WO2022206489A1

WO2022206489A1 - Method and apparatus for determining transmission configuration indicator (tci) state, and terminal device

Info

Publication number: WO2022206489A1
Application number: PCT/CN2022/082267
Authority: WO
Inventors: 卢艺文; 黄秋萍; 苏昕; 高秋彬
Original assignee: 大唐移动通信设备有限公司
Priority date: 2021-04-01
Filing date: 2022-03-22
Publication date: 2022-10-06
Also published as: TWI795261B; TW202241106A; CN115189821A; CN115189821B

Abstract

The present disclosure provides a method and apparatus for determining a transmission configuration indicator (TCI) state, and a terminal device. The method comprises: receiving RRC signaling sent by a network device; before receiving activation information of an MAC-CE, determining, according to an SFN transmission mode corresponding to a PDSCH in the RRC signaling, a TCI state corresponding to the PDSCH, and determining, according to a target transmission mode corresponding to a PDCCH in the RRC signaling, a TCI state corresponding to the PDCCH; and when the activation information of the MAC-CE is received, and a time interval between the reception of DCI and the reception of a PDSCH scheduled by the DCI is less than a preset threshold, according to whether the RRC signaling carries a target enable parameter, and according to a CORESET selection rule and a TCI state selection rule, determining a TCI state corresponding to the PDSCH. By means of the present disclosure, correct reception of PDSCH and PDCCH data can be ensured.

Description

Method, device and terminal device for determining TCI status of transmission configuration indication

CROSS-REFERENCE TO RELATED APPLICATIONS

This disclosure claims the priority of a Chinese patent application with application number 202110358443.8 and entitled "Method, Apparatus and Terminal Equipment for Determining TCI Status of Transmission Configuration Indication" filed with the Chinese Patent Office on April 1, 2021, the entire contents of which are hereby incorporated by reference Incorporated in this disclosure.

technical field

The present disclosure relates to the field of mobile communication technologies, and in particular, to a method, an apparatus, and a terminal device for determining a TCI state of a transmission configuration indication.

Background technique

In Rel-16, when the time interval between receiving downlink control information (Downlink Control Information, DCI) and receiving its scheduled downlink shared channel (Physical Downlink Share Channel, PDSCH) is less than a threshold (Quasi co-location (QCL) ) duration), the terminal device has not yet decoded the DCI that schedules the PDSCH. At this time, it can be determined according to whether the RRC signaling received by the terminal device carries the target enable parameter (used to indicate that the two default TCI states are enabled) situation, to determine the default receive beam of the terminal device:

1. If the radio resource control (Radio Resource Control, RRC) signaling does not carry the target enable parameter, according to the current protocol, the terminal device can directly select the lowest index value (lowest ID) in the bandwidth part (Bandwidth Part, BWP). The Transmission Configuration Indicator (TCI) state of the Control Resource Set (CORESET) is used as the default receive beam of the terminal device.

2. If the RRC signaling carries the target enable parameter, according to the current protocol, the terminal device can directly select the TCI state in the codepoint of the lowest ID among the codepoints containing two TCI states as the two defaults of the terminal device. receive beam.

In Rel-16, the default receive beam problem of the downlink control channel (Physical Downlink Control Channel, PDCCH) mainly exists in the following two situations.

1. For the situation where the PDCCH is received before the RRC configuration, according to the current protocol, the terminal device can be based on the synchronization signal block (Synchronization Signal and PBCH block, SSB)/Channel State Information (Channel State Information, CSI) in the random access process- A reference signal (Reference Signal, RS) is used to determine the default receive beam of the PDCCH.

2. In view of the situation in which the PDCCH is received after the RRC configuration, but the Medium Access Control (MAC) control unit (Control Element, CE) has not activated the TCI state of the PDCCH for the time being, according to the current protocol, the terminal device can receive random access The SSB/CSI-RS in the incoming process is used to determine the default receive beam of the PDCCH.

In Rel-16, PDSCH supports the transmission mode of Space Division Multiplexing (SDM) 1a of Multiple Transmission and Reception Point (M-TRP), that is, all demodulation reference signals (Demodulation Reference Signals) of PDSCH. Reference Signal, DMRS) ports are configured in two code division multiplexing (Code Division Multiplexing, CDM) groups, and are indicated to include two TCI codepoints in TCI states, the first TCI state and the antenna indicated by the DCI scheduling the PDSCH The CDM group corresponding to the first antenna port in the ports is associated, and the second TCI state is associated with the CDM group corresponding to another DMRS port. In Rel-16, M-TRP transmission of PDCCH is not supported for the time being.

In view of the above situation, in Rel-17, a new PDCCH transmission scheme of M-TRP is proposed to be added, that is, the PDCCH transmission scheme of repeated transmission, in which the search space (Search Space, SS) set Set in the CORESET of two repeated transmissions can be The association configuration is performed through RRC configuration, and two CORESETs that include two SS sets associated with each other transmit the same DCI. Repeated transmission can transmit the same downlink control information through frequency division multiplexing (Frequency Division Multiplex, FDM) or through time division multiplexing (Time Division Multiplex, TDM).

In Rel-17, a new M-TRP PDSCH/PDCCH single frequency network (Single Frequency Network, SFN) transmission scheme is also proposed, in which the data layer of PDSCH/PDCCH and the channel of the DMRS port of PDSCH/PDCCH are associated with one The or more QCL reference signals have a QCL relationship with respect to at least one channel large-scale parameter. Therefore, the data layer of PDSCH/PDCCH and the DMRS port of PDSCH/PDCCH come from the transmission of multiple TRPs.

To sum up, for PDSCH, when the time interval between receiving DCI and receiving its scheduled PDSCH (corresponding to the SFN transmission mode) is less than the threshold (QCL duration), it can be used according to whether the RRC signaling received by the terminal device carries the target The enabling parameter (used to indicate that two default TCI states are enabled) are distinguished: if the RRC signaling does not carry the target enabling parameter, the receive beam at this time has only one TCI state. Then when the PDCCH is SFN transmission, the lowest ID CORESET of the PDCCH has 2 TCI states. Therefore, the default receiving beam of the PDSCH, that is, the TCI state of the PDSCH cannot be determined according to the existing rules. If the RRC signaling carries the target enable parameter, according to the existing rules, two TCI states are directly selected in the codepoint of the lowest ID after MAC-CE activation, instead of selecting the optimal TCI state, so the PDSCH cannot be accurately identified. The data is demodulated, and the performance is greatly reduced.

For the PDCCH, according to the current conclusion, the PDCCH intends to receive the SFN transmission scheme through the RRC configuration, but if the MAC-CE has not activated the TCI status of the PDCCH at this time, based on the existing determination method (using the SSB in the random access process) / CSI-RS TCI state), only one TCI state can be determined, but two TCI states of the PDCCH cannot be determined.

It can be seen that in the case where the PDSCH supports the SFN transmission mode and the PDCCH supports the SFN transmission mode or the non-SFN transmission mode, how to determine the TCI state becomes an urgent problem to be solved.

SUMMARY OF THE INVENTION

The embodiments of the present disclosure provide a method, an apparatus, and a terminal device for determining a TCI state of a transmission configuration indication, so as to solve the problem in the prior art when the PDSCH supports the SFN transmission mode, and the PDCCH supports the SFN transmission mode or the non-SFN transmission mode. The question of TCI status.

In a first aspect, an embodiment of the present disclosure provides a method for determining a TCI state of a transmission configuration indication, which is applied to a terminal device, including:

Receive the radio resource control RRC signaling sent by the network device, where the RRC signaling carries the CORESET configuration of M control resource sets, the single frequency network SFN transmission mode corresponding to the downlink shared channel PDSCH, and the target transmission mode corresponding to the downlink control channel PDCCH. The CORESET configuration includes time-frequency resource locations and N TCI state index values, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1 and less than or equal to 128;

Before receiving the activation information of the medium access control MAC-control element CE sent by the network device, determine the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, and determine the TCI state corresponding to the PDSCH according to the target transmission mode corresponding to the PDCCH determining the TCI state corresponding to the PDCCH;

When the activation information of the MAC-CE is received and the time interval between receiving the downlink control information DCI and receiving the PDSCH scheduled by the MAC-CE is less than the preset threshold, CORESET is selected according to whether the RRC signaling carries the target enable parameter or not. Rules and TCI state selection rules to determine the TCI state corresponding to the PDSCH;

The target enable parameter is used to indicate that two default TCI states are enabled, the preset threshold is quasi-co-located QCL duration, and the terminal device determines M CORESETs according to the M time-frequency resource positions, each The TCI state index value corresponds to a TCI state, and each CORESET includes at least one TCI state.

Optionally, the RRC signaling also carries a PDSCH configuration, and the PDSCH configuration includes N TCI state index values;

The determining the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH includes:

When the PDSCH is in the SFN transmission mode and N is greater than or equal to 2, the TCI states corresponding to the first two TCI state index values in the N TCI state index values are determined as the two TCIs corresponding to the PDSCH state;

In the case that the PDSCH is the SFN transmission mode and the value of N is 1, the TCI state of the synchronization signal block SSB/channel state information CSI-reference signal RS during random access is determined as a TCI corresponding to the PDSCH state.

Optionally, after determining the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, the method further includes:

When N is greater than or equal to 2, receive two default beams sent by the network device through the two TCI states corresponding to the PDSCH respectively;

When the value of N is 1, a default beam sent by the network device is received through a TCI state corresponding to the PDSCH.

Optionally, the determining the TCI state corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH includes:

When the target transmission mode corresponding to the PDCCH is a non-SFN transmission mode, the TCI state of the synchronization signal block SSB/channel state information CSI-reference signal RS during random access is determined as a TCI state corresponding to the PDCCH ;

When the target transmission mode corresponding to the PDCCH is the SFN transmission mode, for each CORESET configuration including a TCI state index value, the TCI state of the SSB/CSI-RS during random access is determined to be the same as the current CORESET configuration The TCI state corresponding to the corresponding CORESET, for each CORESET configuration including at least two TCI state index values, determine the TCI state corresponding to the first two TCI state index values in the current CORESET configuration as the CORESET corresponding to the current CORESET configuration The corresponding TCI state, the TCI state corresponding to the PDCCH includes the TCI state corresponding to each CORESET.

Optionally, after the TCI state corresponding to the PDCCH is determined according to the target transmission mode corresponding to the PDCCH, the method further includes:

In the case that the PDCCH is a non-SFN transmission mode, receiving a default beam sent by the network device through a TCI state corresponding to the PDCCH;

When the PDCCH is the SFN transmission mode, for each CORESET, one or two default beams sent by the network device are received through the corresponding TCI state.

Optionally, determining the TCI state corresponding to the PDSCH according to whether the RRC signaling carries the target enable parameter, the CORESET selection rule and the TCI state selection rule, including:

Determine K CORESETs corresponding to the target bandwidth part BWP from the M CORESETs, where the target BWP is the BWP corresponding to the terminal device, and K is an integer greater than or equal to 1 and less than or equal to 3;

After the K CORESETs are determined, L reference CORESETs are determined according to the preset strategy, where L is an integer greater than or equal to 1 and less than or equal to K;

When the target enable parameter is not carried in the RRC signaling, according to the first CORESET selection rule and the first TCI state selection rule, determine the TCI corresponding to the PDSCH in the TCI states corresponding to the L reference CORESETs state;

When the target enable parameter is carried in the RRC signaling, according to the second CORESET selection rule and the second TCI state selection rule, determine the TCI state corresponding to the PDSCH among the TCI states corresponding to the L reference CORESETs .

Optionally, the CORESET configuration also includes the CORESET index value and the association between the search space set SS Set in the current CORESET and the SS Set in other CORESETs;

The L reference CORESETs are determined according to the preset strategy, including:

Detecting whether there is a first CORESET in the K CORESETs, where the first CORESET includes two TCI states;

In the presence of the first CORESET, determine that the first CORESET is the reference CORESET, and the number of the first CORESET is greater than or equal to 1 and less than or equal to K;

In the absence of the first CORESET, detect whether there are two second CORESETs associated with the SS set at the same moment in the K CORESETs;

In the presence of two of the second CORESETs, determining that the two second CORESETs are two of the reference CORESETs, and the second CORESETs include one TCI state;

In the case where there are no two second CORESETs, it is detected whether there is a third CORESET in the K CORESETs, the SS Set in the third CORESET and the P CORESETs corresponding to the target BWP at another moment. The SS Set in the fourth CORESET forms an association, and P is an integer greater than or equal to 1 and less than or equal to 3;

In the presence of the third CORESET, it is determined that the third CORESET and the fourth CORESET are two of the reference CORESETs, and each of the third CORESET and the fourth CORESET includes one TCI state.

