Patent Publication Number: US-2021168030-A1

Title: Configuration method and apparatus for transmission configuration indication

Description:
TECHNICAL FIELD 
     The present disclosure relates to the field of communication, and in particular to methods and devices of configuring transmission configuration indication. 
     BACKGROUND 
     Standardization related to 5G systems, namely New Radio (NR) systems, is under discussion of 3rd Generation Partnership Project (3GPP). 
     In the 5G systems, after a terminal finishes a random access with a base station and establishes a Radio Resource Control (RRC) connection with the base station, the base station may determine a plurality of Transmission Configuration Indication (TCI) states for the terminal according to measurement results reported by the terminal. Each TCI state indicates a spatial Rx parameter in a case of its QCL (Quasi-Co-Location) type being type D, that is, it indicates a receiving beam of the terminal. At present, the number of TCI states is up to 64. 
     Currently, for receiving a Physical Downlink Shared Channel (PDSCH), the base station needs to, after configuring up to 64 TCI states with an RRC signaling, use an activation signaling, such as Media Access Control Element (MAC CE), to activate any 8 TCI states among the up to 64 TCI states. In a case that each TCI state corresponds to 1 bit of the MAC CE, up to 64 bits of the MAC CE are required to activate 8 TCI states of the up to 64 TCI states, which results in a relatively great signaling overhead of the MAC CE. 
     SUMMARY 
     In order to overcome the problems in the related art, embodiments of the present disclosure provide methods and devices of configuring transmission configuration indication. 
     According to a first aspect of the present disclosure, there is provided a method for configuring transmission configuration indication, which is applicable to a base station and includes: 
     transmitting, after establishing a Radio Resource Control (RRC) connection with a terminal, an activation signaling to the terminal, wherein the activation signaling is to activate all TCI states of a target TCI group, and the target TCI group includes a plurality of TCI states; and 
     transmitting a configuration signaling to the terminal, wherein the configuration signaling is to instruct the terminal to receive a physical downlink channel scheduled by the configuration signaling through a target receiving beam, the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state, and the target TCI state is a TCI state of the target TCI group indicated by the configuration signaling. 
     In some embodiments of the present disclosure, before transmitting the activation signaling to the terminal, the method further includes: 
     transmitting, through a target RRC signaling, a TCI state correspondence table to the terminal, wherein the TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. 
     In some embodiments of the present disclosure, the target RRC signaling further includes grouping indication information which indicates a TCI group corresponding to each TCI state identifier in the TCI state correspondence table. 
     In some embodiments of the present disclosure, transmitting the activation signaling to the terminal includes: 
     transmitting, to the terminal, an activation signaling which indicates whether all TCI states of each TCI group are activated. 
     In some embodiments of the present disclosure, transmitting the configuration signaling to the terminal includes: 
     determining a serial number of each TCI state in the target TCI group by sorting all the TCI state of the target TCI group in an ascending order of the TCI state identifiers; 
     determining a target serial number of the target TCI state; and 
     transmitting, to the terminal, a configuration signaling carrying the target serial number. 
     According to a second aspect of the present disclosure, there is provided a method for configuring a transmission configuration indication (TCI), which is applicable to a terminal, and includes: 
     receiving, after establishing a radio resource control (RRC) connection with a base station, an activation signaling from the base station; 
     activating all TCI states of a target TCI group indicated by the activation signaling, wherein the target TCI group includes a plurality of TCI states; 
     determining a target receiving beam after receiving a configuration signaling from the base station, wherein the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state, and the target TCI state is a TCI state of the target TCI group indicated by the configuration signaling; 
     receiving, through the target receiving beam, a physical downlink channel scheduled by the configuration signaling. 
     In some embodiments of the present disclosure, before receiving the activation signaling from the base station, the method further includes: 
     receiving, through a target RRC signaling, a TCI state correspondence table from the base station, wherein the TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. 
     In some embodiments of the present disclosure, the target RRC signaling further includes grouping indication information which indicates a TCI group corresponding to each TCI state identifier in the TCI state correspondence table. 
     In some embodiments of the present disclosure, determining the target receiving beam after receiving the configuration signaling from the base station includes: 
     determining a serial number of each TCI state of the target TCI group by sorting all TCI states of the target TCI group in an ascending order of TCI state identifiers; 
     determining a TCI state whose serial number matches a target serial number carried by the configuration signaling, as a target TCI state; 
     determining a target signal identifier which corresponds to a target TCI state identifier of the target TCI state from the TCI state correspondence table; and 
     determining a receiving beam for receiving a target reference signal as the target receiving beam, the target reference signal is a reference signal indicated by the target signal identifier. 
     According to a third aspect of the present disclosure, there is provided a device for configuring transmission configuration indication, which is applicable to a base station and includes: 
     a first transmitting module, configured to transmit, after establishing a radio resource control (RRC) with a terminal, an activation signaling to the terminal, wherein the activation signaling is to activate all TCI states of a target TCI group and the target TCI group includes a plurality of TCI states; and 
     a second transmitting module, configured to transmit, a configuration signaling to the terminal, wherein the configuration signaling is to instruct the terminal to receive a physical downlink channel scheduled by the configuration signaling through a target receiving beam, the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state, and the target TCI state is a TCI state of the target TCI group indicated by the configuration signaling. 
     In some embodiments of the present disclosure, the device further includes: 
     a third transmitting module, configured to transmit, and through a target RRC signaling, a TCI state correspondence table to the terminal, wherein the TCI state correspondence includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. 
     In some embodiments of the present disclosure, the target RRC signaling further includes grouping indication information which indicates a TCI group corresponding to each TCI state identifier in the TCI state correspondence table. 
     In some embodiments of the present disclosure, the first transmitting module includes: 
     a first transmitting sub-module, configured to transmit an activation signaling to the terminal, wherein the activation signaling indicates whether all TCI states of each TCI group are activated. 
     In some embodiments of the present disclosure, the second transmitting module includes: 
     a first determining sub-module, configured to determine a serial number of each TCI state of the target TCI group by sorting all the TCI state included in the target TCI group in an ascending order of the TCI state identifiers; 
     a second determining sub-module, configured to determine a serial number of the target TCI state; and 
     a second transmitting sub-module, configured to transmit a configuration signaling carrying the target serial number to the terminal. 
     According to a fourth aspect of the present disclosure, there is provided a device for configuring transmission configuration indication, which is applicable to a terminal and includes: 
     a first receiving module, configured to receive, after establishing a radio resource control (RRC) connection with a base station, an activation signaling from the base station; 
     an activating module, configured to activate all TCI states of a target TCI group indicated by the activation signaling, wherein the target TCI group includes a plurality of TCI states corresponding to the terminal; 
     a determining module, configured to determine a target receiving beam after receiving a configuration signaling from the base station, wherein the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state, and the target TCI state is a TCI state of the target TCI group indicated by the configuration signaling; and 
     a second receiving module, configured to receive, through the target receiving beam, a physical downlink channel scheduled by the configuration signaling. 
     In some embodiments of the present disclosure, the device further includes: 
     a third receiving module, configured to receive, through a target RRC signaling, a TCI state correspondence table from the base station, wherein the TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. 
     In some embodiments of the present disclosure, the target RRC signaling further includes grouping indication information which indicates a TCI group corresponding to each TCI state identifier in the TCI state correspondence table. 
     In some embodiments of the present disclosure, the determining module includes: 
     a third determining sub-module, configured to determine a serial number of each TCI state of the target TCI group by sorting all TCI states of the target TCI group in an ascending order of the TCI state identifiers; 
     a fourth determining sub-module, configured to determine a TCI state, whose serial number matches a target serial number carried by the configuration signaling, as the target TCI state; 
     a fifth determining sub-module, configured to determine a target signal identifier corresponding to a target TCI state identifier of the target TCI state according to the TCI state correspondence table; and 
     a sixth determining sub-module, configured to determine a receiving beam for receiving a target reference signal as a target receiving beam, wherein the target reference signal is a reference signal indicated by the target signal identifier. 
     According to a fifth aspect of the present disclosure, a computer-readable storage medium is provided, the computer-readable storage medium stores a computer program, wherein the method for configuring transmission configuration indication according to the first aspect is performed in a case that the computer program is executed. 
     According to a sixth aspect of the present disclosure, a computer-readable storage medium is provided, the computer-readable storage medium stores a computer program, wherein the method for configuring transmission configuration indication according to the second aspect is performed in a case that the computer program is executed. 
     According to a seventh aspect of the present disclosure, there is provided an apparatus for configuring transmission configuration indication, which is applicable to a base station and includes: 
     a processor; 
     a memory configured to store instructions executable by the processor; 
     wherein the processor is configured to: 
     transmit, and after establishing a radio resource control (RRC) connection with a terminal, an activation signaling to the terminal, wherein the activation signaling is to activate all TCI states included in a target TCI group, and the target TCI group includes a plurality of TCI states; and 
