Indicating Method, Device, Equipment and Medium for TCI State

Abstract

This application discloses a method, apparatus, device, and medium for indicating a TCI status for a transmission configuration indicator, belonging to the field of communications technology. The method comprises: receiving configuration information for configuring a first channel for transmission based on N sets of TCI states, and configuring a second channel for transmission based on one set of TCI states, where N is an integer greater than 1. The method indicates the TCI status of a terminal and improves the signal quality of M-TRP transmissions based on the TCI status.

Description

Technical Field

[0001] The present application relates to the field of communication technologies, and in particular to a method, apparatus, device, and medium for indicating a Transmission Configuration Indication (TCI) status. Background Art

[0002] In the field of communications technology, the use of a unified Transmission Configuration Indicator (TCI) state has been introduced to reduce signaling overhead. For example, if a base station indicates a unified TCI state for downlink, this TCI state can apply to 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 a base station indicates a unified TCI state for uplink, this TCI state can apply to 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, a unified TCI state can be indicated separately for uplink and downlink, or jointly for uplink and downlink. That is, if a base station indicates a TCI state for downlink, this TCI state can apply to the terminal's PDSCH, a portion of the PDCCH, and a portion of the CSI-RS. If a base station indicates a TCI state for uplink, this TCI state can apply to the terminal's PUSCH, a portion of the PUCCH, and a portion of the Sounding Reference Signal (SRS). If a base station indicates a joint TCI state, this joint TCI state can apply to both uplink and downlink channels / reference signals.

[0004] However, the related technology is only applicable to the case of a single transmission reception point (S-TRP), and does not consider the case of multiple transmission reception points (M-TRP). Summary of the Invention

[0005] Embodiments of the present application provide a method, apparatus, terminal, and medium for indicating TCI status. These methods can indicate TCI status when some channels are configured to transmit based on multiple TCI statuses, while others are configured to transmit based on a single TCI status, thereby improving transmission signal quality. The technical solution is as follows:

[0006] According to one aspect of the present application, a method for indicating a transmission configuration indication (TCI) state is provided. The method is performed by a terminal, and the method includes:

[0007] Configuration information is received, where the configuration information is used to configure a first channel for transmission based on N sets of TCI states and to configure a second channel for transmission based on one set of TCI states, where N is an integer greater than 1.

[0008] According to another aspect of the present application, a method for indicating a TCI status is provided. The method is performed by an access network device, and the method includes:

[0009] Configuration information is sent to the terminal, where the configuration information is used to configure the first channel for transmission based on N sets of TCI states and to configure the second channel for transmission based on one set of TCI states, where N is an integer greater than 1.

[0010] According to another aspect of the present application, a device for indicating a TCI status is provided, the device comprising:

[0011] The first receiving module is used to receive configuration information, where the configuration information is used to configure the first channel for transmission based on N sets of TCI states and to configure the second channel for transmission based on one set of TCI states, where N is an integer greater than 1.

[0012] According to another aspect of the present application, a device for indicating a TCI status is provided, the device comprising:

[0013] The first sending module is used to send configuration information to the terminal, where the configuration information is used to configure the first channel for transmission based on N sets of TCI states and to configure the second channel for transmission based on one set of TCI states, where N is an integer greater than 1.

[0014] According to another aspect of an embodiment of the present application, a terminal is provided, the terminal including:

[0015] processor;

[0016] a transceiver connected to the processor;

[0017] a memory for storing processor-executable instructions;

[0018] The processor is configured to load and execute executable instructions to implement any of the above-mentioned TCI status indication methods.

[0019] According to another aspect of an embodiment of the present application, a chip is provided, which is used to implement any of the above-mentioned TCI status indication methods.

[0020] According to one aspect of the present application, 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 TCI status indication method as described above.

[0021] The beneficial effects of the technical solutions provided in the embodiments of the present application include at least:

[0022] When some channels are configured to transmit based on multiple sets of TCI states and other channels are configured to transmit based on one set of TCI states, the TCI state of the terminal is indicated to improve the signal quality of M-TRP transmission based on the TCI state. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0024] Figure 1 is a schematic diagram of a communication system provided according to an exemplary embodiment;

[0025] Figure 2 is a schematic diagram of a PDCCH provided according to an exemplary embodiment;

[0026] Figure 3 is a flow chart of a method for indicating a TCI status according to an exemplary embodiment;

[0027] Figure 4 is a schematic diagram of a PDCCH provided according to an exemplary embodiment;

[0028] Figure 5 is a flow chart of a method for indicating a TCI status according to an exemplary embodiment;

[0029] Figure 6 is a flow chart of a method for indicating a TCI status according to an exemplary embodiment;

[0030] Figure 7 is a flow chart of a method for indicating a TCI status according to an exemplary embodiment;

[0031] Figure 8 is a block diagram showing a device for indicating a TCI state according to an exemplary embodiment;

[0032] Figure 9 is a block diagram showing a device for indicating a TCI state according to an exemplary embodiment;

[0033] Figure 10 is a schematic structural diagram of a terminal according to an exemplary embodiment;

[0034] Figure 11 The figure is a schematic diagram showing the structure of a network device according to an exemplary embodiment. DETAILED DESCRIPTION

[0035] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all 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.

[0036] The terms used in the embodiments of the present disclosure are for the purpose of describing specific embodiments only and are not intended to limit the embodiments of the present disclosure. The singular forms "a," "an," and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0037] It should be understood that although the terms first, second, third, etc. may be used to describe various information in the embodiments of the present disclosure, 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 the embodiments of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the words "if" and "in response to" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0038] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. A person skilled in the art will appreciate that, with the evolution of the network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0039] Please refer to Figure 1 , which shows a schematic diagram of a communication system provided by an embodiment of the present application. The communication system may include: a terminal 10 and an access network device 20.

[0040] There are usually multiple terminals 10, and one or more terminals 10 can be distributed in each cell managed by the access network device 20. The terminals 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 above-mentioned devices are collectively referred to as terminals.

[0041] Access network equipment 20 is a device deployed in an access network to provide wireless communication capabilities for terminal 10. Access network equipment 20 may include various forms of macro base stations, micro base stations, relay stations, and access points. In systems employing different wireless access technologies, the names of devices that provide access network device functionality may vary. For example, in 5G NR systems, they are referred to as gNodeBs or gNBs. As communication technologies evolve, the term "access network equipment" may change. For ease of description, in the embodiments of this application, the aforementioned devices that provide wireless communication capabilities for terminal 10 are collectively referred to as access network equipment. A connection can be established between access network equipment 20 and terminal 10 over an air interface, enabling communication, including signaling and data exchange, through this connection. There may be multiple access network equipment 20, and two adjacent access network equipment 20 may communicate with each other via wired or wireless means. Terminal 10 can switch between different access network equipment 20, i.e., establish connections with different access network equipment 20.

[0042] Optionally, at least two TRPs are provided on the access network device 20. A communication connection is established between the terminal device 10 and the at least two TRPs by receiving TCI status and / or sending TCI status. Optionally, different TRPs use different receiving TCI status and / or sending TCI status. Exemplarily, the terminal device 10 determines the receiving TCI status required for receiving PDCCH based on the joint TCI status or the downlink TCI status; the terminal device 10 determines the sending TCI status required for sending PUSCH based on the joint TCI status or the uplink TCI status.

[0043] The "5G NR system" in the embodiments of the present application may also be referred to as a 5G system or an NR system, but those skilled in the art will understand its meaning. The technical solutions described in the embodiments of the present application may be applicable to the 5G NR system or to subsequent evolution systems of the 5G NR system.

[0044] 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.

[0045] For example, Figure 2 As shown, taking PDCCH as an example, PDCCH includes at least one PDCCH candidate. Here, a PDCCH candidate is used as an example. PDCCH candidates belong to a search space set (SS set, or SS set). SS set is used to describe the time domain location of PDCCH search, and SSset is associated with control resource set (CORESET). CORESET is used to describe the frequency domain characteristics of PDCCH and the number of symbols occupied in the time domain. Therefore, the above section briefly describes the association between PDCCH candidates, SS set and CORESET in PDCCH.

[0046] To reduce signaling overhead, a unified TCI state is desired. If the base station indicates a unified TCI state for downlink, the TCI state can be applied to 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, the TCI state can be applied to the terminal's PUSCH and at least a portion of the PUCCH, as well as some uplink reference signals. The unified TCI state may currently be indicated separately using a separate uplink TCI state (Separate Up Link TCI State) and a separate downlink TCI state (Separate Down Link TCI State), or jointly indicated using a joint uplink and downlink TCI state (Joint TCI State).

[0047] The separate uplink TCI state is applicable to uplink channels and / or signals, the separate downlink TCI state is applicable to downlink channels and / or signals, and the joint TCI state is applicable to both uplink and downlink channels and / or signals.

[0048] Figure 3 The flowchart of the method for indicating TCI status provided by one embodiment of the present application is shown. The method can be applied to Figure 1 The method comprises the following steps:

[0049] Step 301: Receive configuration information, where the configuration information is used to configure a first channel for transmission based on N sets of TCI states, and to configure a second channel for transmission based on one set of TCI states, where N is an integer greater than 1.