Optionally, determining the TCI state corresponding to the PDSCH in the TCI states corresponding to the L reference CORESETs according to the first CORESET selection rule and the first TCI state selection rule, including:

According to the CORESET index value corresponding to each of the reference CORESETs, a first target CORESET is selected from the L reference CORESETs, and a TCI state is selected from the first target CORESET to determine the TCI corresponding to the PDSCH state.

Optionally, in the case that the first CORESET is the reference CORESET;

According to the CORESET index value corresponding to each of the reference CORESETs, a first target CORESET is selected from the L reference CORESETs, and a TCI state is selected from the first target CORESET to determine that the PDSCH corresponds to the TCI status, including:

determining the first CORESET corresponding to the lowest CORESET index value among the L first CORESETs as the first target CORESET;

Determine the first TCI state or the second TCI state in the first target CORESET as the TCI state corresponding to the PDSCH.

Optionally, in the case that two of the second CORESETs are two of the reference CORESETs;

Determining the second CORESET corresponding to the lowest CORESET index value in the two second CORESETs as the first target CORESET, and determining the TCI state in the first target CORESET as the TCI state corresponding to the PDSCH .

Optionally, in the case that the third CORESET and the fourth CORESET are two of the reference CORESETs;

Determining the CORESET corresponding to the lowest CORESET index value in the third CORESET and the fourth CORESET as the first target CORESET, and determining the TCI state in the first target CORESET as the TCI state corresponding to the PDSCH .

Optionally, determining the TCI state corresponding to the PDSCH in the TCI states corresponding to the L reference CORESETs according to the second CORESET selection rule and the second TCI state selection rule, including:

In the case that the reference CORESET is the first CORESET, a second target CORESET is selected from the L reference CORESETs according to the CORESET index value corresponding to each of the reference CORESETs, and the second target CORESET is The two TCI states in are determined to be the TCI states corresponding to the PDSCH;

When the reference CORESET is the second CORESET or the reference CORESET is the third CORESET and the fourth CORESET, the two reference CORESETs are determined as two second CORESETs according to the SS set association principle The target CORESET combines the TCI states in the two second target CORESETs, and determines the combined two TCI states as the TCI states corresponding to the PDSCH.

Optionally, selecting a second target CORESET from the L reference CORESETs according to the CORESET index value corresponding to each of the reference CORESETs, including;

The reference CORESET corresponding to the lowest CORESET index value among the L reference CORESETs is determined as the second target CORESET.

Optionally, after receiving the activation information of the MAC-CE and determining the TCI state corresponding to the PDSCH, the method further includes:

Receive a default beam sent by the network device within the time interval by using the determined TCI state corresponding to the PDSCH; or

The two default beams sent by the network device are respectively received within the time interval by using the determined two TCI states corresponding to the PDSCH.

In a second aspect, an embodiment of the present disclosure further provides a terminal device, including a memory, a transceiver, and a processor;

The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

Control the transceiver to receive the radio resource control RRC signaling sent by the network device, the RRC signaling carries the CORESET configuration of M control resource sets, the single frequency network SFN transmission mode corresponding to the downlink shared channel PDSCH, and the downlink control channel PDCCH. Target transmission mode, the CORESET configuration includes time-frequency resource locations and N TCI state index values, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1 and less than or equal to 128;

Before the transceiver receives the activation information of the medium access control MAC-control element CE sent by the network device, the transceiver determines the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, and determines the TCI state corresponding to the PDSCH according to the corresponding SFN transmission mode of the PDSCH. The target transmission mode determines the TCI state corresponding to the PDCCH;

When the transceiver receives the activation information of the MAC-CE and the time interval between receiving the downlink control information DCI and receiving the PDSCH scheduled by the transceiver is less than a preset threshold, according to whether the RRC signaling carries the target enable parameter situation, CORESET selection rule and TCI state selection rule, determine the TCI state corresponding to the PDSCH;

Optionally, the RRC signaling also carries a PDSCH configuration, and the PDSCH configuration includes N TCI state index values; the processor is further configured to perform the following operations:

Optionally, after determining the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, the processor is further configured to perform the following operations:

When N is greater than or equal to 2, controlling the transceiver to receive the two default beams sent by the network device through the two TCI states corresponding to the PDSCH respectively;

When the value of N is 1, the transceiver is controlled to receive a default beam sent by the network device through a TCI state corresponding to the PDSCH.

Optionally, the processor is further configured to perform the following operations:

Optionally, after the TCI state corresponding to the PDCCH is determined according to the target transmission mode corresponding to the PDCCH, the processor is further configured to perform the following operations:

In the case that the PDCCH is a non-SFN transmission mode, controlling the transceiver to receive a default beam sent by the network device through a TCI state corresponding to the PDCCH;

When the PDCCH is the SFN transmission mode, for each CORESET, the transceiver is controlled to receive one or two default beams sent by the network device through the corresponding TCI state.

The processor is also configured to perform the following operations:

Optionally, in the case that the first CORESET is the reference CORESET;

The processor is also configured to perform the following operations:

Optionally, after the transceiver receives the activation information of the MAC-CE and the processor determines the TCI state corresponding to the PDSCH, the processor is further configured to perform the following operations:

Controlling the transceiver to receive a default beam sent by the network device within the time interval through a determined TCI state corresponding to the PDSCH; or

The transceiver is controlled to respectively receive two default beams sent by the network device within the time interval through the determined two TCI states corresponding to the PDSCH.

In a third aspect, an embodiment of the present disclosure further provides an apparatus for determining a TCI state of a transmission configuration indication, which is applied to a terminal device, including:

The first receiving module is used to receive the radio resource control RRC signaling sent by the network device, where the RRC signaling carries the CORESET configuration of M control resource sets, the single frequency network SFN transmission mode corresponding to the downlink shared channel PDSCH, and the downlink control channel PDCCH The corresponding target transmission mode, the CORESET configuration includes time-frequency resource locations and N TCI state index values, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1 and less than or equal to 128;

The first determining module is configured to determine the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH before receiving the activation information of the medium access control MAC-control element CE sent by the network device, and according to the The target transmission mode corresponding to the PDCCH determines the TCI state corresponding to the PDCCH;

The second determination module is configured to, when the activation information of the MAC-CE is received and the time interval between receiving the downlink control information DCI and receiving the PDSCH scheduled by the MAC-CE is less than a preset threshold, according to whether the RRC signaling carries the target command The condition of the parameters, the CORESET selection rule and the TCI state selection rule, determine the TCI state corresponding to the PDSCH;

In a fourth aspect, an embodiment of the present disclosure provides a processor-readable storage medium, where a computer program is stored on the processor-readable storage medium, and when the computer program is executed by a processor, the transmission described in the first aspect above is implemented Configure the determination method to indicate the TCI status.

In a fifth aspect, an embodiment of the present disclosure provides a computer program, including computer-readable codes, which, when the computer-readable codes are executed on a computing and processing device, cause the computing and processing device to execute the above-mentioned first aspect. The transport configuration indicates the method for determining the TCI status.

In a sixth aspect, an embodiment of the present disclosure provides a computer-readable medium, in which the computer program described in the fifth aspect is stored.

In the embodiment of the present disclosure, when the PDSCH is SFN transmission, before receiving the activation information of the MAC-CE, the TCI status of the PDSCH can be determined according to the PDSCH configuration, and the TCI status of the PDCCH can be determined according to different transmission modes of the PDCCH. - After the activation information of the CE, the TCI state of the PDSCH can be dynamically determined according to whether the terminal device receives the target enable parameter, so as to ensure the correct reception of the PDSCH and PDCCH data.

The above description is only an overview of the technical solutions of the present disclosure. In order to understand the technical means of the present disclosure more clearly, it can be implemented according to the contents of the description, and in order to make the above-mentioned and other purposes, features and advantages of the present disclosure more obvious and easy to understand , the following specific embodiments of the present disclosure are given.

Description of drawings

In order to describe the technical solutions in the embodiments of the present disclosure or related technologies more clearly, the following briefly introduces the accompanying drawings that need to be used in the descriptions of the embodiments of the present disclosure or related technologies. Obviously, the drawings in the following description are the For the disclosed embodiments, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 shows a schematic diagram of a method for determining a TCI state of a transmission configuration indication according to an embodiment of the present disclosure;

Fig. 2a shows the schematic diagram 1 of the corresponding CORESET in the target BWP according to the embodiment of the present disclosure;

Fig. 2b shows the second schematic diagram of the CORESET corresponding to the target BWP according to the embodiment of the present disclosure;

FIG. 3 is a schematic diagram showing that the corresponding CORESETs in the target BWP of the embodiment of the present disclosure form SS Set associations at the same time;

FIG. 4 shows one of the schematic diagrams of forming SS Set associations at different times between the corresponding CORESETs in the target BWP according to the embodiment of the present disclosure;

FIG. 5 shows the second schematic diagram of the formation of SS Set associations between the corresponding CORESETs in the target BWP of the embodiment of the present disclosure at different times;

Fig. 6 shows the schematic diagram of forming SS Set associations at different times and at the same time corresponding to CORESETs in the target BWP according to the embodiment of the present disclosure;

7 is a schematic diagram of an apparatus for determining a TCI state of a transmission configuration indication according to an embodiment of the present disclosure;

FIG. 8 shows a structural block diagram of a terminal device according to an embodiment of the present disclosure;

Figure 9 schematically shows a block diagram of a computing processing device for performing methods according to the present disclosure;

Figure 10 schematically shows a memory unit for holding or carrying program code implementing the method according to the present disclosure.

specific embodiment

In order to make the purposes, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments These are some, but not all, embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

In the embodiments of the present disclosure, the term "and/or" describes the association relationship of associated objects, and indicates that there can be three kinds of relationships. For example, A and/or B can indicate that A exists alone, A and B exist at the same time, and B exists alone these three situations. The character "/" generally indicates that the associated objects are an "or" relationship.

In the embodiments of the present disclosure, the term "plurality" refers to two or more than two, and other quantifiers are similar.

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

Embodiments of the present disclosure provide a method and apparatus for determining the TCI state of a transmission configuration indication, so as to realize the determination of the TCI state of the PDSCH according to the SFN transmission mode of the PDSCH and the target transmission mode of the PDCCH before receiving the activation information of the MAC-CE To determine the TCI status of the PDCCH, after receiving the activation information of the MAC-CE, the TCI status of the PDSCH can be dynamically determined according to whether the terminal device receives the target enable parameter, so as to ensure the correct reception of PDSCH and PDCCH data.

The method and the device are conceived based on the same application. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and repeated descriptions will not be repeated here.

In addition, the technical solutions provided by the embodiments of the present disclosure can be applied to various systems, especially 5G systems. For example, the applicable system may be a global system of mobile communication (GSM) system, a code division multiple access (CDMA) system, a wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) general packet Wireless service (general packet radio service, GPRS) system, long term evolution (long term evolution, LTE) system, LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD) system, Long term evolution advanced (LTE-A) system, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) system, 5G New Radio (New Radio, NR) system, etc. These various systems include terminal equipment and network equipment. The system may also include a core network part, such as an evolved packet system (Evloved Packet System, EPS), a 5G system (5GS), and the like.

The terminal device involved in the embodiments of the present disclosure may be a device that provides voice and/or data connectivity to a user, a handheld device with a wireless connection function, or other processing device connected to a wireless modem. In different systems, the name of the user equipment may be different. For example, in the 5G system, the terminal equipment may be called user equipment. Wireless terminal equipment can communicate with one or more core networks (Core Network, CN) via a radio access network (Radio Access Network, RAN). "telephone) and computers with mobile terminal equipment, eg portable, pocket-sized, hand-held, computer-built or vehicle-mounted mobile devices, which exchange language and/or data with the radio access network. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (Personal Digital Assistants), PDA) and other devices. Wireless terminal equipment may also be referred to as system, subscriber unit, subscriber station, mobile station, mobile station, remote station, access point , a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in the embodiments of the present disclosure.

The network device involved in the embodiments of the present disclosure may be a base station, and the base station may include a plurality of cells providing services for the terminal. Depending on the specific application, the base station may also be called an access point, or may be a device in the access network that communicates with wireless terminal equipment through one or more sectors on the air interface, or other names. The network device can be used to exchange received air frames with Internet Protocol (IP) packets, and act as a router between the wireless terminal device and the rest of the access network, which can include the Internet. Protocol (IP) communication network. The network devices may also coordinate attribute management for the air interface. For example, the network device involved in the embodiments of the present disclosure may be a network device (Base Transceiver Station, BTS) in the Global System for Mobile Communications (GSM) or Code Division Multiple Access (Code Division Multiple Access, CDMA). ), it can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), or it can be an evolved network device in a long term evolution (LTE) system (evolutional Node B, eNB or e-NodeB), 5G base station (gNB) in 5G network architecture (next generation system), or Home evolved Node B (HeNB), relay node (relay node) , a home base station (femto), a pico base station (pico), etc., which are not limited in the embodiments of the present disclosure. In some network structures, a network device may include a centralized unit (CU) node and a distributed unit (DU) node, and the centralized unit and the distributed unit may also be geographically separated.

