CN115189821A

CN115189821A - Method and device for determining Transmission Configuration Indication (TCI) state and terminal equipment

Info

Publication number: CN115189821A
Application number: CN202110358443.8A
Authority: CN
Inventors: 卢艺文; 黄秋萍; 苏昕; 高秋彬
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2021-04-01
Filing date: 2021-04-01
Publication date: 2022-10-14
Anticipated expiration: 2041-04-01
Also published as: CN115189821B; TW202241106A; TWI795261B; WO2022206489A1

Abstract

The embodiment of the application provides a method, a device and a terminal device for determining a Transmission Configuration Indication (TCI) state, wherein the method comprises the following steps: receiving RRC signaling sent by network equipment; before receiving the activation information of the MAC-CE, determining a TCI state corresponding to a PDSCH according to an SFN transmission mode corresponding to the PDSCH in an RRC signaling, and determining a TCI state corresponding to a PDCCH according to a target transmission mode corresponding to the PDCCH in the RRC signaling; and under the condition that the activation information of the MAC-CE is received and the time interval between the DCI and the PDSCH scheduled by the DCI is received is smaller than a preset threshold, determining the TCI state corresponding to the PDSCH according to the condition that whether the RRC signaling carries the target enabling parameter, the CORESET selection rule and the TCI state selection rule. The method and the device can ensure correct reception of the PDSCH and PDCCH data.

Description

Method and device for determining Transmission Configuration Indication (TCI) state and terminal equipment

Technical Field

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

Background

In Rel-16, when a time interval between receiving Downlink Control Information (DCI) and receiving a Downlink shared Channel (PDSCH) scheduled by the DCI is less than a threshold (Quasi co-location (QCL) duration), a terminal device temporarily does not decode the DCI scheduling the PDSCH, and at this time, a default receiving beam of the terminal device may be determined according to whether an RRC signaling received by the terminal device carries a target enable parameter (for indicating two default TCI state enables):

1. if the Radio Resource Control (RRC) signaling does not carry the target enabling parameter, according to the current protocol, the terminal device may directly select a Transmission Configuration Indicator (TCI) state of a Control Resource Set (Control Resource Set, core) with a lowest index value (lowest ID) in a Bandwidth Part (BWP) as a default receiving beam of the terminal device.

2. If the RRC signaling carries the target enabling parameter, according to the current protocol, the terminal device may directly select a codepoint (codepoint) with a lowest ID from codepoints with two TCI states as two default receiving beams of the terminal device.

In Rel-16, the problem of the default reception beam of a Physical Downlink Control Channel (PDCCH) mainly exists in the following two cases.

1. For the condition that the received PDCCH is before RRC configuration, according to the current protocol, the terminal device may determine a default receiving beam of the PDCCH according to a Synchronization Signal and PBCH block (SSB)/Channel State Information (CSI) -Reference Signal (RS) in a random access process.

2. For a case that a TCI state of a PDCCH is not activated for a time by a Medium Access Control (MAC) Control Element (CE) after RRC configuration of a received PDCCH, according to a current protocol, a terminal device may determine a default receiving beam of the PDCCH according to an SSB/CSI-RS in a random Access process.

In Rel-16, the PDSCH supports the Transmission scheme of Space Division Multiplexing (SDM) 1a of Multiple Transmission and Reception points (M-TRP), that is, all Demodulation Reference Signal (DMRS) ports of the PDSCH are arranged in two Code Division Multiplexing (CDM) groups, and a TCI Code including two TCI states is indicated, where the first TCI state is associated with a CDM group corresponding to a first antenna port of the antenna ports indicated by the DCI scheduling the PDSCH, and the second TCI state is associated with a CDM group corresponding to another DMRS port. In Rel-16, M-TRP transmission of PDCCH is temporarily not supported.

In view of the above situation, in Rel-17, a new PDCCH transmission scheme of M-TRP is to be added, that is, a PDCCH transmission scheme of repeat transmission, where Search Space (SS) Set in two repeat-transmitted CORESET can be configured by RRC configuration in an associated manner, and two CORESETs including two SS sets associated with each other transmit the same DCI. The repeated transmission may transmit the same downlink control information through Frequency Division Multiplexing (FDM) or Time Division Multiplexing (TDM).

In Rel-17, a PDSCH/PDCCH Single Frequency Network (SFN) transmission scheme is also proposed to add a new M-TRP, wherein the data layer of the PDSCH/PDCCH and the channels of the DMRS ports of the PDSCH/PDCCH have a QCL relationship with respect to at least one channel large scale parameter with one or more QCL reference signals. Thus, the data layer of the PDSCH/PDCCH and the DMRS ports of the PDSCH/PDCCH are from multiple TRP transmissions.

In summary, for PDSCH, when the time interval between receiving DCI and receiving PDSCH scheduled by the DCI (corresponding to SFN transmission mode) is less than the threshold (QCL duration), it can be distinguished according to whether the RRC signaling received by the terminal device carries target enabling parameters (for indicating two default TCI status enables): if the RRC signaling does not carry the target enabling parameter, the receiving beam at this time has only one TCI state. Then there are 2 TCI states for the lowest ID core set of the PDCCH when the PDCCH is SFN transmission. Therefore, a default reception beam of the PDSCH, i.e., the TCI state of the PDSCH, cannot be determined according to the existing rule. If the RRC signaling carries the target enabling parameter, two TCI states are directly selected from the codepoint of the lowest ID after the MAC-CE activation according to the existing rule, instead of selecting the optimal TCI state, so that the PDSCH data cannot be accurately demodulated, and the performance is greatly reduced.

For the PDCCH, according to the current conclusion, the PDCCH is intended to receive the SFN transmission scheme through RRC configuration, but if the MAC-CE temporarily does not activate the TCI state of the PDCCH at this time, based on the existing determination method (when the TCI state of the SSB/CSI-RS in the random access process is adopted), only one TCI state can be determined, and 2 TCI states of the PDCCH cannot be determined.

Therefore, when the PDSCH supports the SFN transmission scheme and the PDCCH supports the SFN transmission scheme or the non-SFN transmission scheme, how to determine the TCI state is an urgent problem to be solved.

Disclosure of Invention

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

In a first aspect, an embodiment of the present application provides a method for determining a TCI status of a transmission configuration indicator, where the method is applied to a terminal device, and includes:

receiving a Radio Resource Control (RRC) signaling sent by network equipment, wherein the RRC signaling carries M control resource set (CORESET) configurations, a single-frequency network (SFN) transmission mode corresponding to a downlink shared channel (PDSCH) and a target transmission mode corresponding to a downlink control channel (PDCCH), the CORESET configurations comprise time-frequency resource positions and N TCI state index values, 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 activation information of a Media Access Control (MAC) -control unit (CE) sent by the network equipment, determining a TCI state corresponding to the PDSCH according to an SFN transmission mode corresponding to the PDSCH, and determining the TCI state corresponding to the PDCCH according to a target transmission mode corresponding to the PDCCH;

when the time interval between receiving the activation information of the MAC-CE and receiving the downlink control information DCI and receiving the PDSCH scheduled by the downlink control information DCI is smaller than a preset threshold, determining a TCI state corresponding to the PDSCH according to the condition whether the RRC signaling carries a target enabling parameter, a CORESET selection rule and a TCI state selection rule;

the target enabling parameter is used for indicating two default TCI state enables, the preset threshold is duration of a quasi co-location QCL, the terminal device determines M CORESETs according to M time-frequency resource positions, each TCI state index value corresponds to one TCI state, and each CORESET comprises at least one TCI state.

Optionally, the RRC signaling further carries a PDSCH configuration, where 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 comprises the following steps:

determining the TCI states corresponding to the first two TCI state index values in the N TCI state index values as two TCI states corresponding to the PDSCH under the condition that the PDSCH is in an SFN transmission mode and N is greater than or equal to 2;

and under the condition that the PDSCH is in an SFN transmission mode and the value of N is 1, determining the TCI state of a synchronous signal block SSB/channel state information CSI-reference signal RS during random access as a TCI state corresponding to the PDSCH.

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

under the condition that N is greater than or equal to 2, respectively receiving two default beams sent by the network equipment through two TCI states corresponding to the PDSCH;

and receiving a default beam sent by the network equipment through a TCI state corresponding to the PDSCH under the condition that the value of N is 1.

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

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

and under the condition that the target transmission mode corresponding to the PDCCH is an SFN transmission mode, determining the TCI state of the SSB/CSI-RS during random access as the TCI state corresponding to the CORESET corresponding to the current CORESET configuration aiming at each CORESET configuration comprising one TCI state index value, and determining the TCI state respectively 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 aiming at each CORESET configuration comprising at least two TCI state index values, wherein the TCI state corresponding to the PDCCH comprises the TCI state corresponding to each CORESET.