[0050] The TCI status is used to inform the terminal to use the same QCL (Quasi Co-Location) information or spatial Rx parameter when receiving PDCCH / PDSCH as the reference signal (Synchronization Signal Block (SSB) or Channel State Information Reference Signal (CSI-RS)) sent by the receiving base station; or to inform the terminal to use the same QCL information or spatial relation information or spatial filter as the reference signal (such as SRS or CSI-RS) sent when sending PUCCH / PUSCH.

[0051] The first channel includes at least one of a PDCCH, a PDSCH, a PUCCH, and a PUSCH.

[0052] The second channel includes at least one of a PDCCH, a PDSCH, a PUCCH, and a PUSCH.

[0053] The first channel and the second channel can be the same channel or different channels. For example, the first channel is the PDCCH, and the second channel is the PDSCH, PUCCH, or PUSCH. For another example, the first channel and the second channel are both PDCCHs. Alternatively, the first channel and the second channel are both PDSCHs.

[0054] Exemplarily, the first channel and the second channel are both PDCCHs, but the CORESET corresponding to the first channel and the CORESET corresponding to the second channel are different. Alternatively, the SS set corresponding to the first channel and the SS set corresponding to the second channel are different. The number of CORESETs corresponding to the first channel or the second channel may be one or more, and the number of SS sets corresponding to the first channel or the second channel may also be one or more.

[0055] Exemplarily, both the first channel and the second channel are PUSCH, the configuration of the first channel is dynamic configuration (dynamic grant), and the configuration of the second channel is static configuration 1 (configured grant Type 1, i.e., RRC configuration) or static configuration 2 (configured grant Type 2, i.e., RRC configuration + DCI indication).

[0056] Exemplarily, both the first channel and the second channel are PUCCH, the first channel is configured with multiple sets of TCI states, and the aforementioned multiple sets of TCI states correspond to the transmission of M-TRP; and the second channel is configured with one set of TCI states, and the aforementioned set of TCI states corresponds to the transmission of S-TRP.

[0057] Exemplarily, both the first channel and the second channel are PDSCHs, the DCI corresponding to the first channel belongs to the first CORESET and the first SS set, and the DCI corresponding to the second channel belongs to the second CORESET and the second SS set. The first CORESET and the second CORESET may be the same or different, and the first SS set and the second SS set may be the same or different.

[0058] The first channel is used for transmission based on N sets of TCI states in at least one transmission process. In other words, the first channel is not used for transmission based on multiple sets of TCI states every time, but only one transmission based on N sets of TCI states is sufficient.

[0059] A single set of TCI states includes a joint TCI state, which is a TCI state applicable to both uplink and downlink channel / reference signal transmission; or, a single set of TCI states includes at least one of an uplink TCI state and a downlink TCI state, where the uplink TCI state is used to indicate uplink channel / reference signal transmission, and the downlink TCI state is used to indicate downlink channel / reference signal transmission.

[0060] For example, Figure 4 As shown, taking PDCCH as an example, PDCCH includes two PDCCH candidates, namely the first PDCCH candidate and the second PDCCH candidate. The first PDCCH candidate belongs to the first SS set, which is associated with the first CORESET; the second PDCCH candidate belongs to the second SS set, which is associated with the second CORESET. The first CORESET is configured with the first TCI state, and the second CORESET is configured with the second TCI state. The first PDCCH candidate corresponds to the first TRP, and the second PDCCH candidate corresponds to the second TRP. Therefore, the access network device can configure the terminal with multiple sets of TCI states supported by the terminal for PDCCH reception.

[0061] It should be noted that the time domain resources of the first PDCCH candidate and the second PDCCH candidate are the same; or, the frequency domain resources of the first PDCCH candidate and the second PDCCH candidate are the same; or, both the time domain resources and the frequency domain resources of the first PDCCH candidate and the second PDCCH candidate are the same.

[0062] When the first channel is a PDCCH, the first channel can be configured with the following transmission methods:

[0063] (1) PDCCH repetition method: The reception of a PDCCH includes n PDCCH candidates, each of which corresponds one-to-one to n SS sets. The n SS sets are linked, where n is a positive integer greater than 1. Optionally, the n SS sets can be the same or different. Each SS set is associated with its own CORESET. Optionally, the n CORESETs can be the same or different.

[0064] (2) Single Frequency Network (SFN) method: The CORESET corresponding to the PDCCH is configured with at least two TCI states, each of which includes a joint TCI state or a downlink TCI state.

[0065] When the first channel is PUCCH, the first channel can be configured with the following transmission methods:

[0066] (1) Frequency Division Multiplexing (FDM) method: The frequency domain resources of n PUCCH opportunities used to transmit PUCCH are different, and the TCI states of the n PUCCH opportunities are different.

[0067] Optionally, the time domain resources of the n PUCCH opportunities used for transmitting the PUCCH are the same.

[0068] (2) Time Division Multiplexing (TDM) method: The time domain resources of n PUCCH opportunities used to transmit PUCCH are different, and the TCI states of the n PUCCH opportunities are different.

[0069] Optionally, frequency domain resources of the n PUCCH opportunities used for transmitting the PUCCH are the same.

[0070] (3) Space Division Multiplexing (SDM) method: A demodulation reference signal (DMRS) port used to transmit a PUCCH corresponds to at least two CDM groups, and the TCI states corresponding to the at least two CDM groups are different.

[0071] Optionally, the time domain resources and frequency domain resources of the PUCCHs corresponding to the two CDM groups used to transmit the PUCCHs are the same.

[0072] (4) SFN method: The TCI states used for PUCCH transmission include at least two TCI states, each of which includes a joint TCI state or an uplink TCI state. Optionally, the time domain resources and frequency domain resources used for PUCCH transmission are the same, and the DMRS ports used for PUCCH demodulation reference signals are the same.

[0073] When the first channel is PDSCH, the first channel can be configured with the following transmission methods:

[0074] (1) FDM method: The frequency domain resources of n PDSCH opportunities used to transmit PDSCH are different, and the TCI states of the n PDSCH opportunities are different.

[0075] Optionally, the time domain resources of the n PDSCH opportunities used for transmitting the PDSCH are the same.

[0076] (2) TDM method: The time domain resources of n PDSCH opportunities used to transmit PDSCH are different, and the TCI states of the n PDSCH opportunities are different.

[0077] Optionally, frequency domain resources of the n PDSCH opportunities used for transmitting the PDSCH are the same.

[0078] (3) SDM method: A DMRS port used to transmit PDSCH corresponds to at least two CDM groups, and the TCI states corresponding to the at least two CDM groups are different.

[0079] Optionally, the time domain resources and frequency domain resources of the PDSCHs corresponding to the two CDM groups used to transmit the PDSCHs are the same.

[0080] (4) SFN method: The TCI states used to transmit the PDSCH include at least two TCI states, each of which includes a joint TCI state or a downlink TCI state. Optionally, the time domain resources and frequency domain resources used to transmit the PDSCH are the same, and the DMRS ports used to transmit the demodulation reference signal of the PDSCH are the same.

[0081] When the first channel is PUSCH, the first channel can be configured with the following transmission methods:

[0082] (1) FDM method: The frequency domain resources of n PUSCH opportunities used to transmit PUSCH are different, and the TCI states of the n PUSCH opportunities are different.

[0083] Optionally, the time domain resources of the n PUSCH opportunities used for transmitting the PUSCH are the same.

[0084] (2) TDM method: The time domain resources of n PUSCH opportunities used to transmit PUSCH are different, and the TCI states of the n PUSCH opportunities are different.

[0085] Optionally, frequency domain resources of the n PUSCH opportunities used for transmitting the PUSCH are the same.

[0086] (3) SDM method: The DMRS port used for transmitting PUSCH corresponds to at least two CDM groups, and the TCI states corresponding to the at least two CDM groups are different.

[0087] Optionally, the time domain resources and frequency domain resources of the PUSCHs corresponding to the two CDM groups used to transmit the PUSCH are the same.

[0088] (4) SFN method: The TCI states used for PUSCH transmission include at least two TCI states, each of which includes a joint TCI state or an uplink TCI state. Optionally, the time domain resources and frequency domain resources used for PUSCH transmission are the same, and the DMRS ports used for PUSCH demodulation reference signal transmission are the same.

[0089] To sum up, when some channels are configured to transmit based on multiple sets of TCI states and other channels are configured to transmit based on one set of TCI states, the TCI state of the terminal is indicated to improve the signal quality of M-TRP transmission based on the TCI state.

[0090] Please refer to Figure 5 , which shows a flow chart of a method for indicating TCI status provided by an embodiment of the present application. This method can be applied to Figure 1 The method comprises the following steps:

[0091] Step 501: The terminal receives configuration information.

[0092] The configuration information is used to configure the first channel for transmission based on N sets of TCI states, and to configure the second channel for transmission based on one set of TCI states, where N is an integer greater than 1, such as N=2, 3, 4, etc.