     transmit a configuration signaling to the terminal, wherein the configuration signaling is to instruct the terminal to receive a physical downlink channel scheduled by the configuration signaling through a target receiving beam, the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state, and the target TCI state is a TCI state of the target TCI group indicated by the configuration signaling. 
     According to an eighth aspect of the present disclosure, there is provided an apparatus for configuring transmission configuration indication, which is applicable to a terminal and includes: 
     a processor; 
     a memory configured to store processor instructions executable by the processor; 
     wherein the processor is configured to: 
     receive, after establishing a radio resource control (RRC) connection with a base station, an activation signaling from the base station; 
     activate all TCI states of a target TCI group indicated by the activation signaling; wherein the target TCI group includes a plurality of TCI states; 
     determine a target receiving beam after receiving a configuration signaling from the base station, wherein the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state and the target TCI state is a TCI state of the target TCI group indicated by the configuration signaling; and 
     receiving, through the target receiving beam, a physical downlink channel scheduled by the configuration signaling. 
     The technical solutions provided by the embodiments of the present disclosure may produce following beneficial effects: 
     In embodiments of the present disclosure, the base station may transmit an activation signaling to a terminal after establishing an RRC connection with the terminal, thereby activating all TCI states of a target TCI group. And then, the base station transmits a configuration signaling to the terminal to designate a receiving beam for a reference signal corresponding to a target TCI state in the activated target TCI group as a target receiving beam, such that the terminal may receive, through the target receiving beam, a physical downlink channel scheduled by the configuration signaling. In the above process, by grouping TCI states, whether each TCI group is activated or not may be indicated by a smaller number of bits in the activation signaling. Once a target TCI group is activated, all TCI states of the target TCI group are activated, which reduces overhead of the activation signaling and saves resources of the base station. 
     In embodiments of the present disclosure, a base station may transmit a TCI state correspondence table to a terminal through a target RRC signaling before transmitting an activation signaling to the terminal, wherein the TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. In the embodiment of the present disclosure, the base station transmits the TCI state correspondence table to the terminal, so that the terminal can subsequently determine a target receiving beam for receiving the physical downlink channel scheduled by the configuration signaling according to the TCI state correspondence table, with high availability. 
     In embodiments of the present disclosure, a base station may further transmit a grouping indication information to a terminal through a target RRC signaling, so that the terminal can determine TCI states of each TCI group from the TCI state correspondence table according to the grouping indication information, and the base station may subsequently indicate whether each TCI group is activated or not with a smaller number of bits in the activation signaling, and all TCI states of a target TCI group are activated upon that the target TCI group is activated. Thus, overhead of the activation signaling is reduced. 
     In embodiments of the present disclosure, the base station may transmit an activation signaling that indicates whether all TCI states of each TCI group are activated, so that the terminal may determine, after receiving the activation signaling, that all the TCI states of the activated target TCI group are activated. Thus, overhead of the activation signaling is reduced and resources of the base station are saved. 
     In embodiments of the present disclosure, a base station may determine a serial number for each TCI state of the target TCI group by sorting all TCI states of the target TCI group in an ascending TCI state identifiers. Further, a target serial number corresponding to the target TCI state may be determined. The base station may transmit the target serial number to the terminal through a configuration signaling. The terminal may determine a corresponding target TCI state according to the target serial number and further determine a target receiving beam. Through the above process, after activating the target TCI group, the base station may enable, through the configuration signaling, the terminal to quickly determine a target TCI state in the activated target TCI group. Overhead of the activation signaling is also saved while guaranteeing services of the terminal. 
     In embodiments of the present disclosure, after establishing an RRC connection with a base station, a terminal may receive an activation signaling from the base station and activate all TCI states of a target TCI group according to the activation signaling. Further, according to the received configuration signaling, the terminal may determine a target TCI state of the target TCI group and determine a receiving beam for a reference signal corresponding to the target TCI state as a target receiving beam. The terminal may receive a physical downlink channel scheduled by the configuration signaling through the target receiving beam. In the above process, by grouping the TCI states, a base station may use a smaller number of bits in the activation signaling to indicate whether each TCI group is activated, and a terminal may activate all TCI states of a target TCI group according to the activation signaling, thereby reducing overhead of the activation signaling and saving resources of the base station. 
     In embodiments of the present disclosure, the terminal may receive, before receiving an activation signaling from the base station, a TCI state correspondence table from the base station and through a target RRC signaling. The TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. Thus, it is convenient for the terminal to subsequently determine a target receiving beam for receiving the physical downlink channel scheduled by a configuration signaling according to the TCI state correspondence table, and the availability is high. 
     In embodiments of the present disclosure, the terminal may further receive a target RRC signaling including group indication information, so that the terminal may determine TCI states of each TCI group from the TCI state correspondence table according to the grouping indication information, and the base station may subsequently indicate whether each TCI group is activated or not with a smaller number of bits in an activation signaling, and all TCI states of a target TCI group are activated in response to that the target TCI group is activated, thereby reducing overhead of activation signaling. 
     In embodiments of the present disclosure, the terminal may determine a serial number for each TCI state in the target TCI group by sorting all TCI states of an activated target TCI group according to an ascending order of TCI state identifiers. A TCI state whose serial number matches the target serial number carried by the configuration signaling is determined as a target TCI state, such that a target TCI state and a corresponding target signal identifier may be quickly determined in the target TCI group according to the previously received TCI state correspondence table. A reference signal indicated by the target signal identifier is a target reference signal, and the terminal takes a receiving beam for receiving the target reference signal as the target receiving beam. Through the above process, the terminal may quickly determine, after a target TCI group being activated, a target TCI state in the activated target TCI group, and finally determine a target receiving beam. Thus, overhead of activation signaling is reduced and resources of the base station are saved while guaranteeing services of the terminal. 
     It should be understood that the above general description and the following detailed description are only exemplary and explanatory and cannot be construed as a limit to the present disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Figures which are incorporated in and constitute a part of the specification illustrate embodiments consistent with the present disclosure, and serve together with the description to explain the principles of the present disclosure. 
         FIG. 1  is a schematic diagram illustrating a scenario of configuring transmission configuration indication according to an exemplary embodiment of the present disclosure. 
         FIG. 2  is a flow chart illustrating a method for configuring transmission configuration indication according to an exemplary embodiment of the present disclosure. 
         FIG. 3A  and  FIG. 3B  are schematic diagrams illustrating scenarios of configuring transmission configuration indication according to an exemplary embodiment of the present disclosure. 
         FIG. 4  is a flow chart illustrating a method for configuring transmission configuration indication according to another exemplary embodiment of the present disclosure. 
         FIG. 5  is a flowchart illustrating a method for configuring transmission configuration indication according to still another exemplary embodiment of the present disclosure. 
         FIG. 6  is a flow chart illustrating a method for configuring transmission configuration indication according to yet another exemplary embodiment of the present disclosure. 
         FIG. 7  is a flow chart illustrating a method for configuring transmission configuration indication according to still another exemplary embodiment of the present disclosure. 
         FIG. 8  is a flow chart illustrating a method for configuring transmission configuration indication according to yet another exemplary embodiment of the present disclosure. 
         FIG. 9  is a flow chart illustrating a method for configuring transmission configuration indication according to still another exemplary embodiment of the present disclosure. 
         FIG. 10  is a block diagram illustrating a device for configuring transmission configuration indication according to an exemplary embodiment of the present disclosure. 
         FIG. 11  is a block diagram illustrating a device for configuring transmission configuration indication according to another exemplary embodiment of the present disclosure. 
         FIG. 12  is a block diagram illustrating a device for configuring transmission configuration indication according to still another exemplary embodiment of the present disclosure. 
         FIG. 13  is a block diagram illustrating a device for configuring transmission configuration indication according to yet another exemplary embodiment of the present disclosure. 
         FIG. 14  is a block diagram illustrating a device for configuring transmission configuration indication according to still another exemplary embodiment of the present disclosure. 
         FIG. 15  is a block diagram illustrating a device for configuring transmission configuration indication according to yet another exemplary embodiment of the present disclosure. 
         FIG. 16  is a block diagram illustrating a device for configuring transmission configuration indication according to yet another exemplary embodiment of the present disclosure. 
         FIG. 17  is a schematic structural diagram illustrating an apparatus for configuring transmission configuration indication according to an exemplary embodiment of the present disclosure. 
         FIG. 18  is a schematic structural diagram illustrating an apparatus for configuring transmission configuration indication according to another exemplary embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Exemplary embodiments will be described in detail hereinafter, and examples thereof are illustrated in the accompanying drawings. In a case that the following description refers to the drawings, unless otherwise stated, the same numbers in different drawings designate the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure. Rather, they are just examples of devices and methods consistent with some aspects of the present disclosure as defined in the appended claims. 