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

receiving a default beam sent by the network equipment through a TCI state corresponding to the PDCCH under the condition that the PDCCH is in a non-SFN transmission mode;

and under the condition that the PDCCH is in an SFN transmission mode, receiving one or two default beams sent by the network equipment through a corresponding TCI state aiming at each CORESET.

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

determining K CORESETs corresponding to a target bandwidth part BWP in the M CORESETs, wherein the target BWP is the BWP corresponding to the terminal equipment, and K is an integer greater than or equal to 1 and less than or equal to 3;

after K CORESETs are determined, L reference CORESETs are determined according to a preset strategy, wherein L is an integer which is greater than or equal to 1 and less than or equal to K;

when the target enabling parameter is not carried in the RRC signaling, determining a TCI state corresponding to the PDSCH from the TCI states corresponding to the L reference CORESET according to a first CORESET selection rule and a first TCI state selection rule;

and when the target enabling parameter is carried in the RRC signaling, determining the TCI state corresponding to the PDSCH in the TCI states corresponding to the L reference CORESET according to a second CORESET selection rule and a second TCI state selection rule.

Optionally, the CORESET configuration further includes a CORESET index value and an association between the current CORESET intra-search space SS Set and other CORESET intra-search spaces SS Set;

the method for determining L reference CORESET according to the preset strategy comprises the following steps:

detecting whether a first CORESET exists in K CORESETs, wherein the first CORESET comprises two TCI states;

in the case of existence of the first CORESET, determining the first CORESET as the reference CORESET, wherein the number of the first CORESET is greater than or equal to 1 and less than or equal to K;

in the absence of said first CORESET, detecting whether there are two second CORESETs of K CORESETs associated at the same instant SS set;

in the case that there are two of the second CORESETs, determining that the two of the second CORESETs are two of the reference CORESETs, and the second CORESET comprises one TCI state;

under the condition that two second CORESETs do not exist, detecting whether a third CORESET exists in K CORESETs, wherein SS Set in the third CORESET forms a correlation with SS Set in a fourth CORESET in P CORESETs corresponding to the target BWP at another moment, 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, determining the third CORESET and the fourth CORESET as two of the reference CORESETs, the third CORESET and the fourth CORESET each including one TCI state.

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

and selecting a first target CORESET from the L reference CORESETs according to the CORESET index value corresponding to each reference CORESET, and selecting a TCI state from the first target CORESET to determine the TCI state corresponding to the PDSCH.

Optionally, 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 reference CORESET, and selecting a TCI state from the first target CORESET to determine the TCI state corresponding to the PDSCH, including:

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

and determining a first TCI state or a second TCI state in the first target CORESET as a TCI state corresponding to the PDSCH.

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

selecting a first target CORESET from the L reference CORESETs according to the CORESET index value corresponding to each reference CORESET respectively, and selecting a TCI state from the first target CORESET to determine the TCI state corresponding to the PDSCH, wherein the method comprises the following steps:

and 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, the determining, according to a second CORESET selection rule and a second TCI state selection rule, a TCI state corresponding to the PDSCH from among the TCI states corresponding to the L reference CORESETs includes:

under the condition that the reference CORESET is the first CORESET, selecting a second target CORESET from the L reference CORESETs according to the CORESET index value corresponding to each reference CORESET respectively, and determining two TCI states in the second target CORESET as TCI states corresponding to the PDSCH;

and under the condition that the reference CORESET is the second CORESET or the reference CORESET is the third CORESET and the fourth CORESET, determining the two reference CORESETs as two second target CORESETs according to an SS set association principle, combining TCI states in the two second target CORESETs, and determining the two combined TCI states as TCI states corresponding to the PDSCH.

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

and determining the reference CORESET corresponding to the lowest CORESET index value in the L reference CORESETs as the second target CORESET.

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

receiving a default beam transmitted by the network equipment in the time interval through the determined TCI state corresponding to the PDSCH; or alternatively

And respectively receiving two default beams transmitted by the network equipment in the time interval through the determined two TCI states corresponding to the PDSCH.

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

the memory for storing a computer program; the transceiver is used for transceiving data under the control of the processor; the processor is used for reading the computer program in the memory and executing the following operations:

controlling the transceiver to receive a Radio Resource Control (RRC) signaling sent by a network device, wherein the RRC signaling carries M control resource set (CORESET) configurations, a Single Frequency Network (SFN) transmission mode corresponding to a downlink shared channel (PDSCH) and a target transmission mode corresponding to a downlink control channel (PDCCH), the CORESET configurations comprise time-frequency resource positions and N TCI state index values, 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 activation information of a Media Access Control (MAC) -control unit (CE) sent by the network equipment, determining a TCI state corresponding to the PDSCH according to an SFN transmission mode corresponding to the PDSCH and determining the TCI state corresponding to the PDCCH according to a target transmission mode corresponding to the PDCCH;

when the transceiver receives the activation information of the MAC-CE and the time interval between the reception of the downlink control information DCI and the reception of the PDSCH scheduled by the downlink control information DCI is smaller than a preset threshold, determining a TCI state corresponding to the PDSCH according to the condition whether the RRC signaling carries a target enabling parameter, a CORESET selection rule and a TCI state selection rule;

Optionally, the RRC signaling further carries a PDSCH configuration, where 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:

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

and under the condition that the value of N is 1, controlling the transceiver to receive a default beam sent by the network equipment through a TCI state corresponding to the PDSCH.

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

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

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

controlling the transceiver to receive a default beam sent by the network equipment through a TCI state corresponding to the PDCCH when the PDCCH is in a non-SFN transmission mode;

and under the condition that the PDCCH is in an SFN transmission mode, controlling the transceiver to receive one or two default beams transmitted by the network equipment through the corresponding TCI state aiming at each CORESET.

and when the target enabling parameter is carried in the RRC signaling, determining the TCI state corresponding to the PDSCH from the TCI states corresponding to the L reference CORESET according to a second CORESET selection rule and a second TCI state selection rule.

the processor is further configured to perform the following operations:

determining the first CORESET as the reference CORESET under the condition that the first CORESET exists, wherein the number of the first CORESET is greater than or equal to 1 and less than or equal to K;

in the absence of said first CORESET, detecting whether there are two second CORESETs of K CORESETs with which the SS set forms a correlation at the same instant;

in the case of the presence of two of said second CORESET, determining that two of said second CORESET are two of said reference CORESETs, said second CORESET comprising one TCI state;

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

the processor is further 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.

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

the processor is further configured to perform the following operations:

under the condition that the reference CORESET is the first CORESET, selecting a second target CORESET from the L reference CORESETs according to the CORESET index value corresponding to each reference CORESET, and determining two TCI states in the second target CORESET as TCI states corresponding to the PDSCH;

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:

controlling the transceiver to receive a default beam transmitted by the network device in the time interval through a determined TCI state corresponding to the PDSCH; or alternatively

And controlling the transceiver to respectively receive two default beams transmitted by the network equipment in the time interval through the determined two TCI states corresponding to the PDSCH.

In a third aspect, an embodiment of the present application further provides a device for determining a TCI status of a transmission configuration indicator, where the device is applied to a terminal device, and the device includes:

a first receiving module, configured to receive a radio resource control RRC signaling sent by a network device, where the RRC signaling carries M control resource sets, a single frequency network SFN transmission mode corresponding to a downlink shared channel PDSCH, and a target transmission mode corresponding to a downlink control channel PDCCH, the CORESET configuration includes a time-frequency resource location and N TCI state index values, 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;

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

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

In a fourth aspect, the present application further provides a processor-readable storage medium, where the processor-readable storage medium stores a computer program, where the computer program is configured to enable the processor to execute the method for determining a TCI status of a transmission configuration indicator described above.

