WO2025102249A1 - 波束指示方法、设备和存储介质 - Google Patents

波束指示方法、设备和存储介质 Download PDF

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Publication number
WO2025102249A1
WO2025102249A1 PCT/CN2023/131649 CN2023131649W WO2025102249A1 WO 2025102249 A1 WO2025102249 A1 WO 2025102249A1 CN 2023131649 W CN2023131649 W CN 2023131649W WO 2025102249 A1 WO2025102249 A1 WO 2025102249A1
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WIPO (PCT)
Prior art keywords
tci
terminal device
information
tci state
target cell
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PCT/CN2023/131649
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English (en)
French (fr)
Inventor
罗星熠
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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Application filed by Beijing Xiaomi Mobile Software Co Ltd filed Critical Beijing Xiaomi Mobile Software Co Ltd
Priority to PCT/CN2023/131649 priority Critical patent/WO2025102249A1/zh
Priority to CN202380012259.5A priority patent/CN117813855A/zh
Publication of WO2025102249A1 publication Critical patent/WO2025102249A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a beam indication method, device and storage medium.
  • the 3rd Generation Partnership Project introduced Layer 1 (L1) or Layer 2 (L2) triggered mobility (L1/L2-triggered Mobility, LTM). Based on LTM, network equipment can configure multiple candidate cells (or candidate cell groups) for terminal devices and control terminal devices to switch through L1 signaling or L2 signaling.
  • L1 Layer 1
  • L2 Layer 2
  • LTM Layer 1 triggered Mobility
  • the embodiments of the present disclosure provide a beam indication method, device, and storage medium.
  • a beam indication method comprising:
  • first information sent by a first network device, where the first information triggers the terminal device to perform a handover to a target cell, and the first network device is a network device corresponding to a current serving cell of the terminal device;
  • TCI state Determine a first transmission configuration indication TCI state according to the first information, where the first TCI state indicates a first beam, and the first beam is a beam used by the terminal device in a process of performing a handover to the target cell;
  • a beam indication method comprising:
  • a first information is sent to a terminal device, wherein the first information triggers the terminal device to perform a switch to a target cell, and the first network device is a network device corresponding to a current serving cell of the terminal device.
  • a beam indication method comprising:
  • Send fourth information to the terminal device where the fourth information is used to determine that the terminal device has successfully switched to the target cell, and the second network device is the network device corresponding to the target cell.
  • a terminal device including:
  • a transceiver module is configured to receive first information sent by a first network device, wherein the first information triggers the terminal device to perform a handover to a target cell, and the first network device is a network device corresponding to a current serving cell of the terminal device;
  • the processing module is configured to determine a first transmission configuration indication TCI state based on the first information, the first TCI state indicating a first beam, and the first beam is a beam used by the terminal device when performing a switch to the target cell; determine a second TCI state, the second TCI state indicating a second beam, and the second beam is a beam used by the terminal device after switching to the target cell, and the second TCI state is the same as or different from the first TCI state.
  • a first network device including:
  • the transceiver module is configured to send first information to the terminal device, wherein the first information triggers the terminal device to perform a switch to a target cell, and the first network device is a network device corresponding to a current serving cell of the terminal device.
  • a second network device including:
  • the transceiver module is configured to send fourth information to the terminal device, where the fourth information is used to determine that the terminal device has successfully switched to the target cell, and the second network device is the network device corresponding to the target cell.
  • a communication device comprising: one or more processors; wherein the communication device can be used to execute an optional implementation of the first aspect, the second aspect or the third aspect.
  • a storage medium which stores instructions.
  • the communication device executes the method described in the optional implementation of the first aspect, the second aspect or the third aspect.
  • a communication system which may include: a terminal device, a first network device, and a second network device; wherein the terminal device is configured to execute the method described in the optional implementation manner of the first aspect, the first network device is configured to execute the method described in the optional implementation manner of the second aspect, and the second network device is configured to execute the method described in the optional implementation manner of the third aspect.
  • the technical solution provided by the embodiment of the present disclosure may include the following beneficial effects: receiving first information sent by a first network device, the first information triggering the terminal device to perform a handover to a target cell, the first network device being a network device corresponding to a current serving cell of the terminal device; determining a first transmission configuration indication TCI state according to the first information, the first TCI state indicating a first beam, the first beam being a beam used by the terminal device in a process of performing a handover to the target cell; determining a second TCI state, the second TCI state indicating a second beam, the second beam
  • the second TCI state is the same as or different from the first TCI state.
  • the terminal device can determine the second beam used after switching to the target cell, so that the terminal device switches to the target cell and communicates through the target cell, thereby improving the switching success rate and communication efficiency.
  • the terminal device needs to use a corresponding beam to perform signal transmission (such as data or signaling transmission) after switching to the target cell. Therefore, how to determine the transmission beam becomes a problem that needs to be solved urgently.
  • FIG1A is a schematic diagram of an architecture of a communication system according to an embodiment of the present disclosure.
  • FIG. 1B is a schematic diagram showing configuration information according to an embodiment of the present disclosure.
  • FIG2A is an interactive schematic diagram of a beam indication method according to an embodiment of the present disclosure.
  • FIG2B is an interactive schematic diagram of a beam indication method according to an embodiment of the present disclosure.
  • FIG2C is an interactive schematic diagram of a beam indication method according to an embodiment of the present disclosure.
  • FIG3A is a schematic flow chart of a beam indication method according to an embodiment of the present disclosure.
  • FIG3B is a flow chart of a beam indication method according to an embodiment of the present disclosure.
  • FIG3C is a flow chart of a beam indication method according to an embodiment of the present disclosure.
  • FIG4A is a schematic flow chart of a beam indication method according to an embodiment of the present disclosure.
  • FIG4B is a flow chart of a beam indication method according to an embodiment of the present disclosure.
  • FIG4C is a flow chart of a beam indication method according to an embodiment of the present disclosure.
  • FIG5A is a schematic flow chart of a beam indication method according to an embodiment of the present disclosure.
  • FIG5B is a flow chart of a beam indication method according to an embodiment of the present disclosure.
  • FIG5C is a flow chart of a beam indication method according to an embodiment of the present disclosure.
  • FIG6 is a schematic flow chart of a beam indication method according to an embodiment of the present disclosure.
  • FIG. 7A is a schematic diagram of the structure of a terminal device according to an embodiment of the present disclosure.
  • FIG. 7B is a schematic diagram of the structure of a first network device according to an embodiment of the present disclosure.
  • FIG. 7C is a schematic diagram of the structure of a second network device according to an embodiment of the present disclosure.
  • FIG8A is a schematic diagram of the structure of a communication device according to an embodiment of the present disclosure.
  • FIG8B is a schematic diagram of the structure of a chip according to an embodiment of the present disclosure.
  • the embodiments of the present disclosure provide a beam indication method, device, and storage medium.
  • an embodiment of the present disclosure provides a beam indication method, the method comprising:
  • first information sent by a first network device, where the first information triggers the terminal device to perform a handover to a target cell, and the first network device is a network device corresponding to a current serving cell of the terminal device;
  • TCI state Determine a first transmission configuration indication TCI state according to the first information, where the first TCI state indicates a first beam, and the first beam is a beam used by the terminal device in a process of performing a handover to the target cell;
  • the terminal device can determine the second beam to be used after switching to the target cell, so that the terminal device switches to the target cell and communicates through the target cell, thereby improving the switching success rate and communication efficiency.
  • the first information includes a first identifier and/or a second identifier
  • the first identifier is the cell identifier of the target cell
  • the second identifier is used to determine the first TCI state.
  • the terminal device can determine the target cell for switching and the first TCI state based on the first information, thereby improving the flexibility of beam indication during the switching process.
  • the method further includes:
  • Receive second information sent by the first network device the second information including parameters of a first TCI set and a candidate cell preconfigured by the first network device for the terminal device, the first TCI set including a TCI state corresponding to the candidate cell, and the candidate cell being a cell configured by the first network device for beam measurement for the terminal device.
  • the first TCI set can be preconfigured through the second information, thereby improving the flexibility of switching control.
  • the method further includes:
  • the third information is the TCI state corresponding to the activation of one or more candidate cells in the first TCI set by the terminal device.
  • the TCI state can be activated through the third information, thereby further improving the flexibility of the switching control.
  • the first TCI state is any one of the following:
  • the first TCI state used in the switching process can be flexibly determined, so that the switching process can be flexibly controlled.
  • the second TCI state is any one of the following:
  • At least one of the TCI states in the first TCI set that is activated and corresponds to the target cell is different from the first TCI state.
  • the first TCI state used after switching can be flexibly determined, so that the signal transmission after switching can be flexibly controlled.
  • the method further includes:
  • the fourth information can indicate that the terminal device has successfully switched to the target cell, thereby improving the switching reliability.
  • the fourth information is the first scheduling new transmission of the terminal device on the target cell; or,
  • the fourth information is preset information, and the preset information is transmitted on a physical downlink shared channel PDSCH scheduled for the first time by the target cell.
  • any of the above fourth information can be used to indicate that the terminal device has successfully switched to the target cell, thereby improving the flexibility of switching control.
  • the method further includes:
  • the third TCI state can be deactivated through the fifth information, thereby reducing the TCI states activated by the terminal device and reducing the power consumption of the terminal device.
  • the TCI state includes a quasi-co-located QCL source
  • the QCL source includes at least one of the following:
  • the channel state information reference signal CSI-RS of the candidate cell is the channel state information reference signal CSI-RS of the candidate cell.
  • SSB and/or CSI-RS may be used as QCL sources, and beam indication may be performed flexibly.
  • the first TCI set is a union of the second TCI sets of each candidate cell, and the second TCI set is the TCI set of the candidate cell itself; or,
  • the first TCI set includes at least one TCI identifier, and one TCI identifier corresponds to one TCI state in the second TCI set.
  • the first TCI set is associated with the second TCI set of the candidate cell to flexibly implement the switching of the first TCI set.
  • the method further includes:
  • the fourth TCI state includes any one of the following:
  • a TCI state in the first TCI set that is in an activated state and corresponds to the target cell
  • the TCI states in the first TCI set are in an activated state.
  • the terminal device can flexibly control the fourth TCI state to remain activated, thereby improving the flexibility of beam indication based on the TCI state.
  • the method further includes:
  • the terminal device can activate the fifth TCI state according to the instruction of the second network device, thereby improving the flexibility of beam indication.
  • the sixth information is used to instruct the terminal device to activate the fifth TCI state and deactivate the second TCI state.
  • the target cell can deactivate the second TCI state and activate the fifth TCI state, further improving the flexibility of beam indication.
  • the manner in which the terminal device switches to the target cell is based on switching without random access.
  • the success rate and communication efficiency of the terminal device based on non-random access switching can be improved.
  • an embodiment of the present disclosure provides a beam indication method, the method comprising:
  • a first information is sent to a terminal device, wherein the first information triggers the terminal device to perform a switch to a target cell, and the first network device is a network device corresponding to a current serving cell of the terminal device.
  • the first network device can instruct the terminal device to determine the second beam to be used after switching to the target cell, so that the terminal device switches to the target cell and communicates through the target cell, thereby improving the switching success rate and communication efficiency.
  • the first information includes a first identifier and/or a second identifier
  • the first identifier is the cell identifier of the target cell
  • the second identifier is used to determine a first transmission configuration indication TCI state
  • the first TCI state indicates a first beam
  • the first beam is the beam used by the terminal device after switching to the target cell.
  • the method further includes:
  • the second information including parameters of a first TCI set and a candidate cell preconfigured by the first network device for the terminal device, the first TCI set including a TCI state corresponding to the candidate cell, and the candidate cell being a cell configured by the first network device for beam measurement for the terminal device.
  • the method further includes:
  • the first TCI state is any one of the following:
  • the terminal device determines the second beam through a second TCI state, where the second beam is a beam used by the terminal device after switching to the target cell; the second TCI state is any one of the following:
  • At least one of the TCI states in the first TCI set that is activated and corresponds to the target cell is different from the first TCI state.
  • the TCI state includes a quasi-co-located QCL source
  • the QCL source includes at least one of the following:
  • the channel state information reference signal CSI-RS of the candidate cell is the channel state information reference signal CSI-RS of the candidate cell.
  • the first TCI set is a union of the second TCI sets of each candidate cell, and the second TCI set is the TCI set of the candidate cell itself; or,
  • the first TCI set includes at least one TCI identifier, and one TCI identifier corresponds to one TCI state in the second TCI set.
  • the manner in which the terminal device switches to the target cell is based on switching without random access.
  • an embodiment of the present disclosure provides a beam indication method, the method comprising:
  • Send fourth information to the terminal device where the fourth information is used to determine that the terminal device has successfully switched to the target cell, and the second network device is the network device corresponding to the target cell.
  • the second network device can instruct the terminal device to successfully switch to the target cell, thereby improving the switching success rate and communication efficiency.
  • the fourth information is the first scheduling new transmission of the terminal device on the target cell; or,
  • the fourth information is preset information, and the preset information is transmitted on a physical downlink shared channel PDSCH scheduled for the first time by the target cell.
  • the method further includes:
  • the fifth information instructing the terminal device to deactivate a third TCI state is all or part of the TCI state in the first TCI set
  • the first TCI set includes TCI states corresponding to candidate cells
  • the candidate cells are cells configured by the first network device for beam measurement for the terminal device.
  • the TCI state includes a quasi-co-located QCL source
  • the QCL source includes at least one of the following:
  • the channel state information reference signal CSI-RS of the candidate cell is the channel state information reference signal CSI-RS of the candidate cell.
  • the first TCI set is a union of the second TCI sets of each candidate cell, and the second TCI set is the TCI set of the candidate cell itself; or,
  • the first TCI set includes at least one TCI identifier, and one TCI identifier corresponds to one TCI state in the second TCI set.
  • the method further includes:
  • the sixth information indicates a fifth TCI state
  • the fifth TCI state is the TCI state of the target cell itself.
  • the sixth information is used to instruct the terminal device to activate the fifth TCI state and deactivate the second TCI state.
  • the manner in which the terminal device switches to the target cell is based on switching without random access.
  • an embodiment of the present disclosure proposes 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 the optional implementation method of the first aspect.
  • an embodiment of the present disclosure proposes a first network device, which may include at least one of a transceiver module and a processing module; wherein the first network device may be used to execute the optional implementation method of the second aspect.
  • an embodiment of the present disclosure proposes a second network device, which may include at least one of a transceiver module and a processing module; wherein the second network device may be used to execute the optional implementation method of the third aspect.
  • an embodiment of the present disclosure proposes a communication device, which may include: one or more processors; wherein the communication device can be used to execute an optional implementation method of the first aspect, the second aspect, or the third aspect.
  • an embodiment of the present disclosure proposes a storage medium storing instructions, which, when executed on a communication device, enables the communication device to execute a method as described in an optional implementation of the first aspect, the second aspect, or the third aspect.
  • an embodiment of the present disclosure proposes a communication system, which may include: a terminal device, a first network device, and a second network device; wherein the terminal device is configured to execute the method described in the optional implementation manner of the first aspect, the first network device is configured to execute the method described in the optional implementation manner of the second aspect, and the second network device is configured to execute the method described in the optional implementation manner of the third aspect.
  • an embodiment of the present disclosure proposes a program product, which, when executed by a communication device, enables the communication device to execute the method described in the optional implementation manner of the first aspect, the second aspect, or the third aspect.
  • an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first aspect, the second aspect, or the third aspect.
  • an embodiment of the present disclosure provides a chip or a chip system.
  • the chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first aspect, the second aspect, or the third aspect.
  • the above-mentioned terminal device, the first network device, the second network device, the communication device, the communication system, the storage medium, the program product, the computer program, the chip or the chip system can be used to execute the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method, which will not be repeated here.
  • the embodiments of the present disclosure provide a beam indication method, device and storage medium.
  • the terms beam indication method, information processing method, communication method, etc. can be replaced with each other; the terms beam indication device, information processing device, communication device, communication equipment, etc. can be replaced with each other; the terms information processing system, communication system, etc. can be replaced with each other.
  • each step in a certain embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined.
  • a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged.
  • the optional implementation methods in a certain embodiment can be arbitrarily combined; in addition, the embodiments can be arbitrarily combined, for example, some or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.
  • elements expressed in the singular form such as “a”, “an”, “the”, “above”, “said”, “aforementioned”, “this”, etc., may mean “one and only one", or “one or more”, “at least one”, etc.
  • the noun after the article may be understood as a singular expression or a plural expression.
  • plural may refer to two or more than two.
  • the terms “at least one,” “one or more,” “a plurality of,” “multiple,” etc. may be used interchangeably.
  • "at least one of A and B", “A and/or B", “A in one case, B in another case”, “in response to one case A, in response to another case B”, etc. may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.
  • the recording method of "A or B” may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed).
  • A A is executed independently of B
  • B B is executed independently of A
  • execution is selected from A and B (A and B are selectively executed).
  • prefixes such as “first” and “second” in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute restrictions on the position, order, priority, quantity or content of the description objects.
  • the statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute unnecessary restrictions due to the use of prefixes.
  • the description object is a "field”
  • the ordinal number before the "field” in the "first field” and the "second field” does not limit the position or order between the "fields”
  • the "first” and “second” do not limit whether the "fields” they modify are in the same message, nor do they limit the order of the "first field” and the "second field”.
  • the description object is a "level”
  • the ordinal number before the "level” in the “first level” and the “second level” does not limit the priority between the "levels”.
  • the number of description objects is not limited by the ordinal number, and can be one or more. Taking the "first device” as an example, the number of "devices” can be one or more.
  • the objects modified by different prefixes may be the same or different. For example, if the description object is "device”, then the “first device” and the “second device” may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information”, then the "first information” and the “second information” may be the same information or different information, and their contents may be the same or different.
  • “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.
  • terms such as “greater than”, “greater than or equal to”, “not less than”, “more than”, “more than or equal to”, “not less than”, “higher than”, “higher than or equal to”, “not lower than”, and “above” can be replaced with each other, and terms such as “less than”, “less than or equal to”, “not greater than”, “less than”, “less than or equal to”, “no more than”, “lower than”, “lower than or equal to”, “not higher than”, and “below” can be replaced with each other.
  • devices and the like may be interpreted as physical or virtual, and their names are not limited to the names described in the embodiments.
  • Terms such as “device”, “equipment”, “device”, “circuit”, “network element”, “node”, “function”, “unit”, “section”, “system”, “network”, “chip”, “chip system”, “entity”, and “subject” may be used interchangeably.
  • network can be interpreted as devices included in the network (eg, network equipment, access network equipment, core network equipment, etc.).
  • the network device may include at least one of an access network device and a core network device.
  • Access Network Device AN Device
  • Radio Access Network Device RAN Device
  • Base Station Radio Base Station
  • Fixed Station Fixed Station
  • Node Node
  • Access Point Access Point
  • TP Transmission Point
  • RP Reception Point
  • TRP Cell reception point
  • terminal refers to any combination of the terms "terminal”, “terminal device”, “terminal side device”, “user equipment (UE)”, “user terminal (User Terminal)", “mobile station (MS)”, “mobile terminal (MT)", subscriber station (Subscriber Station), mobile unit (Mobile Unit), subscriber unit (Subscriber Unit), wireless unit (Wireless Unit), remote unit (Remote Unit), mobile device (Mobile Device), wireless device (Wireless Device), wireless communication device (Wireless Communication Device), remote device (Remote Device), mobile subscriber station (Mobile Subscriber Station), access terminal (Access Terminal), mobile terminal (Mobile Terminal), wireless terminal (Wireless Terminal), remote terminal (Remote Terminal), handheld device (Handset), user agent (User Agent), mobile client (Mobile Client), client (Client) and the like can be used interchangeably.
  • the access network device, the core network device, or the network device can be replaced by a terminal device.
  • the various embodiments of the present disclosure can also be applied to a structure in which the communication between the access network device, the core network device, or the network device and the terminal device is replaced by the communication between multiple terminal devices (for example, device-to-device (D2D), vehicle-to-everything (V2X), etc.).
  • D2D device-to-device
  • V2X vehicle-to-everything
  • it can also be set as a structure in which the terminal device has all or part of the functions of the access network device.
  • terms such as "uplink” and “downlink” can also be replaced by terms corresponding to communication between terminal devices (for example, "side”).
  • uplink channels, downlink channels, etc. can be replaced by side channels or direct channels
  • uplinks, downlinks, etc. can be replaced by side links or direct links.
  • the terminal device may be replaced by an access network device, a core network device, or a network device.
  • the access network device, the core network device, or the network device may also be configured to have a structure that has all or part of the functions of the terminal device.
  • acquisition of data, information, etc. may comply with the laws and regulations of the country where the data is obtained.
  • data, information, etc. may be obtained with the user's consent.
  • each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns may also be implemented as an independent embodiment.
  • FIG1A is a schematic diagram of the architecture of a communication system according to an embodiment of the present disclosure.
  • the communication system 100 may include a terminal device 101 and a network device 102.
  • the terminal device 101 may include a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a vehicle-mounted terminal, a tablet computer (Pad), a computer with wireless transceiver function, a road side unit (RSU, Road Side Unit), a virtual reality (Virtual Reality, VR) terminal device, an augmented reality (Augmented Reality, AR) terminal device, a wireless terminal device in industrial control (Industrial Control), a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in smart grid (Smart Grid), a wireless terminal device in transportation safety (Transportation Safety), a wireless terminal device in a smart city (Smart City), and at least one of a wireless terminal device in a smart home (Smart Home), but is not limited to these.
  • a mobile phone a wearable device, an Internet of Things device, a car with communication function, a smart car, a vehicle-mounted terminal, a tablet computer (Pad), a computer
  • the network device 102 may include at least one of an access network device and a core network device.
  • the access network device may be a node or device that accesses a terminal device to a wireless network.
  • the access network device may include an evolved Node B (eNB), a next generation evolved Node B (ng-eNB), a next generation Node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.
  • eNB evolved Node B
  • ng-eNB next generation evolved Node B
  • gNB next generation Node B
  • NB node B
  • the technical solution of the present disclosure may be applicable to the Open RAN architecture.
  • the interfaces between access network devices or within access network devices involved in the embodiments of the present disclosure may become internal interfaces of Open RAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.
  • the access network device may be composed of a centralized unit (Central Unit, CU) and a distributed unit (Distributed Unit, DU), wherein the CU may also be called a control unit (Control Unit).
  • the CU-DU structure may be used to split the protocol layer of the access network device, with some functions of the protocol layer being centrally controlled by the CU, and the remaining part or all of the functions of the protocol layer being distributed in the DU, and the DU being centrally controlled by the CU, but not limited to this.
  • the core network device may be one device, or may be multiple devices or a group of devices.
  • the core network may include at least one of an Evolved Packet Core (EPC), a 5G Core Network (5GCN), and a Next Generation Core (NGC).
  • EPC Evolved Packet Core
  • 5GCN 5G Core Network
  • NGC Next Generation Core
  • the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution proposed in the embodiment of the present disclosure.
  • a person of ordinary skill in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution proposed in the embodiment of the present disclosure is also applicable to similar technical problems.
  • the following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG. 1A or part of the subject, but are not limited thereto.
  • the subjects shown in FIG. 1A are examples, and the communication system may include all or part of the subjects in FIG. 1A, or may include other subjects other than FIG. 1A, and the number and form of the subjects are arbitrary, and the subjects may be physical or virtual, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected, and the connection may be in any manner, and may be a direct connection or an indirect connection, and may be a wired connection or a wireless connection.
  • Embodiments of the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), 5G new radio (NR), future radio access (FRA), new radio access technology (RAT), new radio (NR), new radio access (NX), future generation radio access (FX), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) network, Device-to-Device (D2D) system, Machine-to-Machine (M2M) system, Internet of Things (IoT) system, Vehicle-to-Everything (V
  • the network device 102 may include a first network device 1021 and a second network device 1022 .
  • the terminal device can perform a cell handover between the first network device 1021 and the second network device 1022.
  • the first network device 1021 can be a network device corresponding to the current serving cell of the terminal device, and the serving cell can also be called a source cell (Source Cell) of the handover, that is, a cell where the terminal device performs signal transmission before the handover.
  • the second network device 1022 can be a network device corresponding to the target cell (Target Cell) of the terminal device, that is, a cell where the terminal device performs signal transmission after the handover. Based on mobility management, the terminal device can switch from the source cell of the first network device 1021 to the target cell of the second network device 1022.
  • the first network device 1021 and the second network device 1022 may be different access network devices (e.g., base stations), and the source cell and the target cell may be cells belonging to different access network devices (e.g., base stations). In this way, the terminal device can perform inter-station and inter-cell handover.
  • the first network device 1021 and the second network device 1022 may be two cells under the same access network device (eg, a base station), one being a source cell and the other being a target cell. In this way, the terminal device may perform intra-cell handover.
  • a base station e.g., a base station
  • the terminal device may perform intra-cell handover.
  • the above communication system may support LTM (L1/L2-triggered Mobility).
  • LTM L1/L2-triggered Mobility
  • the network device may configure one or more candidate cells (or candidate cell groups) for the terminal device, and the network device may control the terminal device to switch to the target cell through L1 signaling or L2 signaling.
  • the target cell may be a cell (or cell group) selected by the serving cell from one or more candidate cells (or candidate cell groups) according to the beam measurement result.
  • the terminal device can perform switching based on the L1 signaling or L2 signaling of the network device, for example, changing the service cell (or cell group) from the "source cell” to the target cell, where the target cell is a cell (or cell group) selected by the service cell from one or more candidate cells (or candidate cell groups) based on the beam measurement results.
  • the above-mentioned L1 signaling may include downlink control information (Downlink Control Information, DCI).
  • DCI Downlink Control Information
  • the above-mentioned L2 signaling may include a media access control control element (MAC CE).
  • MAC CE media access control control element
  • the above-mentioned cell may also be a transmission and/or reception point (Transmission/Reception Point, TRP), and the above-mentioned cell group may also be a TRP group.
  • TRP Transmission/Reception Point
  • the terminal device can perform signal measurement on one or more candidate cells, for example, the signal measurement can be based on a reference signal.
  • the reference signal can be a synchronization signal block (Synchronization Signal Block, SSB), a channel state information reference signal (Channel State Information Reference Signal, CSI-RS) or other reference signals.
  • SSB Synchronization Signal Block
  • CSI-RS Channel State Information Reference Signal
  • the terms “Synchronization Signal Block (SSB)", “Synchronization Signal And Physical Downlink Broadcast Channel Block” and the like can be interchangeable.
  • the signal measurement may be a measurement for LTM (Layer 1 or Layer 2 Triggered Mobility).
  • LTM Layer 1 or Layer 2 Triggered Mobility
  • the name of the signal measurement is not limited, for example, it can be “beam measurement”, “L1 measurement”, “LTM-based measurement”, “same-frequency measurement”, “neighboring area measurement”, “same-frequency neighboring area measurement”, “same-frequency L1 measurement”, “L1-RSRP measurement”, “L1-SINR measurement”, “L1-RSRQ measurement”, “same-frequency L1-RSRP measurement”, “same-frequency L1-SINR measurement”, “same-frequency L1-RSRQ measurement”, etc.
  • the terminal device can obtain at least one of the following measurement results:
  • L1-RSRP Physical layer reference signal receiving power
  • L1-SINR Physical layer signal to interference plus noise ratio
  • L1-RSRQ Physical layer reference signal receiving quality
  • the terminal device may perform cell switching based on a RACH-less switching method. For example, the terminal device may implement switching from a source cell to a target cell based on RACH-less LTM.
