Method, device, terminal and storage medium for determining transmission configuration indication

Abstract

The present disclosure provides a method, device, terminal and storage medium for determining a transmission configuration indication, and relates to the field of communication technology. The method comprises: receiving M downlink control information DCIs sent by a network device, each of the M DCIs containing a transmission configuration indication TCI state, and the M DCIs containing a reference DCI, where M is a positive integer; determining a unified TCI state used for communication transmission based on a target TCI state contained in the reference DCI. The present disclosure provides a solution to the problem of how to determine a unified transmission configuration indication used for communication transmission, so that the terminal device and the network device reach a consensus on the TCI state adoption time, ensure beam consistency, and improve the transmission performance between the terminal device and the network device based on the transmission configuration indication.

Description

Technical Field

[0001] The present application relates to the field of communication technologies, and in particular to a method, device, terminal, and storage medium for determining a transmission configuration indication. Background Art

[0002] In the field of communications technology, the use of common beams has been introduced to reduce signaling overhead. For example, if a base station indicates a common beam for downlink, then this beam can be used for the terminal's Physical Downlink Shared Channel (PDSCH), at least a portion of the Physical Downlink Control Channel (PDCCH), and some downlink reference signals. If the base station indicates a common beam for uplink, then this beam can be used for the terminal's Physical Uplink Shared Channel (PUSCH), at least a portion of the Physical Uplink Control Channel (PUCCH), and some uplink reference signals.

[0003] In related technologies, the transmission configuration indication state (TCI state) in the downlink control information (DCI) is used to indicate the general beam. Whether the information of the general beam is received correctly requires the hybrid automatic repeat request (HARQ) response (ACK) codebook to carry the HARQ-ACK information corresponding to the DCI and feed it back to the base station to determine.

[0004] Currently, the HARQ-ACK codebook can contain HARQ-ACK information corresponding to multiple DCIs. When a HARQ-ACK codebook contains HARQ-ACK information for multiple DCIs, and multiple DCIs all contain TCI status indications, the terminal determines which DCI's HARQ-ACK information to use as the basis for determining the TCI state in which DCI to use, thereby determining the general beam to use. This is a problem that needs to be solved. Summary of the Invention

[0005] The present disclosure provides a method, apparatus, terminal, and storage medium for determining a transmission configuration indication. These methods address the issue of determining a general beam for communication transmission when the HARQ-ACK codebook includes HARQ-ACK information corresponding to multiple DCIs, and each of the multiple DCIs includes a TCI status indication. The technical solution is as follows:

[0006] According to one aspect of the present disclosure, a method for determining a transmission configuration indication is provided, which is applied to a terminal device, and the method includes:

[0007] Receive M downlink control information DCIs sent by a network device, where each of the M DCIs includes a transmission configuration indication (TCI) state, and the M DCIs include a reference DCI, where M is a positive integer;

[0008] A unified TCI state used for communication transmission is determined based on the target TCI state included in the reference DCI.

[0009] According to one aspect of the present disclosure, a transmission configuration indication determining device is provided, the device comprising:

[0010] A receiving module, configured to receive M downlink control information DCIs sent by a network device, wherein each of the M DCIs includes a transmission configuration indication TCI state, and the M DCIs include a reference DCI, where M is a positive integer;

[0011] The determination module is configured to determine a unified TCI state used for communication transmission based on a target TCI state included in the reference DCI.

[0012] According to one aspect of the present disclosure, a terminal is provided, comprising: a processor; and a transceiver connected to the processor; wherein the processor is configured to load and execute executable instructions to implement the above-mentioned transmission configuration indication determination method.

[0013] According to one aspect of the present disclosure, a computer-readable storage medium is provided, in which at least one instruction, at least one program, a code set or an instruction set is stored. The at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by a processor to implement the transmission configuration indication determination method as described above.

[0014] The beneficial effects of the technical solutions provided by the embodiments of the present disclosure include at least:

[0015] When a terminal device receives M DCIs sent by a network device, and each of the M DCIs includes a TCI status, the terminal device determines the general beam used for communication transmission based on the TCI status included in the reference DCI in the M DCIs, where M is a positive integer. Specifically, the present disclosure provides a solution to the problem of how to determine the general beam used for communication transmission, enabling the terminal device and the network device to reach a consensus on the TCI status adoption time, ensuring beam consistency, and improving the performance of beam-based transmission between the terminal device and the network device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 is a schematic diagram of a communication system provided by an exemplary embodiment of the present disclosure;

[0018] Figure 2 is a flowchart of a method for determining a transmission configuration indication provided by an exemplary embodiment of the present disclosure;

[0019] Figure 3 is a flowchart of a method for determining a transmission configuration indication provided by another exemplary embodiment of the present disclosure;

[0020] Figure 4 is a flowchart of a method for determining a transmission configuration indication provided by another exemplary embodiment of the present disclosure;

[0021] Figure 5 is a flowchart of a method for determining a transmission configuration indication provided by another exemplary embodiment of the present disclosure;

[0022] Figure 6 is a flowchart of a method for determining a transmission configuration indication provided by another exemplary embodiment of the present disclosure;

[0023] Figure 7 is a flowchart of a method for determining a transmission configuration indication provided by another exemplary embodiment of the present disclosure;

[0024] Figure 8 is a structural block diagram of a transmission configuration indication determination device provided by an exemplary embodiment of the present disclosure;

[0025] Figure 9 is a structural block diagram of a transmission configuration indication determination device provided by another exemplary embodiment of the present disclosure;

[0026] Figure 10 It is a structural diagram of a communication device provided by an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0027] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0028] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, unless otherwise indicated, like numbers in different figures represent like or similar elements. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0029] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0030] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, for example, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining."

[0031] Please refer to Figure 1 , which shows a schematic diagram of a communication system provided by an embodiment of the present disclosure. The communication system may include: a terminal device 10 and a network device 20.

[0032] There are usually multiple terminal devices 10, and one or more terminal devices 10 can be distributed in each cell managed by each network device 20. The terminal devices 10 can include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), mobile stations (MS), etc. For the convenience of description, in the embodiments of the present application, the devices mentioned above are collectively referred to as terminal devices.