In the embodiment of the application, when the PDSCH is in SFN transmission, before receiving the activation information of the MAC-CE, the TCI state of the PDSCH can be determined according to PDSCH configuration, and the TCI state of the PDCCH can be determined according to different transmission modes of the PDCCH, and 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 enabling parameter, so that correct reception of PDSCH and PDCCH data is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a schematic diagram illustrating a method for determining a TCI status of a transmission configuration indicator according to an embodiment of the present application;

FIG. 2a is a schematic diagram I of the CORESET corresponding to the target BWP in the embodiment of the present application;

FIG. 2b is a schematic diagram of CORESET corresponding to the target BWP in the embodiment of the present application;

FIG. 3 is a diagram illustrating SS Set association formed at the same time by the CORESET in the target BWP according to the embodiment of the present application;

FIG. 4 is a schematic diagram illustrating SS Set association formed at different times by the CORESET in the target BWP according to an embodiment of the present application;

FIG. 5 is a second schematic diagram illustrating SS Set associations formed at different times by the CORESET in the target BWP according to the embodiment of the present application;

FIG. 6 is a diagram illustrating SS Set association formed at different times and the same time of CORESET in a target BWP according to an embodiment of the present application;

FIG. 7 is a diagram illustrating an apparatus for determining a TCI status of a transmission configuration indicator according to an embodiment of the present application;

fig. 8 is a block diagram of a terminal device according to an embodiment of the present application.

Detailed Description

In the embodiment of the present application, the term "and/or" describes an association relationship of associated objects, and indicates that three relationships may exist, for example, a and/or B, and may indicate: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

In the embodiments of the present application, the term "plurality" means two or more, and other terms are similar thereto.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides a method and a device for determining a TCI state of a transmission configuration indication, which are used for determining the TCI state of a PDSCH according to an SFN transmission mode of the PDSCH and determining the TCI state of the PDCCH according to a target transmission mode of the PDCCH before receiving activation information of an MAC-CE, and after receiving the activation information of the MAC-CE, determining the TCI state of the PDSCH dynamically according to the condition that whether terminal equipment receives a target enabling parameter or not, so that correct receiving of PDSCH and PDCCH data is ensured.

The method and the device are based on the same application concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.

In addition, the technical scheme provided by the embodiment of the application can be suitable for various systems, especially 5G systems. For example, suitable systems may be global system for mobile communications (GSM) systems, code Division Multiple Access (CDMA) systems, wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) systems, long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD) systems, long term evolution (long term evolution) systems, LTE-a systems, universal mobile systems (universal mobile telecommunications systems, UMTS), universal internet Access (world interoperability for microwave Access (WiMAX) systems, new Radio systems, new G5 (New NR) systems, and the like. These various systems include terminal devices and network devices. The System may further include a core network portion, such as an Evolved Packet System (EPS), a 5G System (5 GS), and the like.

The terminal device referred to in the embodiments of the present application may be a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. The names of the terminal devices may also be different in different systems, for example in a 5G system, a terminal device may be referred to as a user equipment. A wireless terminal device, which may be a mobile terminal device such as a mobile telephone (or "cellular" telephone) and a computer having a mobile terminal device, e.g., a portable, pocket, hand-held, computer-included or vehicle-mounted mobile device, may communicate with one or more Core Networks (CNs) via a Radio Access Network (RAN), and may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a remote station (remote station), an access point (access point), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), and a user device (user device), which is not limited in this embodiment.

The network device according to the embodiment of the present application may be a base station, and the base station may include a plurality of cells for providing services to a terminal. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to exchange received air frames with Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or a Code Division Multiple Access (CDMA), may also be a network device (NodeB) in a Wide-band Code Division Multiple Access (WCDMA), may also be an evolved Node B (eNB or e-NodeB) in a Long Term Evolution (LTE) System, a 5G Base Station (gNB) in a 5G network architecture (next generation System), may also be a Home evolved Node B (HeNB), a relay Node (relay Node), a Home Base Station (femto), a pico Base Station (pico) and the like, and the present application is not limited in this embodiment. In some network configurations, a network device may include Centralized Unit (CU) nodes and Distributed Unit (DU) nodes, which may also be geographically separated.

Multiple Input Multiple Output (MIMO) transmission may be performed between the network device and the terminal device by using one or more antennas, where the MIMO transmission may be Single User MIMO (SU-MIMO) or Multi-User MIMO (MU-MIMO). According to the form and the number of the root antenna combination, the MIMO transmission can be 2D-MIMO, 3D-MIMO, FD-MIMO or massive-MIMO, and can also be diversity transmission, precoding transmission, beamforming transmission, etc.

Referring to fig. 1, a method for determining a TCI status of a transmission configuration indicator applied to a terminal device according to an embodiment of the present application is described below, where the method includes:

step 101, receiving a radio resource control RRC signaling sent by a network device, where the RRC signaling carries M control resource set CORESET configurations, a single frequency network SFN transmission mode corresponding to a downlink shared channel PDSCH, and a target transmission mode corresponding to a downlink control channel PDCCH, where the CORESET configurations include time-frequency resource positions and N TCI state index values, 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 an RRC signaling sent by the network device, where the RRC signaling carries M (M is a positive integer and the minimum value is 1) CORESET configurations (corresponding to a certain time), an SFN transmission mode corresponding to the PDSCH, and a target transmission mode corresponding to the PDCCH, and the target transmission mode corresponding to the PDCCH may be SFN transmission or non-SFN transmission. For each CORESET configuration, the CORESET configuration may include a time-frequency resource location and N TCI state index values, where a value of N ranges from 1 to 128 (that is, N is 1 at the minimum and 128 at the maximum), and values of N may be different for different CORESET configurations.

Step 102, before receiving activation information of a Media Access Control (MAC) -control unit (CE) sent by the network device, determining a TCI state corresponding to the PDSCH according to an SFN transmission mode corresponding to the PDSCH, and determining the TCI state corresponding to the PDCCH according to a target transmission mode corresponding to the PDCCH.

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

Step 103, when the activation information of the MAC-CE is received and the time interval between the reception of the downlink control information DCI and the reception of the PDSCH scheduled by the downlink control information DCI is smaller than a preset threshold, determining the TCI state corresponding to the PDSCH according to the condition whether the RRC signaling carries the target enabling parameter, the CORESET selection rule, and the TCI state selection rule.

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

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

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

In this embodiment, the RRC signaling further carries PDSCH configuration, where the PDSCH configuration includes N TCI state index values;

In this embodiment, the RRC signaling further carries a PDSCH configuration, where the PDSCH configuration includes N TCI state index values, and a value range of N is 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 employed for different values of N.

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 may be determined as two TCI states corresponding to the PDSCH with respect to the N TCI state index values. When the PDSCH is in the SFN transmission mode and the value of N is 1, the TCI state of the SSB/CSI-RS during random access may be determined as one 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 determining the TCI status corresponding to the PDSCH, a default beam transmitted by the network device may be received according to the determined TCI status. Since one or two TCI states corresponding to the PDSCH can be determined according to different values of N in the PDSCH configuration before the PDSCH corresponds to SFN transmission and the terminal device receives the activation information of the MAC-CE, the situation of receiving the default beam can be distinguished for different values of N.

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

In the above embodiment of the present application, before receiving the activation information of the MAC-CE, an implementation process of determining the TCI state corresponding to the PDSCH and receiving the default beam sent by the network device is performed, and the TCI state corresponding to the PDSCH is determined in a corresponding manner according to different values of N in the PDSCH configuration, so that the determined TCI state is used to receive the default beam sent by the network device, and correct reception of PDSCH data can be ensured.

In the following, a description is given of a case of determining a TCI state corresponding to a PDCCH before receiving activation information of a MAC-CE, where in this embodiment, the determining the TCI state corresponding to the PDCCH according to a 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, it may first determine whether the target transmission mode corresponding to the PDCCH is an SFN transmission mode, and if the target transmission mode corresponding to the PDCCH is non-SFN transmission, it may directly determine the TCI state of the SSB/CSI-RS at the time of random access as one TCI state corresponding to the PDCCH.

If the target transmission mode corresponding to the PDCCH is SFN transmission, for M core set configurations, determining a core set configuration including one TCI state index value, determining a core set configuration including at least two TCI state index values, for each core set configuration including one TCI state index value, determining a TCI state of the SSB/CSI-RS at the time of random access as a TCI state corresponding to the core set corresponding to the current core set configuration, and for each core set configuration including at least two TCI state index values, determining a TCI state corresponding to each of the first two TCI state index values in the current core set configuration as a TCI state corresponding to the core set corresponding to the current core set configuration. For the PDCCH, the TCI state corresponding to the PDCCH includes a TCI state corresponding to each of the M core sets.

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

After determining the TCI status corresponding to the PDCCH, a default beam transmitted by the network device may be received according to the determined TCI status. Since the TCI status conditions determined by the terminal device according to different transmission modes corresponding to the PDCCH are different before receiving the activation information of the MAC-CE, the condition of receiving the default beam needs to be distinguished according to different transmission modes corresponding to the PDCCH.

Under the condition that the PDCCH is in a non-SFN transmission mode, a default beam sent by the network equipment can be received through a TCI state corresponding to the PDCCH; in the case that the PDCCH is in SFN transmission mode, since each core set may correspond to one or two TCI states, for each core set, one or two default beams transmitted by the network device are received through the corresponding TCI state.