     Terms used in the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. Singular forms “a”, “said” and “the” used in the present disclosure and appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should further be understood that the term “and/or” used herein refers to and includes any or all possible combinations of one or more associated listed items. 
     It should be understood that although the terms “first”, “second”, “third”, etc. may be used in this disclosure to describe various information, the information should not be limited by these terms. These terms are only used to distinguish information of same type from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information. Depending on the context, the word “if” as used herein may be interpreted as “at the time that” or “upon that” or “in response to determination”. 
       FIG. 1  illustrates a schematic diagram of a scenario of configuring transmission configuration indication according to at least one embodiment of the present disclosure. A base station  100  may transmit, to a terminal  200  and after establishing a radio resource control (RRC) connection with the terminal  200 , an activation signaling. The terminal  200  activates all TCI states of a target TCI group among a plurality of TCI groups according to the activation signaling. Further, the base station  100  may transmit a configuration signaling to the terminal  200 , wherein a target TCI state is indicated in a target TCI group, and the terminal may receive a physical downlink channel scheduled by the configuration signaling through a receiving beam for a reference signal corresponding to the TCI state. 
     In the above embodiment, by grouping the TCI states, it is possible to indicate whether each TCI group is activated with a smaller number of bits in the activation signaling. Once the target TCI group is activated, all TCI states of the target TCI group are activated, which reduces overhead of the activation signaling and saves resources of the base station. 
     A method for configuring transmission configuration indication according to embodiments of the present disclosure is first descripted from a base station side hereinafter. 
     Embodiments of the present disclosure provide a method for configuring transmission configuration indication, which is applicable to a base station. Referring to  FIG. 2 , a flow chart of a method for configuring transmission configuration indication according to an exemplary embodiment of the present disclosure is illustrated, and the method may include following steps: 
     In Step  101 , after establishing a radio resource control (RRC) connection with a terminal, an activation signaling is transmitted to the terminal, wherein the activation signaling is used to activate all TCI states of a target TCI group, and the target TCI group includes a plurality of TCI states; 
     In Step  102 , a configuration signaling is transmitted to the terminal. The configuration signaling is to instruct the terminal to receive, through a target receiving beam, a physical downlink channel scheduled by the configuration signaling, and the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state, and the target TCI state is a TCI state of the target TCI group indicated by the configuration signaling. 
     In the above-mentioned embodiment, after establishing the RRC connection with the terminal, the base station may transmit the activation signaling to the terminal, thereby activating all TCI states of the target TCI group. Furthermore, the base station transmits a configuration signaling to the terminal to activate the target TCI group. The receiving beam for the reference signal corresponding to the target TCI state of the TCI group is the target receiving beam, so that the terminal receives the physical downlink channel scheduled by the configuration signaling through the target receiving beam. In the above process, by grouping the TCI states, a smaller number of bits in the activation signaling may be used to indicate whether each TCI group is activated. Once the target TCI group is activated, all TCI states of the target TCI group are activated, which reduces overhead of the activation signaling and saves resources of the base station. 
     For the above Step  101 , the base station may first transmit measurement configuration information to the terminal according to related technologies, and the measurement configuration information is to instruct the terminal to report a beam measurement result to the base station. The base station determines a TCI state set according to the beam measurement result reported by the terminal. 
     The beam measurement result may include a Reference Signal (RS) identifier corresponding to a beam and Layer 1-Reference Signal Receiving Power (L1-RSRP, physical layer reference signal receiving power), etc. The RS identifier may include a RS type and an index number, wherein the RS type indicates that the reference signal may be a Synchronization Signal Block (SSB) or a channel state information reference signal (CSI-RS). 
     In this step, after establishing the RRC connection with the terminal, the base station may transmit the activation signaling to the terminal The activation signaling is to activate all TCI states of a target TCI group, and the target TCI group includes a plurality of TCI states. In some embodiments of the present disclosure, the activation signaling may be an MAC CE signaling. 
     In the embodiments of the present disclosure, in order to reduce overhead of the activation signaling, all TCI states corresponding to the terminal may be grouped. In some embodiments of the present disclosure, TCI states with close spatial information may be grouped into one group, that is to say, TCI states corresponding to a plurality of RSs with close beam directions that are used by the base station for transmitting RSs are grouped into one group, or TCI states corresponding to reference signals that are received by a terminal through beams with close directions are grouped into one group. Serial numbers of the TCI states of one group may be adjacent. 
     As illustrated in  FIG. 3A , TCI states TCI# 0 , TCI# 1 , TCI# 2 , TCI# 3  for respective RSs corresponding to transmitting beams T 0 , T 1 , T 2 , and T 3  that are used by the base station to transmit RSs and have close directions are grouped into one group, and TCI states TCI# 4 , TCI# 5 , TCI# 6 . TCI# 7  for respective RSs corresponding to transmitting beams T 4 , T 5 , T 6 , and T 7  that are used by the base station to transmit RSs and have close directions are grouped into another group. 
     Or, as illustrated in  FIG. 3B , TCI states TCI# 8 , TCI# 9 , TCI# 10  for respective RSs corresponding to receiving beams R 0 , R 1 , R 2 , and R 3  that are used by the terminal to receive RSs and have close directions are grouped into one group, and TCI states TCI # 12 , TCI # 13 , TCI# 14  and TCI# 15  for respective RSs corresponding to receiving beams R 4 , R 5 , R 6 , and R 7  that are used by the terminal to receive RSs and have close directions are grouped into another group. 
     In the embodiments of the present disclosure, optionally, each TCI group includes the same number of TCI states, for example, each TCI group includes 2, 4, or 8 TCI states. In view of that MAC CE signaling typically activates 8 TCI states, therefore, in the embodiments of the present disclosure, each TCI group may include up to 8 TCI states. 
     In addition, in the embodiments of the present disclosure, different TCI groups may not share a common TCI state, or they may share a common TCI state. The number of the TCI states shared by any two TCI groups should be less than the total number of TCI states of each TCI group. 
     For example, in a case that  4  TCI states are grouped into one group, the total number of TCI states of each TCI group is 4, then the first group may include TCI# 0 , TCI# 1 , TCI# 2 , and TCI# 3 , and the second group may include TCI# 4 , TCI# 5 , TCI# 6 , and TCI# 7 . 
     Or, the first group may include TCI# 0 , TCI# 1 , TCI# 2 , and TCI# 3 , and the second group may include TCI# 3 , TCI# 4 , TCI# 5 , and TCI# 6 . The number of the TCI states shared by the two TCI groups is 1, and the shared TCI state is TCI# 3 . 
     In a case of transmitting an activation signaling to the terminal, the base station may transmit, to the terminal, the activation signaling which indicates whether all TCI states of each TCI group are activated, so that the terminal may determine a target TCI group to be activated among all TCI groups according to the activation signaling, so as to activate all TCI states of the target TCI group. 
     If the 64 TCI states are divided into N groups, N bits are needed to indicate which target TCI group is activated. A value 1 of a current bit indicates that all TCI states of the target TCI group are activated, and a value 0 of the current bit indicates that no TCI states of the TCI group are activated. Or a value 1 indicates that no TCI states of the TCI group are activated, and a value 0 indicates that all TCI states of the target TCI group are activated, which is not limited in the present disclosure. 
     For example, each TCI group includes 4 TCI states, and any two TCI groups do not share any TCI state, then the 64 TCI states are divided into 16 groups, and the activation signaling MAC CE needs to transmit 16 bits to a terminal so that the terminal may determine a target TCI group that needs to be activated. Assuming that the first group and the third group are to be activated, the 16-bit values transmitted by the base station through the MAC CE are 0000 0000 0000 0101 in sequence, and from right to left, it is indicated that the target TCI groups that need to be activated are the first group and the third group. 
     In a case that the first target TCI group include TCI# 0 , TCI# 1 , TCI# 2 , TCI# 3 , and the third target TCI group include TCI# 8 , TCI# 9 , TCI# 10 , and TCI# 11 , the base station transmits the above 16 bits to the terminal through the MAC CE, and the terminal may determine that all TCI states of the target TCI groups need to be activated, that is, the TCI states to be activated include: TCI# 0 , TCI# 1 , TCI# 2 , TCI# 3 , TCI# 8 . TCI# 9 , TCI# 10 , and TCI# 11 . 
     Through the above process, it can be seen that in the related technology, the activation signaling MAC CE is required to transmit 64 bits to the terminal, so as to enable the terminal to determine 8 TCI states to be activated. With the method provided by the embodiment of the present disclosure, in a case that any two TCI groups does not share any TCI state, the activation signaling MAC CE only needs to transmit N bits to the terminal, and the terminal may activate all TCI states in the target TCI group, where N=64/X, X indicates the number of TCI states of each TCI group, and may be 2, 4, or 8. Therefore, the base station only needs to transmit fewer bits to enable the terminal to activate 8 TCI states of the 64 TCI states, which reduces overhead of the activation signaling. 
     For the foregoing Step  102 , in some embodiments of the present disclosure, as illustrated in  FIG. 4 , which illustrates a flowchart of another method for configuring transmission configuration indication according to the embodiment illustrated in  FIG. 2 , Step  102  may include following steps: 
     In step  102 - 1 , a serial number for each TCI state of the target TCI group is determined by sorting all TCI states of the target TCI group in an ascending order of TCI state identifiers. 
     In this step, after determining the target TCI group, the base station may determine a serial number for each TCI state of the target TCI group by sorting all the TCI states of the target TCI group in an ascending order of TCI state identifiers. 
     Assuming that the target TCI group is the first TCI group and the third TCI group, all TCI states to be activated include TCI# 0 , TCI# 1 , TCI# 2 , TCI# 3 , TCI# 8 , TCI# 9 , TCI# 10 , and TCI# 11 . A correspondence between a state identifier of each TCI state to be activated and a serial number is illustrated in Table 1. 
     