One or more antennas can be used between the network device and the terminal device for multi-input multi-output (MIMO) transmission. The MIMO transmission can be single-user MIMO (Single User MIMO, SU-MIMO) or multi-user MIMO. (Multiple User MIMO, MU-MIMO). According to the form and number of root antenna combinations, MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO, or massive-MIMO, or diversity transmission, precoding transmission, or beamforming transmission.

The following describes a method for determining a TCI state of a transmission configuration indication applied to a terminal device provided by an embodiment of the present disclosure. Referring to FIG. 1 , the method includes:

Step 101: Receive the radio resource control RRC signaling sent by the network device, where the RRC signaling carries the CORESET configuration of M control resource sets, the single frequency network SFN transmission mode corresponding to the downlink shared channel PDSCH, and the target transmission corresponding to the downlink control channel PDCCH. The CORESET configuration includes time-frequency resource locations and N TCI state index values, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1 and less than or equal to 128.

The terminal device receives the RRC signaling sent by the network device, where the RRC signaling carries M (M is a positive integer, the minimum value is 1) CORESET configurations (configurations corresponding to a certain moment), the SFN transmission mode corresponding to the PDSCH, and the PDCCH. The corresponding target transmission mode, the target transmission mode corresponding to the PDCCH may be SFN transmission or non-SFN transmission. For each CORESET configuration, it can include the time-frequency resource location and N TCI state index values. The value of N can be different.

Step 102: Before receiving the activation information of the medium access control MAC-control element CE sent by the network device, determine the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, and determine the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH. The target transmission mode determines the TCI state corresponding to the PDCCH.

Before receiving the MAC-CE activation information sent by the network device, the terminal device can determine the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH carried in the RRC signaling, and according to the target transmission corresponding to the PDCCH carried in the RRC signaling. way to determine the TCI state corresponding to the PDCCH. The target transmission mode corresponding to the PDCCH may be SFN transmission or non-SFN transmission, and for different transmission modes, the methods for determining the TCI state corresponding to the PDCCH are also different.

Step 103: When the activation information of the MAC-CE is received and the time interval between receiving the downlink control information DCI and receiving its scheduled PDSCH is less than a preset threshold, according to whether the RRC signaling carries the target enable parameter. , CORESET selection rule and TCI state selection rule to determine the TCI state corresponding to the PDSCH.

After receiving the RRC signaling, the terminal device may determine the corresponding CORESETs according to the time-frequency resource positions in the CORESET configuration, that is, may determine the corresponding M CORESETs according to the M time-frequency resource positions. Since the CORESET configuration includes N TCI state index values, and each TCI state index value corresponds to a TCI state, each CORESET may include at least one TCI state.

When the activation information of the MAC-CE is received and the time interval between receiving the DCI and receiving its scheduled PDSCH is less than the preset threshold (quasi-co-location duration), it can be determined according to whether the terminal device receives the target enable parameter, CORESET selection rule and The TCI state selection rule determines the TCI state corresponding to the PDSCH. That is, when the terminal device receives the target enable parameter and when it does not receive the target enable parameter, the method of determining the TCI state corresponding to the PDSCH is also different. When determining the TCI state corresponding to the PDSCH according to the CORESET selection rule and the TCI state selection rule , the CORESET may be first determined according to the CORESET selection rule, and then the TCI state may be determined according to the TCI state selection rule.

In the above implementation process of the present disclosure, when the PDSCH is SFN transmission, before receiving the activation information of the MAC-CE, the TCI status of the PDSCH can be determined according to the PDSCH configuration, and the TCI status of the PDCCH can be determined according to different transmission modes of the PDCCH. After the activation information of the CE, the TCI state of the PDSCH can be dynamically determined according to whether the terminal device receives the target enable parameter, so as to ensure the correct reception of the PDSCH and PDCCH data.

The following describes the case of determining the TCI state corresponding to the PDSCH before receiving the activation information of the MAC-CE. In this embodiment, the RRC signaling also carries the PDSCH configuration, and the PDSCH configuration includes N TCI state indexes value;

In this embodiment, the RRC signaling also carries the PDSCH configuration, where the PDSCH configuration includes N TCI state index values, and the value of N ranges from 1 to 128. When determining the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, different schemes may be adopted for different values of N.

When the PDSCH is the SFN transmission mode and N is greater than or equal to 2, the TCI states corresponding to the first two TCI state index values may be determined as the two TCI states corresponding to the PDSCH for the N TCI state index values. When the PDSCH is the SFN transmission mode and the value of N is 1, the TCI state of the SSB/CSI-RS during random access can be determined as a TCI state corresponding to the PDSCH, that is, only one TCI state is determined at this time .

After determining the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, the method further includes:

After the TCI state corresponding to the PDSCH is determined, the default beam sent by the network device may be received according to the determined TCI state. Because before the PDSCH corresponds to SFN transmission and the terminal device receives the activation information of the MAC-CE, one or two TCI states corresponding to the PDSCH can be determined according to the different values of N in the PDSCH configuration. The case of receiving the default beam is distinguished.

When the value of N is greater than or equal to 2, since the two TCI states corresponding to the PDSCH can be determined, the two default beams sent by the network device can be respectively received through the two TCI states corresponding to the PDSCH; the value of N is 1 In the case of , since a TCI state corresponding to the PDSCH can be determined, a default beam sent by the network device can be received through a TCI state corresponding to the PDSCH.

The above embodiment of the present disclosure is an implementation process of determining the TCI state corresponding to the PDSCH and receiving the default beam sent by the network device before receiving the activation information of the MAC-CE. The PDSCH is determined in a corresponding manner according to different values of N in the PDSCH configuration. The corresponding TCI state, and then adopting the determined TCI state to receive the default beam sent by the network device can ensure correct reception of PDSCH data.

The following describes the case of determining the TCI state corresponding to the PDCCH before receiving the activation information of the MAC-CE. In this embodiment, the determining the TCI state corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH includes: :

Before receiving the activation information of the MAC-CE, when determining the TCI state corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH, you can first determine whether the target transmission mode corresponding to the PDCCH is the SFN transmission mode, if the target transmission mode corresponding to the PDCCH is non-SFN transmission, the TCI state of the SSB/CSI-RS during random access may be directly determined as a TCI state corresponding to the PDCCH.

If the target transmission mode corresponding to the PDCCH is SFN transmission, for M CORESET configurations, a CORESET configuration including one TCI state index value is determined, and a CORESET configuration including at least two TCI state index values is determined. For each CORESET configuration, the TCI state of the SSB/CSI-RS during random access can be determined as the TCI state corresponding to the CORESET corresponding to the current CORESET configuration. For each CORESET configuration including at least two TCI state index values, set the The TCI states corresponding to the first two TCI state index values in the current CORESET configuration respectively are determined as the TCI states corresponding to the CORESET corresponding to the current CORESET configuration. For the PDCCH, the TCI state corresponding to the PDCCH includes the TCI state corresponding to each CORESET in the M CORESETs.

After the TCI state corresponding to the PDCCH is determined according to the target transmission mode corresponding to the PDCCH, the method further includes:

After the TCI state corresponding to the PDCCH is determined, the default beam sent by the network device may be received according to the determined TCI state. Before the terminal device receives the activation information of the MAC-CE, the TCI states determined according to the different transmission modes corresponding to the PDCCH are different, so it is necessary to distinguish the reception default beam according to the different transmission modes corresponding to the PDCCH.

When the PDCCH is a non-SFN transmission mode, a default beam sent by the network device can be received through a TCI state corresponding to the PDCCH; when the PDCCH is the SFN transmission mode, each CORESET can correspond to one or two TCIs Status, for each CORESET, receive one or two default beams sent by the network device through the corresponding TCI status.

The above embodiment of the present disclosure is an implementation process of determining the TCI state corresponding to the PDCCH and receiving the default beam sent by the network device before receiving the activation information of the MAC-CE, determining the TCI state corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH, and then using The determined TCI state receives the default beam sent by the network device, which can ensure correct reception of PDCCH data.

The following describes the case of determining the TCI state corresponding to the PDSCH after receiving the activation information of the MAC-CE. In this embodiment, determining the TCI state corresponding to the PDSCH according to whether the RRC signaling carries the target enable parameter, the CORESET selection rule and the TCI state selection rule, includes:

After receiving the activation information of the MAC-CE, determine the TCI corresponding to PDSCH according to whether the terminal device receives the target enable parameter (that is, whether the RRC signaling carries the target enable parameter), the CORESET selection rule and the TCI state selection rule In the state, the K CORESETs corresponding to the target BWP can be determined from the M CORESETs according to the target BWP corresponding to the terminal device. Among them, since 1 BWP corresponds to 3 CORESETs at most, the maximum value of K is 3. Since M The minimum value of 1 is 1, so the minimum value of K is 1. Wherein, after the activation of the MAC-CE, that is, after receiving the activation information of the MAC-CE, each CORESET may include at most two TCI states.

After K CORESETs are determined from the M CORESETs, L reference CORESETs may be determined according to a preset strategy, where L is an integer greater than or equal to 1 and less than or equal to K, at least one reference CORESET and at most 3 reference CORESETs may be determined.

After the L reference CORESETs are determined, different strategies may be adopted to determine the TCI state corresponding to the PDSCH among the TCI states corresponding to the L reference CORESETs according to whether the RRC signaling carries the target enable parameter. That is, when the RRC signaling does not carry the target enable parameter, according to the first CORESET selection rule and the first TCI state selection rule, the TCI state corresponding to the PDSCH is determined among the TCI states corresponding to the L reference CORESETs; in the RRC signaling When the target enabling parameter is carried in the TCI, the TCI state corresponding to the PDSCH is determined among the TCI states corresponding to the L reference CORESETs according to the second CORESET selection rule and the second TCI state selection rule.

In the above process of the present disclosure, by determining K CORESETs corresponding to the target BWP among the M CORESETs, filtering out L reference CORESETs based on a preset strategy, and adopting different strategies according to whether the terminal device receives the target enabling parameters Determining the TCI state corresponding to the PDSCH among the L reference TCI states corresponding to the CORESET can ensure correct reception of the PDSCH data.

The following describes the case where L reference CORESETs are determined according to the preset strategy. In this embodiment, the CORESET configuration further includes the CORESET index value and the association between the search space set SSSet in the current CORESET and the SS Set in other CORESETs;

In the case where there are two second CORESETs, it is determined that the two second CORESETs are the two reference CORESETs, the second CORESETs include one TCI state, and the two second CORESETs include different TCI states ;

In the presence of the third CORESET, it is determined that the third CORESET and the fourth CORESET are two of the reference CORESETs, the third CORESET and the fourth CORESET each include one TCI state, and the third CORESET The third CORESET and the fourth CORESET include different TCI states.

For each CORESET configuration, the CORESET index value and the association between the SS Set in the current CORESET and the SS Set in other CORESETs may also be included.

When the L reference CORESETs are determined, the following detection sequence may be performed to determine the L reference CORESETs: first, check whether there is a first CORESET including two TCI states in the K CORESETs, and if so, determine the first CORESET as a reference CORESET, at this time, the minimum number of the first CORESET is 1 and the maximum is K, that is, the minimum value of the reference CORESET is 1 and the maximum is K.

If it does not exist, it is detected whether there are two second CORESETs associated with the SS set at the same time in the K CORESETs. If there are, the second CORESET is determined as the reference CORESET. At this time, the number of the second CORESET is 2, that is, With reference to the value of the CORESET being 2, each second CORESET includes one TCI state, and the two second CORESETs correspond to different TCI states.

If it does not exist, check whether there is a third CORESET in the K CORESETs. The SS Set in the third CORESET forms an association with the SS Set in the fourth CORESET in the P CORESETs corresponding to the target BWP at another moment, and P is greater than or An integer equal to 1, less than or equal to 3, and the values of P and K may be equal or unequal. If present, the third CORESET and the fourth CORESET are determined to be two reference CORESETs, that is, the number of reference CORESETs is two. Wherein, both the third CORESET and the fourth CORESET include one TCI state, and the third CORESET and the fourth CORESET correspond to different TCI states. That is, the two CORESETs that form an SS Set association correspond to different TCI states.

The above process is to first detect whether there is a first CORESET in the K CORESETs, if not, detect whether there are two second CORESETs in the K CORESETs, if not, detect whether there is a third CORESET in the K CORESETs. Through the above detection, L reference CORESETs can be determined. When the first CORESET exists in the K CORESETs, the number of reference CORESETs ranges from 1 to K. When the first CORESET does not exist and the second CORESET exists in the K CORESETs, the reference The value of the number of CORESETs is 2, and in the case that the first CORESET and the second CORESET do not exist in the K CORESETs, and the third CORESET exists, the value of the reference CORESET number is 2. In this embodiment, the priorities of the first CORESET, the second CORESET and the third CORESET are sequentially decreased.