In the embodiment of the application, before receiving the activation information of the MAC-CE, an implementation process of determining a TCI state corresponding to the PDCCH and receiving a default beam sent by the network device is performed, the TCI state corresponding to the PDCCH is determined according to a target transmission mode corresponding to the PDCCH, and then the determined TCI state is used to receive the default beam sent by the network device, so that correct receiving of PDCCH data can be ensured.

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

After receiving the activation information of the MAC-CE, when determining the TCI state corresponding to the PDSCH according to whether the terminal device receives the target enabling parameter (i.e., whether the RRC signaling carries the target enabling parameter), the CORESET selection rule, and the TCI state selection rule, K CORESETs corresponding to the target BWP may be determined among M CORESETs according to the target BWP corresponding to the terminal device, where a maximum value of K is 3 because 1 BWP corresponds to 3 CORESETs at most, and a minimum value of K is 1 because a minimum value of M is 1. Wherein each core set may include at most two TCI states after the activation of the MAC-CE, i.e., after receiving the activation information of the MAC-CE.

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

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

In the above process of the present application, K CORESETs corresponding to the target BWP are determined among the M CORESETs, L reference CORESETs are screened out based on a preset policy, and different policies are adopted according to the condition that whether the terminal device receives the target enabling parameter, so as to determine the TCI state corresponding to the PDSCH among the TCI states corresponding to the L reference CORESETs, thereby ensuring correct reception of PDSCH data.

The following describes a case where L reference CORESET is determined according to a preset policy. In this embodiment, the CORESET configuration further includes a CORESET index value and an association between the current CORESET intra-search space SS Set and other CORESET intra-search spaces SS Set;

the determining of the L reference CORESET according to the preset strategy comprises the following steps:

in the case that there are two of the second CORESETs, determining that the two of the second CORESETs are two of the reference CORESETs, the second CORESET including one TCI state, and the two second CORESETs including different TCI states;

under the condition that two second CORESETs do not exist, detecting whether a third CORESET exists in the K CORESETs, wherein SS Set in the third CORESET forms a correlation with SS Set in a fourth CORESET in the P CORESETs corresponding to the target BWP at another moment, 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, determining the third CORESET and the fourth CORESET as two of the reference CORESETs, the third CORESET and the fourth CORESET each including one TCI state, and the third CORESET and the fourth CORESET including different TCI states.

For each CORESET configuration, a CORESET index value and an association between the current CORESET intra-SS Set and other CORESET intra-SS sets may also be included.

In determining the L reference CORESET, the detection may be performed in the following detection order to determine the L reference CORESET: firstly, whether a first CORESET comprising two TCI states exists in K CORESETs is detected, if so, the first CORESET is determined as a reference CORESET, and at the moment, the number of the first CORESET is minimum 1 and maximum K, namely, the reference CORESET takes a value of minimum 1 and maximum K.

If not, detecting whether two second CORESETs which form a correlation with the SS set at the same time exist in the K CORESETs, if so, determining the second CORESETs as reference CORESETs, wherein the number of the second CORESETs is 2, namely the reference CORESET takes the value of 2, each second CORESET comprises a TCI state, and the two second CORESETs correspond to different TCI states.

If not, whether a third CORESET exists is detected in K CORESETs, SS Set in the third CORESET forms an association with SS Set in a fourth CORESET in P CORESETs corresponding to the target BWP at another moment, P is an integer which is greater than or equal to 1 and less than or equal to 3, and the values of P and K can be equal or unequal. If present, the third CORESET and the fourth CORESET are determined to be two reference CORESETs, i.e., the number of reference CORESETs is two. Wherein the third CORESET and the fourth CORESET each include one TCI state, and the third CORESET and the fourth CORESET correspond to different TCI states. That is, the two CORESET forming the SS Set association correspond to different TCI states.

The process comprises the steps of firstly detecting whether a first CORESET exists in K CORESETs, if not, detecting whether two second CORESETs exist in the K CORESETs, and if not, detecting whether a third CORESET exists in the K CORESETs. The L reference CORESETs can be determined through the detection, when a first CORESET exists in the K CORESETs, the number of the reference CORESETs is 1 to K, when the first CORESET does not exist in the K CORESETs and a second CORESET exists in the K CORESETs, the number of the reference CORESETs is 2, and when the first CORESET and the second CORESET do not exist in the K CORESETs and a third CORESET exists in the K CORESETs, the number of the reference CORESETs is 2. In this embodiment, the priorities of the first, second, and third CORESET are sequentially lowered.

In the implementation process of the present application, by sequentially performing the detection according to a specific order, the first core may be determined as the reference core preferentially, when the first core does not exist in the K core sets, the second core may be determined as the reference core, and when the second core does not exist in the K core sets, the third core and the fourth core may be determined as the reference core, so as to determine the reference core set according to the priority.

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

Since each core set configuration may further include a core set index value, when determining the TCI state corresponding to the PDSCH from among the TCI states corresponding to the L reference core sets according to the first core set selection rule and the first TCI state selection rule, a first target core set may be first selected from the L reference core sets according to the core set index value corresponding to each reference core set, and then, for the first target core set, a TCI state may be selected from the first target core set and determined as the TCI state corresponding to the PDSCH. That is, first, CORESET screening is performed based on the CORESET index value, and then, for the screened CORESET, the TCI state corresponding to the PDSCH is determined according to the TCI state corresponding to the CORESET.

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

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 manners of determining the TCI state corresponding to the PDSCH are different, and for different situations of the reference CORESET, the process of determining the TCI state corresponding to the PDSCH is described separately below.

When the first CORESET is the reference CORESET, selecting a first target CORESET from the L reference CORESETs according to a CORESET index value corresponding to each reference CORESET, and selecting a TCI state from the first target CORESET to determine the TCI state corresponding to the PDSCH, including:

If the first core set is the reference core set, when the first target core set is determined and the TCI state corresponding to the PDSCH is determined, for the L reference core sets, according to the core set index values, a first core set corresponding to the lowest core set index value among the L reference core sets may be selected, and the selected first core set is determined as the first target core set. 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 TCI state (the TCI state with the TCI state index value relatively earlier) in the first target CORESET is determined as the TCI state corresponding to the PDSCH, or the second TCI state (the TCI state with the TCI state index value relatively later) in the first target CORESET is determined as the TCI state corresponding to the PDSCH.

In the following, for the case that the terminal device does not receive the target enabling parameter (the RRC signaling does not carry the target enabling parameter), a process of determining the PDSCH and the TCI state corresponding to the PDCCH before receiving the activation information of the MAC-CE and determining the TCI state corresponding to the PDSCH after receiving the activation information of the MAC-CE is described by specific examples.

The terminal device receives 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 and PDSCH configurations.

Before the terminal equipment receives the activation information of the MAC-CE, determining the TCI states corresponding to the first two TCI state index values in the N (with the value of 2-128) TCI state index values in the PDSCH configuration as two TCI states corresponding to the PDSCH. For the PDCCH, for each core set configuration including one TCI state index value, determining the TCI state of the SSB/CSI-RS at the time of random access as the TCI state corresponding to the core set corresponding to the current core set configuration, for each core set configuration including at least two TCI state index values, determining the TCI state corresponding to the first two TCI state index values in the current core set configuration as the TCI state corresponding to the core set corresponding to the current core set configuration, where the TCI state corresponding to the PDCCH includes the TCI state corresponding to each core set.

After the terminal equipment receives the activation information of the MAC-CE, when the time interval between the reception of the DCI and the reception of the scheduled PDSCH is smaller than a preset threshold, 3 CORESETs corresponding to the target BWP are determined in the M CORESETs. Referring to fig. 2a, when all of the 3 CORESET (CORESET #0, CORESET #1, and CORESET # 2) includes two TCI states, selecting the CORESET (CORESET # 0) with the lowest CORESET index value, and determining the first TCI state (TCI state # 0) or the second TCI state (TCI state # 1) in the selected CORESET as a TCI state corresponding to the PDSCH. Alternatively, as shown in fig. 2b, among the 3 CORESET (CORESET #0, CORESET #1, and CORESET # 2), only the CORESET (CORESET # 0) with the lowest CORESET index value includes two TCI states, and the remaining CORESET (CORESET #1 and CORESET # 2) includes one TCI state, then the CORESET #0 including the two TCI states is determined as the first target CORESET, and the first TCI state (TCI state # 0) or the second TCI state (TCI state # 1) in the CORESET #0 is determined as a TCI state corresponding to the PDSCH. Of course, the corresponding TCI status in 3 CORESET may be other status, and is not illustrated. When the first core set is the reference core set, there may be other implementation cases for determining the TCI state corresponding to the PDCCH and the PDSCH, which are not listed here.

