WO2020108089A1 - 跟踪区更新的方法、传输广播消息的方法和通信装置 - Google Patents

跟踪区更新的方法、传输广播消息的方法和通信装置 Download PDF

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Publication number
WO2020108089A1
WO2020108089A1 PCT/CN2019/109432 CN2019109432W WO2020108089A1 WO 2020108089 A1 WO2020108089 A1 WO 2020108089A1 CN 2019109432 W CN2019109432 W CN 2019109432W WO 2020108089 A1 WO2020108089 A1 WO 2020108089A1
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Prior art keywords
tac
broadcast message
cycle
list
broadcast
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PCT/CN2019/109432
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English (en)
French (fr)
Inventor
于天航
李榕
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华为技术有限公司
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2021530090A priority Critical patent/JP7209088B2/ja
Priority to KR1020217019389A priority patent/KR102491245B1/ko
Priority to CA3121287A priority patent/CA3121287A1/en
Priority to EP19889481.8A priority patent/EP3879858B1/en
Publication of WO2020108089A1 publication Critical patent/WO2020108089A1/zh
Priority to US17/332,699 priority patent/US11889583B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H04W8/14—Mobility data transfer between corresponding nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks
    • 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
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer

Definitions

  • the present application relates to the field of communications, and in particular to a method for updating a tracking area, a method for transmitting broadcast messages, and a communication device.
  • Satellite communication has the advantages of wide coverage, long communication distance, high reliability, high flexibility and high throughput. It is not affected by geographical environment, climatic conditions and natural disasters, and has been widely used in aviation communication, maritime communication, military communication, etc. field.
  • 5G 5th-generation
  • 5G 5th-generation
  • Introducing satellites into the future 5th-generation (5G) mobile network (5G) can provide communication services for areas that are difficult to cover by terrestrial networks, such as oceans and forests, and can enhance the reliability of 5G communications, such as trains and aircraft And users on these vehicles provide more stable and better communication services, and can also provide more data transmission resources to support a greater number of connections.
  • the tracking area (TA) update signaling overhead is relatively large, and how to reduce the TA update signaling overhead becomes an urgent technical problem to be solved.
  • the present application provides a tracking area update method, a broadcast message transmission method, and a communication device, which can reduce signaling overhead.
  • a method for updating a tracking area TA includes:
  • the terminal device receives a broadcast message periodically sent by the satellite device, where the broadcast message alternately carries the tracking area code TAC corresponding to one or more TAs in at least two tracking areas TA, and the coverage area of the beam of the satellite device belongs to the At least two TAs;
  • the terminal device When detecting for the first time that the TA corresponding to the TAC in the broadcast message received in the current period does not belong to the first TA list, the terminal device records the TA in the second TA list, where the first TA list includes For paging one or more TAs of the terminal device, the second TA list is used to store detected TAs different from the first TA list;
  • the terminal device continues to detect the subsequent broadcast message, and determines whether to initiate the TA update process according to the TAC in the subsequent broadcast message.
  • the terminal device when the terminal device first detects that the TA corresponding to the TAC in the broadcast message received in the current period does not belong to the first TA list, it does not immediately initiate the TA update process, and determines whether to initiate the TA update according to the TAC in the subsequent broadcast message. Therefore, the implementation of the present application can avoid the problem that initiating the TA update process directly when it is detected that the TA does not belong to the TA list may cause unnecessary signaling overhead.
  • multiple TACs are assigned to a satellite beam that simultaneously covers multiple TAs, and a method of periodically broadcasting multiple TACs or broadcasting multiple TACs at once may be adopted.
  • the terminal device detects that the satellite beam TAC has changed, it may not immediately perform the TA update, but confirm that there is no TAC of the TA to which it belongs in an alternate broadcast period, and then perform the TA update, thereby avoiding the "TAC hard handover" caused by Some terminal equipment may incur signaling overhead caused by unnecessary TA updates.
  • the embodiment of the present application does not need to allocate a larger TA list, thereby saving paging resources.
  • the first TA list may be maintained by the network side (for example, the core network side or the satellite device side), and the terminal device needs to obtain or update the first TA list from the network side, for example, The first TA list is obtained by the terminal device through high-level signaling.
  • the second TA list is maintained by the terminal device, and the second TA list is determined by the terminal device itself.
  • the first TA list is obtained by the terminal device from a satellite device.
  • the core network device may determine the first TA list and send the first TA list to the terminal device through the satellite device.
  • the core network device may page the terminal device through the first TA list.
  • all beams of the TAs on the first TA list that is, beams covering the TAs in the first TA list
  • the terminal device continues to detect the subsequent broadcast message, and determines whether to initiate the TA update process according to the TAC in the subsequent broadcast message, including:
  • the terminal device records the TA in the second TA list when the TA corresponding to the TAC in the broadcast message after detection does not belong to the first TA list and does not belong to the second TA list;
  • the terminal device After the terminal device detects that the TA corresponding to the TAC in the broadcast message does not belong to the first TA list and belongs to the second list, the terminal device initiates a TA update process to update the first TA list, while clearing the second TA list.
  • the terminal device does not initiate a TA update process when the TA corresponding to the TAC in the broadcast message after detection does not belong to the first TA list and does not belong to the second TA list; after the terminal device detects When there is at least one TA belonging to the first TA list in the TA corresponding to the TAC in the broadcast message, the TA update process is not initiated; only the TA corresponding to the TAC in the broadcast message after the terminal device detects that it does not belong to the TA When the first TA list is included and belongs to the second list, the terminal device initiates a TA update process to update the first TA list.
  • the TA update process may be that the terminal device sends a request to the core network device through the satellite device to obtain the updated TA list.
  • the TA update process may refer to the description in the existing standard, which will not be repeated here.
  • a broadcast message sent in one cycle carries one TAC
  • a broadcast message sent in one cycle carries multiple TACs.
  • the terminal device when a broadcast message carries a TAC, the terminal device needs to wait for the broadcast message after reception, and decide whether to initiate the TA update process according to the TAC in the subsequent broadcast message. In this case, the terminal device needs to wait for the terminal device to judge for multiple cycles to determine whether the TA update process needs to be initiated.
  • the waiting time may be longer.
  • the determination time of the terminal device can be reduced. That is, the waiting time for the terminal device to determine whether to initiate the TA update process is shortened.
  • the TAC field in the satellite communication broadcast signal can be expanded. Assuming that the original TAC field contains y bits of information, the expanded TAC field contains Ny bits of information. Each y bit of information can correspond to the same TAC or multiple different TAC.
  • the satellite beam may not broadcast TAC periodically, but broadcast multiple TACs at a time.
  • the satellite device may also periodically broadcast the TAC alternately, and broadcast broadcast messages in a multi-TAC manner at a time, which can reduce user waiting time.
  • the broadcast message carries first indication information, and the first indication information indicates whether the broadcast message sequentially carries TAC alternately.
  • the first indication information is one or more bits in the multiplexed TAC field, or the first indication information is a newly added one in the TAC field or Multiple bits.
  • the terminal device can determine whether the beam is in the stage of periodically alternating broadcast of TAC through the first indication information. For the first indication information indicating that the broadcast message does not carry TAC alternately in sequence, the terminal device can immediately execute the TA update process after listening to the change of TAC, without waiting for the TAC of the next periodic beam broadcast, thereby saving waiting time and updating more timely TA list.
  • the broadcast message carries second indication information
  • the second indication information is used to indicate at least one of the following information:
  • the number of consecutive broadcasts of the same TAC the number of consecutive broadcast cycles of the same TAC, the continuous broadcast time of the same TAC, and the number of alternately broadcast TACs.
  • the second indication information is one or more bits in the multiplexed TAC field, or the second indication information is a newly added one in the TAC field or Multiple bits.
  • the terminal device can no longer continuously monitor the TAC broadcast by the satellite beam, but can choose to continue to monitor the broadcast message after a certain number of cycles and a period of time. Therefore, the embodiments of the present application can save resources and reduce the computing overhead of the terminal device.
  • a method for transmitting broadcast signals includes:
  • the satellite device determines that the coverage area of the beam belongs to at least two tracking areas TA;
  • the satellite device periodically sends a broadcast message through the beam, and the broadcast message alternately carries a tracking area code TAC corresponding to one or more of the at least two TAs.
  • the satellite device may determine that the beam coverage area belongs to at least two tracking areas TA according to the ephemeris information, or the satellite device determines that the beam coverage area belongs to at least two tracking areas TA according to the instruction of the core network device.
  • the ephemeris information may be information stored locally by the satellite device, and the ephemeris information may include beam information of the satellite device (for example, information such as the coverage area of the beam), movement trajectory, and other information. this.
  • multiple TACs are assigned to a satellite beam that simultaneously covers multiple TAs, and a method of periodically broadcasting multiple TACs or broadcasting multiple TACs at once may be adopted.
  • the terminal device detects that the satellite beam TAC has changed, it may not immediately perform the TA update, but confirm that there is no TAC of the TA to which it belongs in an alternate broadcast period, and then perform the TA update, thereby avoiding the "TAC hard handover" caused by Some terminal equipment may incur signaling overhead caused by unnecessary TA updates.
  • the embodiment of the present application does not need to allocate a larger TA list, thereby saving paging resources.
  • the satellite device periodically sends broadcast messages, including:
  • the satellite device periodically sends a broadcast message according to the first correspondence between the periodic information of the broadcast message and the TAC;
  • the first correspondence relationship is pre-stored in the satellite device, or the first correspondence relationship is notified by the core network device.
  • the cycle information includes a sequence number of each cycle
  • the first correspondence includes each cycle sequence number of periodically sending broadcast messages and a TAC corresponding to each cycle sequence number.
  • the cycle information includes a start time of each cycle
  • the first correspondence includes the start time of each cycle of periodically sending broadcast messages and the TAC corresponding to the start time of each cycle.
  • the cycle information includes a start time of the cycle, and the first relationship includes each TAC and its corresponding cycle start time;
  • the satellite device may send a broadcast message in one or more periods between the period start time corresponding to one TAC and the period end time corresponding to the one TAC (that is, the period start time corresponding to the next TAC). Both carry this TAC.
  • the period information includes the start sequence number of the period, and the first relationship includes the start sequence number of each TAC and its corresponding period;
  • the satellite device may send the broadcast message in one or more cycles between the cycle start sequence number corresponding to one TAC and the cycle end sequence number corresponding to the one TAC (that is, the cycle start sequence number corresponding to the next TAC). All carry the one TAC.
  • the cycle information includes a cycle termination time, and the first relationship includes each TAC and its corresponding cycle termination time;
  • the satellite device may send a broadcast in one or more cycles between the cycle start time corresponding to a TAC (that is, the cycle end time of the previous TAC of the TAC) and the cycle end time corresponding to the TAC.
  • a TAC that is, the cycle end time of the previous TAC of the TAC
  • Each TAC is carried in the message.
  • the cycle information includes a cycle termination sequence number, and the first relationship includes each TAC and its corresponding cycle termination sequence number;
  • the satellite device may send a broadcast in one or more cycles between the cycle start sequence number corresponding to one TAC (that is, the cycle termination sequence number of the previous TAC of the one TAC) and the cycle termination sequence number corresponding to the one TAC Each TAC is carried in the message.
  • the cycle information includes a cycle time interval, and the first relationship includes each TAC and its corresponding cycle time interval;
  • the satellite device may carry the TAC in the broadcast message sent in one or more cycles corresponding to the cycle time interval corresponding to the TAC.
  • the period information includes a period serial number interval, and the first relationship includes each TAC and its corresponding period serial number interval;
  • the satellite device may carry the TAC in the broadcast message sent in one or more cycles corresponding to the period sequence number interval corresponding to the TAC.
  • the cycle information includes the number of cycles, and the first relationship includes each TAC and its corresponding number of cycles.
  • the satellite device may carry the TAC in broadcast messages sent in one or more cycles corresponding to the number of cycles corresponding to the TAC.
  • the satellite device can determine the specific method for sending the TAC through the correspondence between the period information and the TAC. Since the correspondence includes each TAC and its corresponding period information, each period number or period corresponds to the TAC. Compared with the relationship, the amount of data is small. When the correspondence relationship exists in the ephemeris information, the data amount of the ephemeris information can be reduced. When the correspondence relationship is indicated by the core network, the signaling overhead can be reduced, saving Resources.
  • each TAC terminal device may be detected only once, which can save calculation overhead.
  • a broadcast message sent in one cycle carries one TAC
  • a broadcast message sent in one cycle carries multiple TACs.
  • the broadcast message carries first indication information, where the first indication information is used to indicate whether the broadcast message alternately carries TAC in turn.
  • the first indication information is multiplexing one or more bits in the TAC field, or the first indication information is a newly added one in the TAC field or Multiple bits.
  • the terminal device can determine whether the beam is in the stage of periodically alternating broadcast of TAC through the first indication information. For the first indication information indicating that the broadcast message does not carry TAC alternately in sequence, the terminal device can immediately execute the TA update process after listening to the change of TAC, without waiting for the TAC of the next periodic beam broadcast, thereby saving waiting time and updating more timely TA list.
  • the broadcast message carries second indication information
  • the second indication information is used to indicate at least one of the following information:
  • the number of consecutive broadcasts of the same TAC the number of consecutive broadcast cycles of the same TAC, the continuous broadcast time of the same TAC, and the number of alternately broadcast TACs.
  • the second indication information is multiplexing one or more bits in the TAC field, or the second indication information is a newly added one in the TAC field or Multiple bits.
  • the terminal device can no longer continuously monitor the TAC broadcast by the satellite beam, but can choose to continue to monitor the broadcast message after a certain number of cycles and a period of time. Therefore, the embodiments of the present application can save resources and reduce the computing overhead of the terminal device.
  • a communication device including various modules or units for performing the method in the first aspect or any possible implementation manner of the first aspect.
  • the communication device is a terminal device.
  • a communication device including various modules or units for performing the method in the second aspect or any possible implementation manner of the second aspect.
  • the communication device is satellite equipment.
  • a communication device including a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory so that the network device executes the method in the first aspect and its possible implementation.
  • the communication device is a terminal device.
  • a communication device including a transceiver, a processor, and a memory.
  • the processor is used to control the transceiver to send and receive signals
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program from the memory, so that the terminal device executes the method in the second aspect and its possible implementation.
  • the communication device is satellite equipment.
  • a computer-readable medium on which a computer program is stored, which when executed by a computer implements the method in the first aspect and its possible implementation.
  • a computer-readable medium on which a computer program is stored, which when executed by a computer implements the method in the second aspect and possible implementations thereof.
  • a computer program product which implements the method in the first aspect and possible implementation manners when the computer program product is executed by a computer.
  • a computer program product which when executed by a computer implements the method in the second aspect and its possible implementation.
  • a processing device including a processor and an interface.
  • a processing device including a processor, an interface, and a memory.
  • the processor is configured to be executed as an execution subject of the method in the first aspect to the second aspect or any possible implementation manner of the first aspect to the second aspect
  • related data interaction processes are completed through the above interface.
  • the above interface may further complete the above data interaction process through a transceiver.
  • the processing device in the above eleventh or twelfth aspect may be a chip, and the processor may be implemented by hardware or software.
  • the processor When implemented by hardware, the processor may be a logic circuit, Integrated circuits, etc.; when implemented by software, the processor may be a general-purpose processor, implemented by reading software codes stored in a memory, the memory may be integrated in the processor, or may be located outside the processor, Exist independently.
  • a system including the aforementioned satellite equipment and terminal equipment.
  • FIG. 1 is a schematic diagram of a mobile satellite communication system scenario applicable to an embodiment of the present application.
  • Figure 2 is a schematic diagram of a TA method.
  • FIG. 3 is a schematic diagram of beam movement according to an embodiment of the present application.
  • FIG. 4 is an interactive schematic diagram of a TA update method according to an embodiment of the present application.
  • FIG. 5 is a flowchart of a TA update method according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of first indication information according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of first indication information according to another embodiment of the present application.
  • FIG. 8 is a flowchart of a TA update method according to another embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a communication device of the present application.
  • FIG. 10 is a schematic block diagram of a terminal device of the present application.
  • 11 is a schematic block diagram of another communication device of the present application.
  • FIG. 12 is a schematic block diagram of a satellite device of the present application.
  • FIG. 1 is a schematic diagram of a mobile satellite communication system scenario applicable to an embodiment of the present application.
  • the system scenario shown in FIG. 1 includes one or more satellite devices, terminal devices located within the beam coverage of the satellite devices, and core network devices.
  • the satellite device can be connected to the core network device, the satellite device can provide communication services to the terminal device, the core network device can page the terminal device through the satellite device, for example, the core network device can search through the satellite device Call terminal equipment that is located within the beam coverage of the satellite equipment.
