the following: Power offset value; TCI status indicator.

13. The method according to claim 12, further comprising: The terminal receives third information from the network-side device, where the third information is used to indicate a target code point of the second information, where the second information is a MAC CE; When the QCL information of the TCI state indicated by the target code point is the same as the QCL information of the at least one TCI state, the terminal updates the power control parameter of the at least one TCI state to the power control parameter associated with the TCI state indicated by the target code point.

14. The method according to claim 13, wherein The third information is downlink control information DCI; The effective time for updating the power control parameter of the at least one TCI state includes any one of the following: a first symbol of downlink transmission or uplink transmission scheduled by the third information; X orthogonal frequency division multiplexing (OFDM) symbols following the third information, where X is an integer greater than or equal to 1.

15. The method according to claim 14, wherein The third information includes any one of DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, and DCI format 0_2.

16. An information transmission method, comprising: The network side device sends first information to the terminal; The first information includes at least one of the following: A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode; A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2; A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states; a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied; a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states; a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states; a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states; The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

17. The method according to claim 16, wherein When the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the N TCI states include a first TCI state and a second TCI state, and the second TCI state is a TCI state used only for uplink transmission; The information contained in the first TCI status includes at least one of the following: First QCL information, where the reference signal corresponding to the first QCL information includes a synchronization signal block SSB or a CSI reference signal CSI-RS; First uplink power parameter; The information included in the second TCI status includes at least one of the following: second QCL information, where a reference signal corresponding to the second QCL information includes an SRS; Reference signal indication information, where the reference signal indication information is used to indicate an SRS; Second uplink power parameter.

18. The method according to claim 16, wherein When the TCI mode is the first mode or the third mode, the number of TCI states used for downlink transmission is 2, and the number of TCI states used for uplink transmission is 1, the N TCI states include a third TCI state and a fourth TCI state, and the fourth TCI state is a TCI state used only for downlink transmission; The third TCI state includes at least one of the following: third QCL information, where a reference signal corresponding to the third QCL information includes an SSB or a CSI-RS; The third uplink power parameter; The fourth TCI state includes at least one of the following: The fourth QCL information, where the reference signal corresponding to the fourth QCL information includes SSB or CSI-RS.

19. The method according to claim 16, wherein When the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the N TCI states include a fifth TCI state and a sixth TCI state; The fifth TCI state includes at least one of the following: fifth QCL information, where a reference signal corresponding to the fifth QCL information includes an SSB or a CSI-RS; Fourth uplink power parameter; an eighth indication, used to indicate a transmission channel or signal applied to the fifth TCI state; or, The sixth TCI state includes at least one of the following: Sixth QCL information, where a reference signal corresponding to the sixth QCL information includes an SSB or a CSI-RS; Fifth uplink power parameter; The ninth indication is used to indicate the transmission channel or signal applied to the sixth TCI state.

20. The method according to claim 16, wherein When the TCI mode is the second mode, the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the N TCI states include a seventh TCI state, an eighth TCI state, and a ninth TCI state, the seventh TCI state is a TCI state for downlink transmission, and the eighth TCI state and the ninth TCI state are TCI states for uplink transmission; wherein at most one of the eighth TCI state and the ninth TCI state is configured with a power offset value; or, At least one of the eighth TCI state and the ninth TCI state is associated with the same physical cell identifier (PCI) as the seventh TCI state.

21. The method according to claim 16, wherein When the TCI mode is the second mode, the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 2, the N TCI states include four TCI states; In the case where at least one TCI state of the four TCI states is associated with an additional PCI, the additional PCI associated with the at least one TCI state is the same PCI, and the additional PCI is the PCI of the neighboring cell.

22. The method according to any one of claims 16 to 21, further comprising: The network side device sends second information to the terminal, where the second information is used to update a power control parameter of at least one TCI state among the N TCI states; The second information includes at least one of the following: Power offset value; TCI status indicator.