[0093] The TCI status is used to inform the terminal to use the same QCL information or spatial Rx parameter as the reference signal or channel state information reference signal sent by the base station when receiving PDCCH / PDSCH; or to inform the terminal to use the same QCL information or spatial relation information or spatial filter as the reference signal sent or received when sending PUCCH / PUSCH.

[0094] The first channel includes at least one of a PDCCH, a PDSCH, a PUCCH, and a PUSCH.

[0095] The second channel includes at least one of a PDCCH, a PDSCH, a PUCCH, and a PUSCH.

[0096] The first channel and the second channel may be the same channel or different channels.

[0097] The first channel is used for transmission based on N sets of TCI states in at least one transmission process. In other words, the first channel is not used for transmission based on multiple sets of TCI states every time, but only one transmission based on N sets of TCI states is sufficient.

[0098] A single set of TCI states includes a joint TCI state, which is used to indicate uplink and downlink channels / reference signals; or a single set of TCI states includes at least one of an uplink TCI state and a downlink TCI state, where the uplink TCI state is used to indicate the uplink channel / reference signal and the downlink TCI state is used to indicate the downlink channel / reference signal.

[0099] Step 502: The terminal receives first indication information.

[0100] The first indication information is used to indicate M sets of TCI states, where M is a positive integer not greater than N. At this time, the number of TCI states indicated by the first indication information can be 1 to N.

[0101] Optionally, the first indication information includes a first Medium Access Control Element (MAC CE). For example, the MAC CE activates M sets of TCI states corresponding to a codepoint in the TCI field of the DCI.

[0102] Optionally, the first indication information includes a second MAC CE and first downlink control information (DCI). For example, the MAC CE activates M sets of TCI states corresponding to multiple codepoints in the TCI field in the DCI, and the TCI field in the DCI is used to indicate one of the codepoints.

[0103] Optionally, when the first channel is a downlink channel and the second channel is an uplink channel, or when the first channel is an uplink channel and the second channel is a downlink channel, at least one of the M sets of TCI states includes at least one of an uplink TCI state and a downlink TCI state. The at least one set of TCI states cannot be a joint TCI state.

[0104] Step 503: The terminal determines at least one set of TCI states corresponding to at least one channel transmission from the M sets of TCI states based on the first indication information.

[0105] Optionally, the channels corresponding to the at least one channel transmission include a first channel and a second channel. Exemplarily, if the at least one channel transmission includes a PDCCH, then both the first channel and the second channel are PDCCHs. If the at least one channel transmission includes a PDCCH and a PUCCH, then the first channel is the PDCCH and the second channel is the PUCCH. Alternatively, the first channel is the PUCCH and the second channel is the PDCCH. Alternatively, the first channel is the PUCCH and the second channel has two parts, one part being the PUCCH and the other being the PDCCH.

[0106] Optionally, when the first channel is PDCCH and M is equal to one, a set of TCI states includes a joint TCI state, or a set of TCI states includes a downlink TCI state or includes a downlink TCI state and an uplink TCI state.

[0107] Optionally, at least one of the first PDCCH candidate and the second PDCCH candidate included in the joint TCI state monitoring PDCCH in a set of TCI states is monitored. Alternatively, at least one of the first PDCCH candidate and the second PDCCH candidate included in the downlink TCI state monitoring PDCCH in a set of TCI states is monitored. The first PDCCH candidate corresponds to a first SS set, the second PDCCH candidate corresponds to a second SS set, and the first SS set and the second SS set are SS sets with a linked relationship; the first SSset is associated with a first control resource set CORESET; and the second SS set is associated with a second CORESET. The first CORESET and the second CORESET may be the same or different.

[0108] For example, based on a joint TCI state monitoring PDCCH in a set of TCI states, one of the first and second PDCCH candidates included in the PDCCH is used as the target PDCCH candidate, such as the first PDCCH candidate. That is, the PDCCH on the first PDCCH candidate is received using the set of TCI states, and the PDCCH on the second PDCCH candidate does not need to be monitored and received. How the terminal determines the target PDCCH candidate corresponding to the set of TCI states includes the following methods:

[0109] The first one, The base station informs the terminal of the correspondence between PDCCH candidates and TCI states.

[0110] Optionally, the terminal receives second configuration information, where the second configuration information is used to indicate a correspondence between each set of TCI states and target PDCCH candidates.

[0111] In an illustrative embodiment, the base station configures a search space set group corresponding to the search space set; or the base station configures a control resource set pool index (CORESETPoolIndex) or a control resource set group (CORESET group) or a channel group (channel group) corresponding to the control resource set (CORESET), and the base station indicates a search space set group or CORESETPoolIndex or CORESET group or channel group corresponding to each TCI state. The correspondence between the PDCCH candidate and the TCI state is determined based on the correspondence between the configuration of the base station and the information indicated by the base station. The above configuration can be configured through at least one of RRC, MAC CE, and DCI. The above indication can be indicated by at least one of RRC, MAC CE, and DCI.

[0112] The second type, Determined according to the default mapping rules.

[0113] Optionally, the terminal determines a set of target PDCCH candidates corresponding to the TCI state from at least two PDCCH candidates based on a default mapping relationship.

[0114] When determining the target PDCCH candidate according to the default mapping rule, at least one of the following methods is included:

[0115] 1) The target PDCCH candidate is the PDCCH candidate with the smallest or smaller control resource set CORESET identifier among the N PDCCH candidates.

[0116] That is, the target PDCCH candidate is the PDCCH candidate having the smallest or smaller corresponding CORESET identity (Identity Document, ID) among the N PDCCH candidates.

[0117] 2) The target PDCCH candidate is the PDCCH candidate with the smallest or smaller corresponding search space set identifier among the N PDCCH candidates.

[0118] That is, the target PDCCH candidate is the PDCCH candidate whose corresponding SS set ID is the smallest or smaller among the N PDCCH candidates.

[0119] 3) The target PDCCH candidate is the PDCCH candidate with the smallest or smaller CORESETPoolIndex of the corresponding CORESET among the N PDCCH candidates.

[0120] 4) The target PDCCH candidate is the PDCCH candidate with the smallest or smaller CORESET group index CORESETgroup ID of the corresponding CORESET among the N PDCCH candidates.

[0121] It is worth noting that the above method of determining the target PDCCH candidate is only an illustrative example and is not limited to this embodiment of the present application.

[0122] Exemplarily, the first and second PDCCH candidates included in the PDCCH are monitored based on a joint TCI state in a set of TCI states, that is, the PDCCHs on the first and second PDCCH candidates are received using the set of TCI states.

[0123] To sum up, when some channels are configured to transmit based on multiple sets of TCI states and some channels are configured to transmit based on one set of TCI states, the TCI state of the terminal is indicated to improve the signal quality of M-TRP transmission based on the TCI state.

[0124] Please refer to Figure 6 , which shows a flow chart of a method for indicating TCI status provided by an embodiment of the present application. This method can be applied to Figure 1 The method comprises the following steps:

[0125] Step 601: The terminal receives configuration information.

[0126] The configuration information is used to configure the first channel for transmission based on N sets of TCI states, and to configure the second channel for transmission based on one set of TCI states, where N is an integer greater than 1.

[0127] The TCI status is used to inform the terminal to use the same QCL information or spatial Rx parameter as the reference signal sent by the receiving base station when receiving PDCCH / PDSCH; or to inform the terminal to use the same QCL information or spatial relation information or spatial filter as the reference signal sent when sending PUCCH / PUSCH.

[0128] The first channel includes at least one of a PDCCH, a PDSCH, a PUCCH, and a PUSCH.

[0129] The second channel includes at least one of a PDCCH, a PDSCH, a PUCCH, and a PUSCH.

[0130] The first channel and the second channel may be the same channel or different channels.

[0131] The first channel is used for transmission based on N sets of TCI states in at least one transmission process. In other words, the first channel is not used for transmission based on multiple sets of TCI states every time, but only one transmission based on N sets of TCI states is sufficient.

[0132] A single set of TCI states includes a joint TCI state, which is applicable to both uplink and downlink channels / reference signals. Alternatively, a single set of TCI states includes at least one of an uplink TCI state and a downlink TCI state, where the uplink TCI state is applicable to uplink channels / reference signals and the downlink TCI state is applicable to downlink channels / reference signals.

[0133] Step 602: The terminal receives second indication information.

[0134] The second indication information is used to indicate N sets of TCI states.

[0135] Optionally, the second indication information includes a third MAC CE. For example, the MAC CE activates N sets of TCI states corresponding to a codepoint of the TCI field in the DCI.

[0136] Optionally, the second indication information includes a fourth MAC CE and a second DCI. For example, the MAC CE activates N sets of TCI states corresponding to multiple codepoints in the TCI field in the DCI, and the TCI field in the DCI is used to indicate one of the codepoints.

[0137] Step 603: The terminal determines at least one set of TCI states corresponding to at least one channel transmission from the N sets of TCI states based on the second indication information.