[0033] Network device 20 is a device deployed in an access network to provide wireless communication capabilities for terminal device 10. Network device 20 may include various forms of macro base stations, micro base stations, relay stations, and access points. In systems using different wireless access technologies, the names of devices with network device functions may vary. For example, in 5G NR systems, they are called gNodeBs or gNBs. As communication technologies evolve, the term "network device" may change. For ease of description, in the embodiments of the present application, the aforementioned devices providing wireless communication capabilities for terminal device 10 are collectively referred to as network devices. A connection can be established between network device 20 and terminal device 10 via an air interface, thereby enabling communication, including signaling and data exchange, via this connection. There can be multiple network devices 20, and two adjacent network devices 20 can also communicate via wired or wireless means. Terminal device 10 can switch between different network devices 20, that is, establish connections with different network devices 20.

[0034] The "5G NR system" in the embodiments of this disclosure may also be referred to as a 5G system or an NR system, but those skilled in the art will understand the meaning. The technical solutions described in the embodiments of this disclosure are applicable to the 5G NR system and to subsequent evolution systems of the 5G NR system.

[0035] In new radio (NR) technology, especially when the communication frequency band is in frequency range 2, beam-based transmission and reception are required to ensure coverage due to the rapid attenuation of high-frequency channels.

[0036] In Rel-16, the TCI state of any one or a combination of the PDCCH, PDSCH, PUSCH, PUCCH, and reference signals is independently indicated. These reference signals include the Channel State Information Reference Signal (CSI-RS), Sounding Reference Signal (SRS), Positioning Reference Signal (PRS), and Tracking Reference Signal (TRS). CSI-RSs include those used for channel state information measurement, beamforming measurement, or path loss estimation. They also include periodically transmitted, semi-persistently transmitted, and aperiodically transmitted CSI-RSs. SRSs include those used for codebook-based or non-codebook channel state information measurement, beamforming measurement, or positioning measurement. They also include periodically transmitted, semi-persistently transmitted, and aperiodically transmitted SRSs. Furthermore, PDCCH and PUCCH use MAC Control Element (MAC CE) to activate a TCI state, while PDSCH and PUSCH use DCI signaling to indicate their respective TCI states.

[0037] Currently, in order to reduce signaling overhead, it is hoped to use a unified / universal TCI state. If the base station indicates a unified TCI state for downlink, then the TCI state can be used for the terminal's PDSCH and at least a portion of the PDCCH (such as the terminal-specific PDCCH (User Equipment dedicated PDCCH)) and some downlink reference signals; if the base station indicates a unified TCI state for uplink, then the TCI state can be used for the terminal's PUSCH and at least a portion of the PUCCH and some uplink reference signals. The unified TCI state may currently be indicated separately by a separate uplink TCI state (Separate Up Link TCI State) and a separate downlink TCI state (Separate Down Link TCI State), or jointly by an uplink and downlink TCI state (Joint TCI State). Among them, Separate UL TCI State applies to uplink channels and / or signals, Separate DL TCI State applies to downlink channels and / or signals, and Joint TCI State applies to both uplink and downlink channels and / or signals.

[0038] At this stage, it has been agreed to use DCI to indicate the unified TCI state, and whether the unified TCI state information is correctly received needs to be determined by the HARQ-ACK information corresponding to the DCI in the HARQ-ACK codebook. At present, a HARQ-ACK codebook can contain HARQ-ACK information corresponding to the DCI of multiple carriers (Component Carrier, CC), that is, multiple time slots (slots) on the serving cell (ServingCell). The HARQ-ACK information corresponding to the DCI of each slot on each CC uses its own independent bit. When multiple DCIs corresponding to the HARQ-ACK information contained in a HARQ-ACK codebook contain TCI state indications, the terminal uses the HARQ-ACK information of which DCI to determine which TCI state in which DCI to use, which is a problem that needs to be solved.

[0039] Based on this, the present disclosure provides a method for determining a transmission configuration indication. This method provides a solution for a terminal to determine a unified transmission configuration indication for communication transmission when multiple DCI corresponding to HARQ-ACK information bits contained in a HARQ-ACK codebook all include TCI status indications. The following describes the technical solution provided by this application through several embodiments.

[0040] Please refer to Figure 2 , which shows a flow chart of a method for determining a transmission configuration indication provided by an embodiment of the present disclosure. This method can be applied to Figure 1 The terminal device in the communication system shown in FIG.

[0041] Step 201: Receive M DCIs sent by a network device, where each of the M DCIs includes a TCI state, and the M DCIs include a reference DCI.

[0042] The above-mentioned M DCIs are used to instruct the terminal device and the network device to use a unified transmission configuration indication for communication transmission, wherein the above-mentioned M is a positive integer.

[0043] Optionally, the TCI state includes at least one of a unified TCI state, a joint TCI state, a separated uplink TCI state, and a separated downlink TCI state.

[0044] Illustratively, the M DCIs are sent by the network device in at least one time unit through resources on at least one carrier and / or bandwidth part (Bandwidth Part, BWP).

[0045] Optionally, the above-mentioned reference DCI can be specified by the network device, preset by the terminal device, or determined by the terminal device based on the HARQ-ACK codebook corresponding to the above-mentioned M DCIs. The above-mentioned HARQ-ACK codebook is generated by the terminal device after receiving the above-mentioned M DCIs based on the reception status of each of the above-mentioned M DCIs or the reception status of the PDSCH scheduled by each of the M DCIs.

[0046] Step 202: Determine a unified TCI state used for communication transmission based on a target TCI state included in a reference DCI.

[0047] Illustratively, the above reference DCI corresponds to the target TCI state.

[0048] Optionally, the above-mentioned communication transmission includes uplink transmission or downlink transmission of a communication channel, and uplink transmission or downlink transmission of a reference signal. In some embodiments, the communication transmission corresponds to the TCI state included in the DCI. When the TCI state is a unified TCI state, the communication transmission includes uplink transmission or downlink transmission of the communication channel, and uplink transmission or downlink transmission of the reference signal; when the TCI state is a joint TCI state, the communication transmission includes uplink transmission or downlink transmission of the communication channel, and uplink transmission or downlink transmission of the reference signal; when the TCI state is a separated uplink TCI state, the communication transmission is uplink transmission of the communication channel, and uplink transmission of the reference signal; when the TCI state is a separated downlink TCI state, the communication transmission is downlink transmission of the communication channel, and downlink transmission of the reference signal.

