Communication method and device, and storage medium

Abstract

The invention relates to a communication method, equipment and a storage medium. The method comprises: receiving first information sent by a network device, the first information comprising a transmission configuration indication (TCI) state table and first indication information, the TCI state table comprising a corresponding relationship between a TCI state and a reference signal, the wave beam corresponding to the TCI state table is a wave beam which is determined according to a satellite motion track of a satellite network to which the terminal equipment belongs and can provide service for the terminal equipment, the first indication information is used for indicating the position of a first TCI state in the TCI state table, and the first TCI state is a TCI state corresponding to a current service wave beam of the terminal equipment; and executing TCI switching according to the first information. That is to say, the terminal device can perform TCI switching according to the TCI state table configured by the network device, so that the terminal device does not need to send the TCI state and indicate the to-be-switched beam to the terminal device during each beam switching, thereby saving the signaling overhead and improving the beam switching efficiency.

Description

Communication methods, devices and storage media Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a communication method, device and storage medium. Background Technology

[0002] In wireless communication systems, beam information can be indicated by the quasi-co-location (QCL) relationship of antenna ports. The QCL information of the Physical Downlink Shared Channel (PDSCH) can be configured by the Transmission Configuration Indication (TCI).

[0003] Summary of the Invention

[0004] This disclosure provides a communication method, device, and storage medium.

[0005] According to a first aspect of the embodiments of this disclosure, a communication method is provided, executed by a terminal device, the method comprising:

[0006] The terminal receives first information sent by a network device. The first information includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes the correspondence between TCI status and reference signals. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined according to the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of the first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current service beam of the terminal device.

[0007] Perform TCI switching based on the first information.

[0008] According to a second aspect of the embodiments of this disclosure, a communication method is provided, performed by a network device, the method comprising:

[0009] The terminal device is sent first information, which includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes the correspondence between TCI statuses and reference signals. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined based on the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of a first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current serving beam of the terminal device. The first information is used by the terminal device to perform TCI switching.

[0010] According to a third aspect of the embodiments of this disclosure, a terminal device is provided, comprising:

[0011] The transceiver module is configured to receive first information sent by the network device. The first information includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes the correspondence between TCI status and reference signals. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined according to the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of the first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current service beam of the terminal device.

[0012] The processing module is configured to perform TCI switching based on the first information.

[0013] According to a fourth aspect of the embodiments of this disclosure, a network device is provided, comprising:

[0014] The transceiver module is configured to send first information to a terminal device. The first information includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes a correspondence between TCI statuses and reference signals. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined based on the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of a first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current serving beam of the terminal device. The first information is used by the terminal device to perform TCI switching.

[0015] According to a fifth aspect of the embodiments of this disclosure, a communication device is provided, comprising:

[0016] One or more processors; wherein the communication device may be used to execute an optional implementation of the first aspect or the second aspect.

[0017] According to a sixth aspect of the present disclosure, a communication system is provided, including a terminal device and a network device, wherein the terminal device is configured to perform the method described in the optional implementation of the first aspect, and the network device is configured to perform the method described in the optional implementation of the second aspect.

[0018] According to a seventh aspect of the present disclosure, a storage medium is provided that stores instructions that, when executed on a communication device, cause the communication device to perform the method as described in an optional implementation of the first or second aspect.

[0019] According to an eighth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a communication device, implements the method described in an optional implementation of the first or second aspect.

[0020] The technical solution provided in this disclosure can produce the following beneficial effects: Receiving first information sent by a network device, the first information including a Transmission Configuration Indication (TCI) status table and first indication information, the TCI status table including the correspondence between TCI statuses and reference signals, the beam corresponding to the TCI status table being a beam capable of providing services to the terminal device determined based on the satellite motion trajectory of the satellite network to which the terminal device belongs, and the first indication information indicating the position of a first TCI status in the TCI status table, the first TCI status being the TCI status corresponding to the current serving beam of the terminal device; and performing TCI switching according to the first information. In other words, the terminal device can perform TCI switching according to the TCI status table configured by the network device. This eliminates the need to send the TCI status to the terminal device every time a beam switch occurs, thereby saving signaling overhead and improving beam switching efficiency.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings required for the description of the embodiments are introduced below. The following drawings are only some embodiments of this disclosure and do not impose specific limitations on the protection scope of this disclosure.

[0023] Figure 1A is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.

[0024] Figure 1B is a schematic diagram illustrating a TCI state switching delay based on MAC-CE according to an embodiment of the present disclosure.

[0025] Figure 1C is a schematic diagram illustrating a TCI state switching delay based on RRC according to an embodiment of the present disclosure.

[0026] Figure 2A is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure.

[0027] Figure 2B is a schematic diagram of beam switching according to an embodiment of the present disclosure.

[0028] Figure 3A is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0029] Figure 3B is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0030] Figure 3C is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0031] Figure 4A is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0032] Figure 4B is a flowchart illustrating a communication method according to an embodiment of the present disclosure.

[0033] Figure 5 is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure.

[0034] Figure 6A is a schematic diagram of the structure of a terminal device proposed in an embodiment of this disclosure.

[0035] Figure 6B is a schematic diagram of the structure of a network device proposed in an embodiment of this disclosure.

[0036] Figure 7A is a schematic diagram of the structure of the communication device proposed in an embodiment of this disclosure.

[0037] Figure 7B is a schematic diagram of the chip structure proposed in an embodiment of this disclosure. Detailed Implementation

[0038] This disclosure provides a communication method, device, and storage medium.

[0039] In a first aspect, embodiments of this disclosure provide a communication method executed by a terminal device, the method comprising:

[0040] The terminal receives first information sent by a network device. The first information includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes the correspondence between TCI status and reference signals. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined according to the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of the first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current service beam of the terminal device.

[0041] Perform TCI switching based on the first information.

[0042] In the above embodiments, the terminal device can perform TCI switching according to the TCI status table configured by the network device. In this way, it is not necessary to send the TCI status to indicate the beam to be switched to to the terminal device every time a beam switch is performed, thereby saving signaling overhead and improving beam switching efficiency.

[0043] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0044] The first condition is met;

[0045] The first condition includes at least one of the following:

[0046] The service duration of the current service beam is greater than a first threshold, where the first threshold is the duration for which the current service beam can provide services to the terminal device.

[0047] The distance between the current location of the terminal device and the beam reference point of the current service beam is greater than the second threshold.

[0048] The measurement result of the reference signal corresponding to the first TCI state is less than the third threshold. The measurement result includes at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, and signal-to-noise ratio SINR.

[0049] In the above embodiments, when the terminal device determines that the first condition is met, it performs TCI switching based on the first information, making the TCI switching judgment method more flexible.

[0050] In conjunction with some embodiments of the first aspect, in some embodiments, the first information further includes first configuration information, the first configuration information including the measurement configuration of the reference signal in the TCI status table; the method further includes:

[0051] The reference signal corresponding to the first TCI state is measured based on the first configuration information to obtain the measurement result.

[0052] In the above embodiments, the network device can configure the reference signal measurement configuration for the terminal device so that the terminal device can measure the reference signal.

[0053] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes at least one of the following:

[0054] The service duration of the current service beam is determined based on the ephemeris information of the satellite network;

[0055] The system receives a second indication message sent by the network device, the second indication message being used to indicate the service duration of the current service beam.

[0056] In the above embodiments, the terminal device can determine the service duration of the current service beam based on ephemeris information, or it can obtain the service duration of the current service beam from the network device, thereby making the method of obtaining the service duration of the current service beam more flexible.

[0057] In conjunction with some embodiments of the first aspect, in some embodiments, performing TCI switching based on the first information includes:

[0058] Based on the first indication information, determine the second TCI state from the TCI state table;

[0059] Switch to the second TCI state.

[0060] In the above embodiments, the second TCI state can be determined based on the position of the first TCI state in the TCI state table.

[0061] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0062] Send a second message to the network device, the second message being used to report that the terminal device is performing a TCI handover.

[0063] In the above embodiments, after the terminal device determines that it will perform a TCI handover, it can notify the network device.

[0064] In the above embodiments, the terminal device may send the second information to the network device using uplink resources and / or beam dwell time.

[0065] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0066] Receive the second configuration information sent by the network device;

[0067] The second configuration information includes at least one of the following:

[0068] Uplink resources;

[0069] Beam dwell time.

