Beam indication method, terminal, network device, communication system, and storage medium

Abstract

The present disclosure relates to a beam indication method, a terminal, a network device, a communication system, and a storage medium. The method comprises: a terminal receives beam indication information sent by a network device, wherein the beam indication information is used for indicating indexes of TCI state code points of one or more cooperative TRPs in a communication scenario of a downlink single-transmission and reception point (S-TRP) and an uplink multi-transmission and reception point (M-TRP); the multiple cooperative TRPs are used for the terminal to perform uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission. According to the embodiments of the present disclosure, the network device sends, to the terminal, the beam indication information for indicating the indexes of the TCI state code points of the one or more cooperative TRPs, so that the terminal can acquire beam information for transmission, thereby improving the communication efficiency.

Description

Beam indication method, terminal, network device, communication system and storage medium Technical Field

[0001] The present disclosure relates to the field of communication technologies, and in particular to a beam indication method, a terminal, a network device, a communication system, and a storage medium. Background Art

[0002] With the advancement of communication technologies, heterogeneous network deployments can enable the use of asymmetric multiple TRPs (Transmission Reception Points) for communication transmission, thereby improving uplink coverage and throughput. In a multi-TRP scenario, a cell includes a master gNB (next generation Node B) and multiple uplink TRPs. Uplink transmission can be coordinated by the master gNB and the uplink TRP, or by different uplink TRPs.

[0003] Summary of the Invention

[0004] In a multi-TRP scenario, how network equipment indicates beam information to the terminal is a technical problem that needs to be solved.

[0005] The embodiments of the present disclosure provide a beam indication method, a terminal, a network device, a communication system, and a storage medium.

[0006] According to the first aspect of an embodiment of the present disclosure, a beam indication method is proposed, the method comprising: a terminal receiving beam indication information sent by a network device, the beam indication information being used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; the multiple collaborative TRPs are used by the terminal for uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission.

[0007] According to the second aspect of an embodiment of the present disclosure, a beam indication method is proposed, the method comprising: a network device sends beam indication information to a terminal, the beam indication information being used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; the multiple collaborative TRPs are used by the terminal for uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission.

[0008] According to the third aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: a transceiver module for receiving beam indication information sent by a network device, wherein the beam indication information is used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; the multiple collaborative TRPs are used for the terminal to perform uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission.

[0009] According to the fourth aspect of an embodiment of the present disclosure, a network device is proposed, including: a transceiver module for sending beam indication information to a terminal, wherein the beam indication information is used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; the multiple collaborative TRPs are used for the terminal to perform uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission.

[0010] According to a fifth aspect of an embodiment of the present disclosure, a terminal is proposed, comprising: one or more processors; wherein the processor is used to execute the beam indication method of the first aspect.

[0011] According to a sixth aspect of an embodiment of the present disclosure, a network device is proposed, comprising: one or more processors; wherein the processor is used to execute the beam indication method of the second aspect.

[0012] According to the seventh aspect of an embodiment of the present disclosure, a communication system is proposed, including a terminal and a network device, wherein the terminal is configured to implement the beam indication method of the first aspect, and the network device is configured to implement the beam indication method of the second aspect.

[0013] According to an eighth aspect of an embodiment of the present disclosure, a storage medium is proposed, which stores instructions, and is characterized in that when the instructions are executed on a communication device, the communication device executes the beam indication method of the first aspect or the second aspect.

[0014] According to a ninth aspect of an embodiment of the present disclosure, a computer program product is proposed, comprising a computer program / instruction, which implements the beam indication method of the first aspect or the second aspect when executed by a processor.

[0015] Through the embodiments of the present disclosure, in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP, the network device sends beam indication information for indicating the index of the TCI status code point of one or more collaborative TRPs to the terminal, so that the terminal can obtain beam information for transmission, thereby improving communication efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following drawings required for describing the embodiments are introduced. The following drawings are merely some embodiments of the present disclosure and do not impose specific limitations on the protection scope of the present disclosure.

[0017] FIG1A is an exemplary schematic diagram of the architecture of a communication system provided according to an embodiment of the present disclosure.

[0018] FIG1B is a schematic diagram of multi-PANEL / TRP transmission based on single PDCCH scheduling.

[0019] FIG1C is a schematic diagram of multi-PANEL / TRP transmission based on different PDCCH scheduling.

[0020] FIG1D is a schematic diagram of transmission based on the SDM spatial division multiplexing scheme.

[0021] FIG. 1E is a schematic diagram of transmission based on the SDM spatial division multiplexing scheme.

[0022] FIG1F is a schematic diagram of MAC CE signaling for unified TCI state activation / deactivation.

[0023] FIG1G is a schematic diagram of MAC CE signaling for joint / independent TCI state activation / deactivation in an MTRP scenario.

[0024] FIG1H is a schematic diagram of MAC CE signaling for independent TCI state activation / deactivation.

[0025] FIG. 1I is a schematic diagram of the cell node functions in a macro cell.

[0026] FIG1J is a schematic diagram of the cell node function in a communication scenario with multiple uplink receiving points.

[0027] Figure 1K is a schematic diagram of a communication scenario with single downlink TRP transmission and multiple uplink TRP transmission.

[0028] FIG2 is an interactive schematic diagram of a beam indication method according to an embodiment of the present disclosure.

[0029] FIG3 is an interactive schematic diagram of a beam indication method according to an embodiment of the present disclosure.

[0030] FIG4 is a schematic flow chart of a beam indication method according to an embodiment of the present disclosure.

[0031] FIG5 is an interactive schematic diagram illustrating a beam indication method according to an embodiment of the present disclosure.

[0032] FIG6A is a schematic diagram of the structure of a terminal proposed in an embodiment of the present disclosure.

[0033] FIG6B is a schematic diagram of the structure of a network device proposed in an embodiment of the present disclosure.

[0034] FIG7A is a schematic structural diagram of a communication device proposed in an embodiment of the present disclosure.

[0035] FIG7B is a schematic diagram of the structure of the chip proposed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0036] The embodiments of the present disclosure provide a beam indication method, a terminal, a network device, a communication system, and a storage medium.

[0037] In the first aspect, an embodiment of the present disclosure proposes a beam indication method, which includes: a terminal receives beam indication information sent by a network device, wherein the beam indication information is used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; the multiple collaborative TRPs are used by the terminal to perform uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission.

[0038] In the above embodiment, in the communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP, the network device sends beam indication information for indicating the index of the TCI status code point of one or more collaborative TRPs to the terminal, so that the terminal can obtain the beam information used for transmission, thereby improving communication efficiency.

[0039] In combination with some embodiments of the first aspect, in some embodiments, the beam indication information is configured as an independent beam indication mode or is predefined to only support an independent beam indication mode, and the TCI status code points of the multiple collaborative TRPs include one of the following: uplink TCI status; downlink TCI status; uplink TCI status and downlink TCI status; wherein each of the uplink TCI states or each of the downlink TCI states is associated with a corresponding TRP; wherein the uplink TCI state corresponds to an uplink TCI status pool, and the downlink TCI state corresponds to a downlink TCI status pool.

[0040] In the above embodiment, in the communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP, the beam indication information is configured as an independent beam indication mode or predefined to only support an independent beam indication mode, which can indicate the uplink TCI state and the downlink TCI state respectively, thereby realizing the indication of the transmission beam for the uplink TRP and the downlink TRP respectively, thereby improving the accuracy of the beam indication.

[0041] In combination with some embodiments of the first aspect, in some embodiments, the uplink TCI state pool is an uplink TCI state pool independently configured through RRC signaling; the downlink TCI state pool is a downlink TCI state pool independently configured through RRC signaling, or the downlink TCI state pool is a TCI state pool shared by the downlink TCI state and the combined TCI state.

[0042] In the above embodiment, the uplink TCI status pool and the downlink TCI status pool are independently configured through RRC signaling to facilitate subsequent beam indication.

[0043] In combination with some embodiments of the first aspect, in some embodiments, the TCI status of the multiple TRPs is indicated by a first TCI status code point; the first TCI status code point is used to indicate an uplink TCI state; or, the first TCI status code point is used to indicate an uplink TCI state and a downlink TCI state; the uplink TCI state and the downlink TCI state are respectively TCI states associated with the same TRP; or, the uplink TCI state and the downlink TCI state are respectively TCI states associated with different TRPs.

[0044] In combination with some embodiments of the first aspect, in some embodiments, the terminal performs uplink transmission based on a single TRP.

