WO2022141639A1 - Procédé et appareil de resélection de cellule, dispositif de communication, et support de stockage - Google Patents

Procédé et appareil de resélection de cellule, dispositif de communication, et support de stockage Download PDF

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Publication number
WO2022141639A1
WO2022141639A1 PCT/CN2021/070169 CN2021070169W WO2022141639A1 WO 2022141639 A1 WO2022141639 A1 WO 2022141639A1 CN 2021070169 W CN2021070169 W CN 2021070169W WO 2022141639 A1 WO2022141639 A1 WO 2022141639A1
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WIPO (PCT)
Prior art keywords
information
time
terminal
cell
service time
Prior art date
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PCT/CN2021/070169
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English (en)
Chinese (zh)
Inventor
李小龙
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北京小米移动软件有限公司
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Filing date
Publication date
Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to PCT/CN2021/070169 priority Critical patent/WO2022141639A1/fr
Priority to CN202180000151.5A priority patent/CN115039445B/zh
Priority to CN202311396727.1A priority patent/CN117460008A/zh
Publication of WO2022141639A1 publication Critical patent/WO2022141639A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1851—Systems using a satellite or space-based relay
    • H04B7/18513—Transmission in a satellite or space-based system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • 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

Definitions

  • the present disclosure relates to the field of wireless communication technologies, but is not limited to the field of wireless communication technologies, and in particular, to a method, apparatus, communication device, and storage medium for cell reselection.
  • New Radio for a terrestrial network (TN, Terrestrial Networks) system
  • the terminal can perform cell selection and cell reselection according to the S criterion and the R criterion.
  • NTN non-terrestrial network
  • the feeder link exchange is performed.
  • the feeder link is the link between the satellite and the terrestrial gateway.
  • the satellite when the satellite exchanges the feeder link, it will lead to cell reselection of the terminal. Since the signal of the serving cell is suddenly terminated when the feeder link is switched, if the terminal only starts the measurement of the neighboring cell according to the S criterion, the terminal may not be able to perform cell reselection in time.
  • the embodiments of the present disclosure disclose a method, an apparatus, a communication device, and a storage medium for cell reselection.
  • a method for cell reselection wherein, applied to the network side, the method includes:
  • the indication information includes: service time information and effective range information; the service time information indicates the service time during which the cell provides services to the terminal; and the effective range information indicates the effective range in which the service time is effective.
  • a method for cell reselection wherein, applied to a terminal, the method includes:
  • the indication information includes: service time information and effective range information; the service time information indicates the service time during which the cell provides services to the terminal; and the effective range information indicates the effective range in which the service time is effective.
  • an apparatus for cell reselection wherein, applied to the network side, the apparatus includes a sending module; wherein,
  • the sending module is configured to send indication information
  • the indication information includes: service time information and effective range information; the service time information indicates the service time during which the cell provides services to the terminal; and the effective range information indicates the effective range in which the service time is effective.
  • an apparatus for cell reselection wherein, applied to a terminal, the apparatus includes a cell reselection module; wherein,
  • the cell reselection module is configured to: perform cell reselection according to the indication information
  • the indication information includes: service time information and effective range information; the service time information indicates the service time during which the cell provides services to the terminal; and the effective range information indicates the effective range in which the service time is effective.
  • a communication device comprising:
  • a memory for storing the processor-executable instructions
  • the processor is configured to: when executing the executable instructions, implement the method described in any embodiment of the present disclosure.
  • a computer storage medium stores a computer-executable program, and when the executable program is executed by a processor, implements the method described in any embodiment of the present disclosure.
  • indication information is sent; wherein, the indication information includes: service time information and effective range information; the service time information indicates the service time for the cell to provide services to the terminal; the effective range information indicates The effective range within which the service time is effective.
  • the indication information indicates the service time information and the effective range information. In this way, the terminal can accurately determine the service time for the cell where the terminal is located to provide services to the terminal based on the service time information and the effective range information.
  • the terminal when performing cell reselection, the terminal can perform cell reselection in time according to the service time determined by the indication information, which improves the reliability of wireless communication.
  • FIG. 1 is a schematic structural diagram of a wireless communication system.
  • Fig. 2 is a schematic diagram showing a method for switching a feeder link according to an exemplary embodiment.
  • Fig. 3 is a schematic diagram showing a method for switching a feeder link according to an exemplary embodiment.
  • Fig. 4 is a schematic diagram showing a method for switching a feeder link according to an exemplary embodiment.
  • Fig. 5 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 6 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 7 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 8 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 9 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 10 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • FIG. 11 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 12 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 13 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 14 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 15 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 16 is a schematic flowchart of a method for cell reselection according to an exemplary embodiment.
  • Fig. 17 is a schematic diagram of an apparatus for cell reselection according to an exemplary embodiment.
  • Fig. 18 is a schematic diagram of an apparatus for cell reselection according to an exemplary embodiment.
  • FIG. 19 is a schematic structural diagram of a terminal according to an exemplary embodiment.
  • Fig. 20 is a block diagram of a base station according to an exemplary embodiment.
  • first, second, third, etc. may be used in embodiments of the present disclosure to describe various pieces of information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other.
  • the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information.
  • the word "if” as used herein can be interpreted as "at the time of” or "when” or "in response to determining.”
  • the terms “greater than” or “less than” are used herein when characterizing the relationship of size. However, those skilled in the art can understand that the term “greater than” also covers the meaning of “greater than or equal to”, and “less than” also covers the meaning of "less than or equal to”.
  • FIG. 1 shows a schematic structural diagram of a wireless communication system provided by an embodiment of the present disclosure.
  • the wireless communication system is a communication system based on a mobile communication technology, and the wireless communication system may include: several user equipments 110 and several base stations 120 .
  • the user equipment 110 may be a device that provides voice and/or data connectivity to the user.
  • User equipment 110 may communicate with one or more core networks via a Radio Access Network (RAN), and user equipment 110 may be IoT user equipment such as sensor devices, mobile phones (or "cellular" phones) ) and a computer with IoT user equipment, for example, may be stationary, portable, pocket-sized, hand-held, computer-built or vehicle-mounted.
  • RAN Radio Access Network
  • IoT user equipment such as sensor devices, mobile phones (or "cellular" phones)
  • a computer with IoT user equipment for example, may be stationary, portable, pocket-sized, hand-held, computer-built or vehicle-mounted.
  • station Ses, STA
  • subscriber unit subscriber unit
  • subscriber station subscriber station
  • mobile station mobile station
  • mobile station mobile station
  • remote station remote station
  • access terminal remote user equipment
  • the user equipment 110 may also be a device of an unmanned aerial vehicle.
  • the user equipment 110 may also be an in-vehicle device, for example, a trip computer with a wireless communication function, or a wireless user equipment connected to an external trip computer.
  • the user equipment 110 may also be a roadside device, for example, may be a street light, a signal light, or other roadside devices with a wireless communication function.
  • the base station 120 may be a network-side device in a wireless communication system.
  • the wireless communication system may be a fourth generation mobile communication (the 4th generation mobile communication, 4G) system, also known as a long term evolution (Long Term Evolution, LTE) system; or, the wireless communication system may also be a 5G system, Also known as New Radio System or 5G NR System.