[0070] In the above embodiments, the network device can configure uplink resources and / or beam dwell time for the terminal device.

[0071] In conjunction with some embodiments of the first aspect, in some embodiments, sending the second information to the network device includes:

[0072] The second information is sent to the network device according to the second configuration information.

[0073] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0074] A third message is sent to the network device, the third message being used to report whether the terminal device has the capability to perform enhanced TCI handover.

[0075] In the above embodiments, the terminal device can report to the network device whether it has the capability to perform enhanced TCI handover.

[0076] In conjunction with some embodiments of the first aspect, in some embodiments, the method further includes:

[0077] The terminal device receives a third indication message sent by the network device, the third indication message being used to indicate whether the terminal device is allowed to perform a TCI handover.

[0078] In the above embodiments, the network device may send a third indication message to the terminal device to inform the terminal device whether it is allowed to perform TCI handover.

[0079] Secondly, embodiments of this disclosure provide a communication method executed by a network device, the method comprising:

[0080] The terminal device is sent first information, which includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes the correspondence between TCI statuses and reference signals. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined based on the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of a first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current serving beam of the terminal device. The first information is used by the terminal device to perform TCI switching.

[0081] In conjunction with some embodiments of the second aspect, in some embodiments, the first information further includes first configuration information, the first configuration information including the measurement configuration of the reference signal in the TCI state table; the first configuration information is used by the terminal device to measure the reference signal corresponding to the first TCI state to obtain a measurement result, the measurement result is used by the terminal device to determine whether the first condition is met, the measurement result includes at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, and signal-to-noise-interference ratio SINR.

[0082] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0083] Send a second indication message to the terminal device, the second indication message being used to indicate the service duration of the current service beam.

[0084] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0085] The first information is determined based on the location information of the terminal device;

[0086] The location information includes at least one of the following:

[0087] The location information used by the terminal device when accessing the network device;

[0088] The location information reported by the terminal device.

[0089] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0090] The terminal device receives a second message, which is used to report that the terminal device is performing a TCI handover.

[0091] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0092] Send the second configuration information to the terminal device;

[0093] The second configuration information includes at least one of the following:

[0094] Uplink resources;

[0095] Beam dwell time.

[0096] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0097] The terminal device receives third information, which is used to report whether the terminal device has the capability to perform enhanced TCI handover.

[0098] In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

[0099] A third indication message is sent to the terminal device, the third indication message being used to indicate whether the terminal device is allowed to perform TCI switching.

[0100] Thirdly, embodiments of this disclosure provide a communication method, the method comprising:

[0101] The network device sends first information to the terminal device. The first information includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes the correspondence between TCI status and reference signal. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined according to the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of the first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current service beam of the terminal device.

[0102] The terminal device performs TCI switching based on the first information.

[0103] Fourthly, embodiments of this disclosure provide a terminal device, which may include at least one of a transceiver module and a processing module; wherein the terminal device may be used to execute an optional implementation of the first aspect.

[0104] Fifthly, embodiments of this disclosure provide a network device that may include at least one of a transceiver module and a processing module; wherein the network device may be used to perform an optional implementation of the second aspect.

[0105] In a sixth aspect, embodiments of this disclosure provide a terminal device that may include one or more processors; wherein the terminal device may be used to execute an optional implementation of the first aspect.

[0106] In a seventh aspect, embodiments of this disclosure provide a network device that may include one or more processors; wherein the network device may be used to perform an optional implementation of the second aspect.

[0107] Eighthly, embodiments of this disclosure provide a communication system that may include: a terminal device and a network device; wherein the terminal device is configured to perform the method described in the optional implementation of the first aspect, and the network device is configured to perform the method described in the optional implementation of the second aspect.

[0108] In a ninth aspect, embodiments of this disclosure provide a storage medium storing instructions that, when executed on a communication device, cause the communication device to perform the method as described in an optional implementation of the first or second aspect.

[0109] In a tenth aspect, embodiments of this disclosure provide a program product that, when executed by a communication device, causes the communication device to perform the method as described in an optional implementation of the first or second aspect.

[0110] In one aspect, embodiments of this disclosure provide a computer program that, when run on a computer, causes the computer to perform the methods described in an optional implementation of the first or second aspect.

[0111] In a twelfth aspect, embodiments of this disclosure provide a chip or chip system. The chip or chip system includes processing circuitry configured to perform the methods described in optional implementations of the first or second aspect.

[0112] It is understood that the aforementioned terminal devices, network devices, communication devices, communication systems, storage media, program products, computer programs, chips, or chip systems can all be used to execute the methods proposed in the embodiments of this disclosure. Therefore, the beneficial effects that can be achieved can be referred to the beneficial effects in the corresponding methods, and will not be repeated here.

[0113] This disclosure provides a communication method, device, and storage medium. In some embodiments, the terms "information transmission method" and "information processing method," "communication method," etc., can be used interchangeably; the terms "information transmission device" and "information processing device," "communication device," "communication equipment," etc., can be used interchangeably; and the terms "information processing system," "communication system," etc., can be used interchangeably.

[0114] This disclosure is not exhaustive, but merely illustrative of some embodiments, and is not intended to limit the scope of protection of this disclosure. Unless otherwise specified, each step in a particular 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 particular embodiment can also be implemented as an independent embodiment, and the order of the steps in a particular embodiment can be arbitrarily interchanged. Furthermore, the optional implementation methods in a particular embodiment can be arbitrarily combined; moreover, the embodiments can be arbitrarily combined, for example, some or all steps of different embodiments can be arbitrarily combined, and a particular embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

[0115] In each of the disclosed embodiments, unless otherwise specified or in case of logical conflict, the terminology and / or descriptions of the embodiments are consistent and can be referenced by each other. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships.

[0116] The terminology used in the embodiments of this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure.

[0117] In this embodiment of the disclosure, unless otherwise stated, elements expressed in the singular form, such as "a," "an," "the," "the," "the," "the," "the," "the," "this," etc., can mean "one and only one," or "one or more," "at least one," etc. For example, when using articles such as "a," "an," "the," etc. in translation, the noun following the article can be understood as either a singular expression or a plural expression.

[0118] In some embodiments, "multiple" can refer to two or more.

[0119] In some embodiments, the terms “at least one of”, “one or more”, “a plurality of”, “multiple”, etc., may be used interchangeably.

[0120] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "in response to one case A, in response to another case B", etc., may include the following technical solutions depending on the situation: in some embodiments, A (execute A regardless of B); in some embodiments, B (execute B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). The same applies when there are more branches such as A, B, C, etc.

[0121] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, C, etc.

[0122] The prefixes "first," "second," etc., used in the embodiments of this disclosure are merely for distinguishing different descriptive objects and do not impose restrictions on the position, order, priority, quantity, or content of the descriptive objects. The description of the descriptive objects is found in the claims or the context of the embodiments, and the use of prefixes should not constitute unnecessary restrictions. For example, if the descriptive object is a "field," the ordinal numbers preceding "field" in "first field" and "second field" do not restrict the position or order of the "fields." "First" and "second" do not restrict whether the "fields" they modify are in the same message, nor do they restrict the order of "first field" and "second field." Similarly, if the descriptive object is a "level," the ordinal numbers preceding "level" in "first level" and "second level" do not restrict the priority between "levels." Furthermore, the number of descriptive objects is not limited by ordinal numbers and can be one or more. For example, in "first device," the number of "devices" can be one or more. Furthermore, the objects modified by different prefixes can be the same or different. For example, if the object being described is "device", then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Similarly, if the object being described is "information", then "first information" and "second information" can be the same information or different information, and their content can be the same or different.

[0123] In some embodiments, “including A,” “containing A,” “for indicating A,” and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

[0124] In some embodiments, the terms “in response to…”, “in response to determining…”, “in the case of…”, “when…”, “if…”, “if…”, etc., can be used interchangeably.

[0125] In some embodiments, the terms “greater than,” “greater than or equal to,” “not less than,” “more than,” “more than or equal to,” “not less than,” “higher than,” “higher than or equal to,” “not lower than,” and “above” can be used interchangeably, as can the terms “less than,” “less than or equal to,” “not greater than,” “less than,” “less than or equal to,” “not more than,” “lower than,” “lower than or equal to,” “not higher than,” and “below”.