[0045] In the above embodiment, when the terminal performs uplink transmission based on a single TRP, the TCI status included in a TCI status code point can be associated with different TRPs, so that the uplink TRP and downlink TRP indicate the uplink beam and downlink beam respectively.

[0046] In combination with some embodiments of the first aspect, in some embodiments, the TCI states of the multiple TRPs are indicated by a second TCI state code point; the second TCI state code point is used to indicate a downlink TCI state and at least two uplink TCI states; wherein, one uplink TCI state among the at least two uplink TCI states is associated with the downlink TCI state as the TCI state of the same TRP; or, the one downlink TCI state and the two uplink TCI states are respectively associated with the TCI states of different TRPs.

[0047] In combination with some embodiments of the first aspect, in some embodiments, the number of associated TRPs indicated by the second TCI status code point is 2 or 3, where the maximum number of TRPs used for uplink collaborative transmission is 2.

[0048] In combination with some embodiments of the first aspect, in some embodiments, the terminal performs uplink collaborative transmission based on multiple TRPs.

[0049] In the above embodiment, when the terminal performs uplink transmission based on multiple TRPs, the uplink TCI state and downlink TCI state included in a TCI state code point can be associated with different TRPs respectively, so that the uplink TRP and downlink TRP indicate the uplink beam and downlink beam respectively.

[0050] In combination with some embodiments of the first aspect, in some embodiments, the TCI status code points corresponding to the TCI status of the multiple TRPs are activated, updated or deactivated through the media access control element MAC CE.

[0051] In combination with some embodiments of the first aspect, in some embodiments, different TRPs are configured with different sounding reference signal SRS resource sets functioning as beam management; the method also includes: the terminal receives configuration information sent by the network device, and the configuration information is used to indicate the SRS resource sets corresponding to associated different TRPs.

[0052] In the above embodiment, the network device can configure different SRS resource sets for beam management for different TRPs based on the capabilities of each TRP.

[0053] In combination with some embodiments of the first aspect, in some embodiments, the beam indication information is carried in downlink control information DCI.

[0054] In the second aspect, an embodiment of the present disclosure proposes a beam indication method, which includes: a network device sends beam indication information to a terminal, wherein the beam indication information is used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; the multiple collaborative TRPs are used for the terminal to perform uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission.

[0055] In the above embodiment, in the communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP, the network device sends beam indication information for indicating the index of the TCI status code point of one or more collaborative TRPs to the terminal, so that the terminal can obtain the beam information used for transmission, thereby improving communication efficiency.

[0056] In combination with some embodiments of the second aspect, in some embodiments, the beam indication information is configured as an independent beam indication mode or is predefined to only support an independent beam indication mode, and the TCI status code points of the multiple collaborative TRPs include one of the following: uplink TCI status; downlink TCI status; uplink TCI status and downlink TCI status; wherein each of the uplink TCI states or each of the downlink TCI states is associated with a corresponding TRP; wherein the uplink TCI state corresponds to an uplink TCI status pool, and the downlink TCI state corresponds to a downlink TCI status pool.

[0057] In combination with some embodiments of the second aspect, in some embodiments, the uplink TCI state pool is an uplink TCI state pool independently configured through RRC signaling; the downlink TCI state pool is a downlink TCI state pool independently configured through RRC signaling, or the downlink TCI state pool is a TCI state pool shared by the downlink TCI state and the combined TCI state.

[0058] In combination with some embodiments of the second aspect, in some embodiments, the TCI status of the multiple TRPs is indicated by a first code point; the first TCI status code point is used to indicate an uplink TCI state; or, the first TCI status code point is used to indicate an uplink TCI state and a downlink TCI state; the uplink TCI state and the downlink TCI state are respectively TCI states associated with the same TRP; or, the uplink TCI state and the downlink TCI state are respectively TCI states associated with different TRPs.

[0059] In combination with some embodiments of the second aspect, in some embodiments, the terminal performs uplink transmission based on a single TRP.

[0060] In combination with some embodiments of the second aspect, in some embodiments, the TCI states of the multiple TRPs are indicated by a second code point; the second TCI state code point is used to indicate a downlink TCI state and at least two uplink TCI states; wherein, one uplink TCI state among the at least two uplink TCI states is associated with the downlink TCI state as the TCI state of the same TRP; or, the one downlink TCI state and the two uplink TCI states are respectively associated with the TCI states of different TRPs.

[0061] In combination with some embodiments of the second aspect, in some embodiments, the number of associated TRPs indicated by the second TCI status code point is 2 or 3, where the maximum number of TRPs used for uplink collaborative transmission is 2.

[0062] In combination with some embodiments of the second aspect, in some embodiments, the terminal performs uplink collaborative transmission based on multiple TRPs.

[0063] In combination with some embodiments of the second aspect, in some embodiments, the TCI status code points corresponding to the TCI status of the multiple TRPs are activated, updated or deactivated through the media access control element MAC CE.

[0064] In combination with some embodiments of the second aspect, in some embodiments, the method also includes: the network device configures different SRS resource sets with a beam management function based on different TRPs; the network device sends configuration information to the terminal, and the configuration information is used to indicate the SRS resource sets corresponding to different TRPs.

[0065] In combination with some embodiments of the second aspect, in some embodiments, the beam indication information is carried in downlink control information DCI.

[0066] In the third aspect, an embodiment of the present disclosure proposes a terminal, comprising: a transceiver module for receiving beam indication information sent by a network device, wherein the beam indication information is used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; the multiple collaborative TRPs are used for the terminal to perform uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission.

[0067] In the fourth aspect, an embodiment of the present disclosure proposes a network device, including: a transceiver module for sending beam indication information to a terminal, wherein the beam indication information is used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; the multiple collaborative TRPs are used for the terminal to perform uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission.

[0068] In a fifth aspect, an embodiment of the present disclosure proposes a terminal, comprising: one or more processors; wherein the processor is used to execute the beam indication method of the first aspect.

[0069] In a sixth aspect, an embodiment of the present disclosure proposes a network device, comprising: one or more processors; wherein the processor is used to execute the beam indication method of the second aspect.

[0070] In the seventh aspect, an embodiment of the present disclosure proposes a communication system, including a terminal and a network device, wherein the terminal is configured to implement the beam indication method of the first aspect, and the network device is configured to implement the beam indication method of the second aspect.

[0071] In an eighth aspect, an embodiment of the present disclosure proposes a storage medium storing instructions, wherein the storage medium is characterized in that when the instructions are executed on a communication device, the communication device executes the beam indication method of the first aspect or the second aspect.

[0072] In a ninth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation manner of the first aspect or the second aspect.

[0073] In a tenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first aspect or the second aspect.

[0074] In an eleventh aspect, an embodiment of the present disclosure provides a chip or a chip system, wherein the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first aspect or the second aspect.

[0075] It is understandable that the above-mentioned terminals, network devices, communication systems, storage media, program products, computer programs, chips, or chip systems are all used to perform the methods proposed in the embodiments of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects of the corresponding methods and will not be repeated here.

[0076] The embodiments of the present disclosure provide a beam indication method, a terminal, a network device, a communication system, and a storage medium. In some embodiments, the terms communication method and information processing method are interchangeable, and the terms information processing system and communication system are interchangeable.

[0077] The embodiments of the present disclosure are not exhaustive and are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the absence of contradiction, each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined. For example, some or all steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0078] In each embodiment of the present disclosure, unless otherwise specified or provided for by logic, the terms and / or descriptions between the embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form a new embodiment based on their inherent logical relationships.

[0079] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0080] In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular, such as "a", "an", "the", "above", "said", "the", "the", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun following the article may be understood as a singular expression or a plural expression.

[0081] In the embodiments of the present disclosure, “plurality” refers to two or more.

[0082] In some embodiments, the terms "at least one," "one or more," "a plurality of," "multiple," etc. may be used interchangeably.

[0083] In some embodiments, descriptions such as "at least one of A and B," "A and / or B," "A in one case, B in another case," or "in response to one case A, in response to another case B" may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); and in some embodiments, A and B (both A and B are executed). The above is also applicable when there are more branches such as A, B, and C.

[0084] In some embodiments, "A or B" and other descriptions may include the following technical solutions depending on the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The above is also applicable when there are more branches such as A, B, C, etc.

[0085] The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects and do not constitute any restriction on the position, order, priority, quantity or content of the description objects. For the statement of the description object, please refer to the description in the context of the claims or embodiments, and no unnecessary restriction should be constituted due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields". "First" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number and can be one or more. Taking "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes can be the same or different. For example, if the description object is "device", then the "first device" and the "second device" can be the same device or different devices, and their types can be the same or different. For another example, if the description object is "information", then the "first information" and the "second information" can be the same information or different information, and their contents can be the same or different.