[0049] In some embodiments, when the reference DCI is determined based on the HARQ-ACK codebook corresponding to the above-mentioned M DCIs, the terminal device determines the unified transmission configuration indication used for communication transmission based on the target TCI state included in the reference DCI after the target time interval (T time) after the HARQ-ACK codebook is sent, wherein the HARQ-ACK information corresponding to the reference DCI included in the HARQ-ACK codebook is ACK, that is, the information of the unified transmission configuration indication indicated by the reference DCI is correctly received.

[0050] The target time interval may be specified by the network device, preset by the terminal device, or specified by the protocol. The target time interval may be N transmission symbols.

[0051] In summary, the transmission configuration indication determination method provided in the embodiment of the present application is such that, when a terminal device receives M DCIs sent by a network device, and each of the M DCIs includes a TCI status, the terminal device determines the unified transmission configuration indication used for communication transmission based on the TCI status included in the reference DCI in the M DCIs, where M is a positive integer. That is, the present disclosure provides a solution to the problem of how to determine the unified transmission configuration indication used for communication transmission, so that the terminal device and the network device reach a consensus on the time of TCI state adoption, ensure the consistency of the transmission configuration indication, and improve the transmission performance between the terminal device and the network device based on the transmission configuration indication.

[0052] Please refer to Figure 3 , which shows a flow chart of a method for determining a transmission configuration indication provided by an embodiment of the present disclosure. In this embodiment of the present application, the TCI states included in all the M DCIs received by the terminal device are the same, and M is a positive integer. The method includes the following steps.

[0053] Step 301: Receive M DCIs sent by a network device, where each of the M DCIs includes a TCI status.

[0054] The above-mentioned M DCIs are used to instruct the terminal device and the network device to use a unified transmission configuration indication for communication transmission, wherein the above-mentioned M is a positive integer.

[0055] Optionally, the TCI state includes at least one of a unified TCI state, a joint TCI state, a separated uplink TCI state, and a separated downlink TCI state.

[0056] Illustratively, the M signals are sent by a network device over at least one time unit using resources on at least one carrier and / or bandwidth portion, where a time unit includes a time slot or X symbols, where X symbols is less than one time slot, i.e., X is less than 14 or 12.

[0057] Step 302: Send a HARQ-ACK codebook to the network device, where the HARQ-ACK codebook includes HARQ-ACK information corresponding to M DCIs.

[0058] Optionally, the HARQ-ACK codebook further includes HARQ-ACK information corresponding to K DCIs, where the K DCIs are DCIs that do not include a TCI status indication, and K is a positive integer.

[0059] Optionally, the HARQ-ACK information corresponding to the above-mentioned M DCIs may be an acknowledgment (ACK) or a negative acknowledgment (NACK). When the HARQ-ACK information is ACK, it indicates that the terminal device has correctly received the unified transmission configuration information indicated by the DCI and / or correctly received the PDSCH scheduled by the DCI; when the HARQ-ACK information is NACK, it indicates that the terminal device has not correctly received the unified transmission configuration indicated by the DCI and / or has not correctly received the PDSCH scheduled by the DCI.

[0060] Step 303: When HARQ-ACK information corresponding to at least one DCI among the M DCIs is ACK, any one DCI among the at least one DCI is determined as a reference DCI.

[0061] In the embodiment of the present application, the TCI states included in all the M DCIs are the same.

[0062] When unified transmission configuration indication information indicated by at least one DCI among the M DCIs with the same TCI status is correctly received, any one of the at least one DCI is determined as a reference DCI.

[0063] Schematically, the diagram of the HARQ-ACK codebook is shown in the first row of Table 1, where the second row in Table 1 indicates the DCI number corresponding to the HARQ-ACK information, the third row indicates the TCI state number indicated in each DCI, the fourth row indicates the carrier CC corresponding to the frequency domain resource of each DCI, and the fifth row indicates the time slot number in which each DCI is sent. The TCI state corresponding to all DCIs in Table 1 is TCI state #0, and the HARQ-ACK information corresponding to DCI #2, DCI #4, DCI #5, and DCI #6 is ACK. The reference DCI is any one of the above DCI #2, DCI #4, DCI #5, and DCI #6.

[0064] Table 1

[0065] NACK ACK NACK ACK ACK ACK DCI#1 DCI#2 DCI#3 DCI#4 DCI#5 DCI#6 TCI state#0 TCI state#0 TCI state#0 TCI state#0 TCI state#0 TCI state#0 on CC1 on CC2 on CC3 on CC1 on CC2 on CC3 slot#1 slot#1 slot#1 slot#2 slot#2 slot#2

[0066] Step 304: Determine a unified TCI state used for communication transmission based on the target TCI state included in the reference DCI.

[0067] Illustratively, the above reference DCI corresponds to the target TCI state.

[0068] Optionally, the above-mentioned communication transmission includes uplink transmission or downlink transmission of a communication channel, and uplink transmission or downlink transmission of a reference signal.

[0069] In an embodiment of the present application, after the target time interval (T time) after the HARQ-ACK codebook is sent, the terminal device determines the unified transmission configuration indication used for communication transmission based on the target TCI state included in the reference DCI, wherein the HARQ-ACK information corresponding to the reference DCI included in the HARQ-ACK codebook is ACK, that is, the unified transmission configuration indication information indicated by the reference DCI is correctly received.

[0070] The target time interval may be specified by the network device, or may be preset by the terminal device or specified by the protocol. The target time interval may be N transmission symbols.

[0071] In summary, the transmission configuration indication determination method provided in the embodiment of the present application is that when a terminal device receives M DCIs sent by a network device, and each of the M DCIs includes a TCI state, the terminal device determines the unified transmission configuration indication used for communication transmission based on the TCI state included in the reference DCI in the M DCIs, where M is a positive integer. That is, the present disclosure proposes a solution to the problem of how to determine the unified transmission configuration indication used for communication transmission when HARQ-ACK information corresponding to multiple DCIs is included in the HARQ-ACK codebook, so that the terminal device and the network device reach a consensus on the TCI state adoption time, ensure the consistency of the transmission configuration indication, and improve the transmission performance between the terminal device and the network device based on the transmission configuration indication.

[0072] In this embodiment of the present application, in the HARQ-ACK codebook, as long as there is HARQ-ACK information corresponding to a DCI that is ACK, the terminal can start using the TCI state indicated in the reference DCI to determine the unified transmission configuration indication used for communication transmission after the target time interval after the above-mentioned ACK is sent.