[0138] Optionally, the channels corresponding to the at least one channel transmission include a first channel and a second channel. Exemplarily, if the at least one channel transmission includes a PDCCH, then both the first channel and the second channel are PDCCHs. If the at least one channel transmission includes a PDCCH and a PUCCH, then the first channel is the PDCCH and the second channel is the PUCCH. Alternatively, the first channel is the PUCCH and the second channel is the PDCCH. Alternatively, the first channel is the PUCCH and the second channel has two parts, one part being the PUCCH and the other being the PDCCH.

[0139] Optionally, in the case where the first channel is PDCCH, the correspondence between N sets of TCI states and N PDCCH candidates is determined. The method for determining the correspondence between the above-mentioned N sets of TCI states and N PDCCH candidates may refer to the following method: receiving third indication information from the base station, the third indication information is used to indicate that L sets of TCI states among the N sets of TCI states indicated by the second indication information are used for the reception of the PDCCH, where L is a positive integer not greater than N, that is, the third indication information may further indicate that a part of the TCI states or all of the TCI states among the N sets of TCI states are used for the reception of the PDCCH. The third indication information includes at least one of radio resource control signaling (RRC), MAC CE and DCI. After determining that the L sets of TCI states can be used for the reception of the PDCCH, the correspondence between the L sets of TCI states and the N PDCCH candidates is further determined. If L=N, the correspondence between the TCI states and the PDCCH candidates is determined based on at least one of the following methods:

[0140] The first one, The base station informs the terminal of the correspondence between PDCCH candidates and TCI states.

[0141] Optionally, the terminal receives third configuration information, where the third configuration information is used to indicate a correspondence between each set of TCI states and target PDCCH candidates.

[0142] Schematically, the base station configures a search space set group corresponding to the search space set; or the base station configures a control resource set pool index CORSETPoolIndex or a control resource set group CORESET group or a channel group channel group corresponding to the control resource set (Control Resource Set, CORESET), and the base station indicates the search space set group or the control resource set pool index CORESETPoolIndex or the control resource set group CORESET group or the channel group channel group corresponding to each TCI state. Then, based on the correspondence between the configuration of the base station and the information indicated by the base station, the correspondence between the PDCCH candidate and the TCI state is determined. The above configuration can be configured through at least one of RRC, MAC CE and DCI. The above indication can be indicated by at least one of RRC, MAC CE and DCI.

[0143] The second type, Determined according to the default mapping rules.

[0144] Optionally, the terminal determines the correspondence between the PDCCH candidate and the TCI state based on a default mapping relationship. The default mapping relationship may be pre-stored in the terminal, pre-configured to the terminal by the access network device, or obtained by the terminal according to the third indication information.

[0145] When determining the correspondence between the PDCCH candidate and the TCI state according to the default mapping rule, at least one of the following methods is included:

[0146] 1) The PDCCH candidate with the smallest control resource set (CORESET) identifier among the PDCCH candidates is assigned to the first set of TCI states. The first set of TCI states is the TCI state with the smallest TCI state identifier, or the TCI state located in the lower bit position in the MAC CE of multiple sets of TCI states corresponding to the activated codepoint. The others are assigned in order.

[0147] 2) The PDCCH candidate with the smallest search space set identifier among the PDCCH candidates is assigned to the first set of TCI states. The first set of TCI states is the TCI state with the smallest TCI state identifier, or the TCI state located in the lower bit position in the MAC CE used to activate multiple sets of TCI states corresponding to the codepoint. The others are assigned in order.

[0148] 3) The PDCCH candidate with the smallest CORESET pool index CORESETPoolIndex corresponding to the CORESET in the PDCCH candidate is mapped to the first set of TCI states. The first set of TCI states is the TCI state with the smallest TCI state identifier, or the TCI state located in the lower bit position in the MAC CE of the multiple sets of TCI states corresponding to the activation codepoint. The others are mapped in sequence.

[0149] 4) The PDCCH candidate with the smallest CORESET group ID corresponds to the first set of TCI states. The first set of TCI states is the TCI state with the smallest TCI state identifier, or the TCI state located in the lower bit position in the MAC CE for multiple sets of TCI states corresponding to the activation codepoint. The others are corresponding in order.

[0150] If L=1, one method is to use a set of TCI states for all PDCCH candidates. Another method is to use a set of TCI states for a target PDCCH candidate among N PDCCH candidates. The target PDCCH candidate can also be determined according to the above base station configuration or default mapping rule.

[0151] Optionally, when the second channel is PDCCH, that is, L=1 and PDCCH reception includes only one PDCCH candidate, the above-mentioned method of the first channel being PDCCH can also be used to indicate which of the N sets of TCI states is used for reception of the second channel, which will not be repeated here.

[0152] It is worth noting that the above method of determining the correspondence between TCI states and PDCCH candidates is only an illustrative example and is not limited to this embodiment of the present application.

[0153] Optionally, when the first channel is a PDSCH, fourth indication information is received from the base station. The fourth indication information is used to indicate that H of the N TCI states indicated by the second indication information are used for receiving the PDSCH, where H is a positive integer not greater than N. That is, the fourth indication information may further indicate that some or all of the N TCI states are used for receiving the PDSCH. The fourth indication information includes at least one of radio resource control (RRC) signaling, MAC CE, and DCI. After determining that the H TCI states are usable for receiving the PDSCH, a correspondence between the H TCI states and N PDSCH opportunities is further determined. This includes determining a correspondence between the H TCI states and PDSCH opportunities at different times; or determining a correspondence between the H TCI states and PDSCH opportunities in different frequency domains; or determining a correspondence between the H TCI states and PDSCH opportunities corresponding to demodulation reference signal (DMRS) ports of different space division multiplexing (SDM) groups. The method for determining the above correspondence can refer to the following method:

[0154] (1) A default mapping relationship is used as the above-mentioned corresponding relationship. The default mapping relationship may be pre-stored in the terminal, pre-configured to the terminal by the access network device, or obtained by the terminal according to the fourth indication information. The default mapping relationship includes a first set of TCI states applicable to at least one of a PDSCH opportunity at a first time, a PDSCH opportunity in a first frequency domain, a PDSCH opportunity in a first CDM group, or a PDSCH opportunity in a first time group; and a second set of TCI states applicable to a PDSCH opportunity at a second time, a PDSCH opportunity in a second frequency domain, a PDSCH opportunity in a second CDM group, or a PDSCH opportunity in a second time group.

[0155] Optionally, when the second channel is PDSCH, that is, H=1 and PDSCH reception is based on a set of TCI states, the above-mentioned method of the first channel being PDSCH can also be used to indicate which set of N sets of TCI states is used for reception of the second channel, which will not be repeated here.

[0156] Optionally, when the first channel is PUCCH, the fifth indication information of the base station is received, and the fifth indication information is used to indicate that K sets of TCI states among the N sets of TCI states indicated by the second indication information are used for the reception of the PUCCH, where K is a positive integer not greater than N, that is, the fifth indication information can further indicate that a part of the TCI states or all TCI states among the N sets of TCI states are used for the reception of the PUCCH. The fifth indication information includes at least one of radio resource control signaling (Radio Resource Control, RRC), MAC CE and DCI. After determining that K sets of TCI states can be used for the reception of the PUCCH, the correspondence between the K sets of TCI states and the N PUCCH opportunities is further determined. Including determining the correspondence between K sets of TCI states and PUCCH opportunities at different times; or, determining the correspondence between K sets of TCI states and PUCCH opportunities in different frequency domains; or, determining the correspondence between K sets of TCI states and PUCCH opportunities corresponding to DMRS ports of different CDM groups. The method for determining the above correspondence may refer to the following method:

[0157] (1) A default mapping relationship is used as the above-mentioned corresponding relationship. The default mapping relationship may be pre-stored in the terminal, pre-configured to the terminal by the access network device, or obtained by the terminal according to the fifth indication information. The default mapping relationship includes a first set of TCI states applicable to at least one of a PUCCH opportunity at a first time, a PUCCH opportunity in a first frequency domain, a PUCCH opportunity in a first CDM group, or a PUCCH opportunity in a first time group; and a second set of TCI states applicable to a PUCCH opportunity at a second time, a PUCCH opportunity in a second frequency domain, a PUCCH opportunity in a second CDM group, or a PUCCH opportunity in a second time group.

[0158] Optionally, when the second channel is PUCCH, that is, K=1 and the PUCCH transmission is based on a set of TCI states, the above-mentioned method of the first channel being PUCCH can also be used to indicate which set of TCI states among the N sets of TCI states is used for transmission of the second channel, which will not be repeated here.