In the foregoing implementation process of the present application, by selecting the first CORESET with the lowest index value from the L first CORESETs as the first target CORESET, the first target CORESET may be determined based on the principle of the lowest index value, and by determining any one TCI state in the first target CORESET as the TCI state corresponding to the PDSCH, the selectability of the TCI state may be ensured.

When two second CORESET are two reference CORESETs, selecting a first target CORESET from the L reference CORESETs according to a CORESET index value corresponding to each reference CORESET, and selecting a TCI state from 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, the second CORESET corresponding to the lowest CORESET index value among the two reference CORESETs may be selected according to the CORESET index values for the two reference CORESETs, and 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.

In the following, for the case that the terminal device does not receive the target enabling parameter (the RRC signaling does not carry the target enabling parameter), a process of determining the PDSCH and the TCI state corresponding to the PDCCH before receiving the activation information of the MAC-CE and determining the TCI state corresponding to the PDSCH after receiving the activation information of the MAC-CE is described by using a specific example.

The terminal device receives an RRC signaling sent by the network device, where the RRC signaling carries M CORESET configurations, an SFN transmission mode corresponding to the PDSCH, a non-SFN transmission mode corresponding to the PDCCH, and a PDSCH configuration (the PDSCH configuration 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 equipment receives the activation information of the MAC-CE, determining the TCI states corresponding to the first two TCI state index values in the N TCI state index values in the PDSCH configuration as two TCI states corresponding to the PDSCH. For the PDCCH, the TCI state of the SSB/CSI-RS during random access is determined as one TCI state corresponding to the PDCCH.

After the terminal equipment receives the activation information of the MAC-CE, when the time interval between the reception of the DCI and the reception of the scheduled PDSCH is smaller than a preset threshold, 3 CORESETs corresponding to the target BWP are determined in the M CORESETs. Referring to fig. 3, when 1 TCI state is included in each of the 3 CORESET (CORESET #0, CORESET #1, and CORESET # 2), since the SS set in CORESET #0 and the SS set in CORESET #1 are in an associated state, the terminal device may consider that the two CORESET are transmitted by different TRP frequency division multiplexing, so that the terminal device may select the CORESET (CORESET # 0) with the lowest CORESET index value in the two CORESET associated with each other, and then determine the TCI state in the selected CORESET as the TCI state corresponding to the PDCCH. Of course, SS set association within 3 CORESET can be other cases, and is not illustrated one by one here. When the second core set is the reference core set, there may be other implementation cases for determining the TCI state corresponding to the PDCCH and the PDSCH, which are not listed here.

In the foregoing implementation process of the present application, by selecting the second CORESET with the lowest index value from the two second CORESETs as the first target CORESET, it may be achieved that the first target CORESET is determined from the two second CORESETs associated with the SS Set at the same time based on the principle of the lowest index value, and by determining the TCI state in the first target CORESET as the TCI state corresponding to the PDSCH, the rapidity of determining the TCI state may be ensured.

When the third core set and the fourth core set are two reference core sets, selecting a first target core set from the L reference core sets according to the core set index value corresponding to each reference core set, and selecting a TCI state from the first target core set to determine the TCI state corresponding to the PDSCH includes:

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, according to the CORESET index values, the CORESET corresponding to the lowest CORESET index value among the two reference CORESETs may be selected for the two reference CORESETs, and 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 an RRC signaling sent by the network device, where the RRC signaling carries M CORESET configurations, an SFN transmission mode corresponding to the PDSCH, a non-SFN transmission mode corresponding to the PDCCH, and a PDSCH configuration (the PDSCH configuration includes N TCI state index values, and N is 1).

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

After the terminal equipment receives the activation information of the MAC-CE, when the time interval between the reception of the DCI and the reception of the scheduled PDSCH is smaller than a preset threshold, 3 CORESETs corresponding to the target BWP are determined in the M CORESETs. Referring to fig. 4, each of the 3 CORESET (CORESET #0, CORESET #1, and CORESET # 2) includes 1 TCI state, where CORESET #3, CORESET #4, and CORESET #5 are 3 CORESETs corresponding to the target BWP at another time. If it is known through RRC signaling that the SS set in core set #0 at time 0 and the SS set in core set #3 at time 1 are in an associated state, the terminal device may consider that the two core sets are different TRPs and time division multiplexed and transmitted, so that the terminal device may select a core set (core set # 0) with the lowest core set index value of the two core sets associated with each other, and then determine the TCI state in the selected core set as the TCI state corresponding to the PDCCH. Of course, the association of SS sets in different CORESET at different times may also be the case (e.g., the association of SS sets in CORESET #0 with SS sets in CORESET #4, and the association of SS sets in CORESET #1 with SS sets in CORESET # 4), and they are not described in detail herein. When the third core set is the reference core set, there may be other implementation cases for determining the TCI state corresponding to the PDCCH and the PDSCH, which are not listed here.

In the implementation process of the application, the CORESET with the lowest index value is selected from the two reference CORESETs to serve as the first target CORESET, so that the first target CORESET can be determined from the two CORESETs associated with the SS Set at different moments based on the principle of the lowest index value, and the TCI state in the first target CORESET is determined to serve as the TCI state corresponding to the PDSCH, so that the rapidness of determining the TCI state can be ensured.

To further illustrate the reference to CORESET according to priority determination, the following describes the process of determining the TCI status by two specific examples for the case where the terminal device does not receive the target enabling parameter (the target enabling parameter is not carried in RRC signaling).

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

After the terminal equipment receives the activation information of the MAC-CE, when the time interval between the reception of the DCI and the reception of the scheduled PDSCH is smaller than a preset threshold, determining the CORESET corresponding to the target BWP in the M CORESETs. Referring to fig. 5, the monitored CORESET #0 in the target BWP includes one TCI state, and CORESET #1 and CORESET #2 include two TCI states, respectively. The CORESET #3, CORESET #4 and CORESET #5 are 3 CORESETs corresponding to the target BWP at another time, and the CORESET #3, CORESET #4 and CORESET #5 respectively comprise one TCI state. The RRC configuration (CORESET configuration in RRC signaling) indicates that the SS set in CORESET #0 at time 0 is associated with the SS set in CORESET #3 at time 1. When detecting the reference CORESET, the terminal device first detects whether there is CORESET including two TCI states, and since CORESET #1 and CORESET #2 include two TCI states, respectively, 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 a first target CORESET, and any one TCI state in the CORESET #1 is determined as a 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 that of the CORESET forming the SS set association, and thus CORESET #1 and CORESET #2 are determined as the reference CORESET.

In another specific implementation process, the terminal device receives an RRC signaling sent by the network device, where the RRC signaling carries M CORESET configurations, an SFN transmission mode corresponding to the PDSCH, a non-SFN transmission mode corresponding to the PDCCH, and a PDSCH configuration (the PDSCH configuration 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 equipment receives the activation information of the MAC-CE, determining the TCI states corresponding to the first two TCI state index values in the N (with the value of 2-128) TCI state index values in the PDSCH configuration as two TCI states corresponding to the PDSCH. For the PDCCH, the TCI state of the SSB/CSI-RS during random access is determined as one TCI state corresponding to the PDCCH.

After the terminal equipment receives the activation information of the MAC-CE, when the time interval between the reception of the DCI and the reception of the PDSCH scheduled by the DCI is smaller than a preset threshold, determining CORESET corresponding to the target BWP in M CORESET. Referring to fig. 6, CORESET #0, CORESET #1, and CORESET #2 monitored within the target BWP each include a TCI state. The CORESET #3, CORESET #4 and CORESET #5 are 3 CORESETs corresponding to the target BWP at another time, and the CORESET #3, CORESET #4 and CORESET #5 respectively comprise a TCI state. As can be seen from the RRC configuration, the SS set in CORESET #0 at time 0 and the SS set in CORESET #3 at time 1 are in the associated state, and the SS set in CORESET #1 at time 0 and the SS set in CORESET #2 at time 0 are in the associated state, so the terminal device can regard CORESET #0 and CORESET #3 as different TRP time division multiplexing transmission, CORESET #1 and CORESET #2 as different TRP frequency division multiplexing transmission, and the terminal device preferentially selects two CORESETs (CORESET #1 and CORESET # 2) associated with each other at the same time as a reference CORESET, then determines the CORESET (CORESET # 1) with the lowest CORESET index value in the reference CORESET as a first target CORESET, and determines the TCI state in CORESET #1 as the TCI state corresponding to PDSCH. Although there are SS set associations at the same time and SS set associations at different times in this embodiment, CORESET #1 and CORESET #2 are determined as reference CORESET because the priority of the SS set association at the same time is higher than that of the SS set association at the different times.

