Communication method, communication device, and communication system

Abstract

The present disclosure relates to the technical field of communications. Provided are a communication method, a communication device, and a communication system. The method comprises: for a terminal that supports a unified TCI state configuration and that is configured by a network device to be in a unified transmission configuration indication mode, first information sent by the network device can be received, and a first configuration is updated on the basis of the first information, the first configuration being used for determining a PL offset corresponding to a UL-only TRP. By applying the solution put forth in the embodiments of the present disclosure, updating of a PL offset corresponding to a UL-only TRP can be achieved.

Description

Communication method, communication device and communication system TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of communication, and in particular to a communication method, a communication device and a communication system. BACKGROUND

[0002] In order to improve the coverage of the cell edge and provide more balanced service quality in the service area, multi-point cooperation is still an important technical means in the New Radio (NR) system. From the perspective of network morphology, network deployment in the manner of a large number of distributed access points + baseband centralized processing will be more conducive to providing balanced user experience rate, and significantly reducing the latency and signaling overhead caused by handover.

[0003] SUMMARY

[0004] The present disclosure provides a communication method, a communication device and a communication system. For a terminal configured with unified TCI state and configured by a network device in a unified transmission configuration indication manner, the path loss offset corresponding to an UL-only TRP can be updated.

[0005] A first aspect embodiment of the present disclosure provides a communication method, executed by a terminal supporting unified TCI state configuration and configured by a network device in a unified transmission configuration indication manner, the method comprising: receiving first information sent by the network device, the first information comprising information indicating a unified TCI state supporting single transmission and receiving point (S-TRP) transmission; updating a first configuration according to the first information; wherein the first configuration is used to determine the PL offset corresponding to the UL-only TRP.

[0006] A second aspect embodiment of the present disclosure provides a communication method, executed by a network device, the method comprising: sending first information to a terminal, the terminal supporting unified TCI state configuration and configured by the network device in a unified transmission configuration indication manner; wherein the first information comprises information indicating a unified TCI state supporting S-TRP transmission, and the first information is used to update a first configuration, and the first configuration is used to determine the PL offset corresponding to the UL-only TRP.

[0007] A third aspect embodiment of the present disclosure provides a communication method, comprising: a network device sending first information to a terminal, the first information comprising information indicating unified TCI state supporting S-TRP transmission, the terminal supporting unified TCI state configuration and being configured by the network device as a unified transmission configuration indication mode; the terminal receiving the first information and updating a first configuration according to the first information; wherein the first configuration is used to determine PL offset corresponding to UL-only TRP.

[0008] A fourth aspect embodiment of the present disclosure provides a terminal supporting unified TCI state configuration and being configured by a network device as a unified transmission configuration indication mode, comprising: a transceiver module configured to receive first information sent by the network device, the first information comprising information indicating unified TCI state supporting S-TRP transmission; and a processing module configured to update a first configuration according to the first information; wherein the first configuration is used to determine PL offset corresponding to UL-only TRP.

[0009] A fifth aspect embodiment of the present disclosure provides a network device, comprising: a transceiver module configured to send first information to a terminal, the first information comprising information indicating unified TCI state supporting S-TRP transmission, the terminal supporting unified TCI state configuration and being configured by the network device as a unified transmission configuration indication mode; wherein the first information is used to update a first configuration, and the first configuration is used to determine PL offset corresponding to UL-only TRP.

[0010] A sixth aspect embodiment of the present disclosure provides a communication device, comprising: one or more processors; wherein the processor is configured to execute the method of the first aspect embodiment, or is configured to execute the method of the second aspect embodiment.

[0011] A seventh aspect embodiment of the present disclosure provides a communication system, comprising: a terminal and a network device; the terminal executes the method of the first aspect embodiment, and the network device executes the method of the second aspect embodiment.

[0012] An eighth aspect embodiment of the present disclosure provides a computer storage medium, wherein the computer storage medium stores computer executable instructions; the computer executable instructions are executed by a processor to implement the method of the first aspect embodiment, or the method of the second aspect embodiment.

[0013] A ninth aspect of the present disclosure provides a computer program product, wherein the computer program product stores a computer program; and the computer program, when executed by a processor, enables the method according to the first aspect or the second aspect to be implemented.

[0014] Additional aspects and advantages of the present disclosure will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0015] The above and / or additional aspects and advantages of the present disclosure will become apparent and be readily appreciated from the following description, including the accompanying drawings.

[0016] FIG. 1 is a schematic diagram of an example of a MAC CE;

[0017] FIG. 2 is a schematic diagram of an architecture of a communication system according to an embodiment of the present disclosure;

[0018] FIG. 3 is a schematic diagram of a flow of a communication method according to an embodiment of the present disclosure;

[0019] FIG. 4 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0020] FIG. 5 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0021] FIG. 6 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0022] FIG. 7 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0023] FIG. 8 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0024] FIG. 9 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0025] FIG. 10 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0026] FIG. 11 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0027] FIG. 12 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0028] FIG. 13 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0029] FIG. 14 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0030] FIG. 15 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0031] FIG. 16 is a schematic diagram of an example according to an embodiment of the present disclosure;

[0032] FIG. 17 is a flow diagram of a communication method according to an embodiment of the present disclosure;

[0033] FIG. 18 is a flow diagram of a communication method according to an embodiment of the present disclosure;

[0034] FIG. 19 is a block diagram of a terminal according to an embodiment of the present disclosure;

[0035] FIG. 20 is a block diagram of a network device according to an embodiment of the present disclosure;

[0036] FIG. 21 is a structural diagram of a communication device according to an embodiment of the present disclosure;

[0037] FIG. 22 is a structural diagram of a chip according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0038] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. Examples of the embodiments are shown in the drawings, in which the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below with reference to the drawings are examples for explaining the present disclosure and are not intended to be limiting of the present disclosure. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0039] For ease of understanding, first introduce the terms related to the embodiments of the present disclosure.

[0040] 1. Transmission and Receiving Point (TRP)

[0041] With the increase of frequency bands, from the perspective of ensuring network coverage, relatively dense access points also need to be deployed. In the high frequency band, with the increase of the integration of active antenna devices, it will be more inclined to use modular active antenna arrays. The antenna array of each TRP can be divided into several relatively independent antenna panels, so the shape and port number of the entire array surface can be flexibly adjusted according to the deployment scene and business needs. The antenna panels or TRPs can also be connected by optical fibers for more flexible distributed deployment. In the millimeter wave band, with the decrease of wavelength, the blocking effect of obstacles such as human bodies or vehicles will be more significant. In this case, from the perspective of ensuring the robustness of link connection, the cooperation between multiple TRPs or panels can also be used to transmit / receive from multiple beams at multiple angles, thereby reducing the adverse effects of the blocking effect.

[0042] According to the mapping relationship of sending signal stream to multiple TRPs / panels, the multi-point cooperative transmission technology can be divided into coherent and non-coherent transmission. Among them, in the coherent transmission, each data layer is mapped to multiple TRPs / panels through a weighting vector. In the non-coherent transmission, each data stream is only mapped to part of the TRP / panel. The coherent transmission has higher requirements for the synchronization between the transmission points and the transmission capacity of the backhaul link, and is more sensitive to many non-ideal factors in the real deployment conditions. In contrast, the non-coherent transmission is less affected by the above factors, so it is the key consideration scheme of the multi-point transmission technology. The uplink PUSCH transmission is transmitted to multiple base station TRPs. In R17, the main standardization is the cooperative transmission under the time division multiplexing (TDM) transmission mode. The same information of the physical uplink shared channel (PUSCH) is sent to different TRPs of the base station through the time domain transmission occasion (TO) in different transmission times. This method has lower requirements for terminal capability and does not require the ability to support simultaneous transmission beams, and the transmission delay is large.

[0043] For uplink, the actual channel of the PUSCH channel facing different TRPs may have very different spatial characteristics, so it is considered that the Doppler shift characteristics (QCL-D) of the quasi co-location of the PUSCH channel in different transmission directions are different.

[0044] R15 / 16 does not consider the multi-transmission reception point (M-TRP) scenario, and the uplink is single-TRP transmission. R17 enhances the M-TRP uplink transmission under single-downlink control information (S-DCI). The uplink PUSCH transmission is transmitted to multiple base station TRPs. In R17, the main standardization is the cooperative transmission under the TDM transmission mode. The same information of the PUSCH is sent to different cooperative TRPs of the base station through the time domain transmission occasion (TO) in different transmission times. This method has lower requirements for terminal capability, and each TO only needs to send a TRP direction PUSCH / physical uplink control channel (PUCCH), so it does not require the ability to support simultaneous transmission beams, and the transmission period is large.

[0045] In R17 non-codebook and codebook based M-TRP transmission, the Sounding Reference Signal Resource Indication (SRI) field in DCI indicates the SRS resource in SRS resource set. Since R17 supports two SRS resource sets, in R17 non-codebook based M-TRP PUSCH repetition transmission, two SRI fields associated with two SRS resource sets are included in DCI format 0_1 / 0_2, each SRI field indicates SRI for one TRP. The first SRI field is designed based on R15 / 16 framework, and the same number of layers is used for all repetitions.

[0046] For non-codebook based transmission, the first SRI field is used to determine the elements in the second SRI field, and the second SRI field only contains SRI combinations associated with the number of layers indicated by the first SRI field. The number of bits N2 of the second SRI field is determined by the maximum code point number of each rank associated with the first SRI field.

[0047] In codebook based M-TRP PUSCH repetition transmission, two Transmission Precoding Matrix Indication (TPMI) fields are indicated in DCI format 0_1 / 0_2, where the first TPMI field is designed the same as the TPMI field in R15 / 16 (including TPMI index and number of layers), and the second TPMI field only contains the second TPMI index, and the number of layers is the same as the number of layers indicated by the first TPMI field. The first TPMI field is used to determine the elements in the second TPMI field, and the second TPMI field only contains TPMI associated with the number of layers indicated by the first TPMI field. The number of bits M2 of the second TPMI field is determined by the maximum code point number of each rank associated with the first TPMI field.

[0048] 2. Transmission Configuration Indication state (TCI state)

[0049] The unified TCI state indicated by the terminal for the downlink TCI state or joint TCI state is used to determine the downlink transmission beam, and the uplink TCI state or joint TCI state is used to determine the uplink beam. Here, the downlink beam refers to the beam of the user-specific Physical Downlink Shared Channel (PDSCH) and all / part of the PDCCH in a Carrier Component (CC), and the uplink beam refers to the uplink transmission space filter based on the dynamic grant / configurable grant PUSCH and all or part of the dedicated PUCCH resource of a CC.

[0050] For downlink TCI states and joint TCI states in independent beam indication, one TCI state pool is adopted. For the case of joint beam indication, the TCI field only needs to indicate one joint TCI state, which is used to determine the uplink and downlink transmission beams. However, for the case of independent beam indication, the downlink transmission beam and the uplink transmission beam are no longer the same, and each needs to be indicated. Moreover, there are three scenarios: the downlink transmission beam and the uplink transmission beam need to be indicated for a user at the same time, only the downlink transmission beam needs to be indicated for a user, or only the uplink transmission beam needs to be indicated for a user. Therefore, the mapping relationship between the TCI field in DCI format 1_1 / 1_2 and the TCI state in the case of independent beam indication is as follows:

[0051] One code point of the TCI field can correspond to one downlink TCI state and one uplink TCI state at the same time;

[0052] One code point of the TCI field corresponds to only one downlink TCI state, at which time the user keeps the current UL TCI state unchanged;

[0053] One code point of the TCI field corresponds to only one uplink TCI state, at which time the user keeps the current DL TCI state unchanged.

[0054] The MAC CE is used for activation or deactivation of unified TCI state, that is, unified TCI state MAC CE, which supports joint transmission configuration indication state (joint TCI state) mode and independent transmission configuration indication state (separate TCI state) configuration. As shown in FIG. 1, the unified TCI state MAC CE is shown, wherein CORESET Pool ID: this field indicates that the mapping between the activated TCI state and the TCI state ID in the DCI transmission configuration indication field is specific to the ControlResourceSetId configured by the CORESET Pool ID, as specified in TS 38.331 [5]. If this field is set to 1, it indicates that the TCI state is specified to the CORESET pool ID equal to 1, otherwise the TCI state is specified to the CORESET pool ID equal to 0. If more than one coresetPoolIndex value is not configured for any CORESET in a partial bandwidth (BWP), there are R bits;

[0055] Serving Cell ID: This field indicates the identity of the serving cell for which this MAC-CE is applicable. The field is 5 bits long. If the indicated serving cell is configured as part of simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3, or simultaneousU-TCI-UpdateList4 as specified in TS 38.331 [5], this MAC-CE is applicable to all serving cells in these lists;

[0056] Downlink BWP ID (DL BWP ID): This field indicates the downlink BWP for which the MAC-CE is applicable as a codepoint of the DCI bandwidth part indication field as specified in TS 38.212 [9]. The field is 2 bits long;

[0057] Uplink BWP ID (UL BWP ID): This field indicates the uplink BWP for which the MAC-CE is applicable as a codepoint of the DCI bandwidth part indication field as specified in TS 38.212 [9]. If the unifiedTCI-StateType value in the serving cell indicated by the Serving Cell ID is joint, this field is considered as a reserved bit. The field is 2 bits long;

[0058] Pi: This field indicates whether each TCI codepoint contains multiple TCI states or a single TCI state. If the Pi field is set to 1, it indicates that the ith TCI codepoint contains a downlink TCI state and an uplink TCI state. If the Pi field is set to 0, it indicates that the ith TCI codepoint contains only a downlink / joint TCI state or an uplink TCI state. The codepoint to which a TCI state is mapped is determined by its position in the sequence of all TCI state ID fields;

[0059] D / U: This field indicates whether the TCI state ID in the same byte is for joint / downlink or uplink TCI state. If this field is set to 1, the TCI state ID in the same byte is for joint / downlink. If this field is set to 0, the TCI state ID in the same byte is for uplink;

[0060] TCI State ID: This field indicates the TCI state identified by TCI-StateId, as specified in TS 38.331[5]. If D / U is set to 1, a 7-bit TCI state ID, i.e., TCI-StateId, is used, as specified in TS 38.331[5]. If D / U is set to 0, the most significant bit of the TCI state ID is treated as a reserved bit, and the remaining 6 bits indicate TCI-UL-State-Id, as specified in TS 38.331[5]. The maximum number of active TCI states is 16;

[0061] R: Reserved bits, can be set to 0.

[0062] 3. Uplink only (UL-only)

[0063] In multi-TRP transmission, future research will continue to focus on enhancing uplink transmission. The main research area is multi-TRP deployment scenarios with downlink S-TRP / uplink M-TRP. In this scenario, deploying multiple uplink receiving points can further improve uplink coverage and throughput at a lower network deployment cost, while avoiding complex network planning and downlink interference management and coordination issues.

[0064] Uplink (UL) coverage and throughput can be improved by deploying heterogeneous networks to achieve asymmetric multi-TRP transmission (downlink single TRP / uplink multiple TRP). Since the macro gNB and micro node UL TRPs have different power ratings, the terminal can receive downlink (DL) transmissions from the macro gNB but transmit UL to the macro gNB or a non-co-located micro node UL TRP to maximize UL throughput. As an option to further reduce power consumption, the micro node can reduce or even disable DL transmissions; unlike the Small Cell, this node is only used for uplink reception. The specific TCI state indication method used depends on the beamforming result and is configured to the terminal by the network. Currently, the protocol only supports configuring the current beam indication as either the joint TCI state mode or the separate TCI state mode. For example, the joint TCI state is only applied to the Sub-6GHz band (FR1); the separate TCI state can be applied to the FR1+mmWave band (FR2).

[0065] For a terminal supporting unified TCI state configuration, the network device configures the unified transmission configuration indication unified TCI mode, for FR1: one joint TCI state or {one downlink transmission configuration indication state (DL TCI state) + one uplink transmission configuration indication state (UL TCI state)} can be applied; for FR2: {one DL TCI state + one UL TCI state} can be applied.