  • the wireless communication system may also be a next-generation system of the 5G system.
  • the access network in the 5G system can be called NG-RAN (New Generation-Radio Access Network, new generation radio access network).
  • the base station 120 may be an evolved base station (eNB) used in the 4G system.
  • the base station 120 may also be a base station (gNB) that adopts a centralized distributed architecture in a 5G system.
  • eNB evolved base station
  • gNB base station
  • the base station 120 adopts a centralized distributed architecture it usually includes a centralized unit (central unit, CU) and at least two distributed units (distributed unit, DU).
  • the centralized unit is provided with a protocol stack of a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control Protocol (Radio Link Control, RLC) layer, and a Media Access Control (Media Access Control, MAC) layer; distribution A physical (Physical, PHY) layer protocol stack is set in the unit, and the specific implementation manner of the base station 120 is not limited in this embodiment of the present disclosure.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control Protocol
  • MAC Media Access Control
  • distribution A physical (Physical, PHY) layer protocol stack is set in the unit, and the specific implementation manner of the base station 120 is not limited in this embodiment of the present disclosure.
  • a wireless connection can be established between the base station 120 and the user equipment 110 through a wireless air interface.
  • the wireless air interface is a wireless air interface based on the fourth generation mobile communication network technology (4G) standard; or, the wireless air interface is a wireless air interface based on the fifth generation mobile communication network technology (5G) standard, such as
  • the wireless air interface is a new air interface; alternatively, the wireless air interface may also be a wireless air interface based on a 5G next-generation mobile communication network technology standard.
  • an E2E (End to End, end-to-end) connection may also be established between the user equipments 110 .
  • V2V vehicle to vehicle, vehicle-to-vehicle
  • V2I vehicle to Infrastructure, vehicle-to-roadside equipment
  • V2P vehicle to pedestrian, vehicle-to-person communication in vehicle-to-everything (V2X) communication etc. scene.
  • the above-mentioned user equipment may be regarded as the terminal equipment of the following embodiments.
  • the above wireless communication system may further include a network management device 130 .
  • the network management device 130 may be a core network device in a wireless communication system, for example, the network management device 130 may be a mobility management entity (Mobility Management Entity) in an evolved packet core network (Evolved Packet Core, EPC). MME). Alternatively, the network management device may also be other core network devices, such as a serving gateway (Serving GateWay, SGW), a public data network gateway (Public Data Network GateWay, PGW), a policy and charging rules functional unit (Policy and Charging Rules) Function, PCRF) or home subscriber server (Home Subscriber Server, HSS), etc.
  • the implementation form of the network management device 130 is not limited in this embodiment of the present disclosure.
  • NTN was introduced.
  • the terminal performs cell selection or reselection according to the S criterion and the R criterion.
  • the S criterion is:
  • Srxlev is the cell selection received value
  • the terminal needs to satisfy the S criterion for cell selection or reselection.
  • the terminal may choose not to measure the co-frequency cell.
  • SIntraSearchP is used to start the RSRP signal level threshold value of the same frequency measurement
  • SIntraSearchQ is used to start the RSRQ signal quality threshold for intra-frequency measurement.
  • the terminal In response to the above conditions not being satisfied, the terminal starts to measure the neighbor cells, and then selects the target cell according to the R criterion to complete the cell reselection.
  • the R criterion is:
  • Rn Qmeas.n-Qoffset-Qoffset temp ;
  • Rs is the R value of the serving cell
  • Rn is the R value of the adjacent cell
  • Qmeas.s is the RSRP measurement value of the serving cell
  • Qmeas.n is the RSRP measurement value of the neighboring cell
  • Qhyst is the cell reselection hysteresis value
  • Qoffset temp is the temporary offset value
  • Qoffset is the offset value.
  • the satellite is connected to the ground station GW1.
  • the feeder link switching may be the switching of the satellite from being connected to the ground station GW1 to being connected to the ground station GW2.
  • the satellite may remain connected to the ground station GW1 and the ground station GW2 at the same time.
  • the terminal in the RRC idle state or inactive state start to perform cell reselection, from the cell of gNB1 to the cell of gNB2, where the cell of gNB1 is the cell corresponding to the connection between the satellite and the ground station GW1 Cell, the cell of gNB2 is the cell corresponding to when the satellite is connected to the ground station GW2.
  • the satellite completes the feeder link exchange, and the terminal completes cell reselection, from the cell of gNB1 to the cell of gNB2.
  • the terminal in the RRC idle state or the RRC inactive state needs to start cell reselection, from the cell of gNB1 to the cell of gNB2. Since the cell of gNB1 is suddenly unavailable when the feeder link is switched, if the terminal only starts the measurement of the neighboring cell according to the S criterion, the terminal may not be able to perform cell reselection in time.
  • the embodiments of the present disclosure enumerate multiple implementation manners to clearly illustrate the technical solutions of the embodiments of the present disclosure.
  • the multiple embodiments provided by the embodiments of the present disclosure may be executed independently, or may be executed together with the methods of other embodiments in the embodiments of the present disclosure, or may be executed alone or in combination and then executed together with some methods in other related technologies; this is not limited by the embodiments of the present disclosure.
  • a method for cell reselection is provided in this embodiment, wherein, applied to the network side, the method includes:
  • Step 51 sending instruction information
  • the indication information includes: service time information and effective range information; service time information, indicating the service time during which the cell provides services to the terminal; and effective range information, indicating the effective range in which the service time is effective.
  • the network side may send the indication information to the terminal.
  • the terminal may be, but is not limited to, a mobile phone, a wearable device, a vehicle-mounted terminal, a roadside unit (RSU, Road Side Unit), a smart home terminal, an industrial sensing device, and other terminals.
  • the cell may be a cell of a satellite in the NTN.
  • the satellites may be flying base stations.
  • the base station may be an access device for the terminal to access the NTN.
  • the base stations can be of various types. For example, a base station of a third generation mobile communication (3G) network, a base station of a fourth generation mobile communication (4G) network, a base station of a fifth generation mobile communication (5G) network, or other evolved base stations.
  • 3G third generation mobile communication
  • 4G fourth generation mobile communication
  • 5G fifth generation mobile communication
  • an NTN cell may be a cell with satellite coverage of the ground.
  • one satellite may correspond to at least one cell covering the ground.
  • feeder link exchanges occur while the satellite is in operation.
  • the terminal in the non-connected state in the serving cell needs to perform cell reselection.
  • this scenario embodiment is just an example, not a limitation on the application scenario of the present disclosure; that is, there may be various scenarios for triggering cell reselection, which are not limited to feeder link switching.
  • the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be the location area information.
  • the network side sends indication information to the terminal, wherein the service time information is the time information when the service is stopped to be provided to the terminal; the effective range information is the location area information.
  • the terminal acquires the location information of the terminal.
  • the time information is determined to take effect.
  • the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the location area information may be a location area identifier; wherein, the location area identifier indicates a geographic area.
  • the location area identifier is a, wherein the location area identifier a indicates the geographic area A.
  • the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be cell information.