In the above implementation process of the present disclosure, by performing detection in a specific order, the first CORESET can be preferentially determined as the reference CORESET, and when the first CORESET does not exist in the K CORESETs, the second CORESET can be determined as the reference CORESET. When the second CORESET does not exist in the CORESET, the third CORESET and the fourth CORESET may be determined as the reference CORESET, so that the reference CORESET is determined according to the priority.

The following describes the process of determining the TCI state corresponding to the PDSCH in the case where the terminal device supports a default PDSCH receiving beam within a time interval after receiving the activation information of the MAC-CE. In this embodiment, determining the TCI state corresponding to the PDSCH among the TCI states corresponding to the L reference CORESETs according to the first CORESET selection rule and the first TCI state selection rule includes:

Since each CORESET configuration may further include a CORESET index value, when determining the TCI state corresponding to the PDSCH among the TCI states corresponding to the L reference CORESETs according to the first CORESET selection rule and the first TCI state selection rule, you can first determine the TCI state corresponding to the PDSCH according to each Referring to the CORESET index values corresponding to the CORESETs, a first target CORESET is selected from the L reference CORESETs, and then for the first target CORESET, a TCI state is selected in the first target CORESET to determine the TCI state corresponding to the PDSCH. That is, the CORESET is first filtered based on the CORESET index value, and then, for the filtered CORESET, the TCI state corresponding to the PDSCH is determined according to the TCI state corresponding to the CORESET.

In the above implementation process of the present disclosure, the first target CORESET can be accurately determined by screening the L reference CORESETs based on the CORESET index value, and then the TCI state corresponding to the PDSCH can be quickly determined on the basis of the first target CORESET.

Among them, since the reference CORESET may be the first CORESET, the reference CORESET may also be the second CORESET, and the reference CORESET may also be the third CORESET and the fourth CORESET, for different situations of the reference CORESET, the way to determine the TCI state corresponding to the PDSCH is as follows: The following describes the process of determining the TCI state corresponding to the PDSCH for the case where the reference CORESET is a different CORESET.

In the case that the first CORESET is the reference CORESET, selecting a first target CORESET from the L reference CORESETs according to the CORESET index value corresponding to each of the reference CORESETs, and selecting a first target CORESET in the reference CORESET. In the first target CORESET, a TCI state is selected and determined as the TCI state corresponding to the PDSCH, including:

If the first CORESET is the reference CORESET, when the first target CORESET is determined and the TCI state corresponding to the PDSCH is determined, for the L reference CORESETs, according to the CORESET index value, among the L reference CORESETs, the one corresponding to the lowest CORESET index value may be selected. For the first CORESET, the selected first CORESET is determined as the first target CORESET. Since the first CORESET includes two TCI states, when determining the TCI state corresponding to the PDSCH, any one of the two TCI states in the first target CORESET may be determined as the TCI state corresponding to the PDSCH, that is, the first The first TCI state in the target CORESET (the TCI state with a relatively high TCI state index value) is determined as the TCI state corresponding to the PDSCH, or the second TCI state in the first target CORESET (the TCI state index value is relatively high) is determined as the TCI state corresponding to the PDSCH. The subsequent TCI state) is determined as the TCI state corresponding to the PDSCH.

In the following, for the case where the terminal device does not receive the target enable parameter (the RRC signaling does not carry the target enable parameter), a specific example is used to determine the TCI state corresponding to the PDSCH and the PDCCH before receiving the activation information of the MAC-CE, receive the MAC-CE The process of determining the TCI state corresponding to the PDSCH after the activation information of the CE will be described.

The terminal device receives the RRC signaling sent by the network device, wherein the RRC signaling carries M CORESET configurations, the SFN transmission mode corresponding to the PDSCH, the SFN transmission mode corresponding to the PDCCH, and the PDSCH configuration.

Before the terminal device receives the activation information of the MAC-CE, the TCI states corresponding to the first two TCI state index values in the N (values 2 to 128) TCI state index values in the PDSCH configuration are determined as the TCI states corresponding to the PDSCH. Two TCI states. For the PDCCH, for each CORESET configuration including one TCI state index value, the TCI state of the SSB/CSI-RS during random access is determined as the TCI state corresponding to the CORESET corresponding to the current CORESET configuration. For each CORESET configuration of the two TCI state index values, determine the TCI states corresponding to the first two TCI state index values in the current CORESET configuration as the TCI state corresponding to the CORESET corresponding to the current CORESET configuration, and the TCI state corresponding to the PDCCH includes: The TCI status corresponding to each CORESET.

After the terminal device receives the activation information of the MAC-CE, when the time interval between receiving the DCI and receiving its scheduled PDSCH is less than the preset threshold, it determines 3 CORESETs corresponding to the target BWP among the M CORESETs. Referring to Figure 2a, when the three CORESETs (CORESET#0, CORESET#1, and CORESET#2) all include two TCI states, select the CORESET (CORESET#0) with the lowest CORESET index value, and place the selected CORESET in the The first TCI state (TCI state #0) or the second TCI state (TCI state #1) is determined as a TCI state corresponding to the PDSCH. Or, as shown in Figure 2b, among the three CORESETs (CORESET#0, CORESET#1, and CORESET#2), only the CORESET with the lowest CORESET index value (CORESET#0) includes two TCI states, and the remaining CORESETs (CORESET# 1 and CORESET#2) both include one TCI state, then the CORESET#0 including two TCI states is determined as the first target CORESET, and the first TCI state (TCI state #0) or the second target CORESET in CORESET#0 is determined. One TCI state (TCI state #1) is determined as one TCI state corresponding to the PDSCH. Of course, the corresponding TCI states in the three CORESETs may also be other situations, which will not be listed and described here. When the first CORESET is the reference CORESET, there may be other implementation situations for determining the TCI states corresponding to the PDCCH and PDSCH, which are not listed here.

In the above implementation process of the present disclosure, by selecting the first CORESET with the lowest index value among the L first CORESETs as the first target CORESET, the first target CORESET can be determined based on the principle of the lowest index value. A TCI state is determined as the TCI state corresponding to the PDSCH, which can ensure the optionality of the TCI state.

In the case where the two second CORESETs are the two reference CORESETs, selecting a first target CORESET from the L reference CORESETs according to the CORESET index values corresponding to each of the reference CORESETs, And select a TCI state in the first target CORESET to determine the TCI state corresponding to the PDSCH, including:

If the second CORESET is the reference CORESET, when the first target CORESET is determined and the TCI state corresponding to the PDSCH is determined, for the two reference CORESETs, according to the CORESET index value, among the two reference CORESETs, the one corresponding to the lowest CORESET index value may be selected. For the second CORESET, the selected second CORESET is determined as the first target CORESET. Since the first target CORESET includes one TCI state, the TCI state in the first target CORESET may be determined as the TCI state corresponding to the PDSCH.

The terminal device receives the RRC signaling sent by the network device, where the RRC signaling carries M CORESET configurations, the SFN transmission mode corresponding to PDSCH, the non-SFN transmission mode corresponding to PDCCH, and the PDSCH configuration (the PDSCH configuration includes N TCI state index values, N is an integer greater than or equal to 2 and less than or equal to 128).

Before the terminal device receives the activation information of the MAC-CE, the TCI states corresponding to the first two TCI state index values in the N TCI state index values in the PDSCH configuration are determined as the two TCI states corresponding to the PDSCH. For the PDCCH, the TCI state of the SSB/CSI-RS during random access is determined as a TCI state corresponding to the PDCCH.

After the terminal device receives the activation information of the MAC-CE, when the time interval between receiving the DCI and receiving its scheduled PDSCH is less than the preset threshold, it determines 3 CORESETs corresponding to the target BWP among the M CORESETs. Referring to Figure 3, when three CORESETs (CORESET#0, CORESET#1 and CORESET#2) all include one TCI state, since the SS set in CORESET#0 and the SS set in CORESET#1 are associated states, Therefore, the terminal device can think that the two CORESETs are sent by different TRP frequency division multiplexing, so the terminal device can select the CORESET (CORESET#0) with the lowest CORESET index value among the two correlated CORESETs, and then select the CORESET in the selected CORESET The TCI state is determined as the TCI state corresponding to the PDSCH. Of course, the SS set associations in the three CORESETs can also be other situations, which are not listed here. When the second CORESET is the reference CORESET, there may be other implementation situations for determining the TCI states corresponding to the PDCCH and PDSCH, which are not listed here.

In the above implementation process of the present disclosure, by selecting the second CORESET with the lowest index value among the two second CORESETs as the first target CORESET, it is possible to determine the first target CORESET based on the principle of the lowest index value in the two second CORESETs associated with the SS Set at the same time. For a target CORESET, by determining the TCI state in the first target CORESET as the TCI state corresponding to the PDSCH, the quickness of the determination of the TCI state can be ensured.

In the case that the third CORESET and the fourth CORESET are two of the reference CORESETs, selecting a first target CORESET from the L reference CORESETs according to the CORESET index values corresponding to each of the reference CORESETs, And select a TCI state in the first target CORESET to determine the TCI state corresponding to the PDSCH, including:

If the third CORESET and the fourth CORESET are reference CORESETs, when the first target CORESET is determined and the TCI state corresponding to the PDSCH is determined, the lowest CORESET can be selected from the two reference CORESETs according to the CORESET index value for the two reference CORESETs For the CORESET corresponding to the index value, the selected CORESET is determined as the first target CORESET. Since the first target CORESET includes one TCI state, the TCI state in the first target CORESET may be determined as the TCI state corresponding to the PDSCH.

The terminal device receives the RRC signaling sent by the network device, where the RRC signaling carries M CORESET configurations, the SFN transmission mode corresponding to PDSCH, the non-SFN transmission mode corresponding to PDCCH, and the PDSCH configuration (the PDSCH configuration includes N TCI state index values, N is 1).

Before the terminal device receives the activation information of the MAC-CE, the TCI state of the SSB/CSI-RS during random access is determined as a TCI state corresponding to the PDSCH; for PDCCH, the SSB/CSI-RS during random access is determined as a TCI state. The TCI state of the RS is determined as a TCI state corresponding to the PDCCH.

After the terminal device receives the activation information of the MAC-CE, when the time interval between receiving the DCI and receiving its scheduled PDSCH is less than the preset threshold, it determines 3 CORESETs corresponding to the target BWP among the M CORESETs. Referring to FIG. 4 , each of the three CORESETs (CORESET#0, CORESET#1, and CORESET#2) includes one TCI state, wherein CORESET#3, CORESET#4, and CORESET#5 are the target BWPs at another moment in time The corresponding 3 CORESETs. If it can be known through RRC signaling that the SS set in CORESET#0 at time 0 and the SS set in CORESET#3 at time 1 are in an associated state, the terminal device can consider that the two CORESETs are sent by different TRPs. Therefore, The terminal device may select the CORESET (CORESET#0) with the lowest CORESET index value among the two correlated CORESETs, and then determine the TCI state in the selected CORESET as the TCI state corresponding to the PDSCH. Of course, the association of SS sets in different CORESETs at different times can also be in other situations (for example, the SS set in CORESET#0 is associated with the SS set in CORESET#4, and the SS set in CORESET#1 is associated with the SS set in CORESET#4. ), which will not be listed here. When the third CORESET is the reference CORESET, there may be other implementation situations for determining the TCI states corresponding to the PDCCH and PDSCH, which are not listed here.

In the above implementation process of the present disclosure, by selecting the CORESET with the lowest index value among the two reference CORESETs as the first target CORESET, it is possible to determine the first target CORESET in the two CORESETs associated with the SS Sets at different times based on the principle of the lowest index value. Determining the TCI state in the first target CORESET as the TCI state corresponding to the PDSCH can ensure the quickness of the TCI state determination.

In order to further illustrate determining the reference CORESET according to the priority, the following describes the process of determining the TCI state through two specific examples for the case that the terminal device does not receive the target enable parameter (the RRC signaling does not carry the target enable parameter).

The terminal device receives the RRC signaling sent by the network device, where the RRC signaling carries M CORESET configurations, the SFN transmission mode corresponding to the PDSCH, the SFN transmission mode corresponding to the PDCCH, and the PDSCH configuration (the PDSCH configuration includes N TCI state index values, N is an integer greater than or equal to 2 and less than or equal to 128).