[0073] Please refer to Figure 4 , which shows a flow chart of a method for determining a transmission configuration indication provided by an embodiment of the present disclosure. In this embodiment of the present application, among the transmission time slots corresponding to the M DCIs received by the terminal device, the N DCIs transmitted in the last time slot contain the same TCI state, and N and M are both positive integers. The method includes the following steps.

[0074] Step 401: Receive M DCIs sent by a network device, where each of the M DCIs includes a TCI status.

[0075] The above-mentioned M DCIs are used to instruct the terminal device and the network device to use a unified transmission configuration indication for communication transmission, wherein the above-mentioned M is a positive integer.

[0076] Optionally, the TCI state includes at least one of a unified TCI state, a joint TCI state, a separated uplink TCI state, and a separated downlink TCI state.

[0077] Illustratively, the above M are sent by the network device in at least one time unit via resources on at least one carrier and / or bandwidth portion.

[0078] Step 402: Send a HARQ-ACK codebook to the network device, where the HARQ-ACK codebook includes HARQ-ACK information corresponding to M DCIs.

[0079] Optionally, the HARQ-ACK codebook further includes HARQ-ACK information corresponding to K DCIs, where the K DCIs are DCIs that do not include a TCI status indication, and K is a positive integer.

[0080] Optionally, the above-mentioned HARQ-ACK information can be an acknowledgment (ACK) or a negative acknowledgment (NACK).

[0081] Step 403: Determine N DCIs to be sent in the last time slot according to the sending time slots corresponding to the M DCIs.

[0082] The terminal device obtains the transmission time slots corresponding to the M DCIs, and determines the N DCIs transmitted in the last time slot, wherein the TCI states included in the N DCIs are all the same, and N is a positive integer.

[0083] In the embodiments of the present application, only the last time slot is taken as an example for illustration. In some embodiments, the above-mentioned last time slot can also be replaced by the first time slot or any specified time slot among all time slots, which is not limited here.

[0084] Step 404: When HARQ-ACK information corresponding to at least one DCI among the N DCIs is ACK, any one DCI among the at least one DCI is determined as a reference DCI.

[0085] In the embodiment of the present application, the above-mentioned M DCIs each correspond to a transmission time slot, one DCI corresponds to only one time slot, and one time slot can be used to send multiple DCIs.

[0086] In the embodiment of the present application, in the transmission time slots corresponding to the above-mentioned M DCIs, the TCI states included in the N DCIs sent in the last time slot are the same.

[0087] When the HARQ-ACK information corresponding to at least one DCI among the N DCIs sent in the last time slot is ACK, any one DCI among the at least one DCI is determined as a reference DCI.

[0088] Schematically, the diagram of the HARQ-ACK codebook is shown in the first row of Table 2, where the second row in Table 1 indicates the DCI number corresponding to the HARQ-ACK information, the third row indicates the TCI state number indicated in each DCI, the fourth row indicates the carrier CC corresponding to the frequency domain resource of each DCI, and the fifth row indicates the time slot number in which each DCI is sent. In Table 2, the TCI state of DCI#4, DCI#5, and DCI#6 sent in the last time slot slot#2 is TCI state#0, and the HARQ-ACK information corresponding to DCI#4 and DCI#6 is ACK, then either DCI#4 or DCI#6 is determined as the reference DCI.

[0089] Table 2

[0090] NACK ACK NACK ACK NACK ACK DCI#1 DCI#2 DCI#3 DCI#4 DCI#5 DCI#6 TCI state#1 TCI state#2 TCI state #3 TCI state#0 TCI state#0 TCI state#0 on CC1 on CC2 on CC3 on CC1 on CC2 on CC3 slot#1 slot#1 slot#1 slot#2 slot#2 slot#2

[0091] In some embodiments, when the HARQ-ACK information of at least one DCI among the N DCIs is ACK, the at least one DCI is determined as a reference DCI.

[0092] Step 405: Determine a unified TCI state used for communication transmission based on the target TCI state included in the reference DCI.

[0093] Optionally, the above-mentioned communication transmission includes uplink transmission or downlink transmission of a communication channel, and uplink transmission or downlink transmission of a reference signal.

[0094] In an embodiment of the present application, after the target time interval (T time) after the HARQ-ACK codebook is sent, the terminal device determines the unified transmission configuration indication used for communication transmission based on the target TCI state included in the reference DCI, wherein the HARQ-ACK information corresponding to the reference DCI included in the HARQ-ACK codebook is ACK, that is, the unified transmission configuration indication information indicated by the reference DCI is correctly received.

[0095] The target time interval may be specified by the network device, or may be preset by the terminal device or specified by the protocol. The target time interval may be N transmission symbols.

[0096] In summary, the transmission configuration indication determination method provided in the embodiment of the present application is that when a terminal device receives M DCIs sent by a network device, and each of the M DCIs includes a TCI state, the terminal device determines the unified transmission configuration indication used for communication transmission based on the TCI state included in the reference DCI in the M DCIs, where M is a positive integer. That is, the present disclosure proposes a solution to the problem of how to determine the unified transmission configuration indication used for communication transmission when HARQ-ACK information corresponding to multiple DCIs is included in the HARQ-ACK codebook, so that the terminal device and the network device reach a consensus on the TCI state adoption time, ensure the consistency of the transmission configuration indication, and improve the transmission performance between the terminal device and the network device based on the transmission configuration indication.

[0097] In this embodiment of the present application, in the HARQ-ACK codebook, as long as there is HARQ-ACK information corresponding to a DCI in the DCI sent in the last time slot as ACK, the terminal can start using the TCI state indicated in the reference DCI to determine the general beam used for communication transmission after the target time interval after the above ACK is sent.

[0098] Please refer to Figure 5 , which shows a flow chart of a method for determining a transmission configuration indication provided by an embodiment of the present disclosure. In this embodiment of the present application, the TCI states contained in the L DCIs with the latest transmission start symbols corresponding to the M DCIs received by the terminal device are the same, and L and M are both positive integers. The method includes the following steps.

[0099] Step 501: Receive M DCIs sent by a network device, where each of the M DCIs includes a TCI status.

[0100] The above-mentioned M DCIs are used to instruct the terminal device and the network device to use a unified transmission configuration indication for communication transmission, wherein the above-mentioned M is a positive integer.

[0101] Optionally, the TCI state includes at least one of a unified TCI state, a joint TCI state, a separated uplink TCI state, and a separated downlink TCI state.