       
         
           
               
               
               
               
             
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                 Target TCI group 
                 TCI state identifier 
                 Serial number 
               
               
                   
                   
               
             
            
               
                   
                 First group 
                 TCI#0 
                 0 
               
               
                   
                   
                 TCI#1 
                 1 
               
               
                   
                   
                 TCI#2 
                 2 
               
               
                   
                   
                 TCI#3 
                 3 
               
               
                   
                 Third group 
                 TCI#8 
                 4 
               
               
                   
                   
                 TCI#9 
                 5 
               
               
                   
                   
                 TCI#10 
                 6 
               
               
                   
                   
                 TCI#11 
                 7 
               
               
                   
                   
               
            
           
         
       
     
     In Step  102 - 2 , a target serial number for the target TCI state is determined. 
     In this step, the base station may determine a target serial number for the target TCI state according to Table 1. For example, in response to determining that the target TCI state is TCI# 9 , a target serial number is determined as 5. 
     In step  102 - 3 , a configuration signaling carrying the target serial number is transmitted to the terminal. 
     In this step, the base station may transmit a configuration signaling carrying the target serial number to the terminal. In some embodiments of the present disclosure, the configuration signaling may be a Downlink Control Information (DCI) signaling. 
     In the embodiment of the present disclosure, in order to carry the target serial number in the configuration signaling, the target serial number may be converted according to the binary in the related technology so as to obtain a target binary value. Thus, the configuration signaling only needs to carry the target binary value. For example, the target serial number is  5 , and the target binary value obtained after binary conversion is  101 . 
     After receiving the configuration signaling, the terminal may determine among the 8 activated TCI states that the target TCI state is TCI# 9  according to the target serial number carried in the configuration signaling. Further, a receiving beam corresponding to TCI# 9  may be taken as a target receiving beam for receiving a physical downlink channel scheduled by the DCI signaling. The physical downlink channel may be a physical downlink control channel (PDCCH) or a physical downlink shared channel (PDSCH). 
     In the above embodiment, after activating the target TCI group, the base station may enable the terminal to quickly determine a TCI state of the activated target TCI group through the configuration signaling, that is, a target TCI state. Overhead of the activation signaling is saved while guaranteeing terminal services. 
     In some embodiments of the present disclosure, the method for configuring transmission configuration indication is illustrated in  FIG. 5 .  FIG. 5  illustrates a flowchart of another method for configuring transmission configuration indication according to the embodiment illustrated in  FIG. 2 . Before transmitting the activation signaling to the terminal, the method further includes the following steps: 
     In Step  103 , a TCI state correspondence table is transmitted to the terminal through a target RRC signaling. 
     In some embodiment of the present disclosure, the TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. The signal identifier may include a reference signal type and an index number, and the reference signal type indicates that the reference signal may be SSB or CSI-RS. The TCI state correspondence table may be as illustrated in Table 2. 
     
       
         
           
               
               
               
             
               
                   
                 TABLE 2 
               
               
                   
                   
               
               
                   
                 TCI state identifier 
                 Signal identifier 
               
               
                   
                   
               
             
            
               
                   
                 TCI#0 
                 SSB index#1 
               
               
                   
                 TCI#1 
                 SSB index#2 
               
               
                   
                 TCI#2 
                 CSI-RS index#5 
               
               
                   
                 TCI#3 
                 CSI-RS index#6 
               
               
                   
                 TCI#4 
                 SSB index#3 
               
               
                   
                 . . . 
                 . . . 
               
               
                   
                   
               
            
           
         
       
     
     The base station may first transmit Table 2 to the terminal through a target RRC signaling before transmitting the activation signaling to the terminal. After the terminal receives the Table 2, in response to determining that a target TCI is TCI# 3 , the terminal may subsequently take a receiving beam R x  for receiving CSI-RS index # 6  as a target receiving beam according to Table 2, so as to receive a physical downlink channel scheduled by the configuration signaling through R. Of course, in response to determining that the target TCI is TCI # 3 , it may further be indicated that the base station transmits CSI-RS index# 6  through a transmitting beam T x  and the transmitting beam T x  at the base station side corresponds to a receiving beam Rx at the terminal side, that is to say, the terminal is required to receive, through the receiving beam Rx, the physical downlink channel transmitted through the transmitting beam Tx. 
     In the foregoing embodiment, the base station may transmit, before transmitting the activation signaling and to the terminal, the TCI state correspondence table through the target RRC signaling. The TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. In the embodiment of the present disclosure, the base station transmits the TCI state correspondence table to the terminal, so that the terminal can subsequently determine the target receiving beam for receiving the physical downlink channel scheduled by the configuration signaling according to the TCI state correspondence table, with high availability. 
     In some embodiments of the present disclosure, the base station may further transmit, to the terminal and through a target RRC signaling, grouping indication information, which indicates a TCI group corresponding to each TCI state identifier in the TCI state correspondence table, for example, as illustrated in Table 3. 
     