  • the terminal device in the embodiment of the present application may be a device with a wireless communication function, for example, may be various handheld devices with a wireless communication function, in-vehicle devices, wearable devices, computing devices, or other processing connected to a wireless modem device.
  • the terminal device may also be a subscriber unit, a cellular phone, a smart phone, a wireless data card, a personal digital assistant computer, a tablet computer, a wireless modem, a handheld device, a laptop computer, a machine type communication terminal, and Wireless communication-enabled computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, smart home devices, drone devices, and terminal devices in future 5G networks or public land mobile communication networks that evolve in the future (public The terminal equipment in the land mobile network (PLMN) is not limited in the embodiments of the present application.
  • PLMN public The terminal equipment in the land mobile network
  • the core network device may be a mobility management device, for example, core network elements such as access and mobility management (AMF) network elements may be responsible for control plane mobility And access management, such as estimating which satellite services a user might be served, thereby designing a TA list, and sending the TA list to the user.
  • AMF access and mobility management
  • Satellite equipment is divided into high-orbit, medium-orbit and low-orbit satellite equipment according to its orbital altitude.
  • High-orbit satellites are stationary relative to the ground, and one or more high-orbit satellites can provide communication services for fixed areas.
  • Non-high-orbit satellites for example, non-geostationary earth (NGEO) satellite equipment, including medium- and low-orbit satellites, which move at high speed relative to the ground, have their own trajectories, and generally require multiple satellites to be coordinated to be fixed Area provides communication.
  • NGEO non-geostationary earth
  • the satellite device in the embodiment of the present application may be any of the foregoing satellite devices.
  • the satellite device in the embodiment of the present application may be a non-geostationary earth (NGEO) satellite device.
  • NGEO non-geostationary earth
  • one satellite device may have one or more beams, for example, a satellite device may have 12 or 16 beams, etc.
  • the embodiment of the present application does not limit this.
  • the core network can page the terminal device through the satellite device according to the assigned tracking area (TA) list of the terminal device.
  • the terminal device can locally store a TA list, which includes One or more TA.
  • the first TA list is allocated to the terminal device by the network side (for example, the core network device).
  • the core network needs to cover all the TAs in the TA list through the satellite device.
  • the terminal equipment is paged on the satellite beam.
  • TA is a concept set for terminal device location management.
  • Each TA has its tracking area identification (TAI), which can be calculated by tracking area code (TAC) and public land mobile network (PLMN) identification.
  • TAI tracking area identification
  • PLMN public land mobile network
  • the terminal device receives the TAC broadcast by the base station, it calculates the TAI and compares it with the TA list assigned to it by the core network. If it is found that the TAC broadcast by the current satellite device is not in its assigned TA list, for example, due to Move, so that the TA area of the terminal device may change, causing the TA of the terminal device to not exist in the TA list stored in the terminal device. In this case, the terminal device needs to initiate a TA update process.
  • the network side For example, the core network) redistributes the TA list to the terminal device to update the local TA list of the terminal device.
  • Figure 2 is a method of tracking area update. Specifically, as shown in FIG. 2, the terminal device first monitors the TAC broadcast by the satellite beam, and then calculates the TAI using the detected TAC and compares it with its own TA list. If it does not belong to its own TA list, the TA update process is initiated; otherwise , Continue to monitor TAC.
  • the prior art proposes to fix the TA of the satellite network to the ground.
  • the geographic area is bound, and the TA does not move with the satellite beam. Therefore, the tracking area code (TAC) of the satellite coverage area needs to be changed according to certain rules.
  • TAC tracking area code
  • the terminal device is in the TA area, and the coverage of the satellite beam moves from being completely in one TA (such as TA1) to being completely in another TA (such as TA2), not a jump. Process, but a slowly changing process.
  • one satellite beam covers two or more TAs at the same time. For example, as shown in the middle diagram of FIG. 3, the beams cover TA1 and TA2 simultaneously. Since only one TAC can be carried in the existing satellite broadcast message, "hard handover" is required in the existing satellite communication, that is, in the transitional phase of TA handover, the TAC corresponding to TA1 is replaced with the one corresponding to TA2 in the broadcast message.
  • TAC when the terminal device is in the TA1 area, TA2 may not exist in the TA list of the terminal device, causing the terminal device to initiate a TA update process. However, in this case, the terminal device is still within the range of TA1, and there is no need for TA update, which results in unnecessary signaling overhead.
  • the TA list that the network-side device can allocate to the terminal device is (TA1, TA2).
  • TA1 TA2
  • paging the terminal device needs to page on all satellite beams of the TAC broadcasting the TA in the TA list. For terminal devices with a fixed or small range of motion That said, this is undoubtedly a waste of paging resources.
  • an embodiment of the present application proposes a TA update method.
  • a satellite beam that simultaneously covers multiple TAs is allocated multiple TACs, and multiple TACs may be periodically broadcast alternately. Or broadcast multiple TAC at once.
  • the terminal device detects that the satellite beam TAC has changed, it may not immediately perform TA update, but confirm that there is no TAC of the TA to which it belongs in an alternate broadcast period, and then perform TA update, thereby avoiding the "TAC hard handover"
  • Some terminal equipment may incur signaling overhead caused by unnecessary TA updates.
  • the embodiment of the present application does not need to allocate a larger TA list, thereby saving paging resources.
  • the method shown in FIG. 4 can be applied to the satellite communication system shown in FIG. 1. Specifically, the method shown in FIG. 4 includes:
  • the satellite device determines that the coverage area of the beam belongs to at least two tracking areas TA.
  • the satellite device may determine that the beam coverage area belongs to at least two tracking areas TA according to the ephemeris information, or the satellite device determines that the beam coverage area belongs to at least two tracking areas TA according to the instruction of the core network device.
  • the ephemeris information may be information stored locally by the satellite device, and the ephemeris information may include beam information of the satellite device (for example, information such as the coverage area of the beam), movement trajectory, and other information. this.
  • the satellite device periodically sends a broadcast message through the beam, and the broadcast message alternately carries the tracking area code TAC corresponding to one or more of the at least two TAs.
  • the terminal device receives the broadcast message periodically sent by the satellite device.
  • the satellite device may sequentially carry broadcast messages of the tracking area code TAC corresponding to one or more of the at least two TAs in turn.
  • the satellite device may send a broadcast message that alternately carries TAC1 corresponding to TA1 and TAC2 corresponding to TA2. For example, one period broadcasts the broadcast message carrying TAC1, the next period broadcasts the broadcast message carrying TAC2, and the next period broadcasts the broadcast message carrying TAC1, ... send the broadcast message in this way.
  • the satellite device may send TACs corresponding to the three TAs alternately, namely, TAC corresponding to TA1, TAC2 corresponding to TA2, and TA3 corresponding to TA3 TAC3, for example, the sequence of TAC carried in the broadcast message sent is TAC1, TAC2, TAC3, TAC1, TAC2, TAC3...
  • TAC alternate broadcast period in the embodiment of the present application may be a period when a satellite beam covers multiple TAs, and all TACs to be broadcast are alternately broadcast once, such as when alternately broadcasting TAC1, TAC2, and TAC3
  • the broadcasted TAC is ⁇ TAC1, TAC2, TAC3, TAC1, TAC2, TAC3,... ⁇ .
  • the alternate broadcast period can be the time of broadcasting ⁇ TAC1, TAC2, TAC3 ⁇ or the time of broadcasting ⁇ TA2, TA3, TA1 ⁇
  • the duration of one TAC alternate broadcast cycle is equal to the duration of 3 cycles of sending broadcast messages.
  • the order of TAC carried in each TAC alternate broadcast period is not limited to the above-mentioned TAC1, TAC2, and TAC3.
  • the order of carrying TAC in one TAC alternate broadcast period may be arbitrarily changed.
  • the order of carrying TAC in one TAC alternate broadcast period is TAC3, TAC1, TAC2.
  • the sequence of TAC carried in consecutive broadcast messages is TAC1, TAC2, TAC3, TAC2, TAC1, TAC3, TAC3, TAC1, TAC2...
  • the terminal device When the terminal device first detects that the TA corresponding to the TAC in the broadcast message received in the current period does not belong to the first TA list, the TA is recorded in the second TA list, where the first TA list includes One or more TAs of the terminal device are paged, and the second TA list is used to store detected TAs different from the first TA list.
  • the terminal device when the terminal device first detects that the TA corresponding to the TAC in the broadcast message received in the current period does not belong to the first TA list, it does not immediately initiate a TA update process and records the TA in the second TA list in.
  • the first TA list may be maintained by the network side (for example, the core network side or the satellite device side), and the terminal device needs to obtain or update the first TA list from the network side, for example, The first TA list is obtained by the terminal device through high-level signaling.
  • the second TA list is maintained by the terminal device, and the second TA list is determined by the terminal device itself.
  • the first TA list is obtained by the terminal device from a satellite device.
  • the core network device may determine the first TA list and send the first TA list to the terminal device through the satellite device.
  • the core network device may page the terminal device through the first TA list.
  • all beams of the TAs on the first TA list that is, beams covering the TAs in the first TA list
  • the terminal device continues to detect the subsequent broadcast message, and determines whether to initiate the TA update process according to the TAC in the subsequent broadcast message.
  • the terminal device when the terminal device first detects that the TA corresponding to the TAC in the broadcast message received in the current period does not belong to the first TA list, it does not immediately initiate the TA update process, and determines whether to initiate the TA update according to the TAC in the subsequent broadcast message. Process. Therefore, the implementation of the present application can avoid the problem that the paging resource may be wasted if the TA update process is directly initiated when it is detected that the TA does not belong to the TA list.
  • the terminal device continues to detect the subsequent broadcast message, and determines whether to initiate the TA update process according to the TAC in the subsequent broadcast message, including:
  • the terminal device records the TA in the second TA list when the TA corresponding to the TAC in the broadcast message after detection does not belong to the first TA list and does not belong to the second TA list;
  • the second TA list is cleared;
  • the terminal device checks that the TA corresponding to the TAC in the broadcast message does not belong to the first TA list and belongs to the second list, the terminal device sends a TA update process to update the The first TA list, and at the same time clear the second TA list.
  • the terminal device does not initiate a TA update process when the TA corresponding to the TAC in the broadcast message after detection does not belong to the first TA list and does not belong to the second TA list; after the terminal device detects When there is at least one TA belonging to the first TA list in the TA corresponding to the TAC in the broadcast message, the TA update process is not initiated; only the TA corresponding to the TAC in the broadcast message after the terminal device detects that it does not belong to the TA When the first TA list is included and belongs to the second list, the terminal device initiates a TA update process to update the first TA list.
  • the TA update process may be that the terminal device sends a request to the core network device through the satellite device to obtain the updated TA list.
  • the TA update process may refer to the description in the existing standard, which will not be repeated here.
  • a broadcast message sent in one cycle may carry one TAC; optionally, a broadcast message sent in one cycle may also carry multiple TACs.
  • one broadcast message carries one TAC in 420.
  • the case in which one broadcast message carries multiple TACs is similar to the above case in which one TAC is carried.
  • a broadcast message carries two TACs, and when a beam coverage area of a satellite device belongs to multiple TAs, for example, 4 TAs, the satellite device may send TACs corresponding to the 4 TAs alternately, that is, TAC1 corresponding to TA1.
  • TAC2 corresponding to TA2 TAC3 corresponding to TA3, and TAC4 corresponding to TA4.
  • the broadcast messages sent in one cycle carry TAC1 and TAC2
  • the broadcast messages sent in the next period carry TAC3 and TAC4
  • the broadcast messages sent in the next period carry TAC1 and TAC2
  • TAC1 and TAC2 carried in the periodic broadcast message may be replaced with TAC1 and TAC3, etc., the embodiment of the present application is not limited to this).
  • the terminal device when a broadcast message carries a TAC, the terminal device needs to wait for the broadcast message after reception, and decide whether to initiate the TA update process according to the TAC in the subsequent broadcast message. In this case, the terminal device needs to wait for the terminal device to judge for multiple cycles to determine whether the TA update process needs to be initiated.
  • the waiting time may be longer.
  • the determination time of the terminal device can be reduced. That is, the waiting time for the terminal device to determine whether to initiate the TA update process is shortened.
  • the TAC field in the satellite communication broadcast signal can be expanded. Assuming that the original TAC field contains y bits of information, the expanded TAC field contains Ny bits of information. Each y bit of information can correspond to the same TAC or multiple different TAC.
  • the satellite beam may not broadcast TAC periodically, but broadcast multiple TACs at a time.
  • the satellite device may also periodically broadcast the TAC alternately, and broadcast broadcast messages in a multi-TAC manner at a time, which can reduce user waiting time.
  • the satellite device may periodically send broadcast messages in various ways.
  • the satellite device periodically sends broadcast messages according to the first correspondence between the periodic information of the broadcast message and the TAC.
  • the first correspondence may be pre-stored in the satellite device, or the first correspondence may be notified by the core network device.
  • the following takes a broadcast message carrying a TAC as an example to describe the specific form of the broadcast message sent by the satellite device according to the situation, and describe the method for the terminal device to specifically update the TA for each situation. It should be understood that a broadcast message carries multiple TAC. Referring to an example in which one broadcast message carries one TAC, as long as one TAC carried in one broadcast message is replaced with multiple TACs, in order to avoid repetition, the case where one broadcast message carries multiple TACs is no longer described.
  • the cycle information includes the serial number of each cycle,
  • the first correspondence includes each cycle sequence number of periodically sending broadcast messages and a TAC corresponding to each cycle sequence number.
  • the satellite device periodically sends broadcast messages according to each periodic sequence number of the periodic broadcast message and the TAC corresponding to each periodic sequence number.
  • the satellite beam periodically broadcasts multiple TACs when covering part of the multiple TAs.
  • TAC TAC
  • TAC1 TAC
  • the beam covers both TA1 and TA2, then At this time, multiple TAs (for example, TA1, TA2) are assigned to the beam and the TACs of TA1 and TA2 (that is, TAC1, TAC2) are periodically broadcast alternately.
  • TAC TAC2
  • the above corresponding relationship is shown in Table 1.
  • the table can be known by the satellite as part of the ephemeris information, or the satellite network can be notified by the core network.
  • the satellite device can determine the TAC carried in the broadcast message according to the correspondence shown in Table 1, and send each broadcast message.
  • the sending time of each period may be specified in the ephemeris information, or may be indicated by the core network device to the satellite device, and the period interval of each adjacent two broadcast messages may be the same.
  • the embodiment is not limited to this.
  • the satellite beam when the satellite beam periodically broadcasts TAC of TA1 and TA2, whether it is paging the terminal device in TA1 or the terminal device in TA2, it can be realized on the beam Paging terminal equipment.
  • the satellite beam coverage area belongs to TA1.
  • the broadcast messages of these periods carry a TAC, namely TAC1; from the mth period to the nth period, the satellite beam coverage area belongs to TA1 and At TA2, these periodic broadcast messages alternately carry TAC1 and TAC2; from the nth period, the satellite beam coverage area belongs to TA2, and these periodic broadcast messages carry one TAC, namely TAC2.
  • the following describes a method in which a terminal device specifically updates TA.
  • the terminal device detects that the TA corresponding to the TAC in the subsequent broadcast message does not belong to the first TA list and does not belong to the second TA list, the TA is recorded in the second TA list; or, Clear the second TA list when at least one TA belonging to the first TA list exists in the TA corresponding to the TAC in the broadcast message after the terminal device checks; or, after the terminal device checks When the TA corresponding to the TAC in the broadcast message does not belong to the first TA list and belongs to the second list, the terminal device sends a TA update process to update the first TA list.
  • the "TAC waiting and listening state" and “TA monitoring list” (ie, the second TA list) of the terminal device may be set, and the terminal device detects that the TA corresponding to the TAC does not belong to the first TA In the list, the terminal device enters the TAC waiting and listening state, records the TA in the second TA list, does not update the TA, waits and listens to the subsequent broadcast message, and judges whether it is needed according to the TAC in the subsequent broadcast message Initiate TA update.
  • the terminal device calculates the TAI using the currently monitored TAC and records it to the TA monitoring list (that is, the second TA list), and waits for the next cycle of TAC.
  • the "TA monitoring list” may be a list in which a terminal device records TA information monitored by the terminal device in a TAC waiting and monitoring state.
  • the terminal device monitors the TAC broadcast by the satellite beam, calculates the TAI, and judges whether it belongs to its own TA list (ie, the first TA list). If it is, it detects the broadcast message of the next cycle and repeats 510, otherwise step 520.
  • the terminal device enters the TAC waiting and listening state, calculates the TAI using the currently monitored TAC, and records it to the TA monitoring list (that is, the second TA list), and waits for the TAC of satellite broadcasting in the next cycle.