  • the source cell may indicate the beam of the target cell to the terminal device based on a cell switch command.
  • the terminal device may send "first uplink data" to the target cell based on a configured grant (CG) resource.
  • the "first uplink data" may be a confirmation message or an access message used to notify or inform the target cell that the terminal device will switch to the target cell.
  • the target cell After receiving the first uplink data, the target cell may send a DCI with scheduling information to the terminal device through a PDCCH (Physical Downlink Control Channel). After receiving the scheduling information, or receiving the predefined information transmitted in the resources scheduled by the DCI, the terminal device may determine that the switching is complete.
  • PDCCH Physical Downlink Control Channel
  • the above-mentioned CG resources can be a pre-configured CG PUSCH (Physical Uplink Shared Channel).
  • CG PUSCH Physical Uplink Shared Channel
  • the beam may also be called beam, Quasi co-location (QCL) Type D, spatial setting, spatial filter, spatial relation info, spatial RX parameters, spatial Tx parameter, Transmission Configuration Indication state (TCI state for short), etc., which is not limited in the embodiments of the present disclosure.
  • QCL Quasi co-location
  • Tx Transmission Configuration Indication state
  • the beam can be determined based on a TCI state, which can include a quasi-co-located QCL source and a QCL type.
  • a TCI state which can include a quasi-co-located QCL source and a QCL type.
  • Different QCL types contain different channel parameters.
  • the signals have the same channel parameters (channel parameters included in the QCL type).
  • the channel parameters may include one or more of Doppler Shift, Doppler Spread, Average Delay, Delay Spread, and Spatial Rx parameters.
  • the QCL type can be any of the following:
  • the channel parameters included in this QCL Type A are Doppler frequency deviation, Doppler spread, average delay and delay spread;
  • QCL Type B The channel parameters included in this QCL Type B are Doppler frequency deviation and Doppler spread;
  • QCL Type C The channel parameters included in this QCL Type C are average delay and Doppler frequency deviation;
  • QCL Type D The channel parameters contained in the QCL Type D are spatial reception parameters.
  • the QCL Type D can be used to indicate beam information, i.e., spatial reception parameters. Assuming beam correspondence, the spatial transmission parameters and spatial reception parameters of the terminal device are the same.
  • the source cell may indicate the beam of the target cell to the terminal device so that the terminal device can access the target cell through the beam.
  • one or more TCI states of the candidate cell may be configured in advance for the terminal device through pre-configuration.
  • the source cell may activate part or all of the preconfigured TCI states before sending a cell switching control, and indicate the TCI state of the target cell while triggering the switching through the cell switching control (cell switch command), where the TCI state indicates the beam (transmission beam) of the target cell.
  • the source cell may not activate the TCI state in advance, but directly indicate the activation of a TCI state when the cell switch command indicates the triggering of the switch.
  • the TCI state can be used to determine the transmission beam of the terminal device and the target cell.
  • Fig. 1B is a schematic diagram showing a configuration information according to an embodiment of the present disclosure.
  • the network device may send configuration information to the terminal device, and the configuration information may include serving cell configuration and handover configuration.
  • the serving cell configuration may include a third TCI set, which may include one or more TCI states of the serving cell itself.
  • the handover configuration may also be referred to as an LTM configuration, and the handover configuration may include parameters of a first TCI set and at least one candidate cell.
  • the first TCI set may be referred to as the LTM TCI state pool.
  • the parameters of the candidate cell may include a second TCI set, which may include one or more TCI states of the candidate cell itself.
  • a second TCI set which may include one or more TCI states of the candidate cell itself.
  • candidate cell-1 corresponds to the second TCI set-1
  • candidate cell-2 corresponds to the second TCI set-2.
  • the above configuration information may be referred to as RRC pre-configuration.
  • the RRC pre-configuration may be RRC reconfiguration (RRCReconfiguration) or other configuration information.
  • the terminal device needs to use a corresponding beam to perform signal transmission (such as data or signaling transmission) after switching to the target cell. Therefore, how to determine the transmission beam becomes a problem that needs to be solved urgently.
  • FIG2A is an interactive schematic diagram of a beam indication method according to an embodiment of the present disclosure.
  • the method may be performed by the above communication system. As shown in FIG2A , the method may include:
  • Step S2101 The first network device sends second information to the terminal device.
  • the terminal device may receive the second information.
  • the terminal device may receive the second information sent by the first network device.
  • the first network device is a network device corresponding to a service cell of the terminal device.
  • the second information may include parameters of a first TCI set and a candidate cell preconfigured by the first network device for the terminal device, and the first TCI set may include a TCI state corresponding to the candidate cell, and the candidate cell is configured by the first network device for the terminal device.
  • the second information can be used to configure a first TCI set for the terminal device.
  • the second information may be used to configure parameters (eg, RRC parameters) of one or more candidate cells for the terminal device.
  • the second information may be used to configure configuration information related to cell switching (eg, LTM switching) for the terminal device.
  • cell switching e.g, LTM switching
  • the name of the second information is not limited, for example, it can be “configuration information”, “pre-configuration information”, “switching pre-configuration information”, “LTM pre-configuration information”, “TCI pre-configuration information”, “RRC pre-configuration information”, etc.
  • the first TCI set may include one or more TCI states for beam measurement.
  • the first TCI set may include TCI states corresponding to candidate cells, and the candidate cells may be cells configured by the first network device for performing beam measurement for the terminal device.
  • a candidate cell may correspond to one or more TCI states
  • the first TCI set may include N candidate cells, each candidate cell corresponds to at least one TCI state, for a total of M TCI states, where M and N are both positive integers, and M may be greater than or equal to N.
  • the name of the first TCI set is not limited, for example, it can be "LTM TCI state pool”, “LTM TCI state list”, “TCI state set for signal measurement”, “TCI state set for LTM combination”, “TCI state list for LTM”, “TCI states for beam indication during switching”, etc.
  • the TCI state in the first TCI set may include a quasi-co-located QCL source
  • the QCL source may include at least one of the following:
  • the CSI-RS may be a Tracking Reference Signal (TRS).
  • TRS Tracking Reference Signal
  • the information of the TRS may be independently configured, and the QCL source of the TRS may be the SSB measured by L1.
  • the first TCI set may be independent of the second TCI set, wherein a second TCI set is a TCI set of a candidate cell itself.
  • the TCI status of each candidate cell in the first TCI set may be the same as the TCI status configuration of each candidate cell itself.
  • the first TCI set may be associated with the TCI state of the candidate cell itself. For example:
  • the TCI state corresponding to each candidate cell in the first TCI set may be part or all of the second TCI set corresponding to the candidate cell itself.
  • the TCI state configuration parameters in the first TCI set may be the same as the TCI state configuration parameters of the candidate cells.
  • the TCI state corresponding to each candidate cell in the first TCI set may be part or all of the second TCI set of each candidate cell.
  • the first TCI set may be a set that is the same as the TCI state of the candidate cell but is configured separately.
  • the first TCI set may be a separate information field in the second information
  • the TCI state of the candidate cell is also a separate information field
  • the content in the information field of the first TCI set is the same as the TCI state of the candidate cell.
  • the first TCI set may include at least one TCI identifier, and one TCI identifier corresponds to a TCI state in the second TCI set of a candidate cell.
  • the first TCI set may only include an identification list of each candidate cell, corresponding to the TCI state configured under each candidate cell.
  • the first network device may acquire and process the RRC parameters of each candidate cell in advance to obtain the TCI status and CSI-RS configuration, and then perform beam indication.
  • the actual first TCI set (LTM TCI state) may not exist, and the beam during and after switching may actually be determined by the TCI state of the target cell itself.
  • the TCI state can be determined.
  • the first network device may send a second message, and the second message may include the second information.
  • the first network device may send the second message to the terminal device.
  • the terminal device may receive the second message.
  • the second message may include a radio resource control RRC (Radio Resource Control) message, a media access control control element MAC CE (Medium Access Control Control Element), a downlink control information DCI (Downlink Control Information), or at least one of other messages sent by the first network device to the terminal device.
  • RRC Radio Resource Control
  • MAC CE Medium Access Control Control Element
  • DCI Downlink Control Information
  • the second message is an RRC message.
  • step S2101 may be omitted, and the terminal device may autonomously implement the function indicated by the second information, or the above function may be default or default.
  • the terminal device may autonomously obtain the above first TCI set, or obtain the above first TCI set based on other messages.
  • Step S2102 The terminal device performs signal measurement.
  • the terminal device may perform beam measurement on the candidate cell according to a preconfigured measurement reference signal.
  • the beam measurement may be a measurement used for cell switching.
  • the beam measurements may be measurements for LTM.
  • the name of the signal measurement is not limited, for example, it can be “beam measurement”, “L1 measurement”, “LTM-based measurement”, “L1-RSRP measurement”, etc.
  • Step S2103 The terminal device sends a first measurement report to the first network device.
  • the first network device may receive the first measurement report.
  • the first network device may receive the first measurement report sent by the terminal device.
  • the first measurement report can be used to report beam measurement results of each candidate cell or a candidate cell and a serving cell to the first network device.
  • the name of the first measurement report is not limited, and may be, for example, “LTM measurement report”, “measurement result information”, etc.
  • the terminal device may send a first report message, and the first report message may include the first measurement report.
  • the terminal device may send the first report message to the first network device.
  • the first network device may receive the first report message.
  • Step S2104 The first network device sends third information to the terminal device.
  • the terminal device may receive the third information.
  • the terminal device may receive the third information sent by the first network device. interest.
  • the third information may be a TCI state corresponding to one or more candidate cells in the first TCI set activated by the terminal device.
  • the third information may be to activate at least one TCI state in the first TCI set for the terminal device.
  • the third information can be used to instruct the terminal device to activate at least one TCI state in the first TCI set.
  • the third information can be used to instruct the terminal device to activate at least one TCI state for signal measurement.
  • the name of the third information is not limited, for example, it can be "TCI status activation information", “information for activating TCI status”, “activation information”, etc.
  • the first network device may determine at least one TCI state to be activated based on the first measurement report, and send the third information to activate the TCI state through the third information. For example, the candidate cell most likely to be switched or the candidate cell with the strongest signal strength is selected based on the first measurement report, and one or more TCI states under the selected candidate cell are used as the TCI state to be activated.
  • the first network device may autonomously determine at least one TCI state to be activated and send the third information.
  • the first network device may send a third message, and the third message may include the third information.
  • the first network device may send the third message to the terminal device.
  • the terminal device may receive the third message.
  • the third message may include at least one of an RRC message, a MAC CE, a DCI, or other messages sent by the first network device to the terminal device.
  • the third message is MAC CE or DCI.
  • step S2104 may be omitted.
  • Step S2105 The first network device sends first information to the terminal device.
  • the terminal device may receive the first information.
  • the terminal device may receive the first information sent by the first network device.
  • the first information may trigger the terminal device to switch to the target cell or perform a switch to the target cell.
  • the name of the first information is not limited, for example, it can be "cell switch command”, “switch indication”, “switch command”, etc.
  • the terminal device may switch to the target cell based on RACH-less switching.
  • the first information may include a first identifier and/or a second identifier, wherein: the first identifier may be a cell identifier of the target cell, and the second identifier may be used to determine the first TCI state.
  • the first TCI state may indicate a first beam, which may be a beam used by the terminal device when performing a handover to a target cell.
  • the first TCI state may be a TCI state in a first TCI set, for example:
  • the first TCI state may be at least one of the TCI states corresponding to the target cell in the first TCI set.
  • the first TCI state may be at least one of the TCI states in the first TCI set that is in an activated state and corresponds to the target cell.
  • the first TCI state may be a TCI state corresponding to the target cell.
  • the first network device may determine the target cell and use at least one of the TCI states corresponding to the target cell as the first TCI state. For example, the first network device may determine the target cell and the first TCI state of the target cell based on beam measurement, for example, the candidate cell with the strongest signal strength may be used as the target cell for switching. For another example, the first network device may determine the target cell based on other determination criteria.
  • the first network device may send a first message, and the first message may include the first information.
  • the first network device may send the first message to the terminal device.
  • the terminal device may receive the first message.
  • the first message may also include the third information.
  • the first message may include at least one of an RRC message, a MAC CE, a DCI, or other messages sent by the first network device to the terminal device.
  • the first message is MAC CE or DCI.
  • Step S2106 The terminal device determines the first TCI state.
  • the terminal device may determine the first TCI state based on the first information.
  • the terminal device may determine a first TCI state in response to receiving the first information.
  • the terminal device can determine the first TCI state based on the second identifier in the first message.
  • the terminal device may determine the first beam according to the first TCI state, and use the first beam to transmit signals during the handover to the target cell. For example, the terminal device may use the first beam to send signals to the target cell, or receive signals from the target cell.
  • Step S2107 The terminal device sends seventh information to the second network device.
  • the second network device may receive the seventh information.
  • the second network device may receive the seventh information sent by the terminal device. Seven messages.
  • the second network device may be a network device corresponding to the target cell.
  • the seventh information can be used to instruct the terminal device to access the second network device.
  • the seventh information may be an access message or a confirmation message.
  • the name of the seventh information is not limited, and may be, for example, "access message”, “confirmation message”, “switching indication”, “access indication”, “first uplink data”, “First UL data”, etc.
  • the terminal device may send the seventh information through the first beam.
  • the second network device may also receive the seventh information through the first beam.
  • Step S2108 The second network device sends fourth information to the terminal device.
  • the terminal device may receive the fourth information.
  • the terminal device may receive the fourth information sent by the second network device.
  • the fourth information may be used to indicate that the seventh information sent by the terminal device is successfully received by the target cell.
  • the fourth information can be used to determine whether the terminal device has successfully switched to the target cell.
  • the fourth information can be used to indicate that the terminal device has successfully switched to the target cell.
  • the name of the fourth information is not limited, for example, it can be “switching completion information”, “switching success information”, “first PDCCH scheduling”, etc.
  • the second network device may send the fourth information through the first beam.
  • the terminal device may also receive the fourth information through the first beam.
  • the fourth information may be a DCI of the first scheduled resource received by the terminal device on the target cell.
  • the resource scheduled by the fourth information may be a PUSCH or PDSCH resource.
  • the fourth information is scheduled on a PDSCH and transmits preset information.
  • the fourth information may be preset information specified by a protocol and transmitted on a PDSCH scheduled by the fourth information sent by the target cell.
  • Step S2109 The second network device sends the eighth information to the terminal device.
  • the terminal device may receive the eighth information.
  • the terminal device may receive the eighth information sent by the second network device.
  • the eighth information may be used to indicate a sixth TCI state.
  • the eighth information is transmitted on the PDSCH scheduled by the fourth information.
  • the terminal device can determine the sixth TCI state based on the eighth information and keep the sixth TCI state activated.
  • step S2109 is an optional step, and the terminal device can autonomously determine the sixth TCI state in response to receiving the fourth information.
  • the sixth TCI state may be at least one of the fourth TCI states, and the fourth TCI state may be a TCI state in which the terminal device remains in an active state after switching.
  • the fourth TCI state may be kept activated.
  • the fourth TCI state may include any one of the following:
  • a TCI state in the first TCI set that is in an activated state and corresponds to the target cell
  • An activated TCI state in the first TCI set may be the fourth TCI state.
  • the terminal device can use the first beam indicated by the first TCI state.
  • the fourth TCI state may be a TCI state that is in an activated state in the first TCI set and corresponds to the target cell.
  • the terminal device can deactivate all activated TCI states of other candidate cells, but maintain the activated TCI state of the target cell.
  • identification information may be included in the above, the second information or the third information, and the identification information may be used to determine which candidate cell the TCI state in the first TCI set corresponds to, or which candidate cell the activated TCI state corresponds to, or which candidate cell the indicated TCI state corresponds to.
  • the target cell may indicate a TCI state in the fourth TCI state for updating the transmission beam.
  • the fourth TCI state may be an activated TCI state in the first TCI set.
  • the terminal device can retain all activated TCI states in the first TCI set to support subsequent LTM.
  • the target cell may indicate the TCI state corresponding to the target cell in the fourth TCI state for updating the transmission beam.
  • explicit deactivation signaling may be defined, for example, the second network device may deactivate the TCI state through the fifth information.
  • the target cell may indicate its own TCI status.
  • the second network device indicates its own TCI status to the terminal device via the sixth information.
  • different fourth TCI states may be determined corresponding to different designs of the first TCI set. For example:
  • the first TCI set may be designed independently (not associated with the second TCI set of the candidate cell), and the QCL source is SSB.
  • the fourth TCI state can be kept activated, where the fourth TCI state is the first TCI state.
  • the first TCI set may be independently designed (not associated with the second TCI set of the candidate cell), and the QCL source is a CSI-RS (eg, TRS).
  • CSI-RS eg, TRS
  • the fourth TCI state is any one of the following: the first TCI state; a TCI state in the first TCI set that is activated and corresponds to the target cell; a TCI state in the first TCI set that is activated.
  • the first TCI set may be associated with a second TCI set of the candidate cell, and the first TCI set may be a union of at least one second TCI set, where a second TCI set is a TCI set of the candidate cell itself.
  • the fourth TCI state is any one of the following: a TCI state that is activated in the first TCI set and corresponds to the target cell; a TCI state that is activated in the first TCI set.
  • the first TCI set may be associated with the second TCI set of the candidate cell, and the first TCI set may include at least one TCI identifier, where one TCI identifier corresponds to one TCI state in the second TCI set.
  • the fourth TCI state is any one of the following: a TCI state that is activated in the first TCI set and corresponds to the target cell; a TCI state that is activated in the first TCI set.
  • Step S2110 The terminal device determines the second TCI state.
  • the second TCI state may indicate a second beam, which may be a beam used by the terminal device after switching to the target cell.
  • the terminal device may send data and/or signaling to the target cell through the second beam after successfully switching to the target cell.
  • the second TCI state may be the same as or different from the first TCI state.
  • the second TCI state may be the first TCI state described above.
  • the second TCI state may be the sixth TCI state, that is, the TCI state indicated by the eighth information.
  • the second TCI state may be at least one of the TCI states in the first TCI set that is in an activated state and corresponds to the target cell and is different from the first TCI state.
  • the second TCI state may be at least one of the TCI states in the first TCI set that is in an activated state and corresponds to the target cell, for example, other TCI states except the above-mentioned first TCI state and sixth TCI state.
  • Step S2111 The second network device sends fifth information to the terminal device.
  • the terminal device may receive the fifth information.
  • the terminal device may receive the fifth information sent by the second network device.
  • the fifth information can be used to instruct the terminal device to deactivate the TCI state.
  • the fifth information can be used to instruct the terminal device to deactivate the third TCI state.
  • the third TCI state may be all or part of the TCI states in the first TCI set.
  • the third TCI state may be a subset or a full set of the TCI states in the first TCI set that are in an activated state.
  • the third TCI state may be a TCI state that is currently in an activated state and the network device determines that it does not need to remain activated (eg, a TCI state that is currently not used for data transmission).
  • the third TCI state does not include the second TCI state.
  • the third TCI state may be other TCI state among the activated TCI states in the first TCI set except for the second TCI state.
  • the name of the fifth information is not limited, for example, it can be “deactivation information”, “deactivation signaling”, “TCI state deactivation signaling”, etc.
  • the corresponding TCI state can be deactivated through the fifth information, avoiding the terminal device from maintaining too many TCI states activated, reducing the power consumption of the terminal device, and improving the performance of the terminal device.
  • the second network device may send a fifth message, and the fifth message may include the fifth information.
  • the second network device may send the fifth message to the terminal device.
  • the terminal device may receive the fifth message.
  • the fifth message may include at least one of an RRC message, a MAC CE, a DCI, or other messages sent by the second network device to the terminal device.
  • the fifth information may be MAC CE or DCI.
  • step S2111 may be omitted, and the terminal device may autonomously implement the function indicated by the fifth information, or the above function may be default or acquiescent.
  • the terminal device may autonomously deactivate the third TCI state.
  • Step S2112 The second network device sends sixth information to the terminal device.
  • the terminal device may receive the sixth information.
  • the terminal device may receive the sixth information sent by the second network device.
  • the sixth information may indicate a fifth TCI state
  • the fifth TCI state may be the TCI state of the target cell itself.
  • the sixth information can be used to activate the fifth TCI state for the terminal device.
  • the sixth information can be used to indicate the fifth TCI state for the terminal device.
  • the name of the sixth information is not limited, for example, it can be "TCI status configuration information", “TCI status activation information”, “TCI status indication information”, etc.
  • the terminal device after receiving the sixth information, can deactivate the second TCI state and activate the fifth TCI state.
  • the terminal device after receiving the sixth information, can deactivate all TCI states except the fifth TCI state.
  • the second network device may send a sixth message, and the sixth message may include the sixth information.
  • the second network device may send the sixth message to the terminal device.
  • the terminal device may receive the sixth message.
  • the sixth message may include at least one of an RRC message, a MAC CE, a DCI, or other messages sent by the second network device to the terminal device.
  • step S2112 may be omitted.
  • the terminal device may always use the second TCI state.
  • step S2105 can be implemented as an independent embodiment
  • step S2110 can be implemented as an independent embodiment
  • steps S2105+S2106+S2110 can be implemented as an independent embodiment
  • steps S2101+S2104+S2105+S2106+S2108+S2110 can be implemented as an independent embodiment
  • steps S2101+S2104+S2105+S2106+S2107+S2108+S2110 can be implemented as an independent embodiment
  • steps S2101+S2104+S2105+S2106+S2107+S2108+S2110 can be implemented as an independent embodiment
  • steps S2101+S2104+S2105+S2106+S2107+S2108+S2110 can be implemented as an independent embodiment.
  • steps S2101+S2104+S2105+S2106+S2107+S2108+S2110+S2111+S2112 can be implemented as an independent embodiment
  • steps S2105+S2106+S2107+S2108+S2110 can be implemented as an independent embodiment
  • steps S2105+S2106+S2107+S2108+S2110 can be implemented as an independent embodiment
  • steps S2105+S2106+S2107+S2108+S2110 can be implemented as an independent embodiment
  • 07+S2108+S2110+S2112 can be implemented as an independent embodiment
  • steps S2105+S2106+S2107+S2108+S2110+S2111 can be implemented as an independent embodiment
  • steps S2105+S2106+S2107+S2108+S2110+S2111+S2112 can be implemented as an independent embodiment, but are not limited to this.
  • the above steps S2101 to S2112 can be executed in a swapped order or simultaneously.
  • the above steps S2101 to S2112 are all optional steps.
  • the terminal device can use the first beam to switch to the target cell during the switching process, use the second beam to transmit signals after switching to the target cell, and deactivate or activate the TCI state according to the instructions of the target cell after switching, thereby providing a flexible beam indication and control method, which can improve the switching success rate and communication efficiency.
  • FIG2B is an interactive schematic diagram of a beam indication method according to an embodiment of the present disclosure.
  • the embodiment of the present disclosure relates to a beam indication method, which can be performed by a communication system, and the method can include:
  • Step S2201 The first network device sends second information to the terminal device.
  • step S2201 can refer to the optional implementation of step S2101 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S2202 The first network device sends third information to the terminal device.
  • step S2202 can refer to the optional implementation of step S2104 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S2203 The first network device sends first information to the terminal device.
  • step S2203 can refer to the optional implementation of step S2105 in FIG. 2A and the implementation involved in FIG. 2A. Other related parts in the example will not be repeated here.
  • Step S2204 The terminal device determines the first TCI state.
  • step S2204 can refer to the optional implementation of step S2106 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S2205 The terminal device sends seventh information to the second network device.
  • step S2205 can refer to the optional implementation of step S2107 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S2206 The second network device sends fourth information to the terminal device.
  • step S2206 can refer to the optional implementation of step S2108 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S2208 The terminal device determines the second TCI state.
  • step S2208 can refer to the optional implementation of step S2110 in FIG. 2A and other related parts of the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S2208 The second network device sends sixth information to the terminal device.
  • step S2208 can refer to the optional implementation of step S2112 in FIG. 2A and other related parts of the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the above steps S2201 to S2208 can be executed in a swapped order or simultaneously.
  • the above steps S2201 to S2208 are all optional steps.
  • the embodiment shown in FIG. 2B may also be combined with any one or more steps in the embodiment shown in FIG. 2A as a new embodiment.
  • the terminal device can use the first beam to switch to the target cell during the switching process, use the second beam to transmit signals after switching to the target cell, and activate the TCI state of the target cell according to the instructions of the target cell after switching, thereby improving the switching success rate and communication efficiency.
  • FIG2C is an interactive schematic diagram of a beam indication method according to an embodiment of the present disclosure.
  • an embodiment of the present disclosure relates to a beam indication method, which may be performed by a communication system, and the method may include:
  • Step S2301 A first network device sends first information to a terminal device.
  • step S2301 can refer to the optional implementation of step S2105 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S2302 The terminal device determines the first TCI state.
  • step S2302 can refer to the optional implementation of step S2106 in FIG. 2A and other related parts of the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S2303 The terminal device determines the second TCI state.
  • step S2303 can refer to the optional implementation of step S2110 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the above steps S2301 to S2303 can be executed in a swapped order or simultaneously.
  • the above steps S2301 to S2303 are all optional steps.
  • the embodiment shown in FIG. 2C may also be combined with any one or more steps in the embodiment shown in FIG. 2A as a new embodiment.
  • the terminal device can determine the second beam to be used after switching to the target cell, so that the terminal device switches to the target cell and communicates through the target cell, thereby improving the switching success rate and communication efficiency.
  • FIG3A is a flow chart of a beam indication method according to an embodiment of the present disclosure. As shown in FIG3A , the embodiment of the present disclosure relates to a beam indication method, which can be performed by a terminal device. The method may include:
  • Step S3101 obtain second information.
  • step S3101 can refer to the optional implementation of step S2101 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the terminal device may receive the second information sent by the first network device, but is not limited thereto, and the terminal device may also receive the second information sent by other entities.
  • the terminal device may obtain second information specified by the protocol.
  • the terminal device can obtain the second information from the upper layer(s).
  • the terminal device may perform processing to obtain the second information.
  • step S3101 may be omitted, and the terminal device may autonomously implement the function indicated by the second information, or the above function may be default or acquiescent.
  • Step S3102 perform signal measurement.
  • step S3102 can refer to the optional implementation of step S2102 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S3103 Send a first measurement report.
  • step S3103 can refer to the optional implementation of step S2103 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the terminal device may send the first measurement report to the first network device, but is not limited thereto, and the terminal device may also send the first measurement report to other entities.
  • Step S3104 Obtain third information.
  • step S3104 can refer to the optional implementation of step S2104 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the terminal device may receive the third information sent by the first network device, but is not limited thereto, and the terminal device may also receive the third information sent by other entities.
  • the terminal device may obtain third information specified by the protocol.
  • the terminal device can obtain third information from upper layer(s).
  • the terminal device may perform processing to obtain the third information.
  • step S3104 may be omitted, and the terminal device may autonomously implement the function indicated by the third information, or the above function may be default or acquiescent.
  • Step S3105 Obtain first information.
  • step S3105 can refer to the optional implementation of step S2105 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the terminal device may receive the first information sent by the first network device, but is not limited thereto, and the terminal device may also receive the first information sent by other entities.
  • the terminal device may obtain first information specified by the protocol.
  • the terminal device can obtain the first information from an upper layer(s).
  • the terminal device may perform processing to obtain the first information.
  • step S3105 may be omitted, and the terminal device may autonomously implement the function indicated by the first information, or the above function may be default or acquiescent.
  • Step S3106 Determine the first TCI state.