[0102] Illustratively, the above M are sent by the network device in at least one time unit via resources on at least one carrier and / or bandwidth portion.

[0103] Step 502: Send a HARQ-ACK codebook to the network device, where the HARQ-ACK codebook includes HARQ-ACK information corresponding to M DCIs.

[0104] Optionally, the HARQ-ACK codebook further includes HARQ-ACK information corresponding to K DCIs, where the K DCIs are DCIs that do not include a TCI status indication, and K is a positive integer.

[0105] Optionally, the above-mentioned HARQ-ACK information can be an acknowledgment (ACK) or a negative acknowledgment (NACK).

[0106] Step 503: Determine the L DCIs with the latest transmission start symbols according to the transmission start symbols corresponding to the M DCIs.

[0107] The terminal device determines the transmission start symbols corresponding to the M DCIs, and determines the L DCIs with the latest transmission start symbols, wherein the TCI states included in the L DCIs are all the same, and L is a positive integer.

[0108] Optionally, the above-mentioned DCI with the latest sending start symbol can be the DCI with the latest sending start symbol in the first time slot for sending DCI, or the DCI with the latest sending start symbol in the last time slot among the time slots for sending DCI, or the DCI with the latest sending start symbol in any specified time slot among the time slots for sending DCI, which is not limited here.

[0109] In the embodiments of the present application, only the latest DCI sending the start symbol is used as an example for illustration. In some embodiments, the DCI sending the start symbol latest can be replaced by the DCI sending the start symbol earliest, which is not limited here.

[0110] Step 504: When HARQ-ACK information corresponding to at least one DCI among the L DCIs is ACK, any one DCI among the at least one DCI is determined as a reference DCI.

[0111] In the embodiment of the present application, the M DCIs each correspond to a transmission time slot, one DCI corresponds to only one time slot, and one time slot can be used to transmit multiple DCIs. The DCIs transmitted in the same time slot may also correspond to different transmission start symbols.

[0112] In the embodiment of the present application, the TCI states of the L DCIs with the latest transmission start symbols corresponding to the M DCIs are the same, wherein the L DCIs are the L DCIs with the latest transmission start symbols among the DCIs in the last transmission time slot among the M DCIs.

[0113] When the HARQ-ACK information corresponding to at least one DCI among the L DCIs with the latest sending start symbols is ACK, any one DCI among the at least one DCI is determined as a reference DCI.

[0114] Schematically, the diagram of the HARQ-ACK codebook is shown in the first row of Table 3, where the second row in Table 1 represents the DCI number corresponding to the HARQ-ACK information, the third row represents the TCI state number indicated in each DCI, the fourth row indicates the carrier CC corresponding to the frequency domain resource of each DCI, and the fifth row represents the time slot number in which each DCI is sent. Time slot slot#2 in Table 3 is the latest time slot, where the latest starting symbol of the DCI is symbol#7, and its corresponding DCI includes DCI#5 and DCI#6. Wherein, the HARQ-ACK information corresponding to DCI#6 is ACK, and DCI#6 is determined as the reference DCI.

[0115] Table 3

[0116]

[0117] In some embodiments, when the HARQ-ACK information of at least one DCI among the L DCIs is ACK, any one of the at least one DCI is determined as a reference DCI.

[0118] Step 505: Determine a unified TCI state used for communication transmission based on the target TCI state included in the reference DCI.

[0119] Optionally, the above-mentioned communication transmission includes uplink transmission or downlink transmission of a communication channel, and uplink transmission or downlink transmission of a signal.

[0120] In an embodiment of the present application, after the target time interval (T time) after the HARQ-ACK codebook is sent, the terminal device determines the unified transmission configuration indication used for communication transmission based on the target TCI state included in the reference DCI, wherein the HARQ-ACK information corresponding to the reference DCI included in the HARQ-ACK codebook is ACK, that is, the unified transmission configuration indication information indicated by the reference DCI is correctly received.

[0121] The target time interval may be specified by the network device, or may be preset by the terminal device or specified by the protocol. The target time interval may be N transmission symbols.

[0122] In summary, the transmission configuration indication determination method provided in the embodiment of the present application is that when a terminal device receives M DCIs sent by a network device, and each of the M DCIs includes a TCI state, the terminal device determines the unified transmission configuration indication used for communication transmission based on the TCI state included in the reference DCI in the M DCIs, where M is a positive integer. That is, the present disclosure proposes a solution to the problem of how to determine the unified transmission configuration indication used for communication transmission when HARQ-ACK information corresponding to multiple DCIs is included in the HARQ-ACK codebook, so that the terminal device and the network device reach a consensus on the TCI state adoption time, ensure the consistency of the transmission configuration indication, and improve the transmission performance between the terminal device and the network device based on the transmission configuration indication.

[0123] In an embodiment of the present application, in the HARQ-ACK codebook, as long as the HARQ-ACK information corresponding to one DCI in the DCI with the latest starting symbol is ACK, the terminal can start using the TCI state indicated in the reference DCI to determine the unified transmission configuration indication used for communication transmission after the target time interval after the above-mentioned ACK is sent.

[0124] Please refer to Figure 6 , which shows a flow chart of a method for determining a transmission configuration indication provided by an embodiment of the present disclosure. In this embodiment of the present application, the TCI states contained in the J DCIs with the latest transmission end symbols corresponding to the M DCIs received by the terminal device are the same, and J and M are both positive integers. The method includes the following steps.

[0125] Step 601: Receive M DCIs sent by a network device, where each of the M DCIs includes a TCI status.

[0126] The above-mentioned M DCIs are used to instruct the terminal device and the network device to use a unified transmission configuration indication for communication transmission, wherein the above-mentioned M is a positive integer.

[0127] Optionally, the TCI state includes at least one of a unified TCI state, a joint TCI state, a separated uplink TCI state, and a separated downlink TCI state.

[0128] Illustratively, the above M are sent by the network device in at least one time unit via resources on at least one carrier and / or bandwidth portion.

[0129] Step 602: Send a HARQ-ACK codebook to the network device, where the HARQ-ACK codebook includes HARQ-ACK information corresponding to M DCIs.

[0130] Optionally, the HARQ-ACK codebook further includes HARQ-ACK information corresponding to K DCIs, where the K DCIs are DCIs that do not include a TCI status indication, and K is a positive integer.