  • step 530 Calculate TAI and determine whether it belongs to its own TA list. If it is, exit the TAC waiting and monitoring state, clear the TA monitoring list and return to step 510. If not, go to step 540.
  • step 540 Determine whether it belongs to the TA monitoring list. If it belongs to the TA monitoring list, it indicates that a TAC alternate broadcast cycle has been monitored, and no TAC corresponding to the TA in its own TA list has been monitored in the cycle. After that, step 550 is executed, otherwise it returns to execution Step 520.
  • the cycle information includes the start time of each cycle,
  • the first correspondence includes the start time of each cycle of periodically sending broadcast messages and the TAC corresponding to the start time of each cycle.
  • the satellite device periodically sends broadcast messages according to the start time of each period in which broadcast messages are periodically sent and the TAC corresponding to the start time of each period.
  • Table 2 the above corresponding relationship is shown in Table 2.
  • the table can be known by the satellite as part of the ephemeris information, or the satellite device can be notified by the network.
  • the satellite device may determine the TAC carried in the broadcast message according to the correspondence shown in Table 2, and send each broadcast message.
  • the sending time of each period may be specified in the ephemeris information, or may be indicated by the core network device to the satellite device, and the period interval of each adjacent two broadcast messages may be the same.
  • the embodiment is not limited to times.
  • Table 2 is that Table 1 is the correspondence between the serial number of each cycle and TAC, and Table 2 is the correspondence between the start of each cycle and TAC,
  • Table 2 only shows an example where t i is the start time of the cycle, but the embodiment of the present application is not limited to this.
  • t i in Table 2 may be replaced with the end time of the cycle and the middle time of the cycle. Wait for time information.
  • the method for the terminal device to specifically update the TA may refer to the method shown in FIG. 5 in the above case. To avoid repetition, no further description is provided here.
  • the satellite device may also use other methods to send the broadcast message.
  • the following is a detailed description in conjunction with case three.
  • the cycle information includes the start time of the cycle, and the first relationship includes each TAC and its corresponding cycle start time;
  • the period information includes the start sequence number of the period, and the first relationship includes the start sequence number of each TAC and its corresponding period;
  • the cycle information includes a cycle termination time, and the first relationship includes each TAC and its corresponding cycle termination time;
  • the cycle information includes a cycle termination sequence number, and the first relationship includes each TAC and its corresponding cycle termination sequence number;
  • the cycle information includes a cycle time interval, and the first relationship includes each TAC and its corresponding cycle time interval;
  • the period information includes a period serial number interval, and the first relationship includes each TAC and its corresponding period serial number interval;
  • the cycle information includes the number of cycles, and the first relationship includes each TAC and its corresponding number of cycles.
  • each TAC can be replaced with “each TAC”, “each TAC” or “different TAC", that is to say, in each mode of case 3, one Corresponding to one period of information, different TACs have different values of period information.
  • the satellite device periodically sends broadcast messages according to one of the multiple forms of the first relationship described above.
  • Case 3 can be regarded as a variant of Case 1 or Case 2.
  • Satellite equipment can use different forms of tables to record the TA information broadcast by the satellite beam.
  • the satellite device specifically sends broadcast messages for each form.
  • the cycle information includes the start time of the cycle, and the first relationship includes each TAC and its corresponding cycle start time.
  • the start time of the cycle of the next TAC may be used as the end time of the cycle corresponding to the current TAC.
  • the satellite device may send a broadcast message in one or more periods between the period start time corresponding to one TAC and the period end time corresponding to the one TAC (that is, the period start time corresponding to the next TAC). Both carry this TAC.
  • the method for the terminal device to specifically update the TA may refer to the method shown in FIG. 5 in the above situation. To avoid repetition, details are not described herein again.
  • the cycle information includes the start sequence number of the cycle, and the first relationship includes the start sequence number of each TAC and its corresponding cycle;
  • the cycle start sequence number of the next TAC may be used as the cycle end sequence number corresponding to the current TAC.
  • the satellite device may send the broadcast message in one or more cycles between the cycle start sequence number corresponding to one TAC and the cycle end sequence number corresponding to the one TAC (that is, the cycle start sequence number corresponding to the next TAC). All carry the one TAC.
  • the method for the terminal device to specifically update the TA may refer to the method shown in FIG. 5 in the above situation. To avoid repetition, details are not described herein again.
  • the cycle information includes a cycle termination time, and the first relationship includes each TAC and its corresponding cycle termination time.
  • the cycle end time of the previous TAC may be used as the cycle start time of the next TAC.
  • the satellite device may send a broadcast in one or more cycles between the cycle start time corresponding to a TAC (that is, the cycle end time of the previous TAC of the TAC) and the cycle end time corresponding to the TAC.
  • a TAC that is, the cycle end time of the previous TAC of the TAC
  • Each TAC is carried in the message.
  • the method for the terminal device to specifically update the TA may refer to the method shown in FIG. 5 in the above situation. To avoid repetition, details are not described herein again.
  • the cycle information includes a cycle termination sequence number, and the first relationship includes each TAC and its corresponding cycle termination sequence number;
  • the cycle end sequence number of the previous TAC may be used as the cycle start sequence number corresponding to the next TAC.
  • the satellite device may send a broadcast in one or more cycles between the cycle start sequence number corresponding to one TAC (that is, the cycle termination sequence number of the previous TAC of the one TAC) and the cycle termination sequence number corresponding to the one TAC Each TAC is carried in the message.
  • the method for the terminal device to specifically update the TA may refer to the method shown in FIG. 5 in the above situation. To avoid repetition, details are not described herein again.
  • the cycle information includes a cycle time interval, and the first relationship includes each TAC and its corresponding cycle time interval;
  • the satellite device may carry the TAC in the broadcast message sent in one or more cycles corresponding to the cycle time interval corresponding to the TAC.
  • the method for the terminal device to specifically update the TA may refer to the method shown in FIG. 5 in the above situation. To avoid repetition, details are not described herein again.
  • the period information includes a period serial number interval, and the first relationship includes each TAC and its corresponding period serial number interval;
  • the satellite device may carry the TAC in the broadcast message sent in one or more cycles corresponding to the period sequence number interval corresponding to the TAC.
  • the method for the terminal device to specifically update the TA may refer to the method shown in FIG. 5 in the above situation. To avoid repetition, details are not described herein again.
  • the cycle information includes the number of cycles, and the first relationship includes each TAC and its corresponding number of cycles.
  • the satellite device may carry the TAC in broadcast messages sent in one or more cycles corresponding to the number of cycles corresponding to the TAC.
  • the method for the terminal device to specifically update the TA may refer to the method shown in FIG. 5 in the above situation. To avoid repetition, details are not described herein again.
  • the satellite device can determine the specific method for sending the TAC through the correspondence between the period information and the TAC. Since the correspondence includes each TAC and its corresponding period information, each period number or period corresponds to the TAC. Compared with the relationship, the amount of data is small. When the correspondence relationship exists in the ephemeris information, the data amount of the ephemeris information can be reduced. When the correspondence relationship is indicated by the core network, the signaling overhead can be reduced, saving Resources.
  • the terminal device when the terminal device detects that the TA corresponding to the TAC does not belong to the first TA list, the terminal device enters the TAC waiting and listening state. In this case, regardless of whether the terminal needs to initiate the TA update process, the terminal device must at least wait until the next cycle, and the TA message can be determined based on the broadcast message of the next cycle.
  • the broadcast message may carry first indication information, where the first indication information is used to indicate whether the broadcast message alternately carries TAC in turn.
  • TA update may be performed in the manner of FIG. 5.
  • the terminal device detects that the TA corresponding to the TAC does not belong to the first TA list, the terminal device can immediately initiate the TA update process without waiting for the next cycle.
  • the terminal device can determine whether the beam is at the stage of periodically broadcasting the TAC periodically (that is, the stage shown in the middle diagram in FIG. 3) through the first indication information. For the first indication information indicating that the broadcast message does not carry TAC alternately in sequence, the terminal device can immediately execute the TA update process after listening to the change of TAC, without waiting for the TAC of the next periodic beam broadcast, thereby saving waiting time and updating more timely TA list.
  • the first indication information is multiplexing one or more bits in the TAC field.
  • any bit can be used, for example, the first bit is used as the first indication information, and the bit is 1 ( Or 0) indicates that the beam is in the stage of periodically alternating broadcast of TAC, and 0 (or 1) indicates that the beam broadcasts only one TAC.
  • the first indication information is one or more newly added bits in the TAC field.
  • the first indication information is not limited to one bit.
  • the first indication information may be multiple bits, and the first indication information may also indicate the duration or number of cycles of the broadcast message carrying the same TAC. .
  • the terminal device monitors the TAC broadcast by the satellite beam, calculates the TAI, and determines whether it belongs to its own TA list (that is, the first TA list). If it is, it detects the broadcast message of the next period and repeats 810, otherwise step 820 is performed.
  • the terminal device judges whether the first indication information indicates that the satellite beam is in the stage of periodically alternating broadcast of TAC, and if so, proceeds to step 830, otherwise proceeds to step 860.
  • the terminal device enters the TAC waiting and listening state, calculates the TAI using the currently monitored TAC, and records it to the TA monitoring list (that is, the second TA list), and waits for the TAC of satellite broadcasting in the next cycle.
  • step 840 Calculate TAI and determine whether it belongs to its own TA list. If it is, exit the TAC waiting and monitoring state, clear the TA monitoring list and return to step 810. If not, go to step 850.
  • step 860 Determine whether it belongs to the TA monitoring list. If it belongs to the TA monitoring list, it indicates that a TAC alternate broadcast cycle has been monitored, and no TAC corresponding to the TA in its own TA list has been monitored in the cycle. After that, step 860 is executed, otherwise it returns to execution Step 830.
  • the terminal device can determine whether the beam is in the stage of periodically alternating broadcast of TAC through the indication information.
  • the first indication information indicates that the broadcast message does not carry TAC alternately in sequence.
  • the first indication information is At 0, the terminal device can immediately execute the TA update process after listening to the change of TAC, without waiting for the TAC of the next periodic beam broadcast, thereby saving the waiting time and updating the TA list in a more timely manner.
  • the embodiment of the present application may carry second indication information in the broadcast message, where the second indication information is used to indicate at least one of the following information:
  • the number of consecutive broadcasts of the same TAC the number of consecutive broadcast cycles of the same TAC, the continuous broadcast time of the same TAC, and the number of alternately broadcast TACs.
  • the second indication information is multiplexing one or more bits in the TAC field, or the second indication information is one or more newly added bits in the TAC field.
  • the second indication information does not indicate whether the satellite is periodically broadcast alternately The phase of TAC, but can indicate the number of consecutive broadcasts of the same TAC, the number of cycles, the time, the number of alternately broadcast TACs, etc.
  • the terminal device can no longer continuously monitor the TAC broadcast by the satellite beam according to the second indication information, but can choose to continue to monitor the broadcast message after a certain number of cycles and a period of time. In this way, there is no need for the terminal device to continuously monitor the broadcast message, which can save resources and reduce the computing overhead of the terminal device.
  • the terminal device can determine that TAC2 corresponds to 4 cycles according to the second indication information, that is, the terminal device can know that the satellite beam has sent 4 cycles of TAC1, 1 cycle of TAC2, and 1 cycle of TAC1 , TAC2 will be sent continuously, that is, the terminal device knows that after detecting the last cycle of TAC1, it will continuously send 4 cycles of TAC2. Therefore, after detecting the last cycle of TAC1, the terminal device does not You need to wait another cycle to see if TAC1 is sent in the next cycle, thus saving waiting time.
  • the terminal device can know that the TAC broadcasted in the next cycle is TAC2 or TAC3 instead of TAC1. Only TAC1 is included in a list, so that the terminal device can determine that the TAC carried in the broadcast message in the next cycle is different from TAC1 without monitoring the broadcast message in the next cycle, which can save waiting time.
  • the second indication information is used to implicitly or display the number of cycles of the same TAC broadcast, and then the terminal device can follow the indication of the second indication information without continuous monitoring of the broadcast message by the terminal device, which can save resources and reduce the terminal The computing cost of the device.
  • the terminal device may also monitor or recalculate the TAC after several cycles, Thereby saving computing resources.
  • the method for the terminal device to specifically update the TA may refer to the method shown in FIG. 5 in the above case. To avoid repetition, details are not described herein again.
  • the method for the terminal device to specifically update the TA may refer to the update method in FIG. 5 above, the difference is that in the method in FIG. 5, the terminal device needs to continuously monitor the broadcast of each period Message, when there is second indication information, the terminal device may skip some periodic broadcast messages as described above, that is, there is no need to continuously monitor the broadcast messages, and to avoid repetition, they will not be repeated here.
  • FIG. 1 to FIG. 8 are only for helping those skilled in the art to understand the embodiments of the present application, and are not intended to limit the embodiments of the present application to the specific numerical values or specific scenarios illustrated. Those skilled in the art can obviously make various equivalent modifications or changes according to the examples shown in FIGS. 1 to 8, and such modifications or changes also fall within the scope of the embodiments of the present application.
  • the communication device 900 may include: a processing unit 910 and a transceiver unit 920;
  • the communication device 900 can be configured for various processes and steps corresponding to the terminal device in the implementation of the foregoing methods.
  • the transceiver unit is used to receive a broadcast message periodically sent by a satellite device, where the broadcast message alternately carries a tracking area code TAC corresponding to one or more TAs in at least two tracking areas TA.
  • the coverage area of the beam belongs to the at least two TAs;
  • the processing unit is used for:
  • the TA is recorded in the second TA list, where the first TA list includes One or more TAs of the communication device, the second TA list is used to store detected TAs different from the first TA list;
  • multiple TACs are assigned to a satellite beam that simultaneously covers multiple TAs, and a method of periodically broadcasting multiple TACs or broadcasting multiple TACs at once may be adopted.
  • the terminal device detects that the satellite beam TAC has changed, it may not immediately perform TA update, but confirm that there is no TAC of the TA to which it belongs in an alternate broadcast period, and then perform TA update, thereby avoiding the "TAC hard handover"
  • Some terminal equipment may incur signaling overhead caused by unnecessary TA updates.
  • the embodiment of the present application does not need to allocate a larger TA list, thereby saving paging resources.
  • processing unit is specifically used to:
  • the terminal device When it is checked that the TA corresponding to the TAC in the broadcast message does not belong to the first TA list and belongs to the second list, the terminal device initiates a TA update process to update the first TA list while Clear the second TA list.
  • the first TA list is obtained by the communication device through high-level signaling.
  • a broadcast message sent in one cycle carries a TAC
  • a broadcast message sent in one cycle carries multiple TACs.
  • the broadcast message carries first indication information, and the first indication information indicates whether the broadcast message carries TAC alternately in sequence.
  • the first indication information is multiplexing one or more bits in the TAC field, or the first indication information is one or more newly added bits in the TAC field.
  • the broadcast message carries second indication information, and the second indication information is used to indicate at least one of the following information:
  • the number of consecutive broadcasts of the same TAC the number of consecutive broadcast cycles of the same TAC, the continuous broadcast time of the same TAC, and the number of alternately broadcast TACs.
  • the second indication information is multiplexing one or more bits in the TAC field, or the second indication information is one or more newly added bits in the TAC field.
  • apparatus 900 has any function of the terminal device in the embodiment of the method shown in the above figure, and details are not repeated here.
  • unit in the embodiments of the present application may refer to an application specific integrated circuit (application specific integrated circuit, ASIC), an electronic circuit, a processor (such as a shared processor) for executing one or more software or firmware programs , Proprietary processors or group processors, etc.) and memory, merged logic circuits and/or other suitable components that support the described functions.
  • ASIC application specific integrated circuit
  • processor such as a shared processor
  • memory merged logic circuits and/or other suitable components that support the described functions.
  • the apparatus 900 provided by the present application corresponds to the process performed by the terminal device in the foregoing method embodiment, and the functions of each unit/module in the apparatus can be referred to the description above, and are not repeated here.
  • the apparatus shown in FIG. 9 may be a terminal device, or may be a chip or an integrated circuit installed in the terminal device.
  • FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • the terminal device 1000 may be applied to the system shown in FIG. 1.
  • the terminal device 1000 may include a processor 1010 and a transceiver 1020.
  • the processor 1010 is connected to the transceiver 1020.
  • the terminal device 1000 further includes a memory 1030, and the memory 1030 is connected to the processor 1010.
  • the access point 1000 may also include a bus system 1040.
  • the processor 1010, the memory 1030, and the transceiver 1020 may be connected through a bus system 1040, the memory 1030 may be used to store instructions, the processor 1010 may correspond to the processing unit 910, and the transceiver 1020 may correspond to the transceiver unit 920.