       
         
           
               
               
               
               
             
               
                   
                   
               
               
                   
                 TCI state 
                   
                 Grouping indication 
               
               
                   
                 identifier 
                 Signal identifier 
                 information 
               
               
                   
                   
               
             
            
               
                   
                 TCI#0 
                 SSB index#1 
                 First group 
               
               
                   
                 TCI#1 
                 SSB index#2 
                 First group 
               
               
                   
                 TCI#2 
                 CSI-RS index#5 
                 First group 
               
               
                   
                 TCI#3 
                 CSI-RS index#6 
                 First group 
               
               
                   
                 TCI#4 
                 SSB index#3 
                 Second Group 
               
               
                   
                 . . . 
                 . . . 
                 . . . 
               
               
                   
                   
               
            
           
         
       
     
     In the embodiment of the present disclosure, after receiving the target RRC signaling including the grouping indication information, the terminal may further determine a TCI group to which each TCI state belongs, and the base station may subsequently use a smaller number of bits in the activation signaling to indicate whether each TCI group is activated, once the target TCI group is activated, all TCI states in the target TCI group are activated, thereby reducing overhead of the activation signaling. 
     In some embodiments of the present disclosure, the grouping indication information is just expected to indicate the number L of TCI states grouped into one group and the number M of TCI states share by each two adjacent TCI groups. For example, in response to determining L=4 and M=0, a predefined grouping indication information is that consecutive L TCI states form a group, that is, TCI# 0 , TCI# 1 , TCI# 2 , and TCI# 3  belong to the first group, and TCI # 4 , TCI# 5 , TCI# 6 , TCI# 7  belong to the second group, and so on. Or, the base station is not required to transmit any grouping indication information to the terminal, that is, the values of L and M are also predefined, and the above grouping indication information is written directly into a chip of the base station and a chip of the terminal. Accordingly, the base station does not need to transmit the grouping indication information to the terminal through the target RRC signaling, and the terminal may acquire the grouping indication information from its own chip, thereby saving signaling resources for interaction between the base station and the terminal. 
     The following describes a method for configuring transmission configuration indication according to embodiments of the present disclosure from the terminal side. 
     Some embodiments of the present disclosure provide a method for configuring transmission configuration indication, which is applicable to a terminal. Referring to  FIG. 6 , a flowchart of a method for configuring transmission configuration indications is illustrated according to another exemplary embodiment of the present disclosure, which may include following steps: 
     In Step  201 , after establishing a radio resource control (RRC) connection with a base station, an activation signaling is received from the base station; 
     In Step  202 , all TCI states of the target TCI group indicated by the activation signaling are activated, wherein the target TCI group includes a plurality of TCI states; 
     In Step  203 , a target receiving beam is determined after receiving a configuration signaling from the base station, wherein the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state, and the target TCI state is a TCI state of the target TCI group indicated by the configuration signaling; 
     In Step  204 , a physical downlink channel scheduled by the configuration signaling is received through the target receiving beam. 
     In the foregoing embodiment, a terminal may receive an activation signaling from a base station after establishing an RRC connection with the base station, and activate all TCI states of a target TCI group according to the activation signaling. Further, according to the received configuration signaling, a target TCI state is determined in the target TCI group, and a receiving beam for a reference signal corresponding to the target TCI state is taken as a target receiving beam. The terminal may receive a physical downlink channel scheduled by the configuration signaling through the target receiving beam. In the above process, by grouping the TCI states, the base station can use a smaller number of bits in the activation signaling to indicate whether each TCI group is activated, and the terminal may activate all TCI states of the target TCI group according to the activation signaling, thereby reducing overhead of the activation signaling and saving resources of the base station. 
     For the above Step  201 , the terminal may first receive measurement configuration information from the base station according to the related technologies, and report a beam measurement result to the base station according to the measurement configuration information, so that the base station can determine a TCI state set. The beam measurement result may include a RS identifier of a beam and L1-RSRP, etc. The RS identifier may include a RS type and an index number, and the RS type indicates that the reference signal may be SSB or CSI-RS. 
     After establishing an RRC connection with the base station, the terminal may receive an activation signaling from the base station according to related technologies. In some embodiments of the present disclosure, the activation signaling may be an MAC CE signaling. 
     For the above Step  202 , the terminal activates all TCI states of the target TCI group according to the activation signaling. 
     In some embodiments of the present disclosure, each TCI group includes a plurality of TCI states, and each TCI group includes the same number of TCI states, for example, each TCI group includes 2, 4, or 8 TCI states. In view of that an MAC CE signaling typically activates 8 TCI states, therefore, in the embodiment of the present disclosure, each TCI group may include up to 8 TCI states. 
     In addition, different TCI groups may share no common TCI state or share common TCI states. Common TCI states of any two TCI groups should be less than the total number of TCI states of each TCI group. 
     In a case of transmitting an activation signaling to the terminal, the base station may transmit, to the terminal, an activation signaling which indicates whether all TCI states of each TCI group are activated. The terminal activates all TCI states of a target TCI group according to the activation signaling. 
     For example, each TCI group includes 4 TCI states, and any two TCI groups have no common TCI state, then the 64 TCI states are divided into 16 groups, and the activation signaling MAC CE needs to transmit 16 bits to the terminal, and a value of the 16 bits sent from the base station to the terminal is 0000 0000 0000 0101 in sequence, indicating the target TCI groups that need to be activated are the first group and the third group from right to left. The terminal determines that the target TCI group is the first group and the third group according to the activation signaling, and the terminal needs to activate all the TCI states of the first group and the third group. 
     For the above Step  203 ,  FIG. 7  illustrates a process that the terminal determines a target receiving beam after receiving the configuration signaling from the base station.  FIG. 7  illustrates a flow chart of another method for configuring transmission configuration indication according to the embodiment as illustrated in  FIG. 6 . The Step  203  may include following steps: 
     In Step  203 - 1 , a serial number corresponding to each TCI state of the target TCI group is determined by sorting all TCI states of the target TCI group in an ascending order of TCI state identifiers; 
     In this step, after activating all the TCI states of the target TCI group, the terminal may determine a serial number corresponding to each TCI state of the target TCI group by sorting the TCI states in an ascending order of TCI state identifiers, as illustrated in Table 1. 
     In step  203 - 2 , a TCI state whose serial number matches a target serial number carried by the configuration signaling is determined as a target TCI state. 
     In this step, in order to compare the serial numbers corresponding to all TCI states of the target TCI group with the target serial number, the terminal may perform a binary conversion on a serial number corresponding to each TCI state in Table 1, so as to obtain a binary value of each TCI state of the target TCI group, as illustrated in Table 4. 
     