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

When determining the TCI state corresponding to the PDSCH from among the TCI states corresponding to the L reference CORESET according to the second CORESET selection rule and the second TCI state selection rule, for the case that the reference CORESET is the first CORESET, since each CORESET configuration may further include a CORESET index value, at this time, one second target CORESET may be selected from the L reference CORESETs according to the CORESET index values respectively corresponding to the reference CORESETs, and since the first CORESET is a CORESET including two TCI states, after the second target CORESET is selected, two TCI states in the second target CORESET may be determined as the TCI states corresponding to the PDSCH.

When determining the TCI state corresponding to the PDSCH from among the TCI states corresponding to the L reference CORESET according to the second CORESET selection rule and the second TCI state selection rule, for the case where the reference CORESET is the second CORESET or the case where the reference CORESET is the third CORESET and the fourth CORESET, two reference CORESETs may be determined as two second target CORESETs according to an SS set association rule, specifically, two second CORESETs are determined as two second target CORESETs according to an SS set association at the same time, and the third CORESET and the fourth CORESET are determined as two second target CORESETs according to an SS set association at different times.

Because the second core set includes one TCI state, and the two second core sets correspond to different TCI states, for the case where the two second core sets are determined as two second target core sets, the TCI states in the two second core sets may be combined, and the two combined 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 that the third CORESET and the fourth CORESET are determined to be two second target CORESETs, the TCI states in the third CORESET and the fourth CORESET may be combined, and the two combined TCI states may be determined to be the TCI state corresponding to the PDSCH.

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

In the implementation process of the present application, when the reference CORESET is the first CORESET, the second target CORESET may be determined according to the CORESET index value, and the TCI state corresponding to the PDSCH may be determined according to the TCI state in the second target CORESET; and when the reference CORESET is the second CORESET, combining the TCI states in the two second CORESETs according to the SS set association at the same moment so as to determine the TCI state corresponding to the PDSCH based on the TCI state combination, and when the reference CORESET is the third CORESET and the fourth CORESET, combining the TCI states in the third CORESET and the fourth CORESET according to the SS set association at different moments so as to determine the TCI state corresponding to the PDSCH based on the TCI state combination.

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

When one second target CORESET is selected from the L reference CORESETs based on the CORESET index value, the reference CORESET with the lowest CORESET index value may be selected from the L reference CORESETs, and the selected reference CORESET may be determined as the second target CORESET. Namely, the determination of the second target CORESET based on the index value minimum principle is realized.

In the following, for the case that the RRC signaling carries the target enabling parameter, that is, the terminal device receives the target enabling parameter, a process of determining the TCI states corresponding to the PDSCH and the PDCCH before receiving the activation information of the MAC-CE and determining the TCI states corresponding to the PDSCH after receiving the activation information of the MAC-CE is described by using several specific examples.

Example one

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

Since the RRC signaling carries the target enabling parameter, two TCI states corresponding to the PDSCH need to be determined. After the terminal equipment receives the activation information of the MAC-CE, when the time interval between the reception of the DCI and the reception of the scheduled PDSCH is smaller than a preset threshold, 3 CORESETs corresponding to the target BWP are determined in the M CORESETs. Referring to fig. 2a, when two TCI states are included in each of the 3 CORESET (CORESET #0, CORESET #1, and CORESET # 2), the CORESET (CORESET # 0) having the lowest CORESET index value is selected, and the two TCI states (TCI state #0, TCI state # 1) in the selected CORESET are determined as two TCI states corresponding to the PDSCH. Alternatively, as shown in fig. 2b, among the 3 CORESET (CORESET #0, CORESET #1, and CORESET # 2), only the CORESET (CORESET # 0) with the lowest CORESET index value includes two TCI states, and the remaining CORESETs (CORESET #1, and CORESET # 2) each include one TCI state, then CORESET #0 including two TCI states is determined as the first target CORESET, and two TCI states (TCI state #0, TCI state # 1) in CORESET #0 are determined as two TCI states corresponding to the PDSCH. At this time, the TCI state corresponding to the PDSCH may be determined according to the CORESET including two TCI states according to the lowest index value principle. Of course, the corresponding TCI status in 3 CORESET may be other status, and is not illustrated. In this embodiment, the procedure after receiving the activation information of the MAC-CE is a case of determining the TCI state corresponding to the PDSCH based on the first core set.

Example two

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

Since the RRC signaling carries the target enabling parameter, two TCI states corresponding to the PDSCH need to be determined. After the terminal equipment receives the activation information of the MAC-CE, when the time interval between the reception of the DCI and the reception of the scheduled PDSCH is smaller than a preset threshold, 3 CORESETs corresponding to the target BWP are determined in the M CORESETs. Referring to fig. 3, when 1 TCI state is included in each of the 3 CORESET (CORESET #0, CORESET #1, and CORESET # 2), since the SS set in CORESET #0 and the SS set in CORESET #1 are in an associated state, the terminal device may consider that the two CORESET are transmitted by different TRP frequency division multiplexing, and optionally, two CORESET associated with each other in the terminal device are combined together to determine the TCI state corresponding to the PDSCH. At this time, the TCI state corresponding to the PDSCH may be determined according to the TCI corresponding to the two CORESET associated with the SS set at the same time. Of course, the SS set association in 3 CORESET can be other cases, and is not illustrated one by one here. In this embodiment, the procedure after receiving the activation information of the MAC-CE is a case of determining the TCI state corresponding to the PDSCH based on the second core set.

Example three

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

Since the RRC signaling carries the target enabling parameter, two TCI states corresponding to the PDSCH need to be determined. After the terminal equipment receives the activation information of the MAC-CE, when the time interval between the reception of the DCI and the reception of the scheduled PDSCH is smaller than a preset threshold, 3 CORESETs corresponding to the target BWP are determined in the M CORESETs. Referring to fig. 4, each of the 3 CORESET (CORESET #0, CORESET #1, and CORESET # 2) includes 1 TCI state, and CORESET #3, CORESET #4, and CORESET #5 are 3 CORESETs corresponding to the target BWP at another time. If it is known through RRC signaling that the SS set in core set #0 at time 0 and the SS set in core set #3 at time 1 are in the associated state, the terminal device may consider that the two core sets are transmitted in time division multiplexing with different TRPs, and may determine the TCI state corresponding to the PDCCH by combining the TCI state corresponding to core set #0 and the TCI state corresponding to core set # 3. Of course, the association of SS sets in different CORESET at different times may also be other cases, and is not described in any further detail herein. In this embodiment, the process after receiving the activation information of the MAC-CE is a case where the TCI state corresponding to the PDSCH is determined based on the third core set and the fourth core set.

Example four

The terminal device receives an RRC signaling sent by the network device, where the RRC signaling carries M CORESET configurations, an SFN transmission mode corresponding to the PDSCH, an SFN transmission mode corresponding to the PDCCH, a PDSCH configuration (where 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 enabling parameter.

Since the RRC signaling carries the target enabling parameter, two TCI states corresponding to the PDSCH need to be determined. After the terminal equipment receives the activation information of the MAC-CE, when the time interval between the reception of the DCI and the reception of the scheduled PDSCH is smaller than a preset threshold, determining the CORESET corresponding to the target BWP in the M CORESETs. Referring to FIG. 5, CORESET #0 monitored in the target BWP includes one TCI state, and CORESET #1 and CORESET #2 include two TCI states, respectively. The CORESET #3, the CORESET #4 and the CORESET #5 are 3 CORESETs corresponding to the target BWP at another time, the CORESET #3, the CORESET #4 and the CORESET #5 respectively include a TCI state, and the SS set in the CORESET #0 at the time 0 and the SS set in the CORESET #3 at the time 1 are known to be associated states through RRC configuration. When detecting the reference CORESET, the terminal device first detects whether there is CORESET including two TCI states, and since CORESET #1 and CORESET #2 include two TCI states, respectively, 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 a first target CORESET, and two TCI states in the CORESET #1 are determined as 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 that of the CORESET forming the SS set association, and thus CORESET #1 and CORESET #2 are determined as the reference CORESET.

EXAMPLE five

The terminal device receives an RRC signaling sent by the network device, where the RRC signaling carries M CORESET configurations, an SFN transmission mode corresponding to the PDSCH, a non-SFN transmission mode corresponding to the PDCCH, a 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 enabling parameter.