  • step S3106 can refer to the optional implementation of step S2106 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S3107 sending the seventh information.
  • step S3107 can refer to the optional implementation of step S2107 in FIG. 2A and other related parts of the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the terminal device may send the seventh information to the second network device, but is not limited thereto, and the terminal device may also send the seventh information to other entities.
  • Step S3108 Obtain fourth information.
  • step S3108 can refer to the optional implementation of step S2108 in FIG. 2A and other related parts of the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the terminal device may receive the fourth information sent by the second network device, but is not limited thereto, and the terminal device may also receive the fourth information sent by other entities.
  • the terminal device may obtain fourth information specified by the protocol.
  • the terminal device can obtain the fourth information from the upper layer(s).
  • the terminal device may perform processing to obtain the fourth information.
  • step S3108 may be omitted, and the terminal device may autonomously implement the function indicated by the fourth information, or the above function may be default or acquiescent.
  • Step S3110 determine the second TCI state.
  • step S3110 can refer to the optional implementation of step S2110 in FIG. 2A and other related parts of the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S3111 obtain the fifth information.
  • step S3111 can refer to the optional implementation of step S2111 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the terminal device may receive the fifth information sent by the second network device, but is not limited thereto, and the terminal device may also receive the fifth information sent by other entities.
  • the terminal device may obtain fifth information specified by the protocol.
  • the terminal device can obtain the fifth information from the upper layer(s).
  • the terminal device may perform processing to obtain the fifth information.
  • step S3111 may be omitted, and the terminal device may autonomously implement the function indicated by the fifth information, or the above function may be default or acquiescent.
  • Step S3112 Obtain sixth information.
  • step S3112 can refer to the optional implementation of step S2112 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the terminal device may receive the sixth information sent by the second network device, but is not limited thereto, and the terminal device may also receive the sixth information sent by other entities.
  • the terminal device may obtain sixth information specified by the protocol.
  • the terminal device can obtain the sixth information from the upper layer(s).
  • the terminal device may perform processing to obtain the sixth information.
  • step S3112 may be omitted, and the terminal device may autonomously implement the function indicated by the sixth information, or the above function may be default or acquiescent.
  • step S3105 can be implemented as an independent embodiment
  • step S3110 can be implemented as an independent embodiment
  • steps S3105+S3106+S3110 can be implemented as an independent embodiment
  • steps S3101+S3104+S3105+S3106+S3108+S3110 can be implemented as an independent embodiment
  • steps S3101+S3104+S3105+S3106+S3107+S3108+S3110 can be implemented as an independent embodiment
  • steps S3101+S3104+S3105+S3106+S3107+S3108+S3110 can be implemented as an independent embodiment
  • steps S3101+S3104+S3105+S3106+S3107+S3108+S3110 can be implemented as an independent embodiment.
  • steps S3101+S3104+S3105+S3106+S3107+S3108+S3110+S3111+S3112 can be implemented as an independent embodiment
  • steps S3105+S3106+S3107+S3108+S3110 can be implemented as an independent embodiment
  • steps S3105+S3106+S3111+S3112 can be implemented as an independent embodiment.
  • 07+S3108+S3110+S3112 can be implemented as an independent embodiment
  • steps S3105+S3106+S3107+S3108+S3110+S3111 can be implemented as an independent embodiment
  • steps S3105+S3106+S3107+S3108+S3110+S3111+S3112 can be implemented as an independent embodiment, but are not limited to this.
  • the above steps S3101 to S3112 can be executed in a swapped order or simultaneously.
  • the above steps S3101 to S3112 are all optional steps.
  • the terminal device can use the first beam to switch to the target cell during the switching process, use the second beam to transmit signals after switching to the target cell, and deactivate or activate the TCI state according to the instructions of the target cell after switching, thereby providing a flexible beam indication and control method, which can improve the switching success rate and communication efficiency.
  • FIG3B is a flow chart of a beam indication method according to an embodiment of the present disclosure. As shown in FIG3B , the embodiment of the present disclosure relates to a beam indication method, which can be performed by a terminal device. The method may include:
  • Step S3201 obtain second information.
  • step S3201 can refer to step S2101 in FIG. 2A , the optional implementation of step S3101 in FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.
  • Step S3202 Obtain third information.
  • step S3202 can refer to step S2104 of FIG. 2A , the optional implementation of step S3104 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.
  • Step S3203 Obtain first information.
  • step S3203 can refer to step S2105 of FIG. 2A , the optional implementation of step S3105 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.
  • Step S3204 determine the first TCI state.
  • step S3204 can refer to step S2106 of FIG. 2A , the optional implementation of step S3106 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.
  • Step S3205 sending the seventh information.
  • step S3205 can refer to step S2107 in FIG. 2A , the optional implementation of step S3107 in FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.
  • Step S3206 Obtain fourth information.
  • step S3206 can refer to step S2108 in FIG. 2A , the optional implementation of step S3108 in FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.
  • Step S3207 determine the second TCI state.
  • step S3207 can refer to step S2110 of FIG. 2A , the optional implementation of step S3110 of FIG. 3A , and As for other related parts in the embodiments involved in FIG. 2A and FIG. 3A, they will not be described in detail here.
  • Step S3208 obtain sixth information.
  • step S3208 can refer to step S2112 of FIG. 2A , the optional implementation of step S3112 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.
  • the above steps are all optional steps.
  • the above steps may be performed in a swapped order or simultaneously.
  • the embodiment shown in FIG. 3B may also be combined with any one or more steps in the embodiment shown in FIG. 3A as a new embodiment.
  • the terminal device can use the first beam to switch to the target cell during the switching process, use the second beam to transmit signals after switching to the target cell, and activate the TCI state of the target cell according to the instructions of the target cell after switching, thereby improving the switching success rate and communication efficiency.
  • FIG3C is a flow chart of a beam indication method according to an embodiment of the present disclosure. As shown in FIG3C , the embodiment of the present disclosure relates to a beam indication method, which can be performed by a terminal device. The method may include:
  • Step S3301 obtain first information.
  • step S3301 can refer to step S2105 of FIG. 2A , the optional implementation of step S3105 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.
  • the first information triggers the terminal device to perform a switch to a target cell
  • the first network device is a network device corresponding to a current serving cell of the terminal device.
  • Step S3302 Determine the first TCI state.
  • step S3302 can refer to step S2106 of FIG. 2A , the optional implementation of step S3106 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.
  • the first TCI state indicates a first beam
  • the first beam is a beam used by the terminal device when performing a handover to the target cell.
  • Step S3303 Determine the second TCI state.
  • step S3303 can refer to step S2110 of FIG. 2A , the optional implementation of step S3110 of FIG. 3A , and other related parts in the embodiments involved in FIG. 2A and FIG. 3A , which will not be described in detail here.
  • the second TCI state indicates a second beam, where the second beam is a beam used by the terminal device after switching to the target cell, and the second TCI state is the same as or different from the first TCI state.
  • the above steps are all optional steps.
  • the above steps may be performed in a swapped order or simultaneously.
  • the embodiment shown in FIG. 3C may also be combined with any one or more steps in the embodiment shown in FIG. 3A as a new embodiment.
  • the terminal device can determine the second beam to be used after switching to the target cell, so that the terminal device switches to the target cell and communicates through the target cell, thereby improving the switching success rate and communication efficiency.
  • the first information includes a first identifier and/or a second identifier
  • the first identifier is a cell identifier of the target cell
  • the second identifier is used to determine the first TCI state.
  • the method further comprises:
  • Receive second information sent by the first network device the second information including parameters of a first TCI set and a candidate cell preconfigured by the first network device for the terminal device, the first TCI set including a TCI state corresponding to the candidate cell, and the candidate cell being a cell configured by the first network device for beam measurement for the terminal device.
  • the method further comprises:
  • the third information is the TCI state corresponding to the activation of one or more candidate cells in the first TCI set by the terminal device.
  • the first TCI state is any one of the following:
  • the second TCI state is any one of the following:
  • At least one of the TCI states in the first TCI set that is activated and corresponds to the target cell is different from the first TCI state.
  • the method further comprises:
  • the fourth information is the first scheduled new transmission of the terminal device on the target cell; or, the fourth information is preset information, and the preset information is transmitted on the physical downlink shared channel PDSCH scheduled for the first time in the target cell.
  • the method further comprises:
  • the TCI state includes a quasi-co-located QCL source, the QCL source including at least one of the following:
  • the channel state information reference signal CSI-RS of the candidate cell is the channel state information reference signal CSI-RS of the candidate cell.
  • the first TCI set is the union of the second TCI sets of each candidate cell, and the second TCI set is the TCI set of the candidate cell itself; or, the first TCI set includes at least one TCI identifier, and one TCI identifier corresponds to a TCI state in the second TCI set.
  • the method further comprises:
  • the fourth TCI state includes any one of the following:
  • a TCI state in the first TCI set that is in an activated state and corresponds to the target cell
  • the TCI states in the first TCI set are in an activated state.
  • the method further comprises:
  • the sixth information is used to instruct the terminal device to activate the fifth TCI state and deactivate the second TCI state.
  • the terminal device switches to the target cell based on switching without random access.
  • FIG4A is a flow chart of a beam indication method according to an embodiment of the present disclosure.
  • the embodiment of the present disclosure relates to a beam indication method, which can be executed by a first network device, and the method includes:
  • Step S4101 sending the second information.
  • step S4101 can refer to the optional implementation of step S2101 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the first network device may send the second information to the terminal device, but is not limited thereto, and the first network device may also send the second information to other entities.
  • Step S4102 Obtain a first measurement report.
  • step S4102 can refer to the optional implementation of step S2103 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S4103 Send the third information.
  • step S4103 can refer to the optional implementation of step S2104 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the first network device may send the third information to the terminal device, but is not limited thereto, and the first network device may also send the third information to other entities.
  • Step S4104 Send the first information.
  • step S4104 can refer to the optional implementation of step S2105 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the first network device may send the first information to the terminal device, but is not limited thereto, and the first network device may also send the first information to other entities.
  • step S4104 may be implemented as an independent embodiment
  • step S4101 may be implemented as an independent embodiment
  • step S4103 may be implemented as an independent embodiment
  • step S4103+S4104 may be implemented as an independent embodiment
  • step S4101+S4104 may be implemented as an independent embodiment
  • step S4101+S4103+S4104 may be implemented as an independent embodiment
  • step S4101+S4102+S4103+S4104 may be implemented as an independent embodiment, but is not limited thereto.
  • the above steps S4101 to S4104 can be executed in a swapped order or simultaneously.
  • the above steps S4101 to S4104 are all optional steps.
  • the first network device can instruct the terminal device to use the first beam during the switching process, and use the second beam for signal transmission after switching to the target cell, thereby providing a flexible beam indication and control method that can improve the switching success rate and communication efficiency.
  • FIG4B is a flow chart of a beam indication method according to an embodiment of the present disclosure. As shown in FIG4B , the embodiment of the present disclosure relates to a beam indication method, which can be performed by a first network device. The method may include:
  • Step S4201 sending the second information.
  • step S4201 can refer to step S2101 in FIG. 2A , the optional implementation of step S4101 in FIG. 4A , and other related parts in the embodiments involved in FIG. 2A and FIG. 4A , which will not be described in detail here.
  • Step S4202 Send the third information.
  • step S4202 can refer to step S2103 of FIG. 2A , the optional implementation of step S4103 of FIG. 4A , and other related parts in the embodiments involved in FIG. 2A and FIG. 4A , which will not be described in detail here.
  • Step S4203 Send the first information.
  • step S4203 can refer to the optional implementation of step S2105 in FIG. 2A , step S4104 in FIG. 4A , and other related parts in the embodiments involved in FIG. 2A and FIG. 4A , which will not be described in detail here.
  • the above steps are all optional steps.
  • the above steps may be performed in a swapped order or simultaneously.
  • the embodiment shown in FIG. 4B may also be combined with any one or more steps in the embodiment shown in FIG. 4A as a new embodiment.
  • the first network device can instruct the terminal device to use the first beam during the switching process, and use the second beam for signal transmission after switching to the target cell, thereby providing a flexible beam indication and control method that can improve the switching success rate and communication efficiency.
  • FIG4C is a flow chart of a beam indication method according to an embodiment of the present disclosure. As shown in FIG4C , the embodiment of the present disclosure relates to a beam indication method, which can be performed by a first network device. The method may include:
  • Step S4301 sending the first information.
  • step S4301 can refer to the optional implementation of step S2105 in FIG. 2A , step S4104 in FIG. 4A , and other related parts in the embodiments involved in FIG. 2A and FIG. 4A , which will not be described in detail here.
  • the embodiment shown in FIG. 4C may also be combined with any one or more steps in the embodiment shown in FIG. 4A as a new embodiment.
  • the first information triggers the terminal device to perform a switch to a target cell
  • the first network device is a network device corresponding to a current serving cell of the terminal device.
  • the first network device can instruct the terminal device to determine the second beam to be used after switching to the target cell, so that the terminal device switches to the target cell and communicates through the target cell, thereby improving the switching success rate and communication efficiency.
  • the first information includes a first identifier and/or a second identifier
  • the first identifier is a cell identifier of the target cell
  • the second identifier is used to determine a first transmission configuration indication TCI state
  • the first TCI state indicates a first beam
  • the first beam is a beam used by the terminal device after switching to the target cell.
  • the method further comprises:
  • the second information including parameters of a first TCI set and a candidate cell preconfigured by the first network device for the terminal device, the first TCI set including a TCI state corresponding to the candidate cell, and the candidate cell being a cell configured by the first network device for beam measurement for the terminal device.
  • the method further comprises:
  • the first TCI state is any one of the following:
  • the terminal device determines a second beam through a second TCI state, where the second beam is a beam used by the terminal device after switching to the target cell; the second TCI state is any one of the following:
  • At least one of the TCI states in the first TCI set that is activated and corresponds to the target cell is different from the first TCI state.
  • the TCI state includes a quasi-co-located QCL source, the QCL source including at least one of the following:
  • the channel state information reference signal CSI-RS of the candidate cell is the channel state information reference signal CSI-RS of the candidate cell.
  • the first TCI set is the union of the second TCI sets of each candidate cell, and the second TCI set is the TCI set of the candidate cell itself; or, the first TCI set includes at least one TCI identifier, and one TCI identifier corresponds to a TCI state in the second TCI set.
  • the terminal device switches to the target cell based on switching without random access.
  • FIG5A is a flow chart of a beam indication method according to an embodiment of the present disclosure.
  • the embodiment of the present disclosure relates to a beam indication method, which can be performed by a second network device, and the method includes:
  • Step S5101 obtain the seventh information.
  • step S5101 can refer to the optional implementation of step S2107 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • Step S5102 Send the fourth information.
  • step S5102 can refer to the optional implementation of step S2108 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the second network device may send the fourth information to the terminal device, but is not limited thereto, and the second network device may also send the fourth information to other entities.
  • Step S5103 Send the eighth information.
  • step S5103 can refer to the optional implementation of step S2109 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the second network device may send the eighth information to the terminal device, but is not limited thereto, and the second network device may also send the eighth information to other entities.
  • Step S5104 Send the fifth information.
  • step S5104 can refer to the optional implementation of step S2111 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the second network device may send the fifth information to the terminal device, but is not limited thereto, and the second network device may also send the fifth information to other entities.
  • Step S5105 Send the sixth information.
  • step S5105 can refer to the optional implementation of step S2112 in FIG. 2A and other related parts in the embodiment involved in FIG. 2A , which will not be described in detail here.
  • the second network device may send the sixth information to the terminal device, but is not limited thereto, and the second network device may also send the sixth information to other entities.
  • step S5102 may be implemented as an independent embodiment
  • step S5104 may be implemented as an independent embodiment
  • step S5105 may be implemented as an independent embodiment
  • step S5101+S5102 may be implemented as an independent embodiment
  • step S5102+S5105 may be implemented as an independent embodiment
  • step S5101+S5102+S5104 may be implemented as an independent embodiment
  • step S5101+S5102+S5105 may be implemented as an independent embodiment, but is not limited thereto.
  • the above steps S5101 to S5105 can be executed in a swapped order or simultaneously.
  • the above steps S5101 to S5105 are all optional steps.
  • the second network device can instruct the terminal device to successfully switch to the target cell, provide signal transmission for the terminal device through the second beam, and instruct the terminal device to deactivate or activate the TCI state after switching, thereby providing a flexible beam indication and control method, which can improve the switching success rate and communication efficiency.
  • FIG5B is a flow chart of a beam indication method according to an embodiment of the present disclosure. As shown in FIG5B , the embodiment of the present disclosure relates to a beam indication method, which can be performed by a second network device. The method may include:
  • Step S5201 obtain the seventh information.
  • step S5201 can refer to step S2107 of FIG. 2A , the optional implementation of step S5101 of FIG. 5A , and other related parts in the embodiments involved in FIG. 2A and FIG. 5A , which will not be described in detail here.
  • Step S5202 Send the fourth information.
  • step S5202 can refer to step S2108 of FIG. 2A , the optional implementation of step S5102 of FIG. 5A , and other related parts in the embodiments involved in FIG. 2A and FIG. 5A , which will not be described in detail here.
  • Step S5203 Send the sixth information.
  • step S5203 can refer to the optional implementation of step S2112 in FIG. 2A , step S5105 in FIG. 5A , and other related parts in the embodiments involved in FIG. 2A and FIG. 5A , which will not be described in detail here.
  • the above steps are all optional steps.
  • the above steps may be performed in a swapped order or simultaneously.
  • the embodiment shown in FIG. 5B may also be combined with any one or more steps in the embodiment shown in FIG. 5A as a new embodiment.
  • the second network device can instruct the terminal device to successfully switch to the target cell, provide signal transmission for the terminal device through the second beam, and instruct the terminal device to activate the TCI state after switching, thereby providing a flexible beam indication and control method, which can improve the switching success rate and communication efficiency.
  • FIG5C is a flow chart of a beam indication method according to an embodiment of the present disclosure. As shown in FIG5C , the embodiment of the present disclosure relates to a beam indication method, which can be performed by a second network device. The method may include:
  • Step S5301 sending the fourth information.
  • step S5301 can refer to step S2108 of FIG. 2A , the optional implementation of step S5102 of FIG. 5A , and other related parts in the embodiments involved in FIG. 2A and FIG. 5A , which will not be described in detail here.
  • the embodiment shown in FIG. 5C may also be combined with any one or more steps in the embodiment shown in FIG. 5A as a new embodiment.
  • the fourth information is used to determine that the terminal device has successfully switched to the target cell, and the second network device is a network device corresponding to the target cell.
  • the second network device can instruct the terminal device to successfully switch to the target cell, thereby improving the switching success rate and communication efficiency.
  • the fourth information is the first scheduled new transmission of the terminal device on the target cell; or, the fourth information is preset information, and the preset information is transmitted on the physical downlink shared channel PDSCH scheduled for the first time in the target cell.
  • the method further comprises:
  • the fifth information instructing the terminal device to deactivate a third TCI state is all or part of the TCI state in the first TCI set
  • the first TCI set includes TCI states corresponding to candidate cells
  • the candidate cells are cells configured by the first network device for beam measurement for the terminal device.
  • the TCI state includes a quasi-co-located QCL source, the QCL source including at least one of the following:
  • the channel state information reference signal CSI-RS of the candidate cell is the channel state information reference signal CSI-RS of the candidate cell.
  • the first TCI set is the union of the second TCI sets of each candidate cell, and the second TCI set is the TCI set of the candidate cell itself; or, the first TCI set includes at least one TCI identifier, and one TCI identifier corresponds to a TCI state in the second TCI set.
  • the method further comprises:
  • the sixth information indicates a fifth TCI state
  • the fifth TCI state is the TCI state of the target cell itself.
  • the sixth information is used to instruct the terminal device to activate the fifth TCI state and deactivate the second TCI state.
  • the terminal device switches to the target cell based on switching without random access.
  • FIG6 is a flow chart of a beam indication method according to an embodiment of the present disclosure. As shown in FIG6, an embodiment of the present disclosure relates to a beam indication method, which can be performed by a communication system, and the method may include:
  • Step S6101 The first network device sends second information to the terminal device.
  • the terminal device may receive the second information.
  • the first network device may be a network device corresponding to a service cell of the terminal device.
  • the second information can be used to preconfigure second parameters for switching for the terminal device, and the second parameters may include at least one of the following: RRC parameters of at least one candidate cell; beam indication TCI states during switching; a first TCI set, which may also be called LTM TCI state pool.
  • the second information can be used to pre-configure RRC parameters of each candidate cell for the terminal device, and for beam indication TCI states during the switching process.
  • the first TCI set may have different forms.
  • the first TCI set is designed independently (not associated) with the TCI set (second TCI set) of each candidate cell. For example:
  • the QCL source in the first TCI set is a SSB for beam measurement.
  • the QCL in the first TCI set is a TRS
  • the information of the TRS can be independently configured
  • the QCL source of the TRS is the SSB measured by L1.
  • the information of the TRS can be included in the second information.
  • the first TCI set is associated with the TCI set (second TCI set) of each candidate cell (non-independent design), for example:
  • the first TCI set is an independent set, but the TCI state configuration in the first TCI set is exactly the same as the TCI state of the candidate cell.
  • the first TCI set may only include an identification list (ID list) of the TCI state configured under each candidate cell.
  • Step S6102 The first network device sends third information to the terminal device.
  • the terminal device may receive the third information.
  • the third information may activate one or more TCI states in the first TCI set for the terminal device.
  • the third information may activate the TCI state of one or more candidate cells for the terminal device.
  • Step S6103 The first network device sends first information to the terminal device.
  • the first information may be used to trigger user switching to a target cell and indicate a transmission beam of the target cell.
  • the first information may include at least a first identifier and a second identifier
  • the first identifier may be a cell identifier of the target cell
  • the second identifier may be a TCI state identifier
  • Step S6104 The terminal device sends the seventh information to the second network device.
  • the second network device may receive the seventh information.
  • the seventh information can be used to instruct the terminal device to access the second network device.
  • the seventh information may be the first uplink data (First UL data).
  • the terminal device may send the seventh information via the first beam.
  • Step S6105 The second network device sends fourth information to the terminal device.
  • the terminal device may receive the fourth information sent by the second network device, determine that the target cell is successfully accessed, and complete the handover.
  • the fourth information is the first scheduling of new transmission (new transmission resource PUSCH/PDSCH).
  • the fourth information is a specific message specified by the protocol and is transmitted on the PDSCH scheduled for the first time in the target cell.
  • the fourth information is a PDCCH for scheduling new transmission data (PDCCH scheduling a new transmission).
  • Step S6106 The terminal device determines the transmission beam of the target cell.
  • the terminal device may determine the transmission beam of the target cell after the handover is completed.
  • the transmission beam of the target cell may also be referred to as the first beam.
  • the terminal device may determine an activated first TCI state, and determine a transmission beam (ie, a first beam) of the target cell according to the activated first TCI state.
  • different methods can be used to determine the activated first TCI state according to different forms of the first TCI set (LTM TCI state).
  • the first TCI set is independently designed, and the source reference signal is SSB.
  • the first TCI set is designed independently (not associated) with the TCI sets (second TCI set) of each candidate cell, and the QCL source in the first TCI set is the SSB used for beam measurement.
  • all activated LTM TCI states are deactivated by default, except for the TCI state indicated by the handover signaling.
  • the beam indicated in the first information may be used.
  • the target cell may be indicated by activating a TCI state through MAC CE, or by DCI after activating multiple TCI states through MAC CE.
  • the terminal device can retain all activated LTM TCI states (that is, retain the LTM TCI states activated before the cell switching) to support subsequent LTM.
  • a zone active or signaling may be introduced to deactivate the LTM TCI state.
  • a zone active or signaling may be introduced to deactivate the LTM TCI state.
  • the target cell indicates its own TCI state, continue to use the LTM TCI state for subsequent beam indication, but it is necessary to introduce an identification distinction.
  • the first TCI set is independently designed, and the source reference signal is a TRS.
  • all activated LTM TCI states except the TCI state indicated by the handover signaling are deactivated.
  • the beam indicated in the handover signaling can be used.
  • the LTM TCI states of other candidate cells are all deactivated, but the LTM TCI states of the target cell are maintained activated.
  • the target cell may continue to utilize the LTM TCI state that is maintained activated for subsequent beam indication.
  • it may be limited to activated LTM TCI states.
  • an identifier can be introduced in the activation information/indication signaling to distinguish whether the activation/indication is the LTM TCI state or the TCI state of the target cell.
  • the terminal device can retain all activated LTM TCI states to facilitate support for subsequent LTM, and explicit deactivation signaling can be defined at this time.
  • the target cell can indicate its own TCI state, and the terminal device uses the beam indicated by the switching signaling before the indication.
  • the TCI state in the first TCI set is associated with the TCI state of the candidate cell.
  • the first TCI set may be an independent set, but the TCI state configuration in the first TCI set is exactly the same as the TCI state of the candidate cell.
  • the beam can be determined by using the source reference signal SSB of the CSI-RS in the indicated TCI state.
  • the configuration of the CSI-RS as the QCL source can also be placed outside the configuration of each candidate cell, for example, it can be placed in the second information used to configure the first TCI set.
  • the TCI state configuration in the first TCI set is exactly the same as the TCI state of the candidate cell.
  • the LTM TCI states of the target cell that remain activated after the handover is completed can be considered, and the TCI state configured by the target cell itself can be considered to be activated. These activated TCI states can be directly indicated, and the reactivated TCI states indicated in the subsequent default signaling are all the TCI states of the target cell itself.
  • all activated LTM TCI states can be retained to facilitate support for subsequent LTM, and explicit deactivation signaling can also be introduced. It can also be considered that the TCI states configured by the target cell itself are also activated, and the subsequent target cell can directly indicate these activated TCI states.
  • the first TCI set only contains an identification list (ID list) of the TCI state configured under each candidate cell.
  • the serving cell needs to process the RRC parameters of each candidate cell in advance to obtain the TCI state and CSI-RS configuration and perform beam indication.
  • the beam indications during and after switching are actually the TCI state of the target cell itself.
  • step S6106 can be executed after any step from step S6101 to step S6105.
  • Step S6107 The second network device sends sixth information to the terminal device.
  • the terminal device may receive sixth information sent by the second network device.
  • the sixth information can be used to indicate the TCI state of the target cell, which TCI state is different from the LTM TCI state, but is the TCI state under the user's own RRC parameters.
  • the sixth information is MAC CE.
  • the sixth information is DCI.
  • the first TCI set may be an LTM TCI state pool, based on which any of the following beam indication methods may be designed:
  • Method 1 The LTM TCI state pool and the TCI state pool of each candidate cell are designed independently.
  • the first method may include the following example 1 and example 2.
  • Example 1 The QCL source in the LTM TCI state is the SSB used for beam measurement. At this time, the LTM TCI state can only be used in the handover process. After the handover is completed, the TCI state of the target cell needs to be used for beam indication. Specifically,
  • the beam indicated in the handover signaling is used.
  • the indication here is when the MAC CE activates a TCI state, or when the MAC CE activates multiple TCI states and indicates through the DCI
  • deactivation signaling is introduced to deactivate the LTM TCI state, otherwise the user will need to maintain all activated LTM TCI states.
  • the beam indicated by the switching signaling is used until the target cell indicates its own TCI state.
  • Example 2 The QCL in the LTM TCI state is TRS, the information of TRS is independently configured, and the QCL source of TRS is the SSB measured by L1.
  • This TRS can be CSI-RS.
  • the transmission beam can be determined by using the same beam as the source reference signal SSB of TRS in the TCI state.