[0131] Optionally, the above-mentioned HARQ-ACK information can be an acknowledgment (ACK) or a negative acknowledgment (NACK).

[0132] Step 603: Determine J DCIs with the latest transmission end symbols according to the transmission end symbols corresponding to the M DCIs.

[0133] The terminal device obtains the transmission end symbols corresponding to the M DCIs, and determines the J DCIs with the latest transmission end symbols, wherein the TCI states included in the J DCIs are all the same, and J is a positive integer.

[0134] Optionally, the above-mentioned DCI with the latest sent end symbol can be the DCI with the latest sent end symbol in the first time slot for sending DCI, or the DCI with the latest sent end symbol in the last time slot for sending DCI, or the DCI with the latest sent end symbol in any specified time slot among the time slots for sending DCI.

[0135] In the embodiments of the present application, only the latest DCI sending the end symbol is used as an example for illustration. In some embodiments, the DCI sending the end symbol the latest can be replaced by the DCI sending the end symbol the earliest, which is not limited here.

[0136] Step 604: When the HARQ-ACK information corresponding to at least one DCI among the J DCIs is ACK, any one DCI among the at least one DCI is determined as a reference DCI.

[0137] In the embodiment of the present application, each of the M DCIs corresponds to a transmission time slot, one DCI corresponds to only one time slot, and one time slot can be used to transmit multiple DCIs. The multiple DCIs transmitted in the same time slot may also correspond to different transmission end symbols.

[0138] In the embodiment of the present application, the TCI states of the J DCIs with the latest transmission end symbols corresponding to the M DCIs are the same, wherein the J DCIs are the J DCIs with the latest transmission end symbols among the DCIs in the last transmission slot among the M DCIs.

[0139] When the HARQ-ACK information corresponding to at least one DCI among the J DCIs with the latest sending end symbols is ACK, any one DCI among the at least one DCI is determined as a reference DCI.

[0140] Schematically, the diagram of the HARQ-ACK codebook is shown in the first row of Table 4, where the second row in Table 4 indicates the DCI number corresponding to the HARQ-ACK information, the third row indicates the TCI state number indicated in each DCI, the fourth row indicates the carrier CC corresponding to the frequency domain resource of each DCI, and the fifth row indicates the time slot number in which each DCI is sent. Time slot slot #2 in Table 4 is the latest time slot, where the latest end symbol is symbol #9, and its corresponding DCI includes DCI #5 and DCI #6. Wherein, the HARQ-ACK information corresponding to DCI #6 is ACK, and DCI #6 is determined as the reference DCI.

[0141] Table 4

[0142]

[0143] In some embodiments, when the HARQ-ACK information of at least one DCI among the J DCIs is ACK, any one of the at least one DCI is determined as a reference DCI.

[0144] Step 605: Determine a unified TCI state used for communication transmission based on the target TCI state included in the reference DCI.

[0145] Optionally, the above-mentioned communication transmission includes uplink transmission or downlink transmission of a communication channel, and uplink transmission or downlink transmission of a reference signal.

[0146] In an embodiment of the present application, after the target time interval (T time) after the HARQ-ACK codebook is sent, the terminal device determines the unified transmission configuration indication used for communication transmission based on the target TCI state included in the reference DCI, wherein the HARQ-ACK information corresponding to the reference DCI included in the HARQ-ACK codebook is ACK, that is, the unified transmission configuration indication information indicated by the reference DCI is correctly received.

[0147] The target time interval may be specified by the network device, or may be preset by the terminal device or specified by the protocol. The target time interval may be N transmission symbols.

[0148] In summary, the transmission configuration indication determination method provided in the embodiment of the present application is that when a terminal device receives M DCIs sent by a network device, and each of the M DCIs includes a TCI state, the terminal device determines the unified transmission configuration indication used for communication transmission based on the TCI state included in the reference DCI in the M DCIs, where M is a positive integer. That is, the present disclosure proposes a solution to the problem of how to determine the unified transmission configuration indication used for communication transmission when HARQ-ACK information corresponding to multiple DCIs is included in the HARQ-ACK codebook, so that the terminal device and the network device reach a consensus on the TCI state adoption time, ensure the consistency of the transmission configuration indication, and improve the transmission performance between the terminal device and the network device based on the transmission configuration indication.

[0149] In an embodiment of the present application, in the HARQ-ACK codebook, as long as the HARQ-ACK information corresponding to one of the DCIs in the DCI sent latest by the end symbol is ACK, the terminal can start using the TCI state indicated in the reference DCI to determine the unified transmission configuration indication used for communication transmission after the target time interval after the above-mentioned ACK is sent.

[0150] Please refer to Figure 7 , which shows a flow chart of a method for determining a transmission configuration indication provided by an embodiment of the present disclosure. The method includes the following steps.

[0151] Step 701: Receive M DCIs sent by a network device, where each of the M DCIs includes a TCI status.

[0152] The above-mentioned M DCIs are used to instruct the terminal device and the network device to use a unified transmission configuration indication for communication transmission, wherein the above-mentioned M is a positive integer.

[0153] Optionally, the TCI state includes at least one of a unified TCI state, a joint TCI state, a separated uplink TCI state, and a separated downlink TCI state.

[0154] Illustratively, the above M are sent by the network device in at least one time unit via resources on at least one carrier and / or bandwidth portion.

[0155] Step 702: Send a HARQ-ACK codebook to the network device, where the HARQ-ACK codebook includes HARQ-ACK information corresponding to M DCIs.

[0156] Optionally, the HARQ-ACK codebook further includes HARQ-ACK information corresponding to K DCIs, where the K DCIs are DCIs that do not include a TCI status indication, and K is a positive integer.

[0157] Optionally, the above-mentioned HARQ-ACK information can be an acknowledgment (ACK) or a negative acknowledgment (NACK).

[0158] Step 703 : Determine a reference DCI according to at least one of the carrier number, bandwidth part number, transmission start time, and transmission end time corresponding to each of the M DCIs.

[0159] Optionally, determining the reference DCI includes at least one of the following methods:

[0160] (1) The DCI with the smallest corresponding carrier number among the M DCIs is determined as the reference DCI.

[0161] (2) The DCI with the smallest corresponding bandwidth part number among the M DCIs is determined as the reference DCI.

[0162] (3) Determine the DCI with the latest corresponding transmission start time among the M DCIs as the reference DCI.