  • the network side sends indication information to the terminal, wherein the service time information is the time information when the service is stopped to be provided to the terminal; the effective range information is cell information.
  • the serving cell in which the terminal is located is the cell indicated by the cell information, it is determined that the time information takes effect.
  • the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the cell information may be a cell identifier; wherein, the cell identifier indicates a cell.
  • the cell identifier is b, where the cell identifier b indicates cell B.
  • the cell identity may be a physical cell identity (PCI, physical cell identity) and/or a global cell identity (GCI, global cell identity).
  • the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be time period information.
  • the network side sends indication information to the terminal, wherein the service time information is the time information when the service is stopped to be provided to the terminal; and the effective range information is time period information.
  • the terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the time instant information is valid. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the time period information may be the UTC time period; the local time may be the local UTC time.
  • the time period information may be a time period identifier; wherein, the time period identifier indicates a time period. For example, the time period identifier t indicates the time period T.
  • the service time information may be system frame information when the service is stopped to be provided to the terminal; and the effective range information may be location area information.
  • the network side sends indication information to the terminal, wherein the service time information is system frame information when the service is stopped to be provided to the terminal; and the effective range information is location area information.
  • the terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.
  • the service time information may be system frame information that stops providing services to the terminal; the effective range information may be cell information.
  • the network side sends indication information to the terminal, wherein the service time information is system frame information for stopping providing services to the terminal; and the effective range information is cell information.
  • the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the system frame information is valid.
  • the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.
  • the service time information may be system frame information when the service is stopped to be provided to the terminal; the effective range information may be time period information.
  • the system frame indicated by the system frame information corresponds to a moment.
  • the network side sends indication information to the terminal, wherein the service time information is system frame information for stopping providing services to the terminal; and the effective range information is time period information.
  • the terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.
  • the service time information may be the duration information that the network side can provide services to the terminal; the effective range information may be location area information.
  • the system frame indicated by the system frame information corresponds to a moment.
  • the network side sends indication information to the terminal, wherein the service time information is the duration information that the network side can provide the terminal with; the effective range information is location area information.
  • the terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the time period information takes effect. In response to the validity of the duration information, the terminal performs neighbor cell measurement before the duration indicated by the duration information expires to complete cell reselection.
  • the service time information may be the duration information that the network side can provide services to the terminal; the effective range information may be cell information.
  • the system frame indicated by the system frame information corresponds to a moment.
  • the network side sends indication information to the terminal, wherein the service time information is the duration information that the network side can provide the terminal with; the effective range information is cell information.
  • the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the time period information takes effect.
  • the terminal performs neighbor cell measurement before the time period indicated by the time period information expires to complete cell reselection.
  • the service time information may be duration information that the network side can provide services to the terminal; the effective range information may be time period information.
  • the network side sends indication information to the terminal, wherein the service time information is the duration information that the network side can provide services to the terminal; the effective range information is time period information.
  • the terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the duration information is valid. In response to the validity of the duration information, the terminal performs neighbor cell measurement before the duration indicated by the duration information expires to complete cell reselection.
  • the service time information may be system frame information corresponding to when the network side can provide services to the terminal; the effective range information may be location area information.
  • the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame.
  • the system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time.
  • the network side sends indication information to the terminal, wherein the service time information is system frame information that the network side can provide services for the terminal; the effective range information is location area information.
  • the terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the time durations corresponding to the multiple system frames indicated by the system frame information expire in time to complete cell reselection.
  • the service time information may be system frame information when the network side can provide services to the terminal; the effective range information may be cell information.
  • the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame.
  • the system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time.
  • the network side sends indication information to the terminal, wherein the service time information is system frame information when the network side can provide services to the terminal; the effective range information is cell information.
  • the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the system frame information is valid.
  • the terminal performs neighbor cell measurement before the time duration corresponding to the multiple system frames indicated by the system frame information ends to complete cell reselection.
  • the service time information may be system frame information when the network side can provide services to the terminal; the effective range information may be time period information.
  • the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame.
  • the system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time.
  • the network side sends indication information to the terminal, wherein the service time information is system frame information when the network side can provide services to the terminal; the effective range information is time period information.
  • the terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the time duration corresponding to the multiple system frames indicated by the system frame information ends to complete cell reselection.
  • the service time information is determined according to the moment when the feeder link exchange is initiated. For example, the time when feeder link switching is started is time A, and the time before time A is determined when the network side indicated by the service time information can provide services to the terminal.
  • the service time information is determined according to the time difference between the current time and the time when the feeder link exchange is initiated.
  • the service time is a duration, and in response to the time difference being greater than the first duration threshold, the duration corresponding to the service time is greater than the second duration threshold; in response to the time difference being less than the first duration threshold, the duration corresponding to the service time is less than The second duration threshold.
  • the service time can be adapted to the time difference between the current moment and the moment when the feeder link exchange was initiated.
  • a timer for triggering cell reselection in response to the service time taking effect, is started; wherein, the timing time of the timer is less than or equal to the duration determined according to the service time.
  • cell reselection is triggered in response to the timer expiring.
  • the terminal can complete the operation of cell reselection before the NTN cell cannot provide services to the terminal, and perform cell reselection in time.
  • the NTN serving cell can provide services to the terminal within x seconds before it stops providing services to the terminal, that is, the service time is x seconds; the time indicated by the time flag of the effective range information is also the UCI time.
  • the time identifier is UCI1
  • UCI1 may indicate that the target time at which the service time x seconds takes effect is UCI1.
  • the terminal performs measurements on neighboring cells before the end of the service time x seconds to complete cell reselection.
  • the terminal in response to determining that the service time is valid according to the validity range information, can perform cell reselection based on the valid service time; in response to that the service time determined according to the valid range is not valid, the service time is not valid. service time, the terminal cannot perform cell reselection based on the ineffective service time.
  • the terminal in response to the terminal being unable to perform cell reselection based on the invalid service time, performs cell reselection based on the R criterion and the S criterion.
  • the indication information can be sent in one of the following ways:
  • the random access message is used to send the indication information.
  • the indication information may be sent at one of the following occasions:
  • the indication information is sent.
  • the indication information is sent; wherein, the indication information includes: service time information and effective range information; service time information, indicating the service time during which the cell provides services to the terminal; effective range information, indicating the effective range of the service time effective. .
  • the indication information indicates the service time information and the effective range information.
  • the terminal can accurately determine the service time for the cell where the terminal is located to provide services to the terminal based on the service time information and the effective range information.
  • the terminal can perform cell reselection in time according to the service time determined by the indication information, which improves the reliability of wireless communication.
  • the service time includes at least one of the following:
  • the time during which the cell can provide services to the terminal is the time during which the cell can provide services to the terminal.
  • time can be a moment or a duration.
  • the time when the cell stops providing services to the terminal may be time A when the cell stops providing services for the terminal.
  • the cell before time A, the cell can provide services to the terminal.
  • the time that the cell can provide the service to the terminal may be the time period x that the cell can provide the service to the cell.
  • the cell before the expiration of the duration x, the cell can provide services to the terminal.