  • the switched beam indication may include multiple methods, for example:
  • all activated LTM TCI states are deactivated except the TCI state indicated by the handover signaling.
  • the beam indicated in the handover signaling is used.
  • the LTM TCI states of the activated target cell are maintained.
  • the LTM TCI state can continue to be used for subsequent beam indication.
  • it can be specified to be limited to the activated LTM TCI states. Introduce an identifier in the activation information/indication signaling to distinguish whether the activation/indication is the LTM TCI state or the TCI state of the target cell.
  • retaining all activated LTM TCI states is convenient for supporting subsequent LTM, and explicit deactivation signaling is required at this time (different from Option 1-Case 2, where TCI can be used for transmission, while Option 1-Case 2 TCI can only be used for measurement).
  • the target cell can indicate its own TCI state, and use the beam indicated by the switching signaling before the indication, or it can be allowed to continue to use the LTM TCI state for subsequent beam indication before the target cell indicates its own TCI state, but it is necessary to introduce an identifier to distinguish.
  • Method 2 The TCI state in the LTM TCI state pool is associated with the TCI state of the candidate cell.
  • the second method may include the following example three and example four.
  • Example 3 Independent pool, but the TCI state configuration in the pool is exactly the same as the TCI state of the candidate cell
  • the beam determination method may include: using the source reference signal SSB of the CSI-RS in the indicated TCI state.
  • the configuration of the CSI-RS as the QCL source can also be placed outside the configuration of each candidate cell.
  • the switched beam indication may include multiple methods, for example:
  • retaining all activated LTM TCI states is convenient for supporting subsequent LTM, and explicit deactivation signaling is also required. It can also be considered that the TCI states configured by the target cell itself are also activated, and the subsequent target cell can directly indicate these activated TCI states.
  • Example 4 The LTM TCI state pool only contains an ID list of the TCI state configured under each candidate cell.
  • the serving cell needs to process the RRC parameters of each candidate cell in advance to obtain the TCI state and CSI-RS configuration and perform beam indication.
  • the transmission beam of the target cell can be indicated to the terminal device during the switching process, so that the terminal device can successfully switch to the target cell and the target cell can provide data services.
  • a communication system which may include a terminal device, a first network device, and a second network device, wherein the terminal device can execute the beam indication method executed by the terminal device in the aforementioned embodiment of the present disclosure; the first network device can execute the beam indication method executed by the first network device in the aforementioned embodiment of the present disclosure; and the second network device can execute the beam indication method executed by the second network device in the aforementioned embodiment of the present disclosure.
  • the embodiments of the present disclosure also propose a device for implementing any of the above methods, for example, a device is proposed, the above device includes a unit or module for implementing each step performed by the terminal device in any of the above methods.
  • a device is also proposed, including a unit or module for implementing each step performed by a network device (such as an access network device, a core network function node, a core network device, etc.) in any of the above methods.
  • a network device such as an access network device, a core network function node, a core network device, etc.
  • the division of the units or modules in the above device is only a division of logical functions, which can be fully or partially integrated into one physical entity or physically separated in actual implementation.
  • the units or modules in the device can be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and instructions are stored in the memory.
  • the processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory inside the device or a memory outside the device.
  • CPU central processing unit
  • microprocessor a microprocessor
  • the units or modules in the device may be implemented in the form of hardware circuits, and the functions of some or all of the units or modules may be implemented by designing the hardware circuits.
  • the hardware circuits may be understood as one or more processors.
  • the hardware circuits are application-specific integrated circuits (ASICs), and the functions of some or all of the above units or modules may be implemented by designing the logical relationship of the components in the circuits.
  • the hardware circuits may be implemented by programmable logic devices (PLDs).
  • field programmable gate arrays may include a large number of logic gate circuits, and the connection relationship between the logic gate circuits may be configured by configuring the configuration files, thereby implementing the functions of some or all of the above units or modules. All units or modules of the above devices may be implemented in the form of software called by the processor, or in the form of hardware circuits, or in the form of software called by the processor, and the remaining part may be implemented in the form of hardware circuits.
  • the processor is a circuit with signal processing capability.
  • the processor may be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above hardware circuit may be fixed or reconfigurable, such as a hardware circuit implemented by a processor such as an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA.
  • ASIC application-specific integrated circuit
  • PLD programmable logic device
  • the process of the processor loading a configuration document to implement the hardware circuit configuration may be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules.
  • it can also be a hardware circuit designed for artificial intelligence, which can be understood as ASIC, such as Neural Network Processing Unit (NPU), Tensor Processing Unit (TPU), Deep Learning Processing Unit (DPU), etc.
  • ASIC Neural Network Processing Unit
  • NPU Neural Network Processing Unit
  • TPU Tensor Processing Unit
  • DPU Deep Learning Processing Unit
  • FIG7A is a schematic diagram of the structure of a terminal device proposed in an embodiment of the present disclosure.
  • the terminal device 101 may include: at least one of a transceiver module 7101, a processing module 7102, etc.
  • the transceiver module 7101 is configured to receive a first message sent by a first network device, the first message triggers the terminal device to perform a handover to a target cell, and the first network device is a network device corresponding to the current serving cell of the terminal device;
  • the processing module 7102 is configured to determine a first transmission configuration indication TCI state according to the first information, the first TCI state indicates a first beam, and the first beam is a beam used by the terminal device in performing a handover to the target cell; determine a second TCI state, the second TCI state indicates a second beam, and the second beam is a beam used by the terminal device after switching to the target cell, and the second TCI state is the same as or different from the first TCI state.
  • the first information includes a first identifier and/or a second identifier
  • the first identifier is a cell identifier of the target cell
  • the second identifier is used to determine the first TCI state.
  • the transceiver module 7101 is further configured to receive second information sent by the first network device, wherein the second information includes a first TCI set and a parameter of a candidate cell preconfigured by the first network device for the terminal device, wherein the first TCI set includes a TCI state corresponding to the candidate cell, and the candidate cell is a TCI state configured by the first network device for the terminal device for beam measurement. Community.
  • the transceiver module 7101 is further configured to receive third information sent by the first network device, where the third information is the TCI state corresponding to the activation of one or more candidate cells in the first TCI set by the terminal device.
  • the first TCI state is any one of the following:
  • the second TCI state is any one of the following:
  • At least one of the TCI states in the first TCI set that is activated and corresponds to the target cell is different from the first TCI state.
  • the transceiver module 7101 is further configured to receive fourth information sent by a second network device, where the second network device is a network device corresponding to the target cell, and the fourth information is used to determine that the terminal device has successfully switched to the target cell.
  • the fourth information is the first scheduled new transmission of the terminal device on the target cell; or, the fourth information is preset information, and the preset information is transmitted on the physical downlink shared channel PDSCH scheduled for the first time in the target cell.
  • the transceiver module 7101 is also configured to receive fifth information sent by the second network device, wherein the fifth information instructs the terminal device to deactivate a third TCI state, and the third TCI state is all or part of the TCI state in the first TCI set.
  • the TCI state includes a quasi-co-located QCL source, the QCL source including at least one of the following:
  • the channel state information reference signal CSI-RS of the candidate cell is the channel state information reference signal CSI-RS of the candidate cell.
  • the first TCI set is the union of the second TCI sets of each candidate cell, and the second TCI set is the TCI set of the candidate cell itself; or, the first TCI set includes at least one TCI identifier, and one TCI identifier corresponds to a TCI state in the second TCI set.
  • the processing module 7102 is further configured to determine that after the terminal device switches to the target cell, the fourth TCI state is kept activated, and the fourth TCI state includes any one of the following:
  • a TCI state in the first TCI set that is in an activated state and corresponds to the target cell
  • the TCI states in the first TCI set are in an activated state.
  • the transceiver module 7101 is further configured to receive sixth information sent by the second network device, where the sixth information indicates a fifth TCI state, and the fifth TCI state is the TCI state of the target cell itself.
  • the sixth information is used to instruct the terminal device to activate the fifth TCI state and deactivate the second TCI state.
  • the terminal device switches to the target cell based on switching without random access.
  • FIG7B is a schematic diagram of the structure of a first network device proposed in an embodiment of the present disclosure.
  • the first network device 1021 may include: at least one of a transceiver module 7201, a processing module 7202, etc.
  • the transceiver module 7201 is configured to send first information to a terminal device, the first information triggering the terminal device to perform a handover to a target cell, and the first network device is a network device corresponding to a current serving cell of the terminal device.
  • the first information includes a first identifier and/or a second identifier
  • the first identifier is a cell identifier of the target cell
  • the second identifier is used to determine a first transmission configuration indication TCI state
  • the first TCI state indicates a first beam
  • the first beam is a beam used by the terminal device after switching to the target cell.
  • the transceiver module 7201 is configured to send second information to the terminal device, the second information including parameters of a first TCI set and a candidate cell preconfigured by the first network device for the terminal device, the first TCI set including a TCI state corresponding to the candidate cell, and the candidate cell being a cell configured by the first network device for beam measurement for the terminal device.
  • the transceiver module 7201 is configured to send third information to the terminal device, where the third information is the TCI state corresponding to the activation of one or more candidate cells in the first TCI set by the terminal device.
  • the first TCI state is any one of the following
  • the terminal device determines a second beam through a second TCI state, where the second beam is a beam used by the terminal device after switching to the target cell; the second TCI state is any one of the following:
  • At least one of the TCI states in the first TCI set that is activated and corresponds to the target cell is different from the first TCI state.
  • the TCI state includes a quasi-co-located QCL source, the QCL source including at least one of the following:
  • the channel state information reference signal CSI-RS of the candidate cell is the channel state information reference signal CSI-RS of the candidate cell.
  • the first TCI set is the union of the second TCI sets of each candidate cell, and the second TCI set is the TCI set of the candidate cell itself; or, the first TCI set includes at least one TCI identifier, and one TCI identifier corresponds to a TCI state in the second TCI set.
  • the terminal device switches to the target cell based on switching without random access.
  • FIG7C is a schematic diagram of the structure of a second network device proposed in an embodiment of the present disclosure.
  • the second network device 1022 may include: at least one of a transceiver module 7301, a processing module 7302, etc.
  • the transceiver module 7301 is configured to send fourth information to the terminal device, the fourth information is used to determine that the terminal device has successfully switched to the target cell, and the second network device is the network device corresponding to the target cell.
  • the fourth information is the first scheduled new transmission of the terminal device on the target cell; or, the fourth information is preset information, and the preset information is transmitted on the physical downlink shared channel PDSCH scheduled for the first time in the target cell.
  • the transceiver module 7301 is configured to send fifth information to the terminal device, wherein the fifth information instructs the terminal device to deactivate a third TCI state, wherein the third TCI state is all or part of the TCI state in a first TCI set, wherein the first TCI set includes TCI states corresponding to candidate cells, and the candidate cells are cells configured by the first network device for beam measurement for the terminal device.
  • the TCI state includes a quasi-co-located QCL source, the QCL source including at least one of the following:
  • the channel state information reference signal CSI-RS of the candidate cell is the channel state information reference signal CSI-RS of the candidate cell.
  • the first TCI set is the union of the second TCI sets of each candidate cell, and the second TCI set is the TCI set of the candidate cell itself; or, the first TCI set includes at least one TCI identifier, and one TCI identifier corresponds to a TCI state in the second TCI set.
  • the transceiver module 7301 is configured to send sixth information to the terminal device, where the sixth information indicates a fifth TCI state, and the fifth TCI state is the TCI state of the target cell itself.
  • the sixth information is used to instruct the terminal device to activate the fifth TCI state and deactivate the second TCI state.
  • the terminal device switches to the target cell based on switching without random access.
  • the transceiver module may include a sending module and/or a receiving module, and the sending module and the receiving module may be separate or integrated.
  • the transceiver module may be interchangeable with the transceiver.
  • the processing module can be a module or include multiple submodules.