[0126] In some embodiments, devices, etc., may be interpreted as physical or virtual, and their names are not limited to those described in the embodiments. Terms such as “device,” “equipment,” “circuit,” “network element,” “node,” “function,” “unit,” “section,” “system,” “network,” “chip,” “chip system,” “entity,” and “subject” are interchangeable.

[0127] In some embodiments, "network" can be interpreted as devices included in a network (e.g., access network devices, core network devices, etc.).

[0128] 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," and "Bandwidth Part (BWP)" can be used interchangeably.

[0129] 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", and "client" can be used interchangeably.

[0130] In some embodiments, access network devices, core network devices, or network devices can be replaced with terminals. For example, embodiments of this disclosure can also be applied to structures where communication between access network devices, core network devices, or network devices and terminals is replaced with communication between multiple terminals (e.g., device-to-device (D2D), vehicle-to-everything (V2X), etc.). In this case, the structure can also be configured such that the terminal has all or part of the functions of the access network device. Furthermore, terms such as "uplink" and "downlink" can be replaced with terms corresponding to communication between terminals (e.g., "sidelink"). For example, uplink channel, downlink channel, etc., can be replaced with sidelink channel or direct channel, and uplink link, downlink, etc., can be replaced with sidelink link or direct link.

[0131] 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, core network device, or network device may also be configured to have all or some of the functions of the terminal.

[0132] In some embodiments, the acquisition of data, information, etc., may comply with the laws and regulations of the country where the location is situated.

[0133] In some embodiments, data, information, etc., may be obtained with the user's consent.

[0134] Furthermore, each element, each row, or each column in the table of this disclosure can be implemented as an independent embodiment, and any combination of any element, any row, or any column can also be implemented as an independent embodiment.

[0135] Figure 1A is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure. As shown in Figure 1A, the communication system 100 may include a terminal device 101 and a network device 102.

[0136] In some embodiments, terminal device 101 may include at least one of the following: mobile phone, wearable device, Internet of Things device, car with communication function, smart car, tablet computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal device in industrial control, wireless terminal device in self-driving, wireless terminal device in remote medical surgery, wireless terminal device in smart grid, wireless terminal device in transportation safety, wireless terminal device in smart city, and wireless terminal device in smart home, but is not limited thereto.

[0137] In some embodiments, network device 102 may include at least one of access network device and core network device.

[0138] In some embodiments, the access network device may be a node or device that connects a terminal device to a wireless network. The access network device may include, but is not limited to, at least one of the following in a 5G communication system: evolved Node B (eNB), next-generation eNB (ng-eNB), next-generation Node B (gNB), node B (NB), home node B (HNB), home evolved node B (HeNB), radio backhaul device, radio network controller (RNC), base station controller (BSC), base transceiver station (BTS), base band unit (BBU), mobile switching center, base station in a 6G communication system, open RAN, cloud RAN, base station in other communication systems, and access node in a Wi-Fi system.

[0139] In some embodiments, the technical solutions of this disclosure can be applied to the Open RAN architecture. In this case, the interfaces between or within access network devices involved in the embodiments of this disclosure can be transformed into internal interfaces of Open RAN. The processes and information interactions between these internal interfaces can be implemented by software or programs.

[0140] In some embodiments, the access network device may be composed of a central unit (CU) and a distributed unit (DU). The CU may also be called a control unit. The CU-DU structure can separate the protocol layer of the access network device. Some protocol layer functions are centrally controlled by the CU, while the remaining part or all protocol layer functions are distributed in the DU and centrally controlled by the CU. However, this is not the only possibility.

[0141] In some embodiments, the core network equipment may be a single device, multiple devices, or a group of devices. The core network may include at least one of the following: Evolved Packet Core (EPC), 5G Core Network (5GCN), and Next Generation Core (NGC).

[0142] It is understood that the communication system described in this disclosure is for the purpose of more clearly illustrating the technical solutions of this disclosure, and does not constitute a limitation on the technical solutions proposed in this disclosure. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions proposed in this disclosure are also applicable to similar technical problems.

[0143] The following embodiments of this disclosure can be applied to the communication system 100 shown in FIG1A, or to some of the main bodies, but are not limited thereto. The main bodies shown in FIG1A are examples. The communication system may include all or some of the main bodies in FIG1A, or it may include other main bodies outside of FIG1A. The number and form of each main body are arbitrary. Each main body may be physical or virtual. The connection relationship between the main bodies is an example. The main bodies may not be connected or may be connected. The connection can be in any way, it can be a direct connection or an indirect connection, it can be a wired connection or a wireless connection.

[0144] The embodiments disclosed herein 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), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), and IEEE 802.20, Ultra-Wideband (UWB), Bluetooth (a 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, systems utilizing other communication methods, and next-generation systems built upon them, etc. Furthermore, multiple systems can be combined (e.g., a combination of LTE or LTE-A with 5G).

[0145] In some embodiments of this disclosure, the QCL relationship is used to indicate that the beams corresponding to multiple antenna ports have one or more identical or similar spatial characteristics. The QCL information of the PDSCH can be configured by the TCI, specifically, the TCI-state can indicate the reference signal that the DMRS of the PDSCH satisfies the QCL relationship. In FR2, the network can indicate changes in the transmit beam of the PDSCH or PDCCH by switching the TCI state.

[0146] In some embodiments, the antenna port QCL type definition in 3GPP TS38.214 is shown in Table 1.

[0147] Table 1

[0148] In some embodiments, Figure 1B is a schematic diagram illustrating a TCI state handover delay based on MAC-CE according to an embodiment of the present disclosure. As shown in Figure 1B, when the target TCI state is known, after receiving the Medium Access Control Element (MACCE) activation instruction in slot n, the UE will receive the target TCI state on the PDCCH of the serving cell where the TCI state handover is taking place. This time point is required to be no later than the time determined by formula (1). n+T HARQ +3N slot subframe,μ+TO k *(T first-SSB -T SSB-proc ) / NR slot length(1)

[0149] Among them, T HARQ It is the timing for downlink data transmission and feedback reception, T first-SSB This refers to the time of the first SSB transmission after the UE decodes the MAC CE command. Here, the SSB should be from QCL-Type A or QCL-Type C to the target TCI state. SSB-proc =2ms, NR slot length represents the length of the slot.

[0150] In some embodiments, when the target TCI state is not included in the PDSCH active state list, TO k =1, otherwise 0.

[0151] In some embodiments, at n+T HARQ +3N slotBefore subframe, μ, the UE can still receive PDCCH in the old TCI state.

[0152] In some embodiments, as shown in Figure 1B, when the target TCI state is unknown, after receiving the MAC-CE activation instruction contained in the PDSCH in slot n, the UE will receive the target TCI state on the PDCCH of the serving cell where the TCI state handover is taking place. This time point is required to be no later than the time determined by formula (2). HARQ +3N slot subframe,μ+(T L1-RSRP +TO uk *(T first-SSB -T SSB-proc )) / NR slot length(2)

[0153] Among them, T L1-RSRP It is the L1-RSRP measurement time used for Rx beam refinement.

[0154] In some embodiments, in QCL-Type D, the CSI-RS-based L1-RSRP measurement uses TO. uk =1, while L1-RSRP measurements based on SSB use TO uk =0, in other QCL types TO uk =1.

[0155] In some embodiments, at n+T HARQ +3N slot Before the subframe μ, the UE can still receive PDCCH with historical TCI status.

[0156] In some embodiments, FIG1C is a schematic diagram illustrating a TCI state handover delay based on RRC according to an embodiment of the present disclosure. As shown in FIG1C, assuming the target TCI state is known, and assuming that a PDSCH carrying a Radio Resource Control (RRC) activation instruction is received in slot n, the UE should be able to receive the PDSCH of the serving cell with the target TCI state, and its TCI state handover should not be later than the time determined by formula (3). slot n+(T RRC_processing +TO k *(T first-sSB -T SSB-proc )) / NR slot length(3)

[0157] Among them, TRRC_processing It is the RRC processing delay, T first-SSB This is the time from when the UE processes the RRC message to the first SSB transmission, where the SSB is either QCL-Type A or QCL-Type C, and the transmission is to the target TCI state. SSB-prpc andTO k Same as the definition in formula (1).

[0158] In some embodiments, the UE does not need to send or receive uplink or downlink information during handover.

[0159] In some embodiments, satellite communication has the following characteristics:

[0160] The satellite moves at a relatively high speed, which increases the frequency of beam switching;

[0161] In satellite communication systems, the near-far effect is not significant, and within the same cell, the signal quality difference between different locations is small;

[0162] The large propagation delay between the base station and the user equipment results in a significant timeliness issue between beam measurement reporting and beam indication.