  • the service time includes at least one of the following:
  • the length of time that the cell can provide services to the terminal is the length of time that the cell can provide services to the terminal.
  • the network side determines the time when the cell stops providing services to the terminal according to the time when the feeder link exchange is started. For example, if feeder link switching is started at time A, it can be determined that the time when the service is stopped to the terminal is time A.
  • the duration that the cell can provide services to the terminal is determined. For example, if the time difference value is a, it can be determined that the duration that the cell can provide services to the terminal is a.
  • the moment when the cell stops providing service to the terminal or the number of time periods during which the cell can provide service to the terminal is determined. For example, if N feeder link exchanges need to be performed, there may be N corresponding times when the cell stops providing services to the terminal, where N is a positive integer greater than 1. For another example, if N feeder link exchanges need to be performed, there may be N corresponding durations that the cell can provide services to the terminal.
  • the indication information includes N pieces of service time information; wherein, each service time information is associated with one piece of the effective range information.
  • the service time information includes at least one of the following:
  • the first time information includes: system frame information of the corresponding system frame when the cell stops providing services to the terminal;
  • the second time information includes: UTC time information when the cell stops providing services to the terminal;
  • the third time information includes: duration information that the cell can provide services to the terminal.
  • the system frame information may be information associated with the system frame number of the system frame.
  • system frame information includes one of the following:
  • the starting system frame number and the offset relative to the starting system frame number are the starting system frame number and the offset relative to the starting system frame number.
  • the system frame number of the system frame is the system frame number when the service is stopped for the terminal.
  • the terminal can determine the time when the cell stops providing services to the terminal according to the system frame number. For example, if the time corresponding to the system frame number is time A, then at time A, the cell stops providing services to the terminal.
  • the system frame number corresponding to the time period in which the cell can provide services to the terminal may be determined according to the starting system frame number and the offset relative to the starting system frame number. In this way, the time period during which the cell can provide services to the terminal can be determined based on the determined system frame number.
  • the system frame number at which the cell stops providing services to the terminal is determined according to the start time point of the feeder link exchange.
  • the starting system frame number and the offset relative to the starting system frame number are determined according to the start time point of the feeder link exchange.
  • the starting system frame corresponding to the starting system frame number and the system frame determined according to the offset are the system frames sent before the starting time point.
  • the time information includes at least one of the following:
  • the UTC time information is the UTC time information when the service is stopped for the terminal.
  • the UTC duration information is time difference information between the current UTC time and the start UTC time exchanged by the feeder link.
  • the system frame number corresponding to the time period in which the service can be provided may be determined according to the starting system frame number and the offset relative to the starting system frame number.
  • the duration information is determined according to the start time point of the feeder link exchange.
  • the duration indicated by the duration information may be x seconds before A, and the service time information carries information of x seconds.
  • the duration information may be UTC duration information.
  • the effective scope information includes at least one of the following:
  • location area identification information indicating a geographic area
  • Time identification information indicating a time period and/or time; wherein, in response to the local time obtained by the terminal being within the time period indicated by the time identification information and/or the local time obtained by the terminal being the time indicated by the time identification information, the service time take effect;
  • the cell identification information indicates the serving cell; wherein, in response to the terminal being in the serving cell indicated by the cell identification information, the service time takes effect.
  • the service time is valid in response to the terminal being in the geographic area indicated by the location area identification information.
  • the terminal may perform cell reselection based on service time.
  • the terminal in response to the terminal being located in the geographic area indicated by the location area identification information, it is determined that the time information corresponding to the service time takes effect. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the geographic area may be an area composed of latitude and longitude on the earth.
  • the geographic area may be an area indicated by a reference point and a reference distance.
  • a geographic area can be a circular area with point A as the center and R as the radius.
  • the area may be the area covered by satellite signals when the satellite performs feeder link switching.
  • the terminal in response to the local time obtained by the terminal being within the time period indicated by the time identification information or the time indicated by the time identification information, it is determined that the service time takes effect.
  • the terminal may perform cell reselection based on service time.
  • the terminal obtains the local time. In response to the local time being within the time period indicated by the time identification information, it is determined that the time information corresponding to the service time is valid. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the time period information may be the UTC time period; the local time may be the local UTC time.
  • the time period indicated by the time identification information may include a start time and an end time.
  • the time period indicated by the time identification information may be represented by UTC time.
  • the terminal in response to the terminal being in the serving cell indicated by the cell identification information, it is determined that the service time takes effect.
  • the terminal may perform cell reselection based on service time.
  • the terminal in response to the serving cell in which the terminal is located is a cell indicated by the cell identification information, determining that the time information takes effect. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the cell identity may be PCI or GCI.
  • a method for cell reselection is provided in this embodiment, wherein, applied to the network side, the method includes:
  • Step 61 Determine the geographic area according to the geographic area covered by the satellite signal when the feeder link is exchanged.
  • the geographic area covered by the satellite signal when the feeder link is exchanged may be the geographic area covered by the satellite signal within a predetermined time range before the feeder link exchange is performed. For example, the geographic area covered by the satellite signal in the 3 seconds before the feeder link exchange is performed.
  • the determined geographic area is the geographic area indicated in the effective range information.
  • the ground area is pre-divided into a plurality of geographic areas.
  • the ground area is pre-divided into area A, area B, and area C.
  • the geographic areas covered by the satellite signals are area B and area C, then the geographic areas may be determined as area B and area C.
  • this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:
  • Step 71 Determine the time period indicated by the time identification information according to the time period at which the feeder link is exchanged; or, determine the time indicated by the time identification information according to the time at which the feeder link is exchanged.
  • the period during which the feeder link is switched is the A period, and then the B period before the A period may be determined as the time period indicated by the time identification information.
  • the terminal needs to complete the cell reselection before the end of the B period.
  • the time period in which the feeder link is exchanged is time A, then it can be determined that time A is the time indicated by the time identification information.
  • the terminal needs to complete the cell reselection before time A.
  • the number of time periods and/or moments indicated by the time identification information may be determined according to the number of feeder link exchanges.
  • N is a positive integer greater than 1.
  • different feeder link exchanges correspond to different time periods and/or times.
  • this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:
  • Step 81 Determine the identity of the serving cell according to the cell identity of the cell covered by the signal when the feeder link is exchanged.
  • the cell identifier of the cell covered by the satellite signal when the feeder link is exchanged may be the cell identifier of the cell covered by the satellite signal within a predetermined time range before the feeder link exchange is performed. For example, the cell identity of the cell covered by the satellite signal within 3 seconds before the feeder link exchange is performed.
  • the cells covered by the satellite when the feeder links are exchanged may be multiple cells.
  • the plurality of cells may be A cell, B cell and C cell.
  • the cells covered by the satellites during the feeder link exchange are the B cell and the D cell
  • the identifiers of the serving cells can be determined to be the identifier of the B cell and the identifier of the D cell.
  • this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:
  • Step 91 Determine the service time indicated by the service time information according to the time difference between the current time and the time when the feeder link exchange is started.
  • the duration corresponding to the service time in response to the time difference being greater than the first duration threshold, is greater than the second duration threshold; in response to the time difference being less than the first duration threshold, the duration corresponding to the service time is less than the second duration threshold. In this way, the service time can be adapted to the time difference between the current moment and the moment when the feeder link exchange was initiated.