  • the process 1010 is used to execute instructions to control the transceiver 1020 to send and receive information or signals, and the memory 1030 stores the instructions.
  • the processor may be a central processing unit (Central Processing Unit, referred to as "CPU"), and the processor may also be other general-purpose processors, digital signal processors (DSPs), and application-specific integrated circuits (ASIC), ready-made programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc.
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory may include read-only memory and random access memory, and provide instructions and data to the processor.
  • a portion of the memory may also include non-volatile random access memory.
  • the memory may also store device type information.
  • the bus system may also include a power bus, a control bus, and a status signal bus.
  • a power bus may also include a power bus, a control bus, and a status signal bus.
  • various buses are marked as bus systems in the figure.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware processor, or may be executed and completed by a combination of hardware and software modules in the processor.
  • the software module may be located in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, and registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. In order to avoid repetition, they will not be described in detail here.
  • the terminal device 1000 shown in FIG. 10 can implement various processes involving the terminal device in the foregoing method embodiments.
  • the operations and/or functions of each module in the terminal device 1000 are respectively for implementing the corresponding processes in the above method embodiments.
  • FIG. 11 is a schematic structural diagram of a data transmission communication device according to an embodiment of the present application.
  • the communication device 1100 may include:
  • Processing unit 1110 and transceiver unit 1120 are identical to Processing unit 1110 and transceiver unit 1120.
  • the processing unit is used to determine that the coverage area of the beam belongs to at least two tracking areas TA;
  • the transceiver unit is used to periodically send a broadcast message through the beam, and the broadcast message alternately carries a tracking area code TAC corresponding to one or more of the at least two TAs.
  • multiple TACs are assigned to a satellite beam that simultaneously covers multiple TAs, and a method of periodically broadcasting multiple TACs or broadcasting multiple TACs at once may be adopted.
  • the terminal device detects that the satellite beam TAC has changed, it may not immediately perform TA update, but confirm that there is no TAC of the TA to which it belongs in an alternate broadcast period, and then perform TA update, thereby avoiding the "TAC hard handover"
  • Some terminal equipment may incur signaling overhead caused by unnecessary TA updates.
  • the embodiment of the present application does not need to allocate a larger TA list, thereby saving paging resources.
  • the transceiver unit is specifically used to:
  • the first correspondence relationship is pre-stored in the communication device, or the first correspondence relationship is notified by the core network device.
  • the cycle information includes the serial number of each cycle
  • the first correspondence includes each cycle sequence number of periodically sending broadcast messages and a TAC corresponding to each cycle sequence number.
  • the period information includes the starting moment of each period
  • the first correspondence includes the start time of each cycle of periodically sending broadcast messages and the TAC corresponding to the start time of each cycle.
  • the cycle information includes the start time of the cycle, and the first relationship includes each TAC and its corresponding cycle start time;
  • the period information includes the starting sequence number of the period, and the first relationship includes the starting sequence number of each TAC and its corresponding period;
  • the cycle information includes a cycle termination time, and the first relationship includes each TAC and its corresponding cycle termination time;
  • the cycle information includes a cycle termination sequence number, and the first relationship includes each TAC and its corresponding cycle termination sequence number;
  • the cycle information includes a cycle time interval, and the first relationship includes each TAC and its corresponding cycle time interval;
  • the period information includes a period sequence number interval, and the first relationship includes each TAC and its corresponding period sequence number interval;
  • the period information includes the number of periods, and the first relationship includes each TAC and its corresponding number of periods.
  • a broadcast message sent in one cycle carries a TAC
  • a broadcast message sent in one cycle carries multiple TACs.
  • the broadcast message carries first indication information, and the first indication information is used to indicate whether the broadcast message carries TAC alternately in sequence.
  • the first indication information is multiplexing one or more bits in the TAC field, or the first indication information is one or more newly added bits in the TAC field.
  • the broadcast message carries second indication information, and the second indication information is used to indicate at least one of the following information:
  • the number of consecutive broadcasts of the same TAC the number of consecutive broadcast cycles of the same TAC, the continuous broadcast time of the same TAC, and the number of alternately broadcast TACs.
  • the second indication information is multiplexing one or more bits in the TAC field, or the second indication information is one or more newly added bits in the TAC field.
  • the apparatus 1100 has any function of the satellite device in the foregoing method embodiment, and details are not repeated here.
  • the apparatus shown in FIG. 11 may be satellite equipment, or may be a chip or an integrated circuit installed in the satellite equipment.
  • FIG. 12 is a schematic structural diagram of a satellite device according to an embodiment of the present application.
  • the satellite device 1200 can be applied to the system shown in FIG. 1.
  • the satellite device 1200 may include a processor 1210 and a transceiver 1220.
  • the processor 1210 is connected to the transceiver 1220.
  • the initiating device 1200 further includes a memory 1230.
  • the memory 1230 is connected to the processor 1210.
  • the initiating device 1200 may also include a bus system 1240.
  • the processor 1210, the memory 1230 and the transceiver 1220 may be connected through a bus system 1240, the memory 1230 may be used to store instructions, the processor 1210 may correspond to the processing unit 1110, and the transceiver 1220 may correspond to the transceiver unit 1120.
  • the process 1210 is used to execute instructions to control the transceiver 1220 to send and receive information or signals, and the memory 1230 is used to store instructions.
  • the satellite device 1200 shown in FIG. 12 can implement various processes related to the satellite device in the foregoing legal embodiment.
  • the operations and/or functions of each module in the satellite device 1200 are respectively for implementing the corresponding processes in the above method embodiments.
  • An embodiment of the present application further provides a processing device, including a processor and an interface; the processor is used to execute the communication method in any of the foregoing method embodiments.
  • the above processing device may be a chip.
  • the processing device may be a field-programmable gate array (FPGA), may be an application-specific integrated circuit (ASIC), or may be a system chip (system on chip, SoC), or It can be a central processor (CPU), a network processor (NP), a digital signal processor (DSP), or a microcontroller unit, MCU), can also be a programmable controller (programmable logic device, PLD) or other integrated chips.
  • FPGA field-programmable gate array
  • ASIC application-specific integrated circuit
  • SoC system on chip
  • CPU central processor
  • NP network processor
  • DSP digital signal processor
  • MCU microcontroller unit
  • PLD programmable controller
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor or instructions in the form of software.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware processor, or may be executed and completed by a combination of hardware and software modules in the processor.
  • the software module may be located in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, and registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. In order to avoid repetition, they will not be described in detail here.
  • the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capabilities.
  • each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the aforementioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an existing programmable gate array (FPGA), or other available Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA existing programmable gate array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application may be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware decoding processor, or may be executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a mature storage medium in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, and registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • processor may be implemented by hardware or software.