[0163] In some embodiments, NTN systems need to consider more optimized beam switching mechanisms in beam management to address issues such as frequent user switching and reducing unnecessary beam switching.

[0164] In some embodiments, since the satellite's motion is regular and the timing and sequence of beam switching are regular, this disclosure proposes a UE-side triggered TCI switching method.

[0165] Figure 2A is an interactive schematic diagram illustrating a communication method according to an embodiment of the present disclosure. This method can be executed by the aforementioned communication system. As shown in Figure 2A, the method may include:

[0166] Step S2101: The network device sends the first information to the terminal device.

[0167] In some embodiments, the terminal device may receive first information. For example, the terminal device may receive first information sent by a network device. As another example, the terminal device may also receive first information sent by other entities.

[0168] In some embodiments, the first information may include a Transmission Configuration Indicator (TCI) state list and first indication information.

[0169] In some embodiments, the TCI state table may include a correspondence between TCI states and reference signals.

[0170] In some embodiments, the TCI states in the TCI state table can be arranged in chronological order. For example, the TCI states in the TCI state table can be arranged according to the chronological order of the beams providing services, with the TCI state corresponding to the earliest providing services listed first and the TCI state corresponding to the latest providing services listed last.

[0171] In some embodiments, the beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined based on the satellite motion trajectory of the satellite network to which the terminal device belongs.

[0172] In some embodiments, the beam corresponding to the TCI status table may be a beam that provides services to the terminal device in sequence.

[0173] Figure 2B is a schematic diagram of beam switching according to an embodiment of the present disclosure. As shown in Figure 2B, the order of the serving beams can be beam #4 -> beam #3 -> beam #2 -> beam #1, the serving beam at time t4 is beam #4, the serving beam at time t3 is beam #3, the serving beam at time t2 is beam #2, and the serving beam at time t1 is beam #1.

[0174] In some embodiments, different TCI states may correspond to different beams.

[0175] In some embodiments, the reference signal corresponding to the TCI state may be the reference signal on the beam corresponding to the TCI state.

[0176] For example, the beam corresponding to TCI state A is beam #1, the beam corresponding to TCI state B is beam #1, the beam corresponding to TCI state C is beam #3, the beam corresponding to TCI state D is beam #4, the reference signal corresponding to TCI state A is the reference signal on beam #1, the reference signal corresponding to TCI state B is the reference signal on beam #2, the reference signal corresponding to TCI state C is the reference signal on beam #3, and the reference signal corresponding to TCI state D is the reference signal on beam #4.

[0177] In some embodiments, the first indication information may be used to indicate the position of the first TCI state in the TCI state table.

[0178] In some embodiments, the "position in the TCI status table" can be represented by an index value, and the first indication information can be used to indicate the index value of the first TCI status in the TCI status table.

[0179] For example, if the first TCI state is TCI state A, then the index value of the first TCI state can be 0; if the first TCI state is TCI state D, then the index value of the first TCI state can be 3.

[0180] In some embodiments, the first TCI state may be the TCI state corresponding to the current serving beam of the terminal device.

[0181] For example, if the current serving beam of the terminal device is beam #2, then the first TCI state is TCI state B, and the first indication information can be the index value 1 of TCI state B.

[0182] In some embodiments, the network device may determine the first information based on the location information of the terminal device.

[0183] In some embodiments, the location information includes at least one of the following:

[0184] Location information used by terminal devices when connecting to network devices;

[0185] Location information reported by the terminal device.

[0186] In some embodiments, different beams correspond to different locations, that is, different TCI states correspond to different locations, and network devices can activate different TCI state tables for different locations.

[0187] In some embodiments, the network device can determine the TCI status table based on the location information of the terminal device when it accesses the network.

[0188] In some embodiments, the terminal device may also report its current location information to the network device, and the network device determines the TCI status table based on the location information reported by the terminal device.

[0189] In some embodiments, the terminal device may send third information to the network device, which is used to report whether the terminal device has the capability to perform enhanced TCI handover.

[0190] In some embodiments, this enhanced TCI handover is the TCI handover process described in the embodiments of this disclosure. If the terminal device is able to perform the TCI handover described in the embodiments of this disclosure, it indicates that the terminal device has the capability to perform enhanced TCI handover.

[0191] In some embodiments, the terminal device determines that it has the capability to perform enhanced TCI handover and sends the third information to the network device.

[0192] In some embodiments, after receiving the third information, the network device can determine whether the terminal device has the capability to perform enhanced TCI handover.

[0193] In some embodiments, the network device determines that the terminal device has the capability to perform enhanced TCI handover and sends the first information to the terminal device.

[0194] In some embodiments, the network device may send third instruction information to the terminal device.

[0195] In some embodiments, the third indication information is used to indicate whether the terminal device is allowed to perform enhanced TCI handover.

[0196] In some embodiments, if the network device allows the terminal device to perform enhanced TCI handover, the third indication information is sent to the terminal device.

[0197] In some embodiments, the network device may send the third indication information separately to the network device, or the third indication information may be included in the first information. This disclosure does not limit this.

[0198] In some embodiments, the third instruction information may be sent after the terminal device sends third information to the network device.

[0199] In some embodiments, the terminal device executes the enhanced TCI handover process, namely steps S2102, S2103, and S2104, only after receiving third information from the network device that allows the terminal device to perform the enhanced TCI handover.

[0200] In some embodiments, if the network device does not send the third indication information, the terminal device assumes that the network device allows it to perform enhanced TCI handover.

[0201] Step S2102: The terminal device determines that the first condition is met.

[0202] In some embodiments, the first condition includes conditions requiring a TCI switch.

[0203] In some embodiments, the first condition may include at least one of the following:

[0204] The service duration of the current serving beam is greater than the first threshold;

[0205] The distance between the current location of the terminal device and the beam reference point of the current serving beam is greater than the second threshold.

[0206] The measurement result of the reference signal corresponding to the first TCI state is less than the third threshold.

[0207] In some embodiments, the measurement result may include at least one of the following: Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), and Signal to Interference plus Noise Ratio (SINR).

[0208] In some embodiments, the service duration of the current serving beam of the terminal device can be obtained through at least one of the following methods:

[0209] The service duration of the current service beam is determined based on the ephemeris information of the satellite network;

[0210] The system receives a second indication message sent by a network device, which indicates the service duration of the current service beam.

[0211] It should be noted that the embodiments disclosed herein can refer to existing protocol methods to determine the service duration of the current service beam based on the ephemeris information of the satellite network, which will not be elaborated here.

[0212] In some embodiments, after determining the service duration of the current service beam of the terminal device, the network device may send the second indication information to the terminal device to inform the terminal device of the service duration of the current service beam.

[0213] In some embodiments, the first threshold is the duration for which the current serving beam can provide services to the terminal device.

[0214] In some embodiments, if the service duration of the current service beam is greater than the first threshold, it means that the current service beam can no longer continue to provide services to the terminal device, or the service duration of the current service beam has expired, and the terminal device can determine that the first condition is met.

[0215] In some embodiments, the terminal device may determine whether the first condition is met based on the distance between its current location and the beam reference point of the current serving beam.

[0216] In some embodiments, if it is determined that the distance between the current location of the terminal device and the beam reference point of the current serving beam is greater than a second threshold, then it is determined that the first condition is met.

[0217] In some embodiments, the second threshold may be configured by the network device or agreed upon by the protocol, and this disclosure does not limit this.

[0218] In some embodiments, the terminal device may determine whether the first condition is met based on the measurement result of the reference signal corresponding to the first TCI state.

[0219] In some embodiments, the terminal device may perform L1 measurement on the reference signal corresponding to the first TCI state to obtain the measurement result.

[0220] For example, if the measurement result is RSRP and the RSRP of the measured reference signal is less than the third threshold, then the first condition is determined to be satisfied.

[0221] In some embodiments, different measurement results may correspond to different third thresholds. For example, the third threshold corresponding to RSRP is different from the third threshold corresponding to RSRQ.

[0222] In some embodiments, the first information may further include first configuration information, which includes the measurement configuration of the reference signal in the TCI status table. The terminal device can measure the reference signal corresponding to the first TCI status according to the first configuration information to obtain the measurement result.