  • the current time is time A; the time when feeder link switching is started is time B, and the service time may be the duration from time A to time B.
  • multiple feeder link exchanges are included during the operational cycle of the satellite.
  • different feeder link exchanges determine different service times.
  • the service time corresponding to the first feeder link exchange is the first service time; the service time corresponding to the second feeder link exchange is the second service time.
  • the indication information includes a plurality of service time information; wherein, each service time information is associated with one valid range information.
  • the amount of service time information is determined based on the number of feeder link exchanges.
  • the quantity of service time information in response to the number of feeder link exchanges being greater than the number threshold, is greater than the quantity threshold; in response to the number of feeder link exchanges being less than the number threshold, the quantity of service time information is less than the quantity threshold.
  • each feeder link exchange corresponds to a piece of service time information and validity range information.
  • this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:
  • Step 101 Send a system message carrying indication information; or, send an RRC message carrying indication information; or, send a random access message carrying indication information.
  • the network side sends a system message carrying indication information to the terminal in the disconnected state.
  • the network side in response to the terminal establishing an RRC connection with the network side, the network side sends an RRC message carrying indication information.
  • the network side sends a random access message carrying indication information.
  • the indication information is carried in the system message, the RRC message or the random access message, which can improve the compatibility of the message.
  • this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:
  • Step 111 in response to sending the indication information through the system message, update the indication information when the feeder link is exchanged.
  • the network side sends a system message carrying indication information to the terminal in the disconnected state.
  • the disconnected state includes an idle state and an inactive state.
  • the indication information is updated each time a feeder link exchange occurs.
  • the updating system message may be updating the service time carried in the system message.
  • this embodiment provides a method for cell reselection, wherein, applied to the network side, the method includes:
  • Step 121 In response to the system message carrying the instruction information corresponding to the single switch of the feeder link, update the instruction information each time the feeder link is exchanged; or, in response to the system message carrying the instruction information corresponding to the multiple switching of the feeder link, The indication information is updated when feeder link exchanges other than multiple feeder link exchanges are performed.
  • the satellite requires multiple feeder link exchanges during its operating cycle.
  • a single exchange may correspond to each of a plurality of feeder link exchanges during the satellite's operating cycle.
  • the multiple exchanges may correspond to at least two feeder link exchanges among the N feeder link exchanges in the satellite's operating cycle.
  • the update indication information may be: update the service time information in the system message and/or update the validity range information in the system message.
  • this embodiment provides a method for cell reselection, which is applied to a terminal, and the method includes:
  • Step 131 Perform cell reselection according to the indication information
  • the indication information includes: service time information and effective range information; service time information, indicating the service time during which the cell provides services to the terminal; and effective range information, indicating the effective range in which the service time is effective.
  • the network side may send the indication information to the terminal.
  • the terminal may be, but is not limited to, a mobile phone, a wearable device, a vehicle-mounted terminal, a roadside unit (RSU, Road Side Unit), a smart home terminal, an industrial sensing device, and other terminals.
  • a mobile phone a wearable device
  • vehicle-mounted terminal a vehicle-mounted terminal
  • RSU Road Side Unit
  • smart home terminal an industrial sensing device, and other terminals.
  • the cell may be a cell of a satellite in the NTN.
  • the satellites may be flying base stations.
  • the base station may be an access device for the terminal to access the NTN.
  • the base stations can be of various types. For example, a base station of a third generation mobile communication (3G) network, a base station of a fourth generation mobile communication (4G) network, a base station of a fifth generation mobile communication (5G) network, or other evolved base stations.
  • 3G third generation mobile communication
  • 4G fourth generation mobile communication
  • 5G fifth generation mobile communication
  • an NTN cell may be a cell with satellite coverage of the ground.
  • one satellite may correspond to at least one cell covering the ground.
  • feeder link exchanges occur while the satellite is in operation.
  • the terminal in the non-connected state in the serving cell needs to perform cell reselection.
  • this scenario embodiment is only an example, and is not intended to limit the application scenario of the present disclosure; that is, there may be various scenarios for triggering cell reselection, and it is not limited to feeder link switching.
  • the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be the location area information.
  • the terminal receives the indication information sent by the network side, wherein the service time information is the time information when the service is stopped to the terminal; the effective range information is the location area information.
  • the terminal acquires the location information of the terminal.
  • the time information is determined to take effect.
  • the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the location area information may be a location area identifier; wherein, the location area identifier indicates a geographic area.
  • the location area identifier is a, wherein the location area identifier a indicates the geographic area A.
  • the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be cell information.
  • the terminal receives the indication information sent by the network side, wherein the service time information is the time information when the service is stopped to the terminal; the effective range information is cell information.
  • the serving cell in which the terminal is located is the cell indicated by the cell information, it is determined that the time information takes effect.
  • the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the cell information may be a cell identifier; wherein, the cell identifier indicates a cell.
  • the cell identifier is b, where the cell identifier b indicates cell B.
  • the cell identity may be PCI and/or GCI.
  • the service time information may be the time information when the service is stopped to be provided to the terminal; the effective range information may be time period information.
  • the terminal receives the indication information sent by the network side, wherein the service time information is the time information when the service is stopped to be provided to the terminal; the effective range information is the time period information.
  • the terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the time instant information is valid. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the time period information may be the UTC time period; the local time may be the local UTC time.
  • the time period information may be a time period identifier; wherein, the time period identifier indicates a time period. For example, the time period identifier t indicates the time period T.
  • the service time information may be system frame information when the service is stopped to be provided to the terminal; and the effective range information may be location area information.
  • the terminal receives the indication information sent by the network side, wherein the service time information is the system frame information when the service is stopped to the terminal; the effective range information is the location area information.
  • the terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.
  • the service time information may be system frame information that stops providing services to the terminal; the effective range information may be cell information.
  • the terminal receives the indication information sent by the network side, wherein the service time information is system frame information that stops providing services to the terminal; and the effective range information is cell information.
  • the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the system frame information is valid.
  • the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.
  • the service time information may be system frame information when the service is stopped to be provided to the terminal; the effective range information may be time period information.
  • the system frame indicated by the system frame information corresponds to a moment.
  • the terminal receives the indication information sent by the network side, wherein the service time information is system frame information for stopping providing services to the terminal; and the effective range information is time period information.
  • the terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurement before the system frame indicated by the system frame information to complete cell reselection.
  • the service time information may be the duration information that the network side can provide services to the terminal; the effective range information may be location area information.
  • the system frame indicated by the system frame information corresponds to a moment.
  • the terminal receives the indication information sent by the network side, wherein the service time information is the duration information that the network side can provide the terminal with; the effective range information is the location area information.
  • the terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the time period information takes effect. In response to the validity of the duration information, the terminal performs neighbor cell measurement before the duration indicated by the duration information expires to complete cell reselection.
  • the service time information may be the duration information that the network side can provide services to the terminal; the effective range information may be cell information.
  • the system frame indicated by the system frame information corresponds to a moment.