[0066] In the UL-only scenario, the cell includes one macro gNB and multiple UL-only TRP reception points. In order for the terminal to perform downlink S-TRP / uplink M-TRP transmission, the base station needs to perform uplink / downlink beam management processes and configure / indicate beam information for data / signal transmission to the terminal. The uplink M-TRP transmission needs to be completed in cooperation between the macro gNB and the UL-only TRP, or in cooperation between different UL-only TRPs.

[0067] Embodiments of the present disclosure provide a communication method, a communication device and a communication system.

[0068] In a first aspect, embodiments of the present disclosure provide a communication method, performed by a terminal, the terminal supporting unified TCI state configuration and being configured by a network device in a unified transmission configuration indication mode, the method comprising: receiving first information sent by the network device, the first information comprising information indicating that unified TCI state supporting S-TRP transmission; updating a first configuration according to the first information; wherein the first configuration is used to determine a PL offset corresponding to a UL-only TRP.

[0069] By applying the technical solutions of the present disclosure, for a terminal supporting unified TCI state configuration and being configured by a network device in a unified transmission configuration indication mode, the PL offset corresponding to a UL-only TRP can be updated.

[0070] In combination with some embodiments of the first aspect, at least one of the following includes the first configuration:

[0071] A first joint transmission configuration indication state (joint TCI state), the first joint TCI state being configured through radio resource control (RRC) signaling;

[0072] a first uplink transmission configuration indication (UL TCI) state, the first UL TCI state being configured by RRC signaling;

[0073] a second joint TCI state, the second joint TCI state being activated by a media access control (MAC) control element (CE) indication;

[0074] a second UL TCI state, the second UL TCI state being activated by a MAC CE indication;

[0075] a third joint TCI state, the third joint TCI state being applied by a downlink control information (DCI) indication, or being applied by a joint DCI and RRC signaling indication;

[0076] a third UL TCI state, the third UL TCI state being applied by a DCI indication, or being applied by a joint DCI and RRC signaling indication.

[0077] In some embodiments in combination with the first aspect, the first information comprises a first MAC CE.

[0078] In some embodiments in combination with the first aspect, an indication field in the first MAC CE is used to indicate an updated value of the PL offset.

[0079] In some embodiments in combination with the first aspect, a number of bits used in the indication field is determined according to an indication range and an indication step size of the PL offset.

[0080] In some embodiments in combination with the first aspect, the indication step size comprises one of:

[0081] 1 dB; 2 dB; 4 dB.

[0082] In some embodiments in combination with the first aspect, at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value; or,

[0083] 1 bit of an indication field in the first MAC CE is used to indicate a positive or negative value of the updated value, and least significant bit (LSB) 4 bits of an indication field in the first MAC CE are used to indicate an absolute value of the updated value; or,

[0084] At least 5 bits in the first MAC CE are used to indicate a value of the update value, a most significant bit (MSB) indication field is used to indicate a positive or negative value of the update value, and a least significant bit (LSB) indication field is used to indicate an absolute value of the update value.

[0085] In some embodiments of the first aspect, the first MAC CE has at least one first indication field, which is used to indicate whether a TCI codepoint corresponds to a PL offset update of a TCI state.

[0086] In some embodiments of the first aspect, a signaling length of the first MAC CE is determined by the first indication field, and the first indication field is determined by one of the following:

[0087] a first number, which is used to represent a number of TCI state codepoints;

[0088] a second number, which is used to represent a number of joint TCI states corresponding to the TCI state codepoints that need to update the PL offset;

[0089] a third number, which is used to represent a number of UL TCI states corresponding to the TCI state codepoints that need to update the PL offset.

[0090] In some embodiments of the first aspect, the first indication field is a first value, which is used to determine that a TCI codepoint contains a joint TCI state or an UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated.

[0091] the first indication field is a second value, which is used to determine that the TCI codepoint does not contain a joint TCI state and an UL TCI state; or

[0092] the first indication field is a second value, which is used to determine that a TCI codepoint contains a joint TCI state or an UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated.

[0093] wherein the first value and the second value are one of 0 and 1, and the first value is different from the second value.

[0094] In some embodiments of the first aspect, the first MAC CE has at least one second indication field, and the second indication field is used to indicate that the PL offset update value corresponding to the TCI state is a positive value or a negative value.

[0095] In some embodiments of the first aspect, the indication field corresponding to the update value in the first MAC CE includes at least one of the following:

[0096] 1 bit of the second indication field, 3 reserved bits, and 4-bit indication field, wherein the 4-bit indication field is used to indicate the absolute value of the update value.

[0097] 3 reserved bits and 5-bit indication field, wherein the 5-bit indication field is used to indicate the numerical value of the update value.

[0098] 1 bit of the second indication field and 7-bit indication field, wherein the 7-bit indication field is used to indicate the numerical value of the update value.

[0099] 8-bit indication field, wherein the 8-bit indication field is used to indicate the numerical value of the update value.

[0100] 4-bit indication field, wherein the 4-bit indication field is used to indicate the absolute value of the update value.

[0101] In a second aspect, the embodiments of the present disclosure provide a communication method, executed by a network device, the method comprising: sending first information to a terminal, wherein the terminal supports unified TCI state configuration and is configured by the network device in a unified transmission configuration indication mode; wherein the first information includes information indicating unified TCI state supporting S-TRP transmission, and the first information is used to update first configuration, wherein the first configuration is used to determine the PL offset corresponding to the UL-only TRP.

[0102] By applying the technical solutions of the present disclosure, for a terminal supporting unified TCI state configuration and configured by the network device in a unified transmission configuration indication mode, the PL offset corresponding to the UL-only TRP can be updated.

[0103] In some embodiments of the second aspect, the first configuration includes at least one of the following:

[0104] The first joint TCI state is configured by RRC signaling;

[0105] The first UL TCI state is configured by RRC signaling;

[0106] a second joint TCI state, the second joint TCI state being activated by a MAC CE indication;

[0107] a second UL TCI state, the second UL TCI state being activated by a MAC CE indication;

[0108] a third joint TCI state, the third joint TCI state being applied by a DCI indication, or being applied by a joint DCI and RRC signaling indication;

[0109] a third UL TCI state, the third UL TCI state being applied by a DCI indication, or being applied by a joint DCI and RRC signaling indication.

[0110] In some embodiments of the second aspect, the first information comprises a first MAC CE.

[0111] In some embodiments of the second aspect, an indication field in the first MAC CE is used to indicate an updated value of the PL offset.

[0112] In some embodiments of the second aspect, a number of bits used in the indication field is determined according to an indication range and an indication step size of the PL offset.

[0113] In some embodiments of the second aspect, the indication step size comprises one of:

[0114] 1 dB; 2 dB; 4 dB.

[0115] In some embodiments of the second aspect, at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value; or,

[0116] 1 bit of an indication field in the first MAC CE is used to indicate a positive or negative value of the updated value, and LSB 4 bits of an indication field are used to indicate an absolute value of the updated value; or,

[0117] at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value, and MSB of an indication field is used to indicate a positive or negative value of the updated value, and LSB of an indication field is used to indicate an absolute value of the updated value.

[0118] In some embodiments of the second aspect, the first MAC CE has at least one first indication field, the first indication field being used to indicate whether a TCI state corresponding to a TCI codepoint is subject to a PL offset update.

[0119] In some embodiments of the second aspect, a signaling length of the first MAC CE is determined by the first indication field, and the first indication field is determined by one of the following:

[0120] a first number, the first number being used to represent a number of TCI state codepoints;

[0121] a second number, the second number being used to represent a number of joint TCI states corresponding to the TCI state codepoints that need to update the PL offset;

[0122] a third number, the third number being used to represent a number of UL TCI states corresponding to the TCI state codepoints that need to update the PL offset.

[0123] In some embodiments of the second aspect, the first indication field is a first value used to determine that the TCI codepoint contains a joint TCI state or a UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated;

[0124] the first indication field is a second value used to determine that the TCI codepoint does not contain a joint TCI state and a UL TCI state; or,

[0125] the first indication field is a second value used to determine that the TCI codepoint contains a joint TCI state or a UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated;

[0126] wherein the first value and the second value are one of 0 and 1, and the first value is different from the second value.

[0127] In some embodiments of the second aspect, the first MAC CE has at least one second indication field, and the second indication field is used to indicate that the PL offset update value corresponding to the TCI state is a positive value or a negative value.

[0128] In some embodiments of the second aspect, the indication field corresponding to the update value in the first MAC CE includes at least one of the following:

[0129] 1 bit of the second indication field, 3 reserved bits, and a 4-bit indication field used to indicate an absolute value of the update value.

[0130] 3 reserved bits and a 5-bit indication field for indicating a value of the updated value;

[0131] 1 bit of the second indication field and a 7-bit indication field for indicating a value of the updated value;

[0132] 8-bit indication field for indicating a value of the updated value;

[0133] 4-bit indication field for indicating an absolute value of the updated value.

[0134] In a third aspect, an embodiment of the present disclosure provides a communication method, including: a network device sending first information to a terminal, the first information including information indicating a unified TCI state supporting S-TRP transmission, the terminal supporting unified TCI state configuration and being configured by the network device as a unified transmission configuration indication mode; and the terminal receiving the first information and updating a first configuration according to the first information, wherein the first configuration is used to determine a PL offset corresponding to an UL-only TRP.

[0135] In a fourth aspect, an embodiment of the present disclosure provides a terminal supporting unified TCI state configuration and being configured by a network device as a unified transmission configuration indication mode, including: a transceiver configured to receive first information sent by the network device, the first information including information indicating a unified TCI state supporting S-TRP transmission; and a processor configured to update a first configuration according to the first information, wherein the first configuration is used to determine a PL offset corresponding to an UL-only TRP.

[0136] In combination with some embodiments of the fourth aspect, at least one of the following includes the first configuration:

[0137] a first joint TCI state, the first joint TCI state being configured through radio resource control (RRC) signaling;

[0138] a first UL TCI state, the first UL TCI state being configured through RRC signaling;

[0139] a second joint TCI state, which is activated by a media access control (MAC) control element (CE) indication;

[0140] a second UL TCI state, which is activated by a MAC CE indication;

[0141] a third joint TCI state, which is applied by a downlink control information (DCI) indication, or a joint DCI and RRC signaling indication;

[0142] a third UL TCI state, which is applied by a DCI indication, or a joint DCI and RRC signaling indication.

[0143] In some embodiments of the fourth aspect, the first information comprises a first MAC CE.

[0144] In some embodiments of the fourth aspect, an indication field in the first MAC CE is used to indicate an updated value of the PL offset.

[0145] In some embodiments of the fourth aspect, a number of bits used in the indication field is determined according to an indication range and an indication step size of the PL offset.

[0146] In some embodiments of the fourth aspect, the indication step size comprises one of:

[0147] 1 dB; 2 dB; 4 dB.

[0148] In some embodiments of the fourth aspect, at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value; or,

[0149] 1 bit of an indication field in the first MAC CE is used to indicate a positive or negative value of the updated value, and 4 least significant bits (LSB) of an indication field in the first MAC CE are used to indicate an absolute value of the updated value; or,

[0150] at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value, most significant bits (MSB) of an indication field in the first MAC CE are used to indicate a positive or negative value of the updated value, and LSB of an indication field in the first MAC CE are used to indicate an absolute value of the updated value.

[0151] In some embodiments of the fourth aspect, the first MAC CE has at least one first indication field, and the first indication field is used to indicate whether a TCI state corresponding to a TCI codepoint needs to be updated with a PL offset.

[0152] In some embodiments of the fourth aspect, a signaling length of the first MAC CE is determined by the first indication field, and the first indication field is determined by one of the following:

[0153] a first number, the first number being used to represent a number of TCI state codepoints;

[0154] a second number, the second number being used to represent a number of joint TCI states corresponding to the TCI state codepoints that need to be updated with a PL offset;

[0155] a third number, the third number being used to represent a number of UL TCI states corresponding to the TCI state codepoints that need to be updated with a PL offset.

[0156] In some embodiments of the fourth aspect, the first indication field is a first value, which is used to determine that a TCI codepoint contains a joint TCI state or an UL TCI state, and a PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated.

[0157] the first indication field is a second value, which is used to determine that the TCI codepoint does not contain a joint TCI state and an UL TCI state; or,

[0158] the first indication field is the second value, which is used to determine that the TCI codepoint contains a joint TCI state or an UL TCI state, and a PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated.

[0159] In some embodiments of the fourth aspect, the first value and the second value are one of 0 and 1, and the first value is different from the second value.

[0160] In some embodiments of the fourth aspect, the first MAC CE has at least one second indication field, and the second indication field is used to indicate whether a PL offset update value corresponding to a TCI state is a positive value or a negative value.

[0161] In combination with some embodiments of the fourth aspect, the indication field corresponding to the update value in the first MAC CE comprises at least one of the following:

[0162] 1 bit of the second indication field, 3 reserved bits, and 4-bit indication field, the 4-bit indication field being used to indicate an absolute value of the update value;

[0163] 3 reserved bits and 5-bit indication field, the 5-bit indication field being used to indicate a numerical value of the update value;

[0164] 1 bit of the second indication field and 7-bit indication field, the 7-bit indication field being used to indicate a numerical value of the update value;

[0165] 8-bit indication field, the 8-bit indication field being used to indicate a numerical value of the update value;

[0166] 4-bit indication field, the 4-bit indication field being used to indicate an absolute value of the update value.

[0167] In a fifth aspect, the embodiments of the present disclosure provide a network device, comprising: a transceiver module configured to send first information to a terminal, the first information comprising information indicating that unified TCI state supporting S-TRP transmission, the terminal supporting unified TCI state configuration and being configured by the network device in a unified transmission configuration indication manner; wherein the first information is used to update a first configuration, and the first configuration is used to determine a PL offset corresponding to an UL-only TRP.

[0168] In combination with some embodiments of the fifth aspect, the first configuration comprises at least one of the following:

[0169] a first joint TCI state, the first joint TCI state being configured through radio resource control (RRC) signaling;

[0170] a first UL TCI state, the first UL TCI state being configured through RRC signaling;

[0171] a second joint TCI state, the second joint TCI state being activated through a medium access control (MAC) control element (CE);

[0172] a second UL TCI state, the second UL TCI state being activated through a MAC CE;

[0173] a third joint TCI state, which is indicated by a downlink control information (DCI) or jointly indicated by a DCI and RRC signaling;

[0174] a third UL TCI state, which is indicated by a DCI or jointly indicated by a DCI and RRC signaling.

[0175] In some embodiments of the fifth aspect, the first information comprises a first MAC CE.

[0176] In some embodiments of the fifth aspect, an indication field in the first MAC CE is used to indicate the updated value of the PL offset.

[0177] In some embodiments of the fifth aspect, a number of bits used in the indication field is determined according to an indication range and an indication step of the PL offset.

[0178] In some embodiments of the fifth aspect, the indication step comprises one of:

[0179] 1 dB; 2 dB; 4 dB.

[0180] In some embodiments of the fifth aspect, at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value; or,

[0181] 1 bit of an indication field in the first MAC CE is used to indicate a positive or negative value of the updated value, and 4 least significant bits (LSB) of an indication field are used to indicate an absolute value of the updated value; or,

[0182] at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value, a most significant bit (MSB) of an indication field is used to indicate a positive or negative value of the updated value, and an LSB of an indication field is used to indicate an absolute value of the updated value.

[0183] In some embodiments of the fifth aspect, the first MAC CE has at least one first indication field, which is used to indicate whether a TCI state corresponding to a TCI codepoint is updated with a PL offset.

[0184] In some embodiments of the fifth aspect, a signaling length of the first MAC CE is determined by the first indication field, which is determined by one of:

[0185] a first number, the first number being used to indicate a number of TCI state codepoints;

[0186] a second number, the second number being used to indicate a number of TCI state codepoints corresponding to joint TCI states that need to update the PLoffset;

[0187] a third number, the third number being used to indicate a number of TCI state codepoints corresponding to UL TCI states that need to update the PLoffset.