[0223] In some embodiments, the measurement configuration may be an L1 measurement configuration.

[0224] For example, the TCI state table includes TCI state A, TCI state B, TCI state C, and TCI state D, and the first configuration information includes the L1 measurement configuration of the reference signal corresponding to TCI state A, the L1 measurement configuration of the reference signal corresponding to TCI state B, the L1 measurement configuration of the reference signal corresponding to TCI state C, and the L1 measurement configuration of the reference signal corresponding to TCI state D.

[0225] In some embodiments, the terminal device may determine the L1 measurement configuration of the reference signal corresponding to the first TCI state, and measure the reference signal corresponding to the first TCI state according to the L1 measurement configuration to obtain the measurement result.

[0226] In some embodiments, the first information may not include the first configuration information, and the network device may send the first configuration information to the terminal device separately.

[0227] In some embodiments, if the first condition includes a measurement result of the reference signal corresponding to the first TCI state that is less than a third threshold, then the first information may include the first configuration information, or the network device may send the first configuration information to the terminal device.

[0228] In some embodiments, the terminal device can determine whether a first condition is met by a combination of multiple conditions. For example, if it is determined that the service duration of the current serving beam is greater than a first threshold, and the distance between the current location of the terminal device and the beam reference point of the current serving beam is greater than a second threshold, then the first condition is met. Another example is if it is determined that the service duration of the current serving beam is greater than the first threshold, and the measurement result of the reference signal corresponding to the first TCI state is less than a third threshold, then the first condition is met. Yet another example is if it is determined that the distance between the current location of the terminal device and the beam reference point of the current serving beam is greater than the second threshold, and the measurement result of the reference signal corresponding to the first TCI state is less than the third threshold, then the first condition is met. Similarly, if it is determined that the service duration of the current serving beam is greater than the first threshold, the distance between the current location of the terminal device and the beam reference point of the current serving beam is greater than the second threshold, and the measurement result of the reference signal corresponding to the first TCI state is less than the third threshold, then the first condition is met.

[0229] It should be noted that the example provided above for determining whether the terminal device meets the first condition is for illustrative purposes only, and this disclosure does not limit the scope of the invention.

[0230] Step S2103: The terminal device determines the second TCI status from the TCI status table according to the first instruction information.

[0231] In some embodiments, after the terminal device determines that the condition is met, it can determine the second TCI state from the TCI state table based on the first indication information.

[0232] In some embodiments, the terminal device may determine, based on the first indication information, the TCI state that follows and is adjacent to the first TCI state from the TCI state table, as the second TCI state.

[0233] For example, if the TCI status table includes TCI status A, TCI status B, TCI status C, and TCI status D, and the first TCI status is TCI status B, then the second TCI status can be determined to be TCI status C. As another example, if the index value indicated by the first indication information is 2, then the second TCI status can be determined to be the TCI status with index value 3 in the TCI status table, i.e., TCI status D. Yet another example is that the TCI status in the TCI status table that is after and adjacent to the position indicated by the first indication information can be used as the second TCI status.

[0234] Step S2104: The terminal device switches to the second TCI state.

[0235] In some embodiments, after the terminal device switches to the second TCI state, the current serving beam of the terminal device is switched to the beam corresponding to the second TCI state.

[0236] It should be noted that terminal devices can switch TCI states by referring to existing protocol methods, which will not be elaborated here.

[0237] In some embodiments, the start time of TCI switching by the terminal device is the moment when the terminal device determines that the first condition is met.

[0238] In some embodiments, the maximum handover delay for TCI handover by the terminal device is the sum of a reference signal period and a reference signal processing time. Compared with conventional TCI handover, the handover delay of TCI handover in the embodiments of this disclosure reduces signaling demodulation time and measurement time, effectively reducing the TCI handover delay.

[0239] In some embodiments, the end time of the TCI handover by the terminal device is when the terminal device receives the Physical Downlink Control Channel (PDCCH) / Physical Downlink Shared Channel (PDSCH) of the second TCI state of the serving cell in the first time slot after the TCI handover delay, or when the network device receives the TCI handover indication information sent by the terminal device.

[0240] Step S2105: The terminal device sends the second information to the network device.

[0241] In some embodiments, the network device may receive second information. For example, the network device may receive second information sent by a terminal device. As another example, the network device may also receive second information sent by other entities.

[0242] In some embodiments, the second information may be used to report when the terminal device performs a TCI switch.

[0243] In some embodiments, if a terminal device determines that it needs to switch to the second TCI state, it may send the second information to the network device.

[0244] In some embodiments, the second information may include the second TCI status.

[0245] In some embodiments, the terminal device may send the second information to the network device based on the second configuration information.

[0246] The second configuration information may include at least one of the following:

[0247] Uplink resources;

[0248] Beam dwell time.

[0249] In some embodiments, the terminal device may send the second information based on the uplink resource.

[0250] In some embodiments, the terminal device may send the second information to the network device during the beam dwell time.

[0251] In some embodiments, the network device may receive the second information sent by the terminal device during the beam dwell time.

[0252] In some embodiments, the network device may send the second configuration information to the terminal device.

[0253] In some embodiments, the network device may send the second configuration information to the terminal device separately, or the second configuration information may be included in the first information. This disclosure does not limit this aspect.

[0254] Using the above method, the terminal device can perform TCI switching according to the TCI status table configured by the network device. In this way, it is not necessary to send the TCI status to indicate the beam to be switched to to the terminal device every time a beam switch is performed, thereby saving signaling overhead and improving beam switching efficiency.

[0255] The methods involved in the embodiments of this disclosure may include at least one of the steps S2101 to S2105 described above. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, step S2104 may be implemented as an independent embodiment, step S2105 may be implemented as an independent embodiment, step S2101 + step S2102 may be implemented as an independent embodiment, step S2101 + step S2103 may be implemented as an independent embodiment, and step S2103 + step S2104 may be implemented as an independent embodiment, but are not limited thereto.

[0256] In some embodiments, the order of any two steps S2101 to S2105 can be interchanged or they can be performed simultaneously. For example, step S2105 can be interchanged with step S2104 or they can be performed simultaneously.

[0257] In some embodiments, steps S2101 to S2105 are optional, and one or more of these steps may be omitted or substituted in different embodiments. For example, step S2105 may be omitted.

[0258] In some embodiments, other alternative implementations may be described before or after the specification corresponding to FIG2A.

[0259] In some embodiments, the names of information, etc., are not limited to the names described in the embodiments. Terms such as "information", "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "domain", "field", "symbol", "symbol", "codebook", "codeword", "codepoint", "bit", "data", "program", and "chip" can be used interchangeably.

[0260] In some embodiments, “get,” “obtain,” “receive,” “transmit,” “bidirectional transmission,” and “send and / or receive” can be used interchangeably and can be interpreted as receiving from other entities, obtaining from protocols, obtaining from higher layers, obtaining through self-processing, or autonomous implementation, among other meanings.

[0261] In some embodiments, terms such as “send,” “transmit,” “report,” “distribute,” “transfer,” “bidirectional transmission,” “send and / or receive” can be used interchangeably.

[0262] In some embodiments, terms such as "certain," "preset," "default," "set," "indicated," "a certain," "any," and "first" can be used interchangeably. "Certain A," "preset A," "default A," "set A," "indicated A," "a certain A," "any A," and "first A" can be interpreted as A pre-defined in a protocol or the like, or as A obtained through setting, configuration, or instruction, or as specific A, a certain A, any A, or first A, but are not limited thereto.

[0263] Figure 3A is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3A, the present disclosure relates to a communication method that can be executed by a terminal device. The method may include:

[0264] Step S3101: Receive the first information.

[0265] The optional implementation of step S3101 can be found in the optional implementation of step S2101 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0266] Step S3102: Determine that the first condition is met.

[0267] The optional implementation of step S3102 can be found in the optional implementation of step S2102 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0268] Step S3103: Determine the second TCI status from the TCI status table according to the first instruction information.

[0269] The optional implementation of step S3103 can be found in the optional implementation of step S2103 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0270] Step S3104: Switch to the second TCI state.

[0271] The optional implementation of step S3104 can be found in the optional implementation of step S2104 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0272] Step S3105: Send the second message.