23. The method according to claim 22, further comprising: The network-side device sends third information to the terminal, where the third information is used to indicate a target code point of the second information, where the second information is a MAC CE; When the QCL information of the TCI state indicated by the target code point is the same as the QCL information of the at least one TCI state, the power control parameter of the at least one TCI state needs to be updated to the power control parameter associated with the TCI state indicated by the target code point.

24. The method according to claim 23, wherein The third information is downlink control information DCI; The effective time for updating the power control parameter of the at least one TCI state includes any one of the following: a first symbol of downlink transmission or uplink transmission scheduled by the third information; X orthogonal frequency division multiplexing (OFDM) symbols following the third information, where X is an integer greater than or equal to 1.

25. The method according to claim 24, wherein The third information includes any one of DCI format 1_0, DCI format 1_1, DCI format 1_2, DCI format 0_0, DCI format 0_1, and DCI format 0_2.

26. A device for determining a transmission configuration indication (TCI) state, the device comprising: A first receiving unit, configured to receive first information from a network-side device; a first processing unit, configured to determine a TCI state for downlink transmission and a TCI state for uplink transmission based on the first information; The first information includes at least one of the following: A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode; A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2; A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states; a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied; a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states; a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states; a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states; The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

27. The device according to claim 26, wherein The first processing unit includes: The first processing subunit is configured to determine, based on the first information, the number of TCI states used for downlink transmission and the number of TCI states used for uplink transmission.

28. The apparatus according to claim 27, wherein The first processing subunit is specifically configured to: If the first condition is met, determining that the number of TCI states for downlink transmission is 1; If the second condition is met, determining that the number of TCI states for uplink transmission is 1; If the third condition is met, determining that the number of TCI states for downlink transmission is 2; The first condition includes at least one of the following: At least one TCI state among the N TCI states is configured with a power offset value; Indication information for selecting the TCI state when the physical downlink control channel PDCCH or the physical downlink shared channel PDSCH is not configured; The second mode is configured and a media access control MAC element CE with a TCI state activated is received, and all code points of the MAC CE indicate a downlink TCI state; The first mode is configured, and a MAC CE with a TCI state activated is received, where all code points of the MAC CE indicate a QCL information; The first mode is configured, and a MAC CE for activating a TCI state is received, wherein the TCI state indicated by at least one codepoint of the MAC CE is associated with a power offset value; The second condition includes: An SRS resource set for uplink transmission is configured; The third condition includes: A MAC CE for activating a TCI state is received, where at least one code point of the MAC CE indicates two TCI states, or at least one code point of the MAC CE indicates two QCL information.

29. The device according to claim 27 or 28, wherein The first processing unit further includes: The second processing subunit is configured to determine information included in a target TCI state based on the first information, the number of TCI states used for downlink transmission, and the number of TCI states used for uplink transmission.

30. The apparatus according to claim 29, wherein When the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the target TCI state includes a first TCI state and a second TCI state, and the second TCI state is a TCI state used only for uplink transmission; The information contained in the first TCI status includes at least one of the following: First QCL information, where the reference signal corresponding to the first QCL information includes a synchronization signal block SSB or a CSI reference signal CSI-RS; First uplink power parameter; The information included in the second TCI status includes at least one of the following: second QCL information, where a reference signal corresponding to the second QCL information includes an SRS; Reference signal indication information, where the reference signal indication information is used to indicate an SRS; Second uplink power parameter.

31. The apparatus according to claim 29, wherein When the TCI mode is the first mode or the third mode, the number of TCI states for downlink transmission is 2, and the number of TCI states for uplink transmission is 1, the target TCI state includes a third TCI state and a fourth TCI state, and the fourth TCI state is a TCI state used only for downlink transmission. The third TCI state includes at least one of the following: third QCL information, where a reference signal corresponding to the third QCL information includes an SSB or a CSI-RS; The third uplink power parameter; The fourth TCI state includes at least one of the following: The fourth QCL information, where the reference signal corresponding to the fourth QCL information includes SSB or CSI-RS.