[0188] In some embodiments of the fifth aspect, the first indication field is a first value to determine that the TCI codepoint contains a joint TCI state or an UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated;

[0189] the first indication field is a second value to determine that the TCI codepoint does not contain a joint TCI state and an UL TCI state; or,

[0190] the first indication field is a second value to determine that the TCI codepoint contains a joint TCI state or an UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated;

[0191] wherein the first value and the second value are one of 0 and 1, and the first value is different from the second value.

[0192] In some embodiments of the fifth aspect, the first MAC CE has at least one second indication field, the second indication field being used to indicate that the PL offset update value corresponding to the TCI state is a positive value or a negative value.

[0193] In some embodiments of the fifth aspect, the indication field corresponding to the update value in the first MAC CE includes at least one of the following:

[0194] 1 bit of the second indication field, 3 reserved bits, and a 4-bit indication field, the 4-bit indication field being used to indicate an absolute value of the update value;

[0195] 3 reserved bits and a 5-bit indication field, the 5-bit indication field being used to indicate a numerical value of the update value;

[0196] 1 bit of the second indication field and 7 bits of the indication field, the 7 bits of the indication field being used to indicate a numerical value of the updated value.

[0197] 8 bits of the indication field, the 8 bits of the indication field being used to indicate a numerical value of the updated value.

[0198] 4 bits of the indication field, the 4 bits of the indication field being used to indicate an absolute value of the updated value.

[0199] In a sixth aspect, an embodiment of the present disclosure provides a communication device, which can be a terminal or a network device, comprising: one or more processors; wherein the processor of the terminal is configured to execute the method in the first aspect, and the processor of the network device is configured to execute the method in the second aspect.

[0200] In a seventh aspect, an embodiment of the present disclosure provides a communication system, comprising: a terminal and a network device; the terminal executes the method in the first aspect, and the network device executes the method in the second aspect.

[0201] In an eighth aspect, an embodiment of the present disclosure provides a computer storage medium, wherein the computer storage medium stores computer executable instructions; the computer executable instructions are executed by a processor to implement the method in the first aspect or the method in the second aspect.

[0202] In a ninth aspect, an embodiment of the present disclosure provides a computer program product, comprising a computer program, which is executed by a processor to implement the method in the first aspect or the method in the second aspect.

[0203] In a tenth aspect, an embodiment of the present disclosure provides a computer program, which, when executed on a computer, causes the computer to perform the method in the first aspect or the method in the second aspect.

[0204] In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system. The chip or the chip system comprises processing circuitry configured to perform the method in the first aspect or the method in the second aspect.

[0205] It can be understood that the terminal device, the network device, the communication system, and the storage medium are all used to execute the method provided in the embodiments of the present disclosure. Therefore, the beneficial effects achieved by them can refer to the beneficial effects in the corresponding method, which will not be described here.

[0206] The embodiments of the present disclosure provide a communication method, a communication device and a communication system. In some embodiments, the communication method and the information processing method, the information sending method, the information receiving method and the like can be replaced with each other, the communication device and the information processing device, the information sending device, the information receiving device and the like can be replaced with each other, and the information processing system, the communication system, the information sending system, the information receiving system and the like can be replaced with each other.

[0207] The embodiments of the present disclosure are not exhaustive, but only illustrate some embodiments, and are not specific limitations on the protection scope of the present disclosure. In the case of no contradiction, each step in an embodiment can be implemented as an independent embodiment, and the steps can be combined arbitrarily, for example, the scheme after removing some steps in an embodiment can also be implemented as an independent embodiment, and the order of the steps in an embodiment can be exchanged arbitrarily, in addition, the optional implementation manners in an embodiment can be combined arbitrarily; in addition, the embodiments can be combined arbitrarily, for example, some or all steps of different embodiments can be combined arbitrarily, an embodiment can be combined with the optional implementation manners of other embodiments.

[0208] In the embodiments of the present disclosure, the terms and / or descriptions between the embodiments are consistent and can be referred to each other if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0209] The terms used in the embodiments of the present disclosure are only for the purpose of describing the specific embodiments, and not as a limitation on the present disclosure.

[0210] In the embodiments of the present disclosure, unless otherwise specified and logically contradictory, the elements expressed in singular form, such as "one", "one", "the", "the above", "the", "the above", "this" and the like, can represent "one and only one", and can also represent "one or more", "at least one" and the like. For example, in the case of using articles such as "a", "an", "the" and the like in English, the noun after the article can be understood as singular expression, and can also be understood as plural expression.

[0211] In the embodiments of the present disclosure, "a plurality of" means two or more.

[0212] In some embodiments, the terms "at least one of", "at least one of", "at least one of", "one or more", "a plurality of", "multiple" and the like can be replaced with each other.

[0213] The description manner such as "at least one of A, B, C, and the like", "A and / or B and / or C, and the like" in the embodiments of the present disclosure includes any one of A, B, and C existing alone, and also includes any combination of any multiple of A, B, and C, and each case can exist alone; for example, "at least one of A, B, and C" includes a case of A alone, a case of B alone, a case of C alone, a case of combination of A and B, a case of combination of A and C, a case of combination of B and C, and a case of combination of A and B and C; for example, A and / or B includes a case of A alone, a case of B alone, and a case of combination of A and B.

[0214] In some embodiments, the description manner such as "A in a case, and B in another case", "in response to a case A, in response to another case B" and the like can include the following technical solutions according to the case: A is executed regardless of B, that is, A in some embodiments; B is executed regardless of A, that is, B in some embodiments; A and B are selectively executed, that is, from A and B, execution is selected in some embodiments; A and B are both executed, that is, A and B in some embodiments. When there are more branches of A, B, C and the like, it is similar to the above.

[0215] The prefix words "first", "second" and the like in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute limitation on the position, order, priority, quantity or content of the description objects. The description of the description objects should be referred to the description in the context of the claims or embodiments, and should not be limited by the prefix words. For example, the description object is "field", and the ordinal words before "field" in "first field" and "second field" do not limit the position or order between "fields", and "first" and "second" do not limit whether the "fields" modified thereby are in the same message or not, and do not limit the order of "first field" and "second field". For another example, the description object is "level", and the ordinal words before "level" in "first level" and "second level" do not limit the priority between "levels". For another example, the quantity of the description object is not limited by the ordinal words, and can be one or more. For example, "first device", wherein the quantity of "device" can be one or more. In addition, the objects modified by different prefix words can be the same or different, for example, the description object is "device", and "first device" and "second device" can be the same device or different devices, and the types thereof can be the same or different; for another example, the description object is "information", and "first information" and "second information" can be the same information or different information, and the content thereof can be the same or different.

[0216] In some embodiments, "including A", "containing A", "for indicating A", and "carrying A" can be interpreted as directly carrying A, or indirectly indicating A.

[0217] In some embodiments, the terms "in response to", "in response to determining", "in the case of", "when", "if", "if" and the like can be replaced with each other.

[0218] In some embodiments, the terms "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", "above" and the like can be replaced with each other, and the terms "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "not more than", "lower than", "lower than or equal to", "not higher than", "below" and the like can be replaced with each other.

[0219] In some embodiments, the apparatus and the like can be interpreted as physical or virtual, and the name thereof is not limited to the name described in the embodiments. The terms "apparatus", "equipment", "IoT terminal device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject" and the like can be replaced with each other.

[0220] In some embodiments, "network" can be interpreted as an apparatus (for example, an access network device, a core network device, and the like) included in the network.

[0221] In some embodiments, the terms “access network device (AN IoT terminal device),” “radio access network device (RAN IoT terminal device),” “base station (BS),” “radio base station,” “fixed station,” “node,” “access point,” “transmission point (TP),” “reception point (RP),” “transmission / reception point (TRP),” “panel,” “antenna panel,” “antenna array,” “cell,” “macro cell,” “small cell,” “femto cell,” “pico cell,” “sector,” “cell group,” “carrier,” “component carrier,” “bandwidth part (BWP),” and the like can be replaced with each other.

[0222] In some embodiments, the terms "terminal," "terminal IoT device," "user equipment (UE)," "user terminal," "mobile station (MS)," "mobile terminal (MT)," "subscriber station," "mobile unit," "subscriber unit," "wireless unit," "remote unit," "mobile device," "wireless device," "wireless communication device," "remote device," "mobile subscriber station," "access terminal," "mobile terminal," "wireless terminal," "remote terminal," "handset," "user agent," "mobile client," "client," "Narrow Band Internet of Things (NB-IoT) device," and the like can be replaced with each other.

[0223] In some embodiments, the access network device, the core network device, or the network device can be replaced with a terminal. For example, the structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced with the communication between a plurality of terminals (for example, also referred to as device-to-device (IoT terminal device-to-IoT terminal device, D2D), vehicle-to-everything (V2X), and the like) can also apply the embodiments of the present disclosure. In this case, it can also be configured as a structure in which the terminal has all or part of the functions that the access network device has. Furthermore, the language of "uplink," "downlink," and the like can also be replaced with the language corresponding to the communication between terminals (for example, "side"). For example, the uplink channel, the downlink channel, and the like can be replaced with the side channel, and the uplink, the downlink, and the like can be replaced with the sidelink.

[0224] In some embodiments, the terminal can be replaced with the access network device, the core network device, or the network device. In this case, it can also be configured as a structure in which the access network device, the core network device, or the network device has all or part of the functions that the terminal has.

[0225] In some embodiments, the data, information, etc. can be obtained in compliance with the laws and regulations of the country where the location is situated.

[0226] In some embodiments, the data, information, etc. can be obtained after obtaining the consent of the user.

[0227] In some embodiments, the threshold mentioned in the embodiments can be a numerical value, a constant, or some fixed value, etc.

[0228] In addition, each element, each row, or each column in the table of the embodiments of the disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0229] The correspondence shown in each table in the disclosure can be configured or predefined. The values of the information in each table are only examples, and other values can be configured, and the disclosure is not limited. When configuring the correspondence between the information and each parameter, it is not necessarily required to configure all the correspondences shown in each table. For example, the correspondence shown in some rows in the table in the disclosure can not be configured. For another example, the above table can be appropriately deformed, adjusted, etc., such as splitting, merging, etc. The names of the parameters shown in the titles of the above tables can also use other names understandable by the communication device, and the values or representations of the parameters can also use other values or representations understandable by the communication device. The above tables can also use other data structures when implemented, such as arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, etc.

[0230] The predefinition in the disclosure can be understood as definition, predefinition, storage, pre-storage, pre-negotiation, pre-configuration, solidification, or pre-burning.

[0231] The communication method, communication device, and communication system provided by the disclosure will be described in detail below with reference to the accompanying drawings.

[0232] FIG. 2 shows a structure diagram of a communication system according to an embodiment of the disclosure. As shown in FIG. 2, the system architecture can include a terminal 11, a network device 12, and a UL-only TRP.

[0233] In some embodiments, the terminal 11 supports unified TCI state configuration.

[0234] In some embodiments, the terminal 11 is configured by the network device in a unified transmission configuration indication (unified TCI) manner.

[0235] In some examples, the terminal 11 can be a terminal device, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), or the like. The terminal 11 can also be a car with communication function, a smart car, a mobile phone, a wearable device, a tablet (Pad), a computer with wireless transceiver function, a virtual reality device, an augmented reality device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in smart city, a wireless terminal device in smart home, or the like. Embodiments of the present disclosure do not limit the specific technology and specific device form of the terminal 11.

[0236] In some embodiments, the network device 12 can be an entity for transmitting or receiving signals on the network side. For example, the network device can be a base station or a core network node or a server, and the like, and specifically can be a communication satellite, an evolved NodeB (eNB), a transmission reception point (TRP), a next generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a wireless fidelity (WiFi) system, and the like. Embodiments of the present disclosure do not limit the specific technology and specific device form of the network device. The network device provided by the embodiments of the present disclosure can be composed of a central unit (CU) and a distributed unit (DU), wherein the CU can also be referred to as a control unit (control unit). The CU-DU structure can split the protocol layers of the network device, for example, the base station, and the functions of part of the protocol layers are controlled by the CU, and the functions of the remaining part or all of the protocol layers are distributed in the DU and controlled by the CU.

[0237] It can be understood that the communication system described in the embodiments of the present disclosure is for more clearly illustrating the technical solutions of the embodiments of the present disclosure, and does not constitute a limitation on the technical solutions proposed by the embodiments of the present disclosure. Those skilled in the art can know that, with the evolution of system architecture and the appearance of new business scenarios, the technical solutions proposed by the embodiments of the present disclosure are also applicable to similar technical problems.

[0238] The following embodiments of the present disclosure can be applied to the communication system shown in FIG. 2, or part of the subject, but are not limited thereto. The subjects shown in FIG. 2 are illustrative, and the communication system can include all or part of the subjects in FIG. 2, or other subjects other than FIG. 2, the number and form of each subject is arbitrary, the connection relationship between each subject is illustrative, each subject can be connected or not connected, and the connection can be in any way, can be direct connection or indirect connection, can be wired connection or wireless connection.

[0239] Embodiments of the present disclosure can be applied to satellite communication, Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G NR, Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (Bluetooth (registered trademark)), Public Land Mobile Network (PLMN) network, device-to-device (IoT terminal-to-IoT terminal, D2D) system, Machine to Machine (M2M) system, Internet of Things (IoT) system, Vehicle-to-Everything (V2X), system using other communication methods, next-generation system expanded based thereon, and the like. Further, a plurality of systems can be applied in combination (for example, combination of LTE or LTE-A and 5G, and the like).

[0240] When the terminal performs uplink channel / signal transmission, uplink power control needs to be performed. Since only the macro gNB (network device) has a downlink loss reference signal (PL RS), and the UL-only TRP does not have a downlink signal, how to estimate the loss of the UL-only TRP is a problem to be solved. This problem can be solved by considering the PL offset parameter estimated relative to the macro gNB for the corresponding PL calculation for the UL-only TRP, to achieve the corresponding uplink power control. There are two types of solutions for the terminal to estimate the loss of the UL-only TRP:

[0241] Method 1:

[0242] Downlink loss estimation is performed based on the DL PL RS configuration, and the loss estimation value in the UL TRP direction is obtained through the PL offset configuration value associated with the TCI state pointing to the UL-only TRP, and is used for the transmission of the uplink channel / signal;

[0243] PL UL = PL DL - PL offset;

[0244] Method 2:

[0245] The initial value of the uplink loss PL UL is calculated through the PL offset in method 1, and the PL offset' that changes relative to PL UL is updated by sending SRS to the UL TRP, and the new PL UL is calculated by the following formula:

[0246] PL UL' = PL UL + PL offset';

[0247] In the UL-only scenario, a cell includes a macro gNB and multiple UL-only TRP receiving points. In order to support intra-cell downlink S-TRP / uplink M-TRP transmission, the base station needs to perform uplink / downlink beam management process and indicate the beam information used for data / signal transmission to the terminal, and the uplink M-TRP transmission is completed in cooperation between the macro gNB and the UL-only TRP multiple nodes.

[0248] When the terminal performs uplink channel / signal transmission, the DL PL RS configured by the network and the PL offset associated with the TCI state can be used to calculate the PL for the UL-only TRP direction transmission. How to update the PL offset is a technical problem to be solved.

[0249] To solve the above problems, by applying the scheme of the embodiments of the disclosure, for a terminal supporting unified TCI state configuration and configured by a network device as a unified transmission configuration indication mode, first information sent by the network device can be received, and the first configuration is updated according to the first information; wherein the first configuration is used to determine the PL offset corresponding to the UL-only TRP. Further, the PL offset corresponding to the UL-only TRP can be updated.

[0250] Further, in order to illustrate the specific execution process of the above communication system, FIG. 3 shows a schematic diagram of a communication method according to an embodiment of the disclosure. The method is applied to the above communication system, as shown in FIG. 3, and can include the following steps:

[0251] Step S201, the network device sends first information to the terminal.

[0252] In some embodiments, the terminal receives the first information sent by the network device.

[0253] In some embodiments, the terminal supports unified TCI state configuration. The terminal can be configured and used according to the characteristics of unified transmission configuration indication (unified TCI state) in the 3GPP new radio (NR) Release 17 (R17) standard, and supports DL S-TRP / UL S-TRP transmission.