[0086] In some embodiments, “including A,” “comprising A,” “used to indicate A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0087] In some embodiments, terms such as "in response to...", "in response to determining...", "in the case of...", "at the time of...", "when...", "if...", "if...", etc. can be used interchangeably.

[0088] In some embodiments, terms such as "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 less than", and "above" can be replaced with each other, and terms such as "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", and "below" can be replaced with each other.

[0089] In some embodiments, devices, etc. can be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. Terms such as "device", "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", and "subject" can be used interchangeably.

[0090] In some embodiments, "network" can be interpreted as devices included in the network (eg, access network equipment, core network equipment, etc.).

[0091] In some embodiments, the terms "access network device (AN device)", "radio access network device (RAN 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", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)" and the like may be used interchangeably.

[0092] In some embodiments, the terms "terminal", "terminal 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, etc. can be used interchangeably.

[0093] In some embodiments, the access network device, the core network device, or the network device can be replaced by a terminal. For example, the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal is replaced by communication between multiple terminals (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, it is also possible to set the structure in which the terminal has all or part of the functions of the access network device. In addition, terms such as "uplink" and "downlink" can also be replaced by terms corresponding to communication between terminals (for example, "side"). For example, uplink channels, downlink channels, etc. can be replaced by side channels, and uplinks, downlinks, etc. can be replaced by side links.

[0094] In some embodiments, the terminal may be replaced by an access network device, a core network device, or a network device. In this case, the access network device, the core network device, or the network device may have a structure that has all or part of the functions of the terminal.

[0095] In some embodiments, obtaining data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

[0096] In some embodiments, data, information, etc. may be obtained with the user's consent.

[0097] In addition, each element, each row, or each column in the table of the embodiment of the present disclosure can be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns can also be implemented as an independent embodiment.

[0098] FIG1A is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

[0099] As shown in FIG. 1A , a communication system 100 includes a terminal 101 and a network device 102 .

[0100] In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal 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 a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited thereto.

[0101] In some embodiments, the network device 102 may be a single device including a first network element, a second network element, etc., or may be a plurality of devices or a group of devices, each including all or part of the first network element, the second network element, etc. The network element may be virtual or physical. The core network may include, for example, at least one of an evolved packet core (EPC), a 5G core network (5GCN), and a next generation core (NGC).

[0102] It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure. Ordinary technicians in this field can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.

[0103] The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG1A , or a portion thereof, but are not limited thereto. The entities shown in FIG1A are illustrative only. The communication system may include all or part of the entities shown in FIG1A , or may include other entities other than those shown in FIG1A . The number and form of the entities may be arbitrary, and the entities may be physical or virtual. The connection relationships between the entities are illustrative only. The entities may be connected or disconnected, and the connection may be in any manner, including direct or indirect, wired or wireless.

[0104] The embodiments of the present disclosure can be applied to 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 new radio (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 (registered trademark), Public Land Mobile Network (PLMN) networks, Device-to-Device (D2D) systems, Machine-to-Machine (M2M) systems, Internet of Things (IoT) systems, Vehicle-to-Everything (V2X), systems utilizing other communication methods, and next-generation systems based on and extending these methods. Furthermore, multiple systems may be combined (for example, a combination of LTE or LTE-A with 5G).

[0105] In NR systems, multi-point collaboration is a key technical approach to improve cell edge coverage and provide more balanced service quality within the service area. From a network perspective, deploying a large number of distributed access points with centralized baseband processing is more conducive to providing a balanced user experience rate and significantly reducing handover latency and signaling overhead. As frequency bands increase, a relatively denser deployment of access points is required to ensure network coverage. In high-frequency bands, with the increasing integration of active antenna equipment, modular active antenna arrays are becoming increasingly popular. Each TRP's antenna array can be divided into several relatively independent antenna panels, allowing the overall array configuration and port count to be flexibly adjusted based on deployment scenarios and service requirements. Antenna panels or TRPs can also be connected by optical fiber, enabling more flexible distributed deployment. In the millimeter wave band, as wavelengths decrease, the obstruction effect caused by obstacles such as people or vehicles becomes more significant. To ensure link robustness, collaboration between multiple TRPs or panels can be leveraged to transmit / receive from multiple beams at multiple angles, thereby mitigating the adverse effects of obstruction.

[0106] Based on the mapping of transmitted signal streams to multiple TRPs / panels, coordinated multi-point transmission technology can be categorized as coherent or incoherent. In coherent transmission, each data layer is mapped to multiple TRPs / panels using a weighted vector; in incoherent transmission, each data stream is mapped to only a subset of TRPs / panels. Coherent transmission places higher demands on synchronization between transmission points and the transmission capacity of the backhaul link, making it more sensitive to many non-ideal factors in real-world deployment conditions. In contrast, incoherent transmission is less susceptible to these factors and is therefore a key consideration for multi-point transmission technology. The uplink PUSCH (Physical Uplink Shared Channel) is transmitted in the TRP direction of multiple base stations. R17 proposes collaborative transmission under the TDM (Time-Division Multiplexing) transmission mode. Different repetitions of the same information on the PUSCH are sent to different TRPs of the base station through different transmission occasions (TO) in the time domain. This method has relatively low requirements on terminal capabilities. Each TO only needs to send PUSCH / PUCCH in the direction of one TRP. It does not require the ability to support simultaneous beam transmission, and the transmission delay is relatively large.

[0107] For the uplink, the spatial characteristics of the channels actually passed through by PUSCH channels facing different TRPs may be very different. Therefore, it is believed that the QCL-D (Quasi-Colocation) of PUSCH channels in different sending directions is different.

[0108] In R18, it is proposed to increase the reliability and throughput of transmission by realizing simultaneous collaborative transmission in the TRP direction of multiple base stations through multiple terminal panels (panels). At the same time, it can effectively reduce the transmission delay under multiple TRPs, but it requires the terminal to have the ability to send multiple beams simultaneously.

[0109] FIG1B is a schematic diagram of multi-PANEL / TRP transmission based on a single PDCCH scheduling, and FIG1C is a schematic diagram of multi-PANEL / TRP transmission based on different PDCCH scheduling.

[0110] As shown in Figure 1B, the transmission of PUSCH can be based on a single PDCCH (physical downlink control channel), that is, a multi-PANEL / TRP transmission scheduled by S-DCI (single DCI (downlink control information)). Specifically, the UE can interact with multiple TRPs (e.g., TRP1 and TRP) based on one or more data layers (One or more Layers) and multiple TPMIs (Transmitted Precoding Matrix Indicator) (e.g., TPMI1 and TPMI2) through multiple Panels (e.g., Panel1 and Panel2).

[0111] As shown in Figure 1C, PUSCH transmission can also be based on multiple panels / TRPs scheduled by different PDCCHs, namely M-DCI (multi-DCI). Specifically, the UE can interact with multiple panels and multiple TRPs. For example, the UE interacts with Panel 1 and TRP 1 based on PDCCH 1 and PUSCH 1, and the UE interacts with Panel 2 and TRP 2 based on PDCCH 2 and PUSCH 2.

[0112] In actual deployments, the links between transmission points may be relatively ideal backhaul links that support high throughput and very low backhaul latency, or they may be non-ideal backhaul links using methods such as xDSL, microwave, and relay. The M-DCI-based NC-JT transmission solution was introduced for non-ideal backhaul situations, but this solution can also be used in ideal backhaul situations.

[0113] The terminal can be configured with multiple physical panels, and the capabilities of different panels can be different. For example, different panels have different numbers of SRS (sounding reference signal) ports and support different maximum numbers of data transmission layers. For example, one panel supports a maximum of 2 layers of transmission, and another panel supports a maximum of 4 layers of transmission. The network device will determine whether the terminal is currently suitable for simultaneous uplink transmission of multiple panels. If the terminal is currently suitable for simultaneous uplink transmission of multiple panels, the network device will directly or indirectly indicate the relevant transmission parameters, including the terminal's specific beam indication information, the number of data layers used for transmission, the allocation of DMRS (Demodulation Reference Signal) ports used, and precoding indication information.

[0114] The transmission schemes supported by uplink simultaneous transmission STxMP (Simultaneous transmission via multi-panel) for PUSCH based on S-DCI may include: SDM (Space Division Multiplexing) space division multiplexing scheme and SFN (Single Frequency Network) space division multiplexing scheme.

[0115] FIG1D is a schematic diagram of transmission based on the SDM space division multiplexing scheme, and FIG1E is a schematic diagram of transmission based on the SDM space division multiplexing scheme.