       
         
           
               
               
               
               
               
             
               
                   
                 TABLE 4 
               
               
                   
                   
               
               
                   
                   
                 TCI state 
                 Serial 
                   
               
               
                   
                 Target TCI group 
                 indicator 
                 number 
                 Binary value 
               
               
                   
                   
               
             
            
               
                   
                 First group 
                 TCI#0 
                 0 
                 000 
               
               
                   
                   
                 TCI#1 
                 1 
                 001 
               
               
                   
                   
                 TCI#2 
                 2 
                 010 
               
               
                   
                   
                 TCI#3 
                 3 
                 011 
               
               
                   
                 The third group 
                 TCI#8 
                 4 
                 100 
               
               
                   
                   
                 TCI#9 
                 5 
                 101 
               
               
                   
                   
                 TCI#10 
                 6 
                 110 
               
               
                   
                   
                 TCI#11 
                 7 
                 111 
               
               
                   
                   
               
            
           
         
       
     
     In the embodiment of the present disclosure, the base station will make the configuration signaling, such as a DCI signaling, carry a target binary value of the target TCI state in a binary manner. In response to determining that the target binary value is  101 , the terminal can determine TCI# 9  as the target TCI state according to Table 4. 
     In Step  203 - 3 , according to the TCI state correspondence table, a target signal identifier for the target TCI state identifier of the target TCI state is determined. 
     In this step, after determining the target TCI state, the terminal may determine the target signal identifier for the target TCI state identifier according to Table 3. It is assumed that the target signal identifier is SSB# 4 . 
     In Step  203 - 4 , a receiving beam for receiving a target reference signal is taken as a target receiving beam, and the target reference signal is a reference signal indicated by the target signal identifier. 
     In this step, the terminal may take the receiving beam for receiving the target reference signal as the target receiving beam, that is, the receiving beam R x  for receiving SSB# 4  is taken as the target receiving beam. 
     In the above embodiment, after activating the target TCI group, the terminal can quickly determine the target TCI state in the activated target TCI group, and finally determine the target receiving beam, thereby reducing overhead of the activation signaling and saving resources of the base station while guaranteeing services of the terminal. 
     For the above Step  204 , after determining the target receiving beam, the terminal may receive a physical downlink channel scheduled by the configuration signaling through the target receiving beam according to related technologies. In some embodiments of the present disclosure, the physical downlink channel may be PDCCH or PDSCH. 
     In some embodiments of the present disclosure, as illustrated in  FIG. 8 , which is a flowchart of another method for configuring transmission configuration indication according to the embodiment as illustrated in  FIG. 6 , before receiving the activation signaling from the base station, the method for configuring transmission configuration indication includes following steps: 
     In Step  205 , a TCI state correspondence table is received from the base station through a target RRC signaling; 
     wherein the TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. 
     In this step, the base station may transmit the Table 2 to the terminal through a target RRC signaling before transmitting an activation signaling to the terminal, and the terminal receives the Table 2 according to related technologies, so that the terminal can subsequently determine a target receiving beam for receiving a physical downlink channel scheduled by the configuration signaling according to the TCI state correspondence table, with high availability. 
     In the embodiment, the terminal may further receive, from the base station and through the target RRC signaling, grouping indication information which indicates a TCI group corresponding to each TCI state identifier in the TCI state correspondence table. 
     In other words, the base station transmits the Table 3 to the terminal through the target RRC signaling, and the terminal determines the TCI states of each TCI group in the TCI state correspondence table according to the grouping indication information, and subsequently, the base station may use a relatively small number of bits in the activation signaling to indicate whether each TCI group is activated. Once the target TCI group is activated, all TCI states of the target TCI group are activated, thereby reducing overhead of the activation signaling. 
     In some embodiments of the present disclosure, optionally, the grouping indication information only needs to provide the number L of TCI states grouped into a group and the number M of common TCI states of every two adjacent TCI groups. For example, in a case of L=4 and M=0, a predefined grouping indication information indicates that consecutive L TCI states are grouped into one group, that is, TCI# 0 , TCI# 1 , TCI# 2 , and TCI# 3  belong to a first group, and TCI # 4 , TCI# 5 , TCI# 6 , TCI# 7  belong to a second group, and so on. Or, the base station does not need to transmit any grouping indication information to the terminal, that is, the values of L and M are also predefined, and the above grouping indication information is written directly into a chip of the base station and a chip of the terminal. Accordingly, the base station does not need to transmit grouping indication information to the terminal any more, and the terminal may directly acquire grouping indication information from its own chip, thereby saving signaling resources for interaction between the base station and the terminal. 
     The embodiment of the present disclosure provides another method for configuring transmission configuration indication. Referring to  FIG. 9 , which illustrates a flowchart of another method for configuring transmission configuration indication according to an exemplary embodiment of the present disclosure, the method includes following steps: 
     In step  301 , the base station transmits a TCI state correspondence table to the terminal through a target RRC signaling, and the target RRC signaling further includes grouping indication information. 
     wherein, the TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state.; and the grouping indication information indicates a TCI group corresponding to each TCI state identifier in the TCI state correspondence table. 
     In Step  302 , the base station transmits, to the terminal, an activation signaling which indicates whether all TCI states of each TCI group are activated. 
     In some embodiments of the present disclosure, the activation signaling may be an MAC CE signaling. In such a case, the base station needs N bits to indicate which target TCI group is activated, and N is much smaller than 64. 
     In Step  303 , the terminal activates all TCI states of the target TCI group indicated by the activation signaling. 
     wherein the target TCI group includes a plurality of TCI states. 
     In Step  304 , the base station determine a serial number corresponding to each TCI state of the target TCI group by sorting all TCI states of the target TCI group in an ascending order of TCI state identifiers. 
     In Step  305 , the base station determines a target serial number corresponding to the target TCI state; 
     wherein the target TCI state is a TCI state of the target TCI group that needs to be indicated by a configuration signaling subsequently. 
     In Step  306 , the base station transmits, to the terminal, a configuration signaling carrying the target serial number. 
     The configuration signaling is to instruct the terminal to receive, through a target receiving beam, a physical downlink channel scheduled by the configuration signaling, wherein the target receiving beam is a receiving beam for a reference signal RS corresponding to the target TCI state. 
     In Step  307 , the terminal determines a serial number corresponding to each TCI state of the target TCI group by sorting all TCI states of the target TCI group in an ascending order of TCI state identifiers. 
     In Step  308 , the terminal determines a TCI state whose serial number matches a target serial number carried in the configuration signaling as a target TCI state. 
     In Step  309 , the terminal determines a target signal identifier corresponding to a target TCI state identifier of the target TCI state according to the TCI state correspondence table. 
     In Step  310 , the terminal takes a receiving beam for receiving a target reference signal as a target receiving beam; 
     wherein the target reference signal is a reference signal indicated by the target signal identifier. 
     In Step  311 , the terminal receives a physical downlink channel scheduled by the configuration signaling through the target receiving beam. 
     In the above embodiment, the base station may first transmit the target RRC signaling to the terminal, such that both the TCI state correspondence table and the TCI group information are transmitted to the terminal through the target RRC signaling. Furthermore, the base station transmits the activation signaling to the terminal to activate all the TCI states of the target TCI group, and then, the base station transmits the configuration signaling to the terminal to indicate that the receiving beam for the reference signal corresponding to the target TCI state is taken as the target receiving beam, such that the terminal receive the physical downlink channel scheduled by the configuration signaling through the target receiving beam. In the above process, by grouping the TCI states, a smaller number of bits in the activation signaling may be used to indicate whether each TCI group is activated. Once the target TCI group is activated, all TCI states of the target TCI group are activated, which reduces overhead of the activation signaling and saves resources of the base station. 
     Corresponding to the method embodiments for implementing the application functions, embodiments of the present disclosure further provides devices of configuring transmission configuration indication and corresponding base stations and terminals. 
     Referring to  FIG. 10 , which is a block diagram illustrating a device for configuring transmission configuration indication, the device is applicable to a base station and includes: 
     a first transmitting module  410 , configured to transmit, and after establishing a radio resource control (RRC) connection with a terminal, an activation signaling to the terminal, wherein the activation signaling is to activate all TCI states of a target TCI group, and the target TCI group includes a plurality of TCI states; and 