  • the terminal receives the indication information sent by the network side, wherein the service time information is the time length information that the network side can provide the terminal with; the effective range information is cell information.
  • the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the time period information takes effect.
  • the terminal performs neighbor cell measurement before the time period indicated by the time period information expires to complete cell reselection.
  • the service time information may be duration information that the network side can provide services to the terminal; the effective range information may be time period information.
  • the terminal receives the indication information sent by the network side, wherein the service time information is the duration information that the network side can provide the terminal with; the effective range information is time period information.
  • the terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the duration information is valid. In response to the validity of the duration information, the terminal performs neighbor cell measurement before the duration indicated by the duration information expires to complete cell reselection.
  • the service time information may be system frame information corresponding to when the network side can provide services to the terminal; the effective range information may be location area information.
  • the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame.
  • the system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time.
  • the terminal receives the indication information sent by the network side, wherein the service time information is system frame information that the network side can provide services to the terminal; the effective range information is location area information.
  • the terminal acquires the location information of the terminal. In response to the terminal being located in the geographic area indicated by the location area information, it is determined that the system frame information is valid. In response to the system frame information taking effect, the terminal performs neighbor cell measurements before the time periods corresponding to multiple system frames indicated by the system frame information expire in time to complete cell reselection.
  • the service time information may be system frame information when the network side can provide services to the terminal; the effective range information may be cell information.
  • the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame.
  • the system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time.
  • the terminal receives the indication information sent by the network side, wherein the service time information is system frame information when the network side can provide services to the terminal; the effective range information is cell information.
  • the serving cell where the terminal is located is the cell indicated by the cell information, it is determined that the system frame information is valid.
  • the terminal performs neighbor cell measurement before the time duration corresponding to the multiple system frames indicated by the system frame information ends to complete cell reselection.
  • the service time information may be system frame information when the network side can provide services to the terminal; the effective range information may be time period information.
  • the system frame information includes the system frame number of the starting system frame and the offset relative to the system frame number of the starting system frame.
  • the system frame information may indicate a plurality of system frames. Multiple system frames may correspond to a period of time.
  • the terminal receives the indication information sent by the network side, wherein the service time information is system frame information when the network side can provide services to the terminal; the effective range information is time period information.
  • the terminal gets the local time. In response to the local time being within the time period indicated by the time period information, it is determined that the system frame information is valid.
  • the terminal performs neighbor cell measurement before the time duration corresponding to the multiple system frames indicated by the system frame information ends to complete cell reselection.
  • the network side determines the service time information according to the moment when the feeder link switching is started. For example, the time when feeder link switching is started is time A, and the time before time A is determined when the network side indicated by the service time information can provide services to the terminal.
  • the network side determines the service time information according to the time difference between the current moment and the moment when the feeder link switching is started.
  • the service time is the duration, and in response to the time difference being greater than the first duration threshold, the duration corresponding to the service time is greater than the second duration threshold; in response to the time difference being less than the first duration threshold, the duration corresponding to the service time is less than The second duration threshold.
  • the service time can be adapted to the time difference between the current moment and the moment when the feeder link exchange was initiated.
  • the terminal in response to the service time taking effect, starts a timer for triggering cell reselection; wherein, the timing time of the timer is less than or equal to the duration determined according to the service time.
  • cell reselection is triggered.
  • the terminal can complete the operation of cell reselection before the NTN cell cannot provide services to the terminal, and perform cell reselection in time.
  • the NTN serving cell can provide services to the terminal within x seconds before it stops providing services to the terminal, that is, the service time is x seconds; the time indicated by the time flag of the effective range information is also the UCI time.
  • the time identifier is UCI1
  • UCI1 may indicate that the target time at which the service time x seconds takes effect is UCI1.
  • the terminal performs measurements on neighboring cells before the end of the service time x seconds to complete cell reselection.
  • the terminal in response to determining that the service time is valid according to the validity range information, can perform cell reselection based on the valid service time; in response to the service time determined according to the valid range being invalid, the service time is not valid. service time, the terminal cannot perform cell reselection based on the ineffective service time.
  • the terminal in response to the terminal being unable to perform cell reselection based on the invalid service time, performs cell reselection based on the R criterion and the S criterion.
  • the network side can pre-determine the service time.
  • Information and Effective Scope Information are fixed, the time when the corresponding cell cannot provide service to the terminal when the network exchanges the feeder link is determined. Therefore, the network side can pre-determine the service time.
  • the indication information can be received in one of the following ways:
  • the random access message is used to receive the indication information.
  • the indication information may be received at one of the following occasions:
  • the indication information sent by the network side for the request information sent by the terminal is received.
  • the indication information is sent; wherein, the indication information includes: service time information and effective range information; service time information, indicating the service time during which the cell provides services to the terminal; effective range information, indicating the effective range of the service time effective. .
  • the indication information indicates the service time information and the effective range information.
  • the terminal can accurately determine the service time for the cell where the terminal is located to provide services to the terminal based on the service time information and the effective range information.
  • the terminal can perform cell reselection in time according to the service time determined by the indication information, which improves the reliability of wireless communication.
  • the indication information includes one of the following:
  • the indication information is stored in a storage area of the terminal.
  • the indication information is stored in a Universal Subscriber Identity Module (USIM, Universal Subscriber Identity Module) of the terminal.
  • USB Universal Subscriber Identity Module
  • the indication information is stored in an embedded global subscriber identity card (eSIM, embedded-SIM).
  • eSIM embedded global subscriber identity card
  • the service time includes at least one of the following:
  • the time during which the cell can provide services to the terminal is the time during which the cell can provide services to the terminal.
  • time can be a moment or a duration.
  • the time when the cell stops providing services to the terminal may be time A when the cell stops providing services for the terminal.
  • the cell before time A, the cell can provide services to the terminal.
  • the time that the cell can provide the service to the terminal may be the time period x that the cell can provide the service to the cell.
  • the cell can provide services to the terminal before the time duration x expires.
  • the service time includes at least one of the following:
  • the length of time that the cell can provide services to the terminal is the length of time that the cell can provide services to the terminal.
  • the network side determines the time when the cell stops providing services to the terminal according to the time when the feeder link exchange is started. For example, if feeder link switching is started at time A, it can be determined that the time when the service is stopped to the terminal is time A.
  • the network side determines the duration that the cell can provide services to the terminal according to the time difference between the current moment and the moment when the feeder link exchange is started. For example, if the time difference value is a, it can be determined that the duration that the cell can provide services to the terminal is a.
  • the network side determines, according to the number of feeder link exchanges, the moment when the cell stops providing services to the terminal or the number of time periods during which the cell can provide services to the terminal. For example, if N times of feeder link switching are required, there may be N corresponding times when the cell stops providing services to the terminal, where N is a positive integer greater than 1. For another example, if N feeder link exchanges need to be performed, there may be N corresponding durations that the cell can provide services to the terminal.
  • the indication information includes N pieces of service time information; wherein, each service time information is associated with one piece of the effective range information.
  • the service time information includes at least one of the following:
  • the first time information includes: system frame information of the corresponding system frame when the cell stops providing services to the terminal;
  • the second time information includes: UTC time information when the cell stops providing services to the terminal;
  • the third time information includes: duration information that the cell can provide services to the terminal.