[0159] Optionally, when the first channel is PUSCH, the sixth indication information of the base station is received, and the sixth indication information is used to indicate that Q sets of TCI states among the N sets of TCI states indicated by the second indication information are used for the reception of the PUSCH, where Q is a positive integer not greater than N, that is, the sixth indication information can further indicate that part of the TCI states or all TCI states among the N sets of TCI states are used for the reception of the PUSCH. The sixth indication information includes at least one of radio resource control signaling (Radio Resource Control, RRC), MAC CE and DCI. After determining that the Q sets of TCI states can be used for the reception of the PUSCH, the correspondence between the Q sets of TCI states and the N PUSCH opportunities is further determined. This includes determining the correspondence between the Q sets of TCI states and PUSCH opportunities at different times; or, determining the correspondence between the Q sets of TCI states and PUSCH opportunities in different frequency domains; or, determining the correspondence between the Q sets of TCI states and PUSCH opportunities corresponding to DMRS ports of different CDM groups. The method for determining the above correspondence may refer to the following method:

[0160] (1) A default mapping relationship is used as the above-mentioned corresponding relationship. The default mapping relationship may be pre-stored in the terminal, pre-configured to the terminal by the access network device, or obtained by the terminal according to the sixth indication information. The default mapping relationship includes a first set of TCI states applicable to at least one of a first time PUSCH opportunity, a first frequency domain PUSCH opportunity, a first CDM group PUSCH opportunity, or a first time group PUSCH opportunity; and a second set of TCI states applicable to a second time PUSCH opportunity, a second frequency domain PUSCH opportunity, a second CDM group PUSCH opportunity, or a second time group PUSCH opportunity.

[0161] Optionally, when the second channel is PUSCH, that is, Q=1 and PUSCH transmission is based on a set of TCI states, the above-mentioned method of the first channel being PUSCH can also be used to indicate which set of TCI states among the N sets of TCI states is used for transmission of the second channel, which will not be repeated here.

[0162] To sum up, when some channels are configured to transmit based on multiple sets of TCI states and some channels are configured to transmit based on one set of TCI states, the TCI state of the terminal is indicated to improve the signal quality of M-TRP transmission based on the TCI state.

[0163] Please refer to Figure 7 , which shows a flow chart of a method for indicating TCI status provided by an embodiment of the present application. This method can be applied to Figure 1 The access network device in the communication system shown in FIG. The method comprises the following steps:

[0164] Step 701: Send configuration information to the terminal, where the configuration information is used to configure a first channel for transmission based on N sets of TCI states and a second channel for transmission based on one set of TCI states, where N is an integer greater than 1.

[0165] The TCI status is used to inform the terminal to use the same QCL information or spatial Rx parameter as the reference signal sent by the receiving base station when receiving PDCCH / PDSCH; or to inform the terminal to use the same QCL information or spatial relation information or spatial filter as the reference signal sent when sending PUCCH / PUSCH.

[0166] The first channel includes at least one of a physical downlink control channel PDCCH, PDSCH, PUCCH, and PUSCH.

[0167] The second channel includes at least one of a PDCCH, a PDSCH, a PUCCH, and a PUSCH.

[0168] The first channel and the second channel can be the same channel or different channels. For example, the first channel is the PDCCH, and the second channel is the PDSCH, PUCCH, or PUSCH. For another example, the first channel and the second channel are both PDCCHs. Alternatively, the first channel and the second channel are both PDSCHs.

[0169] Exemplarily, the first channel and the second channel are both PDCCHs, but the CORESET corresponding to the first channel and the CORESET corresponding to the second channel are different. Alternatively, the SS set corresponding to the first channel and the SS set corresponding to the second channel are different. The number of CORESETs corresponding to the first channel or the second channel may be one or more, and the number of SS sets corresponding to the first channel or the second channel may also be one or more.

[0170] Exemplarily, both the first channel and the second channel are PUSCHs, the configuration of the first channel is dynamic configuration, and the configuration of the second channel is static configuration 1 or static configuration 2.

[0171] Exemplarily, both the first channel and the second channel are PUCCH, the first channel is configured with multiple sets of TCI states, and the aforementioned multiple sets of TCI states correspond to the transmission of M-TRP; and the second channel is configured with one set of TCI states, and the aforementioned set of TCI states corresponds to the transmission of S-TRP.

[0172] Exemplarily, both the first channel and the second channel are PDSCHs, the DCI corresponding to the first channel belongs to the first CORESET and the first SS set, and the DCI corresponding to the second channel belongs to the second CORESET and the second SS set. The first CORESET and the second CORESET may be the same or different, and the first SS set and the second SS set may be the same or different.

[0173] The first channel is used for transmission based on N sets of TCI states in at least one transmission process. In other words, the first channel is not used for transmission based on multiple sets of TCI states every time, but only one transmission based on N sets of TCI states is sufficient.

[0174] A single set of TCI states includes a joint TCI state, which is a TCI state that applies to both uplink and downlink channels / reference signals. Alternatively, a single set of TCI states includes at least one of an uplink TCI state and a downlink TCI state, where the uplink TCI state is used to indicate an uplink channel / reference signal and the downlink TCI state is used to indicate a downlink channel / reference signal.

[0175] Optionally, the terminal receives first indication information indicating M sets of TCI states. Based on the first indication information, the terminal determines at least one set of TCI states corresponding to at least one channel transmission from the M sets of TCI states. M is a positive integer not greater than N. In this case, the number of TCI states indicated by the first indication information may range from 1 to N.

[0176] Optionally, the first indication information includes a second MAC CE and DCI. For example, the MAC CE activates M sets of TCI states corresponding to multiple codepoints in the TCI field in the DCI, and the TCI field in the DCI is used to indicate one of the codepoints.

[0177] Optionally, the channels corresponding to at least one channel transmission include a first channel and a second channel.

[0178] Optionally, when the first channel is PDCCH and M is equal to one, a set of TCI states includes a joint TCI state, or a set of TCI states includes a downlink TCI state or includes a downlink TCI state and an uplink TCI state.

[0179] Optionally, the first PDCCH candidate or the second PDCCH candidate included in the PDCCH is monitored based on the joint TCI state in a set of TCI states. Alternatively, the first PDCCH candidate or the second PDCCH candidate included in the PDCCH is monitored based on the downlink TCI state in a set of TCI states. The first PDCCH candidate corresponds to a first SS set, the second PDCCH candidate corresponds to a second SS set, and the first SS set and the second SS set are SS sets with a linked relationship; the first SS set is associated with a first control resource set CORESET; and the second SS set is associated with a second CORESET. The first CORESET and the second CORESET may be the same or different.

[0180] For example, based on a joint TCI state in a set of TCI states, one of the first and second PDCCH candidates included in the monitoring PDCCH is used as a target PDCCH candidate, such as the first PDCCH candidate. That is, the PDCCH on the first PDCCH candidate is received using the set of TCI states, and the PDCCH on the second PDCCH candidate does not need to be monitored and received. How the terminal determines the target PDCCH candidate corresponding to the set of TCI states includes the following methods:

[0181] The first one, The base station informs the terminal of the correspondence between PDCCH candidates and TCI states.

[0182] Optionally, the terminal receives second configuration information, where the second configuration information is used to indicate a correspondence between each set of TCI states and target PDCCH candidates.

[0183] In an illustrative embodiment, the base station configures a search space set group corresponding to the search space set; or the base station configures a control resource set pool index (CORESETPoolIndex) or a control resource set group (CORESET group) or a channel group (channel group) corresponding to the control resource set (CORESET), and the base station indicates a search space set group or CORESETPoolIndex or CORESET group or channel group corresponding to each TCI state. The correspondence between the PDCCH candidate and the TCI state is determined based on the correspondence between the configuration of the base station and the information indicated by the base station. The above configuration can be configured through at least one of RRC, MAC CE, and DCI. The above indication can be indicated by at least one of RRC, MAC CE, and DCI.

[0184] The second type, Determined according to the default mapping rules.

[0185] Optionally, the terminal determines a set of target PDCCH candidates corresponding to the TCI state from two PDCCH candidates based on a default mapping relationship.

[0186] When determining the target PDCCH candidate according to the default mapping rule, at least one of the following methods is included:

[0187] 1) The target PDCCH candidate is the PDCCH candidate with the smallest or smaller control resource set CORESET identifier among the N PDCCH candidates.

[0188] That is, the target PDCCH candidate is the PDCCH candidate with the smallest or smaller corresponding CORESET ID among the N PDCCH candidates.

[0189] 2) The target PDCCH candidate is the PDCCH candidate with the smallest or smaller corresponding search space set identifier among the N PDCCH candidates.

[0190] That is, the target PDCCH candidate is the PDCCH candidate whose corresponding SS set ID is the smallest or smaller among the N PDCCH candidates.

[0191] 3) The target PDCCH candidate is the PDCCH candidate with the smallest or smaller CORESETPoolIndex of the corresponding CORESET among the N PDCCH candidates.

[0192] 4) The target PDCCH candidate is the PDCCH candidate with the smallest or smaller CORESET group index CORESETgroup ID of the corresponding CORESET among the N PDCCH candidates.

[0193] It is worth noting that the above method of determining the target PDCCH candidate is only an illustrative example and is not limited to this embodiment of the present application.

[0194] Exemplarily, the first and second PDCCH candidates included in the PDCCH are monitored based on a joint TCI state in a set of TCI states, that is, the PDCCHs on the first and second PDCCH candidates are received using the set of TCI states.