After the terminal device receives the activation information of the MAC-CE, when the time interval between receiving the DCI and receiving its scheduled PDSCH is less than the preset threshold, the CORESET corresponding to the target BWP is determined among the M CORESETs. Referring to FIG. 5 , it is detected in the target BWP that CORESET#0 includes one TCI state, and CORESET#1 and CORESET#2 include two TCI states respectively. CORESET#3, CORESET#4, and CORESET#5 are three CORESETs corresponding to the target BWP at another moment, and CORESET#3, CORESET#4, and CORESET#5 respectively include a TCI state. Through the RRC configuration (CORESET configuration in RRC signaling), it can be known that the SS set in CORESET#0 in time 0 and the SS set in CORESET#3 in time 1 are in an associated state. When the terminal device detects the reference CORESET, it first detects whether there is a CORESET including two TCI states. Since CORESET#1 and CORESET#2 respectively include two TCI states, CORESET#1 and CORESET#2 are determined as the reference CORESET. Then, the CORESET (CORESET#1) corresponding to the lowest CORESET index value is determined as the first target CORESET, and any TCI state in the CORESET#1 is determined as the TCI state corresponding to the PDSCH. Although there is an SS set association in this embodiment, the priority of the CORESET including the two TCI states is higher than the priority of the CORESET forming the SS set association, so CORESET#1 and CORESET#2 are determined as reference CORESETs.

In another specific implementation process, the terminal device receives RRC signaling sent by the network device, wherein the RRC signaling carries M CORESET configurations, the SFN transmission mode corresponding to PDSCH, the non-SFN transmission mode corresponding to PDCCH, and the PDSCH configuration (PDSCH configuration). It includes N TCI state index values, where N is an integer greater than or equal to 2 and less than or equal to 128).

Before the terminal device receives the activation information of the MAC-CE, the TCI states corresponding to the first two TCI state index values in the N (values 2 to 128) TCI state index values in the PDSCH configuration are determined as the TCI states corresponding to the PDSCH. Two TCI states. For the PDCCH, the TCI state of the SSB/CSI-RS during random access is determined as a TCI state corresponding to the PDCCH.

After the terminal device receives the activation information of the MAC-CE, when the time interval between receiving the DCI and receiving the scheduled PDSCH is less than the preset threshold, the CORESET corresponding to the target BWP is determined among the M CORESETs. Referring to FIG. 6 , CORESET#0, CORESET#1 and CORESET#2 monitored in the target BWP respectively include a TCI state. CORESET#3, CORESET#4, and CORESET#5 are three CORESETs corresponding to the target BWP at another moment, and CORESET#3, CORESET#4, and CORESET#5 respectively include a TCI state. Through the RRC configuration, it can be seen that the SS set in CORESET#0 in time 0 is associated with the SS set in CORESET#3 in time 1, and the SS set in CORESET#1 in time 0 is related to the SS set in CORESET#2 in time 0. The same is in the associated state, so the terminal device can think that CORESET#0 and CORESET#3 are sent by different TRP time division multiplexing, CORESET#1 and CORESET#2 are sent by different TRP frequency division multiplexing, the terminal device preferentially selects the same TRP The two CORESETs (CORESET#1, CORESET#2) that are related to each other in the moment are the reference CORESETs, and then the CORESET (CORESET#1) with the lowest CORESET index value in the reference CORESET is determined as the first target CORESET, and the TCI in CORESET#1 is determined as the first target CORESET. The state is determined to be the TCI state corresponding to the PDSCH. In this embodiment, although there are SS set associations at the same time and SS set associations at different times, since the priority of the SS set association at the same time is higher than the priority of the SS set association at different times, CORESET#1, CORESET# 2 Determined as the reference CORESET.

The following describes the process of determining the TCI state corresponding to the PDSCH in the case where the RRC signaling carries the target enable parameter after receiving the activation information of the MAC-CE. In this embodiment, determining the TCI state corresponding to the PDSCH among the TCI states corresponding to the L reference CORESETs according to the second CORESET selection rule and the second TCI state selection rule includes:

According to the second CORESET selection rule and the second TCI state selection rule, when the TCI state corresponding to the PDSCH is determined among the TCI states corresponding to the L reference CORESETs, for the case where the reference CORESET is the first CORESET, since each CORESET configuration can also Including the CORESET index value, at this time, a second target CORESET can be selected from the L reference CORESETs according to the CORESET index values corresponding to the reference CORESETs, and since the first CORESET is a CORESET including two TCI states, it can be selected in the After the second target CORESET, the two TCI states in the second target CORESET are determined as TCI states corresponding to the PDSCH.

According to the second CORESET selection rule and the second TCI state selection rule, when determining the TCI state corresponding to the PDSCH among the TCI states corresponding to the L reference CORESETs, for the case where the reference CORESET is the second CORESET or the reference CORESET is the third CORESET and In the case of the fourth CORESET, two reference CORESETs can be determined as two second target CORESETs according to the SS set association principle, specifically, according to the SS set association at the same time, the two second CORESETs are determined as two second targets CORESET, according to the association of SS sets at different times, the third CORESET and the fourth CORESET are determined as two second target CORESETs.

Since the second CORESET includes one TCI state, and the two second CORESETs correspond to different TCI states, in the case of determining the two second CORESETs as two second target CORESETs, the TCI states in the two second CORESETs may be Combining is performed, and the combined two TCI states are determined as the TCI states corresponding to the PDSCH. Since the third CORESET and the fourth CORESET respectively include one TCI state, and the third CORESET and the fourth CORESET correspond to different TCI states, for the case where the third CORESET and the fourth CORESET are determined as two second target CORESETs, it is possible to The TCI states in the third CORESET and the fourth CORESET are combined, and the combined two TCI states are determined as the TCI states corresponding to the PDSCH.

Since the RRC signaling carries the target enable parameter, and the target enable parameter is used to indicate that the two default TCI states are enabled, the two TCI states corresponding to the PDSCH can be determined.

In the above implementation process of the present disclosure, when the reference CORESET is the first CORESET, the second target CORESET can be determined according to the CORESET index value, and the TCI state corresponding to the PDSCH can be determined according to the TCI state in the second target CORESET; when the reference CORESET is the second CORESET , combine the TCI states in the two second CORESETs according to the SS set association at the same time, to determine the TCI state corresponding to the PDSCH based on the TCI state combination, when the reference CORESET is the third CORESET and the fourth CORESET, according to different time The SS set association combines the TCI states in the third CORESET and the fourth CORESET to determine the TCI state corresponding to the PDSCH based on the TCI state combination.

Optionally, on the basis of the foregoing embodiment, selecting a second target CORESET from the L reference CORESETs according to the CORESET index value corresponding to each of the reference CORESETs, including;

When a second target CORESET is selected among the L reference CORESETs based on the CORESET index value, the reference CORESET with the lowest CORESET index value may be filtered out of the L reference CORESETs, and the filtered reference CORESET is determined as the second target CORESET. That is, it is implemented to determine the second target CORESET based on the principle of the lowest index value.

In the following, for the case where the target enabling parameters are carried in the RRC signaling, that is, the terminal device receives the target enabling parameters, several specific examples are used to determine the TCI state corresponding to the PDSCH and the PDCCH before receiving the activation information of the MAC-CE, and the receiving MAC The process of determining the TCI state corresponding to the PDSCH after the activation information of the CE will be described.

Example 1

The terminal device receives the RRC signaling sent by the network device, wherein the RRC signaling carries M CORESET configurations, SFN transmission modes corresponding to PDSCH, SFN transmission modes corresponding to PDCCH, PDSCH configurations, and target enabling parameters.

Since the RRC signaling carries the target enable parameter, two TCI states corresponding to the PDSCH need to be determined. After the terminal device receives the activation information of the MAC-CE, when the time interval between receiving the DCI and receiving its scheduled PDSCH is less than the preset threshold, it determines 3 CORESETs corresponding to the target BWP among the M CORESETs. Referring to Figure 2a, when the three CORESETs (CORESET#0, CORESET#1, and CORESET#2) all include two TCI states, select the CORESET (CORESET#0) with the lowest CORESET index value, and place the selected CORESET in the The two TCI states (TCI state #0, TCI state #1) are determined to be the two TCI states corresponding to the PDSCH. Or, as shown in Figure 2b, among the three CORESETs (CORESET#0, CORESET#1, and CORESET#2), only the CORESET with the lowest CORESET index value (CORESET#0) includes two TCI states, and the remaining CORESETs (CORESET# 1 and CORESET#2) both include one TCI state, then the CORESET#0 including two TCI states is determined as the first target CORESET, and the two TCI states (TCI state #0, TCI state #1) in CORESET#0 are determined as the first target CORESET. ) is determined as two TCI states corresponding to PDSCH. At this time, according to the principle of the lowest index value, the TCI state corresponding to the PDSCH may be determined according to the CORESET including two TCI states. Of course, the corresponding TCI states in the three CORESETs may also be other situations, which will not be listed and described here. In this embodiment, the process after receiving the activation information of the MAC-CE is the case of determining the TCI state corresponding to the PDSCH based on the first CORESET.

Example 2

The terminal device receives the RRC signaling sent by the network device, where the RRC signaling carries M CORESET configurations, the SFN transmission mode corresponding to PDSCH, the non-SFN transmission mode corresponding to PDCCH, and the PDSCH configuration (the PDSCH configuration includes N TCI state index values, N is an integer greater than or equal to 2 and less than or equal to 128) and a target enable parameter.

Since the RRC signaling carries the target enable parameter, two TCI states corresponding to the PDSCH need to be determined. After the terminal device receives the activation information of the MAC-CE, when the time interval between receiving the DCI and receiving its scheduled PDSCH is less than the preset threshold, it determines 3 CORESETs corresponding to the target BWP among the M CORESETs. Referring to Figure 3, when three CORESETs (CORESET#0, CORESET#1 and CORESET#2) all include one TCI state, since the SS set in CORESET#0 and the SS set in CORESET#1 are associated states, Therefore, the terminal device may consider that the two CORESETs are sent by different TRP frequency division multiplexing, and the terminal device may select two CORESETs that are related to each other and combine them together to determine the TCI state corresponding to the PDSCH. At this time, the TCI state corresponding to the PDSCH can be determined according to the TCI corresponding to the two CORESETs associated with the SS set at the same time. Of course, the SS set associations in the three CORESETs can also be in other situations, which will not be listed here. In this embodiment, the process after receiving the activation information of the MAC-CE is the case where the TCI state corresponding to the PDSCH is determined based on the second CORESET.

Example three

The terminal device receives the RRC signaling sent by the network device, where the RRC signaling carries M CORESET configurations, the SFN transmission mode corresponding to PDSCH, the non-SFN transmission mode corresponding to PDCCH, and the PDSCH configuration (the PDSCH configuration includes N TCI state index values, N is 1) and the target enable parameter.

Since the RRC signaling carries the target enable parameter, two TCI states corresponding to the PDSCH need to be determined. After the terminal device receives the activation information of the MAC-CE, when the time interval between receiving the DCI and receiving its scheduled PDSCH is less than the preset threshold, it determines 3 CORESETs corresponding to the target BWP among the M CORESETs. Referring to Figure 4, each of the three CORESETs (CORESET#0, CORESET#1, and CORESET#2) includes one TCI state, and CORESET#3, CORESET#4, and CORESET#5 are corresponding to the target BWP at another moment. 3 CORESETs. If it can be known through RRC signaling that the SS set in CORESET#0 at time 0 and the SS set in CORESET#3 at time 1 are in an associated state, the terminal device can consider that the two CORESETs are sent by different TRPs. The device may combine the TCI state corresponding to CORESET#0 and the TCI state corresponding to CORESET#3 to determine the TCI state corresponding to the PDSCH. Of course, the association of SS sets in different CORESETs at different times can also be in other situations, which will not be listed here. In this embodiment, the process after receiving the activation information of the MAC-CE is the case of determining the TCI state corresponding to the PDSCH based on the third CORESET and the fourth CORESET.

Example 4

The terminal device receives the RRC signaling sent by the network device, where the RRC signaling carries M CORESET configurations, the SFN transmission mode corresponding to PDSCH, the SFN transmission mode corresponding to PDCCH, and the PDSCH configuration (the PDSCH configuration includes N TCI state index values, N is an integer greater than or equal to 2 and less than or equal to 128) and the target enable parameter.

Before the terminal device receives the activation information of the MAC-CE, the TCI states corresponding to the first two TCI state index values in the N (values 2 to 128) TCI state index values in the PDSCH configuration are determined as the TCI states corresponding to the PDSCH. Two TCI states. For PDCCH, for each CORESET configuration including one TCI state index value, the TCI state of the SSB/CSI-RS during random access is determined as the TCI state corresponding to the CORESET corresponding to the current CORESET configuration, and for each CORESET configuration including at least one For each CORESET configuration of the two TCI state index values, determine the TCI states corresponding to the first two TCI state index values in the current CORESET configuration as the TCI state corresponding to the CORESET corresponding to the current CORESET configuration, and the TCI state corresponding to the PDCCH includes: The TCI status corresponding to each CORESET.