  • the processor may be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor may be a general-purpose process It is realized by reading the software code stored in the memory.
  • the memory can be integrated in the processor, can be located outside the processor, and exists independently.
  • the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electronically Erasable programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (random access memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • synchronous RAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • double data SDRAM double data SDRAM
  • DDR SDRAM enhanced synchronous dynamic random access memory
  • ESDRAM synchronous connection dynamic random access memory
  • direct RAMbus RAM direct RAMbus RAM
  • An embodiment of the present application further provides a communication system, which includes the foregoing satellite device and terminal device, and optionally, may also include a core network device.
  • An embodiment of the present application further provides a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, the method in any of the foregoing method embodiments is implemented.
  • An embodiment of the present application also provides a computer program product that implements the method in any of the above method embodiments when the computer program product is executed by a computer.
  • the computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (DVD)), or a semiconductor medium (for example, a solid state disk, SSD)) etc.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a high-density digital video disc (DVD)
  • DVD high-density digital video disc
  • SSD solid state disk
  • the network device in each of the above device embodiments corresponds exactly to the network device or terminal device in the terminal device and method embodiments, and the corresponding steps are performed by the corresponding modules or units, for example, the sending module (transmitter) method performs the sending in the method embodiment , The receiving module (receiver) performs the steps received in the method embodiment, and other steps than sending and receiving may be performed by the processing module (processor).
  • the function of the specific module can refer to the corresponding method embodiment.
  • the sending module and the receiving module may form a transceiver module, and the transmitter and the receiver may form a transceiver to jointly realize the sending and receiving function; the processor may be one or more.
  • At least one refers to one or more, and “multiple” refers to two or more.
  • “And/or” describes the relationship of the related objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the related object is a “or” relationship.
  • “At least one of the following” or a similar expression refers to any combination of these items, including any combination of a single item or a plurality of items.
  • At least one item (a) in a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be a single or multiple .
  • a component may be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and/or a computer.
  • the application running on the computing device and the computing device can be components.
  • One or more components can reside in a process and/or thread of execution, and a component can be localized on one computer and/or distributed between 2 or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • the component may, for example, be based on a signal having one or more data packets (eg, data from two components that interact with another component between the local system, the distributed system, and/or the network, such as the Internet that interacts with other systems through signals) Communicate through local and/or remote processes.
  • data packets eg, data from two components that interact with another component between the local system, the distributed system, and/or the network, such as the Internet that interacts with other systems through signals
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a division of logical functions.
  • there may be other divisions for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the computer program product includes one or more computer instructions (programs).
  • programs When the computer program instructions (programs) are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated.
  • the computer may be a general-purpose computer, a dedicated computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be from a website site, computer, server or data center Transmit to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device including a server, a data center, and the like integrated with one or more available media.
  • the usable medium may be a magnetic medium (eg, floppy disk, hard disk, magnetic tape), optical medium (eg, DVD), or semiconductor medium (eg, solid state disk (SSD)), or the like.

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Abstract

本申请提供了一种跟踪区更新的方法、传输广播消息的方法和通信装置，该方法包括终端设备接收卫星设备周期性发送的广播消息，该广播消息交替携带至少两个跟踪区TA中的一个或多个TA对应的跟踪区域码TAC，该卫星设备的波束的覆盖区域属于该至少两个TA；该终端设备在首次检测到当前周期接收的广播消息中的TAC对应的TA不属于第一TA列表时，将该TA记录在第二TA列表中，该终端设备继续检测之后的广播消息，并根据之后的广播消息中的TAC确定是否发起TA更新流程。本申请实施例能够减小信令开销，节省寻呼资源。

Description

跟踪区更新的方法、传输广播消息的方法和通信装置
本申请要求于2018年11月28日提交中国专利局、申请号为201811436020.8、申请名称为“跟踪区更新的方法、传输广播消息的方法和通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，特别涉及一种跟踪区更新的方法、传输广播消息的方法和通信装置。
背景技术
卫星通信具有覆盖范围广、通信距离远、可靠性高、灵活性大、吞吐高等优点，不受地理环境、气候条件和自然灾害的影响，已经被广泛应用于航空通信、海事通信、军事通信等领域。将卫星引入到未来第五代移动网络(5th-generation，5G)中，可为地面网络难以覆盖的区域，如海洋、森林等提供通信服务，可以增强5G通信的可靠性，如为火车、飞机以及这些交通工具上的用户提供更稳定更优质的通信服务，还可以提供更多的数据传输资源，支持更多数量的连接。
然而，现有卫星通信系统中的跟踪区(tracking area，TA)更新信令开销较大，如何降低TA更新的信令开销成为亟待解决的技术问题。
发明内容
本申请提供一种跟踪区更新的方法、传输广播消息的方法和通信装置，能够降低信令开销。
第一方面，提供了一种跟踪区TA更新的方法，该方法包括：
终端设备接收卫星设备周期性发送的广播消息，所述广播消息交替携带至少两个跟踪区TA中的一个或多个TA对应的跟踪区域码TAC，所述卫星设备的波束的覆盖区域属于所述至少两个TA；
所述终端设备在首次检测到当前周期接收的广播消息中的TAC对应的TA不属于第一TA列表时，将所述TA记录在第二TA列表中，其中，所述第一TA列表包括用于寻呼所述终端设备的一个或多个TA，所述第二TA列表用于存储检测到的不同于第一TA列表的TA；
所述终端设备继续检测之后的广播消息，并根据之后的广播消息中的TAC确定是否发起TA更新流程。
也就是说，终端设备在首次检测到当前周期接收的广播消息中的TAC对应的TA不属于第一TA列表时，不立刻发起TA更新流程，根据之后的广播消息中的TAC确定是否发起TA更新流程。因此，本申请实施能够避免在现有方式中一旦检测到TA不属于TA 列表时直接发起TA更新流程可能导致不必要信令开销的问题。
本申请实施例中给一个同时覆盖到多个TA的卫星波束分配多个TAC，可以采用周期性交替广播多个TAC或一次性广播多个TAC的方式。终端设备在监听到卫星波束TAC发生变化时，可不立即执行TA更新，而是确认一个交替广播周期内没有自身所属TA的TAC后，再执行TA更新，从而避免由于“TAC硬切换”所造成的部分终端设备可能发生不必要TA更新所带来的信令开销。同时，如果该终端设备为固定终端设备或移动范围有限，本申请实施例不需要分配更大的TA列表，从而节省寻呼资源。
应理解，本申请实施例中，该第一TA列表可以是网络侧(例如，核心网侧或者卫星设备侧)维护的，终端设备需要从网络侧获取或更新该第一TA列表，例如，所述第一TA列表是所述终端设备通过高层信令获取的。该第二TA列表是终端设备维护的，该第二TA列表是终端设备自身确定的。
例如，该第一TA列表是该终端设备从卫星设备获取的，具体地，核心网设备可以确定该第一TA列表，并通过卫星设备将该第一TA列表发送至终端设备。核心网设备可以通过第一TA列表寻呼终端设备，核心网设备对终端设备寻呼时，需要在该第一TA列表上所有的TA的波束(即覆盖该第一TA列表中TA的波束)上寻呼终端设备。
结合第一方面，在第一方面一种实现方式中，所述终端设备继续检测之后的广播消息，并根据之后的广播消息中的TAC确定是否发起TA更新流程，包括：
所述终端设备在检测到之后的广播消息中的TAC对应的TA不属于第一TA列表且不属于第二TA列表时，将所述TA记录在第二TA列表中；
或者，
在所述终端设备检查到之后的广播消息中的TAC对应的TA存在有至少一个TA属于所述第一TA列表时，清空所述第二TA列表；
或者，
在所述终端设备检查到之后的广播消息中的TAC对应的TA不属于所述第一TA列表，且属于所述第二列表时，所述终端设备发起TA更新流程，以更新所述第一TA列表，同时清空所述第二TA列表。
也就是说，所述终端设备在检测到之后的广播消息中的TAC对应的TA不属于第一TA列表且不属于第二TA列表时，不发起TA更新流程；在所述终端设备检查到之后的广播消息中的TAC对应的TA存在有至少一个TA属于所述第一TA列表时，不发起TA更新流程；只有在所述终端设备检查到之后的广播消息中的TAC对应的TA不属于所述第一TA列表，且属于所述第二列表时，所述终端设备才发起TA更新流程，以更新所述第一TA列表。
例如，TA更新流程可以是终端设备通过卫星设备向核心网设备发送请求以获取更新后的TA列表，具体地TA更新流程可以参考现有标准中的描述，此处不再赘述。
结合第一方面，在第一方面一种实现方式中，一个周期发送的广播消息中携带一个TAC；
或者，
一个周期发送的广播消息中携带多个TAC。
应理解，在一个广播消息携带一个TAC时，终端设备需要等待接收之后的广播消息， 并根据之后的广播消息中的TAC决定是否需要发起TA更新流程。这种情况下，终端设备需要等待终端设备判断多个周期才能确定是否需要发起TA更新流程，等待时间可能较长，在当一个广播消息携带多个TAC时，可以减小终端设备的确定时间，即缩短终端设备确定是否发起TA更新流程的等待时间。
具体地，本实施例可以对卫星通信广播信号中的TAC字段进行扩展，假设原TAC字段包含y个比特信息，则扩展后的TAC字段包含Ny个比特信息，每y个比特信息可以对应一个相同的TAC或多个不同的TAC。卫星波束可以不采用周期性交替广播TAC的方式，而采用一次性广播多TAC的方式。或者，卫星设备也可以采用周期性交替广播TAC，且一次性广播多TAC的方式的发送广播消息，这种方式能够减少用户等待时间。
结合第一方面，在第一方面一种实现方式中，所述广播消息携带第一指示信息，所述第一指示信息指示广播消息是否依次交替携带TAC。
结合第一方面，在第一方面一种实现方式中，所述第一指示信息为复用TAC字段中的一个或多个比特，或者所述第一指示信息为TAC字段中新增加的一个或多个比特。
通过增加第一指示信息，终端设备可以通过第一指示信息判断该波束是否处于周期性交替广播TAC的阶段。对于第一指示信息指示广播消息不是依次交替携带TAC，终端设备监听到TAC的变化后可立即执行TA更新流程，而不需要等待下一个周期波束广播的TAC，从而节省等待时间，更加及时地更新TA列表。
结合第一方面，在第一方面一种实现方式中，所述广播消息携带第二指示信息，所述第二指示信息用于指示以下信息中的至少一种：
同一个TAC连续广播次数，同一个TAC连续广播周期数，同一个TAC连续广播时间，以及交替广播的TAC的个数。
结合第一方面，在第一方面一种实现方式中，所述第二指示信息为复用TAC字段中的一个或多个比特，或者所述第二指示信息为TAC字段中新增加的一个或多个比特。
本申请实施例中，终端设备可以根据第二指示信息，不再连续监听卫星波束广播的TAC，而是可以选择间隔一定的周期数、一段时间再继续监听广播消息。因此，本申请实施例，能够节省资源，降低终端设备的计算开销。
第二方面，提供了一种传输广播信号的方法，该方法包括：
卫星设备确定波束的覆盖区域属于至少两个跟踪区TA；
所述卫星设备通过所述波束周期性发送广播消息，所述广播消息交替携带所述至少两个TA中的一个或多个TA对应的跟踪区域码TAC。
例如，该卫星设备可以根据星历信息确定波束的覆盖区域属于至少两个跟踪区TA，或者该卫星设备根据核心网络设备指示确定波束的覆盖区域属于至少两个跟踪区TA。
应理解，该星历信息可以是卫星设备本地存储的信息，该星历信息可以包括卫星设备的波束信息(例如，波束的覆盖区域等信息)、运动轨迹等信息，本申请实施例并不限于此。
本申请实施例中给一个同时覆盖到多个TA的卫星波束分配多个TAC，可以采用周期性交替广播多个TAC或一次性广播多个TAC的方式。终端设备在监听到卫星波束TAC发生变化时，可不立即执行TA更新，而是确认一个交替广播周期内没有自身所属TA的TAC后，再执行TA更新，从而避免由于“TAC硬切换”所造成的部分终端设备可能发生 不必要TA更新所带来的信令开销。同时，如果该终端设备为固定终端设备或移动范围有限，本申请实施例不需要分配更大的TA列表，从而节省寻呼资源。
应理解，第二方面卫星设备执行的方法与终端设备执行的第一方面的方法对应，第二方面的一些方案以及达到的效果可以参考第一方面的描述，为避免重复，此处适当省略详细描述。
结合第二方面，在第二方面一种实现方式中，所述卫星设备周期性发送广播消息，包括：
所述卫星设备根据广播消息的周期信息与TAC的第一对应关系周期性发送广播消息；
其中，所述第一对应关系预存在所述卫星设备中，或者，所述第一对应关系是由核心网设备通知的。
结合第二方面，在第二方面一种实现方式中，所述周期信息包括各个周期的序号，
所述第一对应关系包括周期性发送广播消息的各个周期序号以及与所述各个周期序号一一对应的TAC。