[0195] Optionally, the terminal receives second indication information, where the second indication information is used to indicate N sets of TCI states; based on the second indication information, the terminal determines at least one set of TCI states corresponding to at least one channel transmission from the N sets of TCI states.

[0196] Optionally, in the case where the first channel is PDCCH, the correspondence between N sets of TCI states and N PDCCH candidates is determined. The method for determining the correspondence between the above-mentioned N sets of TCI states and N PDCCH candidates may refer to the following method: receiving third indication information from the base station, the third indication information is used to indicate that L sets of TCI states among the N sets of TCI states indicated by the second indication information are used for the reception of the PDCCH, where L is a positive integer not greater than N, that is, the third indication information may further indicate that a part of the TCI states or all of the TCI states among the N sets of TCI states are used for the reception of the PDCCH. The third indication information includes at least one of radio resource control signaling (RRC), MAC CE and DCI. After determining that the L sets of TCI states can be used for the reception of the PDCCH, the correspondence between the L sets of TCI states and the N PDCCH candidates is further determined. If L=N, the correspondence between the TCI states and the PDCCH candidates is determined based on at least one of the following methods:

[0197] The first one, The base station informs the terminal of the correspondence between PDCCH candidates and TCI states.

[0198] Optionally, the terminal receives third configuration information, where the third configuration information is used to indicate a correspondence between each set of TCI states and target PDCCH candidates.

[0199] Indicatively, the base station configures a search space set group corresponding to the search space set; or the base station configures a control resource set pool index CORSETPoolIndex or a control resource set group CORESET group or a channel group channel group corresponding to the control resource set (CORESET), and the base station indicates the search space set group or the control resource set pool index CORESETPoolIndex or the control resource set group CORESET group or the channel group channel group corresponding to each TCI state. The correspondence between the PDCCH candidate and the TCI state is determined based on the correspondence between the configuration of the base station and the information indicated by the base station. The above configuration can be configured through at least one of RRC, MAC CE and DCI. The above indication can be indicated by at least one of RRC, MAC CE and DCI.

[0200] The second type, Determined according to the default mapping rules.

[0201] Optionally, the terminal determines the correspondence between the PDCCH candidate and the TCI state based on a default mapping relationship. The default mapping relationship may be pre-stored in the terminal, pre-configured to the terminal by the access network device, or obtained by the terminal according to the third indication information.

[0202] When determining the correspondence between the PDCCH candidate and the TCI state according to the default mapping rule, at least one of the following methods is included:

[0203] 1) The PDCCH candidate with the smallest control resource set (CORESET) identifier among the PDCCH candidates is assigned to the first set of TCI states. The first set of TCI states is the TCI state with the smallest TCI state identifier, or the TCI state located in the lower bit position in the MAC CE of multiple sets of TCI states corresponding to the activated codepoint. The others are assigned in order.

[0204] 2) The PDCCH candidate with the smallest search space set identifier among the PDCCH candidates is assigned to the first set of TCI states. The first set of TCI states is the TCI state with the smallest TCI state identifier, or the TCI state located in the lower bit position in the MAC CE used to activate multiple sets of TCI states corresponding to the codepoint. The others are assigned in order.

[0205] 3) The PDCCH candidate with the smallest CORESET pool index CORESETPoolIndex corresponding to the CORESET in the PDCCH candidate is mapped to the first set of TCI states. The first set of TCI states is the TCI state with the smallest TCI state identifier, or the TCI state located in the lower bit position in the MAC CE of the multiple sets of TCI states corresponding to the activation codepoint. The others are mapped in sequence.

[0206] 4) The PDCCH candidate with the smallest CORESET group ID of the CORESET corresponding to the PDCCH candidate is mapped to the first set of TCI states. The first set of TCI states is the TCI state with the smallest TCI state identifier, or the TCI state located in the lower bit position in the MAC CE of the multiple sets of TCI states corresponding to the activating codepoint. The others are mapped in order.

[0207] If L=1, one method is to use a set of TCI states for all PDCCH candidates. Another method is to use a set of TCI states for a target PDCCH candidate among N PDCCH candidates. The target PDCCH candidate can also be determined according to the above base station configuration or default mapping rule.

[0208] Optionally, when the second channel is PDCCH, that is, L=1 and PDCCH reception includes only one PDCCH candidate, the above-mentioned method of the first channel being PDCCH can also be used to indicate which of the N sets of TCI states is used for reception of the second channel, which will not be repeated here.

[0209] It is worth noting that the above method of determining the correspondence between TCI states and PDCCH candidates is only an illustrative example and is not limited to this embodiment of the present application.

[0210] Optionally, when the first channel is a PDSCH, fourth indication information is received from the base station. The fourth indication information is used to indicate that H of the N TCI states indicated by the second indication information are used for receiving the PDSCH, where H is a positive integer not greater than N. That is, the fourth indication information may further indicate that some or all of the N TCI states are used for receiving the PDSCH. The fourth indication information includes at least one of radio resource control (RRC) signaling, MAC CE, and DCI. After determining that the H TCI states are usable for receiving the PDSCH, a correspondence between the H TCI states and N PDSCH opportunities is further determined. This includes determining a correspondence between the H TCI states and PDSCH opportunities at different times; or determining a correspondence between the H TCI states and PDSCH opportunities in different frequency domains; or determining a correspondence between the H TCI states and PDSCH opportunities corresponding to demodulation reference signal (DMRS) ports of different space division multiplexing (SDM) groups. The method for determining the above correspondence can refer to the following method:

[0211] (1) A default mapping relationship is used as the above-mentioned corresponding relationship. The default mapping relationship may be pre-stored in the terminal, pre-configured to the terminal by the access network device, or obtained by the terminal according to the fourth indication information. The default mapping relationship includes a first set of TCI states applicable to at least one of a PDSCH opportunity at a first time, a PDSCH opportunity in a first frequency domain, a PDSCH opportunity in a first CDM group, or a PDSCH opportunity in a first time group; and a second set of TCI states applicable to a PDSCH opportunity at a second time, a PDSCH opportunity in a second frequency domain, a PDSCH opportunity in a second CDM group, or a PDSCH opportunity in a second time group.

[0212] Optionally, when the second channel is PDSCH, that is, H=1 and PDSCH reception is based on a set of TCI states, the above-mentioned method of the first channel being PDSCH can also be used to indicate which set of N sets of TCI states is used for reception of the second channel, which will not be repeated here.

[0213] Optionally, when the first channel is PUCCH, the fifth indication information of the base station is received, and the fifth indication information is used to indicate that K sets of TCI states among the N sets of TCI states indicated by the second indication information are used for the reception of the PUCCH, where K is a positive integer not greater than N, that is, the fifth indication information can further indicate that part of the TCI states or all TCI states among the N sets of TCI states are applicable to the reception of the PUCCH. The fifth indication information includes at least one of radio resource control signaling (Radio Resource Control, RRC), MAC CE and DCI. After determining that K sets of TCI states can be used for the reception of the PUCCH, the correspondence between the K sets of TCI states and the N PUCCH opportunities is further determined. Including determining the correspondence between K sets of TCI states and PUCCH opportunities at different times; or, determining the correspondence between K sets of TCI states and PUCCH opportunities in different frequency domains; or, determining the correspondence between K sets of TCI states and PUCCH opportunities corresponding to DMRS ports of different CDM groups. The method for determining the above correspondence may refer to the following method:

[0214] (1) A default mapping relationship is used as the above-mentioned corresponding relationship. The default mapping relationship may be pre-stored in the terminal, pre-configured to the terminal by the access network device, or obtained by the terminal according to the fifth indication information. The default mapping relationship includes a first set of TCI states applicable to at least one of a PUCCH opportunity at a first time, a PUCCH opportunity in a first frequency domain, a PUCCH opportunity in a first CDM group, or a PUCCH opportunity in a first time group; and a second set of TCI states applicable to a PUCCH opportunity at a second time, a PUCCH opportunity in a second frequency domain, a PUCCH opportunity in a second CDM group, or a PUCCH opportunity in a second time group.

[0215] Optionally, when the second channel is PUCCH, that is, K=1 and the PUCCH transmission is based on a set of TCI states, the above-mentioned method of the first channel being PUCCH can also be used to indicate which set of TCI states among the N sets of TCI states is used for transmission of the second channel, which will not be repeated here.