[0116] As shown in Figure 1D, the SDM spatial division multiplexing scheme is: different parts of a TB (Transmission Block) of PUSCH are sent to two different TRPs on the same time-frequency resources through their corresponding DMRS ports or port combinations allocated on different panels. Different panels / TRPs / transmission opportunities (TOs) are associated with different TCI (Transmission Configuration Indicator) states, that is, beams.

[0117] As shown in Figure 1E, the SFN spatial division multiplexing scheme is as follows: one TB of the PUSCH is transmitted on the same time-frequency resources to two different TRPs through the same DMRS port or port combination allocated on different panels. Different panels / TRPs / transmission opportunities (TOs) are associated with different TCI states, that is, beams.

[0118] The following describes the TCI status.

[0119] Downlink beam indication can be accomplished by indicating the TCI state to the user. A downlink reference signal is associated with the TCI state, and the user will use the same receiving beam as the reference signal to receive data or control information. The beams of each uplink channel or signal are achieved by indicating spatial relationship information (Spatial Ration information) or SRI to the UE. The user uses the same beam as the reference signal associated with the spatial information or the SRS corresponding to the SRI to send uplink data. Due to the differences in uplink and downlink beam management mechanisms, different parameter information needs to be configured for uplink and downlink beam management, such as the TCI state of the downlink beam indication and the spatial relationship information of the uplink beam indication. The unified TCI framework is designed for uplink beam management and downlink beam management, which can reduce signaling overhead and increase the flexibility of beam management.

[0120] In the unified TCI framework for uplink and downlink, two mechanisms, joint DL / UL beam indication and separate DL / UL beam indication, are available for beam indication. Because FR2 (high frequency band) terminals must support beam correspondence, and generally, the optimal downlink receive beam is also the optimal uplink transmit beam, joint beam indication can be used to indicate a joint TCI state to the user. The associated reference signal indicating QCL Type D information is used to determine both the downlink and uplink transmit beams. However, there are special cases where the optimal downlink beam cannot be considered equal. In the unified TCI framework for uplink and downlink, two mechanisms, joint DL / UL beam indication and separate DL / UL beam indication, are designed for beam indication. These mechanisms are similar to those for uplink transmit beams, such as when MPE or network flexibility is a consideration. In these cases, separate beam indication is used to indicate the downlink and uplink transmit beams to the user, respectively.

[0121] Taking into account the flexibility and complexity of beam information configuration and indication, NR has designed a multi-layer beam indication method, which can be used in the Unified TCI state, that is, indication through RRC (Radio Resource Control) + MAC-CE (Media Access Control-Control Element) + DCI (Downlink Control Information).

[0122] The RRC configuration / reconfiguration reference signal index set constitutes an optional TCI state resource pool used to describe beam characteristics. For uplink data channels, the maximum number of supported TCI states is 64, and for downlink data channels, the maximum number of supported TCI states is 128.

[0123] Among them, MAC-CE signaling is used to activate / deactivate the TCI state, and the activated reference signal index will be dynamically combined and configured into the associated TCI or reference signal set.

[0124] A TCI status indication field in the DL DCI signaling is used to indicate a TCI status code point, and a maximum of eight TCI status code points can be selected.

[0125] In the Unified TCI state, the downlink TCI state or joint TCI state indicated for the UE is used to determine the downlink transmission beam, and the indicated uplink TCI state or joint TCI state is used to determine the uplink beam. Here, the downlink beam refers to the user-specific PDSCH and the beam of all / part of the PDCCH in a CC. The uplink beam refers to the uplink transmit spatial filter of the PUSCH based on dynamic grant / configurable grant and all or part of the dedicated PUCCH resources of a CC.

[0126] A single TCI state pool can be used for both the downlink TCI state and the joint TCI state in independent beam indication. For joint beam indication, the TCI field only needs to indicate a single joint TCI state, which is used to determine both the uplink and downlink transmission beams. However, with independent beam indication, the downlink and uplink transmission beams are no longer identical and require separate indications. Furthermore, there are three scenarios: requiring simultaneous indication of downlink and uplink transmission beams for a user, requiring indication of only the downlink transmission beam, or requiring indication of only the uplink transmission beam.

[0127] To this end, in the case of independent beam indication, the mapping relationship between the TCI field and TCI status in DCI formats 1_1 / 1_2 is as follows:

[0128] One code point in the TCI field can correspond to both a downlink TCI state and an uplink TCI state;

[0129] One code point in the TCI field corresponds to only one downlink TCI state. In this case, the user maintains the current UL TCI state.

[0130] One code point in the TCI field corresponds to only one uplink TCI state. At this time, the user maintains the current DL TCI state unchanged.

[0131] To improve the reliability of DCI beam indication, a HARQ-ACK feedback mechanism can be designed for DCI. When using DCI format 1_1 / 1_2 with downlink scheduling information for beam indication, the ACK / NACK feedback information on whether the beam indication information is successfully decoded will be included in the ACK / NACK feedback of the scheduled PDSCH.

[0132] When using DCI format 1_1 / 1_2 without downlink scheduling information for beam indication, in order to simplify the design of the feedback mechanism, the ACK / NACK feedback mechanism during the release of SPS (Semi-Persistent Scheduling) PDSCH can be multiplexed, and both Type 1 and Type 2 HARQ (Hybrid Automatic Repeat reQuest)-ACK codebooks can be supported to inform the base station whether the beam indication information is successfully decoded. To this end, it is required that the CRC of DCI format 1_1 / 1_2 without scheduling information also needs to be scrambled with CS-RNTI during beam indication. In addition, in order to distinguish whether the DCI is used for beam indication or SPS PDSCH release, it is stipulated that when used for beam indication, some fields of the DCI are configured as follows, as shown in Table 1.

[0133] Table 1 Beam indication DCI field configuration method

[0134] FIG1F is a schematic diagram of MAC CE signaling for unified TCI state activation / deactivation.

[0135] As shown in Figure 1F, the unified TCI state activation / deactivation MAC CE is identified by a MAC subheader with an eLCID. It is of variable size and consists of the following fields:

[0136] Serving Cell ID: This field indicates the identity of the serving cell to which the MAC CE applies. The length of this field is 5 bits. If the indicated serving cell is configured as part of simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3 or simultaneousU-TCI-UpdateList4 indicated in TS 38.331, this MAC CE applies to all serving cells in the set simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3 or simultaneousU-TCI-UpdateList4 respectively;

[0137] DL BWP ID: This field indicates that the MAC CE is applicable to the DL BWP as the code point of the DCI bandwidth part indication field specified in TS 38.212; the length of the BWP ID field is 2 bits;

[0138] UL BWP ID: This field indicates that the MAC CE is applicable to the UL BWP as the code point of the DCI bandwidth part indication field specified in TS 38.212. If the value of unifiedTCI-StateTvpe in the serving cell indicated by the serving cell ID is joint, this field is considered to be reserved. The BWP ID field length is 2 bits;

[0139] P i :This field indicates whether each TCI code point is in multiple TCI states or single TCI state. If P i The field is set to 1, indicating that the i-th TCI code point includes DL TCI state and UL TCI state; if P i If the field is set to 0, it means that the i-th TCI code point contains only DL / joint TCI state or UL TCI state; the code point to which the TCI state is mapped is determined by its ordinal position in all TCI state ID fields;

[0140] D / U: This field indicates whether the TCI status ID of the same byte is joint / DL or ULTCI status; if this field is set to 1, the TCI status ID in the same byte is joint / DL; if this field is set to 0, it indicates that the TCI status ID in the same byte is UL;

[0141] TCI state ID: TCI state identifier, identified by TCI-StateId in TS 38.331; if D / U is set to 1, the 7-bit TCI state ID is used, that is, TCI-StateId specified in TS 38.331; if D / U is set to 0, the highest bit of the TCI state ID is considered reserved, and the remaining 6 bits represent TCI-UL-State-Id specified in TS 38.331; a maximum of 16 TCI states can be activated;

[0142] R: Reserved bit, set to 0.

[0143] Among them, Oct represents byte.

[0144] FIG1G is a schematic diagram of MAC CE signaling for joint / independent TCI state activation / deactivation in an MTRP scenario.