[0254] In some embodiments, the terminal is configured by the network device as a unified transmission configuration indication (unified TCI) mode, and the indication of S-TRP in uplink and downlink, that is, the indication of TCI state in one direction. The network device configures the unified TCI state as a joint TCI state mode or a separate TCI state mode, wherein the TCI state configured in the joint TCI state mode can be used for uplink transmission and downlink transmission at the same time, and the separate TCI state mode corresponds to a DL TCI state configured for downlink transmission or a UL TCI state configured for uplink transmission, or a DL TCI state and a UL TCI state are configured independently at the same time. Wherein the joint TCI state and the DL TCI state share one TCI state configuration pool / set, and the UL TCI state configures one TCI state configuration pool / set.

[0255] In some embodiments, the cell includes one macro gNB and multiple UL-only TRP reception points, i.e., asymmetric multi-TRP transmission (downlink single-TRP / uplink multi-TRP), the terminal can be configured with the PL offset corresponding to the UL-only TRP by the downlink TRP, i.e., the macro gNB, when the terminal transmits the uplink channel / signal, the downlink path loss reference signal (DL PL RS) configured by the network and the configured PL offset can be used to calculate the path loss (PL) for the UL-only TRP direction transmission. When it is necessary to update the PL offset corresponding to the UL-only TRP, the network device can send the first information to the terminal to indicate the update of the PL offset parameter corresponding to the UL-only TRP.

[0256] In some embodiments, the first information includes related information indicating the unified TCI state supporting S-TRP transmission, such as whether to activate or deactivate, whether to update the corresponding PL offset parameter, and the like.

[0257] In some embodiments, the first information can be used to indicate the update of the PL offset parameter corresponding to the UL-only TRP, and the first information can include at least one of the following:

[0258] Radio Resource Control (RRC) signaling, Downlink Control Information (DCI), Media Access Control (MAC) control element (CE), Master Information Block (MIB), System Information Block (SIB), and the like.

[0259] Step S202, the terminal updates the first configuration according to the first information.

[0260] In some embodiments, the first configuration can be used to determine the PL offset corresponding to the UL-only TRP. The first configuration can include the PL offset parameter corresponding to the UL-only TRP, and the terminal can update the first configuration according to the first information, and then update the PL offset corresponding to the UL-only TRP.

[0261] In some embodiments, at least one of the following A1 to A6 includes the first configuration:

[0262] A1, a first joint TCI state, the first joint TCI state is configured by radio resource control (RRC) signaling, such as the joint TCI state configured by RRC signaling of the network device, which can be a joint TCI state list, which can contain all configured joint TCI states, such as up to 128 configured joint TCI states. The RRC signaling configured joint TCI state can include a first configuration, i.e., the UL-only TRP corresponds to the initially configured PL offset parameter. In some examples, the network device can indicate to update the PL offset parameter in the RRC configured joint TCI state through the first information, which can be applied to the uplink loss estimation for the UL-only TRP.

[0263] A2, a first UL TCI state, the first UL TCI state is configured by RRC signaling, such as the UL TCI state configured by RRC signaling of the network device, which can be a UL TCI state list, which can contain all configured UL TCI states, such as up to 64 configured UL TCI states. The RRC configured UL TCI state can include a first configuration, i.e., the UL-only TRP corresponds to the initially configured PL offset parameter. In some examples, the network device can indicate to update the PL offset parameter in the RRC configured joint TCI state through the first information, which can be applied to the uplink loss estimation for the UL-only TRP.

[0264] A3, a second joint TCI state, the second joint TCI state is activated by MAC CE indication, such as the network device sending a MAC CE to the terminal, and then activating the joint TCI state from the RRC configured joint TCI state list through the MAC CE, such as up to 8 activated, the activated joint TCI state can include a first configuration, i.e., the PL offset parameter corresponding to the UL-only TRP. In some examples, the network device can indicate to update the PL offset parameter in the activated joint TCI state through the first information, which can be applied to the uplink loss estimation for the UL-only TRP.

[0265] A4, a second UL TCI state, the second UL TCI state is activated by MAC CE indication, such as the network device sends MAC CE to the terminal, and then indicates the activation of the UL TCI state from the UL TCI state list configured by RRC through the MAC CE, such as a maximum of 8 can be activated, and the activated UL TCI state can include the first configuration, that is, the PL offset parameter corresponding to the UL-only TRP. In some examples, the network device can indicate the update of the PL offset parameter in the activated UL TCI state through the first information, and the PL offset parameter can be applied to the uplink loss estimation for the UL-only TRP.

[0266] A5, a third joint TCI state, the third joint TCI state is applied by downlink control information (DCI) indication, or applied by DCI and RRC signaling indication together, for example, the network device sends DCI to the terminal, and further indicates the currently applied joint TCI state from the activated joint TCI state; or the network device indicates the currently applied joint TCI state through DCI and RRC signaling together, such as different channels / signals indicate the application of the joint TCI state method, the physical downlink shared channel (PDSCH) / dynamic grant (DG) physical uplink shared channel (PUSCH) can be indicated by DCI, and the sounding reference signal (SRS) or type 1 configured grant (CG) PUSCH / physical uplink control channel (PUCCH) can be configured by RRC signaling to apply part / all of the joint TCI state in the joint TCI state indicated by DCI. The currently applied joint TCI state can include the first configuration, that is, the PL offset parameter corresponding to the UL-only TRP. In some examples, the network device can indicate the update of the PL offset parameter in the currently applied joint TCI state through the first information, and the PL offset parameter can be applied to the uplink loss estimation for the UL-only TRP.

[0267] A6, a third UL TCI state, which is indicated by DCI or jointly indicated by DCI and RRC signaling, for example, the network device sends DCI to the terminal, and the currently applied UL TCI state can be further indicated from the activated UL TCI state; or the network device jointly indicates the currently applied UL TCI state through DCI and RRC signaling, for example, different channels / signals indicate the application of the UL TCI state in different ways, PDSCH / DGPUSCH can be indicated by DCI, and SRS or type 1 CG PUSCH / PUCCH can be configured by RRC signaling to apply part / all of the UL TCI state indicated by DCI. The currently applied UL TCI state can include the first configuration, that is, the PL offset parameter corresponding to the UL-only TRP. In some examples, the network device can indicate the update of the PL offset parameter in the currently applied UL TCI state through the first information, and the PL offset parameter can be applied to the uplink loss estimation for the UL-only TRP.

[0268] The update of the PL offset in the present embodiment can be applied to at least one of A1 to A6 described above.

[0269] In some embodiments, the first information includes a first MAC CE, which can be a newly designed MAC CE. The network device can send the first MAC CE to the terminal, and then indicate the update of the PL offset corresponding to the UL-only TRP through the first MAC CE.

[0270] In some embodiments, the indication field in the first MAC CE can be used to indicate the updated value of the PL offset corresponding to the UL-only TRP.

[0271] In some embodiments, the number of bits used in the indication field of the first MAC CE can be determined according to the indication range and the indication step of the PL offset. For example, the indication range of the PL offset corresponding to the UL-only TRP can be [-A, B], for example, the PL offset can be positive or negative, the minimum value can be -A dB, and the maximum value can be B dB, and the values of A and B can be set according to actual conditions. The indication step of the PL offset can be the indication granularity of the PL offset.

[0272] In some examples, the indication step of the PL offset includes one of the following:

[0273] 1 dB; 2 dB; 4 dB.

[0274] There can be various ways to indicate the updated value of the PL offset through the indication field in the first MAC CE, taking the example that the indication step of the PL offset is 4dB, including but not limited to the following ways B1 to B3:

[0275] B1, at least 5 bits of the indication field in the first MAC CE are used to indicate the numerical value (or can be referred to as actual value, etc.) of the updated value of the PL offset, for example, in the first MAC CE, at least 5 bits of the indication field are used to indicate what the numerical value of the updated value of the PL offset corresponding to the UL-only TRP is.

[0276] B2, 1 bit of the indication field in the first MAC CE is used to indicate the positive or negative value of the updated value of the PL offset, and the LSB 4 bits of the indication field are used to indicate the absolute value of the updated value of the PL offset, for example, in the first MAC CE, 1 bit of the indication field is used to indicate the positive or negative value of the updated value of the PL offset, such as 1 for positive value and 0 for negative value, or 1 for negative value and 0 for positive value. On the basis of indicating the positive or negative value of the updated value through the 1-bit indication field, the LSB 4 bits of the indication field can be used to further indicate the absolute value of the updated value of the PL offset, and then the numerical value of the updated value of the PL offset can be obtained through the positive or negative value and the absolute value.

[0277] B3, at least 5 bits of the indication field in the first MAC CE are used to indicate the numerical value of the updated value of the PL offset, and the MSB indication field is used to indicate the positive or negative value of the updated value of the PL offset, and the LSB indication field is used to indicate the absolute value of the updated value of the PL offset, for example, in the first MAC CE, at least 5 bits of the indication field can be used to indicate the numerical value of the updated value of the PL offset, and the MSB indication field can be used to indicate the positive or negative value of the updated value of the PL offset, and the LSB indication field can be used to indicate the absolute value of the updated value of the PL offset.

[0278] In some embodiments, more bits can be used to support the indication design of smaller step size, such as 1dB or 2dB, etc.

[0279] In some embodiments, the first MAC CE has at least one first indication field, which can be used to indicate whether the TCI state corresponding to different TCI codepoints needs to be updated with PL offset. For example, in the newly designed first MAC CE, Fi indication field is defined to indicate whether the joint TCI state or UL TCI state corresponding to the ith TCI codepoint needs to be updated with PL offset. 1 means update, 0 means no update; or 1 means no update, 0 means update.

[0280] In some embodiments, the signaling length of the first MAC CE is determined by the first indication field, and the first indication field is determined by one of the following:

[0281] The first number, which is used to represent the number of TCI state codepoints;

[0282] The second number, which is used to represent the number of joint TCI states corresponding to the TCI state codepoint that need to be updated with PL offset;

[0283] The third number, which is used to represent the number of UL TCI states corresponding to the TCI state codepoint that need to be updated with PL offset.

[0284] In some examples, the signaling length of the first MAC CE is variable, and the supported indication length can be determined by the first indication field. For example, when 2 TCI codepoints corresponding joint / UL TCI states need to be updated with PL offset, 2 bits in 1 byte of the first indication field can be used to indicate that the 2 joint / UL TCI states need to be updated with PL offset, and 1 or 2 bytes can be used to indicate the update values of the 2 PL offsets; when 10 TCI codepoints corresponding TCI states need to be updated with PL offset, 10 bits in 2 bytes of the first indication field can be used to indicate that the 10 TCI states need to be updated with PL offset, and 5 or 10 bytes can be used to indicate the update values of the 10 PL offsets.

[0285] In some examples, the signaling length of the first MAC CE is a fixed length, for example, 4 or 8 bytes are fixedly used to indicate the PL offset update values corresponding to the 8 joint / UL TCI states for each TCI state codepoint pair.

[0286] In some embodiments, the first indication field is a first value for determining that the TCI codepoint contains a joint TCI state or an UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated, the first value being one of 0 and 1.

[0287] In some embodiments, the first indication field is a second value for determining that the TCI codepoint does not contain a joint TCI state and an UL TCI state, the second value being one of 0 and 1, and the first value being different from the second value.

[0288] In some embodiments, the first indication field is a second value for determining that the TCI codepoint contains a joint TCI state or an UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated, the second value being one of 0 and 1, and the first value being different from the second value.

[0289] In some examples, the first indication field is a first value for determining that the TCI codepoint contains a joint / UL TCI state and the corresponding PL offset needs to be updated, and the first indication field is a second value for determining that the TCI codepoint does not contain a joint / UL TCI state, or the TCI codepoint contains a joint / UL TCI state and the corresponding PL offset does not need to be updated, wherein the first value and the second value are one of 0 and 1, and the first value is different from the second value. For example, the first indication field is 1 for determining that the TCI codepoint contains a joint / UL TCI state and the corresponding PL offset needs to be updated, and the first indication field is 0 for determining that the TCI codepoint does not contain a joint / UL TCI state, or the TCI codepoint contains a joint / UL TCI state and the corresponding PL offset does not need to be updated.

[0290] In some embodiments, the first MAC CE has at least one second indication field, and the second indication field can be used to indicate that the PL offset update value corresponding to the TCI state is a positive value or a negative value. For example, in the newly designed first MAC CE, a P / N indication field is defined to indicate that the PL offset update value corresponding to the TCI state to be updated is a positive value or a negative value.

[0291] In some embodiments, taking updating the PL offset parameter in the activated joint TCI state or UL TCI state as an example, the indication field corresponding to the PL offset update value in the first MAC CE can include at least one of the following C1 to C5:

[0292] C1, 1-bit second indication field, 3 reserved bits, and 4-bit indication field, the 4-bit indication field is used to indicate the absolute value of the PL offset update value.

[0293] In some examples, a new MAC CE, i.e., a first MAC CE, as shown in FIG. 4, can be designed based on the unified TCI state MAC CE (as shown in FIG. 1), on the basis of the unified TCI state MAC CE, a Fi indication field is defined for indicating whether the joint TCI state or UL TCI state corresponding to the i-th TCI codepoint needs PL offset update, and a 1-bit P / N indication field is defined for indicating whether the PL offset update value corresponding to the TCI state that needs to be updated is a positive value or a negative value. In FIG. 4, F1 to F8 are used to indicate whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs PL offset update, 1 indicates that there is an update value, and 0 indicates that there is no update or indicates that the TCI state corresponds to a DL TRP. The following MAC CE indication bytes respectively indicate the PL offset value of the joint / UL TCI state that needs to update the PL offset and the corresponding joint / UL TCI state. If a certain TCI state needs PL offset update, the corresponding update value is found through the TCI state, a 1-bit P / N indication field is used to indicate whether the PL offset update value is a positive value or a negative value, 1 indicates a positive value, and 0 indicates a negative value, then there are 3 reserved bits R in the middle, and finally there are 4-bit indication fields for indicating the absolute value of the PL offset update value. Among them, the 1-bit D / U can not exist in the newly designed first MAC CE, or it can be replaced by 1 reserved bit R, etc. OCT2 is optional, and can also not exist. When the byte corresponding to OCT2 is default, the UL BWP can be the same BWP as the DL BWP in OCT1.

[0294] In some examples, a new MAC CE, i.e., a first MAC CE, can be designed based on the unified TCI state MAC CE (as shown in FIG. 1), as shown in FIG. 5. On the basis of the unified TCI state MAC CE, a Fi indication field is defined to indicate whether the joint TCI state or UL TCI state corresponding to the i-th TCI codepoint needs a PL offset update, and a 1-bit P / N indication field is defined to indicate whether the PL offset update value corresponding to the TCI state that needs to be updated is positive or negative. In FIG. 5, F1 to F8 are used to indicate whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs a PL offset update, where 1 indicates that there is an update value, and 0 indicates that there is no update or indicates that the TCI state corresponds to a DL TRP. One method is that the MAC-CE indication bytes in the back respectively indicate the PL offset value of the joint / UL TCI state that needs to update the PL offset and the corresponding joint / UL TCI state, and the first N bytes are used for the indication of all joint / UL TCI states. The indication byte corresponding to the PL offset update value of each joint / UL TCI state is indicated by M after the joint / UL TCI state byte, and the order of each PL offset update value and joint / UL TCI state is one-to-one correspondence, i.e., M is equal to N. Another indication method is that the MAC-CE indication bytes in the back respectively indicate the joint / UL TCI state activated by the MAC-CE and the PL offset value of the joint / UL TCI state that needs to update the PL offset. If a certain TCI state needs a PL offset update through the Fi indication field, the actual PL offset update value corresponding to the joint / UL TCI state ID can be determined according to the update order corresponding to the Fi indication field. There can be M PL offset update values, where M is less than or equal to N. A 1-bit P / N indication field is used to indicate whether the PL offset update value is positive or negative, where 1 is positive and 0 is negative. Then, 3 reserved bits R are in the middle, and finally, a 4-bit indication field is used to indicate the absolute value of the PL offset update value. The 1-bit D / U can not exist in the newly designed first MAC CE, or it can be replaced by 1 reserved bit R, etc. OCT2 is optional and can not exist. When the byte corresponding to OCT2 is default, the UL BWP can be the same BWP as the DL BWP in OCT1.