[0163] In some embodiments, the M DCIs respectively correspond to a sending start time, and the sending start time indicates the starting time slot or starting symbol when the network device sends the DCI to the terminal device.

[0164] (4) Determine the DCI with the latest corresponding transmission end time among the M DCIs as the reference DCI.

[0165] In some embodiments, the M DCIs respectively correspond to a sending end time, and the sending end time indicates the end slot or end symbol when the network device sends the DCI to the terminal device.

[0166] (5) Determine the DCI with the earliest corresponding transmission start time among the M DCIs as the reference DCI.

[0167] In some embodiments, the M DCIs respectively correspond to a sending start time, and the sending start time indicates the starting time slot or starting symbol when the network device sends the DCI to the terminal device.

[0168] (6) Determine the DCI with the earliest corresponding transmission end time among the M DCIs as the reference DCI.

[0169] In some embodiments, the M DCIs respectively correspond to a sending end time, and the sending end time indicates the end slot or end symbol when the network device sends the DCI to the terminal device.

[0170] Illustratively, the reference DCI may be determined based on one of the above-mentioned carrier number, bandwidth part number, transmission start time and transmission end time, or may be determined based on a combination of multiple items, which is not limited here.

[0171] When the reference DCI is determined according to the above multiple combinations, multiple candidate DCIs may be determined according to each item, and then the reference DCI may be determined from the multiple candidate DCIs according to the multiple items.

[0172] For example, taking the combination of the first and fourth items above as an example, at least one DCI with the smallest corresponding carrier number among the M DCIs is determined as the first candidate DCI, at least one DCI with the latest corresponding sending end time among the M DCIs is determined as the fourth candidate DCI, and a DCI that is both the first candidate DCI and the second candidate DCI is determined as the reference DCI.

[0173] For another example, each item in the above combination corresponds to a different weight, and the reference DCI is determined from the candidate DCI based on the above weight. Taking the above four-item combination as an example, the weight relationship of the four items is the weight of the carrier number > the weight of the bandwidth part > the weight of the sending start time > the weight of the sending end time. Then, at least one first candidate DCI is determined based on the carrier number. When there are multiple first candidate DCIs, at least one second candidate DCI is selected from the first candidate DCI based on the number of the bandwidth part, and so on, until only one candidate DCI remains, and the last remaining candidate DCI is determined as the reference DCI.

[0174] Step 704: When the HARQ-ACK information corresponding to the reference DCI is ACK, determine the unified TCI state used for communication transmission based on the target TCI state included in the reference DCI.

[0175] Optionally, the above-mentioned communication transmission includes uplink transmission or downlink transmission of a communication channel, and uplink transmission or downlink transmission of a reference signal.

[0176] In an embodiment of the present application, after the target time interval (T time) after the HARQ-ACK codebook is sent, the terminal device determines the unified transmission configuration indication used for communication transmission based on the target TCI state included in the reference DCI, wherein the HARQ-ACK information corresponding to the reference DCI included in the HARQ-ACK codebook is ACK, that is, the unified transmission configuration indication information indicated by the reference DCI is correctly received.

[0177] The target time interval may be specified by the network device, or may be preset by the terminal device or specified by the protocol. The target time interval may be N transmission symbols.

[0178] In some embodiments, when the HARQ-ACK information corresponding to the determined reference DCI is NACK, the terminal device re-determines the reference DCI, or the terminal device re-receives the DCI sent by the network device to determine the unified transmission configuration indication used for communication transmission.

[0179] In summary, the transmission configuration indication determination method provided in the embodiment of the present application is that when a terminal device receives M DCIs sent by a network device, and each of the M DCIs includes a TCI state, the terminal device determines the unified transmission configuration indication used for communication transmission based on the TCI state included in the reference DCI in the M DCIs, where M is a positive integer. That is, the present disclosure proposes a solution to the problem of how to determine the unified transmission configuration indication used for communication transmission when HARQ-ACK information corresponding to multiple DCIs is included in the HARQ-ACK codebook, so that the terminal device and the network device reach a consensus on the TCI state adoption time, ensure the consistency of the transmission configuration indication, and improve the transmission performance between the terminal device and the network device based on the transmission configuration indication.

[0180] Figure 8 FIG. 1 is a structural block diagram of a transmission configuration indication determining apparatus provided by an exemplary embodiment of the present disclosure. Figure 8 As shown, taking the device used in a terminal as an example, the above-mentioned device 800 includes: a receiving module 810 and a determining module 820.

[0181] A receiving module 810 is configured to receive M downlink control information DCIs sent by a network device, where each of the M DCIs includes a transmission configuration indicator (TCI) state, and the M DCIs include a reference DCI, where M is a positive integer;

[0182] The determination module 820 is configured to determine a unified TCI state used for communication transmission based on a target TCI state included in the reference DCI.

[0183] In one example, if Figure 9 As shown, the device 800 further includes:

[0184] The sending module 830 is configured to send a hybrid automatic repeat request HARQ response ACK codebook to the network device, where the HARQ-ACK codebook includes HARQ-ACK information corresponding to the M DCIs.

[0185] In one example, the TCI states included in all the M DCIs are the same.

[0186] In one example, the determining module 820 is further configured to, when HARQ-ACK information corresponding to at least one DCI among the M DCIs is ACK, determine any one DCI among the at least one DCI as the reference DCI;

[0187] The determining module 820 is further configured to determine a unified TCI state used for communication transmission based on the target TCI state included in the reference DCI.

[0188] In an example, in the transmission time slots corresponding to the M DCIs, the TCI states included in the N DCIs transmitted in the last time slot are the same, and N is a positive integer.

[0189] In one example, the determining module 820 is further configured to, when HARQ-ACK information corresponding to at least one DCI among the N DCIs is ACK, determine any one DCI among the at least one DCI as the reference DCI;

[0190] The determining module 820 is further configured to determine a unified TCI state used for communication transmission based on the target TCI state included in the reference DCI.

[0191] In an example, the TCI states included in the latest L DCIs whose sending start symbols correspond to the M DCIs are the same, and L is a positive integer.

[0192] In one example, the determining module 820 is further configured to, when HARQ-ACK information corresponding to at least one DCI in the L DCIs is ACK, determine any one DCI in the at least one DCI as the reference DCI;

[0193] The determining module 820 is further configured to determine a unified TCI state used for communication transmission based on the target TCI state included in the reference DCI.