结合第二方面，在第二方面一种实现方式中，所述周期信息包括各个周期的起始时刻，
所述第一对应关系包括周期性发送广播消息的各个周期的起始时刻以及与所述各个周期起始时刻一一对应的TAC。
结合第二方面，在第二方面一种实现方式中，所述周期信息包括周期的起始时刻，所述第一关系包括各个TAC及其对应的周期起始时刻；
具体而言，卫星设备可以在一个TAC对应的周期起始时刻到该一个TAC对应的周期结束时刻(即下一TAC对应的周期起始时刻)，之间的一个或多个周期发送的广播消息中均携带该一个TAC。
或者，所述周期信息包括周期的起始序号，所述第一关系包括各个TAC及其对应的周期的起始序号；
具体而言，卫星设备可以在一个TAC对应的周期起始序号到该一个TAC对应的周期结束序号(即下一TAC对应的周期起始序号)之间的一个或多个周期发送的广播消息中均携带该一个TAC。
或者，所述周期信息包括周期的终止时刻，所述第一关系包括各个TAC及其对应的周期终止时刻；
具体而言，卫星设备可以在一个TAC对应的周期起始时刻(即该一个TAC的前一个TAC的周期终止时刻)到该一个TAC对应的周期终止时刻之间的一个或多个周期发送的广播消息中均携带该一个TAC。
或者，所述周期信息包括周期的终止序号，所述第一关系包括各个TAC及其对应的周期终止序号；
具体而言，卫星设备可以在一个TAC对应的周期起始序号(即该一个TAC的前一个TAC的周期终止序号)到该一个TAC对应的周期终止序号之间的一个或多个周期发送的广播消息中均携带该一个TAC。
或者，所述周期信息包括周期时间区间，所述第一关系包括各个TAC及其对应的周期时间区间；
具体而言，卫星设备可以在一个TAC对应的周期时间区间对应的一个或多个周期发送的广播消息中均携带该一个TAC。
或者，所述周期信息包括周期序号区间，所述第一关系包括各个TAC及其对应的周期序号区间；
具体而言，卫星设备可以在一个TAC对应的周期序号区间对应的一个或多个周期发送的广播消息中均携带该一个TAC。
或者，所述周期信息包括周期个数，所述第一关系包括各个TAC及其对应的周期个数。
具体而言，卫星设备可以在一个TAC对应的周期个数对应的一个或多个周期发送的广播消息中均携带该一个TAC。
本申请实施例卫星设备通过周期信息与TAC的对应关系能够确定发送TAC的具体方式，由于该对应关系包括的是各个TAC及其对应的周期信息，与每一个周期序号或周期时间与TAC的对应关系相比，数据量较小，在该对应关系存在星历信息中的情况下，能够降低星历信息的数据量，在该对应关系是核心网指示的情况下，能够降低信令开销，节省资源。
针对同一TAC可能连续发送多个周期，针对每个TAC终端设备可以仅检测一次，能够节省计算开销。
结合第二方面，在第二方面一种实现方式中，一个周期发送的广播消息中携带一个TAC；
或者，一个周期发送的广播消息中携带多个TAC。
结合第二方面，在第二方面一种实现方式中，所述广播消息携带第一指示信息，所述第一指示信息用于指示广播消息是否依次交替携带TAC。
结合第二方面，在第二方面一种实现方式中，所述第一指示信息为复用TAC字段中的一个或多个比特，或者所述第一指示信息为TAC字段中新增加的一个或多个比特。
通过增加第一指示信息，终端设备可以通过第一指示信息判断该波束是否处于周期性交替广播TAC的阶段。对于第一指示信息指示广播消息不是依次交替携带TAC，终端设备监听到TAC的变化后可立即执行TA更新流程，而不需要等待下一个周期波束广播的TAC，从而节省等待时间，更加及时地更新TA列表。
结合第二方面，在第二方面一种实现方式中，所述广播消息携带第二指示信息，所述第二指示信息用于指示以下信息中的至少一种：
同一个TAC连续广播次数，同一个TAC连续广播周期数，同一个TAC连续广播时间，以及交替广播的TAC的个数。
结合第二方面，在第二方面一种实现方式中，所述第二指示信息为复用TAC字段中的一个或多个比特，或者所述第二指示信息为TAC字段中新增加的一个或多个比特。
本申请实施例中，终端设备可以根据第二指示信息，不再连续监听卫星波束广播的TAC，而是可以选择间隔一定的周期数、一段时间再继续监听广播消息。因此，本申请实施例，能够节省资源，降低终端设备的计算开销。
第三方面，提供了一种通信装置，包括用于执行第一方面或第一方面中任一种可能实现方式中的方法的各个模块或单元。
在一种实现方式中，该通信装置为终端设备。
第四方面，提供了一种通信装置，包括用于执行第二方面或第二方面中任一种可能实现方式中方法的各个模块或单元。
在一种实现方式中，该通信装置为卫星设备。
第五方面，提供了一种通信装置，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该网络设备执行第一方面及其可能实现方式中的方法。
在一种实现方式中，该通信装置为终端设备。
第六方面，提供了一种通信装置，包括收发器、处理器和存储器。该处理器用于控制收发器收发信号，该存储器用于存储计算机程序，该处理器用于从存储器中调用并运行该计算机程序，使得该终端设备执行第二方面及其可能实现方式中的方法。
在一种实现方式中，该通信装置为卫星设备。
第七方面，提供了一种计算机可读介质，其上存储有计算机程序，该计算机程序被计算机执行时实现第一方面及其可能实现方式中的方法。
第八方面，提供了一种计算机可读介质，其上存储有计算机程序，该计算机程序被计算机执行时实现第二方面及其可能实现方式中的方法。
第九方面，提供了一种计算机程序产品，该计算机程序产品被计算机执行时实现第一方面及其可能实现方式中的方法。
第十方面，提供了一种计算机程序产品，该计算机程序产品被计算机执行时实现第二方面及其可能实现方式中的方法。
第十一方面，提供了一种处理装置，包括处理器和接口。
第十二方面，提供了一种处理装置，包括处理器、接口和存储器。
在第十一方面或第十二方面中，该处理器，用于作为上述第一方面至第二方面或第一方面至第二方面的任一可能的实现方式中的方法的执行主体来执行这些方法，其中相关的数据交互过程(例如发送或者接收数据传输)是通过上述接口来完成的。在具体实现过程中，上述接口可以进一步通过收发器来完成上述数据交互过程。
应理解，上述十一方面或第十二方面中的处理装置可以是一个芯片，该处理器可以通过硬件来实现也可以通过软件来实现，当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件来实现时，该处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现，该存储器可以集成在处理器中，可以位于该处理器之外，独立存在。
第十三方面，提供了一种系统，包括前述的卫星设备和终端设备。
附图说明
图1是本申请实施例可应用的移动卫星通信系统场景示意图。
图2是一种TA方法示意图。
图3是根据本申请实施例中一种波束移动示意图。
图4是根据本申请一个实施例的TA更新方法交互示意图。
图5是根据本申请一个实施例的TA更新方法流程图。
图6是根据本申请一个实施例的第一指示信息示意图。
图7是根据本申请另一实施例的第一指示信息示意图。
图8是根据本申请另一实施例的TA更新方法流程图。
图9是本申请一种通信装置的示意框图。
图10是本申请一种终端设备的示意框图。
图11是本申请另一种通信装置的示意框图。
图12是本申请一种卫星设备的示意框图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
图1是本申请实施例可应用的移动卫星通信系统场景示意图。如图1所示的系统场景中包括一个或多个卫星设备、位于卫星设备的波束覆盖范围内的终端设备，以及核心网设备。
在图1所示的场景中，卫星设备可以连接到核心网设备，卫星设备可以向终端设备提供通信服务，核心网设备可以通过卫星设备寻呼终端设备，例如，核心网设备通过卫星设备可以寻呼位于卫星设备的波束覆盖范围内的终端设备。
应理解，本申请实施例中的终端设备可以为具有无线通信功能的设备，例如可以为各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备。本申请实施例中，终端设备还可以是用户单元、蜂窝电话、智能手机、无线数据卡、个人数字助理电脑、平板型电脑、无线调制解调器、手持设备、膝上型电脑、机器类型通信终、具有无线通信功能的计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、智能家居设备、无人机设备以及未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请实施例对此并不限定。
应理解，本申请实施例中，核心网设备可以为移动性管理设备，例如，核心网网元如访问和移动管理功能(access and mobility management function，AMF)网元，可以负责控制面的移动性和接入管理，如估计用户可能会被哪些卫星服务，从而设计TA列表，并将TA列表发送给用户等功能。
应理解，卫星设备根据其运行轨道高度分为高轨、中轨和低轨卫星设备。高轨卫星相对于地面静止，一个或多个高轨卫星可以为固定区域提供通信服务。非高轨卫星例如，非静止轨道(non-geostationary earth orbit，NGEO)卫星设备，包括中、低轨卫星相对于地面是高速运动的，有其各自的运动轨迹，一般需要多个卫星协作为固定区域提供通信。
本申请实施例中的卫星设备可以为上述任意一种卫星设备，例如，本申请实施例中的卫星设备可以为非静止轨道(non-geostationary earth orbit，NGEO)卫星设备。
应理解，本申请实施例中，一个卫星设备可以具有一个或多个波束，例如，一个卫星设备可以具有12个或16个波束等，本申请实施例并不对此做限定。
在图1所示的场景中，核心网通过卫星设备可以根据终端设备被分配好的跟踪区(TA)列表寻呼终端设备，具体地，终端设备本地可以保存有一个TA列表，该列表中包括一个或多个TA。应理解，该第一TA列表是由网络侧(例如，核心网设备)给终端设备分配的，当终端设备被寻呼时，核心网需要通过卫星设备在所有覆盖该TA列表中所有TA上 的卫星波束上寻呼该终端设备。
应理解，本申请实施例中，TA是为终端设备位置管理设置的概念。每个TA有其跟踪区标识(TAI)，TAI可以通过跟踪区域码(TAC)和公共陆地移动网络(public land mobile network，PLMN)标识进行计算。当终端设备接收到基站广播的TAC时，计算TAI并与核心网给自己分配的TA列表进行比对，如果发现当前卫星设备广播的TAC不在自己被分配的TA列表里，例如，由于终端设备的移动，使得终端设备所处的TA区域可能会发生变化，导致终端设备所处的TA以不存在终端设备存储的TA列表中，这种情况下，终端设备需要发起TA更新流程，由网络侧(例如核心网)重新分配TA列表给终端设备，以更新终端设备本地的TA列表。
图2是一种跟踪区更新的方法。具体地，如图2所示，首先终端设备监听卫星波束广播的TAC，然后用监听到的TAC计算TAI并与自身TA列表进行对比，若不属于自身的TA列表，则发起TA更新流程；否则，继续监听TAC。
为了使卫星通信与5G能够很好地融合，也为了减小频繁更新跟踪区(tracking area，TA)列表所带来的信令开销，现有技术中提出将卫星网络的TA与地面上固定的地理区域绑定，TA不随卫星波束移动，因此卫星覆盖区域的跟踪区域码(tracking area code，TAC)需要根据一定的规则变化。
但是，如图3所示，终端设备处于TA区域，卫星波束的覆盖范围由完全处于一个TA(如TA1)内的状态运动到完全处于另一TA(如TA2)内的状态，不是一个跳变的过程，而是一个缓变的过程。在TA切换的过渡阶段，一个卫星波束存在同时覆盖到两个或多个TA的状态，例如，如图3的中间附图，波束同时覆盖到TA1和TA2。由于现有卫星广播消息中仅能携带一个TAC，因此，现有卫星通信中需要进行“硬切换”，即在TA切换的过渡阶段在广播消息中由携带TA1对应的TAC替换为携带TA2对应的TAC，当终端设备处于TA1区域内，终端设备的TA列表中可能不存在TA2，导致终端设备需要发起TA更新流程。然而这种情况下，该终端设备仍然处于TA1的范围内，无需进行TA更新，这种方式导致不必要的信令开销。
在另一种实现方式中，网络侧设备可以给终端设备分配的TA列表为(TA1，TA2)。然而，给一个终端设备分配更大的TA列表，对该终端设备寻呼时需要在所有广播该TA列表中TA的TAC的卫星波束上进行寻呼，对于固定或运动范围较小的终端设备来说，这无疑是一种寻呼资源的浪费。
鉴于上述问题，本申请实施例提出了一种TA更新的方法，具体地，本申请实施例中给一个同时覆盖到多个TA的卫星波束分配多个TAC，可以采用周期性交替广播多个TAC或一次性广播多个TAC的方式。终端设备在监听到卫星波束TAC发生变化时，可不立即执行TA更新，而是确认一个交替广播周期内没有自身所属TA的TAC后，再执行TA更新，从而避免由于“TAC硬切换”所造成的部分终端设备可能发生不必要TA更新所带来的信令开销。同时，如果该终端设备为固定终端设备或移动范围有限，本申请实施例不需要分配更大的TA列表，从而节省寻呼资源。
以下作为示例而非限定，结合图4描述本申请实施例的TA更新的方法。
具体地，如图4所示的方法可以应用于图1所示的卫星通信系统中，具体地，如图4所示的方法包括：
410，卫星设备确定波束的覆盖区域属于至少两个跟踪区TA。
例如，该卫星设备可以根据星历信息确定波束的覆盖区域属于至少两个跟踪区TA，或者该卫星设备根据核心网络设备指示确定波束的覆盖区域属于至少两个跟踪区TA。
应理解，该星历信息可以是卫星设备本地存储的信息，该星历信息可以包括卫星设备的波束信息(例如，波束的覆盖区域等信息)、运动轨迹等信息，本申请实施例并不限于此。
420，卫星设备通过该波束周期性发送广播消息，该广播消息交替携带所述至少两个TA中的一个或多个TA对应的跟踪区域码TAC。
相对应的，终端设备接收卫星设备周期性发送的广播消息。
也就是说，卫星设备在确定波束的覆盖区域属于至少两个跟踪区TA时，该卫星设备可以依次交替携带所述至少两个TA中的一个或多个TA对应的跟踪区域码TAC的广播消息。
例如，卫星设备确定波束覆盖区域属于TA1和TA2，那么该卫星设备可以发送交替携带该TA1对应的TAC1和TA2对应的TAC2的广播消息。例如，一个周期广播携带TAC1的广播消息，下个周期广播携带TAC2的广播消息，再下个周期广播携带TAC1的广播消息，…按照此方式发送广播消息。
在例如，当卫星设备的一个波束覆盖区域属于多个TA，例如3个TA时，该卫星设备可以发送交替携带该3个TA对应的TAC，即TA1对应的TAC1、TA2对应的TAC2和TA3对应的TAC3，例如，发送的广播消息携带的TAC的顺序为TAC1、TAC2、TAC3、TAC1、TAC2、TAC3…。
应理解，上述广播消息中携带TAC的例子仅是示意性的，广播消息中每次交替携带的TAC的顺序可以不同。即每个TAC交替广播周期发送的广播消息中携带的TAC的顺序可以相同或不同。应理解，本申请实施例中“TAC交替广播周期”可以是卫星波束在覆盖到多个TA时，所有待广播的TAC被交替广播一次的周期，如当交替广播TAC1、TAC2、TAC3时，即广播的TAC为{TAC1,TAC2,TAC3,TAC1,TAC2,TAC3,…}，交替广播周期可以为广播一次{TAC1，TAC2，TAC3}的时间或广播一次{TA2，TA3，TA1}的时间，这种情况下，一个TAC交替广播周期的时长等于发送广播消息的3个周期时长。
应理解，本申请实施例中，每个TAC交替广播周期携带的TAC的顺序不限于上述的TAC1、TAC2、TAC3。例如，一个TAC交替广播周期携带TAC的顺序可以任意变化，例如，一个TAC交替广播周期携带TAC的顺序为TAC3、TAC1、TAC2。例如，连续的多个广播消息携带的TAC的顺序为TAC1、TAC2、TAC3、TAC2、TAC1、TAC3、TAC3、TAC1、TAC2…。
430，终端设备在首次检测到当前周期接收的广播消息中的TAC对应的TA不属于第一TA列表时，将该TA记录在第二TA列表中，其中，所述第一TA列表包括用于寻呼所述终端设备的一个或多个TA，所述第二TA列表用于存储检测到的不同于第一TA列表的TA。
也就是说，所述终端设备在首次检测到当前周期接收的广播消息中的TAC对应的TA不属于第一TA列表时，不立刻发起TA更新流程，并将所述TA记录在第二TA列表中。
应理解，本申请实施例中，该第一TA列表可以是网络侧(例如，核心网侧或者卫星 设备侧)维护的，终端设备需要从网络侧获取或更新该第一TA列表，例如，所述第一TA列表是所述终端设备通过高层信令获取的。该第二TA列表是终端设备维护的，该第二TA列表是终端设备自身确定的。
例如，该第一TA列表是该终端设备从卫星设备获取的，具体地，核心网设备可以确定该第一TA列表，并通过卫星设备将该第一TA列表发送至终端设备。核心网设备可以通过第一TA列表寻呼终端设备，核心网设备对终端设备寻呼时，需要在该第一TA列表上所有的TA的波束(即覆盖该第一TA列表中TA的波束)上寻呼终端设备。
440，终端设备继续检测之后的广播消息，并根据之后的广播消息中的TAC确定是否发起TA更新流程。
也就是说，终端设备在首次检测到当前周期接收的广播消息中的TAC对应的TA不属于第一TA列表时，不立刻发起TA更新流程，根据之后的广播消息中的TAC确定是否发起TA更新流程。因此，本申请实施能够避免在现有方式中一旦检测到TA不属于TA列表时直接发起TA更新流程可能导致寻呼资源浪费的问题。
具体地，在440中，所述终端设备继续检测之后的广播消息，并根据之后的广播消息中的TAC确定是否发起TA更新流程，包括：
所述终端设备在检测到之后的广播消息中的TAC对应的TA不属于第一TA列表且不属于第二TA列表时，将所述TA记录在第二TA列表中；
或者，在所述终端设备检查到之后的广播消息中的TAC对应的TA存在有至少一个TA属于所述第一TA列表时，清空所述第二TA列表；
或者，在所述终端设备检查到之后的广播消息中的TAC对应的TA不属于所述第一TA列表，且属于所述第二列表时，所述终端设备发送TA更新流程，以更新所述第一TA列表，同时清空所述第二TA列表。
也就是说，所述终端设备在检测到之后的广播消息中的TAC对应的TA不属于第一TA列表且不属于第二TA列表时，不发起TA更新流程；在所述终端设备检查到之后的广播消息中的TAC对应的TA存在有至少一个TA属于所述第一TA列表时，不发起TA更新流程；只有在所述终端设备检查到之后的广播消息中的TAC对应的TA不属于所述第一TA列表，且属于所述第二列表时，所述终端设备才发起TA更新流程，以更新所述第一TA列表。
例如，TA更新流程可以是终端设备通过卫星设备向核心网设备发送请求以获取更新后的TA列表，具体地TA更新流程可以参考现有标准中的描述，此处不再赘述。
应理解，在本申请实施例中，一个周期发送的广播消息中可以携带一个TAC；可选地，一个周期发送的广播消息中也可以携带多个TAC。
上文在420中描述了一个广播消息携带一个TAC的例子，一个广播消息携带多个TAC的情况，与上述携带一个TAC的情况类似。例如，一个广播消息携带两个TAC，且当卫星设备的一个波束覆盖区域属于多个TA，例如4个TA时，卫星设备可以发送交替携带该4个TA对应的TAC，即TA1对应的TAC1、TA2对应的TAC2、TA3对应的TAC3和TA4对应的TAC4。例如，一个周期发送的广播消息携带的TAC为TAC1和TAC2，下个周期发送的广播消息携带TAC3和TAC4，再下个周期发送的广播消息携带TAC1和TAC2(应理解，当一个TAC交替广播周期携带TAC的顺序不固定时，该周期广播消息携带的 TAC1和TAC2可以替换成TAC1和TAC3等，本申请实施例并不限于此)。
应理解，在一个广播消息携带一个TAC时，终端设备需要等待接收之后的广播消息，并根据之后的广播消息中的TAC决定是否需要发起TA更新流程。这种情况下，终端设备需要等待终端设备判断多个周期才能确定是否需要发起TA更新流程，等待时间可能较长，在当一个广播消息携带多个TAC时，可以减小终端设备的确定时间，即缩短终端设备确定是否发起TA更新流程的等待时间。
具体地，本实施例可以对卫星通信广播信号中的TAC字段进行扩展，假设原TAC字段包含y个比特信息，则扩展后的TAC字段包含Ny个比特信息，每y个比特信息可以对应一个相同的TAC或多个不同的TAC。卫星波束可以不采用周期性交替广播TAC的方式，而采用一次性广播多TAC的方式。或者，卫星设备也可以采用周期性交替广播TAC，且一次性广播多TAC的方式的发送广播消息，这种方式能够减少用户等待时间。
具体地，本申请实施例中卫星设备可以采用多种方式周期性发送广播消息，例如，所述卫星设备根据广播消息的周期信息与TAC的第一对应关系周期性发送广播消息，其中，所述第一对应关系可以预存在所述卫星设备中，或者，所述第一对应关系是由核心网设备通知的。
下文以一个广播消息携带一个TAC为例，分情况描述卫星设备发送广播消息的具体形式，并描述针对各个情况终端设备具体地更新TA的方法，应理解一个广播消息携带多个TAC的情况，可以参考与一个广播消息携带一个TAC的例子，只要将一个广播消息中携带的一个TAC替换成多个TAC即可，为了避免重复，不再对一个广播消息携带多个TAC的情况进行展开描述。
情况一：
所述周期信息包括各个周期的序号，
所述第一对应关系包括周期性发送广播消息的各个周期序号以及与所述各个周期序号一一对应的TAC。
也就是说，所述卫星设备根据周期性发送广播消息的各个周期序号以及与所述各个周期序号一一对应的TAC周期性发送广播消息。
具体地，在本实施例中，卫星波束在覆盖到多个TA的部分区域时，周期性交替广播多个TAC。如图3所示，当一个卫星波束处于左边图所示位置时，连续广播TA1的TAC(TAC1)，当其处于图3中间附图所示位置时，该波束同时覆盖到TA1和TA2，则此时给该波束分配多个TA(例如，TA1、TA2)并周期性交替广播TA1和TA2的TAC(即TAC1、TAC2)，当该波束完全移动到TA2中时，如图3右边图所示，则连续广播TA2的TAC(TAC2)。