[0295] In some examples, a new MAC CE, i.e., a first MAC CE, as shown in FIG. 6, is designed instead of the unified TCI state MAC CE (as shown in FIG. 1), and the Pi indication field is redefined to indicate whether the joint TCI state or UL TCI state corresponding to the ith TCI codepoint needs a PL offset update. The Pi indication field corresponds to 8 TCI codepoints activated by the MAC CE. If the ith TCI codepoint contains a joint / UL TCI state and the corresponding PL offset needs to be updated, the Pi indication field is indicated as 1; when the ith TCI codepoint does not contain a joint / UL TCI state or the ith TCI codepoint contains a joint / UL TCI state and the corresponding PL offset does not need to be updated, the Pi indication field is indicated as 0; the following MAC CE indication bytes indicate the PL offset value of the joint / UL TCI state that needs to be updated. In FIG. 6, P1 to P8 indicate whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs a PL offset update, 1 indicates that there is an update value, and 0 indicates that there is no update or indicates that the TCI state corresponds to a DL TRP. If a certain TCI state needs a PL offset update, find the indication field for indicating the update value, indicate whether the PL offset update value is positive or negative through the 1-bit P / N indication field, 1 indicates positive, and 0 indicates negative, then the middle is 3 reserved bits R, and finally the 4-bit indication field is used to indicate the absolute value of the PL offset update value.

[0296] C2, 3 reserved bits, and a 5-bit indication field for indicating the numerical value of the PL offset update value.

[0297] In some examples, a new MAC CE, i.e., a first MAC CE, as shown in FIG. 7, can be designed based on the unified TCI state MAC CE (as shown in FIG. 1), and on the basis of the unified TCI state MAC CE, a Fi indication field is defined for indicating whether the joint TCI state or UL TCI state corresponding to the i-th TCI codepoint needs a PL offset update. In FIG. 7, whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs a PL offset update is indicated by F1 to F8, where 1 indicates that there is an update value, and 0 indicates that there is no update or indicates that the TCI state corresponds to a DL TRP. The subsequent MAC CE indication bytes respectively indicate the PL offset value of the joint / UL TCI state that needs to be updated and the corresponding joint / UL TCI state. If a certain TCI state needs a PL offset update, the corresponding update value is found through the TCI state, which is first 3 reserved bits R, and then 5-bit indication field for indicating the numerical value of the PL offset update value. Among them, 1-bit D / U can also not exist in the newly designed MAC CE, or be replaced by 1 reserved bit R, etc. OCT2 is optional, and can also not exist. When the OCT2 corresponding byte is default, the UL BWP can be the same BWP as the DL BWP in OCT1.

[0298] In some examples, a new MAC CE, i.e., the first MAC CE, as shown in FIG. 8, can be designed based on the unified TCI state MAC CE (as shown in FIG. 1), and on the basis of the unified TCI state MAC CE, a Fi indication field is defined to indicate whether the joint TCI state or UL TCI state corresponding to the i-th TCI codepoint needs PL offset update, and a 1-bit P / N indication field is defined to indicate whether the PL offset update value corresponding to the TCI state that needs to be updated is a positive value or a negative value. In FIG. 8, F1 to F8 are used to indicate whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs PL offset update, where 1 indicates that there is an update value, and 0 indicates that there is no update or indicates that the TCI state corresponds to a DL TRP. One method is that the MAC-CE indication bytes in the back respectively indicate the PL offset value of the joint / UL TCI state that needs to update the PL offset and the corresponding joint / UL TCI state, and the first N bytes are used to indicate all joint / UL TCI states, and the indication bytes corresponding to the PL offset update value of each joint / UL TCI state are indicated by M in the joint / UL TCI state bytes, and the order of each PL offset update value and joint / UL TCI state is one-to-one, i.e., M is equal to N. Another indication method is that the MAC-CE indication bytes in the back respectively indicate the joint / UL TCI state activated by the MAC-CE and the PL offset value of the joint / UL TCI state that needs to update the PL offset. If a certain TCI state needs PL offset update through the Fi indication field, the actual PL offset update value of the joint / UL TCI state ID corresponding to the TCI state can be determined according to the update order corresponding to the Fi indication field, and there can be M PL offset update values, where M is less than or equal to N, followed by 3 reserved bits R, and then 5-bit indication field is used to indicate the numerical value of the PL offset update value. Among them, the 1-bit D / U can not exist in the newly designed first MAC CE, or it can be replaced by 1 reserved bit R, etc. OCT2 is optional, and can also not exist. When the byte corresponding to OCT2 is default, the UL BWP can be the same BWP as the DL BWP in OCT1.

[0299] In some examples, a new MAC CE, i.e., a first MAC CE, as shown in FIG. 9, can be designed instead of the unified TCI state MAC CE (as shown in FIG. 1), and the Pi indication field is redefined to indicate whether the joint TCI state or UL TCI state corresponding to the ith TCI codepoint needs a PL offset update. The Pi indication field corresponds to 8 TCI codepoints activated by the MAC CE. If the ith TCI codepoint contains a joint / UL TCI state and the corresponding PL offset needs to be updated, the Pi indication field is indicated as 1; when the ith TCI codepoint does not contain a joint / UL TCI state or the ith TCI codepoint contains a joint / UL TCI state and the corresponding PL offset does not need to be updated, the Pi indication field is indicated as 0; the following MAC CE indication bytes indicate the PL offset value of the joint / UL TCI state that needs to be updated. In FIG. 9, P1 to P8 indicate whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs a PL offset update, 1 for corresponding update value, 0 for no update or indicating that the TCI state corresponds to a DL TRP. If a certain TCI state needs a PL offset update, find the indication field for indicating the update value, first 3 reserved bits R, then 5-bit indication field for indicating the numerical value of the PL offset update value.

[0300] C3, 1-bit second indication field and 7-bit indication field for indicating the numerical value of the PL offset update value.

[0301] In some examples, a new MAC CE, i.e., a first MAC CE, as shown in FIG. 10, can be designed based on the unified TCI state MAC CE (as shown in FIG. 1), on the basis of the unified TCI state MAC CE, a Fi indication field is defined for indicating whether the joint TCI state or UL TCI state corresponding to the i-th TCI codepoint needs PL offset update, and a 1-bit P / N indication field is defined for indicating whether the PL offset update value corresponding to the TCI state that needs to be updated is a positive value or a negative value. In FIG. 10, F1 to F8 are used to indicate whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs PL offset update, 1 indicates that there is an update value, and 0 indicates that there is no update or indicates that the TCI state corresponds to a DL TRP. The subsequent MAC CE indication bytes respectively indicate the PL offset value of the joint / UL TCI state that needs to update the PL offset and the corresponding joint / UL TCI state. If a certain TCI state needs PL offset update, the corresponding update value is found through the TCI state, a 1-bit P / N indication field is used to indicate whether the PL offset update value is a positive value or a negative value, 1 indicates a positive value, and 0 indicates a negative value, and then a 7-bit indication field is used to indicate the numerical value of the PL offset update value. In this way, a lower indication step can also be supported. The 1-bit D / U can also not exist in the newly designed MAC CE, or it can be replaced by a 1-bit reserved bit R, etc. OCT2 is optional and can also not exist. When the byte corresponding to OCT2 is default, the UL BWP can be the same BWP as the DL BWP in OCT1.

[0302] In some examples, a new MAC CE, i.e., the first MAC CE, can be designed based on the unified TCI state MAC CE (as shown in FIG. 1), as shown in FIG. 11. On the basis of the unified TCI state MAC CE, a Fi indication field is defined to indicate whether the joint TCI state or UL TCI state corresponding to the i-th TCI codepoint needs a PL offset update, and a 1-bit P / N indication field is defined to indicate whether the PL offset update value corresponding to the TCI state that needs to be updated is positive or negative. In FIG. 11, F1 to F8 are used to indicate whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs a PL offset update, where 1 indicates that there is an update value, and 0 indicates that no update is needed or indicates that the TCI state corresponds to a DL TRP. One method is that the MAC-CE indication bytes in the back respectively indicate the PL offset value of the joint / UL TCI state that needs to update the PL offset and the corresponding joint / UL TCI state, and the first N bytes are used for the indication of all joint / UL TCI states. The indication byte corresponding to the PL offset update value of each joint / UL TCI state is indicated by M in the back of the joint / UL TCI state byte, and the order of each PL offset update value and joint / UL TCI state is one-to-one correspondence, i.e., M is equal to N. Another indication method is that the MAC-CE indication bytes in the back respectively indicate the joint / UL TCI state activated by the MAC-CE and the PL offset value of the joint / UL TCI state that needs to update the PL offset. If a certain TCI state needs a PL offset update through the Fi indication field, the actual PL offset update value corresponding to the joint / UL TCI state ID can be determined according to the update order corresponding to the Fi indication field. There can be M PL offset update values, where M is less than or equal to N. A 1-bit P / N indication field is used to indicate whether the PL offset update value is positive or negative, where 1 is positive and 0 is negative. Then, a 7-bit indication field is used to indicate the numerical value of the PL offset update value. The 1-bit D / U can also not exist in the newly designed first MAC CE, or it can be replaced by a 1-bit reserved bit R, etc. OCT2 is optional and can also not exist. When the byte corresponding to OCT2 is default, the UL BWP can be the same BWP as the DL BWP in OCT1.

[0303] In some examples, a new MAC CE, i.e., a first MAC CE, as shown in FIG. 12, is designed instead of the unified TCI state MAC CE (as shown in FIG. 1), and the Pi indication field is redefined to indicate whether the joint TCI state or UL TCI state corresponding to the ith TCI codepoint needs a PL offset update. The Pi indication field corresponds to 8 TCI codepoints activated by the MAC CE. If the ith TCI codepoint contains a joint / UL TCI state and the corresponding PL offset needs to be updated, the Pi indication field is indicated as 1; when the ith TCI codepoint does not contain a joint / UL TCI state or the ith TCI codepoint contains a joint / UL TCI state and the corresponding PL offset does not need to be updated, the Pi indication field is indicated as 0; the following MAC CE indication bytes indicate the PL offset value of the joint / UL TCI state that needs to be updated. In FIG. 12, P1 to P8 are used to indicate whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs a PL offset update, 1 indicates that there is an update value, and 0 indicates that there is no update or indicates that the TCI state corresponds to a DL TRP. If a certain TCI state needs a PL offset update, find the indication field used to indicate the update value, and use the 1-bit P / N indication field to indicate whether the PL offset update value is positive or negative, 1 for positive and 0 for negative, and then a 7-bit indication field is used to indicate the numerical value of the PL offset update value. In this way, a lower indication step can also be supported.

[0304] C4, an 8-bit indication field, is used to indicate the numerical value of the PL offset update value.

[0305] In some examples, a new MAC CE, i.e., a first MAC CE, can be designed based on the unified TCI state MAC CE (as shown in FIG. 1), as shown in FIG. 13. On the basis of the unified TCI state MAC CE, a Fi indication field is defined for indicating whether the joint TCI state or UL TCI state corresponding to the i-th TCI codepoint needs a PL offset update. In FIG. 13, whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs a PL offset update is indicated by F1 to F8, where 1 indicates that there is an update value, and 0 indicates that there is no update or indicates that the TCI state corresponds to a DL TRP. The subsequent MAC CE indication bytes respectively indicate the PL offset value of the joint / UL TCI state that needs a PL offset update and the corresponding joint / UL TCI state. If a certain TCI state needs a PL offset update, the corresponding update value is found through the TCI state, and an 8-bit indication field is used to indicate the numerical value of the PL offset update value. In this way, a lower indication step can also be supported. In the newly designed MAC CE, the 1-bit D / U can also be absent, or can be replaced by a 1-bit reserved bit R, etc. OCT2 is optional and can also be absent. When the OCT2 corresponding byte is in the default state, the UL BWP can be the same BWP as the DL BWP in OCT1.

[0306] In some examples, a new MAC CE, i.e., a first MAC CE, can be designed based on the unified TCI state MAC CE (as shown in FIG. 1), as shown in FIG. 14. On the basis of the unified TCI state MAC CE, a Fi indication field is defined to indicate whether the joint TCI state or UL TCI state corresponding to the i-th TCI codepoint needs a PL offset update, and a 1-bit P / N indication field is defined to indicate whether the PL offset update value corresponding to the TCI state that needs to be updated is a positive value or a negative value. In FIG. 14, F1 to F8 are used to indicate whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs a PL offset update, where 1 indicates that there is an update value, and 0 indicates that there is no update or indicates that the TCI state corresponds to a DL TRP. One method is that the MAC-CE indication bytes in the back respectively indicate the PL offset value of the joint / UL TCI state that needs to update the PL offset and the corresponding joint / UL TCI state, and the first N bytes are used to indicate all joint / UL TCI states. The indication byte corresponding to the PL offset update value of each joint / UL TCI state is indicated by M in the joint / UL TCI state byte, and the order of each PL offset update value and joint / UL TCI state is one-to-one correspondence, i.e., M is equal to N. Another indication method is that the MAC-CE indication bytes in the back respectively indicate the joint / UL TCI state activated by the MAC-CE and the PL offset value of the joint / UL TCI state that needs to update the PL offset. If a certain TCI state needs a PL offset update through the Fi indication field, the actual PL offset update value of the joint / UL TCI state ID corresponding to the TCI state can be determined according to the update order corresponding to the Fi indication field. There can be M PL offset update values, where M is less than or equal to N, and an 8-bit indication field is used to indicate the numerical value of the PL offset update value. The 1-bit D / U can also not exist in the newly designed first MAC CE, or it can be replaced by a 1-bit reserved bit R, etc. OCT2 is optional and can also not exist. When the byte corresponding to OCT2 is not present by default, the UL BWP can be the same BWP as the DL BWP in OCT1.

[0307] In some examples, a new MAC CE, i.e., a first MAC CE, as shown in FIG. 15, can be designed instead of the unified TCI state MAC CE (as shown in FIG. 1), and the Pi indication field is redefined to indicate whether the joint TCI state or UL TCI state corresponding to the ith TCI codepoint needs a PL offset update. The Pi indication field corresponds to 8 TCI codepoints activated by the MAC CE. If the ith TCI codepoint contains a joint / UL TCI state and the corresponding PL offset needs to be updated, the Pi indication field is indicated as 1; when the ith TCI codepoint does not contain a joint / UL TCI state or the ith TCI codepoint contains a joint / UL TCI state and the corresponding PL offset does not need to be updated, the Pi indication field is indicated as 0; the following MAC CE indication bytes indicate the PL offset value of the joint / UL TCI state that needs to be updated. In FIG. 15, P1 to P8 are used to indicate whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs a PL offset update, 1 indicates that there is an update value, 0 indicates that there is no update or indicates that the TCI state corresponds to a DL TRP. If a certain TCI state needs a PL offset update, find the indication field used to indicate the update value, and the 8-bit indication field is used to indicate the numerical value of the PL offset update value. In this way, a lower indication step can also be supported.

[0308] C5, 4-bit indication field, which is used to indicate the absolute value of the PL offset update value.

[0309] In some examples, as shown in FIG. 16, redefine the Pi indication field to indicate whether the joint TCI state or UL TCI state corresponding to the ith TCI codepoint needs PL offset update. Define the P / Ni indication field to indicate whether the PL offset update value corresponding to the ith TCI state that needs to be updated is a positive value or a negative value. In FIG. 16, P1 to P8 are used to indicate whether the joint TCI state or UL TCI state corresponding to each TCI codepoint needs PL offset update, 1 indicates that there is an update value, 0 indicates that there is no update or indicates that the TCI state corresponds to a DL TRP. P / N1 to P / N8 are used to indicate whether the PL offset update value corresponding to each TCI state that needs to be updated is a positive value or a negative value, 1 indicates a positive value, and 0 indicates a negative value. If a certain TCI state needs PL offset update, find the corresponding P / N indication field to indicate whether the PL offset update value is a positive value or a negative value, and find the corresponding 4-bit indication field to indicate the absolute value of the PL offset update value. In this way, one byte can exist two absolute values of the PL offset update value, thereby saving indication space.