[0145] As shown in Figure 1G , the enhanced unified TCI state activation / deactivation MAC CE for the joint TCI state is identified by a MAC subheader with an eLCID. It is of variable size and consists of the following fields:

[0146] Serving Cell ID: This field indicates the identity of the serving cell to which the MAC CE applies. The length of this field is 5 bits. If the indicated serving cell is configured as part of simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3 or simultaneousU-TCI-UpdateList4 indicated in TS 38.331, this MAC CE applies to all serving cells in the set simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3 or simultaneousU-TCI-UpdateList4 respectively;

[0147] DL BWP ID: This field indicates that the MAC CE is applicable to the DL BWP as the code point of the DCI bandwidth part indication field specified in TS 38.212; the length of the BWP ID field is 2 bits;

[0148] F i,j : This field indicates whether the TCI State ID field associated with code point i of the DCI Transmission Configuration Indication field has the jth joint TCI state, where j = 1, 2; if F i,jThe field is set to 1, indicating that there is a j-th joint TCI state for code point i; if F i,j If the field is set to 0, it indicates that the jth joint TCI state of code point i is missing; the code point to which the TCI state is mapped is determined by its ordinal position in all TCI state ID fields;

[0149] TCI state ID: This field indicates the 7-bit TCI state ID, which is identified by TCI-StateId in TS 38.331. There are a maximum of 16 active TCI states.

[0150] R: Reserved bit, set to 0.

[0151] FIG1H is a schematic diagram of MAC CE signaling for independent TCI state activation / deactivation.

[0152] As shown in Figure 1H, the enhanced unified TCI state activation / deactivation MAC CE for independent TCI states is identified by a MAC subheader with an eLCID. It is of variable size and consists of the following fields:

[0153] Serving Cell ID: This field indicates the identity of the serving cell to which the MAC CE applies. The length of this field is 5 bits. If the indicated serving cell is configured as part of simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3 or simultaneousU-TCI-UpdateList4 indicated in TS 38.331, this MAC CE applies to all serving cells in the set simultaneousU-TCI-UpdateList1, simultaneousU-TCI-UpdateList2, simultaneousU-TCI-UpdateList3 or simultaneousU-TCI-UpdateList4 respectively;

[0154] DL BWP ID: This field indicates that the MAC CE is applicable to the DL BWP as the code point of the DCI bandwidth part indication field specified in TS 38.212; the length of the BWP ID field is 2 bits;

[0155] UL BWP ID: This field indicates that the MAC CE is applicable to the UL BWP as the code point of the DCI bandwidth part indication field specified in TS 38.212. The BWP ID field length is 2 bits;

[0156] F i,j: This field indicates whether the TCI State ID field associated with code point i of the DCI Transmission Configuration Indication field has the jth downlink TCI state, where j = 1, 2; if F i,j If the field is set to 1, it indicates that there is a j-th downlink TCI state for code point i; if F i,j If the field is set to 0, it means that the jth downlink TCI status of code point i is missing;

[0157] S i,j : This field indicates whether the TCI State ID field associated with code point i of the DCI Transmission Configuration Indication field has the jth uplink TCI state, where j = 1, 2; if S i,j If the field is set to 1, it indicates that there is a j-th uplink TCI state for code point i; if S i,j If the field is set to 0, it means that the jth uplink TCI status of code point i is missing;

[0158] TCI state ID: TCI state identifier, identified by TCI-StateId in TS 38.331; if the indicated TCI state ID is DL TCI state, the length of TCI state ID is 7 bits, that is, it is used in accordance with TCI-StateId specified in TS38.331; if the indicated TCI state ID is UL TCI state, the highest bit of TCI state ID is reserved, and the remaining 6 bits represent TCI-UL-State-Id specified in TS 38.331; TCI state ID is in accordance with F i,j and S i,j The fields are arranged in the indicated order, and the maximum number of activated TCI states is 32;

[0159] R: Reserved bit, set to 0.

[0160] In a multi-TRP deployment scenario with downlink STRP / uplink MTRP, deploying multiple uplink reception points (RTRPs) reduces network deployment costs, improves uplink coverage and throughput, and avoids complex network planning and downlink interference management coordination issues. Asymmetric multi-TRP transmission (single downlink TRP / multiple uplink TRPs) is implemented in heterogeneous networks to improve UL coverage and throughput. Because the macro gNB and micro node UL TRPs have different power ratings, UEs can receive DL transmissions from the macro gNB but route UL transmissions to the macro gNB or non-co-located micro node UL TRPs to maximize UL throughput. As an option to further reduce energy consumption, micro nodes can reduce or even disable DL transmissions. Unlike small cells, they can be used solely for uplink reception.

[0161] FIG. 1I is a schematic diagram of the cell node functions in a macro cell, and FIG. 1J is a schematic diagram of the cell node functions in a communication scenario with multiple uplink receiving points.

[0162] As shown in Figure 1I, in a macro cell, the UE performs uplink and downlink transmissions with the base station. The base station is used for both sending and receiving downlink data. As shown in Figure 1J, in a communication scenario with multiple uplink receiving points, the base station sends downlink data to the UE, and the UE can transmit the uplink data to a UL receiver point (uplink receiving node), which is used only for receiving uplink data.

[0163] Figure 1K is a schematic diagram of a communication scenario with single downlink TRP transmission and multiple uplink TRP transmission.

[0164] As shown in Figure 1K, the gNB is used to send downlink data to multiple UEs and receive uplink data sent by the UEs. The UL-TRP is only used to receive uplink data sent by the UE. The gNB and the UL Rx Node can be connected by a backhaul link, which can be an ideal backhaul situation.

[0165] The communication scenario shown in FIG. 1K may be referred to as a UL-only scenario.

[0166] In UL-only scenarios, a cell includes a master gNB and multiple UL Transmitted Reception Points (TRPs). To enable downlink STRP / MTRP transmission, the network equipment must perform uplink / downlink beam management and ultimately indicate the beam information used for data / signal transmission to the terminal via the existing RRC+MAC-CE+DCI configuration method. Uplink MTRP transmission can be coordinated between the master gNB and the UL TRP, or between different UL TRPs.

[0167] In the transmission scenario of downlink STRP / uplink MTRP transmission, the corresponding UL (uplink) transmission scheme can be:

[0168] For uplink STRP transmission: you can select macro gNB, or you can select a specific UL TRP;

[0169] For uplink MTRP transmission, you can select macro gNB and one UL TRP, or select two UL TRPs, or select macro gNB and two of the UL TRPs.

[0170] In the UL-only scenario, a cell may include one master gNB and multiple UL TRP reception points.

[0171] The embodiment of the present disclosure provides a beam indication method, in which a terminal receives beam indication information sent by a network device, and the beam indication information is used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; multiple collaborative TRPs are used for uplink transmission and / or downlink transmission by the terminal, and include a TRP dedicated to uplink transmission. Based on the beam indication method provided by the embodiment of the present disclosure, in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP, the network device sends beam indication information for indicating the index of the TCI status code point of one or more collaborative TRPs to the terminal, so that the terminal can obtain beam information for transmission, thereby improving communication efficiency.

[0172] FIG2 is an interactive diagram of a beam indication method according to an embodiment of the present disclosure. As shown in FIG2 , an embodiment of the present disclosure relates to a beam indication method, which includes:

[0173] Step S2101: The network device sends configuration information to the terminal.

[0174] In some embodiments, the terminal receives configuration information sent by the network device.

[0175] In some embodiments, the network device may configure different sets of SRS resources for beam management for different TRPs.

[0176] In some embodiments, the network device may configure a different SRS resource set for each uplink reception point, where each SRS resource set includes one or more SRS resources.

[0177] In some embodiments, the configuration information is used to indicate the SRS resource sets corresponding to associated different TRPs.

[0178] In some embodiments, the network device informs the terminal of the SRS resource set corresponding to each TRP through configuration information.

[0179] In some embodiments, the configuration information is carried in RRC signaling.

[0180] In some embodiments, the network device may independently configure the uplink TCI state pool (UL TCI state pool) and the downlink TCI state pool (DL TCI state pool) through RRC signaling.

[0181] In some embodiments, the network device may also independently configure an uplink TCI state pool and configure a common TCI state pool for the downlink TCI state and the joint TCI state.

[0182] Step S2102: The network device sends beam indication information to the terminal.

[0183] In some embodiments, the beam indication information is used to indicate the index of the TCI state code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP.

[0184] Among them, the communication scenario of the downlink single transmission node S-TRP and the uplink multiple transmission node M-TRP refers to that one TRP among multiple TRPs is used for downlink transmission, and at least two TRPs among multiple TRPs are used for uplink transmission; wherein, the TRP used for downlink transmission can be one of the TRPs used for uplink transmission, that is, the same TRP is used for both uplink transmission and downlink transmission; or, the TRP used for downlink transmission and the TRP used for uplink transmission are different TRPs.

[0185] In some embodiments, multiple collaborative TRPs are used for the terminal to perform uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission.