Since the RRC signaling carries the target enable parameter, two TCI states corresponding to the PDSCH need to be determined. After the terminal device receives the activation information of the MAC-CE, when the time interval between receiving the DCI and receiving the scheduled PDSCH is less than the preset threshold, the CORESET corresponding to the target BWP is determined among the M CORESETs. Referring to FIG. 5 , CORESET#0 monitored in the target BWP includes one TCI state, and CORESET#1 and CORESET#2 respectively include two TCI states. CORESET#3, CORESET#4 and CORESET#5 are the three CORESETs corresponding to the target BWP at another time. CORESET#3, CORESET#4 and CORESET#5 respectively include a TCI state. Through RRC configuration, we can know that CORESET at time 0 The SS set in #0 is associated with the SS set in CORESET#3 in time 1. When the terminal device detects the reference CORESET, it first detects whether there is a CORESET including two TCI states. Since CORESET#1 and CORESET#2 respectively include two TCI states, CORESET#1 and CORESET#2 are determined as the reference CORESET. Then, the CORESET (CORESET#1) corresponding to the lowest CORESET index value is determined as the first target CORESET, and the two TCI states in CORESET#1 are determined as the TCI states corresponding to the PDSCH. Although there is an SS set association in this embodiment, the priority of the CORESET including the two TCI states is higher than the priority of the CORESET forming the SS set association, so CORESET#1 and CORESET#2 are determined as reference CORESETs.

Embodiment 5

Since the RRC signaling carries the target enable parameter, two TCI states corresponding to the PDSCH need to be determined. After the terminal device receives the activation information of the MAC-CE, when the time interval between receiving the DCI and receiving the scheduled PDSCH is less than the preset threshold, the CORESET corresponding to the target BWP is determined among the M CORESETs. Referring to FIG. 6 , CORESET#0, CORESET#1 and CORESET#2 monitored in the target BWP respectively include a TCI state. CORESET#3, CORESET#4, and CORESET#5 are three CORESETs corresponding to the target BWP at another moment, and CORESET#3, CORESET#4, and CORESET#5 respectively include a TCI state. Through the RRC configuration, it can be seen that the SS set in CORESET#0 in time 0 is associated with the SS set in CORESET#3 in time 1, and the SS set in CORESET#1 in time 0 is related to the SS set in CORESET#2 in time 0. In the same state of association, the terminal device can consider that CORESET#0 and CORESET#3 are sent by different TRP time-division multiplexing, CORESET#1 and CORESET#2 are sent by different TRP frequency-division multiplexing, and the terminal device preferentially selects the same time The two CORESETs (CORESET#1 and CORESET#2) that are correlated with each other are the reference CORESETs, and then the TCI states in the reference CORESETs are combined to determine the TCI states corresponding to the PDSCH. Although there are SS set associations at the same time and SS set associations at different times in this embodiment, since the priority of the SS set association at the same time is higher than the priority of the SS set association at different times, CORESET#1, CORESET# 2 Determined as the reference CORESET.

The above embodiments are only used to describe several situations in which the terminal device determines the TCI state corresponding to the PDCCH and PDSCH when the terminal device receives the target enable parameter, and other implementation situations are not listed here.

In an optional embodiment of the present disclosure, after receiving the activation information of the MAC-CE and determining the TCI state corresponding to the PDSCH, the method further includes:

After receiving the activation information of the MAC-CE and determining the TCI state corresponding to the PDSCH, the terminal device may receive a default beam sent by the network device through a TCI state corresponding to the PDSCH within a time interval. Or receive two default beams sent by the network device through the two TCI states corresponding to the PDSCH within the time interval.

In the above implementation process of the present disclosure, after receiving the activation information of the MAC-CE, within a time interval, a default receive beam sent by a network device can be received through a TCI state corresponding to the PDSCH, or two TCI states corresponding to the PDSCH can be received. Receive two default beams sent by network devices.

The above is the implementation process of the method for determining the TCI state of the transmission configuration indication according to the embodiment of the present disclosure. When the PDSCH is SFN transmission, before receiving the activation information of the MAC-CE, the TCI state of the PDSCH can be determined according to the PDSCH configuration, and the TCI state of the PDSCH can be determined according to the different transmissions of the PDCCH. After receiving the activation information of the MAC-CE, the TCI state of the PDSCH can be dynamically determined according to whether the terminal device receives the target enable parameter, so as to ensure the correct reception of PDSCH and PDCCH data.

The method for determining the TCI state of the transmission configuration indication provided by the embodiments of the present disclosure has been described above. The following describes the apparatus for determining the TCI state of the transmission configuration indication provided by the embodiments of the present disclosure with reference to the accompanying drawings.

Referring to FIG. 7 , an embodiment of the present disclosure further provides an apparatus for determining a TCI state of a transmission configuration indication, which is applied to a terminal device, including:

The first receiving module 701 is configured to receive the radio resource control RRC signaling sent by the network device, where the RRC signaling carries the CORESET configuration of M control resource sets, the single frequency network SFN transmission mode corresponding to the downlink shared channel PDSCH, and the downlink control channel The target transmission mode corresponding to the PDCCH, the CORESET configuration includes time-frequency resource locations and N TCI state index values, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1 and less than or equal to 128;

The first determining module 702 is configured to determine the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH before receiving the activation information of the medium access control MAC-control element CE sent by the network device, The target transmission mode corresponding to the PDCCH determines the TCI state corresponding to the PDCCH;

The second determining module 703 is configured to, when the activation information of the MAC-CE is received and the time interval between receiving the downlink control information DCI and receiving the PDSCH scheduled by the MAC-CE is less than a preset threshold, determine whether the target is carried in the RRC signaling according to whether the The condition of enabling parameters, the CORESET selection rule and the TCI state selection rule, determine the TCI state corresponding to the PDSCH;

Optionally, the RRC signaling also carries a PDSCH configuration, and the PDSCH configuration includes N TCI state index values; the first determining module includes:

The first determination sub-module is used to determine the TCI states corresponding to the first two TCI state index values in the N TCI state index values respectively when the PDSCH is the SFN transmission mode and N is greater than or equal to 2, as Two TCI states corresponding to the PDSCH;

The second determination sub-module is used to determine the TCI state of the synchronization signal block SSB/channel state information CSI-reference signal RS during random access when the PDSCH is the SFN transmission mode and the value of N is 1 is a TCI state corresponding to the PDSCH.

Optionally, the device further includes:

The second receiving module is configured to, after the first determining module determines the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, in the case where N is greater than or equal to 2, use the two corresponding PDSCH two TCI states respectively receive two default beams sent by the network device;

The third receiving module is configured to, after the first determining module determines the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, in the case where the value of N is 1, through the corresponding PDSCH A TCI state receives a default beam sent by the network device.

Optionally, the first determining module includes:

The third determination sub-module is configured to determine the TCI state of the synchronization signal block SSB/channel state information CSI-reference signal RS during random access when the target transmission mode corresponding to the PDCCH is a non-SFN transmission mode as a TCI state corresponding to the PDCCH;

The fourth determination sub-module is used for, for each CORESET configuration including a TCI state index value, when the target transmission mode corresponding to the PDCCH is the SFN transmission mode, the SSB/CSI-RS during random access The TCI state is determined as the TCI state corresponding to the CORESET corresponding to the current CORESET configuration. For each CORESET configuration including at least two TCI state index values, the TCI states corresponding to the first two TCI state index values in the current CORESET configuration are determined. is the TCI state corresponding to the CORESET corresponding to the current CORESET configuration, and the TCI state corresponding to the PDCCH includes the TCI state corresponding to each CORESET.

Optionally, the device further includes:

a fourth receiving module, configured to, after the first determining module determines the TCI state corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH, in the case that the PDCCH is a non-SFN transmission mode, pass the PDCCH A corresponding TCI state receives a default beam sent by the network device;

A fifth receiving module, configured to, after the first determining module determines the TCI state corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH, in the case that the PDCCH is the SFN transmission mode, for each CORESET, One or two default beams sent by the network device are received through the corresponding TCI state.

Optionally, the second determining module includes:

The fifth determination submodule is used to determine K CORESETs corresponding to the target bandwidth part BWP among the M CORESETs, where the target BWP is the BWP corresponding to the terminal device, and K is an integer greater than or equal to 1 and less than or equal to 3 ;

The sixth determination sub-module is used to determine L reference CORESETs according to a preset strategy after determining K CORESETs, where L is an integer greater than or equal to 1 and less than or equal to K;

A seventh determination sub-module, configured to determine in the TCI states corresponding to the L reference CORESETs according to the first CORESET selection rule and the first TCI state selection rule when the target enable parameter is not carried in the RRC signaling the TCI state corresponding to the PDSCH;

The eighth determination sub-module is configured to, when the target enable parameter is carried in the RRC signaling, according to the second CORESET selection rule and the second TCI state selection rule, in the TCI states corresponding to the L reference CORESETs Determine the TCI state corresponding to the PDSCH.

Optionally, the CORESET configuration also includes the CORESET index value and the association between the search space set SSSet in the current CORESET and the SS Set in other CORESETs;

The sixth determination submodule includes:

a first detection unit, configured to detect whether there is a first CORESET in the K CORESETs, where the first CORESET includes two TCI states;

a first determining unit, configured to determine that the first CORESET is the reference CORESET in the presence of the first CORESET, and the number of the first CORESET is greater than or equal to 1 and less than or equal to K;

a second detection unit, configured to detect whether there are two second CORESETs associated with the SS set at the same moment in the K CORESETs in the absence of the first CORESET;

a second determining unit, configured to determine that two of the second CORESETs are two of the reference CORESETs when there are two of the second CORESETs, and the second CORESETs include one TCI state;

A third detection unit, configured to detect whether there is a third CORESET among the K CORESETs in the absence of two of the second CORESETs, where the SS Set in the third CORESET and the target BWP are at another moment The SS Set in the fourth CORESET in the corresponding P CORESETs forms an association, and P is an integer greater than or equal to 1 and less than or equal to 3;

a third determining unit, configured to determine that the third CORESET and the fourth CORESET are two of the reference CORESETs in the presence of the third CORESET, and both the third CORESET and the fourth CORESET are Include a TCI status.

Optionally, the seventh determination submodule is further used for:

Optionally, when the first CORESET is the reference CORESET, the seventh determination sub-module is further configured to:

Optionally, in the case where the two second CORESETs are the two reference CORESETs, the seventh determination submodule is further configured to:

Optionally, when the third CORESET and the fourth CORESET are two of the reference CORESETs, the seventh determination submodule is further configured to:

Optionally, the eighth determination submodule includes:

a first processing unit, configured to select a second target CORESET from the L reference CORESETs according to the CORESET index value corresponding to each of the reference CORESETs in the case that the reference CORESET is the first CORESET, Determining the two TCI states in the second target CORESET as the TCI states corresponding to the PDSCH;

a second processing unit, configured to associate the two reference CORESETs according to the SS set association principle when the reference CORESET is the second CORESET or the reference CORESET is the third CORESET and the fourth CORESET The CORESETs are determined as two second target CORESETs, the TCI states in the two second target CORESETs are combined, and the combined two TCI states are determined as the TCI states corresponding to the PDSCH.

Optionally, the first processing unit is further configured to:

Optionally, after receiving the activation information of the MAC-CE and determining the TCI state corresponding to the PDSCH, the apparatus further includes:

A sixth receiving module, configured to receive a default beam sent by the network device within the time interval through a determined TCI state corresponding to the PDSCH; or

A seventh receiving module, configured to respectively receive two default beams sent by the network device within the time interval by using the two determined TCI states corresponding to the PDSCH.

It should be noted that the division of modules (units) in the embodiments of the present disclosure is schematic, and is only a logical function division, and there may be other division manners in actual implementation. In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a processor-readable storage medium. Based on this understanding, the technical solutions of the present disclosure can be embodied in the form of software products in essence, or the part that contributes to the prior art, or all or part of the technical solutions, and the computer software product is stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present disclosure. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

It should be noted here that the above-mentioned device provided by the embodiment of the present disclosure can realize all the method steps realized by the above-mentioned method embodiment, and can achieve the same technical effect, and the same as the method embodiment in this embodiment is not repeated here. The parts and beneficial effects will be described in detail.

An embodiment of the present disclosure further provides a terminal device. As shown in FIG. 8 , the terminal device includes a memory 801, a transceiver 802, and a processor 803; the memory 801 is used to store a computer program; 803 to receive and send data under the control; processor 803, for reading the computer program in the memory 801 and performing the following operations:

Control the transceiver 802 to receive the radio resource control RRC signaling sent by the network device, the RRC signaling carries the CORESET configuration of M control resource sets, the single frequency network SFN transmission mode corresponding to the downlink shared channel PDSCH, and the downlink control channel PDCCH corresponding The CORESET configuration includes time-frequency resource locations and N TCI state index values, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1 and less than or equal to 128;

Before the transceiver 802 receives the activation information of the medium access control MAC-control element CE sent by the network device, it determines the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, and determines the TCI state corresponding to the PDSCH according to the PDCCH The corresponding target transmission mode determines the TCI state corresponding to the PDCCH;

When the transceiver 802 receives the activation information of the MAC-CE and the time interval between receiving the downlink control information DCI and receiving the PDSCH scheduled by the transceiver 802 is less than a preset threshold, according to whether the RRC signaling carries the target enable parameter situation, CORESET selection rule and TCI state selection rule, determine the TCI state corresponding to the PDSCH;

Optionally, the RRC signaling also carries a PDSCH configuration, and the PDSCH configuration includes N TCI state index values; the processor 803 is further configured to perform the following operations:

Optionally, after determining the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, the processor 803 is further configured to perform the following operations:

In the case that N is greater than or equal to 2, control the transceiver 802 to respectively receive two default beams sent by the network device through the two TCI states corresponding to the PDSCH;

When the value of N is 1, the transceiver 802 is controlled to receive a default beam sent by the network device through a TCI state corresponding to the PDSCH.