[0310] In some embodiments, for the PL offset update in the RRC configured joint TCI state or UL TCI state, a newly designed first MAC CE can also be used to indicate the update, such as because there are more joint TCI states or UL TCI states, for joint TCI states, up to 128 TCI codepoints can be configured, and for UL TCI states, up to 64 codepoints can be configured, so more bytes of indication field can be used to indicate the PL offset update.

[0311] In some examples, for the case of being configured as a joint TCI state mode, the joint TCI state corresponding to the maximum supported 128 TCI codepoints can be indicated by a first indication field of 16 bytes to indicate whether the PL offset corresponding to each joint TCI state needs to be updated, and up to 128 bytes can be used to indicate the update value of each PL offset. The specific implementation of indicating the update value of the PL offset can refer to at least one of the above C1 to C5, which will not be described here.

[0312] In some examples, for the case of being configured as the independent TCI state mode, up to 64 UL TCI states corresponding to TCI codepoints are supported, whether each UL TCI state corresponding PL offset needs to be updated can be indicated by 8 bytes of the first indication field, and up to 64 bytes can be used to indicate the updated value of each PL offset. The specific implementation of indicating the updated value of the PL offset can refer to at least one of C1 to C5 described above, and will not be described here.

[0313] In some embodiments, for the PL offset update in the currently applied joint TCI state or UL TCI state, a newly designed first MAC CE can also be used to indicate the update, such as using fewer bytes of the indication field to indicate the PL offset update.

[0314] In some examples, 1 byte can be used to indicate whether the PL offset in the currently applied joint TCI state or UL TCI state needs to be updated, and the specific implementation of indicating the updated value of the PL offset can refer to at least one of C1 to C5 described above, and will not be described here.

[0315] The communication method related to the embodiments of the present disclosure can include at least one of steps S201 to S202. For example, step S201 can be implemented as an independent embodiment, and step S202 can be implemented as an independent embodiment. In addition, part or all of the contents of steps S201 to S202 can be combined to implement an independent embodiment, and the present embodiment does not limit this.

[0316] By applying the scheme of the embodiments of the present disclosure, for a terminal supporting unified TCI state configuration and being configured by a network device as a unified transmission configuration indication mode, the first information sent by the network device can be received, and the first configuration is updated according to the first information; wherein the first configuration is used to determine the PL offset corresponding to the UL-only TRP. Further, the PL offset corresponding to the UL-only TRP can be updated.

[0317] In order to illustrate the specific execution process of the terminal, FIG. 17 shows a flow diagram of a communication method according to an embodiment of the present disclosure. Applied to the terminal side execution, it can include the following steps.

[0318] Step S301, the terminal receives the first information sent by the network device.

[0319] In some embodiments, the terminal supports unified TCI state configuration.

[0320] In some embodiments, the terminal is configured by the network device in a unified transmission configuration indication manner.

[0321] In some embodiments, the first information includes related information indicating a unified TCI state supporting S-TRP transmission.

[0322] Step S302, the terminal updates the first configuration according to the first information.

[0323] In some embodiments, the first configuration is used to determine the PL offset corresponding to the UL-only TRP.

[0324] In some embodiments, at least one of the following includes the first configuration:

[0325] a first joint TCI state, the first joint TCI state being configured by RRC signaling;

[0326] a first UL TCI state, the first UL TCI state being configured by RRC signaling;

[0327] a second joint TCI state, the second joint TCI state being activated by MAC CE indication;

[0328] a second UL TCI state, the second UL TCI state being activated by MAC CE indication;

[0329] a third joint TCI state, the third joint TCI state being applied by DCI indication, or being applied by DCI and RRC signaling jointly;

[0330] a third UL TCI state, the third UL TCI state being applied by DCI indication, or being applied by DCI and RRC signaling jointly.

[0331] In some embodiments, the first information can include a first MAC CE.

[0332] In some embodiments, an indication field in the first MAC CE can be used to indicate the updated value of the PL offset.

[0333] In some embodiments, the number of bits used in the indication field of the first MAC CE is determined according to the indication range and the indication step of the PL offset.

[0334] In some embodiments, the indication step of the PL offset comprises one of:

[0335] 1 dB; 2 dB; 4 dB.

[0336] In some embodiments, taking the indication step of the PL offset as 4 dB for example, at least 5 bits of the indication field in the first MAC CE are used to indicate the numerical value of the updated value of the PL offset.

[0337] In some embodiments, taking the indication step of the PL offset as 4 dB for example, 1 bit of the indication field in the first MAC CE is used to indicate the positive or negative value of the updated value of the PL offset, and the LSB 4 bits are used to indicate the absolute value of the updated value of the PL offset.

[0338] In some embodiments, taking the indication step of the PL offset as 4 dB for example, at least 5 bits of the indication field in the first MAC CE are used to indicate the numerical value of the updated value of the PL offset, and the MSB indication field is used to indicate the positive or negative value of the updated value of the PL offset, and the LSB indication field is used to indicate the absolute value of the updated value of the PL offset.

[0339] In some embodiments, the first MAC CE has at least one first indication field, and the first indication field is used to indicate whether the TCI state corresponding to the TCI codepoint is updated with the PL offset.

[0340] In some embodiments, the signaling length of the first MAC CE is determined by the first indication field, and the first indication field is determined by one of:

[0341] a first number, the first number being used to represent the number of TCI state codepoints;

[0342] a second number, the second number being used to represent the number of joint TCI states corresponding to the TCI state codepoint and needing to update the PL offset;

[0343] a third number, the third number being used to represent the number of UL TCI states corresponding to the TCI state codepoint and needing to update the PL offset.

[0344] In some embodiments, the first indication field is a first value for determining that the TCI codepoint contains a joint TCI state or an UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated;

[0345] The first indication field is a second value for determining that the TCI codepoint does not contain a joint TCI state and an UL TCI state; or,

[0346] The first indication field is a second value for determining that the TCI codepoint contains a joint TCI state or an UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated.

[0347] The first value and the second value are one of 0 and 1, and the first value is different from the second value.

[0348] In some embodiments, the first MAC CE has at least one second indication field, and the second indication field is used to indicate that the updated value of the PL offset corresponding to the TCI state is a positive value or a negative value.

[0349] In some examples, the indication field corresponding to the updated value of the PL offset in the first MAC CE includes at least one of the following:

[0350] 1 bit of the second indication field, 3 reserved bits, and a 4-bit indication field, the 4-bit indication field being used to indicate the absolute value of the updated value;

[0351] 3 reserved bits and a 5-bit indication field, the 5-bit indication field being used to indicate the numerical value of the updated value;

[0352] 1 bit of the second indication field and a 7-bit indication field, the 7-bit indication field being used to indicate the numerical value of the updated value;

[0353] 8-bit indication field, the 8-bit indication field being used to indicate the numerical value of the updated value;

[0354] 4-bit indication field, the 4-bit indication field being used to indicate the absolute value of the updated value.

[0355] The specific examples in the embodiments are described with reference to the corresponding descriptions of the embodiments in FIGS. 1-16, which are not repeated here.

[0356] The communication method related to the embodiments can include at least one of steps S301-S302. For example, step S301 can be implemented as an independent embodiment, and step S302 can be implemented as an independent embodiment. In addition, part or all of the steps S301-S302 can be combined to implement an independent embodiment, and the embodiments are not limited in this regard.

[0357] By applying the scheme of the embodiments of the present disclosure, for a terminal supporting unified TCI state configuration and configured by a network device as a unified transmission configuration indication manner, first information sent by the network device can be received, and the first configuration is updated according to the first information; wherein the first configuration is used to determine the PL offset corresponding to the UL-only TRP. Further, the PL offset corresponding to the UL-only TRP can be updated.

[0358] FIG. 18 shows a flow diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG. 18, the method is applied to the network device side and can include the following steps.

[0359] Step S401, the network device sends first information to the terminal.

[0360] In some embodiments, the terminal supports unified TCI state configuration.

[0361] In some embodiments, the terminal is configured by the network device as a unified transmission configuration indication manner.

[0362] In some embodiments, the first information includes related information indicating unified TCI state supporting S-TRP transmission.

[0363] In some embodiments, the first information is used to update the first configuration, and the first configuration is used to determine the PL offset corresponding to the UL-only TRP.

[0364] In some embodiments, at least one of the following includes the first configuration:

[0365] The first joint TCI state is configured by RRC signaling;

[0366] The first UL TCI state is configured by RRC signaling;

[0367] The second joint TCI state is activated by a MAC control element (CE) indication;

[0368] a second UL TCI state, the second UL TCI state being activated by a MAC CE indication;

[0369] a third joint TCI state, the third joint TCI state being applied by a DCI indication, or being applied by a joint DCI and RRC signaling indication;

[0370] a third UL TCI state, the third UL TCI state being applied by a DCI indication, or being applied by a joint DCI and RRC signaling indication.

[0371] In some embodiments, the first information comprises a first MAC CE.

[0372] In some embodiments, an indication field in the first MAC CE is used to indicate an updated value of the PL offset.

[0373] In some embodiments, a number of bits used in the indication field in the first MAC CE is determined according to an indication range and an indication step size of the PL offset.

[0374] In some embodiments, the indication step size of the PL offset comprises one of:

[0375] 1 dB; 2 dB; 4 dB.

[0376] In some embodiments, taking the indication step size of the PL offset as 4 dB for example, at least 5 bits of the indication field in the first MAC CE are used to indicate a numerical value of the updated value of the PL offset.

[0377] In some embodiments, taking the indication step size of the PL offset as 4 dB for example, 1 bit of the indication field in the first MAC CE is used to indicate a positive or negative value of the updated value of the PL offset, and LSB 4 bits of the indication field are used to indicate an absolute value of the updated value of the PL offset.

[0378] In some embodiments, taking the indication step size of the PL offset as 4 dB for example, at least 5 bits of the indication field in the first MAC CE are used to indicate a numerical value of the updated value of the PL offset, and MSB of the indication field is used to indicate a positive or negative value of the updated value of the PL offset, and LSB of the indication field is used to indicate an absolute value of the updated value of the PL offset.

[0379] In some embodiments, the first MAC CE has at least one first indication field, and the first indication field is used to indicate whether the TCI state corresponding to the TCI codepoint is updated with the PL offset.

[0380] In some embodiments, the signaling length of the first MAC CE is determined by the first indication field, and the first indication field is determined by one of the following:

[0381] a first number, the first number is used to represent the number of TCI state codepoints;

[0382] a second number, the second number is used to represent the number of joint TCI states corresponding to the TCI state codepoint that need to update the PL offset;

[0383] a third number, the third number is used to represent the number of UL TCI states corresponding to the TCI state codepoint that need to update the PL offset.

[0384] In some embodiments, the first indication field is a first value, which is used to determine that the TCI codepoint contains joint TCI state or UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated.

[0385] The first indication field is a second value, which is used to determine that the TCI codepoint does not contain joint TCI state and UL TCI state; or,

[0386] The first indication field is a second value, which is used to determine that the TCI codepoint contains joint TCI state or UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated.

[0387] Wherein, the first value and the second value are one of 0 and 1, and the first value is different from the second value.

[0388] In some embodiments, the first MAC CE has at least one second indication field, and the second indication field is used to indicate whether the PL offset update value corresponding to the TCI state is a positive value or a negative value.

[0389] In some examples, the indication field corresponding to the update value of the PL offset in the first MAC CE includes at least one of the following:

[0390] 1 bit of the second indication field, 3 reserved bits, and 4 bits of an indication field, the 4 bits of the indication field being used to indicate an absolute value of the update value;

[0391] 3 reserved bits and 5 bits of an indication field, the 5 bits of the indication field being used to indicate a numerical value of the update value;

[0392] 1 bit of the second indication field and 7 bits of an indication field, the 7 bits of the indication field being used to indicate a numerical value of the update value;

[0393] 8 bits of an indication field, the 8 bits of the indication field being used to indicate a numerical value of the update value;

[0394] 4 bits of an indication field, the 4 bits of the indication field being used to indicate an absolute value of the update value.

[0395] The description of the specific examples in the embodiments can be referred to the corresponding description of the embodiments in FIGS. 1-17, which will not be repeated here.

[0396] By applying the scheme of the embodiments of the present disclosure, for a terminal supporting unified TCI state configuration and configured by a network device as a unified transmission configuration indication mode, first information sent by the network device can be received, and a first configuration is updated according to the first information; wherein the first configuration is used to determine a PL offset corresponding to a UL-only TRP. Further, the PL offset corresponding to the UL-only TRP can be updated.

[0397] Based on the description of each of the above embodiments, the following specific examples are given, but are not limited thereto:

[0398] For a terminal only supporting R17 unified TCI state, only DL S-TRP / UL S-TRP transmission can be supported, i.e., the PL offset corresponding to the joint / UL TCI state is updated by MAC-CE;

[0399] The update of the MAC-CE for the PL offset is applied to:

[0400] Alt.1: joint / UL TCI state configured by RRC;

[0401] Alt.2: activated joint / UL TCI state activated by MAC-CE;

[0402] Alt.3: joint / UL TCI state currently applied.

[0403] Wherein, the indication range of PL offset is [-A, B], the indication step (granularity) is 4dB, and the indication method has the following three methods:

[0404] Alt.1: At least 5-bit indication field is used to indicate the actual value of PL offset;

[0405] Alt.2: 1-bit indication field is used to indicate the positive / negative value of PL offset, and 4-bit LSB indication field is used to indicate the absolute value of PL offset;

[0406] Alt.3: At least 5-bit indication field is used to indicate the actual value of PL offset, MSB is used to indicate the positive / negative value of PL offset, and LSB is used to indicate the absolute value of PL offset;

[0407] Consider more bits to support smaller step indication design, such as 1dB, 2dB;

[0408] For MAC-CE design:

[0409] Method 1: Extend the R17 UTCI state MAC-CE to a new MAC-CE;

[0410] Method 2: Design a new MAC-CE;

[0411] MAC-CE design corresponding to method 1:

[0412] Define Fi indication field to indicate whether the TCI state corresponding to the i-th TCI codepoint needs PL offset update. 1 means update, 0 means no need;

[0413] The PL_offset indication field can be indicated in the following ways:

[0414] Define 1-bit P / N+3-bit R+4-bit absolute value;

[0415] 3-bit R+5-bit actual value;

[0416] 1-bit P / N+7-bit actual value;

[0417] 8-bit actual value; (Can support lower indication step)

[0418] Wherein, the maximum value of N is 8;

[0419] MAC-CE design corresponding to method 2

[0420] Design 1:

[0421] Redefine P indication field to indicate whether the TCI state corresponding to the i-th TCI codepoint needs PL offset update, 1 means corresponding to an updated value, 0 means no update or corresponding to a DL TRP;

[0422] Define P / N indication field to indicate whether the PL offset value corresponding to the TCI state (N <= 8) that needs to be updated is a positive value or a negative value;

[0423] The PL_offset indication field can be indicated in the following ways:

[0424] 4-bit absolute value;

[0425] Design 2:

[0426] Taking updating the PL offset corresponding to the activated TCI state as an example,

[0427] Redefine P indication field to indicate whether the TCI state corresponding to the i-th TCI codepoint needs PL offset update, 1 means corresponding to an updated value, 0 means no update or corresponding to a DL TRP;

[0428] PL_offset indication field:

[0429] 1-bit P / N + 3-bit R + 4-bit absolute value;

[0430] 3-bit R + 5-bit actual value;

[0431] 1-bit P / N + 7-bit actual value;

[0432] 8-bit actual value; (can support lower indication step)

[0433] The embodiments of the present disclosure define a MAC-CE update method for supporting a terminal of a R17 unified TCI version and configuring different PL offset values corresponding to unified TCI modes in an UL-only scenario.

[0434] The embodiments of the present disclosure also propose a device for implementing any of the above methods, for example, a device comprising units or modules for implementing each step performed by the terminal in any of the above methods. For another example, another device is also proposed, comprising units or modules for implementing each step performed by the network equipment (such as access network equipment, core network function node, core network equipment, etc.) in any of the above methods.