[0186] Among them, the TRP dedicated to uplink transmission refers to the TRP used only for uplink transmission and not for downlink transmission.

[0187] In some embodiments, the beam indication information is carried in DCI.

[0188] It should be noted that the communication scenarios of the above-mentioned downlink single transmission node S-TRP and uplink multiple transmission nodes M-TRP refer to the communication scenarios in which these TRPs are deployed in the terminal. In each actual communication transmission, there is no limit on the number of downlink TRPs and uplink TRPs participating in each communication. In other words, in an actual communication transmission, only one TRP can be used for uplink transmission.

[0189] In some embodiments, the terminal performs uplink transmission based on a single TRP, or the terminal performs uplink collaborative transmission based on multiple TRPs.

[0190] In some embodiments, the beam indication information is configured as a separate beam indication mode or is predefined to only support the separate beam indication mode.

[0191] In some embodiments, in the independent beam indication mode, the TCI status code points of the multiple coordinated TRPs indicated by the beam indication information may include one of the following:

[0192] Uplink TCI status;

[0193] Downlink TCI status;

[0194] Uplink TCI status and downlink TCI status.

[0195] For example, a TCI status code point may include only the uplink TCI status, only the downlink TCI status, or both the uplink TCI status and the downlink TCI status.

[0196] In some embodiments, each uplink TCI state or each downlink TCI state is associated with a corresponding TRP.

[0197] In some embodiments, an uplink TCI state corresponds to an uplink TCI state pool, and a downlink TCI state corresponds to a downlink TCI state pool.

[0198] In some embodiments, the uplink TCI status pool is an uplink TCI status pool independently configured through RRC signaling.

[0199] In some embodiments, the downlink TCI state pool is a downlink TCI state pool independently configured through RRC signaling, or the downlink TCI state pool is a TCI state pool shared by the downlink TCI state and the joint TCI state.

[0200] In some embodiments, the TCI status code point corresponding to the uplink transmission of the terminal based on a single TRP can be called the first TCI status code point.

[0201] In some embodiments, the TCI status of multiple TRPs is indicated by a first TCI status code point.

[0202] The first TCI state code point is used to indicate an uplink TCI state; or, the first TCI state code point is used to indicate an uplink TCI state and a downlink TCI state.

[0203] An uplink TCI state and a downlink TCI state are TCI states associated with the same TRP; or, an uplink TCI state and a downlink TCI state are TCI states associated with different TRPs.

[0204] That is, the first TCI state code point can indicate only an uplink TCI state, or it can indicate an uplink TCI state and a downlink TCI state at the same time; when the first TCI state code point indicates an uplink TCI state and a downlink TCI state, the uplink TCI state and the downlink TCI state can be associated with the same TRP, or they can be associated with different TRPs; when the uplink TCI state and the downlink TCI state are associated with the same TRP, it corresponds to the scenario of using the same TRP for uplink transmission and downlink transmission; when the uplink TCI state and the downlink TCI state are associated with different TRPs, it corresponds to the scenario of using different TRPs for uplink transmission and downlink transmission respectively.

[0205] For example, the downlink TCI state is associated with the macro gNB, and the uplink TCI state is associated with the UL TRP.

[0206] For example, for the TCI states associated with the two configured cooperative TRPs, TRP1 (DL TCI1, UL TCI1) and TRP2 (DL TCI2, UL TCI2), the supported TCI code points may include combinations similar to the following:

[0207] (1)DL TCI1, UL TCI1;

[0208] (2)DL TCI1, UL TCI2.

[0209] In some embodiments, the TCI status code point corresponding to the uplink transmission of the terminal based on multiple TRPs can be called the second TCI status code point.

[0210] In some embodiments, the TCI status of multiple TRPs is indicated by a second TCI status code point.

[0211] In some embodiments, the second TCI state code point is used to indicate one downlink TCI state (DL TCI state) and at least two uplink TCI states (UL TCI states).

[0212] Among them, one uplink TCI state of at least two uplink TCI states is associated with the downlink TCI state as the TCI state of the same TRP; or, one downlink TCI state and two uplink TCI states are respectively associated with the TCI states of different TRPs.

[0213] Taking the TCI state code points including uplink TCI state1, uplink TCI state2, and downlink TCI state1 as an example: uplink TCI state1, uplink TCI state2, and downlink TCI state1 can be associated with 3 different TRPs respectively; or, uplink TCI state1 and downlink TCI state1 are associated with the same TRP, and uplink TCI state2 is associated with another TRP.

[0214] When the terminal performs uplink transmission based on multiple TRPs, the TCI status included in the TCI status code point must be extended to at least 3 TRPs, that is, the parameter F in the TCI status code point i,j and parameter S i,j The value of j is 1, 2 or 3, that is, j = 1, 2, 3.

[0215] When the TCI state code point indicates both downlink and uplink beams, the number of indicated TRPs needs to be extended to at least 3. For example, the TCI states associated with the three coordinated TRPs are: TRP1 (DL TCI1, UL TCI1), TRP2 (DL TCI2, UL TCI2), TRP3 (DL TCI3, UL TCI3), and the supported TCI code points include combinations similar to the following:

[0216] (1)DL TCI1, UL TCI1, UL TCI2;

[0217] (2)DL TCI1, UL TCI2, UL TCI3.

[0218] In some embodiments, the MAC-CE that currently supports activation and deactivation of 8 code points may be used; the number of TCI code points of the MAC-CE may also be expanded, for example, to 16 code points.

[0219] In some embodiments, the number of associated TRPs indicated by the second TCI status code point is 2 or 3, where the maximum number of TRPs used for uplink collaborative transmission is 2.

[0220] In some embodiments, the maximum number of uplink cooperative transmission nodes, that is, the maximum number of UL TCI states configured simultaneously, may be 2.

[0221] In some embodiments, the number of uplink cooperative transmission nodes may be considered to be expanded to a maximum of 3, that is, j=1, 2, 3, 4, corresponding to 3 UL TCI indication situations.

[0222] The beam indication method provided in the embodiments of the present disclosure may be applicable to S-DCI-based MTRP or M-DCI-based MTRP transmission, but is not limited thereto.

[0223] The beam indication method provided by the embodiment of the present disclosure is that, in a UL-only scenario, the network device sends beam indication information for indicating the index of the TCI status code point of one or more collaborative TRPs to the terminal. The beam indication information is used to indicate the TCI status code point in the case of a single uplink TRP or multiple uplink TRPs, so that the terminal can obtain the beam information for transmission in the communication scenario, thereby improving communication efficiency.

[0224] The communication method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2102. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, and steps S2101+S2102 may be implemented as independent embodiments, but are not limited thereto.

[0225] In some embodiments, step S2101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0226] In some embodiments, the names of information, etc. are not limited to the names described in the embodiments, and terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codeword", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0227] In some embodiments, terms such as "moment", "time point", "time", and "time position" can be replaced with each other, and terms such as "duration", "period", "time window", "window", and "time" can be replaced with each other.

[0228] In some embodiments, "obtain", "get", "get", "receive", "transmit", "bidirectional transmission", "send and / or receive" can be interchangeable, and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining by self-processing, autonomous implementation, etc.

[0229] In some embodiments, terms such as "send", "transmit", "report", "download", "transmit", "bidirectional transmission", "send and / or receive" can be used interchangeably.

[0230] In some embodiments, terms such as "certain", "preset", "preset", "setting", "indicated", "a certain", "any", and "first" can be interchangeable. "Specific A", "preset A", "preset A", "setting A", "indicated A", "a certain A", "any A", and "first A" can be interpreted as A pre-specified in a protocol, etc., or as A obtained through setting, configuration, or indication, etc., or as specific A, a certain A, any A, or first A, etc., but not limited to this.

[0231] In some embodiments, the determination or judgment can be performed by a value represented by 1 bit (0 or 1), or by a true or false value (Boolean value) represented by true or false, or by comparison of numerical values ​​(for example, comparison with a predetermined value), but is not limited thereto.

[0232] In some embodiments, "not expecting to receive" can be interpreted as not receiving on time domain resources and / or frequency domain resources, or as not performing subsequent processing on the data after receiving it; "not expecting to send" can be interpreted as not sending, or as sending but not expecting the recipient to respond to the content sent.

[0233] In some embodiments, reference may be made to other optional implementations described before or after the description corresponding to FIG. 2 .

[0234] FIG3 is a flow chart of a beam indication method according to an embodiment of the present disclosure. As shown in FIG3 , the embodiment of the present disclosure relates to a beam indication method, which includes:

[0235] Step S3101, obtain configuration information.