Since the RRC signaling carries the target enabling parameter, two TCI states corresponding to the PDSCH need to be determined. After the terminal equipment receives the activation information of the MAC-CE, when the time interval between the reception of the DCI and the reception of the scheduled PDSCH is smaller than a preset threshold, determining the CORESET corresponding to the target BWP in the M CORESETs. Referring to fig. 6, CORESET #0, CORESET #1, and CORESET #2 monitored within the target BWP each include a TCI state. The CORESET #3, CORESET #4 and CORESET #5 are 3 CORESETs corresponding to the target BWP at another time, and the CORESET #3, CORESET #4 and CORESET #5 respectively comprise a TCI state. The terminal device may consider that the SS set in core set #0 at time 0 and the SS set in core set #3 at time 1 are in a related state, the SS set in core set #1 at time 0 and the SS set in core set #2 at time 0 are in a related state, and the terminal device may consider that core set #0 and core set #3 are different TRP time division multiplex transmission, core set #1 and core set #2 are different TRP frequency division multiplex transmission, and the terminal device preferentially selects two core sets (core set #1 and core set # 2) related to each other at the same time as a reference core set, and then combines the TCI states in the reference core set to determine the TCI state corresponding to the PDSCH. Although there are SS set associations at the same time and SS set associations at different times in this embodiment, CORESET #1 and CORESET #2 are determined as reference CORESET because the priority of the SS set association at the same time is higher than that of the SS set association at the different times.

The above embodiments are only used to illustrate several cases of determining the TCI states corresponding to the PDCCH and the PDSCH when the terminal device receives the target enabling parameter, and other implementation cases are not listed here.

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

receiving a default beam transmitted by the network equipment in the time interval through a determined TCI state corresponding to the PDSCH; or

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 transmitted by the network device in a time interval through a TCI state corresponding to the PDSCH. Or two default beams transmitted by the network device are received through two TCI states corresponding to the PDSCH in a time interval.

In the foregoing implementation process of the present application, after receiving the activation information of the MAC-CE, in a time interval, one default receiving beam sent by the network device may be received through one TCI state corresponding to the PDSCH, or two default receiving beams sent by the network device may be received through two TCI states corresponding to the PDSCH.

The foregoing is an implementation process of the method for determining the TCI status of the transmission configuration indication in the embodiment of the present application, when the PDSCH is SFN transmission, before receiving activation information of the MAC-CE, the TCI status of the PDSCH may be determined according to PDSCH configuration, and the TCI status of the PDCCH may be determined according to different transmission modes of the PDCCH, and after receiving the activation information of the MAC-CE, the TCI status of the PDSCH may be determined dynamically according to whether the terminal device receives the target enabling parameter, so as to ensure correct reception of PDSCH and PDCCH data.

In the above, a method for determining a TCI status of a transmission configuration indicator according to an embodiment of the present application is described, and a device for determining a TCI status of a transmission configuration indicator according to an embodiment of the present application is described below with reference to the accompanying drawings.

Referring to fig. 7, an embodiment of the present application further provides an apparatus for determining a TCI status of a transmission configuration indicator, where the apparatus is applied to a terminal device, and the apparatus includes:

a first receiving module 701, configured to receive a radio resource control RRC signaling sent by a network device, where the RRC signaling carries M control resource sets, a single frequency network SFN transmission mode corresponding to a downlink shared channel PDSCH, and a target transmission mode corresponding to a downlink control channel PDCCH, where the CORESET configuration includes a time-frequency resource location and N TCI state index values, 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;

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

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

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

a first determining submodule, configured to determine, when the PDSCH is in an SFN transmission mode and N is greater than or equal to 2, two TCI states corresponding to first two TCI state index values of the N TCI state index values as two TCI states corresponding to the PDSCH;

and a second determining submodule, configured to determine, when the PDSCH is in an SFN transmission mode and a value of N is 1, a TCI state of a synchronization signal block SSB/channel state information CSI-reference signal RS during random access as a TCI state corresponding to the PDSCH.

Optionally, the apparatus further comprises:

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

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

Optionally, the first determining module includes:

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

a fourth determining submodule, configured to, for each core set configuration including one TCI state index value, determine a TCI state of the SSB/CSI-RS at the time of random access as a TCI state corresponding to the core set configuration corresponding to the current core set configuration when the target transmission mode corresponding to the PDCCH is the SFN transmission mode, and for each core set configuration including at least two TCI state index values, determine a TCI state corresponding to each of the first two TCI state index values in the current core set configuration as a TCI state corresponding to the core set configuration corresponding to the current core set configuration, where the TCI state corresponding to the PDCCH includes a TCI state corresponding to each core set.

Optionally, the apparatus further comprises:

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

a fifth receiving module, configured to receive, for each CORESET, one or two default beams sent by the network device through a corresponding TCI state when the PDCCH is in the SFN transmission mode after the first determining module determines the TCI state corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH.

Optionally, the second determining module includes:

a fifth determining submodule, configured to determine, among the M CORESET, K CORESETs corresponding to a target bandwidth portion BWP, 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 determining submodule is used for determining L reference CORESETs according to a preset strategy after K CORESETs are determined, wherein L is an integer which is greater than or equal to 1 and less than or equal to K;

a seventh determining submodule, configured to determine, when the RRC signaling does not carry the target enabling parameter, a TCI state corresponding to the PDSCH from among the TCI states corresponding to the L reference CORESET according to a first CORESET selection rule and a first TCI state selection rule;

an eighth determining submodule, configured to determine, when the target enabling parameter is carried in the RRC signaling, a TCI state corresponding to the PDSCH from among the TCI states corresponding to the L reference CORESET according to a second CORESET selection rule and a second TCI state selection rule.

Optionally, the CORESET configuration further includes a CORESET index value and associations between the current CORESET intra-search space SS Set and other CORESET intra-search spaces SS Set;

the sixth determination submodule includes:

the device comprises a first detection unit, a second detection unit and a third detection unit, wherein the first detection unit is used for detecting whether a first CORESET exists in K CORESETs, and the first CORESET comprises two TCI states;

a first determining unit, configured to determine, in the presence of the first CORESET, that the first CORESET is the reference CORESET, where 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, in the absence of the first CORESET, whether two second CORESETs associated with the same time SS set exist in the K CORESETs;

a second determining unit, configured to determine two second CORESETs as two reference CORESETs in a case where there are two second CORESETs, where the second CORESETs include one TCI state;

a third detecting unit, configured to detect whether a third CORESET exists among K CORESETs when there are no two second CORESETs, where a SS Set in the third CORESET forms an association with a SS Set in a fourth CORESET of P CORESETs corresponding to the target BWP at another time, 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, in the presence of the third CORESET, that the third CORESET and the fourth CORESET are two reference CORESETs, where the third CORESET and the fourth CORESET both include one TCI state.

Optionally, the seventh determining sub-module is further configured to:

Optionally, in a case that the first CORESET is the reference CORESET, the seventh determining sub-module is further configured to:

Optionally, in a case that two of the second CORESET are two of the reference CORESETs, the seventh determining sub-module is further configured to:

Optionally, in a case that the third CORESET and the fourth CORESET are two reference CORESETs, the seventh determining sub-module is further configured to:

Optionally, the eighth determining submodule includes:

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

and a second processing unit, configured to determine, according to an SS set association principle, the two reference CORESETs as two second target CORESETs when the reference CORESET is the second CORESET or the reference CORESET is the third CORESET and the fourth CORESET, combine TCI states in the two second target CORESETs, and determine the two combined TCI states 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 status corresponding to the PDSCH, the apparatus further includes:

a sixth receiving module, configured to receive a default beam sent by the network device in the time interval according to the determined TCI status corresponding to the PDSCH; or alternatively

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

It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a processor readable storage medium. Based on such understanding, the technical solutions of the present application, which are essential or contributing to the prior art, or all or part of the technical solutions may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

It should be noted that the apparatus provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

An embodiment of the present application further provides a terminal device, as shown in fig. 8, where the terminal device includes a memory 801, a transceiver 802, and a processor 803; a memory 801 for storing a computer program; a transceiver 802 for receiving and transmitting data under the control of the processor 803; a processor 803 for reading the computer program in the memory 801 and performing the following operations:

controlling the transceiver 802 to receive a radio resource control RRC signaling sent by a network device, where the RRC signaling carries M control resource sets, a single frequency network SFN transmission mode corresponding to a downlink shared channel PDSCH, and a target transmission mode corresponding to a downlink control channel PDCCH, the CORESET configuration includes a time-frequency resource position and N TCI state index values, 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 activation information of a Media Access Control (MAC) -Control Element (CE) sent by the network device, determining a TCI state corresponding to the PDSCH according to an SFN transmission mode corresponding to the PDSCH, and determining the TCI state corresponding to the PDCCH according to a target transmission mode 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 is smaller than a preset threshold, determining a TCI state corresponding to the PDSCH according to a condition whether the RRC signaling carries a target enabling parameter, a CORESET selection rule, and a TCI state selection rule;

Optionally, the RRC signaling further carries a PDSCH configuration, where 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:

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

and controlling the transceiver 802 to receive a default beam sent by the network device in a TCI state corresponding to the PDSCH if the value of N is 1.