[0435] It should be understood that the division of each unit or module in the above apparatus is only a logical function division, and all or part of them can be integrated into a physical entity or physically separated in actual implementation. In addition, the units or modules in the apparatus can be implemented in the form of processor calling software: for example, the apparatus includes a processor connected with a memory, the memory stores instructions, and the processor calls the instructions stored in the memory to implement any of the above methods or realize the functions of the units or modules of the above apparatus, wherein the processor is, for example, a general processor such as a central processing unit (CPU) or a microprocessor, and the memory is a memory in the apparatus or a memory outside the apparatus. Alternatively, the units or modules in the apparatus can be implemented in the form of hardware circuit, and the functions of part or all of the units or modules can be realized by the design of the hardware circuit. The above hardware circuit can be understood as one or more processors; for example, in one implementation, the above hardware circuit is an application-specific integrated circuit (ASIC), and the functions of part or all of the units or modules are realized by the design of the logical relationship of the elements in the circuit; for another example, in another implementation, the above hardware circuit is a programmable logic IoT terminal device (PLD), and taking a field programmable gate array (FPGA) as an example, it can include a large number of logic gate circuits, and the connection relationship between the logic gate circuits is configured by a configuration file, so as to realize the functions of part or all of the above units or modules. All units or modules of the above apparatus can be implemented in the form of processor calling software, or all units or modules can be implemented in the form of hardware circuit, or part of the units or modules are implemented in the form of processor calling software, and the remaining part is implemented in the form of hardware circuit.

[0436] In the embodiments of the present disclosure, the processor is a circuit with signal processing capability. In one implementation, the processor can be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), a digital signal processor (DSP), or the like. In another implementation, the processor can implement certain functions through a logical relationship of a hardware circuit, and the logical relationship of the hardware circuit is fixed or can be reconfigured. For example, the processor is a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In the reconfigurable hardware circuit, the processor loads a configuration document to implement the configuration of the hardware circuit. It can be understood that the processor loads instructions to implement the functions of the above part or all units or modules. In addition, the hardware circuit can also be designed for artificial intelligence, which can be understood as an ASIC, such as a neural network processing unit (NPU), a tensor processing unit (TPU), a deep learning processing unit (DPU), and the like.

[0437] FIG. 19 is a structural schematic diagram of a terminal according to an embodiment of the present disclosure. As shown in FIG. 19, the terminal can include a transceiver module 61 and a processing module 62. In some embodiments, the transceiver module 61 and the processing module 62 are configured to perform at least one of the communication steps performed by the terminal in any of the above methods (for example, steps S301 to S302, but not limited thereto). Details are not described herein.

[0438] In some embodiments, the transceiver module described above can include a sending module and / or a receiving module, which can be separate or integrated together. Alternatively, the transceiver module can be replaced by a transceiver.

[0439] In some embodiments, the first configuration is used to determine the PL offset corresponding to the UL-only TRP.

[0440] In some embodiments, at least one of the following includes the first configuration:

[0441] a first joint TCI state, the first joint TCI state being configured through RRC signaling;

[0442] a first UL TCI state, the first UL TCI state being configured through RRC signaling;

[0443] a second joint TCI state, the second joint TCI state being activated through a MAC CE indication;

[0444] a second UL TCI state, the second UL TCI state being activated through a MAC CE indication;

[0445] a third joint TCI state, the third joint TCI state being applied through a DCI indication, or being applied through a DCI and RRC signaling jointly indication;

[0446] a third UL TCI state, the third UL TCI state being applied through a DCI indication, or being applied through a DCI and RRC signaling jointly indication.

[0447] In some embodiments, the first information can include a first MAC CE.

[0448] In some embodiments, an indication field in the first MAC CE can be used to indicate an updated value of the PL offset.

[0449] In some embodiments, a number of bits used in the indication field of the first MAC CE is determined according to an indication range and an indication step of the PL offset.

[0450] In some embodiments, the indication step of the PL offset includes one of:

[0451] 1 dB; 2 dB; 4 dB.

[0452] In some embodiments, taking the indication step of the PL offset as 4 dB for example, at least 5-bit indication field in the first MAC CE is used to indicate a numerical value of the updated value of the PL offset.

[0453] In some embodiments, taking the indication step of the PL offset as 4 dB for example, 1-bit indication field in the first MAC CE is used to indicate a positive or negative value of the updated value of the PL offset, and LSB 4-bit indication field is used to indicate an absolute value of the updated value of the PL offset.

[0454] In some embodiments, the indication step of the PL offset is 4dB, at least 5 bits in the first MAC CE are used to indicate the value of the updated PL offset, the MSB is used to indicate the positive or negative value of the updated PL offset, and the LSB is used to indicate the absolute value of the updated PL offset.

[0455] In some embodiments, the first MAC CE has at least one first indication field, and the first indication field is used to indicate whether the TCI codepoint corresponds to a TCI state that needs to update the PL offset.

[0456] In some embodiments, the signaling length of the first MAC CE is determined by the first indication field, and the first indication field is determined by one of the following:

[0457] A first number, the first number is used to represent the number of TCI state codepoints;

[0458] A second number, the second number is used to represent the number of joint TCI states corresponding to the TCI state codepoint that need to update the PL offset;

[0459] A third number, the third number is used to represent the number of UL TCI states corresponding to the TCI state codepoint that need to update the PL offset.

[0460] In some embodiments, the first indication field is a first value, which is used to determine that the TCI codepoint contains joint TCI state or UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated;

[0461] The first indication field is a second value, which is used to determine that the TCI codepoint does not contain joint TCI state and UL TCI state; or,

[0462] The first indication field is a second value, which is used to determine that the TCI codepoint contains joint TCI state or UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated;

[0463] Wherein, the first value and the second value are one of 0 and 1, and the first value is different from the second value.

[0464] In some embodiments, the first MAC CE has at least one second indication field, and the second indication field is used to indicate that the PL offset update value corresponding to the TCI state is a positive value or a negative value.

[0465] In some examples, the indication field corresponding to the update value of the PL offset in the first MAC CE includes at least one of the following:

[0466] 1 bit of the second indication field, 3 reserved bits, and 4-bit indication field, the 4-bit indication field being used to indicate the absolute value of the update value;

[0467] 3 reserved bits and 5-bit indication field, the 5-bit indication field being used to indicate the numerical value of the update value;

[0468] 1 bit of the second indication field and 7-bit indication field, the 7-bit indication field being used to indicate the numerical value of the update value;

[0469] 8-bit indication field, the 8-bit indication field being used to indicate the numerical value of the update value;

[0470] 4-bit indication field, the 4-bit indication field being used to indicate the absolute value of the update value.

[0471] FIG. 20 is a structural schematic diagram of a network device according to an embodiment of the present disclosure. As shown in FIG. 20, the network device can include a transceiver module 71. In some embodiments, the transceiver module 71 is configured to perform at least one of the communication steps performed by the network device in any of the above methods (for example, step S401, but not limited thereto), and details are not described herein.

[0472] In some embodiments, the transceiver module described above can include a sending module and / or a receiving module, which can be separate or integrated together. Alternatively, the transceiver module can be mutually replaced with a transceiver.

[0473] In some embodiments, the transceiver module described above can include a sending module and / or a receiving module, which can be separate or integrated together. Alternatively, the transceiver module can be mutually replaced with a transceiver.

[0474] In some embodiments, the first configuration is used to determine the PL offset corresponding to the UL-only TRP.

[0475] In some embodiments, the first configuration includes at least one of the following:

[0476] The first joint TCI state is configured by RRC signaling;

[0477] a first UL TCI state, the first UL TCI state being configured through RRC signaling;

[0478] a second joint TCI state, the second joint TCI state being activated through MAC CE indication;

[0479] a second UL TCI state, the second UL TCI state being activated through MAC CE indication;

[0480] a third joint TCI state, the third joint TCI state being applied through DCI indication, or being applied through joint DCI and RRC signaling indication;

[0481] a third UL TCI state, the third UL TCI state being applied through DCI indication, or being applied through joint DCI and RRC signaling indication.

[0482] In some embodiments, the first information can include a first MAC CE.

[0483] In some embodiments, an indication field in the first MAC CE can be used to indicate an updated value of the PL offset.

[0484] In some embodiments, a number of bits used in the indication field of the first MAC CE is determined according to an indication range and an indication step of the PL offset.

[0485] In some embodiments, the indication step of the PL offset includes one of:

[0486] 1 dB; 2 dB; 4 dB.

[0487] In some embodiments, taking the indication step of the PL offset as 4 dB for example, at least 5-bit indication field in the first MAC CE is used to indicate a numerical value of the updated value of the PL offset.

[0488] In some embodiments, taking the indication step of the PL offset as 4 dB for example, 1-bit indication field in the first MAC CE is used to indicate a positive or negative value of the updated value of the PL offset, and LSB 4-bit indication field is used to indicate an absolute value of the updated value of the PL offset.

[0489] In some embodiments, the indication step of the PL offset is 4dB, at least 5 bits in the first MAC CE are used to indicate the value of the updated PL offset, the MSB is used to indicate the positive or negative value of the updated PL offset, and the LSB is used to indicate the absolute value of the updated PL offset.

[0490] In some embodiments, the first MAC CE has at least one first indication field, and the first indication field is used to indicate whether the TCI codepoint corresponds to a TCI state that needs to update the PL offset.

[0491] In some embodiments, the signaling length of the first MAC CE is determined by the first indication field, and the first indication field is determined by one of the following:

[0492] A first number, the first number is used to represent the number of TCI state codepoints;

[0493] A second number, the second number is used to represent the number of joint TCI states corresponding to the TCI state codepoint that need to update the PL offset;

[0494] A third number, the third number is used to represent the number of UL TCI states corresponding to the TCI state codepoint that need to update the PL offset.

[0495] In some embodiments, the first indication field is a first value, which is used to determine that the TCI codepoint contains joint TCI state or UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated;

[0496] The first indication field is a second value, which is used to determine that the TCI codepoint does not contain joint TCI state and UL TCI state; or,

[0497] The first indication field is a second value, which is used to determine that the TCI codepoint contains joint TCI state or UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated;

[0498] Wherein, the first value and the second value are one of 0 and 1, and the first value is different from the second value.

[0499] In some embodiments, the first MAC CE has at least one second indication field, and the second indication field is used to indicate that the PL offset update value corresponding to the TCI state is a positive value or a negative value.

[0500] In some examples, the indication field corresponding to the update value of the PL offset in the first MAC CE includes at least one of the following:

[0501] 1 bit of the second indication field, 3 reserved bits, and 4-bit indication field, the 4-bit indication field being used to indicate the absolute value of the update value;

[0502] 3 reserved bits and 5-bit indication field, the 5-bit indication field being used to indicate the numerical value of the update value;

[0503] 1 bit of the second indication field and 7-bit indication field, the 7-bit indication field being used to indicate the numerical value of the update value;

[0504] 8-bit indication field, the 8-bit indication field being used to indicate the numerical value of the update value;

[0505] 4-bit indication field, the 4-bit indication field being used to indicate the absolute value of the update value.

[0506] FIG. 21 is a structural schematic diagram of a communication device 8100 according to an embodiment of the present disclosure. The communication device 8100 can be a network device (such as an access network device, a core network device, etc.), a terminal (such as a user equipment, etc.), a chip, a chip system, or a processor supporting the implementation of the above-mentioned method by the network device, a chip, a chip system, or a processor supporting the implementation of the above-mentioned method by the terminal, etc. The communication device 8100 can be used to implement the methods described in the above method embodiments, and details can be referred to the descriptions in the above method embodiments.

[0507] As shown in FIG. 21, the communication device 8100 includes one or more processors 8101. The processor 8101 can be a general-purpose processor or a special-purpose processor, etc., such as a baseband processor or a central processing unit. The baseband processor can be used to process communication protocols and communication data, and the central processing unit can be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute programs, and process data of the programs. Optionally, the communication device 8100 is configured to execute any of the above methods. Optionally, the one or more processors 8101 are configured to invoke instructions to cause the communication device 8100 to execute any of the above methods.

[0508] In some embodiments, the communication device 8100 further includes one or more transceivers 8102. When the communication device 8100 includes one or more transceivers 8102, the transceiver 8102 performs the communication steps such as transmitting and / or receiving in the above-described methods, and the processor 8101 performs at least one of the other steps. In alternative embodiments, the transceiver can include a receiver and / or a transmitter, which can be separate or integrated together. Alternatively, the terms transceiver, transceiving unit, transceiver, transceiving circuit, interface circuit, interface, etc. can be replaced by each other, the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc. can be replaced by each other, and the terms receiver, receiving unit, receiver, receiving circuit, etc. can be replaced by each other.

[0509] In some embodiments, the communication device 8100 further includes one or more memories 8103 for storing data. Alternatively, all or part of the memory 8103 can also be outside the communication device 8100. In alternative embodiments, the communication device 8100 can include one or more interface circuits 8104. Alternatively, the interface circuit 8104 is connected with the memory 8102, and the interface circuit 8104 can be used to receive data from the memory 8102 or other devices, and can be used to send data to the memory 8102 or other devices. For example, the interface circuit 8104 can read the data stored in the memory 8102 and send the data to the processor 8101.

[0510] The communication device 8100 described in the above embodiments can be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 can not be limited by Figure 21. The communication device can be a standalone device or can be part of a larger device. For example, the communication device can be: 1) a standalone integrated circuit (IC), or a chip, or a chip system or subsystem; (2) a set of one or more ICs, which can optionally include storage components for storing data, programs; (3) an ASIC, such as a Modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, a smart terminal device, a cellular phone, a wireless device, a handset, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0511] Figure 22 is a structural schematic diagram of a chip 8200 according to an embodiment of the present disclosure. For the case where the communication device 8100 is a chip or a chip system, the structural schematic diagram of the chip 8200 shown in Figure 22 can be referred to, but is not limited thereto.

[0512] The chip 8200 includes one or more processors 8201. The chip 8200 is configured to execute any of the above methods.

[0513] In some embodiments, chip 8200 further includes one or more interface circuits 8202. Optionally, the terms interface circuit, interface, transceiver pin, and the like are interchangeable. In some embodiments, chip 8200 further includes one or more memories 8203 for storing data. Optionally, all or part of memory 8203 can be external to chip 8200. Optionally, interface circuit 8202 is connected to memory 8203, and interface circuit 8202 can be used to receive data from memory 8203 or other devices, and interface circuit 8202 can be used to send data to memory 8203 or other devices. For example, interface circuit 8202 can read data stored in memory 8203 and send the data to processor 8201.

[0514] In some embodiments, interface circuit 8202 performs at least one of the communication steps of sending and / or receiving in the above-described methods. The performance of interface circuit 8202 in the communication steps of sending and / or receiving in the above-described methods refers to, for example, interface circuit 8202 performing data interaction between processor 8201, chip 8200, memory 8203, or transceiver devices. In some embodiments, processor 8201 performs at least one of the communication method steps described above.

[0515] The modules and / or devices described in each of the embodiments of virtual devices, physical devices, chips, and the like can be combined or separated as appropriate. Optionally, some or all of the steps can also be performed by multiple modules and / or devices in cooperation, which is not limited here.

[0516] The disclosure also proposes a storage medium, and the above-mentioned storage medium stores instructions, when the above-mentioned instructions run on communication device 8100, the communication device 8100 executes any one of the above methods. Optionally, the above-mentioned storage medium is an electronic storage medium. Optionally, the above-mentioned storage medium is a computer-readable storage medium, but is not limited to this, it can also be a storage medium readable by other devices. Optionally, the above-mentioned storage medium can be a non-transitory storage medium, but is not limited to this, it can also be a transitory storage medium.

[0517] The disclosure also proposes a program product, and the above-mentioned program product is executed by communication device 8100, so that communication device 8100 executes any one of the above methods. Optionally, the above-mentioned program product is a computer program product.

[0518] The disclosure also proposes a computer program, when it runs on a computer, the computer executes any one of the above methods.