Optionally, the processor 803 is further configured to perform the following operations:

Optionally, after the TCI state corresponding to the PDCCH is determined according to the target transmission mode corresponding to the PDCCH, the processor 803 is further configured to perform the following operations:

In the case that the PDCCH is a non-SFN transmission mode, controlling the transceiver 802 to receive a default beam sent by the network device through a TCI state corresponding to the PDCCH;

When the PDCCH is the SFN transmission mode, for each CORESET, the transceiver 802 is controlled to receive one or two default beams sent by the network device through the corresponding TCI state.

Determine K CORESETs corresponding to the target bandwidth part BWP in the M CORESETs, where the target BWP is the BWP corresponding to the terminal device, and K is an integer greater than or equal to 1 and less than or equal to 3;

The processor 803 is further configured to perform the following operations:

Optionally, in the case that the first CORESET is the reference CORESET; the processor 803 is further configured to perform the following operations:

Optionally, in the case where the two second CORESETs are the two reference CORESETs; the processor 803 is further configured to perform the following operations:

Optionally, in the case that the third CORESET and the fourth CORESET are two of the reference CORESETs; the processor 803 is further configured to perform the following operations:

Optionally, after the transceiver 802 receives the MAC-CE activation information and the processor 803 determines the TCI state corresponding to the PDSCH, the processor 803 is further configured to perform the following operations:

Control the transceiver 802 to receive a default beam sent by the network device within the time interval through a determined TCI state corresponding to the PDSCH; or

The transceiver 802 is controlled to respectively receive two default beams sent by the network device within the time interval through the two determined TCI states corresponding to the PDSCH.

8, the bus architecture may include any number of interconnected buses and bridges, specifically, one or more processors represented by processor 803 and various circuits of memory represented by memory 801 are linked together. The bus architecture may also link together various other circuits, such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be described further herein. The bus interface provides the interface. Transceiver 802 may be multiple elements, ie, including transmitters and receivers, providing means for communicating with various other devices over transmission media including wireless channels, wired channels, fiber optic cables, and the like. For different user equipments, the user interface 804 may also be an interface capable of externally connecting the required equipment, and the connected equipment includes but is not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 803 is responsible for managing the bus architecture and general processing, and the memory 801 may store data used by the processor 803 in performing operations.

The processor 803 may be a central processor (CPU), an application specific integrated circuit (ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or a complex programmable logic device (Complex Programmable Logic Device). , CPLD), the processor can also use a multi-core architecture.

The processor 803 is configured to execute the method provided by the embodiments of the present disclosure according to the obtained executable instructions by invoking the computer program stored in the memory. The processor 803 and the memory 801 may also be arranged physically separately.

Embodiments of the present disclosure also provide a processor-readable storage medium, where a computer program is stored in the processor-readable storage medium, and when the computer program is executed by a processor, the above-mentioned method for determining a TCI state of a transmission configuration indication is implemented. A step of.

The processor-readable storage medium can be any available medium or data storage device that can be accessed by a processor, including, but not limited to, magnetic storage (eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (eg, CD, DVD, BD, HVD, etc.), and semiconductor memory (eg, ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state disk (SSD)), etc.

Embodiments of the present disclosure also provide a computer program, including computer-readable code, which, when the computer-readable code is executed on a computing and processing device, causes the computing and processing device to execute the above-mentioned method for determining a TCI state of a transmission configuration indication .

As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein, including but not limited to disk storage, optical storage, and the like.

The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block in the flowcharts and/or block diagrams, and combinations of flows and/or blocks in the flowcharts and/or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These processor-executable instructions may also be stored in a processor-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the processor-readable memory result in the manufacture of means including the instructions product, the instruction means implements the functions specified in the flow or flow of the flowchart and/or the block or blocks of the block diagram.

These processor-executable instructions can also be loaded onto a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process that Execution of the instructions provides steps for implementing the functions specified in the flowchart or blocks and/or the block or blocks of the block diagrams.

The device embodiments described above are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in One place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

Various component embodiments of the present disclosure may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will understand that a microprocessor or a digital signal processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in a computing processing device according to embodiments of the present disclosure. The present disclosure can also be implemented as apparatus or apparatus programs (eg, computer programs and computer program products) for performing some or all of the methods described herein. Such a program implementing the present disclosure may be stored on a computer-readable medium, or may be in the form of one or more signals. Such signals may be downloaded from Internet sites, or provided on carrier signals, or in any other form.

For example, Figure 9 illustrates a computing processing device that may implement methods in accordance with the present disclosure. The computing processing device traditionally includes a processor 910 and a computer program product or computer readable medium in the form of a memory 920 . The memory 920 may be electronic memory such as flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM. The memory 920 has storage space 930 for program code 931 for performing any of the method steps in the above-described methods. For example, the storage space 930 for program codes may include various program codes 931 for implementing various steps in the above methods, respectively. These program codes can be read from or written to one or more computer program products. These computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks. Such computer program products are typically portable or fixed storage units as described with reference to FIG. 10 . The storage unit may have storage segments, storage spaces, etc. arranged similarly to the memory 920 in the computing processing device of FIG. 9 . The program code may, for example, be compressed in a suitable form. Typically, the storage unit includes computer readable code 931', ie code readable by a processor such as 910, for example, which when executed by a computing processing device, causes the computing processing device to perform any of the methods described above. of the various steps.

Reference herein to "one embodiment," "an embodiment," or "one or more embodiments" means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present disclosure. Also, please note that instances of the phrase "in one embodiment" herein are not necessarily all referring to the same embodiment.

In the description provided herein, numerous specific details are set forth. It is to be understood, however, that embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present disclosure may be implemented by means of hardware comprising several different elements and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, and third, etc. do not denote any order. These words can be interpreted as names.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

A method for determining a TCI state of a transmission configuration indication, applied to a terminal device, is characterized in that, comprising:

Receive the radio resource control RRC signaling sent by the network device, where the RRC signaling carries the CORESET configuration of M control resource sets, the single frequency network SFN transmission mode corresponding to the downlink shared channel PDSCH, and the target transmission mode corresponding to the downlink control channel PDCCH. The CORESET configuration includes time-frequency resource locations and N TCI state index values, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1 and less than or equal to 128;

Before receiving the activation information of the medium access control MAC-control element CE sent by the network device, determine the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, and determine the TCI state corresponding to the PDSCH according to the target transmission mode corresponding to the PDCCH determining the TCI state corresponding to the PDCCH;

When the activation information of the MAC-CE is received and the time interval between receiving the downlink control information DCI and receiving the PDSCH scheduled by the MAC-CE is less than the preset threshold, CORESET is selected according to whether the RRC signaling carries the target enable parameter or not. Rules and TCI state selection rules to determine the TCI state corresponding to the PDSCH;

The target enable parameter is used to indicate that two default TCI states are enabled, the preset threshold is quasi-co-located QCL duration, and the terminal device determines M CORESETs according to the M time-frequency resource positions, each The TCI state index value corresponds to a TCI state, and each CORESET includes at least one TCI state.
The method for determining a TCI state of a transmission configuration indication according to claim 1, wherein the RRC signaling further carries a PDSCH configuration, and the PDSCH configuration includes N TCI state index values;

The determining the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH includes:

When the PDSCH is in the SFN transmission mode and N is greater than or equal to 2, the TCI states corresponding to the first two TCI state index values in the N TCI state index values are determined as the two TCIs corresponding to the PDSCH state;

In the case that the PDSCH is the SFN transmission mode and the value of N is 1, the TCI state of the synchronization signal block SSB/channel state information CSI-reference signal RS during random access is determined as a TCI corresponding to the PDSCH state.
The method for determining a TCI state of a transmission configuration indication according to claim 2, wherein after determining the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, the method further comprises:

When N is greater than or equal to 2, receive two default beams sent by the network device through the two TCI states corresponding to the PDSCH respectively;

When the value of N is 1, a default beam sent by the network device is received through a TCI state corresponding to the PDSCH.
The method for determining a TCI state of a transmission configuration indication according to claim 1, wherein the determining the TCI state corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH comprises:

When the target transmission mode corresponding to the PDCCH is a non-SFN transmission mode, the TCI state of the synchronization signal block SSB/channel state information CSI-reference signal RS during random access is determined as a TCI state corresponding to the PDCCH ;

When the target transmission mode corresponding to the PDCCH is the SFN transmission mode, for each CORESET configuration including a TCI state index value, the TCI state of the SSB/CSI-RS during random access is determined to be the same as the current CORESET configuration The TCI state corresponding to the corresponding CORESET, for each CORESET configuration including at least two TCI state index values, determine the TCI state corresponding to the first two TCI state index values in the current CORESET configuration as the CORESET corresponding to the current CORESET configuration The corresponding TCI state, the TCI state corresponding to the PDCCH includes the TCI state corresponding to each CORESET.
The method for determining a TCI state of a transmission configuration indication according to claim 4, wherein after determining the TCI state corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH, the method further comprises:

In the case that the PDCCH is a non-SFN transmission mode, receiving a default beam sent by the network device through a TCI state corresponding to the PDCCH;

When the PDCCH is the SFN transmission mode, for each CORESET, one or two default beams sent by the network device are received through the corresponding TCI state.
The method for determining a TCI state of a transmission configuration indication according to claim 1, wherein the determination of the TCI status corresponding to PDSCH, including:

Determine K CORESETs corresponding to the target bandwidth part BWP from the M CORESETs, where the target BWP is the BWP corresponding to the terminal device, and K is an integer greater than or equal to 1 and less than or equal to 3;

After the K CORESETs are determined, L reference CORESETs are determined according to the preset strategy, where L is an integer greater than or equal to 1 and less than or equal to K;

When the target enable parameter is not carried in the RRC signaling, according to the first CORESET selection rule and the first TCI state selection rule, determine the TCI corresponding to the PDSCH in the TCI states corresponding to the L reference CORESETs state;

When the target enable parameter is carried in the RRC signaling, according to the second CORESET selection rule and the second TCI state selection rule, determine the TCI state corresponding to the PDSCH among the TCI states corresponding to the L reference CORESETs .
The method for determining a TCI state of a transmission configuration indication according to claim 6, wherein the CORESET configuration further includes a CORESET index value and an association between a search space set SS Set in the current CORESET and SS Sets in other CORESETs;

The L reference CORESETs are determined according to the preset strategy, including:

Detecting whether there is a first CORESET in the K CORESETs, where the first CORESET includes two TCI states;

In the presence of the first CORESET, determine that the first CORESET is the reference CORESET, and the number of the first CORESET is greater than or equal to 1 and less than or equal to K;

In the absence of the first CORESET, detect whether there are two second CORESETs associated with the SS set at the same moment in the K CORESETs;

In the presence of two of the second CORESETs, determining that the two second CORESETs are two of the reference CORESETs, and the second CORESETs include one TCI state;

In the case where there are no two second CORESETs, it is detected whether there is a third CORESET in the K CORESETs, the SS Set in the third CORESET and the P CORESETs corresponding to the target BWP at another moment. The SS Set in the fourth CORESET forms an association, and P is an integer greater than or equal to 1 and less than or equal to 3;

In the presence of the third CORESET, it is determined that the third CORESET and the fourth CORESET are two of the reference CORESETs, and both the third CORESET and the fourth CORESET include one TCI state.
The method for determining a TCI state of a transmission configuration indication according to claim 7, wherein, according to the first CORESET selection rule and the first TCI state selection rule, determining the TCI states corresponding to the L reference CORESETs The TCI state corresponding to the PDSCH, including:

According to the CORESET index value corresponding to each of the reference CORESETs, a first target CORESET is selected from the L reference CORESETs, and a TCI state is selected from the first target CORESET to determine the TCI corresponding to the PDSCH state.
The method for determining a TCI state of a transmission configuration indication according to claim 8, wherein the first CORESET is the reference CORESET;

According to the CORESET index value corresponding to each of the reference CORESETs, a first target CORESET is selected from the L reference CORESETs, and a TCI state is selected from the first target CORESET to determine that the PDSCH corresponds to the TCI status, including:

determining the first CORESET corresponding to the lowest CORESET index value among the L first CORESETs as the first target CORESET;