[0236] The optional implementation of step S3101 can be found in step S2101 of FIG. 2 and other related parts of the embodiment involved in FIG. 2 , which will not be described in detail here.

[0237] In some embodiments, the terminal receives configuration information sent by the network device, but is not limited thereto and may also receive configuration information sent by other entities.

[0238] Step S3102: Obtain beam indication information.

[0239] The optional implementation of step S3102 can be found in step S2102 of FIG. 2 and other related parts of the embodiment involved in FIG. 2 , which will not be described in detail here.

[0240] In some embodiments, the terminal receives beam indication information sent by a network device, but is not limited thereto, and may also receive indication information sent by other entities.

[0241] The communication method involved in the embodiments of the present disclosure may include at least one of steps S3101 and S3102. For example, step S3101 may be implemented as an independent embodiment, step S3102 may be implemented as an independent embodiment, and steps S3101+S3102 may be implemented as independent embodiments, but are not limited thereto.

[0242] In some embodiments, step S3101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0243] FIG4 is a flow chart of a beam indication method according to an embodiment of the present disclosure. As shown in FIG4 , the embodiment of the present disclosure relates to a beam indication method, which includes:

[0244] Step S4101, sending configuration information.

[0245] The optional implementation of step S4101 can be found in step S2101 of FIG. 2 and other related parts of the embodiment involved in FIG. 2 , which will not be described in detail here.

[0246] In some embodiments, the network device sends configuration information to the terminal.

[0247] Step S4102: Send beam indication information.

[0248] The optional implementation of step S4102 can be found in step S2102 of FIG. 2 and other related parts of the embodiment involved in FIG. 2 , which will not be described in detail here.

[0249] In some embodiments, the network device sends beam indication information to the terminal.

[0250] The communication method involved in the embodiments of the present disclosure may include at least one of steps S4101 and S4102. For example, step S4101 may be implemented as an independent embodiment, step S4102 may be implemented as an independent embodiment, and steps S4101+S4102 may be implemented as independent embodiments, but are not limited thereto.

[0251] In some embodiments, step S4101 is optional, and one or more of these steps may be omitted or replaced in different embodiments.

[0252] FIG5 is an interactive diagram of a beam indication method according to an embodiment of the present disclosure. As shown in FIG5 , an embodiment of the present disclosure relates to a beam indication method, which includes:

[0253] Step S5101: The network device sends beam indication information to the terminal.

[0254] The optional implementation of step S5101 can refer to the optional implementation of step S2102 in Figure 2, step S3102 in Figure 3, step S4102 in Figure 4, and other related parts in the embodiments involved in Figures 2, 3, and 4, which will not be repeated here.

[0255] In some embodiments, the above method may include the methods of the above embodiments of the communication system side, terminal side, network device side, etc., which will not be repeated here.

[0256] In the embodiments of the present disclosure, some or all of the steps and their optional implementations may be arbitrarily combined with some or all of the steps in other embodiments, or may be arbitrarily combined with the optional implementations of other embodiments.

[0257] The embodiments of the present disclosure further provide an apparatus for implementing any of the above methods. For example, an apparatus is provided, comprising units or modules for implementing each step performed by a terminal in any of the above methods. For another example, another apparatus is provided, comprising units or modules for implementing each step performed by a network device (e.g., an access network device, a core network function node, a core network device, etc.) in any of the above methods.

[0258] It should be understood that the division of the various units or modules in the above device is merely a division of logical functions. In actual implementation, they may be fully or partially integrated into a physical entity, or they may be physically separated. In addition, the units or modules in the device may be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and the memory stores instructions. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the various units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory within the device or a memory outside the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits, and the functions of some or all of the units or modules can be realized by designing the hardware circuits. The above-mentioned hardware circuits can be understood as one or more processors; for example, in one implementation, the above-mentioned hardware circuit is an application-specific integrated circuit (ASIC), which realizes the functions of some or all of the above units or modules by designing the logical relationship of the components in the circuit; for example, in another implementation, the above-mentioned hardware circuit can be realized by a programmable logic device (PLD). 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 configuring the configuration file, thereby realizing the functions of some or all of the above units or modules. All units or modules of the above devices can be realized in the form of software called by the processor, or in the form of hardware circuits, or in part by the form of software called by the processor, and the rest by hardware circuits.

[0259] In the embodiments of the present disclosure, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction reading and execution capabilities, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which can be understood as a microprocessor), or a digital signal processor (DSP). In another implementation, the processor can implement certain functions through the logical relationship of the hardware circuit. The logical relationship of the above-mentioned hardware circuit is fixed or reconfigurable. 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 a reconfigurable hardware circuit, the process of the processor loading a configuration document and implementing the hardware circuit configuration can be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit 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), etc.

[0260] Figure 6A is a schematic diagram of the structure of a terminal according to an embodiment of the present disclosure. As shown in Figure 6A, terminal 6100 may include a transceiver module 6101. In some embodiments, transceiver module 6101 is configured to receive beam indication information transmitted by a network device. Optionally, the processing module is configured to perform at least one of the processing steps (e.g., but not limited to, steps S2101 and S2102) performed by the terminal in any of the above methods, and will not be further described here.

[0261] Figure 6B is a schematic diagram of the structure of a network device according to an embodiment of the present disclosure. As shown in Figure 6B, network device 6200 may include a transceiver module 6201. In some embodiments, transceiver module 6201 is configured to transmit beam indication information to a terminal. Optionally, the transceiver module is configured to perform at least one of the steps (e.g., but not limited to, steps S2101 and S2102) performed by the network device in any of the above methods, and will not be further described here.

[0262] In some embodiments, the module may be a single module or may include multiple submodules. Optionally, the multiple submodules each execute all or part of the steps required to be executed by the processing module. Optionally, the processing module may be interchangeable with the processor.

[0263] Figure 7A is a schematic diagram of the structure of a communication device 7100 proposed in an embodiment of the present disclosure. Communication device 7100 can be a network device (e.g., an access network device, a core network device, etc.), a terminal (e.g., a user equipment, etc.), a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. Communication device 7100 can be used to implement the methods described in the above method embodiments. For details, please refer to the description of the above method embodiments.

[0264] As shown in Figure 7A, the communication device 7100 includes one or more processors 7101. The processor 7101 can be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor can be used to process the communication protocol 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 program data. Optionally, the communication device 7100 is used to perform any of the above methods. Optionally, one or more processors 7101 are used to call instructions to enable the communication device 7100 to perform any of the above methods.

[0265] In some embodiments, the communication device 7100 further includes one or more transceivers 7102. When the communication device 7100 includes one or more transceivers 7102, the transceiver 7102 performs at least one of the communication steps such as sending and / or receiving in the above method (for example, step S2101 and step S2102, but not limited thereto), and the processor 7101 performs at least one of the other steps (but not limited thereto). In an optional embodiment, the transceiver may include a receiver and / or a transmitter, and the receiver and transmitter may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, and interface may be interchangeable, the terms transmitter, transmitting unit, transmitter, and transmitting circuit may be interchangeable, and the terms receiver, receiving unit, receiver, and receiving circuit may be interchangeable.

[0266] In some embodiments, the communication device 7100 further includes one or more memories 7103 for storing data. Alternatively, all or part of the memories 7103 may be located outside the communication device 7100. In alternative embodiments, the communication device 7100 may include one or more interface circuits 7104. Optionally, the interface circuits 7104 are connected to the memories 7103 and may be configured to receive data from the memories 7103 or other devices, or to send data to the memories 7103 or other devices. For example, the interface circuits 7104 may read data stored in the memories 7103 and send the data to the processor 7101.

[0267] The communication device 7100 described in the above embodiment may be a network device or a terminal, but the scope of the communication device 7100 described in the present disclosure is not limited thereto, and the structure of the communication device 7100 may not be limited by FIG. 7A. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data or programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, an in-vehicle device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

[0268] 7B is a schematic diagram of the structure of a chip 7200 proposed in an embodiment of the present disclosure. If the communication device 7100 can be a chip or a chip system, please refer to the schematic diagram of the structure of the chip 7200 shown in FIG7B , but the present disclosure is not limited thereto.

[0269] The chip 7200 includes one or more processors 7201. The chip 7200 is configured to execute any of the above methods.

[0270] In some embodiments, chip 7200 further includes one or more interface circuits 7202. Alternatively, terms such as interface circuit, interface, and transceiver pins may be used interchangeably. In some embodiments, chip 7200 further includes one or more memories 7203 for storing data. Alternatively, all or part of memory 7203 may be located external to chip 7200. Optionally, interface circuit 7202 is connected to memory 7203 and may be used to receive data from memory 7203 or other devices, or may be used to send data to memory 7203 or other devices. For example, interface circuit 7202 may read data stored in memory 7203 and send the data to processor 7201.