  • the multiple submodules respectively execute all or part of the steps required to be executed by the processing module.
  • the processing module can be replaced with the processor.
  • FIG8A is a schematic diagram of the structure of a communication device 8100 proposed in an embodiment of the present disclosure.
  • the communication device 8100 may be a network device (e.g., an access network device, a core network device, a first network device, a second network device, etc.), or a terminal device (e.g., a user device, etc.), or a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal device to implement any of the above methods.
  • the communication device 8100 may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.
  • the communication device 8100 includes one or more processors 8101.
  • the processor 8101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit.
  • the baseband processor may be used to process the communication protocol and the communication data
  • the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute the program, and process the data of the program.
  • the communication device 8100 may be used to execute any of the above methods.
  • one or more processors 8101 are used to call instructions so that the communication device 8100 executes any of the above methods.
  • the communication device 8100 may further include one or more transceivers 8102.
  • the transceiver 8102 may perform at least one of the communication steps such as sending and/or receiving in the above method (for example, step S2101, step S2103, step S2104, step S2105, step S2107, step S2108, step S2111, step S2112, but not limited thereto), and the processor 8101 may perform at least one of the other steps (for example, step S2102, step S2106, step S2110, but not limited thereto).
  • the transceiver may include a receiver and/or a transmitter, and the receiver and the transmitter may be separate or integrated.
  • the terms transceiver, transceiver unit, transceiver, transceiver circuit, interface circuit, interface, etc. may be replaced with each other, the terms transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.
  • the communication device 8100 further includes one or more memories 8103 for storing data.
  • the memories 8103 may also be located outside the communication device 8100.
  • the communication device 8100 may include one or more interface circuits 8104.
  • the interface circuit 8104 is connected to the memory 8103, and the interface circuit 8104 may be used to receive data from the memory 8103 or other devices, and may be used to send data to the memory 8103 or other devices.
  • the interface circuit 8104 may read the data in the memory 8103. The stored data is sent to the processor 8101.
  • the communication device 8100 described in the above embodiments may be a network device or a terminal device, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 8A.
  • the communication device may be an independent device or may be part of a larger device.
  • the communication device may be: (1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.
  • FIG. 8B is a schematic diagram of the structure of a chip 8200 provided in an embodiment of the present disclosure.
  • the communication device 8100 may be a chip or a chip system
  • the chip 8200 includes one or more processors 8201, and the chip 8200 is used to execute any of the above methods.
  • the chip 8200 further includes one or more interface circuits 8204.
  • the terms interface circuit, interface, transceiver pin, etc. can be interchangeable.
  • the chip 8200 further includes one or more memories 8203 for storing data.
  • all or part of the memories 8203 can be outside the chip 8200.
  • the interface circuit 8204 is connected to the memory 8203, and the interface circuit 8204 can be used to receive data from the memory 8203 or other devices, and the interface circuit 8204 can be used to send data to the memory 8203 or other devices.
  • the interface circuit 8204 can read the data stored in the memory 8203 and send the data to the processor 8201.
  • the interface circuit 8204 performs at least one of the communication steps such as sending and/or receiving in the above method (for example, step S2101, step S2103, step S2104, step S2105, step S2107, step S2108, step S2111, step S2112, but not limited thereto).
  • the interface circuit 8204 performs the communication steps such as sending and/or receiving in the above method, for example, means that the interface circuit 8204 performs data interaction between the processor 8201, the chip 8200, the memory 8203 or the transceiver device.
  • the processor 8201 may perform at least one of the other steps (for example, step S2102, step S2106, step S2110, but not limited thereto).
  • modules and/or devices described in the embodiments such as virtual devices, physical devices, chips, etc. can be combined or separated as needed.
  • some or all steps can also be performed by multiple modules and/or devices in collaboration, which is not limited here.
  • the embodiment of the present disclosure also proposes a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 8100, the communication device 8100 executes any of the above methods.
  • the storage medium is an electronic storage medium.
  • the storage medium is a computer-readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices.
  • the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a temporary storage medium.
  • the embodiment of the present disclosure also provides a program product, and when the program product is executed by the communication device 8100, the communication device 8100 executes any of the above methods.
  • the program product may be a computer program product.
  • the embodiment of the present disclosure also provides a computer program, which, when executed on a computer, enables the computer to execute any of the above methods.

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Abstract

本公开实施例涉及一种波束指示方法、设备和存储介质。该方法包括：接收第一网络设备发送的第一信息，该第一信息触发终端设备执行向目标小区的切换，该第一网络设备为终端设备的当前服务小区对应的网络设备；根据第一信息确定第一传输配置指示TCI状态，该第一TCI状态指示第一波束，该第一波束为终端设备在执行向目标小区的切换过程中使用的波束；确定第二TCI状态，该第二TCI状态指示第二波束，该第二波束为终端设备在切换至目标小区后使用的波束，该第二TCI状态与第一TCI状态相同或不同。这样，终端设备可以确定在切换至目标小区后使用的第二波束，以便终端设备切换至目标小区并通过目标小区进行通信，从而提高了切换成功率和通信效率。

Description

波束指示方法、设备和存储介质 技术领域
本公开涉及通信技术领域，尤其涉及一种波束指示方法、设备和存储介质。
背景技术
在无线通信系统中，为了降低切换时延，减少信令开销，第三代合作伙伴项目(3rd Generation Partnership Project，3GPP)引入了层1(Layer 1，L1)或层2(Layer 2，L2)触发的移动性(L1/L2-triggered Mobility，LTM)。基于LTM，网络设备可以为终端设备配置多个候选小区(或候选小区组)，并通过L1信令或L2信令控制终端设备进行切换。
发明内容
本公开实施例提出了一种波束指示方法、设备和存储介质。
根据本公开实施例的第一方面，提出了一种波束指示方法，所述方法包括：
接收第一网络设备发送的第一信息，所述第一信息触发终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备；
根据所述第一信息确定第一传输配置指示TCI状态，所述第一TCI状态指示第一波束，所述第一波束为所述终端设备在执行向所述目标小区的切换过程中使用的波束；
确定第二TCI状态，所述第二TCI状态指示第二波束，所述第二波束为所述终端设备在切换至所述目标小区后使用的波束，所述第二TCI状态与所述第一TCI状态相同或不同。
根据本公开实施例的第二方面，提出了一种波束指示方法，所述方法包括：
向终端设备发送第一信息，所述第一信息触发所述终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备。
根据本公开实施例的第三方面，提出了一种波束指示方法，所述方法包括：
向终端设备发送第四信息，所述第四信息用于确定所述终端设备成功切换至目标小区，所述第二网络设备为所述目标小区对应的网络设备。
根据本公开实施例的第四方面，提出了一种终端设备，包括：
收发模块，被配置为接收第一网络设备发送的第一信息，所述第一信息触发终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备；
处理模块，被配置为根据所述第一信息确定第一传输配置指示TCI状态，所述第一TCI状态指示第一波束，所述第一波束为所述终端设备在执行向所述目标小区的切换过程中使用的波束；确定第二TCI状态，所述第二TCI状态指示第二波束，所述第二波束为所述终端设备在切换至所述目标小区后使用的波束，所述第二TCI状态与所述第一TCI状态相同或不同。
根据本公开实施例的第五方面，提出了一种第一网络设备，包括：
收发模块，被配置为向终端设备发送第一信息，所述第一信息触发所述终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备。
根据本公开实施例的第六方面，提出了一种第二网络设备，包括：
收发模块，被配置为向终端设备发送第四信息，所述第四信息用于确定所述终端设备成功切换至目标小区，所述第二网络设备为所述目标小区对应的网络设备。
根据本公开实施例的第七方面，提出了一种通信设备，包括：一个或多个处理器；其中，该通信设备可以用于执行第一方面、第二方面或第三方面的可选实现方式。
根据本公开实施例的第八方面，提出了一种存储介质，该存储介质存储有指令，当该指令在通信设备上运行时，使得该通信设备执行如第一方面、第二方面或第三方面的可选实现方式所描述的方法。
根据本公开实施例的第九方面，提出了一种通信系统，该通信系统可以包括：终端设备、第一网络设备和第二网络设备；其中，该终端设备被配置为执行如第一方面的可选实现方式所描述的方法，该第一网络设备被配置为执行如第二方面的可选实现方式所描述的方法，该第二网络设备被配置为执行如第三方面的可选实现方式所描述的方法。
本公开实施例提供的技术方案可以包括以下有益效果：接收第一网络设备发送的第一信息，该第一信息触发终端设备执行向目标小区的切换，该第一网络设备为终端设备的当前服务小区对应的网络设备；根据第一信息确定第一传输配置指示TCI状态，该第一TCI状态指示第一波束，该第一波束为终端设备在执行向目标小区的切换过程中使用的波束；确定第二TCI状态，该第二TCI状态指示第二波束，该第二波束 为终端设备在切换至目标小区后使用的波束，该第二TCI状态与第一TCI状态相同或不同。这样，终端设备可以确定在切换至目标小区后使用的第二波束，以便终端设备切换至目标小区并通过目标小区进行通信，从而提高了切换成功率和通信效率。
在本公开的一些实施例中，终端设备在切换到目标小区后进行信号传输(例如数据或信令的传输)需要使用相应的波束，这样，如何确定传输波束成为亟待解决的问题。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
为了更清楚地说明本公开实施例中的技术方案，以下对实施例描述所需的附图进行介绍，以下附图仅仅是本公开的一些实施例，不对本公开的保护范围造成具体限制。
图1A是根据本公开实施例示出的一种通信系统的架构示意图。
图1B是根据本公开实施例示出的一种配置信息的示意图。
图2A是根据本公开实施例示出的一种波束指示方法的交互示意图。
图2B是根据本公开实施例示出的一种波束指示方法的交互示意图。
图2C是根据本公开实施例示出的一种波束指示方法的交互示意图。
图3A是根据本公开实施例示出的一种波束指示方法的流程示意图。
图3B是根据本公开实施例示出的一种波束指示方法的流程示意图。
图3C是根据本公开实施例示出的一种波束指示方法的流程示意图。
图4A是根据本公开实施例示出的一种波束指示方法的流程示意图。
图4B是根据本公开实施例示出的一种波束指示方法的流程示意图。
图4C是根据本公开实施例示出的一种波束指示方法的流程示意图。
图5A是根据本公开实施例示出的一种波束指示方法的流程示意图。
图5B是根据本公开实施例示出的一种波束指示方法的流程示意图。
图5C是根据本公开实施例示出的一种波束指示方法的流程示意图。
图6是根据本公开实施例示出的一种波束指示方法的流程示意图。
图7A是根据本公开实施例示出的一种终端设备的结构示意图。
图7B是根据本公开实施例示出的一种第一网络设备的结构示意图。
图7C是根据本公开实施例示出的一种第二网络设备的结构示意图。
图8A是根据本公开实施例示出的一种通信设备的结构示意图。
图8B是根据本公开实施例示出的一种芯片的结构示意图。
具体实施方式
本公开实施例提出了一种波束指示方法、设备和存储介质。
第一方面，本公开实施例提出了一种波束指示方法，所述方法包括：
接收第一网络设备发送的第一信息，所述第一信息触发终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备；
根据所述第一信息确定第一传输配置指示TCI状态，所述第一TCI状态指示第一波束，所述第一波束为所述终端设备在执行向所述目标小区的切换过程中使用的波束；
确定第二TCI状态，所述第二TCI状态指示第二波束，所述第二波束为所述终端设备在切换至所述目标小区后使用的波束，所述第二TCI状态与所述第一TCI状态相同或不同。
在上述实施例中，终端设备可以确定在切换至目标小区后使用的第二波束，以便终端设备切换至目标小区并通过目标小区进行通信，从而提高了切换成功率和通信效率。
结合第一方面的一些实施例，在一些实施例中，所述第一信息包括第一标识和/或第二标识，所述第一标识为所述目标小区的小区标识，所述第二标识用于确定所述第一TCI状态。
在上述实施例中，终端设备可以根据第一信息确定切换的目标小区和第一TCI状态，从而提高切换过程中的波束指示的灵活性。
结合第一方面的一些实施例，在一些实施例中，所述方法还包括：
接收所述第一网络设备发送的第二信息，所述第二信息包括所述第一网络设备为所述终端设备预配置的第一TCI集合和候选小区的参数，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为所述第一网络设备为所述终端设备配置的进行波束测量的小区。
在上述实施例中，通过第二信息可以预配置第一TCI集合，从而提高了切换控制的灵活性。
结合第一方面的一些实施例，在一些实施例中，所述方法还包括：
接收所述第一网络设备发送的第三信息，所述第三信息为所述终端设备激活所述第一TCI集合中的一个或多个候选小区对应的TCI状态。
在上述实施例中，通过第三信息可以激活TCI状态，从而进一步提高了切换控制的灵活性。
结合第一方面的一些实施例，在一些实施例中，所述第一TCI状态为以下任意一项：
所述第一TCI集合中与所述目标小区对应的TCI状态中的至少一个；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中的至少一个。
在上述实施例中，可以灵活确定切换过程中使用的第一TCI状态，从而可以灵活控制切换过程。
结合第一方面的一些实施例，在一些实施例中，所述第二TCI状态为以下任意一项：
所述第一TCI状态；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中不同于所述第一TCI状态的至少一个。
在上述实施例中，可以灵活确定切换后使用的第一TCI状态，从而可以灵活控制切换后的信号传输。
结合第一方面的一些实施例，在一些实施例中，所述方法还包括：
接收第二网络设备发送的第四信息，所述第二网络设备为所述目标小区对应的网络设备，所述第四信息用于确定所述终端设备成功切换至所述目标小区。
在上述实施例中，通过第四信息可以指示终端设备成功切换至目标小区，提高了切换可靠性。
结合第一方面的一些实施例，在一些实施例中，
所述第四信息为所述终端设备在所述目标小区上的第一次调度新传；或者，
所述第四信息为预设信息，所述预设信息在所述目标小区第一次调度的物理下行共享信道PDSCH上传输。
在上述实施例中，上述任意一种第四信息均可以用于指示终端设备成功切换至目标小区，从而提高了切换控制的灵活性。
结合第一方面的一些实施例，在一些实施例中，所述方法还包括：
接收第二网络设备发送的第五信息，所述第五信息指示所述终端设备去激活第三TCI状态，所述第三TCI状态为所述第一TCI集合中的全部或部分TCI状态。
在上述实施例中，通过第五信息可以去激活第三TCI状态，从而可以减少终端设备激活的TCI状态，降低终端设备的功耗。
结合第一方面的一些实施例，在一些实施例中，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
候选小区的同步信号块SSB；
所述候选小区的信道状态信息参考信号CSI-RS。
在上述实施例中，可以将SSB和/或CSI-RS作为QCL源，可以灵活进行波束指示。
结合第一方面的一些实施例，在一些实施例中，
所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，
所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
在上述实施例中，通过第一TCI集合与候选小区的第二TCI集合关联设计，灵活实现切换使用的第一TCI集合。
结合第一方面的一些实施例，在一些实施例中，所述方法还包括：
确定所述终端设备切换至所述目标小区后，保持第四TCI状态处于激活状态，所述第四TCI状态包括以下任意一项：
所述第一TCI状态；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态；
所述第一TCI集合中处于激活状态的TCI状态。
在上述实施例中，终端设备可以灵活控制保持激活状态的第四TCI状态，提高了基于TCI状态进行波束指示的灵活性。
结合第一方面的一些实施例，在一些实施例中，所述方法还包括：
接收第二网络设备发送的第六信息，所述第六信息指示第五TCI状态，所述第五TCI状态为目标小区自身的TCI状态。
在上述实施例中，终端设备可以根据第二网络设备的指示激活第五TCI状态，提高了波束指示的灵活性。
结合第一方面的一些实施例，在一些实施例中，所述第六信息用于指示终端设备激活第五TCI状态，并去激活所述第二TCI状态。
这样，目标小区可以去激活第二TCI状态并激活第五TCI状态，进一步提高了波束指示的灵活性。
结合第一方面的一些实施例，在一些实施例中，所述终端设备向所述目标小区切换的方式为基于无随机接入的切换。
在上述实施例中，可以提高终端设备基于无随机接入切换的成功率和通信效率。
第二方面，本公开实施例提出了一种波束指示方法，所述方法包括：
向终端设备发送第一信息，所述第一信息触发所述终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备。
在上述实施例中，第一网络设备可以指示终端设备确定在切换至目标小区后使用的第二波束，以便终端设备切换至目标小区并通过目标小区进行通信，从而提高了切换成功率和通信效率。
结合第二方面的一些实施例，在一些实施例中，所述第一信息包括第一标识和/或第二标识，所述第一标识为所述目标小区的小区标识，所述第二标识用于确定第一传输配置指示TCI状态，所述第一TCI状态指示第一波束，所述第一波束为所述终端设备在切换至所述目标小区后使用的波束。
结合第二方面的一些实施例，在一些实施例中，所述方法还包括：
向所述终端设备发送第二信息，所述第二信息包括所述第一网络设备为所述终端设备预配置的第一TCI集合和候选小区的参数，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为所述第一网络设备为所述终端设备配置的进行波束测量的小区。
结合第二方面的一些实施例，在一些实施例中，所述方法还包括：
向所述终端设备发送第三信息，所述第三信息为所述终端设备激活所述第一TCI集合中的一个或多个候选小区对应的TCI状态。
结合第二方面的一些实施例，在一些实施例中，所述第一TCI状态为以下任意一项：
所述第一TCI集合中与所述目标小区对应的TCI状态中的至少一个；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中的至少一个。
结合第二方面的一些实施例，在一些实施例中，所述终端设备通过第二TCI状态确定第二波束，所述第二波束为所述终端设备在切换至所述目标小区后使用的波束；所述第二TCI状态为以下任意一项：
所述第一TCI状态；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中不同于所述第一TCI状态的至少一个。
结合第二方面的一些实施例，在一些实施例中，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
候选小区的同步信号块SSB；
所述候选小区的信道状态信息参考信号CSI-RS。
结合第二方面的一些实施例，在一些实施例中，
所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，
所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
结合第二方面的一些实施例，在一些实施例中，所述终端设备向所述目标小区切换的方式为基于无随机接入的切换。
第三方面，本公开实施例提出了一种波束指示方法，所述方法包括：
向终端设备发送第四信息，所述第四信息用于确定所述终端设备成功切换至目标小区，所述第二网络设备为所述目标小区对应的网络设备。
在上述实施例中，这样，第二网络设备可以指示终端设备成功切换至目标小区，提高切换成功率和通信效率。
结合第三方面的一些实施例，在一些实施例中，
所述第四信息为所述终端设备在所述目标小区上的第一次调度新传；或者，
所述第四信息为预设信息，所述预设信息在所述目标小区第一次调度的物理下行共享信道PDSCH上传输。
结合第三方面的一些实施例，在一些实施例中，所述方法还包括：
向所述终端设备发送第五信息，所述第五信息指示所述终端设备去激活第三TCI状态，所述第三TCI状态为第一TCI集合中的全部或部分TCI状态，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为第一网络设备为所述终端设备配置的进行波束测量的小区。
结合第三方面的一些实施例，在一些实施例中，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
候选小区的同步信号块SSB；
所述候选小区的信道状态信息参考信号CSI-RS。
结合第三方面的一些实施例，在一些实施例中，
所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，
所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
结合第三方面的一些实施例，在一些实施例中，所述方法还包括：
向所述终端设备发送第六信息，所述第六信息指示第五TCI状态，所述第五TCI状态为所述目标小区自身的TCI状态。
结合第三方面的一些实施例，在一些实施例中，所述第六信息用于指示终端设备激活第五TCI状态，并去激活所述第二TCI状态。
结合第三方面的一些实施例，在一些实施例中，所述终端设备向所述目标小区切换的方式为基于无随机接入的切换。
第四方面，本公开实施例提出了一种终端设备，该终端设备可以包括收发模块、处理模块中的至少一者；其中，该终端设备可以用于执行第一方面的可选实现方式。
第五方面，本公开实施例提出了一种第一网络设备，该第一网络设备可以包括收发模块、处理模块中的至少一者；其中，该第一网络设备可以用于执行第二方面的可选实现方式。
第六方面，本公开实施例提出了一种第二网络设备，该第二网络设备可以包括收发模块、处理模块中的至少一者；其中，该第二网络设备可以用于执行第三方面的可选实现方式。
第七方面，本公开实施例提出了一种通信设备，该通信设备可以包括：一个或多个处理器；其中，该通信设备可以用于执行第一方面、第二方面或第三方面的可选实现方式。
第八方面，本公开实施例提出了一种存储介质，该存储介质存储有指令，当该指令在通信设备上运行时，使得该通信设备执行如第一方面、第二方面或第三方面的可选实现方式所描述的方法。
第九方面，本公开实施例提出了一种通信系统，该通信系统可以包括：终端设备、第一网络设备和第二网络设备；其中，该终端设备被配置为执行如第一方面的可选实现方式所描述的方法，该第一网络设备被配置为执行如第二方面的可选实现方式所描述的方法，该第二网络设备被配置为执行如第三方面的可选实现方式所描述的方法。
第十方面，本公开实施例提出了一种程序产品，该程序产品被通信设备执行时，使得该通信设备执行如第一方面、第二方面或第三方面的可选实现方式所描述的方法。
第十一方面，本公开实施例提出了计算机程序，当其在计算机上运行时，使得计算机执行如第一方面、第二方面或第三方面的可选实现方式所描述的方法。
第十二方面，本公开实施例提供了一种芯片或芯片系统。该芯片或芯片系统包括处理电路，被配置为执行如第一方面、第二方面或第三方面的可选实现方式所描述的方法。
可以理解地，上述终端设备、第一网络设备、第二网络设备、通信设备、通信系统、存储介质、程序产品、计算机程序、芯片或芯片系统均可以用于执行本公开实施例所提出的方法。因此，其所能达到的有益效果可以参考对应方法中的有益效果，此处不再赘述。
本公开实施例提出了一种波束指示方法、设备和存储介质。在一些实施例中，波束指示方法与信息处理方法、通信方法等术语可以相互替换；波束指示装置与信息处理装置、通信装置、通信设备等术语可以相互替换；信息处理系统、通信系统等术语可以相互替换。
本公开实施例并非穷举，仅为部分实施例的示意，不作为对本公开保护范围的具体限制。在不矛盾的情况下，某一实施例中的每个步骤均可以作为独立实施例来实施，且各步骤之间可以任意组合，例如，在某一实施例中去除部分步骤后的方案也可以作为独立实施例来实施，且在某一实施例中各步骤的顺序可以任意交换，另外，某一实施例中的可选实现方式可以任意组合；此外，各实施例之间可以任意组合，例如，不同实施例的部分或全部步骤可以任意组合，某一实施例可以与其他实施例的可选实现方式任意组合。
在各本公开实施例中，如果没有特殊说明以及逻辑冲突，各实施例之间的术语和/或描述具有一致性，且可以互相引用，不同实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
本公开实施例中所使用的术语只是为了描述特定实施例的目的，而并非作为对本公开的限制。
在本公开实施例中，除非另有说明，以单数形式表示的元素，如“一个”、“一种”、“该”、“上述”、“所述”、“前述”、“这一”等，可以表示“一个且只有一个”，也可以表示“一个或多个”、“至少一个”等。例如，在翻译中使用如英语中的“a”、“an”、“the”等冠词(article)的情况下，冠词之后的名词可以理解为单数表达形式，也可以理解为复数表达形式。
在一些实施例中，“多个”可以指两个或两个以上。
在一些实施例中，“至少一者(至少一项、至少一个)(at least one of)”、“一个或多个(一项或多项)(one or more)”、“多个(a plurality of)”、“多个(multiple)等术语可以相互替换。
在一些实施例中，“A、B中的至少一者”、“A和/或B”、“在一情况下A，在另一情况下B”、“响应于一情况A，响应于另一情况B”等记载方式，根据情况可以包括以下技术方案：在一些实施例中A(与B无关地执行A)；在一些实施例中B(与A无关地执行B)；在一些实施例中从A和B中选择执行(A和B被选择性执行)；在一些实施例中A和B(A和B都被执行)。当有A、B、C等更多分支时也类似上述。
在一些实施例中，“A或B”等记载方式，根据情况可以包括以下技术方案：在一些实施例中A(与B无关地执行A)；在一些实施例中B(与A无关地执行B)；在一些实施例中从A和B中选择执行(A和B被选择性执行)。当有A、B、C等更多分支时也类似上述。
本公开实施例中的“第一”、“第二”等前缀词，仅仅为了区分不同的描述对象，不对描述对象的位置、顺序、优先级、数量或内容等构成限制，对描述对象的陈述参见权利要求或实施例中上下文的描述，不应因为使用前缀词而构成多余的限制。例如，描述对象为“字段”，则“第一字段”和“第二字段”中“字段”之前的序数词并不限制“字段”之间的位置或顺序，“第一”和“第二”并不限制其修饰的“字段”是否在同一个消息中，也不限制“第一字段”和“第二字段”的先后顺序。再如，描述对象为“等级”，则“第一等级”和“第二等级”中“等级”之前的序数词并不限制“等级”之间的优先级。再如，描述对象的数量并不受序数词的限制，可以是一个或者多个，以“第一装置”为例，其中“装置”的数量可以是一个或者多个。此外，不同前缀词修饰的对象可以相同或不同，例如，描述对象为“装置”，则“第一装置”和“第二装置”可以是相同的装置或者不同的装置，其类型可以相同或不同；再如，描述对象为“信息”，则“第一信息”和“第二信息”可以是相同的信息或者不同的信息，其内容可以相同或不同。
在一些实施例中，“包括A”、“包含A”、“用于指示A”、“携带A”，可以解释为直接携带A，也可以解释为间接指示A。
在一些实施例中，“响应于……”、“响应于确定……”、“在……的情况下”、“在……时”、“当……时”、“若……”、“如果……”等术语可以相互替换。
在一些实施例中，“大于”、“大于或等于”、“不小于”、“多于”、“多于或等于”、“不少于”、“高于”、“高于或等于”、“不低于”、“以上”等术语可以相互替换，“小于”、“小于或等于”、“不大于”、“少于”、“少于或等于”、“不多于”、“低于”、“低于或等于”、“不高于”、“以下”等术语可以相互替换。
在一些实施例中，装置等可以解释为实体的、也可以解释为虚拟的，其名称不限定于实施例中所记载的名称。“装置”、“设备(equipment)”、“设备(device)”、“电路”、“网元”、“节点”、“功能”、“单元”、“部件(section)”、“系统”、“网络”、“芯片”、“芯片系统”、“实体”、“主体”等术语可以相互替换。