     a second transmitting module  420 , configured to transmit a configuration signaling to the terminal, wherein the configuration signaling is to instruct the terminal to receive a physical downlink channel scheduled by the configuration signaling through a target receiving beam, the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state, and the target TCI state is a TCI state of the target TCI group indicated by the configuration signaling. 
     In the above-mentioned embodiment, a base station may transmit an activation signaling to a terminal after establishing an RRC connection with the terminal, thereby activating all TCI states of the target TCI group. Furthermore, the base station transmits a configuration signaling to the terminal to indicate a receiving beam for a reference signal corresponding to a target TCI state in the activated TCI group as a target receiving beam, such that the terminal may receive a physical downlink channel scheduled by the configuration signaling through the target receiving beam. In the above process, by grouping the TCI states, a smaller number of bits in the activation signaling can be used to indicate whether each TCI group is activated. Once the target TCI group is activated, all TCI states of the target TCI group are activated, which reduces overhead of the activation signaling and saves resources of the base station. 
     Referring to  FIG. 11 , which illustrates a block diagram of another device for configuring transmission configuration indication on the basis of the embodiment as illustrated in  FIG. 10 , the device further includes: 
     a third transmitting module  430 , configured to transmit, through a target RRC signaling, a TCI state correspondence table to the terminal, wherein the TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. 
     In the foregoing embodiment, the base station may transmit a TCI state correspondence table to the terminal through the target RRC signaling before transmitting the activation signaling to the terminal, wherein the TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. In the embodiment of the present disclosure, the base station transmits the TCI state correspondence table to the terminal, so that the terminal can subsequently determine a target receiving beam for receiving a physical downlink channel scheduled by the configuration signaling according to the TCI state correspondence table, with high availability. 
     In some embodiments of the present disclosure, the target RRC signaling further includes grouping indication information, which is used to indicate a TCI state corresponding to each TCI state identifier in the TCI state correspondence table. 
     In the above embodiment, the base station may further transmit the grouping indication information to the terminal through the target RRC signaling, so that the terminal can determine the TCI state of each TCI group in the TCI state correspondence table according to the grouping indication information. And subsequently, the base station may use a smaller number of bits in an activation signaling to indicate whether each TCI group is activated, and in response to that a target TCI group is activated, all TCI states of the target TCI group are activated, thereby reducing overhead of the activation signaling. 
     Referring to  FIG. 12 , which is a block diagram illustrating another device for configuring transmission configuration instructions based on the embodiment as illustrated in  FIG. 10 , the first transmitting module  410  includes: 
     a first transmitting sub-module  411 , configured to transmit an activation signaling to the terminal, wherein the activation signaling indicates whether all TCI states of each TCI group are activated. 
     In the above embodiment, in a case that the base station transmits the activation signaling, the activation signaling can indicate whether all TCI states of each TCI group are activated, so that the terminal can determine, after receiving the activation signaling, that all TCI states of the target TCI group are activated, which reduces overhead of the activation signaling and saves resources of the base station. 
     Referring to  FIG. 13 , which is a block diagram illustrating another configuration device for configuring transmission configuration indication based on the embodiment as illustrated in  FIG. 10 , the second transmitting module  420  includes: 
     a first determining sub-module  421 , configured to determine a serial number of each TCI state of the target TCI group by sorting all TCI states of the target TCI group in an ascending order of TCI state identifiers; 
     a second determining sub-module  422 , configured to determine a target serial number of the target TCI state; and 
     a second transmitting sub-module  423 , configured to transmit the configuration signaling carrying the target serial number to the terminal. 
     In the foregoing embodiment, the base station may determine a serial number of each TCI state of the target TCI group by sorting all TCI states of the target TCI group in an ascending order of TCI state identifiers. The base station may transmit the target serial number to the terminal through the configuration signaling. At the terminal side, a corresponding target TCI state may be determined according to the target serial number, such that a target receiving beam may be determined. Through the above process, after activating the target TCI group, the base station may enable the terminal to quickly determine the target TCI state in the activated target TCI group through the configuration signaling, thus, it also saves the overhead of the activation signaling while guarantee services of the terminal. 
     Referring to  FIG. 14 , which illustrates a block diagram of a device for configuring transmission configuration indication according to an exemplary embodiment, the device is applicable to a terminal and includes: 
     a first receiving module  510 , configured to receive, after establishing a radio resource control (RRC) connection with a base station, an activation signaling from the base station; 
     an activation module  520 , configured to activate all TCI states of a target TCI group indicated by the activation signaling, wherein the target TCI group includes a plurality of TCI states; 
     a determining module  530 , configured to determine a target receiving beam after receiving a configuration signaling from the base station, wherein the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state, and the target TCI state is a TCI state of the target TCI group indicated by the configuration signaling; and 
     a second receiving module  540 , configured to receive a physical downlink channel scheduled by the configuration signaling through the target receiving beam. 
     In the foregoing embodiment, the terminal may receive an activation signaling from a base station after establishing an RRC connection with the base station, and activate all TCI states of the target TCI group according to the activation signaling. Further, according to a received configuration signaling, a target TCI state is determined in the target TCI group, and a receiving beam for a reference signal corresponding to the target TCI state is taken as a target receiving beam. The terminal may receive a physical downlink channel scheduled by the configuration signaling through the target receiving beam. In the above process, by grouping the TCI states, the base station can use a smaller number of bits in the activation signaling to indicate whether each TCI group is activated, and the terminal can activate all TCI states of the target TCI group indicated by the activation signaling, thereby reducing overhead of the activation signaling and saving resources of the base station. 
     Referring to  FIG. 15 ,  FIG. 15  is a block diagram illustrating another device for configuring transmission configuration indication based on the embodiment as illustrated in  FIG. 14 , and the device further includes: 
     a third receiving module  550 , configured to receive, through a target RRC signaling, a TCI state correspondence table from the base station, wherein the TCI state correspondence table includes a correspondence between a TCI state identifier and a signal identifier, the TCI state identifier comprises a state identifier of each TCI state, and the signal identifier comprises an identifier of a reference signal for a current TCI state. 
     In the foregoing embodiment, a terminal may receive, through a target RRC signaling, a TCI state correspondence table from a base station before receiving an activation signaling from the base station. The TCI state correspondence table includes a correspondence between TCI state identifiers and signal identifiers, the TCI state identifiers comprises a state identifier of each TCI state, and the signal identifiers comprises an identifier of a reference signal for a current TCI state. It is convenient for the terminal to subsequently determine a target receiving beam for receiving a physical downlink channel scheduled by the configuration signaling according to the TCI state correspondence table, and the availability is high. 
     In some embodiments of the present disclosure, the target RRC signaling further includes grouping indication information, which is used to indicate a TCI group corresponding to each TCI state identifier in the TCI state correspondence table. 
     In the above embodiment, the terminal may further receive a target RRC signaling including grouping indication information, so that the terminal can determine TCI states of each TCI group in the TCI state correspondence table according to the grouping indication information, and subsequently the base station may use a relatively small number of bits in the activation signaling to indicate whether each TCI group is activated, and in response to determining that the target TCI group is activated, all TCI states of the target TCI group are activated, thereby reducing overhead of the activation signaling. 
     Referring to  FIG. 16 ,  FIG. 16  is a block diagram illustrating another device for configuring transmission configuration indication based on the embodiment as illustrated in  FIG. 14 . The determining module  530  includes: 
     a third determining sub-module  531 , configured to determine a serial number for each TCI state of the target TCI group by sorting all TCI states of the target TCI group in an ascending order of TCI state identifiers; 
     a fourth determining sub-module  532 , configured to determine a TCI state whose serial number matches a target serial number carried by the configuration signaling as a target TCI state; 
     a fifth determining sub-module  533 , configured to determine a target signal identifier corresponding to a target TCI state identifier of the target TCI state according to the TCI state correspondence table; and 
     a sixth determining sub-module  534 , configured to take a receiving beam for receiving a target reference signal as a target receiving beam, wherein the target reference signal is a reference signal indicated by the target signal identifier. 
     In the foregoing embodiment, the terminal may determine a serial number corresponding to each TCI state of the target TCI group by sorting all the TCI states of the activated target TCI group in an ascending order of TCI state identifiers. The target TCI state is a TCI state whose serial number matches the target serial number carried by the configuration signaling. According to the previously received TCI state correspondence table, the target TCI state in the target TCI group, as well as its corresponding target signal identifier, can be quickly determined. A reference signal indicated by the target signal identifier is the target reference signal, and the terminal takes a receiving beam for receiving the target reference signal as a target receiving beam. Through the above process, the terminal can quickly determine the target TCI state of the activated target TCI group after activating the target TCI group, and finally determine the target receiving beam, thereby saving overhead of the activation signaling as well as resources of the base station while guaranteeing services of the terminal. 