  • the system frame information may be information associated with the system frame number of the system frame.
  • system frame information includes one of the following:
  • the starting system frame number and the offset relative to the starting system frame number are the starting system frame number and the offset relative to the starting system frame number.
  • the system frame number of the system frame is the system frame number when the service is stopped for the terminal.
  • the terminal can determine the time when the cell stops providing services to the terminal according to the system frame number. For example, if the time corresponding to the system frame number is time A, then at time A, the cell stops providing services to the terminal.
  • the system frame number corresponding to the time period in which the cell can provide services to the terminal may be determined according to the starting system frame number and the offset relative to the starting system frame number. In this way, the time period during which the cell can provide services to the terminal can be determined based on the determined system frame number.
  • the system frame number at which the cell stops providing services to the terminal is determined according to the start time point of the feeder link exchange.
  • the starting system frame number and the offset relative to the starting system frame number are determined according to the start time point of the feeder link exchange.
  • the starting system frame corresponding to the starting system frame number and the system frame determined according to the offset are the system frames sent before the starting time point.
  • the time information includes at least one of the following:
  • the UTC time information is the UTC time information when the service is stopped for the terminal.
  • the UTC duration information is time difference information between the current UTC time and the start UTC time exchanged by the feeder link.
  • the system frame number corresponding to the time period in which the service can be provided may be determined according to the starting system frame number and the offset relative to the starting system frame number.
  • the duration information is determined according to the start time point of the feeder link exchange.
  • the duration indicated by the duration information may be x seconds before A, and the service time information carries information of x seconds.
  • the duration information may be UTC duration information.
  • the effective scope information includes at least one of the following:
  • location area identification information indicating a geographic area
  • Time identification information indicating a time period and/or time; wherein, in response to the local time obtained by the terminal being within the time period indicated by the time identification information and/or the local time obtained by the terminal being the time indicated by the time identification information, the service time take effect;
  • the cell identification information indicates the serving cell; wherein, in response to the terminal being in the serving cell indicated by the cell identification information, the service time takes effect.
  • the service time is valid in response to the terminal being in the geographic area indicated by the location area identification information.
  • the terminal may perform cell reselection based on service time.
  • the terminal in response to the terminal being located in the geographic area indicated by the location area identification information, it is determined that the time information corresponding to the service time takes effect. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the geographic area may be an area composed of latitude and longitude on the earth.
  • the geographic area may be an area indicated by a reference point and a reference distance.
  • a geographic area can be a circular area with point A as the center and R as the radius.
  • the area may be the area covered by satellite signals when the satellite performs feeder link switching.
  • the terminal may perform cell reselection based on service time.
  • the terminal obtains the local time. In response to the local time being within the time period indicated by the time identification information, it is determined that the time information corresponding to the service time is valid. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the time period information may be the UTC time period; the local time may be the local UTC time.
  • the time period indicated by the time identification information may include a start time and an end time.
  • the time period indicated by the time identification information may be represented by UTC time.
  • the terminal in response to the terminal being in the serving cell indicated by the cell identification information, it is determined that the service time takes effect.
  • the terminal may perform cell reselection based on service time.
  • the terminal in response to the serving cell in which the terminal is located is a cell indicated by the cell identification information, determining that the time information takes effect. In response to the time information taking effect, the terminal performs neighbor cell measurement before the time indicated by the time information to complete cell reselection.
  • the cell identity may be PCI or GCI.
  • this embodiment provides a method for cell reselection, which is applied to a terminal, and the method includes:
  • Step 141 in response to determining that the service time is valid according to the indication information, perform cell reselection before the time indicated by the service time information to stop providing services to the terminal; or, in response to determining that the service time is invalid according to the indication information, based on the R criterion and the S criterion. Perform cell reselection.
  • determining that the service time is valid in response to the terminal being in the geographic area indicated by the location area identification information determining that the service time is valid in response to the terminal being in the geographic area indicated by the location area identification information.
  • the geographic area indicated by the location area identification information is in the circular area A with the reference point o as the center.
  • the service time takes effect.
  • the service time is valid in response to the local time obtained by the terminal being within the time period indicated by the time identification information.
  • the time period indicated by the time identification information is the A period
  • the terminal obtains the local time, and when the obtained local time is within the A period, it is determined that the service time takes effect.
  • the cell indicated by the cell identification information is the A cell
  • the serving cell where the terminal is located is also the A cell, and it is determined that the service time takes effect.
  • a method for cell reselection is provided in this embodiment, wherein, applied to a terminal, the method includes:
  • Step 151 in response to the terminal being in the geographic area indicated by the location area identification information, determine that the service time is effective; and/or, in response to the local time obtained by the terminal being within the time period indicated by the time identification information, determine that the service time is effective; and/or , in response to that the current serving cell acquired by the terminal is the serving cell indicated by the cell identification information, it is determined that the service time takes effect.
  • the terminal acquires its own location information, and determines whether the terminal is located in the geographic area indicated by the location area identification information; in response to the terminal being located in the geographic area, it is determined that the service time is effective.
  • the terminal acquiring the local UTC time may acquire the local UTC time through a system message block (SIB9).
  • SIB9 system message block
  • the terminal determines whether the local UTC time is within the time period indicated by the time identification information, and if it is within the time period, determines that the service time is valid.
  • the terminal acquires the cell identity of the current serving cell, for example, PCI and/or GCI.
  • the service time is valid in response to the identification of the serving cell of the terminal being the same as the cell identification information indicating that the cell identification is the same.
  • the terminal based on the effective service time, performs neighbor cell measurement and completes cell reselection before the time when the network side stops providing services to the terminal.
  • the service time is time A when the service is stopped for the terminal; the effective range information is location area identification information, and the geographic area indicated by the location area identification information is area a.
  • the terminal acquires the location information of the terminal. In response to the terminal being located in the area a, it is determined that the service time A takes effect at the moment. After time A takes effect, the terminal performs neighbor cell measurement before time A to complete cell reselection.
  • the service time is the corresponding system frame number A when the service is stopped to the terminal;
  • the valid range information is time identification information, and the time period indicated by the time identification information is the a period.
  • the terminal obtains the time b of the local UTC time, and determines that the frame number A of the service time system takes effect in response to the obtained time b of the local UTC time within the period a. After the system frame number A takes effect, the terminal performs neighbor cell measurement before the system frame number A to complete cell reselection.
  • the service time is time A when the service is stopped for the terminal; the effective range information is cell identification information, and the cell indicated by the cell identification information is cell a.
  • the service time A takes effect at the moment. After time A takes effect, the terminal performs neighbor cell measurement before time A to complete cell reselection.
  • this embodiment provides a method for cell reselection, which is applied to a terminal, and the method includes:
  • Step 161 Receive a system message carrying indication information; or, receive a radio resource control RRC message carrying indication information; or, receive a random access message carrying indication information.
  • a terminal in a disconnected state receives a system message that carries indication information and is sent by the network side.
  • the terminal receives an RRC message carrying indication information after the terminal establishes an RRC connection with the network side.