在一些实施例中，“网络”可以解释为网络中包含的装置(例如，网络设备、接入网设备、核心网设备等)。
在一些实施例中，网络设备可以包括接入网设备、核心网设备中的至少一项。
在一些实施例中，“接入网设备(Access Network Device，AN Device)”、“无线接入网设备(Radio Access Network Device，RAN Device)”、“基站(Base Station，BS)”、“无线基站(Radio Base Station)”、“固定台(Fixed Station)”、“节点(Node)”、“接入点(Access Point)”、“发送点(Transmission Point，TP)”、“接收点(Reception Point，RP)”、“发送和/或接收点(Transmission/Reception Point，TRP)”、“面板(Panel)”、“天线面板(Antenna Panel)”、“天线阵列(Antenna Array)”、“小区(Cell)”、“宏小区(Macro Cell)”、“小型小区(Small Cell)”、“毫微微小区(Femto Cell)”、“微微小区(Pico Cell)”、“扇区(Sector)”、“小区组(Cell Group)”、“服务小区”、“载波(Carrier)”、“分量载波(Component Carrier)”、“带宽部分(Bandwidth Part，BWP)”等术语可以相互替换。
在一些实施例中，“终端(Terminal)”、“终端设备(Terminal Device)”、“终端侧设备”、“用户设备(User Equipment，UE)”、“用户终端(User Terminal)”、“移动台(Mobile Station，MS)”、“移动终端(Mobile Terminal，MT)”、订户站(Subscriber Station)、移动单元(Mobile Unit)、订户单元(Subscriber Unit)、无线单元(Wireless Unit)、远程单元(Remote Unit)、移动设备(Mobile Device)、无线设备(Wireless Device)、无线通信设备(Wireless Communication Device)、远程设备(Remote Device)、移动订户站(Mobile Subscriber Station)、接入终端(Access Terminal)、移动终端(Mobile Terminal)、无线终端(Wireless Terminal)、远程终端(Remote Terminal)、手持设备(Handset)、用户代理(User Agent)、移动客户端(Mobile Client)、客户端(Client)等术语可以相互替换。
在一些实施例中，接入网设备、核心网设备、或网络设备可以被替换为终端设备。例如，针对将接入网设备、核心网设备、或网络设备以及终端设备间的通信置换为多个终端设备间的通信(例如，设备对设备(device-to-device，D2D)、车联网(vehicle-to-everything，V2X)等)的结构，也可以应用本公开的各实施例。在该情况下，也可以设为终端设备具有接入网设备所具有的全部或部分功能的结构。此外，“上行”、“下行”等术语也可以被替换为与终端设备间通信对应的术语(例如，“侧行(side)”)。例如，上行信道、下行信道等可以被替换为侧行信道或直连信道，上行链路、下行链路等可以被替换为侧行链路或直连链路。
在一些实施例中，终端设备可以被替换为接入网设备、核心网设备、或网络设备。在该情况下，也可以设为接入网设备、核心网设备、或网络设备具有终端设备所具有的全部或部分功能的结构。
在一些实施例中，获取数据、信息等可以遵照所在地国家的法律法规。
在一些实施例中，可以在得到用户同意后获取数据、信息等。
此外，本公开实施例的表格中的每一元素、每一行、或每一列均可以作为独立实施例来实施，任意元素、任意行、任意列的组合也可以作为独立实施例来实施。
图1A是根据本公开实施例示出的一种通信系统的架构示意图。如图1A所示，该通信系统100可以包括终端设备(Terminal Device)101、网络设备102。
在一些实施例中，终端设备101可以包括手机(mobile phone)、可穿戴设备、物联网设备、具备通信功能的汽车、智能汽车、车载终端、平板电脑(Pad)、带无线收发功能的电脑、路侧单元(RSU，Road Side Unit)、虚拟现实(Virtual Reality，VR)终端设备、增强现实(Augmented Reality，AR)终端设备、工业控制(Industrial Control)中的无线终端设备、无人驾驶(Self-Driving)中的无线终端设备、远程手术(Remote Medical Surgery)中的无线终端设备、智能电网(Smart Grid)中的无线终端设备、运输安全(Transportation Safety)中的无线终端设备、智慧城市(Smart City)中的无线终端设备、智慧家庭(Smart Home)中的无线终端设备中的至少一者，但不限于此。
在一些实施例中，网络设备102可以包括接入网设备、核心网设备中的至少一者。
在一些实施例中，接入网设备可以是将终端设备接入到无线网络的节点或设备，接入网设备可以包括5G通信系统中的演进节点B(evolved NodeB，eNB)、下一代演进节点B(next generation eNB，ng-eNB)、下一代节点B(next generation NodeB，gNB)、节点B(node B，NB)、家庭节点B(home node B，HNB)、家庭演进节点B(home evolved nodeB，HeNB)、无线回传设备、无线网络控制器(Radio Network Controller，RNC)、基站控制器(Base Station Controller，BSC)、基站收发台(Base Transceiver Station，BTS)、基带单元(Base Band Unit，BBU)、移动交换中心、6G通信系统中的基站、开放型基站(Open RAN)、云基站(Cloud RAN)、其他通信系统中的基站、Wi-Fi系统中的接入节点中的至少一者，但不限于此。
在一些实施例中，本公开的技术方案可适用于Open RAN架构，此时，本公开实施例所涉及的接入网设备间或者接入网设备内的接口可变为Open RAN的内部接口，这些内部接口之间的流程和信息交互可以通过软件或者程序实现。
在一些实施例中，接入网设备可以由集中单元(Central Unit，CU)与分布式单元(Distributed Unit，DU)组成的，其中，CU也可以称为控制单元(Control Unit)，采用CU-DU的结构可以将接入网设备的协议层拆分开，部分协议层的功能放在CU集中控制，剩下部分或全部协议层的功能分布在DU中，由CU集中控制DU，但不限于此。
在一些实施例中，核心网设备可以是一个设备，也可以是多个设备或设备群。核心网可以包括演进分组核心(Evolved Packet Core，EPC)、5G核心网络(5G Core Network，5GCN)、下一代核心(Next Generation Core，NGC)中的至少一者。
可以理解的是，本公开实施例描述的通信系统是为了更加清楚的说明本公开实施例的技术方案，并不构成对于本公开实施例提出的技术方案的限定，本领域普通技术人员可知，随着系统架构的演变和新业务场景的出现，本公开实施例提出的技术方案对于类似的技术问题同样适用。
下述本公开实施例可以应用于图1A所示的通信系统100、或部分主体，但不限于此。图1A所示的各主体是示例，通信系统可以包括图1A中的全部或部分主体，也可以包括图1A以外的其他主体，各主体数量和形态为任意，各主体可以是实体的也可以是虚拟的，各主体之间的连接关系是示例，各主体之间可以不连接也可以连接，其连接可以是任意方式，可以是直接连接也可以是间接连接，可以是有线连接也可以是无线连接。
本公开各实施例可以应用于长期演进(Long Term Evolution，LTE)、LTE-Advanced(LTE-A)、LTE-Beyond(LTE-B)、SUPER 3G、IMT-Advanced、第四代移动通信系统(4th generation mobile communication system，4G)、第五代移动通信系统(5th generation mobile communication system，5G)、5G新空口(new radio，NR)、未来无线接入(Future Radio Access，FRA)、新无线接入技术(New-Radio Access Technology，RAT)、新无线(New Radio，NR)、新无线接入(New Radio Access，NX)、未来一代无线接入(Future generation radio access，FX)、Global System for Mobile communications(GSM(注册商标))、CDMA2000、超移动宽带(Ultra Mobile Broadband，UMB)、IEEE 802.11(Wi-Fi(注册商标))、IEEE 802.16(WiMAX(注册商标))、IEEE 802.20、超宽带(Ultra-WideBand，UWB)、蓝牙(Bluetooth(注册商标))、陆上公用移动通信网(Public Land Mobile Network，PLMN)网络、设备到设备(Device-to-Device，D2D)系统、机器到机器(Machine to Machine，M2M)系统、物联网(Internet of Things，IoT)系统、车联网(Vehicle-to-Everything，V2X)、利用其他通信方法的系统、基于它们而扩展的下一代系统等。此外，也可以将多个系统组合(例如，LTE或者LTE-A与5G的组合等)应用。
在本公开的一些实施例中，如图1A所示，上述网络设备102可以包括第一网络设备1021和第二网络设备1022。
在一些实施例中，终端设备可以在第一网络设备1021和第二网络设备1022之间进行小区切换，示例地，第一网络设备1021可以是终端设备的当前服务小区对应的网络设备，该服务小区也可以称为切换的源小区(Source Cell)，也就是终端设备切换前进行信号传输的小区，第二网络设备1022可以是终端设备的目标小区(Target Cell)对应的网络设备，也就是终端设备切换后进行信号传输的小区。基于移动性管理，终端设备可以从第一网络设备1021的源小区切换至第二网络设备1022的目标小区。
在一些实施例中，第一网络设备1021和第二网络设备1022可以是不同的接入网设备(例如基站)，源小区和目标小区可以是分别属于不同接入网设备(例如基站)的小区。这样，终端设备可以进行站间小区间的切换。
在另一些实施例中，第一网络设备1021和第二网络设备1022可以是同一个接入网设备(例如基站)下的两个小区，一个是源小区，一个是目标小区。这样，终端设备可以进行站内小区间的切换。
在一些实施例中，上述通信系统可以支持LTM(L1/L2-triggered Mobility，层1或层2触发的移动性)。基于LTM，网络设备可以为终端设备配置一个或多个候选小区(或候选小区组)，网络设备可以通过L1信令或L2信令控制终端设备切换至目标小区，该目标小区可以是服务小区根据波束测量结果从一个或多个候选小区(或候选小区组)中选择的小区(或小区组)。
示例地，终端设备可以根据网络设备的L1信令或L2信令，执行切换，例如，将服务小区(或小区组)从“源小区”变更为目标小区，该目标小区为服务小区根据根据波束测量结果从一个或多个候选小区(或候选小区组)中选择的小区(或小区组)。
在一些实施例中，上述L1信令可以包括下行控制信息(Downlink Control Information，DCI)。
在一些实施例中，上述L2信令可以包括媒体接入控制控制单元(Medium Access Control Control Element，MAC CE)。
可选地，上述小区也可以是发送和/或接收点(Transmission/Reception Point，TRP)，上述小区组也可以是TRP组。
在一些实施例中，基于LTM，终端设备可以对一个或多个候选小区进行信号测量，例如，可以基于参考信号进行信号测量。可选地，该参考信号可以是同步信号块(Synchronization Signal Block，SSB)、信道状态信息参考信号(Channel State Information Reference Signal，CSI-RS)或其他参考信号。可选地，“同步信号块(Synchronization Signal Block，SSB)”、“同步信号和下行广播信道模块(Synchronization Signal And Physical Downlink Broadcast Channel Block)”等术语可以相互替换。
在一些实施例中，该信号测量可以是用于LTM(层1或层2触发的移动性)的测量。
可选地，该信号测量的名称不做限定，例如可以是“波束测量”、“L1测量”、“基于LTM的测量”、“同频测量”、“邻区测量”、“同频邻区测量”、“同频L1测量”、“L1-RSRP测量”、“L1-SINR测量”、“L1-RSRQ测量”、“同频L1-RSRP测量”、“同频L1-SINR测量”、“同频L1-RSRQ测量”等。
在一些实施例中，通过上述信号测量，终端设备可以获取以下测量结果中的至少一项：
物理层参考信号接收功率(Layer 1Reference Signal Receiving Power，L1-RSRP)；
物理层信号干扰噪声比(Layer 1Signal to Interference plus Noise Ratio，L1-SINR)；
物理层参考信号接收质量(Layer 1Reference Signal Receiving Quality，L1-RSRQ)。
在本公开的一些实施例中，终端设备可以基于无随机接入(RACH-less)的切换方式进行小区切换。例如，终端设备可以基于RACH-less LTM实现从源小区到目标小区的切换。在RACH-less LTM流程中，源小区可以基于小区切换控制(cell switch command)向终端设备指示目标小区的波束，终端设备通过该波束，可以基于配置授权(Configured Grant，CG)资源向目标小区发送“第一上行数据”，该“第一上行数据”可以是确认消息或接入消息，用于通知或告知目标小区终端设备将切换至该目标小区。目标小区接收到该第一上行数据后，可以通过PDCCH(Physical Downlink Control Channel，物理下行控制信道)向终端设备发送有调度信息的DCI，终端设备接收到该调度信息后，或者接收到该DCI调度的资源中传输的预定义的信息，可以确定本次切换完成。
可选地，上述CG资源可以是预先配置的CG PUSCH(Physical Uplink Shared Channel，物理上行共享信道)。
在一些实施例中，波束也可以称为beam、准共址(Quasi co-location，QCL)Type D、空间设置(spatial setting)、空间滤波器(spatial filter)、空间关系信息(spatial relation info)、空间接收参数(spatial RX parameters)、空间发送参数(spatial Tx parameter)、传输配置指示状态(Transmission Configuration Indication state，简称TCI状态)等，本公开实施例对此不作限定。
在一些实施例中，波束可以根据TCI状态(TCI state)确定，该TCI状态可以包括准共址QCL源(QCL source)和QCL类型(QCL Type)。不同的QCL type所包含的信道参数不同，具有QCL关系的两个参考 信号具有相同的信道参数(QCL type中所包含的信道参数)。其中，该信道参数可以包括多普勒频偏(Doppler Shift)、多普勒扩展(Doppler Spread)、平均延时(Average Delay)、延时扩展(Delay Spread)、空间接收参数(Spatial Rx parameter)等参数中的一项或多项。
在一些实施例中，上述QCL type可以是以下任意一种：
QCL Type A，该QCL Type A所包含的信道参数为多普勒频偏、多普勒扩展、平均延时和延时扩展；
QCL Type B：该QCL Type B所包含的信道参数为多普勒频偏和多普勒扩展；
QCL Type C：该QCL Type C所包含的信道参数为平均延时和多普勒频偏；
QCL Type D：该QCL Type D所包含的信道参数为空间接收参数。
可选地，上述QCL Type D可以用于指示波束信息，即空间接收参数。在假设波束对应(beam correspondence)的情况下，终端设备的空间发送参数和空间接收参数是相同的。
在本公开的一些实施例中，源小区可以为终端设备指示目标小区的波束，以便于终端设备通过该波束接入目标小区。对于切换过程的波束指示，可以通过预配置，为终端设备提前配置候选小区的一个或多个TCI状态。
在一种实现方式中，源小区可以在发送小区切换控制之前，激活预配置的部分或全部TCI状态，在通过小区切换控制(cell switch command)指示触发切换的同时指示目标小区的TCI状态，该TCI状态指示目标小区的波束(传输波束)。
在另一种实现方式中，源小区也可以不提前激活TCI状态，直接在小区切换控制(cell switch command)指示触发切换的同时指示激活一个TCI状态，该TCI状态可以用于确定终端设备和目标小区的传输波束。
图1B是根据本公开实施例示出的一种配置信息的示意图。如图1B所示，网络设备可以向终端设备发送配置信息，该配置信息可以包括服务小区配置和切换配置。
在一些实施例中，服务小区配置可以包括第三TCI集合，该第三TCI集合可以包括服务小区自身的一个或多个TCI状态。
在一些实施例中，该切换配置也可以称为LTM配置，该切换配置可以包括第一TCI集合和至少一个候选小区的参数。
在一种实现方式中，该第一TCI集合可以称为LTM TCI state pool。
在一种实现方式中，候选小区的参数可以包括第二TCI集合，该第二TCI集合中可以包括候选小区自身的一个或多个TCI状态。如图1B所示，候选小区-1对应第二TCI集合-1，候选小区-2对应第二TCI集合-2。
在一些实施例中，上述配置信息可以称为RRC预配置。可选地，该RRC预配置可以是RRC重配置(RRCReconfiguration)或其他配置信息。
在本公开的一些实施例中，终端设备在切换到目标小区后进行信号传输(例如数据或信令的传输)需要使用相应的波束，这样，如何确定传输波束成为亟待解决的问题。
图2A是根据本公开实施例示出的一种波束指示方法的交互示意图。该方法可以由上述通信系统执行。如图2A所示，该方法可以包括：
步骤S2101、第一网络设备向终端设备发送第二信息。
在一些实施例中，终端设备可以接收第二信息。例如，终端设备可以接收第一网络设备发送的第二信息。
在一些实施例中，该第一网络设备为终端设备的服务小区对应的网络设备。
在一些实施例中，该第二信息可以包括第一网络设备为终端设备预配置的第一TCI集合和候选小区的参数，该第一TCI集合可以包括候选小区对应的TCI状态，该候选小区由第一网络设备为终端设备配置。
在一些实施例中，该第二信息可以用于为终端设备配置第一TCI集合。
在一些实施例中，该第二信息可以用于为终端设备配置一个或多个候选小区的参数(例如RRC参数)。
在一些实施例中，该第二信息可以用于为终端设备配置小区切换(例如LTM切换)相关的配置信息。
在一些实施例中，该第二信息的名称不做限定，例如可以是“配置信息”、“预配置信息”、“切换预配置信息”、“LTM预配置信息”、“TCI预配置信息”、“RRC预配置信息”等。
在一些实施例中，该第一TCI集合可以包括用于波束测量的一个或多个TCI状态。
在一些实施例中，该第一TCI集合可以包括候选小区对应的TCI状态，该候选小区可以是第一网络设备为终端设备配置的进行波束测量的小区。
可选地，一个候选小区可以对应一个或多个TCI状态，该第一TCI集合可以包括N个候选小区，各个候选小区分别对应各自的至少一个TCI状态，总共M个TCI状态，M和N均为正整数，M可以大于或等于N。
在一些实施例中，该第一TCI集合的名称不做限定，例如可以是“LTM TCI状态池(LTM TCI state pool)”、“LTM TCI状态列表(LTM TCI state list)”、“用于信号测量的TCI状态集合”、、“用于LTM的TCI状态集 合”、“用于LTM的TCI状态列表”、“切换过程中波束指示TCI states”等。
在一些实施例中，该第一TCI集合中的TCI状态可以包括准共址QCL源，该QCL源可以包括以下至少一项：
候选小区的同步信号块SSB；
候选小区的信道状态信息参考信号CSI-RS。
在一种实现方式中，该CSI-RS可以是追踪参考信号(Tracking Reference Signal，TRS)。该TRS的信息可以独立配置，该TRS的QCL源可以是L1测量的SSB。
在一些实施例中，该第一TCI集合可以与第二TCI集合相互独立。其中，一个第二TCI集合为一个候选小区自身的TCI集合。
示例地，该第一TCI集合各个候选小区的TCI状态可以和各个候选小区自身的TCI状态配置相同。
在一些实施例中，该第一TCI集合可以与候选小区自身的TCI状态相关联。示例地：
在一种实现方式中，该第一TCI集合中各个候选小区对应的TCI state可以是对应候选小区自身的第二TCI集合的部分或全部。
示例地，该第一TCI集中的TCI状态配置参数可以和候选小区的TCI状态配置参数相同，例如，第一TCI集合中各个候选小区对应的TCI state可以是各个候选小区的第二TCI集合的部分或全部。
可选地，该第一TCI集合可以是与候选小区的TCI状态相同但单独配置的集合。例如，该第一TCI集合可以是第二信息中的单独的信息域，候选小区的TCI状态也是单独的信息域，该第一TCI集合的信息域中的内容与候选小区的TCI状态相同。
在另一种实现方式中，该第一TCI集合可以包括至少一个TCI标识，一个TCI标识对应一个候选小区的第二TCI集合中的一个TCI状态。
示例地，该第一TCI集合可以只包含各个候选小区的一个标识列表，对应于各个候选小区下配置的TCI状态。
可选地，第一网络设备可以提前获取并处理各个候选小区的RRC参数，以获得TCI状态以及CSI-RS的配置，进而进行波束指示。
可选地，可以不存在实际的第一TCI集合(LTM TCI state)，切换中和切换后的波束实际可以由目标小区本身的TCI状态确定。
这样，通过将第一TCI集合与候选小区TCI集合相关联，可以确定TCI状态。
在一些实施例中，第一网络设备可以发送第二消息，该第二消息可以包括上述第二信息。例如，第一网络设备可以向终端设备发送第二消息。可选地，终端设备可以接收该第二消息。
该第二消息可以包括无线资源控制RRC(Radio Resource Control)消息、媒体接入控制控制单元MAC CE(Medium Access Control Control Element)、下行控制信息DCI(Downlink Control Information)或第一网络设备发送至终端设备的其他消息中的至少一项。
在一种实现方式中，该第二消息为RRC消息。
在一些实施例中，该步骤S2101可以省略，终端设备可以自主实现该第二信息所指示的功能，或上述功能为缺省或默认。例如，终端设备可以自主获取上述第一TCI集合，或基于其他消息获取上述第一TCI集合。
步骤S2102、终端设备执行信号测量。
在一些实施例中，终端设备可以根据预配置的测量参考信号对候选小区进行波束测量。
在一些实施例中，该波束测量可以是用于小区切换的测量。
在一些实施例中，该波束测量可以是用于LTM的测量。
可选地，该信号测量的名称不做限定，例如可以是“波束测量”、“L1测量”、“基于LTM的测量”、“L1-RSRP测量”等。
步骤S2103、终端设备向第一网络设备发送第一测量报告。
在一些实施例中，第一网络设备可以接收第一测量报告。例如，第一网络设备可以接收终端设备发送的第一测量报告。
在一些实施例中，该第一测量报告可以用于向第一网络设备上报各个候选小区或者候选小区和服务小区的波束测量结果。
在一些实施例中，该第一测量报告的名称不做限定，例如可以是“LTM测量报告”、“测量结果信息”等。
在一些实施例中，终端设备可以发送第一报告消息，该第一报告消息可以包括上述第一测量报告。例如，终端设备可以向第一网络设备发送第一报告消息。可选地，第一网络设备可以接收该第一报告消息。
步骤S2104、第一网络设备向终端设备发送第三信息。
在一些实施例中，终端设备可以接收第三信息。例如，终端设备可以接收第一网络设备发送的第三信 息。
在一些实施例中，该第三信息可以为终端设备激活第一TCI集合中的一个或多个候选小区对应的TCI状态。
在一些实施例中，该第三信息可以为终端设备激活第一TCI集合中的至少一个TCI状态。
在一些实施例中，该第三信息可以用于指示终端设备激活第一TCI集合中的至少一个TCI状态。
在一些实施例中，该第三信息可以用于指示终端设备激活用于信号测量的至少一个TCI状态。
在一些实施例中，该第三信息的名称不做限定，例如可以是“TCI状态激活信息”、“用于激活TCI状态的信息”、“激活信息”等。
在一些实施例中，第一网络设备可以根据第一测量报告确定要激活的至少一个TCI状态，并发送该第三信息，通过该第三信息激活TCI状态。例如，根据第一测量报告选择最有可能发生切换的候选小区，或者，信号强度最强的候选小区，将选择的候选小区下的一个或多个TCI状态作为要激活的TCI状态。
在另一些实施例中，第一网络设备可以自主确定要激活的至少一个TCI状态，并发送该第三信息。
在一些实施例中，第一网络设备可以发送第三消息，该第三消息可以包括上述第三信息。例如，第一网络设备可以向终端设备发送第三消息。可选地，终端设备可以接收该第三消息。
该第三消息可以包括RRC消息、MAC CE、DCI或第一网络设备发送至终端设备的其他消息中的至少一项。
在一种实现方式中，该第三消息为MAC CE或DCI。
在一些实施例中，该步骤S2104可以省略，
步骤S2105、第一网络设备向终端设备发送第一信息。
在一些实施例中，终端设备可以接收第一信息。例如，终端设备可以接收第一网络设备发送的第一信息。
在一些实施例中，该第一信息可以触发终端设备切换至目标小区或者执行向目标小区的切换。
在一些实施例中，该第一信息的名称不做限定，例如可以是“小区切换命令(Cell switch command)”、“切换指示”、“切换命令”等。
在一些实施例中，该终端设备向目标小区切换的方式可以是基于无随机接入(RACH-less)的切换。
在一些实施例中，该第一信息可以包括第一标识和/或第二标识，其中：该第一标识可以是目标小区的小区标识，该第二标识可以用于确定第一TCI状态。
在一些实施例中，该第一TCI状态可以指示第一波束，该第一波束可以是终端设备在执行向目标小区的切换过程中使用的波束。
在一些实施例中，该第一TCI状态可以是第一TCI集合中的TCI状态，示例地：
在一种实现方式中，该第一TCI状态可以是第一TCI集合中与目标小区对应的TCI状态中的至少一个。
在另一种实现方式中，该第一TCI状态可以是第一TCI集合中处于激活状态并且与目标小区对应的TCI状态中的至少一个。
在一些实施例中，该第一TCI状态可以是目标小区对应的TCI状态。
在一些实施例中，第一网络设备可以确定目标小区，将目标小区对应的TCI状态中的至少一个作为该第一TCI状态。例如，第一网络设备可以根据波束测量确定目标小区和目标小区的第一TCI状态，例如，可以将信号强度最强的候选小区作为切换的目标小区。再例如，第一网络设备可以其他判定准则确定目标小区。
在一些实施例中，第一网络设备可以发送第一消息，该第一消息可以包括上述第一信息。例如，第一网络设备可以向终端设备发送第一消息。可选地，终端设备可以接收该第一消息。可选地，该第一消息中还可以包含上述第三信息。
该第一消息可以包括RRC消息、MAC CE、DCI或第一网络设备发送至终端设备的其他消息中的至少一项。
在一种实现方式中，该第一消息为MAC CE或DCI。
步骤S2106、终端设备确定第一TCI状态。
在一些实施例中，终端设备可以根据第一信息确定第一TCI状态。
在一些实施例中，终端设备可以响应于接收到第一信息，确定第一TCI状态。
在一些实施例中，终端设备可以根据第一消息中的第二标识，确定该第一TCI状态。
在一些实施例中，终端设备可以根据该第一TCI状态确定第一波束，在执行向目标小区切换的过程中使用该第一波束进行信号传输。例如，终端设备可以使用该第一波束向目标小区发送信号，或接收目标小区的信号。
步骤S2107、终端设备向第二网络设备发送第七信息。
在一些实施例中，第二网络设备可以接收第七信息。例如，第二网络设备可以接收终端设备发送的第 七信息。
在一些实施例中，第二网络设备可以是目标小区对应的网络设备。
在一些实施例中，该第七信息可以用于指示终端设备接入第二网络设备。
在一些实施例中，该第七信息可以是接入消息或确认消息。
在一些实施例中，该第七信息的名称不做限定，例如可以是“接入消息”、“确认消息”、“切换指示”、“接入指示”、“第一上行数据”、“First UL data”等。
在一些实施例中，终端设备可以通过上述第一波束发送该第七信息。同样地，第二网络设备也可以通过上述第一波束接收该第七信息。
步骤S2108、第二网络设备向终端设备发送第四信息。
在一些实施例中，终端设备可以接收第四信息。例如，终端设备可以接收第二网络设备发送的第四信息。
在一些实施例中，该第四信息可以用于指示终端设备发送的第七信息被目标小区成功接收。
在一些实施例中，该第四信息可以用于确定终端设备成功切换至目标小区。
在一些实施例中，该第四信息可以用于指示终端设备成功切换至目标小区。
在一些实施例中，该第四信息的名称不做限定，例如可以是“切换完成信息”、“切换成功信息”、“首次PDCCH调度”等。
在一些实施例中，第二网络设备可以通过上述第一波束发送该第四信息。同样地，终端设备也可以通过上述第一波束接收该第四信息。
在一些实施例中，该第四信息可以是终端设备在目标小区上接收到的第一次调度资源的DCI。例如，该第四信息调度的资源可以是PUSCH或PDSCH资源。
在另一些实施例中，该第四信息调度的为PDSCH，且传输预设信息。示例地，该第四信息可以是协议规定的预设信息，在目标小区发送的第四信息调度的PDSCH上传输。
步骤S2109、第二网络设备向终端设备发送第八信息。
在一些实施例中，终端设备可以接收第八信息。例如，终端设备可以接收第二网络设备发送的第八信息。
在一些实施例中，该第八信息可以用于指示第六TCI状态。
在一些实施例中，第八信息承载于上述第四信息调度的PDSCH上传输。
在一些实施例中，终端设备可以根据该第八信息确定第六TCI状态，并保持第六TCI状态处于激活状态。
在一些实施例中，该步骤S2109为可选步骤，终端设备可以响应于接收到第四信息，自主确定该第六TCI状态。
在一些实施例中，该第六TCI状态可以是第四TCI状态中的至少一个，该第四TCI状态可以是终端设备在切换后保持处于激活状态的TCI状态。
在一些实施例中，在确定终端设备切换至目标小区后(例如接收到第四信息)，可以保持第四TCI状态处于激活状态。其中，该第四TCI状态可以包括以下任意一项：
第一TCI状态；
第一TCI集合中处于激活状态并且与目标小区对应的TCI状态；
第一TCI集合中处于激活状态的TCI状态。在一种可选的实现方式中，该第四TCI状态可以是第一TCI状态。
示例地，在切换完成后，激活的TCI状态(LTM TCI state)中除了第一信息(切换信令)指示的第一TCI状态的其他TCI状态全部去激活。可选地，在目标小区指示自身配置下的TCI状态之前，终端设备可以使用第一TCI状态指示的第一波束。
在另一种可选的实现方式中，该第四TCI状态可以是第一TCI集合中处于激活状态并且与目标小区对应的TCI状态。
示例地，在切换完成后，终端设备可以将其他候选小区的激活了的TCI状态全部去激活，但维持激活的目标小区的TCI状态。
可选地，可以在上述、第二信息或第三信息中包含标识信息，通过该标识信息确定第一TCI集合中的TCI状态分别为对应为哪个候选小区或者激活的TCI state对应于哪个候选cell或者指示的TCI state对应于哪个候选小区。
可选地，在目标小区指示自身配置下的TCI状态之前，目标小区可以指示第四TCI state中的TCI state用于更新传输波束。
在另外一种可选的实现方式中，该第四TCI状态可以是第一TCI集合中处于激活状态的TCI状态。
示例地，在切换完成后，终端设备可以保留第一TCI集合中全部激活的TCI状态，以便于支持后续的 LTM。
可选地，在目标小区指示自身配置下的TCI状态之前，目标小区可以指示第四TCI状态中与目标小区对应的TCI状态用于更新传输波束。
可选地，可以定义显式的去激活信令，例如，第二网络设备可以通过第五信息去激活TCI状态。
在一些实施例中，目标小区(第二网络设备)可以指示自身的TCI状态，例如，第二网络设备通过第六信息向终端设备指示自身的TCI状态。
在本公开的一些实施例中，对应第一TCI集合的不同设计方式，可以确定不同的第四TCI状态。示例地：
在第一种可选的实现方式中，第一TCI集合可以独立设计(与候选小区的第二TCI集合不关联)，并且QCL源为SSB。
在该方式下，在确定终端设备切换至目标小区后，可以保持第四TCI状态处于激活状态。其中，该第四TCI状态是第一TCI状态。
在第二种可选的实现方式中，第一TCI集合可以独立设计(与候选小区的第二TCI集合不关联)，并且QCL源为CSI-RS(例如TRS)。
在该方式下，在确定终端设备切换至目标小区后，可以保持第四TCI状态处于激活状态。其中，该第四TCI状态是以下任意一项：第一TCI状态；第一TCI集合中处于激活状态并且与目标小区对应的TCI状态；第一TCI集合中处于激活状态的TCI状态。
在第三种可选的实现方式中，第一TCI集合可以与候选小区的第二TCI集合相关联，并且第一TCI集合可以是至少一个第二TCI集合的并集，一个第二TCI集合为一个候选小区自身的TCI集合。
在该方式下，在确定终端设备切换至目标小区后，可以保持第四TCI状态处于激活状态。其中，该第四TCI状态是以下任意一项：第一TCI集合中处于激活状态并且与目标小区对应的TCI状态；第一TCI集合中处于激活状态的TCI状态。
在第四种可选的实现方式中，第一TCI集合可以与候选小区的第二TCI集合相关联，并且第一TCI集合可以包括至少一个TCI标识，一个TCI标识对应第二TCI集合中的一个TCI状态。
在该方式下，在确定终端设备切换至目标小区后，可以保持第四TCI状态处于激活状态。其中，该第四TCI状态是以下任意一项：第一TCI集合中处于激活状态并且与目标小区对应的TCI状态；第一TCI集合中处于激活状态的TCI状态。
步骤S2110、终端设备确定第二TCI状态。
在一些实施例中，该第二TCI状态可以指示第二波束，该第二波束可以是终端设备在切换至目标小区后使用的波束。示例地，终端设备可以在向目标小区切换成功后，通过该第二波束向目标小区发送数据和/或信令。
在一些实施例中，该第二TCI状态与上述第一TCI状态可以相同或不同。
在一些实施例中，该第二TCI状态可以是上述第一TCI状态。
在另一些实施例中，该第二TCI状态可以是上述第六TCI状态，也就是由第八信息指示的TCI状态。例如，该第二TCI状态可以是第一TCI集合中处于激活状态并且与目标小区对应的TCI状态中不同于第一TCI状态的至少一个。
在另外一些实施例中，该第二TCI状态可以是第一TCI集合中处于激活状态并且与目标小区对应的TCI状态中的至少一个，例如除了上述第一TCI状态和第六TCI状态外的其他TCI状态。
步骤S2111、第二网络设备向终端设备发送第五信息。
在一些实施例中，终端设备可以接收第五信息。例如，终端设备可以接收第二网络设备发送的第五信息。
在一些实施例中，该第五信息可以用于指示终端设备去激活TCI状态。
在一些实施例中，该第五信息可以用于指示所述终端设备去激活第三TCI状态。
在一种实现方式中，该第三TCI状态可以是第一TCI集合中的全部或部分TCI状态。
在另一种实现方式中，该第三TCI状态可以是第一TCI集合中的处于激活状态的TCI状态的子集或全集。
在另外一种实现方式中，该第三TCI状态可以是当前处于激活状态、并且网络设备判断不需要继续保持激活(例如当前无数据传输使用的TCI状态)的TCI状态。
在又一种实现方式中，该第三TCI状态不包括第二TCI状态。
在又一种实现方式中，该第三TCI状态可以是第一TCI集合中处于激活状态的TCI状态中除了上述第二TCI状态外的其他TCI状态。
在一些实施例中，该第五信息的名称不做限定，例如可以是“去激活信息”、“去激活信令”、“TCI状态去激活信令”等。
这样，通过第五信息可以去激活相应的TCI状态，避免终端设备维持过多TCI状态的激活，降低终端设备的功耗，提升终端设备的性能。
在一些实施例中，第二网络设备可以发送第五消息，该第五消息可以包括上述第五信息。例如，第二网络设备可以向终端设备发送第五消息。可选地，终端设备可以接收该第五消息。
该第五消息可以包括RRC消息、MAC CE、DCI或第二网络设备发送至终端设备的其他消息中的至少一项。
在一些实施例中，该第五信息可以是MAC CE或DCI。
在一些实施例中，该步骤S2111可以省略，终端设备可以自主实现该第五信息所指示的功能，或上述功能为缺省或默认。例如，终端设备可以自主去激活第三TCI状态。
步骤S2112、第二网络设备向终端设备发送第六信息。
在一些实施例中，终端设备可以接收第六信息。例如，终端设备可以接收第二网络设备发送的第六信息。
在一些实施例中，该第六信息可以指示第五TCI状态，该第五TCI状态可以是目标小区自身的TCI状态。
在一些实施例中，该第六信息可以用于为终端设备激活一个该第五TCI状态。
在一些实施例中，该第六信息可以用于为终端设备指示一个该第五TCI状态。
在一些实施例中，该第六信息的名称不做限定，例如可以是“TCI状态配置信息”、“TCI状态激活信息”、“TCI状态指示信息”等。
在一些实施例中，终端设备接收到该第六信息后，可以去激活第二TCI状态，激活第五TCI状态。
在一些实施例中，终端设备接收到该第六信息后，可以将除第五TCI状态外的其他TCI状态全部去激活。