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

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

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 in a non-SFN transmission mode;

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

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 that two of the second CORESET are two of the 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 activation information of the MAC-CE and the processor 803 determines the TCI state corresponding to the PDSCH, the processor 803 is further configured to:

controlling the transceiver 802 to receive a default beam transmitted by the network device in the time interval according to the determined TCI status corresponding to the PDSCH; or

And controlling the transceiver 802 to respectively receive two default beams transmitted by the network device in the time interval according to the determined two TCI states corresponding to the PDSCH.

Wherein in fig. 8 the bus architecture may include any number of interconnected buses and bridges, with one or more processors represented by processor 803 and various circuits represented by memory 801 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 802 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium including wireless channels, wired channels, fiber optic cables, and the like. The user interface 804 may also be an interface capable of interfacing with a desired device for different user devices, including but not limited to a keypad, display, speaker, microphone, joystick, etc.

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 Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA), or a Complex Programmable Logic Device (CPLD), and may also be a multi-core architecture.

The processor is used for executing the method provided by the embodiment of the application according to the obtained executable instructions by calling the computer program stored in the memory. The processor and memory may also be physically separated.

It should be noted that, the apparatus provided in the embodiment of the present application can implement all the method steps implemented by the method embodiment and achieve the same technical effect, and detailed descriptions of the same parts and beneficial effects as the method embodiment in this embodiment are omitted here.

Embodiments of the present application further provide a processor-readable storage medium having stored thereon a computer program for causing a processor to execute a method of determining a transport configuration indication, TCI, status.

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 memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memories (NAND FLASH), solid State Disks (SSDs)), etc.

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

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

These processor-executable instructions may also be stored in a processor-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These processor-executable instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A method for determining a Transmission Configuration Indication (TCI) state is applied to a terminal device, and is characterized by comprising the following steps:

2. The method of claim 1, wherein the RRC signaling further carries a PDSCH configuration, and the PDSCH configuration includes N TCI state index values;

determining the TCI state corresponding to the PDSCH according to the SFN transmission mode corresponding to the PDSCH comprises the following steps:

3. The method of claim 2, wherein after determining the TCI status for the PDSCH according to the SFN transmission mode for the PDSCH, the method further comprises:

4. The method for determining the TCI status according to claim 1, wherein the determining the TCI status corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH includes:

and under the condition that the target transmission mode corresponding to the PDCCH is an SFN transmission mode, aiming at each CORESET configuration comprising one TCI state index value, determining the TCI state of the SSB/CSI-RS during random access as the TCI state corresponding to the CORESET corresponding to the current CORESET configuration, aiming at each CORESET configuration comprising at least two TCI state index values, determining the TCI states respectively corresponding to the first two TCI state index values in the current CORESET configuration as the TCI states corresponding to the CORESET corresponding to the current CORESET configuration, wherein the TCI states corresponding to the PDCCH comprise the TCI states corresponding to each CORESET.

5. The method for determining the TCI status according to claim 4, wherein after determining the TCI status corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH, the method further comprises:

receiving a default beam sent by the network equipment through a TCI state corresponding to the PDCCH when the PDCCH is in a non-SFN transmission mode;

6. The method for determining the TCI status according to claim 1, wherein the determining the TCI status corresponding to the PDSCH according to whether the RRC signaling carries a target enabling parameter, a CORESET selection rule, and a TCI status selection rule includes:

7. The method of claim 6, wherein the CORESET configuration further comprises CORESET index values and associations between current CORESET intra-search space SS Set and other CORESET intra-SS sets;

8. The method for determining the TCI status according to claim 7, wherein the determining the TCI status corresponding to the PDSCH from among the TCI statuses corresponding to the L reference CORESET according to the first CORESET selection rule and the first TCI status selection rule comprises:

9. The method for determining the status of a transmission configuration indicator TCI according to claim 8, wherein in case the first CORESET is the reference CORESET;

10. The method according to claim 8, wherein in the case where two of said second CORESET are two of said reference CORESETs;

11. The method for determining the status of a TCI according to claim 8, wherein in case said third CORESET and said fourth CORESET are two of said reference CORESETs;

12. The method for determining the TCI status according to claim 7, wherein the determining the TCI status corresponding to the PDSCH from among the TCI statuses corresponding to the L reference CORESET according to a second CORESET selection rule and a second TCI status selection rule comprises:

13. The method for determining the status of a TCI according to claim 12, wherein said selecting a second target CORESET among said L reference CORESETs according to the CORESET index value corresponding to each of said reference CORESETs comprises;

14. The method for determining the Transmission Configuration Indication (TCI) status according to claim 1, further comprising, after receiving the activation information of the MAC-CE and determining the TCI status corresponding to the PDSCH:

And respectively receiving two default beams sent by the network equipment in the time interval through the determined two TCI states corresponding to the PDSCH.

15. A terminal device comprising a memory, a transceiver, a processor;

before the transceiver receives activation information of a Media Access Control (MAC) -control unit (CE) sent by the network equipment, determining a TCI state corresponding to the PDSCH according to an SFN transmission mode corresponding to the PDSCH and determining a TCI state corresponding to the PDCCH according to a target transmission mode corresponding to the PDCCH;

when the transceiver receives the activation information of the MAC-CE and the time interval between the reception of the downlink control information DCI and the reception of the PDSCH scheduled by the transceiver is smaller than a preset threshold, determining a TCI state corresponding to the PDSCH according to the condition whether the RRC signaling carries a target enabling parameter, a CORESET selection rule and a TCI state selection rule;

16. The terminal device of claim 15, wherein the RRC signaling further carries a PDSCH configuration, the PDSCH configuration including N TCI state index values; the processor is further configured to perform the following operations:

17. The terminal device of claim 16, wherein 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:

controlling the transceiver to respectively receive two default beams transmitted by the network equipment through two TCI states corresponding to the PDSCH when N is greater than or equal to 2;

18. The terminal device of claim 15, wherein the processor is further configured to:

19. The terminal device of claim 18, wherein after determining the TCI status corresponding to the PDCCH according to the target transmission mode corresponding to the PDCCH, the processor is further configured to:

controlling the transceiver to receive a default beam sent by the network equipment through a TCI state corresponding to the PDCCH under the condition that the PDCCH is in a non-SFN transmission mode;

20. The terminal device of claim 15, wherein the processor is further configured to:

21. The terminal device of claim 20, wherein the CORESET configuration further comprises a CORESET index value and associations between current CORESET intra-search space SS Set and other CORESET intra-SS sets;

the processor is further configured to perform the following:

in the presence of the third CORESET, determining the third CORESET and the fourth CORESET as two reference CORESETs, each of the third CORESET and the fourth CORESET including a TCI state.

22. The terminal device of claim 21, wherein the processor is further configured to:

23. The terminal device according to claim 22, characterized in that, in the case where the first CORESET is the reference CORESET;

the processor is further configured to perform the following operations:

24. The terminal device according to claim 22, characterized in that, in the case where two of said second CORESET are two of said reference CORESETs;

the processor is further configured to perform the following operations:

25. The terminal device according to claim 22, characterized in that in the case where said third and fourth CORESET are two of said reference CORESETs;

the processor is further configured to perform the following operations:

26. The terminal device of claim 21, wherein the processor is further configured to:

27. The terminal device of claim 26, wherein the processor is further configured to:

28. The terminal device of claim 15, wherein after the transceiver receives the activation information for the MAC-CE and the processor determines the TCI status for the PDSCH, the processor is further configured to:

controlling the transceiver to receive a default beam transmitted by the network device in the time interval according to the determined TCI state corresponding to the PDSCH; or

29. A device for determining a TCI status of a transmission configuration indicator, applied to a terminal device, comprising:

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

30. A processor-readable storage medium, characterized in that the processor-readable storage medium stores a computer program for causing the processor to execute the method of determining a transmission configuration indication, TCI, status of any of claims 1 to 14.