具体地，上述对应关系如表1所示。该表格可以作为星历信息的一部分由卫星已知，或由核心网通知卫星设备。卫星设备可以根据表1所示的对应关系确定广播消息携带的TAC，并发送各个广播消息。
应理解，本申请实施例中，各个周期的发送时间可以是星历信息里规定的，也可以是核心网设备指示卫星设备的，每相邻的两个广播消息的周期间隔可以相同，本申请实施例并不限于此。
应理解，在本申请实施例中，当卫星波束周期性交替广播TA1和TA2的TAC时，无 论是对TA1中的终端设备还是对TA2中的终端设备进行寻呼，均可以实现在该波束上寻呼终端设备。
表1
广播的周期序号 TAC
1 TAC1
… …
m TAC1
m+1 TAC2
m+2 TAC1
m+3 TAC2
… …
n TAC1
n+1 TAC2
n+2 TAC2
… …
如表1所示，在第1至第m周期，卫星波束覆盖区域属于TA1，这些周期的广播消息携带一个TAC，即TAC1；从第m周期开始至第n周期，卫星波束覆盖区域属于TA1和TA2时，这些周期的广播消息交替携带TAC1和TAC2；从第n周期开始，卫星波束覆盖区域属于TA2，这些周期的广播消息携带一个TAC，即TAC2。
下面描述在情况一种终端设备具体地更新TA的方法。
具体而言，所述终端设备在检测到之后的广播消息中的TAC对应的TA不属于第一TA列表且不属于第二TA列表时，将所述TA记录在第二TA列表中；或者，在所述终端设备检查到之后的广播消息中的TAC对应的TA存在有至少一个TA属于所述第一TA列表时，清空所述第二TA列表；或者，在所述终端设备检查到之后的广播消息中的TAC对应的TA不属于所述第一TA列表，且属于所述第二列表时，所述终端设备发送TA更新流程，以更新所述第一TA列表。
具体而言，本申请实施例中，可以设置终端设备的“TAC等待并监听状态”和“TA监听列表”(即第二TA列表)，在终端设备检查到TAC对应的TA不属于第一TA列表时，该终端设备进入TAC等待并监听状态，将所述TA记录在第二TA列表中，不进行TA更新，等待并监听之后的广播消息，并根据之后的广播消息中的TAC判断是否需要发起TA更新。具体地，在TAC等待并监听状态下，终端设备用当前监听到的TAC计算TAI并记录至TA监听列表(即第二TA列表)，并等待下一个周期的TAC。应理解，“TA监听列表”可以是一个终端设备在TAC等待并监听状态下，记录终端设备所监听到的TA信息的列表。
下面结合图5详细本申请实施例中描述终端设备更新TA的具体方法。
510，终端设备监听卫星波束广播的TAC，计算TAI并判断是否属于自身的TA列表(即第一TA列表)，若是则检测下一周期的广播消息，重复执行510，否则执行步骤520。
520，终端设备进入TAC等待并监听状态，用当前监听到的TAC计算TAI并记录至TA监听列表(即第二TA列表)，并等待下一周期卫星广播的TAC。
530，计算TAI并判断是否属于自身的TA列表，若是则退出TAC等待并监听状态，清空TA监听列表并返回步骤510。若否则执行步骤540。
540，判断是否属于TA监听列表，若属于TA监听列表，说明已监听完一个TAC交替广播周期，且该周期内没有监听到自身TA列表中TA对应的TAC，之后，执行步骤550，否则返回执行步骤520。
550，发起TA更新流程，更新TA列表(即更新第一TA列表)。
因此，在本申请实施例中，对于处于同时覆盖到多个TA的卫星波束覆盖范围内的终端设备来说，不需要给其分配更大的TA列表，即可避免由于卫星波束“TAC硬切换”造成的不必要的TA更新，从而节省信令开销和寻呼资源。
情况二：
所述周期信息包括各个周期的起始时刻，
所述第一对应关系包括周期性发送广播消息的各个周期的起始时刻以及与所述各个周期起始时刻一一对应的TAC。
也就是说，所述卫星设备根据周期性发送广播消息的各个周期的起始时刻以及与所述各个周期起始时刻一一对应的TAC周期性发送广播消息。
具体地，上述对应关系如表2所示。该表格可以作为星历信息的一部分由卫星已知，或由网络通知卫星设备。卫星设备可以根据表2所示的对应关系确定广播消息携带的TAC，并发送各个广播消息。
应理解，本申请实施例中，各个周期的发送时间可以是星历信息里规定的，也可以是核心网设备指示卫星设备的，每相邻的两个广播消息的周期间隔可以相同，本申请实施例并不限于次。
应理解，表2与表1的区别在于，表1中是每个周期的序号与TAC的对应关系，表2为每个周期的起始时刻与TAC的对应关系，
将表1中不同周期序号替换为周期的起始时刻，即可变成如表2的形式。应理解，表2中仅出了t i为周期起始时刻的例子，但本申请实施例并不限于此，例如，表2中t i可以替换成周期的结束时刻周期的时长周期的中间时刻等时间信息。
具体地，表2的相关描述可以参考上文中表1的描述，此处不再赘述。
表2
每个周期的起始时刻 TAC
t 1 TAC1
… …
t m TAC1
t m+1 TAC2
… …
应理解，在情况二中，终端设备具体地更新TA的方法可以参考上文情况一种图5所 示的方法，为避免重复，此处不再赘述。
应理解，上文结合情况一和情况二描述了卫星设备发送广播消息的具体例子，可选地，本申请实施例中，卫星设备还可以采用其他方式来发送广播消息。下面结合情况三进行详细描述。
情况三：
所述周期信息包括周期的起始时刻，所述第一关系包括各个TAC及其对应的周期起始时刻；
或者，所述周期信息包括周期的起始序号，所述第一关系包括各个TAC及其对应的周期的起始序号；
或者，所述周期信息包括周期的终止时刻，所述第一关系包括各个TAC及其对应的周期终止时刻；
或者，所述周期信息包括周期的终止序号，所述第一关系包括各个TAC及其对应的周期终止序号；
或者，所述周期信息包括周期时间区间，所述第一关系包括各个TAC及其对应的周期时间区间；
或者，所述周期信息包括周期序号区间，所述第一关系包括各个TAC及其对应的周期序号区间；
或者，所述周期信息包括周期个数，所述第一关系包括各个TAC及其对应的周期个数。
应理解，在情况三中上述名词“各个TAC”可以替换成“每个TAC”、“每种TAC”或“不同TAC”，也就是说在情况三的每一种方式中，一种TAC仅对应一个周期信息，不同的TAC对应的周期信息的取值不同。
也就是说，所述卫星设备根据上述第一关系的多种形式中的一种周期性发送广播消息。
情况三可以看成是情况一或情况二的变形，卫星设备可以采用不同形式的表格记录卫星波束所广播的TA信息。
针对情况三中的多种形式，下面分别针对每个形式描述卫星设备具体如何发送广播消息。
方式一：所述周期信息包括周期的起始时刻，所述第一关系包括各个TAC及其对应的周期起始时刻。
应理解，在方式一中，下个TAC的周期起始时刻可以作为当前TAC对应的周期结束时刻。
具体而言，卫星设备可以在一个TAC对应的周期起始时刻到该一个TAC对应的周期结束时刻(即下一TAC对应的周期起始时刻)，之间的一个或多个周期发送的广播消息中均携带该一个TAC。
应理解，在方式一中，终端设备具体地更新TA的方法可以参考上文情况一种图5所示的方法，为避免重复，此处不再赘述。
方式二：所述周期信息包括周期的起始序号，所述第一关系包括各个TAC及其对应的周期的起始序号；
应理解，在方式二中，下个TAC的周期起始序号可以作为当期TAC对应的周期结束序号。
具体而言，卫星设备可以在一个TAC对应的周期起始序号到该一个TAC对应的周期结束序号(即下一TAC对应的周期起始序号)之间的一个或多个周期发送的广播消息中均携带该一个TAC。
应理解，在方式二中，终端设备具体地更新TA的方法可以参考上文情况一种图5所示的方法，为避免重复，此处不再赘述。
方式三：所述周期信息包括周期的终止时刻，所述第一关系包括各个TAC及其对应的周期终止时刻。
应理解，在方式三中，前一个TAC的周期终止时刻可以作为下个TAC对应的周期起始时刻。
具体而言，卫星设备可以在一个TAC对应的周期起始时刻(即该一个TAC的前一个TAC的周期终止时刻)到该一个TAC对应的周期终止时刻之间的一个或多个周期发送的广播消息中均携带该一个TAC。
应理解，在方式三中，终端设备具体地更新TA的方法可以参考上文情况一种图5所示的方法，为避免重复，此处不再赘述。
方式四：所述周期信息包括周期的终止序号，所述第一关系包括各个TAC及其对应的周期终止序号；
应理解，在方式四中，前一个TAC的周期终止序号可以作为下个TAC对应的周期起始序号。
具体而言，卫星设备可以在一个TAC对应的周期起始序号(即该一个TAC的前一个TAC的周期终止序号)到该一个TAC对应的周期终止序号之间的一个或多个周期发送的广播消息中均携带该一个TAC。
应理解，在方式四中，终端设备具体地更新TA的方法可以参考上文情况一种图5所示的方法，为避免重复，此处不再赘述。
方式五：所述周期信息包括周期时间区间，所述第一关系包括各个TAC及其对应的周期时间区间；
具体而言，卫星设备可以在一个TAC对应的周期时间区间对应的一个或多个周期发送的广播消息中均携带该一个TAC。
应理解，在方式五中，终端设备具体地更新TA的方法可以参考上文情况一种图5所示的方法，为避免重复，此处不再赘述。
方式六：所述周期信息包括周期序号区间，所述第一关系包括各个TAC及其对应的周期序号区间；
具体而言，卫星设备可以在一个TAC对应的周期序号区间对应的一个或多个周期发送的广播消息中均携带该一个TAC。
应理解，在方式六中，终端设备具体地更新TA的方法可以参考上文情况一种图5所示的方法，为避免重复，此处不再赘述。
方式七：所述周期信息包括周期个数，所述第一关系包括各个TAC及其对应的周期个数。
具体而言，卫星设备可以在一个TAC对应的周期个数对应的一个或多个周期发送的广播消息中均携带该一个TAC。
应理解，在方式七中，终端设备具体地更新TA的方法可以参考上文情况一种图5所示的方法，为避免重复，此处不再赘述。
本申请实施例卫星设备通过周期信息与TAC的对应关系能够确定发送TAC的具体方式，由于该对应关系包括的是各个TAC及其对应的周期信息，与每一个周期序号或周期时间与TAC的对应关系相比，数据量较小，在该对应关系存在星历信息中的情况下，能够降低星历信息的数据量，在该对应关系是核心网指示的情况下，能够降低信令开销，节省资源。
前文介绍了终端设备在检测到TAC对应的TA不属于第一TA列表时，该终端设备进入TAC等待并监听状态。这种情况下，不管终端是否需要发起TA更新流程，都得至少需要终端设备等到下个周期，根据下个周期的广播消息才能确定是否发起TA更新流程。可替代地，本申请实施例中，可以在广播消息中携带第一指示信息，该第一指示信息用于指示广播消息是否依次交替携带TAC。
具体而言，在该第一指示信息指示广播消息依次交替携带TAC时，可以采用图5的方式进行TA更新。在该第一指示信息指示广播消息不是依次交替携带TAC时，在终端设备检测到TAC对应的TA不属于第一TA列表时，该终端设备无需等待下个周期，可以立即发起TA更新流程。
通过增加第一指示信息，终端设备可以通过第一指示信息判断该波束是否处于周期性交替广播TAC的阶段(即图3中的中间图所示的阶段)。对于第一指示信息指示广播消息不是依次交替携带TAC，终端设备监听到TAC的变化后可立即执行TA更新流程，而不需要等待下一个周期波束广播的TAC，从而节省等待时间，更加及时地更新TA列表。
可选地，在一种实现方式中，所述第一指示信息为复用TAC字段中的一个或多个比特。
例如，以1比特为例，如图6所示，假设原TAC字段为16比特0、1序列，那么可以采用任意一个比特，例如，第一个比特作为第一指示信息，该比特为1(或者0)时表示该波束处于周期性交替广播TAC的阶段，为0(或者1)时表示该波束只广播一个TAC。
可选地，在另一种实现方式中，所述第一指示信息为TAC字段中新增加的一个或多个比特。
例如，以1比特为例，如图7所示，在原TAC字段的基础上增加一个比特或多个比特作为指示信息，假设增加一个比特的指示信息，该比特为1(或者0)时表示该波束处于周期性交替广播TAC的阶段，为0(或者1)时表示该波束只广播一个TAC。
应理解，该第一指示信息不限于是一个比特，例如，该第一指示信息可以是多个比特，该第一指示信息还可以指示携带同一TAC的广播消息持续的周期时长或周期个数等。
下面结合图8详细描述本申请实施例中存在指示信息时用户监听TAC以及TA更新的具体方法。
810，终端设备监听卫星波束广播的TAC，计算TAI并判断是否属于自身的TA列表(即第一TA列表)，若是则检测下一周期的广播消息，重复执行810，否则执行步骤820。
820，终端设备判断第一指示信息是否指示卫星波束处于周期性交替广播TAC的阶 段，若是则进入步骤830，若否则进入步骤860。
830，终端设备进入TAC等待并监听状态，用当前监听到的TAC计算TAI并记录至TA监听列表(即第二TA列表)，并等待下一周期卫星广播的TAC。
840，计算TAI并判断是否属于自身的TA列表，若是则退出TAC等待并监听状态，清空TA监听列表并返回步骤810。若否则执行步骤850。
850，判断是否属于TA监听列表，若属于TA监听列表，说明已监听完一个TAC交替广播周期，且该周期内没有监听到自身TA列表中TA对应的TAC，之后，执行步骤860，否则返回执行步骤830。
860，发起TA更新流程，更新TA列表(即更新第一TA列表)。
在本实施例中，终端设备可以通过指示信息判断该波束是否处于周期性交替广播TAC的阶段，对于本实施例中第一指示信息指示广播消息不是依次交替携带TAC，例如，第一指示信息为0时，终端设备监听到TAC的变化后可立即执行TA更新流程，而不需要等待下一个周期波束广播的TAC，从而节省等待时间，更加及时地更新TA列表。
可选地，作为另一实施例，本申请实施例中可以在广播消息中携带第二指示信息，所述第二指示信息用于指示以下信息中的至少一种：
同一个TAC连续广播次数，同一个TAC连续广播周期数，同一个TAC连续广播时间，以及交替广播的TAC的个数。
可选的，所述第二指示信息为复用TAC字段中的一个或多个比特，或者所述第二指示信息为TAC字段中新增加的一个或多个比特。
可选地，可以参考图6或图7，把图6或图7中的第一指示信息替换成第二指示信息。相比于图在卫星广播信号中新增或在原TAC字段中用任意1个比特或多个比特作为第一指示信息，本申请实施例中，第二指示信息不指示卫星是否处于周期性交替广播TAC的阶段，而是可以指示同一个TAC连续广播的次数、周期数、时间、交替广播的TAC个数等。终端设备可以根据第二指示信息，不再连续监听卫星波束广播的TAC，而是可以选择间隔一定的周期数、一段时间再继续监听广播消息。通过这种方式，无需终端设备连续监听广播消息，能够节省资源，降低终端设备的计算开销。
例如，假设第二指示信息指示(例如，通过指示同一个TAC连续广播的次数、周期数、时间来指示)发送4个周期TAC1，接着发送1个周期TAC2，再发送1个周期TAC1，接着再发送4个周期TAC2，终端设备可以根据第二指示信息确定TAC2对应4个周期，也即终端设备可以知道此时卫星波束在发送完4个周期TAC1，1个周期TAC2，和1个周期TAC1之后，会连续发送TAC2了，也就是说，终端设备知道在检测到最后1个周期的TAC1之后，会连续发送4个周期的TAC2，因此，终端设备在检测到最后1个周期的TAC1之后，不需要再等一个周期看是否下一周期发送的是TAC1，从而节省等待时间。
再例如，假设第二指示信息指示交替广播的TAC的个数为2，在卫星设备通过多个连续的多个周期发送TAC1后，接着发送1个周期TAC2，再发送1个周期TAC3，在终端设备检测到该TAC3之后，由于第二指示信息指示交替广播的TAC的个数为2，那么终端设备可以知道下个周期广播的TAC为TAC2或TAC3，而不是TAC1，这种情况下，假设第一列表中仅包括TAC1，那么终端设备可以不用监听下个周期广播消息，即可确定下个周期的广播消息携带的TAC不同于TAC1，能够节省等待时间。
因此，本申请实施例通过第二指示信息隐式或显示指示同一个TAC广播的周期数，进而终端设备可以根据第二指示信息的指示，无需终端设备连续监听广播消息，能够节省资源，降低终端设备的计算开销。
应理解，当然，在本申请实施例中，当TAC广播稳定时，比如第二指示信息指示连续多个周期广播同一个TAC时，终端设备也可以经过数个周期后再监听或再计算TAC，从而节省计算资源。
应理解，在情况二中，终端设备具体地更新TA的方法可以参考上文情况一种图5所示的方法，为避免重复，此处不再赘述。
应理解，在存在第二指示信息的情况，终端设备具体地更新TA的方法可以参考上文图5中的更新方法，区别在于，在图5方法中，终端设备需要连续监听每个周期的广播消息，在存在第二指示信息时，终端设备可以按照上文描述跳过一些周期广播的广播消息，即无需连续监听广播消息，为避免重复，此处不再赘述。
应理解，上文中图1至图8的例子，仅仅是为了帮助本领域技术人员理解本申请实施例，而非要将本申请实施例限于所例示的具体数值或具体场景。本领域技术人员根据所给出的图1至图8的例子，显然可以进行各种等价的修改或变化，这样的修改或变化也落入本申请实施例的范围内。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
上文中，结合图1至图8详细描述了本申请实施例的方法，下面结合图9至图12描述本申请实施例的装置。
图9为本申请实施例一种数据传输的通信装置900，该通信装置900可以包括：处理单元910和收发单元920；
在一种实现方式中，该通信装置900能够配置用于上述各个方法实施中终端设备对应的各个流程和步骤。
具体地，所述收发单元用于接收卫星设备周期性发送的广播消息，所述广播消息交替携带至少两个跟踪区TA中的一个或多个TA对应的跟踪区域码TAC，所述卫星设备的波束的覆盖区域属于所述至少两个TA；
所述处理单元用于：
在首次检测到当前周期接收的广播消息中的TAC对应的TA不属于第一TA列表时，将所述TA记录在第二TA列表中，其中，所述第一TA列表包括用于寻呼所述通信装置的一个或多个TA，所述第二TA列表用于存储检测到的不同于第一TA列表的TA；
继续检测之后的广播消息，并根据之后的广播消息中的TAC确定是否发起TA更新流程。
本申请实施例中给一个同时覆盖到多个TA的卫星波束分配多个TAC，可以采用周期性交替广播多个TAC或一次性广播多个TAC的方式。终端设备在监听到卫星波束TAC发生变化时，可不立即执行TA更新，而是确认一个交替广播周期内没有自身所属TA的TAC后，再执行TA更新，从而避免由于“TAC硬切换”所造成的部分终端设备可能发生不必要TA更新所带来的信令开销。同时，如果该终端设备为固定终端设备或移动范围有 限，本申请实施例不需要分配更大的TA列表，从而节省寻呼资源。
可选地，所述处理单元具体用于：
在检测到之后的广播消息中的TAC对应的TA不属于第一TA列表且不属于第二TA列表时，将所述TA记录在第二TA列表中；
或者，
在检查到之后的广播消息中的TAC对应的TA存在有至少一个TA属于所述第一TA列表时，清空所述第二TA列表；
或者，
在检查到之后的广播消息中的TAC对应的TA不属于所述第一TA列表，且属于所述第二列表时，所述终端设备发起TA更新流程，以更新所述第一TA列表，同时清空所述第二TA列表。
可选地，所述第一TA列表是所述通信装置通过高层信令获取的。
可选地，一个周期发送的广播消息中携带一个TAC；
或者，
一个周期发送的广播消息中携带多个TAC。
可选地，所述广播消息携带第一指示信息，所述第一指示信息指示广播消息是否依次交替携带TAC。
可选地，所述第一指示信息为复用TAC字段中的一个或多个比特，或者所述第一指示信息为TAC字段中新增加的一个或多个比特。
可选地，所述广播消息携带第二指示信息，所述第二指示信息用于指示以下信息中的至少一种：
同一个TAC连续广播次数，同一个TAC连续广播周期数，同一个TAC连续广播时间，以及交替广播的TAC的个数。
可选地，所述第二指示信息为复用TAC字段中的一个或多个比特，或者所述第二指示信息为TAC字段中新增加的一个或多个比特。
应理解，装置900具有上述图方法实施例中终端设备的任意功能，此处不再做赘述。
应理解，本申请实施例中的术语“单元”可以指应用特有集成电路(application specific integrated circuit，ASIC)、电子电路、用于执行一个或多个软件或固件程序的处理器(例如共享处理器、专有处理器或组处理器等)和存储器、合并逻辑电路和/或其它支持所描述的功能的合适组件。
在一个可选例子中，本申请提供的装置900对应上述方法实施例中终端设备执行的过程，该装置中的各个单元/模块的功能可以参见上文中的描述，此处不再赘述。
应理解，图9所述的装置可以是终端设备，也可以是安装于终端设备中的芯片或集成电路。
图10为本申请实施例提供的一种终端设备的结构示意图，该终端设备1000可应用于如图1所示的系统中。
如图10所示，终端设备1000可以包括处理器1010和收发器1020，处理器1010和收发器1020相连，可选地，终端设备1000还包括存储器1030，存储器1030与处理器1010相连，进一步可选地，该接入点1000还可以包括总线系统1040。其中，处理器1010、存 储器1030和收发器1020可以通过总线系统1040相连，该存储器1030可以用于存储指令，该处理器1010可以对应处理单元910，收发器1020可以对应收发单元920。具体地，处理1010用于执行指令，以控制收发器1020收发信息或信号，存储器1030存储指令。
应理解，在本申请实施例中，处理器可以是中央处理单元(Central Processing Unit，简称为“CPU”)，处理器还可以是其他通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现成可编程门阵列(FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。
存储器可以包括只读存储器和随机存取存储器，并向处理器提供指令和数据。存储器的一部分还可以包括非易失性随机存取存储器。例如，存储器还可以存储设备类型的信息。