在一些实施例中，第二网络设备可以发送第六消息，该第六消息可以包括上述第六信息。例如，第二网络设备可以向终端设备发送第六消息。可选地，终端设备可以接收该第六消息。
该第六消息可以包括RRC消息、MAC CE、DCI或第二网络设备发送至终端设备的其他消息中的至少一项。
在一些实施例中，该步骤S2112可以省略。例如，终端设备可以一直使用上述第二TCI状态。
本公开实施例所涉及的方法可以包括上述步骤S2101～步骤S2112中的至少一者。例如，步骤S2105可以作为独立实施例来实施，步骤S2110可以作为独立实施例来实施，步骤S2105+S2106+S2110可以作为独立实施例来实施，步骤S2101+S2104+S2105+S2106+S2108+S2110可以作为独立实施例来实施，步骤S2101+S2104+S2105+S2106+S2107+S2108+S2110可以作为独立实施例来实施，步骤S2101+S2104+S2105+S2106+S2107+S2108+S2109+S2110可以作为独立实施例来实施，步骤S2101+S2104+S2105+S2106+S2107+S2108+S2110+S2112可以作为独立实施例来实施，步骤S2101+S2104+S2105+S2106+S2107+S2108+S2110+S2111+S2112可以作为独立实施例来实施，步骤S2105+S2106+S2107+S2108+S2110可以作为独立实施例来实施，步骤S2105+S2106+S2107+S2108+S2110+S2112可以作为独立实施例来实施，步骤S2105+S2106+S2107+S2108+S2110+S2111可以作为独立实施例来实施，步骤S2105+S2106+S2107+S2108+S2110+S2111+S2112可以作为独立实施例来实施，但不限于此。
在一些实施例中，上述步骤S2101～步骤S2112均可以交换顺序或同时执行。
在一些实施例中，上述步骤S2101～步骤S2112均为可选步骤。
在一些实施例中，可参见图2A所对应的说明书之前或之后记载的其他可选实现方式。
这样，终端设备可以在切换过程中使用第一波束切换至目标小区，在切换至目标小区后使用第二波束进行信号传输，并在切换后根据目标小区的指示去激活或激活TCI状态，从而提供了灵活的波束指示和控制方法，能够提高切换成功率和通信效率。
图2B是根据本公开实施例示出的一种波束指示方法的交互示意图。如图2B所示，本公开实施例涉及波束指示方法，该方法可以由通信系统执行，该方法可以包括：
步骤S2201、第一网络设备向终端设备发送第二信息。
该步骤S2201的可选实现方式可以参见图2A的步骤S2101的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S2202、第一网络设备向终端设备发送第三信息。
该步骤S2202的可选实现方式可以参见图2A的步骤S2104的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S2203、第一网络设备向终端设备发送第一信息。
该步骤S2203的可选实现方式可以参见图2A的步骤S2105的可选实现方式、及图2A所涉及的实施 例中其他关联部分，此处不再赘述。
步骤S2204、终端设备确定第一TCI状态。
该步骤S2204的可选实现方式可以参见图2A的步骤S2106的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S2205、终端设备向第二网络设备发送第七信息。
该步骤S2205的可选实现方式可以参见图2A的步骤S2107的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S2206、第二网络设备向终端设备发送第四信息。
该步骤S2206的可选实现方式可以参见图2A的步骤S2108的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S2208、终端设备确定第二TCI状态。
该步骤S2208的可选实现方式可以参见图2A的步骤S2110的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S2208、第二网络设备向终端设备发送第六信息。
该步骤S2208的可选实现方式可以参见图2A的步骤S2112的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，上述步骤S2201～步骤S2208均可以交换顺序或同时执行。
在一些实施例中，上述步骤S2201～步骤S2208均为可选步骤。
在一些实施例中，图2B所示实施例还可以与图2A所示实施例中的任意一个或多个步骤组合作为一个新的实施例。
这样，终端设备可以在切换过程中使用第一波束切换至目标小区，在切换至目标小区后使用第二波束进行信号传输，并在切换后根据目标小区的指示激活目标小区的TCI状态，从而提高了切换成功率和通信效率。
图2C是根据本公开实施例示出的一种波束指示方法的交互示意图。如图2C所示，本公开实施例涉及波束指示方法，该方法可以由通信系统执行，该方法可以包括：
步骤S2301、第一网络设备向终端设备发送第一信息。
该步骤S2301的可选实现方式可以参见图2A的步骤S2105的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S2302、终端设备确定第一TCI状态。
该步骤S2302的可选实现方式可以参见图2A的步骤S2106的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S2303、终端设备确定第二TCI状态。
该步骤S2303的可选实现方式可以参见图2A的步骤S2110的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，上述步骤S2301～步骤S2303均可以交换顺序或同时执行。
在一些实施例中，上述步骤S2301～步骤S2303均为可选步骤。
在一些实施例中，图2C所示实施例还可以与图2A所示实施例中的任意一个或多个步骤组合作为一个新的实施例。
这样，终端设备可以确定在切换至目标小区后使用的第二波束，以便终端设备切换至目标小区并通过目标小区进行通信，从而提高了切换成功率和通信效率。
图3A是根据本公开实施例示出的一种波束指示方法的流程示意图。如图3A所示，本公开实施例涉及波束指示方法，该方法可以由终端设备执行。该方法可以包括：
步骤S3101、获取第二信息。
该步骤S3101的可选实现方式可以参见图2A的步骤S2101的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，终端设备可以接收由第一网络设备发送的第二信息，但不限于此，终端设备也可以接收由其他主体发送的第二信息。
在一些实施例中，终端设备可以获取由协议规定的第二信息。
在一些实施例中，终端设备可以从高层(upper layer(s))获取第二信息。
在一些实施例中，终端设备可以进行处理从而得到第二信息。
在一些实施例中，步骤S3101可以被省略，终端设备可以自主实现第二信息所指示的功能，或上述功能为缺省或默认。
步骤S3102、执行信号测量。
该步骤S3102的可选实现方式可以参见图2A的步骤S2102的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S3103、发送第一测量报告。
该步骤S3103的可选实现方式可以参见图2A的步骤S2103的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，终端设备可以向第一网络设备发送该第一测量报告，但不限于此，终端设备也可以向其他主体发送该第一测量报告。
步骤S3104、获取第三信息。
该步骤S3104的可选实现方式可以参见图2A的步骤S2104的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，终端设备可以接收由第一网络设备发送的第三信息，但不限于此，终端设备也可以接收由其他主体发送的第三信息。
在一些实施例中，终端设备可以获取由协议规定的第三信息。
在一些实施例中，终端设备可以从高层(upper layer(s))获取第三信息。
在一些实施例中，终端设备可以进行处理从而得到第三信息。
在一些实施例中，步骤S3104可以被省略，终端设备可以自主实现第三信息所指示的功能，或上述功能为缺省或默认。
步骤S3105、获取第一信息。
该步骤S3105的可选实现方式可以参见图2A的步骤S2105的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，终端设备可以接收由第一网络设备发送的第一信息，但不限于此，终端设备也可以接收由其他主体发送的第一信息。
在一些实施例中，终端设备可以获取由协议规定的第一信息。
在一些实施例中，终端设备可以从高层(upper layer(s))获取第一信息。
在一些实施例中，终端设备可以进行处理从而得到第一信息。
在一些实施例中，步骤S3105可以被省略，终端设备可以自主实现第一信息所指示的功能，或上述功能为缺省或默认。
步骤S3106、确定第一TCI状态。
该步骤S3106的可选实现方式可以参见图2A的步骤S2106的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S3107、发送第七信息。
该步骤S3107的可选实现方式可以参见图2A的步骤S2107的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，终端设备可以向第二网络设备发送该第七信息，但不限于此，终端设备也可以向其他主体发送该第七信息。
步骤S3108、获取第四信息。
该步骤S3108的可选实现方式可以参见图2A的步骤S2108的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，终端设备可以接收由第二网络设备发送的第四信息，但不限于此，终端设备也可以接收由其他主体发送的第四信息。
在一些实施例中，终端设备可以获取由协议规定的第四信息。
在一些实施例中，终端设备可以从高层(upper layer(s))获取第四信息。
在一些实施例中，终端设备可以进行处理从而得到第四信息。
在一些实施例中，步骤S3108可以被省略，终端设备可以自主实现第四信息所指示的功能，或上述功能为缺省或默认。
步骤S3110、确定第二TCI状态。
该步骤S3110的可选实现方式可以参见图2A的步骤S2110的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S3111、获取第五信息。
该步骤S3111的可选实现方式可以参见图2A的步骤S2111的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，终端设备可以接收由第二网络设备发送的第五信息，但不限于此，终端设备也可以接收由其他主体发送的第五信息。
在一些实施例中，终端设备可以获取由协议规定的第五信息。
在一些实施例中，终端设备可以从高层(upper layer(s))获取第五信息。
在一些实施例中，终端设备可以进行处理从而得到第五信息。
在一些实施例中，步骤S3111可以被省略，终端设备可以自主实现第五信息所指示的功能，或上述功能为缺省或默认。
步骤S3112、获取第六信息。
该步骤S3112的可选实现方式可以参见图2A的步骤S2112的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，终端设备可以接收由第二网络设备发送的第六信息，但不限于此，终端设备也可以接收由其他主体发送的第六信息。
在一些实施例中，终端设备可以获取由协议规定的第六信息。
在一些实施例中，终端设备可以从高层(upper layer(s))获取第六信息。
在一些实施例中，终端设备可以进行处理从而得到第六信息。
在一些实施例中，步骤S3112可以被省略，终端设备可以自主实现第六信息所指示的功能，或上述功能为缺省或默认。
本公开实施例所涉及的方法可以包括上述步骤S3101～步骤S3112中的至少一者。例如，步骤S3105可以作为独立实施例来实施，步骤S3110可以作为独立实施例来实施，步骤S3105+S3106+S3110可以作为独立实施例来实施，步骤S3101+S3104+S3105+S3106+S3108+S3110可以作为独立实施例来实施，步骤S3101+S3104+S3105+S3106+S3107+S3108+S3110可以作为独立实施例来实施，步骤S3101+S3104+S3105+S3106+S3107+S3108+S3109+S3110可以作为独立实施例来实施，步骤S3101+S3104+S3105+S3106+S3107+S3108+S3110+S3112可以作为独立实施例来实施，步骤S3101+S3104+S3105+S3106+S3107+S3108+S3110+S3111+S3112可以作为独立实施例来实施，步骤S3105+S3106+S3107+S3108+S3110可以作为独立实施例来实施，步骤S3105+S3106+S3107+S3108+S3110+S3112可以作为独立实施例来实施，步骤S3105+S3106+S3107+S3108+S3110+S3111可以作为独立实施例来实施，步骤S3105+S3106+S3107+S3108+S3110+S3111+S3112可以作为独立实施例来实施，但不限于此。
在一些实施例中，上述步骤S3101～步骤S3112均可以交换顺序或同时执行。
在一些实施例中，上述步骤S3101～步骤S3112均为可选步骤。
这样，终端设备可以在切换过程中使用第一波束切换至目标小区，在切换至目标小区后使用第二波束进行信号传输，并在切换后根据目标小区的指示去激活或激活TCI状态，从而提供了灵活的波束指示和控制方法，能够提高切换成功率和通信效率。
图3B是根据本公开实施例示出的一种波束指示方法的流程示意图。如图3B所示，本公开实施例涉及波束指示方法，该方法可以由终端设备执行。该方法可以包括：
步骤S3201、获取第二信息。
该步骤S3201的可选实现方式可以参见图2A的步骤S2101、图3A的步骤S3101的可选实现方式、以及图2A、图3A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S3202、获取第三信息。
该步骤S3202的可选实现方式可以参见图2A的步骤S2104、图3A的步骤S3104的可选实现方式、以及图2A、图3A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S3203、获取第一信息。
该步骤S3203的可选实现方式可以参见图2A的步骤S2105、图3A的步骤S3105的可选实现方式、以及图2A、图3A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S3204、确定第一TCI状态。
该步骤S3204的可选实现方式可以参见图2A的步骤S2106、图3A的步骤S3106的可选实现方式、以及图2A、图3A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S3205、发送第七信息。
该步骤S3205的可选实现方式可以参见图2A的步骤S2107、图3A的步骤S3107的可选实现方式、以及图2A、图3A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S3206、获取第四信息。
该步骤S3206的可选实现方式可以参见图2A的步骤S2108、图3A的步骤S3108的可选实现方式、以及图2A、图3A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S3207、确定第二TCI状态。
该步骤S3207的可选实现方式可以参见图2A的步骤S2110、图3A的步骤S3110的可选实现方式、以 及图2A、图3A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S3208、获取第六信息。
该步骤S3208的可选实现方式可以参见图2A的步骤S2112、图3A的步骤S3112的可选实现方式、以及图2A、图3A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，上述步骤均为可选步骤。
在一些实施例中，上述步骤均可以交换顺序或同时执行。
在一些实施例中，图3B所示实施例还可以与图3A所示实施例中的任意一个或多个步骤组合作为一个新的实施例。
这样，终端设备可以在切换过程中使用第一波束切换至目标小区，在切换至目标小区后使用第二波束进行信号传输，并在切换后根据目标小区的指示激活目标小区的TCI状态，从而提高了切换成功率和通信效率。
图3C是根据本公开实施例示出的一种波束指示方法的流程示意图。如图3C所示，本公开实施例涉及波束指示方法，该方法可以由终端设备执行。该方法可以包括：
步骤S3301、获取第一信息。
该步骤S3301的可选实现方式可以参见图2A的步骤S2105、图3A的步骤S3105的可选实现方式、以及图2A、图3A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，所述第一信息触发终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备。
步骤S3302、确定第一TCI状态。
该步骤S3302的可选实现方式可以参见图2A的步骤S2106、图3A的步骤S3106的可选实现方式、以及图2A、图3A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，所述第一TCI状态指示第一波束，所述第一波束为所述终端设备在执行向所述目标小区的切换过程中使用的波束。
步骤S3303、确定第二TCI状态。
该步骤S3303的可选实现方式可以参见图2A的步骤S2110、图3A的步骤S3110的可选实现方式、以及图2A、图3A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，所述第二TCI状态指示第二波束，所述第二波束为所述终端设备在切换至所述目标小区后使用的波束，所述第二TCI状态与所述第一TCI状态相同或不同。
在一些实施例中，上述步骤均为可选步骤。
在一些实施例中，上述步骤均可以交换顺序或同时执行。
在一些实施例中，图3C所示实施例还可以与图3A所示实施例中的任意一个或多个步骤组合作为一个新的实施例。
这样，终端设备可以确定在切换至目标小区后使用的第二波束，以便终端设备切换至目标小区并通过目标小区进行通信，从而提高了切换成功率和通信效率。
在一些实施例中，所述第一信息包括第一标识和/或第二标识，所述第一标识为所述目标小区的小区标识，所述第二标识用于确定所述第一TCI状态。
在一些实施例中，所述方法还包括：
接收所述第一网络设备发送的第二信息，所述第二信息包括所述第一网络设备为所述终端设备预配置的第一TCI集合和候选小区的参数，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为所述第一网络设备为所述终端设备配置的进行波束测量的小区。
在一些实施例中，所述方法还包括：
接收所述第一网络设备发送的第三信息，所述第三信息为所述终端设备激活所述第一TCI集合中的一个或多个候选小区对应的TCI状态。
在一些实施例中，所述第一TCI状态为以下任意一项：
所述第一TCI集合中与所述目标小区对应的TCI状态中的至少一个；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中的至少一个。
在一些实施例中，所述第二TCI状态为以下任意一项：
所述第一TCI状态；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中不同于所述第一TCI状态的至少一个。
在一些实施例中，所述方法还包括：
接收第二网络设备发送的第四信息，所述第二网络设备为所述目标小区对应的网络设备，所述第四信息用于确定所述终端设备成功切换至所述目标小区。
在一些实施例中，所述第四信息为所述终端设备在所述目标小区上的第一次调度新传；或者，所述第四信息为预设信息，所述预设信息在所述目标小区第一次调度的物理下行共享信道PDSCH上传输。
在一些实施例中，所述方法还包括：
接收第二网络设备发送的第五信息，所述第五信息指示所述终端设备去激活第三TCI状态，所述第三TCI状态为所述第一TCI集合中的全部或部分TCI状态。
在一些实施例中，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
候选小区的同步信号块SSB；
所述候选小区的信道状态信息参考信号CSI-RS。
在一些实施例中，所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
在一些实施例中，所述方法还包括：
确定所述终端设备切换至所述目标小区后，保持第四TCI状态处于激活状态，所述第四TCI状态包括以下任意一项：
所述第一TCI状态；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态；
所述第一TCI集合中处于激活状态的TCI状态。
在一些实施例中，所述方法还包括：
接收第二网络设备发送的第六信息，所述第六信息指示第五TCI状态，所述第五TCI状态为目标小区自身的TCI状态。
在一些实施例中，所述第六信息用于指示终端设备激活第五TCI状态，并去激活所述第二TCI状态。
在一些实施例中，所述终端设备向所述目标小区切换的方式为基于无随机接入的切换。
图4A是根据本公开实施例示出的一种波束指示方法的流程示意图。如图4A所示，本公开实施例涉及波束指示方法，该方法可以由第一网络设备执行，上述方法包括：
步骤S4101、发送第二信息。
该步骤S4101的可选实现方式可以参见图2A的步骤S2101的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，第一网络设备可以向终端设备发送该第二信息，但不限于此，第一网络设备也可以向其他主体发送该第二信息。
步骤S4102、获取第一测量报告。
该步骤S4102的可选实现方式可以参见图2A的步骤S2103的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S4103、发送第三信息。
该步骤S4103的可选实现方式可以参见图2A的步骤S2104的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，第一网络设备可以向终端设备发送该第三信息，但不限于此，第一网络设备也可以向其他主体发送该第三信息。
步骤S4104、发送第一信息。
该步骤S4104的可选实现方式可以参见图2A的步骤S2105的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，第一网络设备可以向终端设备发送该第一信息，但不限于此，第一网络设备也可以向其他主体发送该第一信息。
本公开实施例所涉及的方法可以包括上述步骤S4101～步骤S4104中的至少一者。例如，步骤S4104可以作为独立实施例来实施，步骤S4101可以作为独立实施例来实施，步骤S4103可以作为独立实施例来实施，步骤S4103+S4104可以作为独立实施例来实施，步骤S4101+S4104可以作为独立实施例来实施，步骤S4101+S4103+S4104可以作为独立实施例来实施，步骤S4101+S4102+S4103+S4104可以作为独立实施例来实施，但不限于此。
在一些实施例中，上述步骤S4101～步骤S4104均可以交换顺序或同时执行。
在一些实施例中，上述步骤S4101～步骤S4104均为可选步骤。
这样，第一网络设备可以指示终端设备在切换过程中使用第一波束，在切换至目标小区后使用第二波束进行信号传输，从而提供了灵活的波束指示和控制方法，能够提高切换成功率和通信效率。
图4B是根据本公开实施例示出的一种波束指示方法的流程示意图。如图4B所示，本公开实施例涉及波束指示方法，该方法可以由第一网络设备执行。该方法可以包括：
步骤S4201、发送第二信息。
该步骤S4201的可选实现方式可以参见图2A的步骤S2101、图4A的步骤S4101的可选实现方式、以及图2A、图4A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S4202、发送第三信息。
该步骤S4202的可选实现方式可以参见图2A的步骤S2103、图4A的步骤S4103的可选实现方式、以及图2A、图4A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S4203、发送第一信息。
该步骤S4203的可选实现方式可以参见图2A的步骤S2105、图4A的步骤S4104的可选实现方式、以及图2A、图4A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，上述步骤均为可选步骤。
在一些实施例中，上述步骤均可以交换顺序或同时执行。
在一些实施例中，图4B所示实施例还可以与图4A所示实施例中的任意一个或多个步骤组合作为一个新的实施例。
这样，第一网络设备可以指示终端设备在切换过程中使用第一波束，在切换至目标小区后使用第二波束进行信号传输，从而提供了灵活的波束指示和控制方法，能够提高切换成功率和通信效率。
图4C是根据本公开实施例示出的一种波束指示方法的流程示意图。如图4C所示，本公开实施例涉及波束指示方法，该方法可以由第一网络设备执行。该方法可以包括：
步骤S4301、发送第一信息。
该步骤S4301的可选实现方式可以参见图2A的步骤S2105、图4A的步骤S4104的可选实现方式、以及图2A、图4A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，图4C所示实施例还可以与图4A所示实施例中的任意一个或多个步骤组合作为一个新的实施例。
在一些实施例中，所述第一信息触发所述终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备。
这样，第一网络设备可以指示终端设备确定在切换至目标小区后使用的第二波束，以便终端设备切换至目标小区并通过目标小区进行通信，从而提高了切换成功率和通信效率。
在一些实施例中，所述第一信息包括第一标识和/或第二标识，所述第一标识为所述目标小区的小区标识，所述第二标识用于确定第一传输配置指示TCI状态，所述第一TCI状态指示第一波束，所述第一波束为所述终端设备在切换至所述目标小区后使用的波束。
在一些实施例中，所述方法还包括：
向所述终端设备发送第二信息，所述第二信息包括所述第一网络设备为所述终端设备预配置的第一TCI集合和候选小区的参数，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为所述第一网络设备为所述终端设备配置的进行波束测量的小区。
在一些实施例中，所述方法还包括：
向所述终端设备发送第三信息，所述第三信息为所述终端设备激活所述第一TCI集合中的一个或多个候选小区对应的TCI状态。
在一些实施例中，所述第一TCI状态为以下任意一项：
所述第一TCI集合中与所述目标小区对应的TCI状态中的至少一个；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中的至少一个。
在一些实施例中，所述终端设备通过第二TCI状态确定第二波束，所述第二波束为所述终端设备在切换至所述目标小区后使用的波束；所述第二TCI状态为以下任意一项：
所述第一TCI状态；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中不同于所述第一TCI状态的至少一个。
在一些实施例中，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
候选小区的同步信号块SSB；
所述候选小区的信道状态信息参考信号CSI-RS。
在一些实施例中，所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
在一些实施例中，所述终端设备向所述目标小区切换的方式为基于无随机接入的切换。
图5A是根据本公开实施例示出的一种波束指示方法的流程示意图。如图5A所示，本公开实施例涉及波束指示方法，该方法可以由第二网络设备执行，上述方法包括：
步骤S5101、获取第七信息。
该步骤S5101的可选实现方式可以参见图2A的步骤S2107的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S5102、发送第四信息。
该步骤S5102的可选实现方式可以参见图2A的步骤S2108的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，第二网络设备可以向终端设备发送该第四信息，但不限于此，第二网络设备也可以向其他主体发送该第四信息。
步骤S5103、发送第八信息。
该步骤S5103的可选实现方式可以参见图2A的步骤S2109的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，第二网络设备可以向终端设备发送该第八信息，但不限于此，第二网络设备也可以向其他主体发送该第八信息。
步骤S5104、发送第五信息。
该步骤S5104的可选实现方式可以参见图2A的步骤S2111的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，第二网络设备可以向终端设备发送该第五信息，但不限于此，第二网络设备也可以向其他主体发送该第五信息。
步骤S5105、发送第六信息。
该步骤S5105的可选实现方式可以参见图2A的步骤S2112的可选实现方式、及图2A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，第二网络设备可以向终端设备发送该第六信息，但不限于此，第二网络设备也可以向其他主体发送该第六信息。
本公开实施例所涉及的方法可以包括上述步骤S5101～步骤S5105中的至少一者。例如，步骤S5102可以作为独立实施例来实施，步骤S5104可以作为独立实施例来实施，步骤S5105可以作为独立实施例来实施，步骤S5101+S5102可以作为独立实施例来实施，步骤S5102+S5105可以作为独立实施例来实施，步骤S5101+S5102+S5104可以作为独立实施例来实施，步骤S5101+S5102+S5105可以作为独立实施例来实施，但不限于此。
在一些实施例中，上述步骤S5101～步骤S5105均可以交换顺序或同时执行。
在一些实施例中，上述步骤S5101～步骤S5105均为可选步骤。
这样，第二网络设备可以指示终端设备成功切换至目标小区，并通过第二波束为终端设备提供信号传输，并在切换后指示终端设备去激活或激活TCI状态，从而提供了灵活的波束指示和控制方法，能够提高切换成功率和通信效率。
图5B是根据本公开实施例示出的一种波束指示方法的流程示意图。如图5B所示，本公开实施例涉及波束指示方法，该方法可以由第二网络设备执行。该方法可以包括：
步骤S5201、获取第七信息。
该步骤S5201的可选实现方式可以参见图2A的步骤S2107、图5A的步骤S5101的可选实现方式、以及图2A、图5A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S5202、发送第四信息。
该步骤S5202的可选实现方式可以参见图2A的步骤S2108、图5A的步骤S5102的可选实现方式、以及图2A、图5A所涉及的实施例中其他关联部分，此处不再赘述。
步骤S5203、发送第六信息。
该步骤S5203的可选实现方式可以参见图2A的步骤S2112、图5A的步骤S5105的可选实现方式、以及图2A、图5A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，上述步骤均为可选步骤。
在一些实施例中，上述步骤均可以交换顺序或同时执行。
在一些实施例中，图5B所示实施例还可以与图5A所示实施例中的任意一个或多个步骤组合作为一个新的实施例。
这样，第二网络设备可以指示终端设备成功切换至目标小区，并通过第二波束为终端设备提供信号传输，并在切换后指示终端设备激活TCI状态，从而提供了灵活的波束指示和控制方法，能够提高切换成功率和通信效率。
图5C是根据本公开实施例示出的一种波束指示方法的流程示意图。如图5C所示，本公开实施例涉及波束指示方法，该方法可以由第二网络设备执行。该方法可以包括：
步骤S5301、发送第四信息。
该步骤S5301的可选实现方式可以参见图2A的步骤S2108、图5A的步骤S5102的可选实现方式、以及图2A、图5A所涉及的实施例中其他关联部分，此处不再赘述。
在一些实施例中，图5C所示实施例还可以与图5A所示实施例中的任意一个或多个步骤组合作为一个新的实施例。
在一些实施例中，所述第四信息用于确定所述终端设备成功切换至目标小区，所述第二网络设备为所述目标小区对应的网络设备。
这样，第二网络设备可以指示终端设备成功切换至目标小区，提高切换成功率和通信效率。
在一些实施例中，所述第四信息为所述终端设备在所述目标小区上的第一次调度新传；或者，所述第四信息为预设信息，所述预设信息在所述目标小区第一次调度的物理下行共享信道PDSCH上传输。
在一些实施例中，所述方法还包括：
向所述终端设备发送第五信息，所述第五信息指示所述终端设备去激活第三TCI状态，所述第三TCI状态为第一TCI集合中的全部或部分TCI状态，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为第一网络设备为所述终端设备配置的进行波束测量的小区。
在一些实施例中，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
候选小区的同步信号块SSB；
所述候选小区的信道状态信息参考信号CSI-RS。
在一些实施例中，所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
在一些实施例中，所述方法还包括：
向所述终端设备发送第六信息，所述第六信息指示第五TCI状态，所述第五TCI状态为所述目标小区自身的TCI状态。
在一些实施例中，所述第六信息用于指示终端设备激活第五TCI状态，并去激活所述第二TCI状态。
在一些实施例中，所述终端设备向所述目标小区切换的方式为基于无随机接入的切换。
图6是根据本公开实施例示出的一种波束指示方法的流程示意图。如图6所示，本公开实施例涉及波束指示方法，该方法可以由通信系统执行，该方法可以包括：
步骤S6101、第一网络设备向终端设备发送第二信息。
在一些实施例中，终端设备可以接收该第二信息。
在一些实施例中，该第一网络设备可以是终端设备的服务小区对应的网络设备。
在一些实施例中，该第二信息可以用于为终端设备预配置用于切换的第二参数，该第二参数可以包括以下至少一项：至少一个候选小区的RRC参数；切换过程中波束指示TCI states；第一TCI集合，该第一TCI集合也可以称为LTM TCI state pool。
在一些实施例中，该第二信息可以用于为终端设备预配置各个候选小区的RRC参数，以及用于切换过程中波束指示TCI states。
在本公开的一些实施例中，该第一TCI集合可以有不同的形式。
在一些实施例中，该第一TCI集合与各个候选小区的TCI集合(第二TCI集合)独立设计(不关联)，示例地：
在一种实现方式中，该第一TCI集合中的QCL源(source)为用于进行波束测量的SSB。
在另一种实现方式中，该第一TCI集合中的QCL为TRS，TRS的信息可以独立配置，TRS的QCL source为L1测量的SSB。可选地，该TRS的信息可以在该第二信息中包含。
在另一些实施例中，该第一TCI集合与各个候选小区的TCI集合(第二TCI集合)相关联(非独立设计)，示例地：
在一种实现方式中，该第一TCI集合为独立的集合，但第一TCI集合中的TCI state配置和候选小区的TCI state完全一样。
在另一种实现方式中，该第一TCI集合中可以只包含各个候选小区下配置的TCI state的一个标识列表(ID list)。
步骤S6102、第一网络设备向终端设备发送第三信息。
在一些实施例中，终端设备可以接收该第三信息。
在一些实施例中，该第三信息可以为终端设备激活第一TCI集合中的一个或多个TCI state。
在一些实施例中，该第三信息可以为终端设备激活一个或多个候选小区的TCI state。
步骤S6103、第一网络设备向终端设备发送第一信息。
在一些实施例中，该第一信息可以用于触发用户切换至目标小区，并指示目标小区的传输波束。
在一些实施例中，该第一信息中至少可以包括第一标识和第二标识，该第一标识可以是目标小区的小区标识，该第二标识可以是TCI状态标识。
步骤S6104、终端设备向第二网络设备发送第七信息。
在一些实施例中，第二网络设备可以接收该第七信息。
在一些实施例中，该第七信息可以用于指示终端设备接入第二网络设备。
在一些实施例中，该第七信息可以是第一上行数据(First UL data)。
在一些实施例中，终端设备可以通过第一波束发送该第七信息。
步骤S6105、第二网络设备向终端设备发送第四信息。
在一些实施例中，终端设备可以接收第二网络设备发送的第四信息，确定成功接入目标小区，完成切换。
在一些实施例中，该第四信息为第一次调度新传(新的传输资源PUSCH/PDSCH)。
在一些实施例中，该第四信息为协议规定的特定消息，在目标小区第一次调度的PDSCH上传输。
在一些实施例中，该第四信息为用于调度新传数据的PDCCH(PDCCH scheduling a new transmission)。
步骤S6106、终端设备确定目标小区的传输波束。
在一些实施例中，终端设备可以在切换完成后，确定目标小区的传输波束。可选地，该目标小区的传输波束也可以称为第一波束。
在一些实施例中，终端设备可以确定激活的第一TCI状态，根据激活的第一TCI状态确定目标小区的传输波束(也就是第一波束)。