32. The apparatus according to any one of claims 29 to 31, further comprising: The second processing unit is configured to determine a first target TCI state and a second target TCI state based on information included in the target TCI state, where the first target TCI state is a TCI state for downlink transmission and the second target TCI state is a TCI state for uplink transmission. The first target TCI status includes at least one of the following: The first TCI state among the default multiple TCI states; TCI status without associated power offset value; TCI status configured with QCL information; The reference signal corresponding to the configured QCL information is the TCI state of the downlink reference signal; or, The second target TCI state includes at least one of the following: TCI status without QCL information configured; The reference signal corresponding to the configured QCL information is the TCI state of the SRS; TCI status with uplink power parameters configured.

33. An information transmission device, comprising: A first sending unit, configured to send first information to a terminal; The first information includes at least one of the following: A first indication is used to indicate a TCI mode, where the TCI mode includes any one of a first mode, a second mode, and a third mode, where the first mode is a joint TCI mode, the second mode is an independent TCI mode, and the third mode is a mode other than the joint TCI mode and the independent TCI mode; A TCI state candidate set, where the TCI state candidate set includes N TCI states, where N is an integer greater than or equal to 2; A second indication, used to indicate a reference signal type of at least one TCI state among the N TCI states; a third indication, used to indicate a transmission channel or signal to which at least one TCI state among the N TCI states is applied; a fourth indication, used to indicate a power offset value for uplink transmission in at least one TCI state among the N TCI states; a fifth indication, used to indicate quasi-co-site QCL information of at least one TCI state among the N TCI states; a sixth indication, used to indicate an uplink transmission power parameter of at least one TCI state among the N TCI states; The seventh indication is used to indicate a sounding reference signal SRS resource set used for uplink transmission.

34. The apparatus according to claim 33, wherein When the TCI mode is the first mode or the third mode, and the number of TCI states for downlink transmission is 1, and the number of TCI states for uplink transmission is 2, the N TCI states include a first TCI state and a second TCI state, and the second TCI state is a TCI state used only for uplink transmission; The information contained in the first TCI status includes at least one of the following: First QCL information, where the reference signal corresponding to the first QCL information includes a synchronization signal block SSB or a CSI reference signal CSI-RS; First uplink power parameter; The information included in the second TCI status includes at least one of the following: second QCL information, where a reference signal corresponding to the second QCL information includes an SRS; Reference signal indication information, where the reference signal indication information is used to indicate an SRS; Second uplink power parameter.

35. The apparatus of claim 33, wherein: When the TCI mode is the first mode or the third mode, the number of TCI states used for downlink transmission is 2, and the number of TCI states used for uplink transmission is 1, the N TCI states include a third TCI state and a fourth TCI state, and the fourth TCI state is a TCI state used only for downlink transmission; The third TCI status includes at least one of the following: third QCL information, where a reference signal corresponding to the third QCL information includes an SSB or a CSI-RS; The third uplink power parameter; The fourth TCI state includes at least one of the following: The fourth QCL information, where the reference signal corresponding to the fourth QCL information includes SSB or CSI-RS.

36. A communication device comprising a processor and a memory, wherein the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, the steps of the TCI status determination method described in any one of claims 1 to 15 are implemented, or the steps of the information transmission method described in any one of claims 16 to 25 are implemented.

37. A readable storage medium storing a program or instruction, wherein the program or instruction, when executed by a processor, implements the steps of the TCI status determination method as described in any one of claims 1 to 15, or implements the steps of the information transmission method as described in any one of claims 16 to 25.

38. A computer program product comprising computer instructions, which, when executed by a processor, implement the steps of the TCI status determination method according to any one of claims 1 to 15, or implement the steps of the information transmission method according to any one of claims 16 to 25.

Images