[0271] In some embodiments, the interface circuit 7202 performs at least one of the communication steps (e.g., but not limited to, steps S2101 and S2102) of the aforementioned method, such as sending and / or receiving. For example, the interface circuit 7202 performing the communication steps (e.g., sending and / or receiving) of the aforementioned method means that the interface circuit 7202 performs data exchange between the processor 7201, chip 7200, memory 7203, or a transceiver device. In some embodiments, the processor 7201 performs at least one of the other steps.

[0272] The modules and / or devices described in various embodiments, such as virtual devices, physical devices, and chips, can be arbitrarily combined or separated according to circumstances. Optionally, some or all steps can also be performed collaboratively by multiple modules and / or devices, which is not limited here.

[0273] The present disclosure also proposes a storage medium having instructions stored thereon. When the instructions are executed on the communication device 7100, the communication device 7100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited thereto and may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but is not limited thereto and may also be a temporary storage medium.

[0274] The present disclosure also provides a program product, which, when executed by the communication device 7100, enables the communication device 7100 to perform any of the above methods. Optionally, the program product is a computer program product.

[0275] The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to perform any one of the above methods.

Claims

1. A beam pointing method, characterized in that: The method comprises: The terminal receives beam indication information sent by the network device, where the beam indication information is used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; The multiple collaborative TRPs are used for uplink transmission and / or downlink transmission by the terminal, and include a TRP dedicated to uplink transmission.

2. The method according to claim 1, characterized in that The beam indication information is configured as an independent beam indication mode or is predefined to support only the independent beam indication mode, and the TCI status code points of the multiple coordinated TRPs include one of the following: Uplink TCI status; Downlink TCI status; Uplink TCI status and downlink TCI status; Each uplink TCI state or each downlink TCI state is associated with a corresponding TRP; The uplink TCI state corresponds to an uplink TCI state pool, and the downlink TCI state corresponds to a downlink TCI state pool.

3. The method according to claim 2, characterized in that The uplink TCI status pool is an uplink TCI status pool independently configured through RRC signaling; The downlink TCI state pool is a downlink TCI state pool independently configured through RRC signaling, or the downlink TCI state pool is a TCI state pool shared by the downlink TCI state and the joint TCI state.

4. The method according to claim 2 or 3, characterized in that The TCI status of the plurality of TRPs is indicated by a first TCI status code point; The first TCI state code point is used to indicate an uplink TCI state; or, The first TCI state code point is used to indicate an uplink TCI state and a downlink TCI state; The one uplink TCI state and the one downlink TCI state are TCI states associated with the same TRP respectively; or, The uplink TCI state and the downlink TCI state are TCI states associated with different TRPs respectively.

5. The method according to claim 4, characterized in that The terminal performs uplink transmission based on a single TRP.

6. The method according to claim 2 or 3, characterized in that The TCI status of the plurality of TRPs is indicated by a second TCI status code point; The second TCI state code point is used to indicate one downlink TCI state and at least two uplink TCI states; Among them, one uplink TCI state of the at least two uplink TCI states is associated with the downlink TCI state as the TCI state of the same TRP; or, the one downlink TCI state and the two uplink TCI states are respectively associated with the TCI states of different TRPs.

7. The method according to claim 6, characterized in that The number of associated TRPs indicated by the second TCI status code point is 2 or 3, where the maximum number of TRPs used for uplink collaborative transmission is 2.

8. The method according to claim 6 or 7, characterized in that The terminal performs uplink collaborative transmission based on multiple TRPs.

9. The method according to any one of claims 1 to 8, characterized in that The TCI status code points corresponding to the TCI status of the multiple TRPs are activated, updated or deactivated through the media access control element MAC CE.

10. The method according to any one of claims 1 to 8, characterized in that Different TRPs are configured with different sounding reference signal (SRS) resource sets for beam management. The method further comprises: The terminal receives configuration information sent by the network device, where the configuration information is used to indicate SRS resource sets corresponding to associated different TRPs.

11. The method according to any one of claims 1 to 8, characterized in that The beam indication information is carried in downlink control information DCI.

12. A beam indication method, characterized in that: The method comprises: The network device sends beam indication information to the terminal, where the beam indication information is used to indicate the index of the TCI state code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; The multiple collaborative TRPs are used for uplink transmission and / or downlink transmission by the terminal, and include a TRP dedicated to uplink transmission.

13. The method according to claim 12, characterized in that The beam indication information is configured as an independent beam indication mode or is predefined to support only the independent beam indication mode, and the TCI status code points of the multiple coordinated TRPs include one of the following: Uplink TCI status; Downlink TCI status; Uplink TCI status and downlink TCI status; Each uplink TCI state or each downlink TCI state is associated with a corresponding TRP; The uplink TCI state corresponds to an uplink TCI state pool, and the downlink TCI state corresponds to a downlink TCI state pool.

14. The method according to claim 13, characterized in that The uplink TCI status pool is an uplink TCI status pool independently configured through RRC signaling; The downlink TCI state pool is a downlink TCI state pool independently configured through RRC signaling, or the downlink TCI state pool is a TCI state pool shared by the downlink TCI state and the joint TCI state.

15. The method according to claim 13 or 14, characterized in that The TCI status of the plurality of TRPs is indicated by a first TCI status code point; The first TCI state code point is used to indicate an uplink TCI state; or, The first TCI state code point is used to indicate an uplink TCI state and a downlink TCI state; The one uplink TCI state and the one downlink TCI state are TCI states associated with the same TRP respectively; or, The uplink TCI state and the downlink TCI state are TCI states associated with different TRPs respectively.

16. The method according to claim 15, characterized in that The terminal performs uplink transmission based on a single TRP.

17. The method according to claim 13 or 14, characterized in that The TCI status of the plurality of TRPs is indicated by a second TCI status code point; The second TCI state code point is used to indicate one downlink TCI state and at least two uplink TCI states; Among them, one uplink TCI state of the at least two uplink TCI states is associated with the downlink TCI state as the TCI state of the same TRP; or, the one downlink TCI state and the two uplink TCI states are respectively associated with the TCI states of different TRPs.

18. The method according to claim 17, characterized in that The number of associated TRPs indicated by the second TCI status code point is 2 or 3, where the maximum number of TRPs used for uplink collaborative transmission is 2.

19. The method according to claim 17 or 18, characterized in that The terminal performs uplink collaborative transmission based on multiple TRPs.

20. The method according to any one of claims 1 to 19, characterized in that The TCI status code points corresponding to the TCI status of the multiple TRPs are activated, updated or deactivated through the media access control element MAC CE.

21. The method according to any one of claims 1 to 19, characterized in that The method further comprises: The network device is configured with different SRS resource sets for beam management based on different TRPs; The network device sends configuration information to the terminal, where the configuration information is used to indicate an SRS resource set corresponding to associated different TRPs.

22. The method according to any one of claims 1 to 19, characterized in that The beam indication information is carried in downlink control information DCI.

23. A terminal, characterized in that: include: A transceiver module is used to receive beam indication information sent by a network device, wherein the beam indication information is used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; the multiple collaborative TRPs are used by the terminal for uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission.

24. A network device, characterized in that: include: A transceiver module is used to send beam indication information to the terminal, wherein the beam indication information is used to indicate the index of the TCI status code point of one or more collaborative TRPs in a communication scenario of a downlink single transmission node S-TRP and an uplink multiple transmission node M-TRP; the multiple collaborative TRPs are used by the terminal for uplink transmission and / or downlink transmission, and include a TRP dedicated to uplink transmission.

25. A terminal, characterized in that: include: one or more processors; The terminal is used to execute the beam indication method according to any one of claims 1 to 11.

26. A network device, characterized in that: include: one or more processors; The network device is used to execute the beam indication method according to any one of claims 12 to 22.

27. A communication system, characterized in that: The invention comprises a terminal and a network device, wherein the terminal is configured to implement the beam indication method according to any one of claims 1 to 11, and the network device is configured to implement the beam indication method according to any one of claims 12 to 22.

28. A storage medium storing instructions, characterized in that: When the instruction is executed on a communication device, the communication device is caused to perform the beam direction method according to any one of claims 1 to 11 or the beam direction method according to any one of claims 12 to 22.

29. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instruction is executed by a processor, the beam indication method according to any one of claims 1 to 11 or the beam indication method according to any one of claims 12 to 22 is implemented.

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