Determine the first TCI state or the second TCI state in the first target CORESET as the TCI state corresponding to the PDSCH.
The method for determining a TCI state of a transmission configuration indication according to claim 8, characterized in that, in the case that two of the second CORESETs are two of the reference CORESETs;

According to the CORESET index value corresponding to each of the reference CORESETs, a first target CORESET is selected from the L reference CORESETs, and a TCI state is selected from the first target CORESET to determine that the PDSCH corresponds to the TCI status, including:

Determining the second CORESET corresponding to the lowest CORESET index value in the two second CORESETs as the first target CORESET, and determining the TCI state in the first target CORESET as the TCI state corresponding to the PDSCH .
The method for determining a TCI state of a transmission configuration indication according to claim 8, wherein the third CORESET and the fourth CORESET are two of the reference CORESETs;

According to the CORESET index value corresponding to each of the reference CORESETs, a first target CORESET is selected from the L reference CORESETs, and a TCI state is selected from the first target CORESET to determine that the PDSCH corresponds to the TCI status, including:

Determining the CORESET corresponding to the lowest CORESET index value in the third CORESET and the fourth CORESET as the first target CORESET, and determining the TCI state in the first target CORESET as the TCI state corresponding to the PDSCH .
The method for determining a TCI state of a transmission configuration indication according to claim 7, wherein the TCI state corresponding to the L reference CORESETs is determined according to the second CORESET selection rule and the second TCI state selection rule. The TCI state corresponding to the PDSCH, including:

In the case that the reference CORESET is the first CORESET, a second target CORESET is selected from the L reference CORESETs according to the CORESET index value corresponding to each of the reference CORESETs, and the second target CORESET is The two TCI states in are determined to be the TCI states corresponding to the PDSCH;

When the reference CORESET is the second CORESET or the reference CORESET is the third CORESET and the fourth CORESET, the two reference CORESETs are determined as two second CORESETs according to the SS set association principle The target CORESET combines the TCI states in the two second target CORESETs, and determines the combined two TCI states as the TCI states corresponding to the PDSCH.
The method for determining a TCI state of a transmission configuration indication according to claim 12, wherein the selecting a second target CORESET from the L reference CORESETs according to the CORESET index value corresponding to each of the reference CORESETs, include;

The reference CORESET corresponding to the lowest CORESET index value among the L reference CORESETs is determined as the second target CORESET.
The method for determining a TCI state of a transmission configuration indication according to claim 1, wherein after receiving the activation information of the MAC-CE and determining the TCI state corresponding to the PDSCH, the method further comprises:

Receive a default beam sent by the network device within the time interval by using the determined TCI state corresponding to the PDSCH; or

The two default beams sent by the network device are respectively received within the time interval by using the determined two TCI states corresponding to the PDSCH.
A terminal device, characterized in that it includes a memory, a transceiver, and a processor;

The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

Control the transceiver to receive the radio resource control RRC signaling sent by the network device, the RRC signaling carries the CORESET configuration of M control resource sets, the single frequency network SFN transmission mode corresponding to the downlink shared channel PDSCH, and the downlink control channel PDCCH. Target transmission mode, the CORESET configuration includes time-frequency resource locations and N TCI state index values, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1 and less than or equal to 128;

Before the transceiver receives the activation information of the medium access control MAC-control element CE sent by the network device, the transceiver determines the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH, and determines the TCI state corresponding to the PDSCH according to the corresponding SFN transmission mode of the PDSCH. The target transmission mode determines the TCI state corresponding to the PDCCH;

When the transceiver receives the activation information of the MAC-CE and the time interval between receiving the downlink control information DCI and receiving the PDSCH scheduled by the transceiver is less than a preset threshold, according to whether the RRC signaling carries the target enable parameter situation, CORESET selection rule and TCI state selection rule, determine the TCI state corresponding to the PDSCH;

The target enable parameter is used to indicate that two default TCI states are enabled, the preset threshold is quasi-co-located QCL duration, and the terminal device determines M CORESETs according to the M time-frequency resource positions, each The TCI state index value corresponds to a TCI state, and each CORESET includes at least one TCI state.
The terminal device according to claim 15, wherein the RRC signaling further carries a PDSCH configuration, and the PDSCH configuration includes N TCI state index values; the processor is further configured to perform the following operations:

When the PDSCH is in the SFN transmission mode and N is greater than or equal to 2, the TCI states corresponding to the first two TCI state index values in the N TCI state index values are determined as the two TCIs corresponding to the PDSCH state;

In the case that the PDSCH is the SFN transmission mode and the value of N is 1, the TCI state of the synchronization signal block SSB/channel state information CSI-reference signal RS during random access is determined as a TCI corresponding to the PDSCH state.
The terminal device according to claim 16, wherein after the TCI state corresponding to the PDSCH is determined according to the SFN transmission mode corresponding to the PDSCH, the processor is further configured to perform the following operations:

When N is greater than or equal to 2, controlling the transceiver to receive the two default beams sent by the network device through the two TCI states corresponding to the PDSCH respectively;

When the value of N is 1, the transceiver is controlled to receive a default beam sent by the network device through a TCI state corresponding to the PDSCH.
The terminal device according to claim 15, wherein the processor is further configured to perform the following operations:

When the target transmission mode corresponding to the PDCCH is a non-SFN transmission mode, the TCI state of the synchronization signal block SSB/channel state information CSI-reference signal RS during random access is determined as a TCI state corresponding to the PDCCH ;

When the target transmission mode corresponding to the PDCCH is the SFN transmission mode, for each CORESET configuration including a TCI state index value, the TCI state of the SSB/CSI-RS during random access is determined to be the same as the current CORESET configuration The TCI state corresponding to the corresponding CORESET, for each CORESET configuration including at least two TCI state index values, determine the TCI state corresponding to the first two TCI state index values in the current CORESET configuration as the CORESET corresponding to the current CORESET configuration The corresponding TCI state, the TCI state corresponding to the PDCCH includes the TCI state corresponding to each CORESET.
The terminal device according to claim 18, wherein after the TCI state corresponding to the PDCCH is determined according to the target transmission mode corresponding to the PDCCH, the processor is further configured to perform the following operations:

In the case that the PDCCH is a non-SFN transmission mode, controlling the transceiver to receive a default beam sent by the network device through a TCI state corresponding to the PDCCH;

When the PDCCH is the SFN transmission mode, for each CORESET, the transceiver is controlled to receive one or two default beams sent by the network device through the corresponding TCI state.
The terminal device according to claim 15, wherein the processor is further configured to perform the following operations:

Determine K CORESETs corresponding to the target bandwidth part BWP from the M CORESETs, where the target BWP is the BWP corresponding to the terminal device, and K is an integer greater than or equal to 1 and less than or equal to 3;

After the K CORESETs are determined, L reference CORESETs are determined according to the preset strategy, where L is an integer greater than or equal to 1 and less than or equal to K;

When the target enable parameter is not carried in the RRC signaling, according to the first CORESET selection rule and the first TCI state selection rule, determine the TCI corresponding to the PDSCH in the TCI states corresponding to the L reference CORESETs state;

When the target enable parameter is carried in the RRC signaling, according to the second CORESET selection rule and the second TCI state selection rule, determine the TCI state corresponding to the PDSCH among the TCI states corresponding to the L reference CORESETs .
The terminal device according to claim 20, wherein the CORESET configuration further includes a CORESET index value and an association between a search space set SSSet in the current CORESET and SS Sets in other CORESETs;

The processor is also configured to perform the following operations:

Detecting whether there is a first CORESET in the K CORESETs, where the first CORESET includes two TCI states;

In the presence of the first CORESET, determine that the first CORESET is the reference CORESET, and the number of the first CORESET is greater than or equal to 1 and less than or equal to K;

In the absence of the first CORESET, detect whether there are two second CORESETs associated with the SS set at the same moment in the K CORESETs;

In the presence of two of the second CORESETs, determining that the two second CORESETs are two of the reference CORESETs, and the second CORESETs include one TCI state;

In the case where there are no two second CORESETs, it is detected whether there is a third CORESET in the K CORESETs, the SS Set in the third CORESET and the P CORESETs corresponding to the target BWP at another moment. The SS Set in the fourth CORESET forms an association, and P is an integer greater than or equal to 1 and less than or equal to 3;

In the presence of the third CORESET, it is determined that the third CORESET and the fourth CORESET are two of the reference CORESETs, and each of the third CORESET and the fourth CORESET includes one TCI state.
The terminal device according to claim 21, wherein the processor is further configured to perform the following operations:

According to the CORESET index value corresponding to each of the reference CORESETs, a first target CORESET is selected from the L reference CORESETs, and a TCI state is selected from the first target CORESET to determine the TCI corresponding to the PDSCH state.
The terminal device according to claim 22, wherein, when the first CORESET is the reference CORESET;

The processor is also configured to perform the following operations:

determining the first CORESET corresponding to the lowest CORESET index value among the L first CORESETs as the first target CORESET;

Determine the first TCI state or the second TCI state in the first target CORESET as the TCI state corresponding to the PDSCH.
The terminal device according to claim 22, wherein, in the case that two of the second CORESETs are two of the reference CORESETs;

The processor is also configured to perform the following operations:

Determining the second CORESET corresponding to the lowest CORESET index value in the two second CORESETs as the first target CORESET, and determining the TCI state in the first target CORESET as the TCI state corresponding to the PDSCH .
The terminal device according to claim 22, wherein, in the case that the third CORESET and the fourth CORESET are two of the reference CORESETs;

The processor is also configured to perform the following operations:

Determining the CORESET corresponding to the lowest CORESET index value in the third CORESET and the fourth CORESET as the first target CORESET, and determining the TCI state in the first target CORESET as the TCI state corresponding to the PDSCH .
The terminal device according to claim 21, wherein the processor is further configured to perform the following operations:

In the case that the reference CORESET is the first CORESET, a second target CORESET is selected from the L reference CORESETs according to the CORESET index value corresponding to each of the reference CORESETs, and the second target CORESET is The two TCI states in are determined to be the TCI states corresponding to the PDSCH;

When the reference CORESET is the second CORESET or the reference CORESET is the third CORESET and the fourth CORESET, the two reference CORESETs are determined as two second CORESETs according to the SS set association principle The target CORESET combines the TCI states in the two second target CORESETs, and determines the combined two TCI states as the TCI states corresponding to the PDSCH.
The terminal device according to claim 26, wherein the processor is further configured to perform the following operations:

The reference CORESET corresponding to the lowest CORESET index value among the L reference CORESETs is determined as the second target CORESET.
The terminal device according to claim 15, wherein after the transceiver receives the activation information of the MAC-CE and the processor determines the TCI state corresponding to the PDSCH, the processor further uses to do the following:

Controlling the transceiver to receive a default beam sent by the network device within the time interval through a determined TCI state corresponding to the PDSCH; or

The transceiver is controlled to respectively receive two default beams sent by the network device within the time interval through the determined two TCI states corresponding to the PDSCH.
A device for determining a TCI state of a transmission configuration indication, applied to a terminal device, is characterized in that, comprising:

The first receiving module is used to receive the radio resource control RRC signaling sent by the network device, where the RRC signaling carries the CORESET configuration of M control resource sets, the single frequency network SFN transmission mode corresponding to the downlink shared channel PDSCH, and the downlink control channel PDCCH The corresponding target transmission mode, the CORESET configuration includes time-frequency resource locations and N TCI state index values, where M is an integer greater than or equal to 1, and N is an integer greater than or equal to 1 and less than or equal to 128;

The first determining module is configured to determine the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH before receiving the activation information of the medium access control MAC-control element CE sent by the network device, and according to the The target transmission mode corresponding to the PDCCH determines the TCI state corresponding to the PDCCH;

The second determination module is configured to, when the activation information of the MAC-CE is received and the time interval between receiving the downlink control information DCI and receiving the PDSCH scheduled by the MAC-CE is less than a preset threshold, according to whether the RRC signaling carries the target command The condition of the parameters, the CORESET selection rule and the TCI state selection rule, determine the TCI state corresponding to the PDSCH;

The target enable parameter is used to indicate that two default TCI states are enabled, the preset threshold is quasi-co-located QCL duration, and the terminal device determines M CORESETs according to the M time-frequency resource positions, each The TCI state index value corresponds to a TCI state, and each CORESET includes at least one TCI state.
A processor-readable storage medium, wherein the processor-readable storage medium stores a computer program, and when the computer program is executed by a processor, the transmission configuration according to any one of claims 1 to 14 is implemented Indicates the method for determining the TCI status.
A computer program comprising computer readable code, characterized in that, when the computer readable code is executed on a computing processing device, it causes the computing processing device to perform the transmission as claimed in any one of claims 1 to 14 Configure the determination method to indicate the TCI status.