[0273] The optional implementation of step S3105 can be found in the optional implementation of step S2105 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0274] The methods involved in the embodiments of this disclosure may include at least one of the steps S3101 to S3105 described above. For example, step S3101 may be implemented as an independent embodiment, step S3102 may be implemented as an independent embodiment, step S3104 may be implemented as an independent embodiment, step S3105 may be implemented as an independent embodiment, step S3101 + step S3102 may be implemented as an independent embodiment, step S3101 + step S3103 may be implemented as an independent embodiment, and step S3103 + step S3104 may be implemented as an independent embodiment, but are not limited thereto.

[0275] In some embodiments, the order of any two steps S3101 to S3105 can be interchanged or they can be performed simultaneously. For example, step S3105 can be interchanged with step S3104 or they can be performed simultaneously.

[0276] In some embodiments, steps S3101 to S3105 are optional, and one or more of these steps may be omitted or substituted in different embodiments. For example, step S3105 may be omitted.

[0277] Figure 3B is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3B, the present disclosure relates to a communication method that can be executed by a terminal device. The method may include:

[0278] Step S3201: Receive the first information.

[0279] The optional implementation of step S3201 can be found in the optional implementation of step S2101 in Figure 2A, and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0280] Step S3202: Determine that the first condition is met.

[0281] The optional implementation of step S3202 can be found in the optional implementation of step S2102 in Figure 2A, as well as other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0282] Step S3203: Perform TCI switching based on the first information.

[0283] The optional implementation of step S3203 can be found in the optional implementation of steps S2103 to S2104 in Figure 2A, as well as other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0284] In some embodiments, the above steps are all optional.

[0285] Figure 3C is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 3C, the present disclosure relates to a communication method that can be executed by a terminal device. The method may include:

[0286] Step S3301: Receive the first information.

[0287] The optional implementation of step S3301 can be found in the optional implementation of step S2101 in Figure 2A, and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0288] Step S3302: Perform TCI switching based on the first information.

[0289] The optional implementation of step S3302 can be found in the optional implementation of steps S2102 to S2104 in Figure 2A, as well as other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0290] In some embodiments, the method further includes:

[0291] The first condition is met;

[0292] The first condition includes at least one of the following:

[0293] The service duration of the current service beam is greater than a first threshold, where the first threshold is the duration for which the current service beam can provide services to the terminal device.

[0294] The distance between the current location of the terminal device and the beam reference point of the current service beam is greater than the second threshold.

[0295] The measurement result of the reference signal corresponding to the first TCI state is less than the third threshold. The measurement result includes at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, and signal-to-noise ratio SINR.

[0296] In some embodiments, the first information further includes first configuration information, the first configuration information including the measurement configuration of the reference signal in the TCI status table; the method further includes:

[0297] The reference signal corresponding to the first TCI state is measured based on the first configuration information to obtain the measurement result.

[0298] In some embodiments, the method further includes at least one of the following:

[0299] The service duration of the current service beam is determined based on the ephemeris information of the satellite network;

[0300] The system receives a second indication message sent by the network device, the second indication message being used to indicate the service duration of the current service beam.

[0301] In some embodiments, performing TCI switching based on the first information includes:

[0302] Based on the first indication information, determine the second TCI state from the TCI state table;

[0303] Switch to the second TCI state.

[0304] In some embodiments, the method further includes:

[0305] Send a second message to the network device, the second message being used to report that the terminal device is performing a TCI handover.

[0306] In some embodiments, the method further includes:

[0307] Receive the second configuration information sent by the network device;

[0308] The second configuration information includes at least one of the following:

[0309] Uplink resources;

[0310] Beam dwell time.

[0311] In some embodiments, sending the second information to the network device includes:

[0312] The second information is sent to the network device according to the second configuration information.

[0313] In some embodiments, the method further includes:

[0314] A third message is sent to the network device, the third message being used to report whether the terminal device has the capability to perform enhanced TCI handover.

[0315] In some embodiments, the method further includes:

[0316] The terminal device receives a third indication message sent by the network device, the third indication message being used to indicate whether the terminal device is allowed to perform a TCI handover.

[0317] Figure 4A is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 4A, the present disclosure relates to a communication method that can be executed by a network device. The method may include:

[0318] Step S4101: Send the first message.

[0319] The optional implementation of step S4101 can be found in the optional implementation of step S2101 in Figure 2A and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0320] Step S4102: Receive the second information.

[0321] The optional implementation of step S4102 can be found in the optional implementation of step S2105 in Figure 2A, and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0322] In some embodiments, the above steps are all optional.

[0323] Figure 4B is a flowchart illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 4B, the present disclosure relates to a communication method that can be executed by a network device. The method may include:

[0324] Step S4201: Send the first message.

[0325] The optional implementation of step S4201 can be found in the optional implementation of step S2101 in Figure 2A, and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0326] In some embodiments, the first information further includes first configuration information, the first configuration information including the measurement configuration of the reference signal in the TCI status table; the first configuration information is used by the terminal device to measure the reference signal corresponding to the first TCI status and obtain a measurement result, the measurement result is used by the terminal device to determine whether a first condition is met, the measurement result includes at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, and signal-to-noise-interference ratio SINR.

[0327] In some embodiments, the method further includes:

[0328] Send a second indication message to the terminal device, the second indication message being used to indicate the service duration of the current service beam.

[0329] In some embodiments, the method further includes:

[0330] The first information is determined based on the location information of the terminal device;

[0331] The location information includes at least one of the following:

[0332] The location information used by the terminal device when accessing the network device;

[0333] The location information reported by the terminal device.

[0334] In some embodiments, the method further includes:

[0335] The terminal device receives a second message, which is used to report that the terminal device is performing a TCI handover.

[0336] In some embodiments, the method further includes:

[0337] Send the second configuration information to the terminal device;

[0338] The second configuration information includes at least one of the following:

[0339] Uplink resources;

[0340] Beam dwell time.

[0341] In some embodiments, the method further includes:

[0342] The terminal device receives third information, which is used to report whether the terminal device has the capability to perform enhanced TCI handover.

[0343] In some embodiments, the method further includes:

[0344] A third indication message is sent to the terminal device, the third indication message being used to indicate whether the terminal device is allowed to perform TCI switching.

[0345] Figure 5 is an interactive schematic diagram illustrating a communication method according to an embodiment of the present disclosure. As shown in Figure 5, the present disclosure relates to a communication method that can be executed by a communication system. The method may include:

[0346] Step S5101: The network device sends the first information to the terminal device.

[0347] The optional implementation of step S5101 can be found in the optional implementation of step S2101 in Figure 2A, and other related parts in the embodiments involved in Figure 2A, which will not be repeated here.

[0348] Step S5102: The terminal device performs TCI switching based on the first information.

[0349] The optional implementation of step S5102 can be found in the optional implementation of steps S2102 to S2104 in 2A, and other related parts in the embodiment involved in Figure 2A, which will not be repeated here.

[0350] In some embodiments, the above methods may include the methods described in the embodiments of the communication system, terminal device, network device, etc., which will not be repeated here.

[0351] In some embodiments, the network device determines the changes in the serving beam in a specific area based on the satellite's orbit and configures the corresponding TCI status list for the terminal. This eliminates the need to send the TCI status to the terminal device to indicate the beam to be switched every time a beam switch occurs, thus saving signaling overhead and improving beam switching efficiency.

[0352] Example 1

[0353] Step 1: Configure the network based on the TCI state list of satellite orbits. Each TCI list corresponds to a beam that will provide services to the terminal in sequence according to the satellite trajectory. For example, the expected service beam sequence for a certain area is Beam#1->Beam#2->Beam#3->Beam#4.

[0354] Step 2: Configure the uplink corresponding to the TCI list on the network, which is used by the UE to notify the network side to trigger the TCI state switch:

[0355] Indicates specific uplink resources;

[0356] Based on beam dwell time, the target TCI state of the handover is the notification received by the network from the UE side during the dwell time of the corresponding beam.

[0357] Step 3: Network devices obtain terminal location information:

[0358] UE location information can be the location information used by the UE when it is in the access connection state, or...

[0359] UE location information can be the location information reported by the UE.

[0360] Step 4: The network device activates a TCI state list based on the UE location information and indicates the position of the UE's current serving beam in the TCI list, as well as the L1 measurement configuration of the corresponding reference signal in the list.

[0361] Step 5: Based on specific conditions and TCI indication information, the UE determines the TCI state corresponding to the beam for subsequent services, and the UE autonomously performs TCI state handover. Specific conditions may include:

[0362] Based on ephemeris information, determine the current beam service duration and / or whether the current location is greater than the distance threshold between the beam reference point and the current location.