     As for the device embodiment, it basically corresponds to the method embodiment, and the relevant part can be referred to the part of the description of the method embodiment. The device embodiments described above are merely illustrative. The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located at one place, or they may be distributed to a plurality of network units. Some or all of the modules can be selected according to actual requirement to achieve the objectives of the solutions of the present disclosure. One of ordinary skill in the art can understand and implement it without creative work. 
     Correspondingly, the present disclosure further provides a computer-readable storage medium, the storage medium stores a computer program, and in a case of executing the computer program, operations of any one of the methods for configuring transmission configuration indication applicable to a base station are implemented. 
     Correspondingly, the present disclosure further provides a computer-readable storage medium, the storage medium stores a computer program, and in a case of executing the computer program, operations of any one of the methods for configuring transmission configuration indication applicable to a terminal are implemented. 
     Correspondingly, the present disclosure further provides an apparatus for configuring transmission configuration indication. The apparatus is applicable to a base station and includes: 
     a processor; 
     a memory configured to store instructions executable by the processor; 
     wherein, the processor is configured to: 
     transmit, after establishing a radio resource control (RRC) connection with a terminal, an activation signaling to the terminal, wherein the activation signaling is to activate all TCI states of a target TCI group, and the target TCI group includes a plurality of TCI state; and 
     transmit a configuration signaling to the terminal, wherein the configuration signaling to instruct the terminal to receive a physical downlink channel scheduled by the configuration signaling through a target receiving beam, the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state, and the target TCI state is a TCI state of the TCI group indicated by the configuration signaling. 
     As illustrated in  FIG. 17 , which is a schematic structural diagram illustrating an apparatus  1700  for configuring transmission indication according to an exemplary embodiment. The apparatus  1700  may be provided as a base station. Referring to  FIG. 17 , the apparatus  1700  includes a processing component  1722 , a wireless transmitting/receiving component  1724 , an antenna component  1726 , and a signal processing part specific to a wireless interface. The processing component  1722  may further include one or more processors. 
     A processor of the processing component  1722  may be configured to implement operations of any of the methods for configuring transmission configuration indication which is applicable to a base station. 
     Correspondingly, the present disclosure further provides an apparatus for configuring transmission configuration indication. The apparatus is applicable to a terminal and includes: 
     a processor; 
     a memory configured to store instructions executable by the processor; 
     wherein, the processor is configured to: 
     receive, after establishing a radio resource control (RRC) connection with a base station, an activation signaling from the base station; 
     activate all TCI states of a target TCI group indicated by the activation signaling, wherein the target TCI group includes a plurality of TCI states; 
     determine a target receiving beam after receiving a configuration signaling from the base station, wherein the target receiving beam is a receiving beam for a reference signal corresponding to a target TCI state, and the target TCI state is a TCI state of the TCI group indicated by the configuration signaling; and 
     receive a physical downlink channel scheduled by the configuration signaling through the target receiving beam. 
       FIG. 18  is a schematic structural diagram illustrating an apparatus for configuring transmission configuration indication according to an exemplary embodiment. Referring to  FIG. 18 , an apparatus for configuring transmission configuration indication is illustrated according to an exemplary embodiment. The apparatus  1800  may be a computer, a mobile phone, a digital broadcasting terminal, a messaging device, a game console, a tablet device, or a medical device, fitness equipment, a personal digital assistant and other terminals. 
     Referring to  FIG. 18 , the apparatus  1800  may include one or more of the following components: a processing component  1801 , a memory  1802 , a power supply component  1803 , a multimedia component  1804 , an audio component  1805 , an input/output (I/O) interface  1806 , a sensor component  1807 , and a communication component  1808 . 
     The processing component  1801  generally controls overall operations of the apparatus  1800 , such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component  1801  may include one or more processors  1809  to execute instructions to complete all or part of the steps of the foregoing method. In addition, the processing component  1801  may include one or more modules to facilitate interaction between the processing component  1801  and other components. For example, the processing component  1801  may include a multimedia module to facilitate interaction between the multimedia component  1804  and the processing component  1801 . 
     The memory  1802  is configured to store various types of data to support operations of the apparatus 1800 . Examples of such data include instructions for any application or method operating on the apparatus  1800 , contact data, phone book data, messages, pictures, videos, etc. The memory  1802  can be implemented by any type of volatile or non-volatile storage device or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, a magnetic disk or an optical disk. 
     The power supply component  1803  is configured to supply power to various components of the apparatus  1800 . The power supply component  1803  may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the apparatus  1800 . 
     The multimedia component  1804  includes a screen that provides an output interface between the apparatus  1800  and the user. In some embodiments of the present disclosure, the screen may include a liquid crystal display (LCD) and a touch panel (TP). In a case that the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense a boundary of the touch or the slide operation, but also detect duration and pressure related to the touch or the slide operation. In some embodiments of the present disclosure, the multimedia component  1804  includes a front camera and/or a rear camera. When the apparatus  1800  is in an operation mode, such as an image shooting mode or a video recording mode, the front camera and/or the rear camera may receive external multimedia data. Each of the front camera and the rear camera may be a fixed optical lens system or a lens system with a focal length and optical zooming capabilities. 
     The audio component  1805  is configured to output and/or input audio signals. For example, the audio component  1805  includes a microphone (MIC), and in a case that the apparatus  1800  is in an operation mode, such as a calling mode, a recording mode, and a voice recognition mode, the microphone is configured to receive external audio signals. The received audio signal may be further stored in the memory  1802  or be transmitted via the communication component  1808 . In some embodiments, the audio component  1805  further includes a speaker for outputting audio signals. 
     The I/O interface  1806  provides an interface between the processing component  1801  and a peripheral interface module. The peripheral interface module may be a keyboard, a click wheel, a button, and the like. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button. 
     The sensor component  1807  includes one or more sensors for providing the apparatus  1800  with various aspects of status assessment. For example, the sensor component  1807  may detect the ON/OFF state of the apparatus  1800  as well as relative positioning of components, for example, the components are the display and the keypad of the apparatus  1800 . The sensor component  1807  may further detect position change of the apparatus  1800  or of a component of the apparatus  1800 , presence or absence of contact between the user and the apparatus  1800 , orientation or acceleration/deceleration of the apparatus  1800 , and temperature change of the apparatus  1800 . The sensor component  1807  may include a proximity sensor configured to detect presence of nearby objects in a case that there is no physical contact. The sensor component  1807  may further include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments of the present disclosure, the sensor component  1807  may further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor. 
     The communication component  1808  is configured to facilitate wired or wireless communication between the apparatus  1800  and other apparatus. The apparatus  1800  can access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment of the present disclosure, the communication component  1808  receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel In an exemplary embodiment of the present disclosure, the communication component  1808  further includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies. 
     In an exemplary embodiment of the present disclosure, the apparatus  1800  may be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing equipment (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors, or other electronic components, so as to perform the above methods. 
     In an exemplary embodiment of the present disclosure, there is further provided a non-transitory computer-readable storage medium including instructions, such as a memory  1802  including instructions, which may be executed by the processor  1809  of the apparatus  1800  to complete the foregoing method. For example, the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and etc. 
     In a case that the instructions in the storage medium are executed by the processor, the apparatus  1800  may perform operations of any of the foregoing methods for configuring transmission configuration indication that is applicable to a terminal side. 
     One of ordinary skill in the art will easily conceive of other embodiments of the present disclosure after considering the description and practicing the present disclosure disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptive changes of the present disclosure, and these variations, uses, or adaptive changes follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The description and the embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are defined by the appended claims. 
     It should be understood that the present disclosure is not limited to the exact structures that has been described above and illustrated in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only defined by the appended claims.