[0216] Optionally, when the first channel is PUSCH, the sixth indication information of the base station is received, and the sixth indication information is used to indicate that Q sets of TCI states among the N sets of TCI states indicated by the second indication information are used for the reception of the PUSCH, where Q is a positive integer not greater than N, that is, the sixth indication information can further indicate that part of the TCI states or all TCI states among the N sets of TCI states are used for the reception of the PUSCH. The sixth indication information includes at least one of radio resource control signaling (Radio Resource Control, RRC), MAC CE and DCI. After determining that the Q sets of TCI states can be used for the reception of the PUSCH, the correspondence between the Q sets of TCI states and the N PUSCH opportunities is further determined. This includes determining the correspondence between the Q sets of TCI states and PUSCH opportunities at different times; or, determining the correspondence between the Q sets of TCI states and PUSCH opportunities in different frequency domains; or, determining the correspondence between the Q sets of TCI states and PUSCH opportunities corresponding to DMRS ports of different CDM groups. The method for determining the above correspondence may refer to the following method:

[0217] (1) A default mapping relationship is used as the above-mentioned corresponding relationship. The default mapping relationship may be pre-stored in the terminal, pre-configured to the terminal by the access network device, or obtained by the terminal according to the sixth indication information. The default mapping relationship includes a first set of TCI states for at least one of a first time PUSCH opportunity, a first frequency domain PUSCH opportunity, a first CDM group PUSCH opportunity, or a first time group PUSCH opportunity; and a second set of TCI states for a second time PUSCH opportunity, a second frequency domain PUSCH opportunity, a second CDM group PUSCH opportunity, or a second time group PUSCH opportunity.

[0218] Optionally, when the second channel is PUSCH, that is, Q=1 and PUSCH transmission is based on a set of TCI states, the above-mentioned method of the first channel being PUSCH can also be used to indicate which set of TCI states among the N sets of TCI states is used for transmission of the second channel, which will not be repeated here.

[0219] To sum up, when some channels are configured to transmit based on multiple sets of TCI states and some channels are configured to transmit based on one set of TCI states, the TCI state of the terminal is indicated to improve the signal quality of M-TRP transmission based on the TCI state.

[0220] Figure 8 FIG. 1 is a structural block diagram of a TCI status indication device provided by an exemplary embodiment of the present application. Figure 8 As shown, the device includes:

[0221] The receiving module 801 is used to receive configuration information, where the configuration information is used to configure the first channel for transmission based on N sets of TCI states and to configure the second channel for transmission based on one set of TCI states, where N is an integer greater than 1.

[0222] In an optional design, the first channel includes at least one of PDCCH, PDSCH, PUCCH and PUSCH.

[0223] In an optional design, the second channel includes at least one of PDCCH, PDSCH, PUCCH and PUSCH.

[0224] In an optional design, the first channel is used for transmission based on the N sets of TCI states during at least one transmission process.

[0225] In an optional design, the single set of TCI states includes a joint TCI state, where the joint TCI state is used to indicate uplink and downlink channels / reference signals; or, the single set of TCI states includes at least one of an uplink TCI state and a downlink TCI state.

[0226] In an optional design, the receiving module 801 is further configured to receive first indication information, where the first indication information is configured to indicate M sets of TCI states, where M is a positive integer not greater than N.

[0227] The processing module 802 is configured to determine, based on the first indication information, at least one set of TCI states corresponding to at least one channel transmission from the M sets of TCI states, where the channels corresponding to the at least one channel transmission include the first channel and the second channel.

[0228] In an optional design, the first indication information includes a first MAC CE; or, the first indication information includes a second MAC CE and a first DCI.

[0229] In an optional design, when the first channel is a downlink channel and the second channel is an uplink channel or the first channel is an uplink channel and the second channel is a downlink channel, at least one set of TCI states in the M sets of TCI states includes at least one of an uplink TCI state and a downlink TCI state.

[0230] In an optional design, when the first channel is PDCCH and M is equal to one, the set of TCI states includes a joint TCI state, or the set of TCI states includes a downlink TCI state or includes a downlink TCI state and an uplink TCI state.

[0231] In an optional design, the first PDCCH candidate or the second PDCCH candidate contained in the PDCCH is monitored based on the joint TCI state in the set of TCI states; or, the first PDCCH candidate or the second PDCCH candidate contained in the PDCCH is monitored based on the downlink TCI state in the set of TCI states.

[0232] In an optional design, the first PDCCH candidate corresponds to a first SS set, the second PDCCH candidate corresponds to a second SS set, the first SS set and the second SS set are SS sets with a linked relationship; the first SS set is associated with a first CORESET; the second SS set is associated with a second CORESET.

[0233] In an optional design, the receiving module 801 is further configured to receive second indication information, where the second indication information is configured to indicate the status of N sets of TCIs.

[0234] The processing module 802 is further configured to determine, based on the second indication information, at least one set of TCI states corresponding to at least one channel transmission from the N sets of TCI states, where the channels corresponding to the at least one channel transmission include the first channel and the second channel.

[0235] To sum up, when some channels are configured to transmit based on multiple sets of TCI states and some channels are configured to transmit based on one set of TCI states, the TCI state of the terminal is indicated to improve the signal quality of M-TRP transmission based on the TCI state.

[0236] Figure 9 FIG. 1 is a structural block diagram of a TCI status indication device provided by an exemplary embodiment of the present application. Figure 9 As shown, the device includes:

[0237] The sending module 901 is used to send configuration information to the terminal, where the configuration information is used to configure the first channel for transmission based on N sets of transmission configuration indication TCI states, and to configure the second channel for transmission based on one set of TCI states, where N is an integer greater than 1.

[0238] In an optional design, the first channel includes at least one of PDCCH, PDSCH, PUCCH and PUSCH.

[0239] In an optional design, the second channel includes at least one of PDCCH, PDSCH, PUCCH and PUSCH.

[0240] In an optional design, the first channel is used for transmission based on the N sets of TCI states during at least one transmission process.

[0241] In an optional design, the single set of TCI states includes a joint TCI state, where the joint TCI state is used for uplink and downlink channels / reference signals; or, the single set of TCI states includes at least one of an uplink TCI state and a downlink TCI state.

[0242] In an optional design, the sending module 901 is also used to send a first indication information to the terminal, where the first indication information is used to indicate M sets of TCI states. The first indication information is used by the terminal to determine at least one set of TCI states corresponding to at least one channel transmission, and the channels corresponding to the at least one channel transmission include the first channel and the second channel, where M is a positive integer not greater than N.

[0243] In an optional design, the first indication information includes a first MAC CE; or, the first indication information includes a second MAC CE and a first DCI.

[0244] In an optional design, when the first channel is a downlink channel and the second channel is an uplink channel or the first channel is an uplink channel and the second channel is a downlink channel, at least one set of TCI states in the M sets of TCI states includes at least one of an uplink TCI state and a downlink TCI state.

[0245] In an optional design, when the first channel is PDCCH and M is equal to one, the set of TCI states includes a joint TCI state, or the set of TCI states includes a downlink TCI state or includes a downlink TCI state and an uplink TCI state.

[0246] In an optional design, the joint TCI state in the set of TCI states is used by the terminal to monitor the first PDCCH candidate or the second PDCCH candidate contained in the PDCCH; or, the downlink TCI state in the set of TCI states is used by the terminal to monitor the first PDCCH candidate or the second PDCCH candidate contained in the PDCCH.

[0247] In an optional design, the first PDCCH candidate corresponds to a first SS set; the second PDCCH candidate corresponds to a second SS set; the first SS set and the second SS set are SS sets with a linked relationship; the first SSset is associated with a first CORESET; and the second SS set is associated with a second CORESET.

[0248] In an optional design, the sending module 901 is also used to send a second indication information to the terminal, where the second indication information is used to indicate N sets of TCI states; the second indication information is also used by the terminal to determine at least one set of TCI states corresponding to at least one channel transmission from the N sets of TCI states, and the channels corresponding to the at least one channel transmission include the first channel and the second channel.

[0249] To sum up, when some channels are configured to transmit based on multiple sets of TCI states and some channels are configured to transmit based on one set of TCI states, the TCI state of the terminal is indicated to improve the signal quality of M-TRP transmission based on the TCI state.

[0250] Please refer to Figure 10 , which shows a schematic structural diagram of a terminal 1000 provided in one embodiment of the present application. The terminal 1000 may include: a processor 1001 , a transceiver 1002 , and a memory 1003 .

[0251] The processor 1001 includes one or more processing cores. The processor 1001 executes various functional applications and information processing by running software programs and modules.

[0252] The transceiver 1002 may include a receiver and a transmitter. For example, the receiver and the transmitter may be implemented as the same wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0253] The memory 1003 may be connected to the processor 1001 and the transceiver 1002 .

[0254] The memory 1003 may be used to store a computer program executed by the processor, and the processor 1001 is used to execute the computer program to implement the various steps executed by the terminal in the wireless communication system in the above method embodiment.

[0255] In addition, the memory 1003 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, and the volatile or non-volatile storage device includes but is not limited to: a magnetic disk or optical disk, an electrically erasable programmable read-only memory, an erasable programmable read-only memory, a static access memory, a read-only memory, a magnetic memory, a flash memory, and a programmable read-only memory.

[0256] The process performed by the transceiver 1002 may refer to the steps performed by the terminal in the above method.

[0257] Please refer to Figure 11, which shows a schematic diagram of the structure of a network device 1100 provided in one embodiment of the present application. The network device 1100 may include: a processor 1101 , a transceiver 1102 , and a memory 1103 .

[0258] The processor 1101 includes one or more processing cores. The processor 1101 executes various functional applications and information processing by running software programs and modules.