[0363] The network side directly instructs the UE on the service duration of a specific TCI state, and the UE determines that the current TCI state service duration has expired.

[0364] Step 6: The UE notifies the network to perform a TCI handover.

[0365] It should be noted that the execution order of the above steps is not limited in the embodiments disclosed herein.

[0366] Example 2

[0367] Step 1: Configure the network TCI list and the L1 measurement configuration for the corresponding reference signal in the list.

[0368] Step 2: Configure the uplink corresponding to the TCI list in the network, which is used by the UE to notify the network side to trigger the TCI state switch.

[0369] Step 3: The UE performs L1 reference signal measurement and, based on the TCI list, autonomously performs TCI state handover under specific conditions. These specific conditions may be:

[0370] The reference signal measurement result corresponding to the current TCI state is less than the threshold;

[0371] Based on ephemeris information, it is determined that the current beam service duration has ended and / or the current location is more than the distance threshold from the beam reference point.

[0372] The network side directly instructs the UE on the duration of a specific TCI state service, and the UE determines that the current TCI state service duration has expired.

[0373] Step 4: The UE notifies the network to perform a TCI handover.

[0374] It should be noted that the execution order of the above steps is not limited in the embodiments disclosed herein.

[0375] In some embodiments, the TCI handover process triggered on the UE side in the above embodiments can be based on specific UE capabilities:

[0376] The UE reports this capability based on the existing capability reporting process;

[0377] The network side can instruct the UE on whether to allow the UE to perform autonomous TCI handover operations based on specific signaling.

[0378] In some embodiments of this disclosure, the TCI switching delay satisfies:

[0379] Switch start time: The UE determines that the current beam service duration has expired, and / or the current location is more than the distance threshold from the beam reference point, and / or the current reference signal measurement result is less than the threshold;

[0380] TCI switching latency: The switching time is shortened to the maximum reference signal period and reference signal processing time, which reduces signaling demodulation time and measurement time compared to legacy latency, effectively reducing latency;

[0381] Handover end time: The UE receives the PDCCH / PDSCH of the target TCI state of the serving cell in the first time slot after the TCI handover delay, or the network side receives the TCI handover indication message from the UE side.

[0382] In some embodiments of this disclosure, a communication system is provided, which may include a terminal device and a network device, wherein the terminal device may execute the communication method executed by the terminal device in the foregoing embodiments of this disclosure; and the network device may execute the communication method executed by the network device in the foregoing embodiments of this disclosure.

[0383] This disclosure also provides an apparatus for implementing any of the above methods. For example, an apparatus is provided that includes units or modules for implementing the steps performed by the terminal in any of the above methods. Alternatively, another apparatus is provided that includes units or modules for implementing the steps performed by a network device (e.g., an access network device, a core network functional node, a core network device, etc.) in any of the above methods.

[0384] It should be understood that the division of units or modules in the above device is only a logical functional division. In actual implementation, they can be fully or partially integrated into a single physical entity, or they can be physically separated. Furthermore, the units or modules in the device can be implemented by a processor calling software: for example, the device includes a processor connected to a memory containing instructions. The processor calls the instructions stored in the memory to implement any of the above methods or to implement the functions of the units or modules in the above device. The processor can be, for example, a general-purpose processor, such as a Central Processing Unit (CPU) or a microprocessor, and the memory can be internal or external to the device. Alternatively, the units or modules in the device can be implemented in the form of hardware circuits. The functionality of some or all of the units or modules can be achieved through the design of these hardware circuits, which can be understood as one or more processors. For example, in one implementation, the hardware circuit is an Application-Specific Integrated Circuit (ASIC), and the functionality of some or all of the units or modules is achieved through the design of the logical relationships between the components within the circuit. In another implementation, the hardware circuit can be implemented using a Programmable Logic Device (PLD), such as a Field Programmable Gate Array (FPGA), which can include a large number of logic gates. The connection relationships between the logic gates are configured through configuration files, thereby achieving the functionality of some or all of the units or modules. All units or modules of the above device can be implemented entirely through processor-called software, entirely through hardware circuits, or partially through processor-called software with the remaining parts implemented through hardware circuits.

[0385] In this embodiment, the processor is a circuit with signal processing capabilities. In one implementation, the processor can be a circuit with instruction read and execute 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 relationships of hardware circuits. The logical relationships of the aforementioned hardware circuits are fixed or reconfigurable. For example, the processor is a hardware circuit implemented using 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 configuring the hardware circuit 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 hardware circuits designed for artificial intelligence, which can be understood as ASICs, such as Neural Network Processing Units (NPUs), Tensor Processing Units (TPUs), and Deep Learning Processing Units (DPUs).

[0386] Figure 6A is a schematic diagram of the structure of a terminal device according to an embodiment of this disclosure. As shown in Figure 6A, the terminal device 101 may include at least one of a transceiver module 6101, a processing module 6102, etc. In some embodiments, the transceiver module 6101 is configured to receive first information sent by a network device. The first information includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes a correspondence between TCI statuses and reference signals. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined according to the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of a first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current serving beam of the terminal device. The processing module 6102 is configured to perform TCI switching according to the first information. Optionally, the transceiver module 6101 can be used to perform at least one of the communication steps (such as step S2101, step S2105, but not limited thereto) performed by the terminal device 101 in any of the above methods, which will not be elaborated here. Optionally, the processing module 6102 can be used to perform at least one of the other steps (such as step S2102, step S2103, step S2104, but not limited thereto) performed by the terminal device 101 in any of the above methods, which will not be elaborated here.

[0387] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, which may be separate or integrated. Optionally, the transceiver module may be interchangeable with a transceiver.

[0388] In some embodiments, the processing module may be a single module or may include multiple sub-modules. Optionally, the multiple sub-modules may each perform all or part of the steps required by the processing module. Optionally, the processing module may be interchangeable with a processor.

[0389] Figure 6B is a schematic diagram of the structure of a network device according to an embodiment of this disclosure. As shown in Figure 6B, the network device 102 may include at least one of a transceiver module 6201, a processing module 6202, etc. In some embodiments, the transceiver module 6201 is configured to send first information to a terminal device. The first information includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes a correspondence between TCI status and reference signals. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined according to the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of a first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current serving beam of the terminal device. The first information is used by the terminal device to perform TCI switching. Optionally, the transceiver module 6201 may be used to perform at least one of the communication steps (e.g., steps S2101, S2105, but not limited thereto) performed by the network device 102 in any of the above methods. Further details are omitted here. Optionally, the processing module 6202 can be used to perform at least one of the other steps performed by the network device 102 in any of the above methods, which will not be described in detail here.

[0390] In some embodiments, the transceiver module may include a transmitting module and / or a receiving module, which may be separate or integrated. Optionally, the transceiver module may be interchangeable with a transceiver.

[0391] In some embodiments, the processing module may be a single module or may include multiple sub-modules. Optionally, the multiple sub-modules may each perform all or part of the steps required by the processing module. Optionally, the processing module may be interchangeable with a processor.

[0392] Figure 7A is a schematic diagram of the structure of the communication device 7100 proposed in an embodiment of this disclosure. The communication device 7100 can be a network device (e.g., access network device, core network device, etc.), a terminal (e.g., user equipment, etc.), a chip, chip system, or processor that supports the first device in implementing any of the above methods, or a chip, chip system, or processor that supports the terminal in implementing any of the above methods. The communication device 7100 can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0393] 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, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control communication devices (e.g., base stations, baseband chips, IoT devices, IoT device chips, DUs or CUs, etc.), execute programs, and process program data. The communication device 7100 is used to execute any of the above methods.

[0394] In some embodiments, the communication device 7100 further includes one or more memories 7102 for storing instructions. Optionally, all or part of the memories 7102 may also be located outside the communication device 7100.

[0395] In some embodiments, the communication device 7100 further includes one or more transceivers 7103. When the communication device 7100 includes one or more transceivers 7103, the transceivers 7103 perform at least one of the communication steps such as sending and / or receiving in the above method (e.g., steps S2101, S2105, but not limited thereto), and the processor 7101 performs at least one of the other steps (e.g., step S2103, but not limited thereto).