[0194] In an example, the TCI states included in the latest J DCIs whose transmission end symbols correspond to the M DCIs are the same, and J is a positive integer.

[0195] In one example, the determining module 820 is further configured to, when HARQ-ACK information corresponding to at least one DCI among the J DCIs is ACK, determine any one DCI among the at least one DCI as the reference DCI;

[0196] The determining module 820 is further configured to determine a unified TCI state used for communication transmission based on the target TCI state included in the reference DCI.

[0197] In an example, the determination module 820 is further configured to determine the reference DCI according to at least one of the carrier number, bandwidth part number, transmission start time, and transmission end time corresponding to the M DCIs.

[0198] In one example, the determination module 820 is further used to determine the DCI with the smallest corresponding carrier number among the M DCIs as the reference DCI; and / or, determine the DCI with the smallest corresponding bandwidth part number among the M DCIs as the reference DCI; and / or, determine the DCI with the latest corresponding sending start time among the M DCIs as the reference DCI; and / or, determine the DCI with the latest corresponding sending end time among the M DCIs as the reference DCI; and / or, determine the DCI with the earliest corresponding sending start time among the M DCIs as the reference DCI; and / or, determine the DCI with the earliest corresponding sending end time among the M DCIs as the reference DCI.

[0199] In one example, the determination module 820 is further configured to determine the unified TCI state used for communication transmission based on the target TCI state included in the reference DCI when the HARQ-ACK information corresponding to the reference DCI is ACK.

[0200] In one example, the determination module 820 is further configured to determine, after a target time interval after the HARQ-ACK codebook is sent, a unified TCI state used for communication transmission based on the target TCI state included in the reference DCI, wherein the HARQ-ACK information corresponding to the reference DCI included in the HARQ-ACK codebook is ACK.

[0201] In an example, the TCI state includes at least one of a unified TCI state, a joint TCI state, a separate uplink TCI state, and a separate downlink TCI state.

[0202] Figure 10 A schematic structural diagram of a communication device 1000 (which may be implemented as the above-mentioned terminal device) provided by an exemplary embodiment of the present disclosure is shown. The communication device 1000 includes: a processor 1010, a receiver 1020, a transmitter 1030, a memory 1040 and a bus 1050.

[0203] The processor 1010 includes one or more processing cores. The processor 1010 executes various functional applications and information processing by running software programs and modules.

[0204] The receiver 1020 and the transmitter 1030 may be implemented as a communication component, which may be a communication chip.

[0205] The memory 1040 is connected to the processor 1010 via a bus 1050 .

[0206] The memory 1040 may be used to store at least one instruction, and the processor 1010 may be used to execute the at least one instruction to implement the various steps performed by the terminal in the above method embodiment, or to implement the various steps performed by the network device in the above method embodiment.

[0207] In addition, the memory 1040 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. Volatile or non-volatile storage devices include but are not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static random access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, and programmable read-only memory (PROM).

[0208] An exemplary embodiment of the present disclosure further provides a transmission configuration indication determination system, the system comprising: a terminal; the terminal comprising Figure 8 、 Figure 9 The illustrated embodiment provides a transmission configuration indication determining device.

[0209] An exemplary embodiment of the present disclosure also provides a computer-readable storage medium, which stores at least one instruction, at least one program, code set or instruction set. The at least one instruction, the at least one program, the code set or instruction set is loaded and executed by the processor to implement the steps performed by the terminal in the transmission configuration indication determination method provided in the above-mentioned method embodiments.

[0210] It should be understood that the term "plurality" used herein refers to two or more. "And / or" describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates an "or" relationship between the associated objects.

[0211] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0212] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A method for determining a transmission configuration indication, characterized in that: Applied to a terminal device, the method includes: Receive M downlink control information DCIs sent by a network device, where each of the M DCIs includes a transmission configuration indicator (TCI) state, and the M DCIs include a reference DCI, where the reference DCI is the DCI with the latest transmission start time or the latest transmission end time among the M DCIs, where M is a positive integer; Sending a hybrid automatic repeat request HARQ-acknowledgement ACK codebook to the network device, where the HARQ-ACK codebook includes HARQ-ACK information corresponding to the M DCIs respectively; A unified TCI state used for communication transmission is determined based on the target TCI state included in the reference DCI.

2. The method according to claim 1, characterized in that The TCI status included in all the M DCIs is the same.

3. The method according to claim 1, characterized in that In the transmission time slots corresponding to the M DCIs, the TCI states included in the N DCIs transmitted in the last time slot are the same, where N is a positive integer.

4. The method according to claim 1, wherein The TCI states included in the latest L DCIs whose sending start symbols correspond to the M DCIs are the same, where L is a positive integer.

5. The method according to claim 1, wherein The TCI states included in the latest J DCIs whose transmission end symbols correspond to the M DCIs are the same, where J is a positive integer.

6. The method according to any one of claims 1 to 5, characterized in that: The determining, based on the target TCI state included in the reference DCI, a unified TCI state used for communication transmission, includes: After a target time interval after sending the HARQ-ACK codebook, determining a unified TCI state used for communication transmission based on the target TCI state included in the reference DCI, wherein the HARQ-ACK information corresponding to the reference DCI included in the HARQ-ACK codebook is ACK.

7. The method according to any one of claims 1 to 5, characterized in that: The TCI state includes at least one of a unified TCI state, a joint TCI state, a separate uplink TCI state, and a separate downlink TCI state.

8. A transmission configuration indication determining device, characterized in that: The device comprises: a receiving module, configured to receive M downlink control information DCIs sent by a network device, wherein each of the M DCIs includes a transmission configuration indication (TCI) state, and the M DCIs include a reference DCI, which is the DCI with the latest transmission start time or the latest transmission end time among the M DCIs, where M is a positive integer; a sending module, configured to send a hybrid automatic repeat request HARQ-acknowledgement ACK codebook to the network device, where the HARQ-ACK codebook includes HARQ-ACK information corresponding to the M DCIs respectively; The determination module is configured to determine a unified TCI state used for communication transmission based on a target TCI state included in the reference DCI.

9. A terminal, characterized in that: The terminal includes: processor; a transceiver connected to the processor; The processor is configured to load and execute executable instructions to implement the transmission configuration indication determination method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores at least one program, and the at least one program is loaded and executed by the processor to implement the transmission configuration indication determination method according to any one of claims 1 to 7.

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