在一些实施例中，根据第一TCI集合(LTM TCI state)的不同形式，可以使用不同的方式确定激活的第一TCI状态。
在一些实施例中，第一TCI集合独立设计，且源参考信号为SSB。
例如，该第一TCI集合与各个候选小区的TCI集合(第二TCI集合)独立设计(不关联)，并且该第一TCI集合中的QCL源(source)为用于进行波束测量的SSB。
在一种可选的实现方式中，在切换完成后，默认所有激活的LTM TCI states，除了切换信令指示的那个TCI state，全部去激活。在目标小区指示自身配置下的TCI state前，可以一直采用第一信息中指示的波束。
其中，目标小区指示的方式可以是通过MAC CE激活一个TCI state，或者，在通过MAC CE激活多个TCI state后通过DCI指示。
在另外一种可选的实现方式中，终端设备可以保留全部激活的LTM TCI state(也就是保留小区切换前激活的LTM TCI state)，以便于支持后续的LTM，
可选地，可以引入区积极或信令，用于去激活LTM TCI state。这样，可以避免终端设备一直需要维护所有激活的LTM TCI state，通过去激活部分或全部LTM TCI state，可以降低终端设备的功耗。
可选地，在目标小区指示自身的TCI state前，继续利用LTM TCI state进行后续的波束指示，但需要引入标识区分。
在另一些实施例中，第一TCI集合独立设计，且源参考信号为TRS。
在一种可选的实现方式中，在切换完成后，激活的LTM TCI states中除了切换信令指示的TCI state全部去激活。在目标小区指示自身配置下的TCI state前，可以一直采用切换信令中指示的波束。
在另一种可选的实现方式中，其他候选小区的LTM TCI states全部去激活，但维持激活的目标小区的LTM TCI states。
可选地，在目标小区激活自身的TCI state前，可以继续利用维持激活的LTM TCI state进行后续的波束指示。可选地，可以仅限于激活了的LTM TCI states。
可选地，在激活信息/指示信令中可以引入标识，通过该标识区分激活/指示的为LTM TCI state还是目标小区的TCI state。
在另外一种可选的实现方式中，终端设备可以保留全部激活的LTM TCI state，便于支持后续的LTM，这时可以定义显式的去激活信令。
可选地，目标小区可以指示自身的TCI state，在指示前终端设备使用切换信令指示的波束。
可选地，可以允许在目标小区指示自身的TCI state前，继续利用LTM TCI state进行后续的波束指示，但需要引入标识区分。
在另外一些实施例中，第一TCI集合中的TCI state和候选小区的TCI state相关联，第一TCI集合可以是独立的集合，但第一TCI集合中的TCI state配置和候选小区的TCI state完全一样。
可选地，波束的确定方式，可以采用指示的TCI state中的CSI-RS的源参考信号SSB。可选地，为了避免服务小区要去处理各个候选小区的CSI-RS配置信息，可以把作为QCL source的csi-rs的配置也放到各个候选小区的配置外，例如，可以放到用于配置第一TCI集合的第二信息中。
在一种可选的实现方式中，第一TCI集合中的TCI state配置和候选小区的TCI state完全一样，可以考虑切换完成后保持激活的目标小区的LTM TCI states，且可以认为目标小区自身配置下的TCI state也激活了。可以直接指示这些激活的TCI state，且后续默认信令中指示的重新激活的都为目标小区自身的TCI state
在另一种可选的实现方式中，可以保留全部激活的LTM TCI state，便于支持后续的LTM，同样可以引入显式的去激活信令。同样可以认为目标小区自身配置下的TCI state也激活了，后续目标小区可以直接指示这些激活的TCI state
在又一些实施例中，第一TCI集合只包含各个候选小区下配置的TCI state的一个标识列表(ID list)。
服务小区要去提前处理各个候选小区的RRC参数，以获得TCI state以及CSI-RS的配置，进入进行波束指示。
可选地，可以不存在实际的LTM TCI state，切换中和切换后的波束指示实际都是目标小区本身的TCI state。
需要说明的是，该步骤S6106可以在步骤S6101至步骤S6105的任意一个步骤之后执行。
步骤S6107、第二网络设备向终端设备发送第六信息。
在一些实施例中，终端设备可以接收第二网络设备发送的第六信息。
在一些实施例中，该第六信息可以用于指示目标小区的TCI state，该TCI state不同于LTM TCI state，而是用户自身RRC参数下的TCI state。
在一些实施例中，该第六信息为为MAC CE。
在另一些实施例中，该第六信息为DCI。
在本公开的一些实施例中，上述第一TCI集合可以是LTM TCI state pool，基于该LTM TCI state pool可以设计如下的任意一种波束指示方式：
方式一、LTM TCI state pool和各个候选小区的TCI state pool独立设计。
该方式一可以包括如下的示例一和示例二。
示例一、LTM TCI state中的QCL source为用于进行波束测量的SSB。这时，LTM TCI state只能用于切换过程。切换完成后，需要利用目标小区的TCI state进行波束指示，具体地
可选地，切换完成后，默认所有激活的LTM TCI states，除了切换信令指示的那个TCI state，全部去激活。
在目标小区指示自身配置下的TCI state前，一直采用切换信令中指示的波束。这里的指示为MAC CE激活一个TCI state时，或MAC CE激活多个后通过DCI指示
可选地，小区切换(Cell switch)前激活的LTM TCI states全部保留，用于支持后续的LTM。
这时，引入去激活信令用于去激活LTM TCI state，不然会出现用户需要维护所有激活的LTM TCI state
在目标小区指示自身的TCI state前一直采用切换信令指示的波束。
示例二、LTM TCI state中的QCL为TRS，TRS的信息独立配置，TRS的QCL source为L1测量的SSB。该TRS可以是CSI-RS。
传输波束的确定，可以采用和TCI state中TRS的源参考信号SSB相同的波束
切换后的波束指示可以包括多种方式，示例地：
例如，切换完成后，激活的LTM TCI states除了切换信令指示的TCI state全部去激活。在目标小区指示自身配置下的TCI state前，一直采用切换信令中指示的波束
又例如，其他候选小区的全部去激活，但维护激活的目标小区的LTM TCI states。可选地，在目标小区激活自身的TCI state前，可以继续利用LTM TCI state进行后续的波束指示。可选地，可以规定仅限于激活了的LTM TCI states。在激活信息/指示信令中引入标识区分激活/指示的为LTM TCI state还是目标小区的TCI state
再例如，保留全部激活的LTM TCI state，便于支持后续的LTM，这时需要显示的去激活信令(和Option1的Case2不同，此处TCI可以用于传输，而Option1-Case2的TCI只能用于测量)。可选地，可以规定目标小区必须指示自身的TCI state，在指示前使用切换信令指示的波束，或者，允许在目标小区指示自身的TCI state前，继续利用LTM TCI state进行后续的波束指示，但需要引入标识区分。
方式二：LTM TCI state pool中的TCI state和候选小区的TCI state相关联。
该方式二可以包括如下的示例三和示例四。
示例三、独立的pool，但是pool中的TCI state配置和候选小区的TCI state完全一样
可选地，波束确定方式可以包括：采用指示的TCI state中的CSI-RS的源参考信号SSB。为了避免服务小区要去处理各个候选小区的CSI-RS配置信息，可以把作为QCL source的csi-rs的配置也放到各个候选小区的配置外
切换后的波束指示可以包括多种方式，示例地：
例如，既然完全一样，可以考虑切换完成后retain激活的目标小区的LTM TCI states，且可以认为目标小区自身配置下的TCI state也激活了。可以直接指示这些激活的TCI state，且后续默认信令中指示的重新激活的都为目标小区自身的TCI state。
又例如，保留全部激活的LTM TCI state，便于支持后续的LTM，同样需要显示的去激活信令。同样可以认为目标小区自身配置下的TCI state也激活了，后续目标小区可以直接指示这些激活的TCI state。
示例四、LTM TCI state pool只包含各个候选小区下配置的TCI state的一个ID list。
服务小区要去提前处理各个候选小区的RRC参数，以获得TCI state以及CSI-RS的配置，进入进行波束指示。
这时，不存在实际的LTM TCI state，切换中和切换后的波束指示实际都是目标小区本身的TCI state。
这样，通过上述波束指示方法，可以在切换过程中向终端设备指示目标小区的传输波束，以便终端设备成功切换至目标小区并由目标小区提供数据服务。
在本公开的一些实施例中，提供一种通信系统，该通信系统可以包括终端设备、第一网络设备和第二网络设备，其中，该终端设备可以执行本公开前述实施例中的由终端设备执行的波束指示方法；该第一网络设备可以执行本公开前述实施例中由第一网络设备执行的波束指示方法；该第二网络设备可以执行本公开前述实施例中由第二网络设备执行的波束指示方法。
本公开实施例还提出用于实现以上任一方法的装置，例如，提出一装置，上述装置包括用以实现以上任一方法中终端设备所执行的各步骤的单元或模块。再如，还提出另一装置，包括用以实现以上任一方法中网络设备(例如接入网设备、核心网功能节点、核心网设备等)所执行的各步骤的单元或模块。
应理解以上装置中各单元或模块的划分仅是一种逻辑功能的划分，在实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。此外，装置中的单元或模块可以以处理器调用软件的形式实现：例如装置包括处理器，处理器与存储器连接，存储器中存储有指令，处理器调用存储器中存储的指令，以实现以上任一方法或实现上述装置各单元或模块的功能，其中处理器例如为通用处理器，例如中央处理单元(Central Processing Unit，CPU)或微处理器，存储器为装置内的存储器或装置外的存储器。或者，装置中的单元或模块可以以硬件电路的形式实现，可以通过对硬件电路的设计实现部分或全部单元或模块的功能，上述硬件电路可以理解为一个或多个处理器；例如，在一种实现中，上述硬件电路为专用集成电路(Application-Specific Integrated Circuit，ASIC)，通过对电路内元件逻辑关系的设计，实现以上部分或全部单元或模块的功能；再如，在另一种实现中，上述硬件电路为可以通过可编程逻辑器件(Programmable Logic Device，PLD)实现，以现场可编程门阵列(Field Programmable Gate Array，FPGA)为例，其可以包括大量逻辑门电路，通过配置文件来配置逻辑门电路之间的连接关系，从而实现以上部分或全部单元或模块的功能。以上装置的所有单元或模块可以全部通过处理器调用软件的形式实现，或全部通过硬件电路的形式实现，或部分通过处理器调用软件的形式实现，剩余部分通过硬件电路的形式实现。
在本公开实施例中，处理器是具有信号处理能力的电路，在一种实现中，处理器可以是具有指令读取与运行能力的电路，例如中央处理单元(Central Processing Unit，CPU)、微处理器、图形处理器(Graphics Processing Unit，GPU)(可以理解为微处理器)、或数字信号处理器(Digital Signal Processor，DSP)等；在另一种实现中，处理器可以通过硬件电路的逻辑关系实现一定功能，上述硬件电路的逻辑关系是固定的或可以重构的，例如处理器为专用集成电路(Application-Specific Integrated Circuit，ASIC)或可编程逻辑器件(Programmable Logic Device，PLD)实现的硬件电路,例如FPGA。在可重构的硬件电路中，处理器加载配置文档，实现硬件电路配置的过程，可以理解为处理器加载指令，以实现以上部分或全部单元或模块的功能的过程。此外，还可以是针对人工智能设计的硬件电路，其可以理解为ASIC，例如神经网络处理单元(Neural Network Processing Unit，NPU)、张量处理单元(Tensor Processing Unit，TPU)、深度学习处理单元(Deep learning Processing Unit，DPU)等。
图7A是本公开实施例提出的一种终端设备的结构示意图。如图7A所示，该终端设备101可以包括：收发模块7101、处理模块7102等中的至少一者。在一些实施例中，该收发模块7101，被配置为接收第一网络设备发送的第一信息，所述第一信息触发终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备；该处理模块7102，被配置为根据所述第一信息确定第一传输配置指示TCI状态，所述第一TCI状态指示第一波束，所述第一波束为所述终端设备在执行向所述目标小区的切换过程中使用的波束；确定第二TCI状态，所述第二TCI状态指示第二波束，所述第二波束为所述终端设备在切换至所述目标小区后使用的波束，所述第二TCI状态与所述第一TCI状态相同或不同。
在一些实施例中，所述第一信息包括第一标识和/或第二标识，所述第一标识为所述目标小区的小区标识，所述第二标识用于确定所述第一TCI状态。
在一些实施例中，所述收发模块7101，还被配置为接收所述第一网络设备发送的第二信息，所述第二信息包括所述第一网络设备为所述终端设备预配置的第一TCI集合和候选小区的参数，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为所述第一网络设备为所述终端设备配置的进行波束测量的 小区。
在一些实施例中，所述收发模块7101，还被配置为接收所述第一网络设备发送的第三信息，所述第三信息为所述终端设备激活所述第一TCI集合中的一个或多个候选小区对应的TCI状态。
在一些实施例中，所述第一TCI状态为以下任意一项：
所述第一TCI集合中与所述目标小区对应的TCI状态中的至少一个；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中的至少一个。
在一些实施例中，所述第二TCI状态为以下任意一项：
所述第一TCI状态；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中不同于所述第一TCI状态的至少一个。
在一些实施例中，所述收发模块7101，还被配置为接收第二网络设备发送的第四信息，所述第二网络设备为所述目标小区对应的网络设备，所述第四信息用于确定所述终端设备成功切换至所述目标小区。
在一些实施例中，所述第四信息为所述终端设备在所述目标小区上的第一次调度新传；或者，所述第四信息为预设信息，所述预设信息在所述目标小区第一次调度的物理下行共享信道PDSCH上传输。
在一些实施例中，所述收发模块7101，还被配置为接收第二网络设备发送的第五信息，所述第五信息指示所述终端设备去激活第三TCI状态，所述第三TCI状态为所述第一TCI集合中的全部或部分TCI状态。
在一些实施例中，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
候选小区的同步信号块SSB；
所述候选小区的信道状态信息参考信号CSI-RS。
在一些实施例中，所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
在一些实施例中，所述处理模块7102，还被配置为确定所述终端设备切换至所述目标小区后，保持第四TCI状态处于激活状态，所述第四TCI状态包括以下任意一项：
所述第一TCI状态；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态；
所述第一TCI集合中处于激活状态的TCI状态。
在一些实施例中，所述收发模块7101，还被配置为接收第二网络设备发送的第六信息，所述第六信息指示第五TCI状态，所述第五TCI状态为目标小区自身的TCI状态。
在一些实施例中，所述第六信息用于指示终端设备激活第五TCI状态，并去激活所述第二TCI状态。
在一些实施例中，所述终端设备向所述目标小区切换的方式为基于无随机接入的切换。
图7B是本公开实施例提出的一种第一网络设备的结构示意图。如图7B所示，该第一网络设备1021可以包括：收发模块7201、处理模块7202等中的至少一者。在一些实施例中，该收发模块7201，被配置为向终端设备发送第一信息，所述第一信息触发所述终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备。
在一些实施例中，所述第一信息包括第一标识和/或第二标识，所述第一标识为所述目标小区的小区标识，所述第二标识用于确定第一传输配置指示TCI状态，所述第一TCI状态指示第一波束，所述第一波束为所述终端设备在切换至所述目标小区后使用的波束。
在一些实施例中，所述收发模块7201，被配置为向所述终端设备发送第二信息，所述第二信息包括所述第一网络设备为所述终端设备预配置的第一TCI集合和候选小区的参数，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为所述第一网络设备为所述终端设备配置的进行波束测量的小区。
在一些实施例中，所述收发模块7201，被配置为向所述终端设备发送第三信息，所述第三信息为所述终端设备激活所述第一TCI集合中的一个或多个候选小区对应的TCI状态。
在一些实施例中，所述第一TCI状态为以下任意一项
所述第一TCI集合中与所述目标小区对应的TCI状态中的至少一个；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中的至少一个。
在一些实施例中，所述终端设备通过第二TCI状态确定第二波束，所述第二波束为所述终端设备在切换至所述目标小区后使用的波束；所述第二TCI状态为以下任意一项：
所述第一TCI状态；
所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中不同于所述第一TCI状态的至少一个。
在一些实施例中，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
候选小区的同步信号块SSB；
所述候选小区的信道状态信息参考信号CSI-RS。
在一些实施例中，所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
在一些实施例中，所述终端设备向所述目标小区切换的方式为基于无随机接入的切换。
图7C是本公开实施例提出的一种第二网络设备的结构示意图。如图7C所示，该第二网络设备1022可以包括：收发模块7301、处理模块7302等中的至少一者。在一些实施例中，该收发模块7301，被配置为向终端设备发送第四信息，所述第四信息用于确定所述终端设备成功切换至目标小区，所述第二网络设备为所述目标小区对应的网络设备。
在一些实施例中，所述第四信息为所述终端设备在所述目标小区上的第一次调度新传；或者，所述第四信息为预设信息，所述预设信息在所述目标小区第一次调度的物理下行共享信道PDSCH上传输。
在一些实施例中，所述收发模块7301，被配置为向所述终端设备发送第五信息，所述第五信息指示所述终端设备去激活第三TCI状态，所述第三TCI状态为第一TCI集合中的全部或部分TCI状态，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为第一网络设备为所述终端设备配置的进行波束测量的小区。
在一些实施例中，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
候选小区的同步信号块SSB；
所述候选小区的信道状态信息参考信号CSI-RS。
在一些实施例中，所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
在一些实施例中，所述收发模块7301，被配置为向所述终端设备发送第六信息，所述第六信息指示第五TCI状态，所述第五TCI状态为所述目标小区自身的TCI状态。
在一些实施例中，所述第六信息用于指示终端设备激活第五TCI状态，并去激活所述第二TCI状态。
在一些实施例中，所述终端设备向所述目标小区切换的方式为基于无随机接入的切换。
在一些实施例中，收发模块可以包括发送模块和/或接收模块，发送模块和接收模块可以是分离的，也可以集成在一起。可选地，收发模块可以与收发器相互替换。
在一些实施例中，处理模块可以是一个模块，也可以包括多个子模块。可选地，上述多个子模块分别执行处理模块所需执行的全部或部分步骤。可选地，处理模块可以与处理器相互替换。
图8A是本公开实施例提出的通信设备8100的结构示意图。通信设备8100可以是网络设备(例如接入网设备、核心网设备、第一网络设备、第二网络设备等)，也可以是终端设备(例如用户设备等)，也可以是支持网络设备实现以上任一方法的芯片、芯片系统、或处理器等，还可以是支持终端设备实现以上任一方法的芯片、芯片系统、或处理器等。通信设备8100可用于实现上述方法实施例中描述的方法，具体可以参见上述方法实施例中的说明。
如图8A所示，通信设备8100包括一个或多个处理器8101。处理器8101可以是通用处理器或者专用处理器等，例如可以是基带处理器或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信装置(如，基站、基带芯片，终端设备、终端设备芯片，DU或CU等)进行控制，执行程序，处理程序的数据。可选地，通信设备8100可以用于执行以上任一方法。可选地，一个或多个处理器8101用于调用指令以使得通信设备8100执行以上任一方法。
在一些实施例中，通信设备8100还可以包括一个或多个收发器8102。在通信设备8100包括一个或多个收发器8102时，收发器8102可以执行上述方法中的发送和/或接收等通信步骤(例如步骤S2101、步骤S2103、步骤S2104、步骤S2105、步骤S2107、步骤S2108、步骤S2111、步骤S2112，但不限于此)中的至少一者，处理器8101可以执行其他步骤(例如步骤S2102、步骤S2106、步骤S2110，但不限于此)中的至少一者。
在一些实施例中，收发器可以包括接收器和/或发送器，接收器和发送器可以是分离的，也可以集成在一起。可选地，收发器、收发单元、收发机、收发电路、接口电路、接口等术语可以相互替换，发送器、发送单元、发送机、发送电路等术语可以相互替换，接收器、接收单元、接收机、接收电路等术语可以相互替换。
在一些实施例中，通信设备8100还包括用于存储数据的一个或多个存储器8103。可选地，全部或部分存储器8103也可以处于通信设备8100之外。在可选的实施例中，通信设备8100可以包括一个或多个接口电路8104。可选地，接口电路8104与存储器8103连接，接口电路8104可用于从存储器8103或其他装置接收数据，可用于向存储器8103或其他装置发送数据。例如，接口电路8104可读取存储器8103中 存储的数据，并将该数据发送给处理器8101。
以上实施例描述中的通信设备8100可以是网络设备或者终端设备，但本公开中描述的通信设备8100的范围并不限于此，通信设备8100的结构可以不受图8A的限制。通信设备可以是独立的设备或者可以是较大设备的一部分。例如所述通信设备可以是：(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；(2)具有一个或多个IC的集合，可选地，上述IC集合也可以包括用于存储数据，程序的存储部件；(3)ASIC，例如调制解调器(Modem)；(4)可嵌入在其他设备内的模块；(5)接收机、终端设备、智能终端设备、蜂窝电话、无线设备、手持机、移动单元、车载设备、网络设备、云设备、人工智能设备等等；(6)其他等等。
图8B是本公开实施例提出的芯片8200的结构示意图。对于通信设备8100可以是芯片或芯片系统的情况，可以参见图8B所示的芯片8200的结构示意图，但不限于此。
芯片8200包括一个或多个处理器8201，芯片8200用于执行以上任一方法。
在一些实施例中，芯片8200还包括一个或多个接口电路8204。可选地，接口电路、接口、收发管脚等术语可以相互替换。在一些实施例中，芯片8200还包括用于存储数据的一个或多个存储器8203。可选地，全部或部分存储器8203可以处于芯片8200之外。
可选地，接口电路8204与存储器8203连接，接口电路8204可以用于从存储器8203或其他装置接收数据，接口电路8204可用于向存储器8203或其他装置发送数据。例如，接口电路8204可读取存储器8203中存储的数据，并将该数据发送给处理器8201。
在一些实施例中，接口电路8204执行上述方法中的发送和/或接收等通信步骤(例如步骤S2101、步骤S2103、步骤S2104、步骤S2105、步骤S2107、步骤S2108、步骤S2111、步骤S2112，但不限于此)中的至少一者。接口电路8204执行上述方法中的发送和/或接收等通信步骤例如是指：接口电路8204执行处理器8201、芯片8200、存储器8203或收发器件之间的数据交互。在一些实施例中，处理器8201可以执行其他步骤(例如步骤S2102、步骤S2106、步骤S2110，但不限于此)中的至少一者。
虚拟装置、实体装置、芯片等各实施例中所描述的各模块和/或器件可以根据情况任意组合或者分离。可选地，部分或全部步骤也可以由多个模块和/或器件协作执行，此处不做限定。
本公开实施例还提出存储介质，上述存储介质上存储有指令，当上述指令在通信设备8100上运行时，使得通信设备8100执行以上任一方法。可选地，上述存储介质是电子存储介质。可选地，上述存储介质是计算机可读存储介质，但不限于此，其也可以是其他装置可读的存储介质。可选地，上述存储介质可以是非暂时性(non-transitory)存储介质，但不限于此，其也可以是暂时性存储介质。
本公开实施例还提出程序产品，上述程序产品被通信设备8100执行时，使得通信设备8100执行以上任一方法。可选地，上述程序产品可以是计算机程序产品。
本公开实施例还提出计算机程序，当其在计算机上运行时，使得计算机执行以上任一方法。

Claims (36)

  1. 一种波束指示方法，其特征在于，由终端设备执行，所述方法包括：
    接收第一网络设备发送的第一信息，所述第一信息触发终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备；
    根据所述第一信息确定第一传输配置指示TCI状态，所述第一TCI状态指示第一波束，所述第一波束为所述终端设备在执行向所述目标小区的切换过程中使用的波束；
    确定第二TCI状态，所述第二TCI状态指示第二波束，所述第二波束为所述终端设备在切换至所述目标小区后使用的波束，所述第二TCI状态与所述第一TCI状态相同或不同。
  2. 根据权利要求1所述的方法，其特征在于，所述第一信息包括第一标识和/或第二标识，所述第一标识为所述目标小区的小区标识，所述第二标识用于确定所述第一TCI状态。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    接收所述第一网络设备发送的第二信息，所述第二信息包括所述第一网络设备为所述终端设备预配置的第一TCI集合和候选小区的参数，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为所述第一网络设备为所述终端设备配置的进行波束测量的小区。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    接收所述第一网络设备发送的第三信息，所述第三信息为所述终端设备激活所述第一TCI集合中的一个或多个候选小区对应的TCI状态。
  5. 根据权利要求3或4所述的方法，其特征在于，所述第一TCI状态为以下任意一项：
    所述第一TCI集合中与所述目标小区对应的TCI状态中的至少一个；
    所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中的至少一个。
  6. 根据权利要求3至5中任一项所述的方法，其特征在于，所述第二TCI状态为以下任意一项：
    所述第一TCI状态；
    所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中不同于所述第一TCI状态的至少一个。
  7. 根据权利要求3至6中任一项所述的方法，其特征在于，所述方法还包括：
    接收第二网络设备发送的第四信息，所述第二网络设备为所述目标小区对应的网络设备，所述第四信息用于确定所述终端设备成功切换至所述目标小区。
  8. 根据权利要求7所述的方法，其特征在于，
    所述第四信息为所述终端设备在所述目标小区上的第一次调度新传；或者，
    所述第四信息为预设信息，所述预设信息在所述目标小区第一次调度的物理下行共享信道PDSCH上传输。
  9. 根据权利要求3至8中任一项所述的方法，其特征在于，所述方法还包括：
    接收第二网络设备发送的第五信息，所述第五信息指示所述终端设备去激活第三TCI状态，所述第三TCI状态为所述第一TCI集合中的全部或部分TCI状态。
  10. 根据权利要求3至9中任一项所述的方法，其特征在于，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
    候选小区的同步信号块SSB；
    所述候选小区的信道状态信息参考信号CSI-RS。
  11. 根据权利要求3至9中任一项所述的方法，其特征在于，
    所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，
    所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
  12. 根据权利要求3至11中任一项所述的方法，其特征在于，所述方法还包括：
    确定所述终端设备切换至所述目标小区后，保持第四TCI状态处于激活状态，所述第四TCI状态包括以下任意一项：
    所述第一TCI状态；
    所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态；
    所述第一TCI集合中处于激活状态的TCI状态。
  13. 根据权利要求1至12中任一项所述的方法，其特征在于，所述方法还包括：
    接收第二网络设备发送的第六信息，所述第六信息指示第五TCI状态，所述第五TCI状态为目标小区自身的TCI状态。
  14. 根据权利要求13所述的方法，其特征在于，所述第六信息用于指示终端设备激活第五TCI状态，并去激活所述第二TCI状态。
  15. 一种波束指示方法，其特征在于，由第一网络设备执行，所述方法包括：
    向终端设备发送第一信息，所述第一信息触发所述终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备。
  16. 根据权利要求15所述的方法，其特征在于，所述第一信息包括第一标识和/或第二标识，所述第一标识为所述目标小区的小区标识，所述第二标识用于确定第一传输配置指示TCI状态，所述第一TCI状态指示第一波束，所述第一波束为所述终端设备在切换至所述目标小区后使用的波束。
  17. 根据权利要求16所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第二信息，所述第二信息包括所述第一网络设备为所述终端设备预配置的第一TCI集合和候选小区的参数，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为所述第一网络设备为所述终端设备配置的进行波束测量的小区。
  18. 根据权利要求17所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第三信息，所述第三信息为所述终端设备激活所述第一TCI集合中的一个或多个候选小区对应的TCI状态。
  19. 根据权利要求17或18所述的方法，其特征在于，所述第一TCI状态为以下任意一项：
    所述第一TCI集合中与所述目标小区对应的TCI状态中的至少一个；
    所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中的至少一个。
  20. 根据权利要求17至19中任一项所述的方法，其特征在于，所述终端设备通过第二TCI状态确定第二波束，所述第二波束为所述终端设备在切换至所述目标小区后使用的波束；所述第二TCI状态为以下任意一项：
    所述第一TCI状态；
    所述第一TCI集合中处于激活状态并且与所述目标小区对应的TCI状态中不同于所述第一TCI状态的至少一个。
  21. 根据权利要求17至20中任一项所述的方法，其特征在于，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
    候选小区的同步信号块SSB；
    所述候选小区的信道状态信息参考信号CSI-RS。
  22. 根据权利要求17至20中任一项所述的方法，其特征在于，
    所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，
    所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
  23. 根据权利要求15至22中任一项所述的方法，其特征在于，所述终端设备向所述目标小区切换的 方式为基于无随机接入的切换。
  24. 一种波束指示方法，其特征在于，由第二网络设备执行，所述方法包括：
    向终端设备发送第四信息，所述第四信息用于确定所述终端设备成功切换至目标小区，所述第二网络设备为所述目标小区对应的网络设备。
  25. 根据权利要求24所述的方法，其特征在于，
    所述第四信息为所述终端设备在所述目标小区上的第一次调度新传；或者，
    所述第四信息为预设信息，所述预设信息在所述目标小区第一次调度的物理下行共享信道PDSCH上传输。
  26. 根据权利要求24或25所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第五信息，所述第五信息指示所述终端设备去激活第三TCI状态，所述第三TCI状态为第一TCI集合中的全部或部分TCI状态，所述第一TCI集合包括候选小区对应的TCI状态，所述候选小区为第一网络设备为所述终端设备配置的进行波束测量的小区。
  27. 根据权利要求26所述的方法，其特征在于，所述TCI状态包括准共址QCL源，所述QCL源包括以下至少一项：
    候选小区的同步信号块SSB；
    所述候选小区的信道状态信息参考信号CSI-RS。
  28. 根据权利要求26所述的方法，其特征在于，
    所述第一TCI集合为各个候选小区的第二TCI集合的并集，所述第二TCI集合为候选小区自身的TCI集合；或者，
    所述第一TCI集合包括至少一个TCI标识，一个TCI标识对应所述第二TCI集合中的一个TCI状态。
  29. 根据权利要求25至28中任一项所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第六信息，所述第六信息指示第五TCI状态，所述第五TCI状态为所述目标小区自身的TCI状态。
  30. 根据权利要求25至29中任一项所述的方法，其特征在于，所述第六信息用于指示终端设备激活第五TCI状态，并去激活所述第二TCI状态。
  31. 一种终端设备，其特征在于，包括：
    收发模块，被配置为接收第一网络设备发送的第一信息，所述第一信息触发终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备；
    处理模块，被配置为根据所述第一信息确定第一传输配置指示TCI状态，所述第一TCI状态指示第一波束，所述第一波束为所述终端设备在执行向所述目标小区的切换过程中使用的波束；确定第二TCI状态，所述第二TCI状态指示第二波束，所述第二波束为所述终端设备在切换至所述目标小区后使用的波束，所述第二TCI状态与所述第一TCI状态相同或不同。
  32. 一种第一网络设备，其特征在于，包括：
    收发模块，被配置为向终端设备发送第一信息，所述第一信息触发所述终端设备执行向目标小区的切换，所述第一网络设备为所述终端设备的当前服务小区对应的网络设备。
  33. 一种第二网络设备，其特征在于，包括：
    收发模块，被配置为向终端设备发送第四信息，所述第四信息用于确定所述终端设备成功切换至目标小区，所述第二网络设备为所述目标小区对应的网络设备。
  34. 一种通信设备，其特征在于，包括：
    一个或多个处理器；
    其中，所述通信设备用于执行权利要求1至14、权利要求15至23或权利要求24至30中任一项所述的波束指示方法。
  35. 一种存储介质，所述存储介质存储有指令，其特征在于，当所述指令在通信设备上运行时，使得所述通信设备执行如权利要求1至14、权利要求15至23或权利要求24至30中任一项所述的波束指示方法。
  36. 一种通信系统，其特征在于，所述通信系统包括终端设备、第二网络设备和第二网络设备，其中，所述终端设备被配置为实现权利要求1至14中任一项所述的波束指示方法，所述第一网络设备被配置为实现权利要求15至23中任一项所述的波束指示方法，所述第二网络设备被配置为实现权利要求24至30中任一项所述的波束指示方法。
PCT/CN2023/131649 2023-11-14 2023-11-14 波束指示方法、设备和存储介质 Pending WO2025102249A1 (zh)

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