[0259] The transceiver 1102 may include a receiver and a transmitter. For example, the transceiver 1102 may include a wired communication component, which may include a wired communication chip and a wired interface (such as an optical fiber interface). Optionally, the transceiver 1102 may also include a wireless communication component, which may include a wireless communication chip and a radio frequency antenna.

[0260] The memory 1103 may be connected to the processor 1101 and the transceiver 1102 .

[0261] The memory 1103 may be used to store a computer program executed by the processor, and the processor 1101 is used to execute the computer program to implement the various steps executed by the terminal in the wireless communication system in the above method embodiment.

[0262] In addition, the memory 1103 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, including but not limited to: magnetic disk or optical disk, electrically erasable programmable read-only memory, erasable programmable read-only memory, static random access memory, read-only memory, magnetic memory, flash memory, and programmable read-only memory.

[0263] An embodiment of the present application also provides a computer-readable storage medium, in which a computer program is stored. The computer program is loaded and executed by a processor to implement the various steps performed by the terminal or access network device in the method shown above.

[0264] The present application also provides a computer program product, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform each step of the method shown above, as performed by the terminal or access network device.

[0265] The present application also provides a chip, which is used to run in a computer device so that the computer device executes each step in the method shown above, which is executed by the terminal or access network device.

[0266] The present application also provides a computer program, which is executed by a processor of a computer device to implement the various steps performed by a terminal or an access network device in the method shown above.

[0267] Those skilled in the art will appreciate that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented using hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transmission of computer programs from one place to another. The storage medium can be an available medium that can be accessed by a general-purpose or special-purpose computer.

[0268] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for indicating a transmission configuration indication (TCI) state, characterized in that: The method is executed by a terminal, and includes: receiving configuration information for configuring a first channel for transmission based on N sets of TCI states and configuring a second channel for transmission based on one set of TCI states, where N is an integer greater than 1; receiving first indication information, where the first indication information is used to indicate M sets of TCI states, where M is a positive integer not greater than N; Determining, based on the first indication information, at least one set of TCI states corresponding to at least one channel transmission from the M sets of TCI states, where channels corresponding to the at least one channel transmission include the first channel and the second channel; In a case where the first channel includes a physical downlink control channel (PDCCH) and M is equal to one, the set of TCI states includes a joint TCI state, or the set of TCI states includes a downlink TCI state or includes the downlink TCI state and an uplink TCI state; Based on the joint TCI state in the set of TCI states, monitor at least one of the first PDCCH candidate and the second PDCCH candidate contained in the PDCCH; or, based on the downlink TCI state in the set of TCI states, monitor at least one of the first PDCCH candidate and the second PDCCH candidate contained in the PDCCH, and the first search space set SS set corresponding to the first PDCCH candidate and the second SS set corresponding to the second PDCCH candidate have a link relationship.

2. The method according to claim 1, characterized in that The second channel includes at least one of a PDCCH, a physical downlink shared channel PDSCH, a physical uplink control channel PUCCH, and a physical uplink shared channel PUSCH.

3. The method according to claim 1, characterized in that The first channel is used for transmission based on the N sets of TCI states in at least one transmission process.

4. The method according to claim 1, wherein A single set of TCI states includes the joint TCI state, where the joint TCI state is a TCI state applicable to both uplink and downlink channels / reference signals; Alternatively, the single set of TCI states includes at least one of the uplink TCI state and the downlink TCI state.

5. The method according to claim 1, wherein The first indication information includes a first media access layer control element MAC CE; Alternatively, the first indication information includes a second MAC CE and first downlink control information DCI.

6. The method according to claim 1, characterized in that In a case where the first channel is a downlink channel and the second channel is an uplink channel, at least one set of TCI states among the M sets of TCI states includes at least one of the uplink TCI state and the downlink TCI state.

7. The method according to claim 1, characterized in that The first SS Set is associated with a first control resource set CORESET, and the second SS Set is associated with a second CORESET. The first CORESET and the second CORESET are the same or different.

8. A method for indicating a transmission configuration indication (TCI) state, characterized in that: The method is performed by an access network device, and the method includes: Sending configuration information to the terminal, where the configuration information is used to configure the first channel for transmission based on N sets of TCI states and to configure the second channel for transmission based on one set of TCI states, where N is an integer greater than 1; sending first indication information, where the first indication information is used to indicate M sets of TCI states, where M is a positive integer not greater than N; the first indication information is used by the terminal to determine at least one set of TCI states corresponding to at least one channel transmission from the M sets of TCI states, where the channels corresponding to the at least one channel transmission include the first channel and the second channel; In the case where the first channel includes a physical downlink control channel PDCCH and M is equal to one, the set of TCI states includes a joint TCI state, or the set of TCI states includes a downlink TCI state or includes the downlink TCI state and an uplink TCI state; the joint TCI state in the set of TCI states is used by the terminal to monitor at least one of the first PDCCH candidate and the second PDCCH candidate contained in the PDCCH, or the downlink TCI state in the set of TCI states is used by the terminal to monitor at least one of the first PDCCH candidate and the second PDCCH candidate contained in the PDCCH, and the first search space set SS set corresponding to the first PDCCH candidate and the second SS set corresponding to the second PDCCH candidate have a link relationship.

9. The method according to claim 8, characterized in that The second channel includes at least one of a PDCCH, a physical downlink shared channel PDSCH, a physical uplink control channel PUCCH, and a physical uplink shared channel PUSCH.

10. The method according to claim 9, characterized in that The first channel is used for transmission based on the N sets of TCI states in at least one transmission process.

11. The method according to claim 8, characterized in that A single set of TCI states includes the joint TCI state, where the joint TCI state is a TCI state applicable to both uplink and downlink channels / reference signals; Alternatively, the single set of TCI states includes at least one of the uplink TCI state and the downlink TCI state.

12. The method according to claim 8, characterized in that The first indication information includes a first media access layer control element MAC CE; Alternatively, the first indication information includes a second MAC CE and first downlink control information DCI.

13. The method according to claim 8, characterized in that In a case where the first channel is a downlink channel and the second channel is an uplink channel, at least one set of TCI states among the M sets of TCI states includes at least one of the uplink TCI state and the downlink TCI state.

14. The method according to claim 8, characterized in that The first SS Set is associated with a first control resource set CORESET, and the second SS Set is associated with a second CORESET. The first CORESET and the second CORESET are the same or different.

15. A device for indicating a transmission configuration indication (TCI) state, characterized in that: The device comprises: a first receiving module, configured to receive configuration information, wherein the configuration information is used to configure the first channel for transmission based on N sets of TCI states, and to configure the second channel for transmission based on one set of TCI states, where N is an integer greater than 1; The first receiving module is further configured to receive first indication information, where the first indication information is used to indicate M sets of TCI states, where M is a positive integer not greater than N; The apparatus is further configured to determine, based on the first indication information, at least one set of TCI states corresponding to at least one channel transmission from the M sets of TCI states, where channels corresponding to the at least one channel transmission include the first channel and the second channel; The device is also used to, when the first channel includes a physical downlink control channel PDCCH and M is equal to one, include a joint TCI state in the set of TCI states, or include a downlink TCI state or include the downlink TCI state and an uplink TCI state, monitor at least one of the first PDCCH candidate and the second PDCCH candidate contained in the PDCCH based on the joint TCI state in the set of TCI states; or monitor at least one of the first PDCCH candidate and the second PDCCH candidate contained in the PDCCH based on the downlink TCI state in the set of TCI states, and a first search space set SS set corresponding to the first PDCCH candidate and a second SS set corresponding to the second PDCCH candidate have a linked relationship.

16. A device for indicating a transmission configuration indication (TCI) state, characterized in that: The device comprises: a first sending module, configured to send configuration information to the terminal, wherein the configuration information is used to configure the first channel for transmission based on N sets of TCI states and to configure the second channel for transmission based on one set of TCI states, where N is an integer greater than 1; The first sending module is also used to send first indication information, and the first indication information is used to indicate M sets of TCI states, where M is a positive integer not greater than N; the first indication information is used by the terminal to determine at least one set of TCI states corresponding to at least one channel transmission from the M sets of TCI states, and the channels corresponding to the at least one channel transmission include the first channel and the second channel; when the first channel includes a physical downlink control channel PDCCH and M is equal to one, the set of TCI states includes a joint TCI state, or the set of TCI states includes a downlink TCI state or includes the downlink TCI state and an uplink TCI state; the joint TCI state in the set of TCI states is used by the terminal to monitor at least one of the first PDCCH candidate and the second PDCCH candidate contained in the PDCCH, or the downlink TCI state in the set of TCI states is used by the terminal to monitor at least one of the first PDCCH candidate and the second PDCCH candidate contained in the PDCCH, and the first search space set SS set corresponding to the first PDCCH candidate and the second SS set corresponding to the second PDCCH candidate have a link relationship.

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

18. A computer-readable storage medium, characterized in that The computer-readable storage medium stores at least one program, which is loaded and executed by the processor to implement the TCI status indication method as described in any one of claims 1 to 7, or to implement the TCI status indication method as described in any one of claims 8 to 14.

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