[0396] In some embodiments, a transceiver may include a receiver and / or a transmitter, which may be separate or integrated. Optionally, the terms transceiver, transceiver unit, transceiver, transceiver circuit, etc., may be used interchangeably; the terms transmitter, transmitting unit, transmitter, transmitting circuit, etc., may be used interchangeably; and the terms receiver, receiving unit, receiver, receiving circuit, etc., may be used interchangeably.

[0397] In some embodiments, the communication device 7100 may include one or more interface circuits. Optionally, the interface circuit is connected to the memory 7102, and the interface circuit can be used to receive signals from the memory 7102 or other devices, and can be used to send signals to the memory 7102 or other devices. For example, the interface circuit can read instructions stored in the memory 7102 and send the instructions to the processor 7101.

[0398] The communication device 7100 described in the above embodiments may be a first device or an Internet of Things (IoT) device, but the scope of the communication device 7100 described in this 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 a standalone device or may be part of a larger device. For example, the communication device may be: (1) a standalone integrated circuit IC, or chip, or chip system or subsystem; (2) a collection of one or more ICs, optionally, the IC collection may also include storage components for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, IoT device, smart IoT device, cellular phone, wireless device, handheld device, mobile unit, vehicle device, first device, cloud device, artificial intelligence device, etc.; (6) others, etc.

[0399] Figure 7B is a schematic diagram of the structure of the chip 7200 according to an embodiment of this disclosure. For cases where the communication device 7100 can be a chip or a chip system, the schematic diagram of the chip 7200 shown in Figure 7B can be referenced, but is not limited thereto.

[0400] Chip 7200 includes one or more processors 7201, which are used to perform any of the above methods.

[0401] In some embodiments, chip 7200 further includes one or more interface circuits 7203. Optionally, interface circuit 7203 is connected to memory 7202, and interface circuit 7203 can be used to receive signals from memory 7202 or other devices, and interface circuit 7203 can be used to send signals to memory 7202 or other devices. For example, interface circuit 7203 can read instructions stored in memory 7202 and send the instructions to processor 7201.

[0402] In some embodiments, the interface circuit 7203 performs at least one of the communication steps such as sending and / or receiving in the above method (e.g., steps S2101, S2105, but not limited thereto), and the processor 7201 performs at least one of the other steps (e.g., step S2103, but not limited thereto).

[0403] In some embodiments, the terms interface circuit, interface, transceiver pin, transceiver, etc., can be used interchangeably.

[0404] In some embodiments, chip 7200 further includes one or more memories 7202 for storing instructions. Optionally, all or part of the memories 7202 may be located outside of chip 7200.

[0405] This disclosure also proposes a storage medium storing instructions that, when executed on a communication device 7100, cause the communication device 7100 to perform 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 not limited thereto; it may also be a storage medium readable by other devices. Optionally, the storage medium may be a non-transitory storage medium, but not limited thereto; it may also be a temporary storage medium.

[0406] This disclosure also provides a program product that, when executed by the communication device 7100, causes the communication device 7100 to perform any of the above methods. Optionally, the program product may be a computer program product.

[0407] This disclosure also proposes a computer program that, when run on a computer, causes the computer to perform any of the above methods.

Claims

1. A communication method, characterized in that, The method, executed by a terminal device, includes: The terminal receives first information sent by a network device. The first information includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes the correspondence between TCI status and reference signals. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined according to the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of the first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current service beam of the terminal device. Perform TCI switching based on the first information.

2. The method according to claim 1, characterized in that, The method further includes: The first condition is met; The first condition includes at least one of the following: The service duration of the current service beam is greater than a first threshold, where the first threshold is the duration for which the current service beam can provide services to the terminal device. The distance between the current location of the terminal device and the beam reference point of the current service beam is greater than the second threshold. The measurement result of the reference signal corresponding to the first TCI state is less than the third threshold. The measurement result includes at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, and signal-to-noise ratio SINR.

3. The method according to claim 2, characterized in that, The first information further includes first configuration information, which includes the measurement configuration of the reference signal in the TCI status table; the method further includes: The reference signal corresponding to the first TCI state is measured based on the first configuration information to obtain the measurement result.

4. The method according to claim 2 or 3, characterized in that, The method further includes at least one of the following: The service duration of the current service beam is determined based on the ephemeris information of the satellite network; The system receives a second indication message sent by the network device, the second indication message being used to indicate the service duration of the current service beam.

5. The method according to any one of claims 2-4, characterized in that, The step of performing TCI switching based on the first information includes: Based on the first indication information, determine the second TCI state from the TCI state table; Switch to the second TCI state.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: Send a second message to the network device, the second message being used to report that the terminal device is performing a TCI handover.

7. The method according to claim 6, characterized in that, The method further includes: Receive the second configuration information sent by the network device; The second configuration information includes at least one of the following: Uplink resources; Beam dwell time.

8. The method according to claim 7, characterized in that, Sending the second information to the network device includes: The second information is sent to the network device according to the second configuration information.

9. The method according to any one of claims 1-8, characterized in that, The method further includes: A third message is sent to the network device, the third message being used to report whether the terminal device has the capability to perform enhanced TCI handover.

10. The method according to any one of claims 1-9, characterized in that, The method further includes: The terminal device receives a third indication message sent by the network device, the third indication message being used to indicate whether the terminal device is allowed to perform a TCI handover.

11. A communication method, characterized in that, Performed by a network device, the method includes: Send first information to the terminal device, the first information including a Transmission Configuration Indicator (TCI) status table and first indication information, the TCI... The status table includes the correspondence between TCI status and reference signal. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined according to the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of the first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current service beam of the terminal device. The first information is used for the terminal device to perform TCI switching.

12. The method according to claim 11, characterized in that, The first information also includes first configuration information, which includes the measurement configuration of the reference signal in the TCI status table; the first configuration information is used by the terminal device to measure the reference signal corresponding to the first TCI status and obtain measurement results, which include at least one of the following: reference signal received power RSRP, reference signal received quality RSRQ, and signal-to-noise-interference ratio SINR.

13. The method according to claim 11 or 12, characterized in that, The method further includes: Send a second indication message to the terminal device, the second indication message being used to indicate the service duration of the current service beam.

14. The method according to any one of claims 11-13, characterized in that, The method further includes: The first information is determined based on the location information of the terminal device; The location information includes at least one of the following: The location information used by the terminal device when accessing the network device; The location information reported by the terminal device.

15. The method according to any one of claims 11-14, characterized in that, The method further includes: The terminal device receives a second message, which is used to report that the terminal device is performing a TCI handover.

16. The method according to claim 15, characterized in that, The method further includes: Send the second configuration information to the terminal device; The second configuration information includes at least one of the following: Uplink resources; Beam dwell time.

17. The method according to any one of claims 11-16, characterized in that, The method further includes: The terminal device receives third information, which is used to report whether the terminal device has the capability to perform enhanced TCI handover.

18. The method according to any one of claims 11-17, characterized in that, The method further includes: A third indication message is sent to the terminal device, the third indication message being used to indicate whether the terminal device is allowed to perform TCI switching.

19. A terminal device, characterized in that, include: The transceiver module is configured to receive first information sent by the network device. The first information includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes the correspondence between TCI status and reference signals. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined according to the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of the first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current service beam of the terminal device. The processing module is configured to perform TCI switching based on the first information.

20. A network device, characterized in that, include: The transceiver module is configured to send first information to a terminal device. The first information includes a Transmission Configuration Indication (TCI) status table and first indication information. The TCI status table includes a correspondence between TCI statuses and reference signals. The beam corresponding to the TCI status table is a beam that can provide services to the terminal device, determined based on the satellite motion trajectory of the satellite network to which the terminal device belongs. The first indication information is used to indicate the position of a first TCI status in the TCI status table. The first TCI status is the TCI status corresponding to the current serving beam of the terminal device. The first information is used by the terminal device to perform TCI switching.

21. A communication device, characterized in that, Its features include: One or more processors; The communication device is used to perform the communication method according to any one of claims 1 to 10 or claims 11 to 18.

22. A storage medium storing instructions, characterized in that, When the instructions are executed on a communication device, the communication device performs the communication method as described in any one of claims 1 to 10 or claims 11 to 18.

23. A communication system, characterized in that, The communication system includes a terminal device and a network device, wherein the terminal device is configured to implement the communication method according to any one of claims 1 to 10, and the network device is configured to implement the communication method according to any one of claims 11 to 18.

24. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by the communication device, it implements the communication method according to any one of claims 1 to 10 or claims 11 to 18.

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