总线系统除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
在一种实现方式中，图10所示的终端设备1000能够实现上述方法实施例中涉及终端设备的各个过程。终端设备1000中的各个模块的操作和/或功能，分别为了实现上述方法实施例中的相应流程。具体可参见上述方法实施例中的描述，为避免重复，此处适当省略详述描述。
图11为本申请实施例提供的一种数据传输的通信装置的结构示意图，该通信装置1100可以包括：
处理单元1110和收发单元1120。
所述处理单元用于确定波束的覆盖区域属于至少两个跟踪区TA；
所述收发单元用于通过所述波束周期性发送广播消息，所述广播消息交替携带所述至少两个TA中的一个或多个TA对应的跟踪区域码TAC。
本申请实施例中给一个同时覆盖到多个TA的卫星波束分配多个TAC，可以采用周期性交替广播多个TAC或一次性广播多个TAC的方式。终端设备在监听到卫星波束TAC发生变化时，可不立即执行TA更新，而是确认一个交替广播周期内没有自身所属TA的TAC后，再执行TA更新，从而避免由于“TAC硬切换”所造成的部分终端设备可能发生不必要TA更新所带来的信令开销。同时，如果该终端设备为固定终端设备或移动范围有限，本申请实施例不需要分配更大的TA列表，从而节省寻呼资源。
可选地，所述收发单元具体用于：
根据广播消息的周期信息与TAC的第一对应关系周期性发送广播消息；
其中，所述第一对应关系预存在所述通信装置中，或者，所述第一对应关系是由核心网设备通知的。
可选地，所述周期信息包括各个周期的序号，
所述第一对应关系包括周期性发送广播消息的各个周期序号以及与所述各个周期序号一一对应的TAC。
可选地，所述周期信息包括各个周期的起始时刻，
所述第一对应关系包括周期性发送广播消息的各个周期的起始时刻以及与所述各个周期起始时刻一一对应的TAC。
可选地，所述周期信息包括周期的起始时刻，所述第一关系包括各个TAC及其对应的周期起始时刻；
或者，
所述周期信息包括周期的起始序号，所述第一关系包括各个TAC及其对应的周期的起始序号；
或者，
所述周期信息包括周期的终止时刻，所述第一关系包括各个TAC及其对应的周期终止时刻；
或者，
所述周期信息包括周期的终止序号，所述第一关系包括各个TAC及其对应的周期终止序号；
或者，
所述周期信息包括周期时间区间，所述第一关系包括各个TAC及其对应的周期时间区间；
或者，
所述周期信息包括周期序号区间，所述第一关系包括各个TAC及其对应的周期序号区间；
或者，
所述周期信息包括周期个数，所述第一关系包括各个TAC及其对应的周期个数。
可选地，一个周期发送的广播消息中携带一个TAC；
或者，
一个周期发送的广播消息中携带多个TAC。
可选地，所述广播消息携带第一指示信息，所述第一指示信息用于指示广播消息是否依次交替携带TAC。
可选地，所述第一指示信息为复用TAC字段中的一个或多个比特，或者所述第一指示信息为TAC字段中新增加的一个或多个比特。
可选地，所述广播消息携带第二指示信息，所述第二指示信息用于指示以下信息中的至少一种：
同一个TAC连续广播次数，同一个TAC连续广播周期数，同一个TAC连续广播时间，以及交替广播的TAC的个数。
可选地，所述第二指示信息为复用TAC字段中的一个或多个比特，或者所述第二指示信息为TAC字段中新增加的一个或多个比特。
应理解，装置1100具有上述方法实施例中卫星设备的任意功能，此处不再做赘述。
应理解，图11所述的装置可以是卫星设备，也可以是安装于卫星设备中的芯片或集 成电路。
图12为本申请实施例提供的一种卫星设备的结构示意图。该卫星设备1200可应用于如图1所示的系统中。
如图12所示，卫星设备1200可以包括处理器1210和收发器1220，处理器1210和收发器1220相连，可选地，发起设备1200还包括存储器1230，存储器1230与处理器1210相连，进一步可选地，该发起设备1200还可以包括总线系统1240。其中，处理器1210、存储器1230和收发器1220可以通过总线系统1240相连，该存储器1230可以用于存储指令，该处理器1210可以对应处理单元1110，收发器1220可以对应收发单元1120。具体地，处理1210用于执行指令，以控制收发器1220收发信息或信号，存储器1230用于存储指令。
一种实现方式中，图12所示的卫星设备1200能够实现上述法实施例中涉及卫星设备的各个过程。卫星设备1200中的各个模块的操作和/或功能，分别为了实现上述方法实施例中的相应流程。具体可参见上述方法实施例中的描述，为避免重复，此处适当省略详述描述。
本申请实施例还提供了一种处理装置，包括处理器和接口；所述处理器，用于执行上述任一方法实施例中的通信的方法。
应理解，上述处理装置可以是一个芯片。例如，该处理装置可以是现场可编程门阵列(field-programmable gate array，FPGA)，可以是专用集成芯片(application specific integrated circuit，ASIC)，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。
在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应注意，本申请实施例中的处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现成可编程门阵列(field programmable gate array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储 介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
应理解，上述处理器可以通过硬件来实现也可以通过软件来实现，当通过硬件实现时，该处理器可以是逻辑电路、集成电路等；当通过软件来实现时，处理器可以是一个通用处理器，通过读取存储器中存储的软件代码来实现，该存储器可以集成在处理器中，可以位于该处理器之外，独立存在。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供一种通信系统，其包括前述的卫星设备和终端设备，可选地，还可以包括核心网设备。
本申请实施例还提供了一种计算机可读介质，其上存储有计算机程序，该计算机程序被计算机执行时实现上述任一方法实施例中的方法。
本申请实施例还提供了一种计算机程序产品，该计算机程序产品被计算机执行时实现上述任一方法实施例中的方法。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
应理解，上文中描述了通信系统中下行传输时通信的方法，但本申请并不限于此，可选地，在上行传输时也可以采用上文类似的方案，为避免重复，此处不再赘述。
上述各个装置实施例中网络设备与终端设备和方法实施例中的网络设备或终端设备完全对应，由相应的模块或单元执行相应的步骤，例如发送模块(发射器)方法执行方法实施例中发送的步骤，接收模块(接收器)执行方法实施例中接收的步骤，除发送接收外的其它步骤可以由处理模块(处理器)执行。具体模块的功能可以参考相应的方法实施例。发送模块和接收模块可以组成收发模块，发射器和接收器可以组成收发器，共同实现收发功能；处理器可以为一个或多个。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A,B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a,b,或c中的至少一项(个)，可以表示：a,b,c,a-b,a-c,b-c,或a-b-c，其中a,b,c可以是单个，也可以是多个。
应理解，说明书通篇中提到的“一个实施例”或“一实施例”意味着与实施例有关的特定特征、结构或特性包括在本申请的至少一个实施例中。因此，在整个说明书各处出现的“在一个实施例中”或“在一实施例中”未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
在本说明书中使用的术语“部件”、“模块”、“系统”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地系统、分布式系统和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它系统交互的互联网)的信号通过本地和/或远程进程来通信。
还应理解，本文中涉及的第一、第二、第三、第四以及各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各种说明性逻辑块(illustrative logical block)和步骤(step)，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装 置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令(程序)。在计算机上加载和执行所述计算机程序指令(程序)时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘solid state disk(SSD))等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (40)

  1. 一种跟踪区TA更新的方法，其特征在于，包括：
    终端设备接收卫星设备周期性发送的广播消息，所述广播消息交替携带至少两个跟踪区TA中的一个或多个TA对应的跟踪区域码TAC，所述卫星设备的波束的覆盖区域属于所述至少两个TA；
    所述终端设备在首次检测到当前周期接收的广播消息中的TAC对应的TA不属于第一TA列表时，将所述TA记录在第二TA列表中，其中，所述第一TA列表包括用于寻呼所述终端设备的一个或多个TA，所述第二TA列表用于存储检测到的不同于第一TA列表的TA；
    所述终端设备继续检测之后的广播消息，并根据之后的广播消息中的TAC确定是否发起TA更新流程。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备继续检测之后的广播消息，并根据之后的广播消息中的TAC确定是否发起TA更新流程，包括：
    所述终端设备在检测到之后的广播消息中的TAC对应的TA不属于第一TA列表且不属于第二TA列表时，将所述TA记录在第二TA列表中；
    或者，
    在所述终端设备检查到之后的广播消息中的TAC对应的TA存在有至少一个TA属于所述第一TA列表时，清空所述第二TA列表；
    或者，
    在所述终端设备检查到之后的广播消息中的TAC对应的TA不属于所述第一TA列表，且属于所述第二列表时，所述终端设备发起TA更新流程，以更新所述第一TA列表，同时清空所述第二TA列表。
  3. 根据权利要求1或2所述的方法，其特征在于，
    所述第一TA列表是所述终端设备通过高层信令获取的。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，
    一个周期发送的广播消息中携带一个TAC；
    或者，
    一个周期发送的广播消息中携带多个TAC。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，
    所述广播消息携带第一指示信息，所述第一指示信息指示广播消息是否依次交替携带TAC。
  6. 根据权利要求5所述的方法，其特征在于，
    所述第一指示信息为复用TAC字段中的一个或多个比特，或者所述第一指示信息为TAC字段中新增加的一个或多个比特。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，
    所述广播消息携带第二指示信息，所述第二指示信息用于指示以下信息中的至少一种：
    同一个TAC连续广播次数，同一个TAC连续广播周期数，同一个TAC连续广播时间，以及交替广播的TAC的个数。
  8. 根据权利要求7所述的方法，其特征在于，
    所述第二指示信息为复用TAC字段中的一个或多个比特，或者所述第二指示信息为TAC字段中新增加的一个或多个比特。
  9. 一种传输广播消息的方法，其特征在于，包括：
    卫星设备确定波束的覆盖区域属于至少两个跟踪区TA；
    所述卫星设备通过所述波束周期性发送广播消息，所述广播消息交替携带所述至少两个TA中的一个或多个TA对应的跟踪区域码TAC。
  10. 根据权利要求9所述的方法，其特征在于，所述卫星设备周期性发送广播消息，包括：
    所述卫星设备根据广播消息的周期信息与TAC的第一对应关系周期性发送广播消息；
    其中，所述第一对应关系预存在所述卫星设备中，或者，所述第一对应关系是由核心网设备通知的。
  11. 根据权利要求10所述的方法，其特征在于，所述周期信息包括各个周期的序号，
    所述第一对应关系包括周期性发送广播消息的各个周期序号以及与所述各个周期序号一一对应的TAC。
  12. 根据权利要求10所述的方法，其特征在于，所述周期信息包括各个周期的起始时刻，
    所述第一对应关系包括周期性发送广播消息的各个周期的起始时刻以及与所述各个周期起始时刻一一对应的TAC。
  13. 根据权利要求10所述的方法，其特征在于，
    所述周期信息包括周期的起始时刻，所述第一关系包括各个TAC及其对应的周期起始时刻；
    或者，
    所述周期信息包括周期的起始序号，所述第一关系包括各个TAC及其对应的周期的起始序号；
    或者，
    所述周期信息包括周期的终止时刻，所述第一关系包括各个TAC及其对应的周期终止时刻；
    或者，
    所述周期信息包括周期的终止序号，所述第一关系包括各个TAC及其对应的周期终止序号；
    或者，
    所述周期信息包括周期时间区间，所述第一关系包括各个TAC及其对应的周期时间区间；
    或者，
    所述周期信息包括周期序号区间，所述第一关系包括各个TAC及其对应的周期序号 区间；
    或者，
    所述周期信息包括周期个数，所述第一关系包括各个TAC及其对应的周期个数。
  14. 根据权利要求9至13中任一项所述的方法，其特征在于，
    一个周期发送的广播消息中携带一个TAC；
    或者，
    一个周期发送的广播消息中携带多个TAC。
  15. 根据权利要求9至14中任一项所述的方法，其特征在于，
    所述广播消息携带第一指示信息，所述第一指示信息用于指示广播消息是否依次交替携带TAC。
  16. 根据权利要求15所述的方法，其特征在于，
    所述第一指示信息为复用TAC字段中的一个或多个比特，或者所述第一指示信息为TAC字段中新增加的一个或多个比特。
  17. 根据权利要求9至16中任一项所述的方法，其特征在于，
    所述广播消息携带第二指示信息，所述第二指示信息用于指示以下信息中的至少一种：
    同一个TAC连续广播次数，同一个TAC连续广播周期数，同一个TAC连续广播时间，以及交替广播的TAC的个数。
  18. 根据权利要求17所述的方法，其特征在于，
    所述第二指示信息为复用TAC字段中的一个或多个比特，或者所述第二指示信息为TAC字段中新增加的一个或多个比特。
  19. 一种通信装置，其特征在于，包括：处理单元和收发单元；
    所述收发单元用于接收卫星设备周期性发送的广播消息，所述广播消息交替携带至少两个跟踪区TA中的一个或多个TA对应的跟踪区域码TAC，所述卫星设备的波束的覆盖区域属于所述至少两个TA；
    所述处理单元用于：
    在首次检测到当前周期接收的广播消息中的TAC对应的TA不属于第一TA列表时，将所述TA记录在第二TA列表中，其中，所述第一TA列表包括用于寻呼所述通信装置的一个或多个TA，所述第二TA列表用于存储检测到的不同于第一TA列表的TA；
    继续检测之后的广播消息，并根据之后的广播消息中的TAC确定是否发起TA更新流程。
  20. 根据权利要求19所述的通信装置，其特征在于，所述处理单元具体用于：
    在检测到之后的广播消息中的TAC对应的TA不属于第一TA列表且不属于第二TA列表时，将所述TA记录在第二TA列表中；
    或者，
    在检查到之后的广播消息中的TAC对应的TA存在有至少一个TA属于所述第一TA列表时，清空所述第二TA列表；
    或者，
    在检查到之后的广播消息中的TAC对应的TA不属于所述第一TA列表，且属于所述 第二列表时，所述终端设备发起TA更新流程，以更新所述第一TA列表，同时清空所述第二TA列表。
  21. 根据权利要求19或20所述的通信装置，其特征在于，
    所述第一TA列表是所述通信装置通过高层信令获取的。
  22. 根据权利要求19至21中任一项所述的通信装置，其特征在于，
    一个周期发送的广播消息中携带一个TAC；
    或者，
    一个周期发送的广播消息中携带多个TAC。
  23. 根据权利要求19至22中任一项所述的通信装置，其特征在于，
    所述广播消息携带第一指示信息，所述第一指示信息指示广播消息是否依次交替携带TAC。
  24. 根据权利要求23所述的通信装置，其特征在于，
    所述第一指示信息为复用TAC字段中的一个或多个比特，或者所述第一指示信息为TAC字段中新增加的一个或多个比特。
  25. 根据权利要求19至24中任一项所述的通信装置，其特征在于，
    所述广播消息携带第二指示信息，所述第二指示信息用于指示以下信息中的至少一种：
    同一个TAC连续广播次数，同一个TAC连续广播周期数，同一个TAC连续广播时间，以及交替广播的TAC的个数。
  26. 根据权利要求25所述的通信装置，其特征在于，
    所述第二指示信息为复用TAC字段中的一个或多个比特，或者所述第二指示信息为TAC字段中新增加的一个或多个比特。
  27. 一种通信装置，其特征在于，包括：处理单元和收发单元；
    所述处理单元用于确定波束的覆盖区域属于至少两个跟踪区TA；
    所述收发单元用于通过所述波束周期性发送广播消息，所述广播消息交替携带所述至少两个TA中的一个或多个TA对应的跟踪区域码TAC。
  28. 根据权利要求27所述的通信装置，其特征在于，所述收发单元具体用于：
    根据广播消息的周期信息与TAC的第一对应关系周期性发送广播消息；
    其中，所述第一对应关系预存在所述通信装置中，或者，所述第一对应关系是由核心网设备通知的。
  29. 根据权利要求28所述的通信装置，其特征在于，所述周期信息包括各个周期的序号，
    所述第一对应关系包括周期性发送广播消息的各个周期序号以及与所述各个周期序号一一对应的TAC。
  30. 根据权利要求28所述的通信装置，其特征在于，所述周期信息包括各个周期的起始时刻，
    所述第一对应关系包括周期性发送广播消息的各个周期的起始时刻以及与所述各个周期起始时刻一一对应的TAC。
  31. 根据权利要求28所述的通信装置，其特征在于，
    所述周期信息包括周期的起始时刻，所述第一关系包括各个TAC及其对应的周期起始时刻；
    或者，
    所述周期信息包括周期的起始序号，所述第一关系包括各个TAC及其对应的周期的起始序号；
    或者，
    所述周期信息包括周期的终止时刻，所述第一关系包括各个TAC及其对应的周期终止时刻；
    或者，
    所述周期信息包括周期的终止序号，所述第一关系包括各个TAC及其对应的周期终止序号；
    或者，
    所述周期信息包括周期时间区间，所述第一关系包括各个TAC及其对应的周期时间区间；
    或者，
    所述周期信息包括周期序号区间，所述第一关系包括各个TAC及其对应的周期序号区间；
    或者，
    所述周期信息包括周期个数，所述第一关系包括各个TAC及其对应的周期个数。
  32. 根据权利要求27至31中任一项所述的通信装置，其特征在于，
    一个周期发送的广播消息中携带一个TAC；
    或者，
    一个周期发送的广播消息中携带多个TAC。
  33. 根据权利要求27至32中任一项所述的通信装置，其特征在于，
    所述广播消息携带第一指示信息，所述第一指示信息用于指示广播消息是否依次交替携带TAC。
  34. 根据权利要求33所述的通信装置，其特征在于，
    所述第一指示信息为复用TAC字段中的一个或多个比特，或者所述第一指示信息为TAC字段中新增加的一个或多个比特。
  35. 根据权利要求27至34中任一项所述的通信装置，其特征在于，
    所述广播消息携带第二指示信息，所述第二指示信息用于指示以下信息中的至少一种：
    同一个TAC连续广播次数，同一个TAC连续广播周期数，同一个TAC连续广播时间，以及交替广播的TAC的个数。
  36. 根据权利要求35所述的通信装置，其特征在于，
    所述第二指示信息为复用TAC字段中的一个或多个比特，或者所述第二指示信息为TAC字段中新增加的一个或多个比特。
  37. 一种通信装置，其特征在于，包括处理器和存储器，所述存储器用于存储指令，所述处理器用于执行所述存储器中的指令以实现权利要求1至18中任一项所述的方法。
  38. 根据权利要求37所述的通信装置，其特征在于，所述处理器和所述存储器集成在一起。
  39. 根据权利要求37或38所述的通信装置，其特征在于，所述通信装置为芯片或集成电路。
  40. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有用于执行权利要求1-18中任一项所述的方法的指令。
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