Claims

1. A communication method characterized by comprising: The method is performed by a terminal, and the method comprises: receiving first information sent by a network device, the first information comprising information indicating a unified transmission configuration indication state (unified TCI state) supporting single-transmission reception point (S-TRP) transmission; updating a first configuration according to the first information; wherein the first configuration is used to determine a path loss offset (PL offset) corresponding to a transmission reception point (TRP) for uplink only (UL-only).

2. The method of claim 1, wherein, The first configuration comprises at least one of the following: a first joint transmission configuration indication state (first joint TCI state) configured by radio resource control (RRC) signaling; a first uplink transmission configuration indication state (first UL TCI state) configured by RRC signaling; a second joint TCI state activated by a medium access control (MAC) control element (CE) indication; a second UL TCI state activated by a MAC CE indication; a third joint TCI state applied by a downlink control information (DCI) indication or applied by a DCI and RRC signaling indication together; a third UL TCI state applied by a DCI indication or applied by a DCI and RRC signaling indication together.

3. The method of any one of claims 1-2, wherein, The first information comprises a first MAC CE.

4. The method of claim 3, wherein, An indication field in the first MAC CE is used to indicate an updated value of the PL offset.

5. The method of claim 4, wherein, A number of bits used in the indication field is determined according to an indication range and an indication step of the PL offset.

6. The method of claim 5, wherein, The indication step comprises one of the following: 1 dB; 2 dB; 4 dB.

7. The method of any one of claims 3 to 6, wherein: at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value; or 1 bit of an indication field in the first MAC CE is used to indicate a positive or negative value of the updated value, and least significant bit (LSB) 4 bits of an indication field in the first MAC CE are used to indicate an absolute value of the updated value; or at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value, most significant bit (MSB) of an indication field in the first MAC CE is used to indicate a positive or negative value of the updated value, and LSB of an indication field in the first MAC CE is used to indicate an absolute value of the updated value.

8. The method according to any one of claims 3 to 7, characterized in that, The first MAC CE has at least one first indication field, and the first indication field is used to indicate whether a TCI state corresponding to a TCI codepoint is updated by a PL offset.

9. The method of claim 8, wherein, A signaling length of the first MAC CE is determined by the first indication field, and the first indication field is determined by one of the following: A first number, the first number being used to represent a number of TCI state codepoints; A second number, the second number being used to represent a number of joint TCI states corresponding to the TCI state codepoints that need to update the PLoffset; A third number, the third number being used to represent a number of UL TCI states corresponding to the TCI state codepoints that need to update the PLoffset.

10. The method of any one of claims 8-9, wherein, The first indication field is a first value for determining that the TCI codepoint contains a joint TCI state or an UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated; The first indication field is a second value for determining that the TCI codepoint does not contain a joint TCI state and an UL TCI state; or The first indication field is a second value for determining that the TCI codepoint contains a joint TCI state or an UL TCI state, and the PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated; The first value and the second value are one of 0 and 1, and the first value is different from the second value.

11. The method according to any one of claims 8 to 10, characterized in that, The first MAC CE has at least one second indication field, the second indication field being used to indicate that the PL offset update value corresponding to the TCI state is a positive value or a negative value.

12. The method of claim 11, wherein, The indication field corresponding to the update value in the first MAC CE includes at least one of the following: 1-bit second indication field, 3 reserved bits, and 4-bit indication field, the 4-bit indication field being used to indicate the absolute value of the update value; 3 reserved bits and 5-bit indication field, the 5-bit indication field being used to indicate the numerical value of the update value; 1-bit second indication field and 7-bit indication field, the 7-bit indication field being used to indicate the numerical value of the update value; 8-bit indication field, the 8-bit indication field being used to indicate the numerical value of the update value; 4-bit indication field, the 4-bit indication field being used to indicate the absolute value of the update value.

13. A method of communication, comprising: The method is performed by a network device, and the method includes: sending, to a terminal, first information including information indicating that a unified transmission configuration indication state (TCI state) supporting single-transmission reception point (S-TRP) transmission is supported; The first information is used to update a first configuration used to determine a path loss offset (PL offset) corresponding to an uplink only (UL-only) transmission reception point (TRP).

14. The method of claim 13, wherein, The first configuration includes at least one of the following: A first joint TCI state is configured by radio resource control (RRC) signaling; a first uplink transmission configuration indication state (UL TCI state), which is configured by RRC signaling; a second joint TCI state, which is activated by a media access control (MAC) control element (CE) indication; a second UL TCI state, which is activated by a MAC CE indication; a third joint TCI state, which is applied by a downlink control information (DCI) indication or a joint DCI and RRC signaling indication; a third UL TCI state, which is applied by a DCI indication or a joint DCI and RRC signaling indication.

15. The method of any one of claims 13-14, wherein, The first information includes a first MAC CE.

16. The method of claim 15, wherein, An indication field in the first MAC CE is used to indicate an updated value of the PL offset.

17. The method of claim 16, wherein, The number of bits used in the indication field is determined according to an indication range and an indication step of the PL offset.

18. The method of claim 17, wherein, The indication step includes one of the following: 1 dB; 2 dB; 4 dB.

19. The method of any one of claims 15 to 18, wherein at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value; or 1 bit of an indication field in the first MAC CE is used to indicate a positive or negative value of the updated value, and least significant bit (LSB) 4 bits of an indication field in the first MAC CE are used to indicate an absolute value of the updated value; or at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value, most significant bit (MSB) of an indication field in the first MAC CE is used to indicate a positive or negative value of the updated value, and LSB of an indication field in the first MAC CE is used to indicate an absolute value of the updated value.

20. The method of any one of claims 15-19, wherein, The first MAC CE has at least one first indication field, which is used to indicate whether a TCI state corresponding to a TCI codepoint is updated with a PL offset.

21. The method of claim 20, wherein, A signaling length of the first MAC CE is determined by the first indication field, which is determined by one of the following: a first number, which is used to represent a number of TCI state codepoints; a second number, which is used to represent a number of joint TCI states corresponding to the TCI state codepoints and requiring a PL offset update; a third number, which is used to represent a number of UL TCI states corresponding to the TCI state codepoints and requiring a PL offset update.

22. The method of any one of claims 20-21, wherein, The first indication field is a first value for determining that the TCI codepoint contains a joint TCI state or an UL TCI state, and that the PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated; The first indication field is a second value for determining that the TCI codepoint does not contain a joint TCI state and an UL TCI state; or The first indication field is a second value for determining that the TCI codepoint contains a joint TCI state or an UL TCI state, and that the PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated; The first value and the second value are one of 0 and 1, and the first value is different from the second value.

23. The method of any one of claims 20-22, wherein, The first MAC CE has at least one second indication field, and the second indication field is used to indicate that the PL offset update value corresponding to the TCI state is a positive value or a negative value.

24. The method of claim 23, wherein, The indication field corresponding to the update value in the first MAC CE includes at least one of the following: 1-bit second indication field, 3 reserved bits, and 4-bit indication field, the 4-bit indication field is used to indicate the absolute value of the update value; 3 reserved bits and 5-bit indication field, the 5-bit indication field is used to indicate the numerical value of the update value; 1-bit second indication field and 7-bit indication field, the 7-bit indication field is used to indicate the numerical value of the update value; 8-bit indication field, the 8-bit indication field is used to indicate the numerical value of the update value; 4-bit indication field, the 4-bit indication field is used to indicate the absolute value of the update value.

25. A method of communication, comprising: Comprising: The network device sends first information to the terminal, and the first information includes information indicating that a unified transmission configuration indication state (unified TCI state) supporting single transmission reception point (S-TRP) transmission is supported; The terminal receives the first information and updates a first configuration according to the first information; The first configuration is used to determine the path loss offset (PL offset) corresponding to the uplink only (UL-only) transmission reception point (TRP).

26. A terminal, characterized by Comprising: The transceiver module is configured to receive first information sent by the network device, and the first information includes information indicating that a unified transmission configuration indication state (unified TCI state) supporting single transmission reception point (S-TRP) transmission is supported; The processing module is configured to update a first configuration according to the first information; The first configuration is used to determine the path loss offset (PL offset) corresponding to the uplink only (UL-only) transmission reception point (TRP).

27. The terminal according to claim 26, characterized by The first configuration includes at least one of the following: The first joint transmission configuration indication state (joint TCI state) is configured by radio resource control (RRC) signaling; a first uplink transmission configuration indication state (UL TCI state), which is configured by RRC signaling; a second joint TCI state, which is activated by a media access control (MAC) control element (CE) indication; a second UL TCI state, which is activated by a MAC CE indication; a third joint TCI state, which is applied by a downlink control information (DCI) indication or a joint DCI and RRC signaling indication; a third UL TCI state, which is applied by a DCI indication or a joint DCI and RRC signaling indication.

28. The terminal of any one of claims 26-27, wherein, The first information includes a first MAC CE.

29. The terminal according to claim 28, characterized by An indication field in the first MAC CE is used to indicate an updated value of the PL offset.

30. The terminal according to claim 29, characterized by A number of bits used in the indication field is determined according to an indication range and an indication step of the PL offset.

31. The terminal according to claim 30, characterized by The indication step includes one of the following: 1 dB; 2 dB; 4 dB.

32. The terminal of any one of claims 28-31, wherein: at least 5 bits of the first MAC CE are used to indicate a numerical value of the updated value; or 1 bit of the first MAC CE is used to indicate a positive or negative value of the updated value, and least significant bit (LSB) 4 bits are used to indicate an absolute value of the updated value; or at least 5 bits of the first MAC CE are used to indicate a numerical value of the updated value, most significant bit (MSB) bits are used to indicate a positive or negative value of the updated value, and LSB bits are used to indicate an absolute value of the updated value.

33. The terminal of any one of claims 28-32, wherein, The first MAC CE has at least one first indication field, which is used to indicate whether a TCI state corresponding to a TCI codepoint is updated with a PL offset.

34. The terminal according to claim 33, characterized by A signaling length of the first MAC CE is determined by the first indication field, which is determined by one of the following: a first number, which is used to represent a number of TCI state codepoints; a second number, which is used to represent a number of joint TCI states corresponding to the TCI state codepoints and requiring a PL offset update; a third number, which is used to represent a number of UL TCI states corresponding to the TCI state codepoints and requiring a PL offset update.

35. The terminal of any one of claims 33-34, wherein, The first indication field is a first value for determining that the TCI codepoint contains a joint TCI state or an UL TCI state, and that a PL offset corresponding to the contained joint TCI state or UL TCI state needs to be updated. The first indication field is a second value for determining that the TCI codepoint does not contain a joint TCI state and an UL TCI state; or The first indication field is a second value for determining that the TCI codepoint contains a joint TCI state or an UL TCI state, and that a PL offset corresponding to the contained joint TCI state or UL TCI state does not need to be updated. The first value and the second value are one of 0 and 1, and the first value is different from the second value.

36. The terminal of any one of claims 34-35, wherein, The first MAC CE has at least one second indication field, and the second indication field is used to indicate that a PL offset update value corresponding to a TCI state is a positive value or a negative value.

37. The terminal according to claim 36, characterized by The indication field corresponding to the update value in the first MAC CE includes at least one of the following: 1-bit second indication field, 3 reserved bits, and 4-bit indication field, the 4-bit indication field is used to indicate the absolute value of the update value; 3 reserved bits and 5-bit indication field, the 5-bit indication field is used to indicate the numerical value of the update value; 1-bit second indication field and 7-bit indication field, the 7-bit indication field is used to indicate the numerical value of the update value; 8-bit indication field, the 8-bit indication field is used to indicate the numerical value of the update value; 4-bit indication field, the 4-bit indication field is used to indicate the absolute value of the update value.

38. A network device, comprising: Comprise: The transceiver module is configured to send first information to the terminal, and the first information includes information indicating that a unified transmission configuration indication state (unified TCI state) supporting single transmission reception point (S-TRP) transmission is supported; The first information is used to update a first configuration, and the first configuration is used to determine a path loss offset (PL offset) corresponding to an uplink only (UL-only) transmission reception point (TRP).

39. The network device of claim 38, wherein, The first configuration includes at least one of the following: A first joint transmission configuration indication state (joint TCI state) is configured by radio resource control (RRC) signaling; A first uplink transmission configuration indication state (UL TCI state) is configured by RRC signaling; A second joint TCI state is activated by a medium access control (MAC) control element (CE) indication; A second UL TCI state is activated by a MAC CE indication; a third joint TCI state, which is indicated by a downlink control information (DCI) or jointly indicated by the DCI and radio resource control (RRC) signaling; a third UL TCI state, which is indicated by a DCI or jointly indicated by the DCI and RRC signaling.

40. The network device according to any of claims 38-39, wherein, The first information includes a first MAC CE.

41. The network device of claim 40, wherein, An indication field in the first MAC CE is used to indicate an updated value of the PL offset.

42. The network device of claim 41, wherein, The number of bits used in the indication field is determined according to an indication range and an indication step of the PL offset.

43. The network device of claim 42, wherein, The indication step includes one of the following: 1 dB; 2 dB; 4 dB.

44. The network device of any one of claims 40-43, wherein at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value; or 1 bit of an indication field in the first MAC CE is used to indicate a positive or negative value of the updated value, and 4 least significant bits (LSBs) of an indication field in the first MAC CE are used to indicate an absolute value of the updated value; or at least 5 bits of an indication field in the first MAC CE are used to indicate a numerical value of the updated value, and a most significant bit (MSB) of an indication field in the first MAC CE is used to indicate a positive or negative value of the updated value, and an LSB of an indication field in the first MAC CE is used to indicate an absolute value of the updated value.

45. The network device according to any of claims 40-44, wherein, The first MAC CE has at least one first indication field, which is used to indicate whether a TCI state corresponding to a TCI codepoint is updated with a PL offset.

46. The network device of claim 45, wherein, A signaling length of the first MAC CE is determined by the first indication field, which is determined by one of the following: a first number, which is used to represent a number of TCI state codepoints; a second number, which is used to represent a number of joint TCI states corresponding to the TCI state codepoints and requiring an updated PL offset; a third number, which is used to represent a number of UL TCI states corresponding to the TCI state codepoints and requiring an updated PL offset. 47.The network device according to any one of claims 45 to 46, characterized in that, The first indication field is a first value, which is used to determine that a TCI codepoint includes a joint TCI state or an UL TCI state, and a PL offset corresponding to the included joint TCI state or UL TCI state needs to be updated; The first indication field is a second value, which is used to determine that a TCI codepoint does not include a joint TCI state and an UL TCI state; or The first indication field is a second value for determining that the TCI codepoint contains a joint TCI state or an UL TCI state, and that the joint TCI state or the UL TCI state corresponding to the PL offset does not need to be updated. The first value and the second value are one of 0 and 1, and the first value is different from the second value. 48.The network device according to any one of claims 45 to 47, characterized in that, The first MAC CE has at least one second indication field, and the second indication field is used to indicate that the update value of the PL offset corresponding to the TCI state is a positive value or a negative value.

49. The network device of claim 48, wherein, The indication field corresponding to the update value in the first MAC CE includes at least one of the following: 1-bit second indication field, 3 reserved bits, and 4-bit indication field, the 4-bit indication field is used to indicate the absolute value of the update value; 3 reserved bits and 5-bit indication field, the 5-bit indication field is used to indicate the numerical value of the update value; 1-bit second indication field and 7-bit indication field, the 7-bit indication field is used to indicate the numerical value of the update value; 8-bit indication field, the 8-bit indication field is used to indicate the numerical value of the update value; 4-bit indication field, the 4-bit indication field is used to indicate the absolute value of the update value.

50. A communications device, characterized by Comprise: One or more processors; The processor is used to execute the method in any one of claims 1-24.

51. A communication system, characterized by Comprise a terminal and a network device, wherein the terminal is configured to implement the method in any one of claims 1-12, and the network device is configured to implement the method in any one of claims 13-24.

52. A computer storage medium, wherein, The computer storage medium stores computer executable instructions; the computer executable instructions are executed by the processor, and can implement the method in any one of claims 1-24.

53. A computer program product comprising a computer program, wherein the computer program is executed by a processor, and can implement the method in any one of claims 1-24.

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