  • the terminal receives a random access message carrying indication information.
  • the indication information is carried in the system message, the RRC message or the random access message, which can improve the compatibility of the message.
  • Example 1 The service time is UTC time, assuming that the satellite circles the earth once and the number of feeder link exchanges is 5, it corresponds to 5 service times, and each switching time corresponds to an effective area on the earth.
  • Service time information including the service time.
  • Effective range information including the effective area. This can be indicated by a valid flag. For example, indicated by Area1, Area 2, Area 3, Area 4 and Area 5.
  • UTC1 time information
  • Area 1 valid identification
  • UTC2 time information
  • Area 2 valid identification
  • UTC3 time information
  • Area 3 valid identification
  • UTC4 time information
  • Area 4 valid identification
  • UTC5 time information
  • Area 5 valid identification
  • the method includes:
  • Step a the network side sends indication information to the terminal through a system message
  • the indication information includes: service time information and effective range information; service time information, indicating the service time during which the cell provides services to the terminal; and effective range information, indicating the effective range in which the service time is effective.
  • Step b After the terminal receives the indication information, obtain the location information of the terminal.
  • Step c if the terminal is located in one of the above-mentioned 5 areas indicated by the effective identification, for example, in area 2, it is determined that the time when the current serving cell stops providing services to the terminal is UTC2, and the terminal needs to start the adjacent cell before the time of UTC2. measurement and complete cell reselection.
  • Step d if the location of the terminal is not in one of the above-mentioned 5 areas indicated by the effective identification, the time information that any of the above-mentioned cells stops providing services to the terminal is not applied. At this time, if the terminal needs to perform cell reselection, the S criterion is used. and R criterion for cell reselection.
  • an apparatus for cell reselection provided in an embodiment of the present disclosure, wherein, applied to the network side, the apparatus includes a sending module 171; wherein,
  • a sending module 171 configured to send indication information
  • the indication information includes: service time information and effective range information; service time information, indicating the service time during which the cell provides services to the terminal; and effective range information, indicating the effective range in which the service time is effective.
  • an embodiment of the present disclosure provides an apparatus for cell reselection, which is applied to a terminal, and an apparatus includes a cell reselection module 181; wherein,
  • the cell reselection module 181 is configured to: perform cell reselection according to the indication information;
  • the indication information includes: service time information and effective range information; service time information, indicating the service time during which the cell provides services to the terminal; and effective range information, indicating the effective range in which the service time is effective.
  • Embodiments of the present disclosure provide a communication device, the communication device includes:
  • memory for storing processor-executable instructions
  • the processor is configured to, when executing the executable instructions, implement the method applied to any embodiment of the present disclosure.
  • the processor may include various types of storage media, which are non-transitory computer storage media that can continue to memorize and store information on the communication device after the power is turned off.
  • the processor can be connected to the memory through a bus or the like, and is used to read the executable program stored on the memory.
  • Embodiments of the present disclosure further provide a computer storage medium, wherein the computer storage medium stores a computer-executable program, and when the executable program is executed by a processor, implements the method of any embodiment of the present disclosure.
  • an embodiment of the present disclosure provides a structure of a terminal.
  • this embodiment provides a terminal 800, which may be a mobile phone, a computer, a digital broadcasting terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc. .
  • the terminal 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input/output (I/O) interface 812, a sensor component 814, and communication component 816.
  • the processing component 802 generally controls the overall operations of the terminal 800, such as operations associated with display, phone calls, data communications, camera operations, and recording operations.
  • the processing component 802 can include one or more processors 820 to execute instructions to perform all or some of the steps of the methods described above.
  • processing component 802 may include one or more modules that facilitate interaction between processing component 802 and other components.
  • processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.
  • Memory 804 is configured to store various types of data to support operation at device 800 . Examples of such data include instructions for any application or method operating on the terminal 800, contact data, phonebook data, messages, pictures, videos, and the like. Memory 804 may be implemented by any type of volatile or nonvolatile storage device or combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read only memory
  • EPROM erasable Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Magnetic or Optical Disk Magnetic Disk
  • Power supply assembly 806 provides power to various components of terminal 800 .
  • Power supply components 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to terminal 800 .
  • Multimedia component 808 includes screens that provide an output interface between terminal 800 and the user.
  • the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user.
  • the touch panel includes one or more touch sensors to sense touch, swipe, and gestures on the touch panel. A touch sensor can sense not only the boundaries of a touch or swipe action, but also the duration and pressure associated with the touch or swipe action.
  • the multimedia component 808 includes a front-facing camera and/or a rear-facing camera. When the device 800 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each of the front and rear cameras can be a fixed optical lens system or have focal length and optical zoom capability.
  • Audio component 810 is configured to output and/or input audio signals.
  • the audio component 810 includes a microphone (MIC) that is configured to receive external audio signals when the terminal 800 is in an operating mode, such as a calling mode, a recording mode, and a voice recognition mode.
  • the received audio signal may be further stored in memory 804 or transmitted via communication component 816 .
  • audio component 810 also includes a speaker for outputting audio signals.
  • the I/O interface 812 provides an interface between the processing component 802 and a peripheral interface module, which may be a keyboard, a click wheel, a button, or the like. These buttons may include, but are not limited to: home button, volume buttons, start button, and lock button.
  • Sensor assembly 814 includes one or more sensors for providing various aspects of the status assessment of terminal 800 .
  • the sensor component 814 can detect the open/closed state of the device 800, the relative positioning of components, such as the display and keypad of the terminal 800, the sensor component 814 can also detect the position change of the terminal 800 or a component of the terminal 800, the user The presence or absence of contact with the terminal 800, the orientation or acceleration/deceleration of the terminal 800 and the temperature change of the terminal 800.
  • Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects in the absence of any physical contact.
  • Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor assembly 814 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
  • Communication component 816 is configured to facilitate wired or wireless communication between terminal 800 and other devices.
  • the terminal 800 can access a wireless network based on a communication standard, such as Wi-Fi, 2G or 3G, or a combination thereof.
  • the communication component 816 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel.
  • the communication component 816 also includes a near field communication (NFC) module to facilitate short-range communication.
  • NFC near field communication
  • the NFC module may be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.
  • RFID radio frequency identification
  • IrDA infrared data association
  • UWB ultra-wideband
  • Bluetooth Bluetooth
  • terminal 800 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable A gate array (FPGA), controller, microcontroller, microprocessor or other electronic component implementation is used to perform the above method.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGA field programmable A gate array
  • controller microcontroller, microprocessor or other electronic component implementation is used to perform the above method.
  • non-transitory computer-readable storage medium including instructions, such as a memory 804 including instructions, which are executable by the processor 820 of the terminal 800 to perform the above method.
  • the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.
  • an embodiment of the present disclosure shows a structure of a base station.
  • the base station 900 may be provided as a network-side device.
  • the base station 900 includes a processing component 922, which further includes one or more processors, and a memory resource represented by memory 932 for storing instructions executable by the processing component 922, such as application programs.
  • An application program stored in memory 932 may include one or more modules, each corresponding to a set of instructions.
  • the processing component 922 is configured to execute instructions to perform any of the aforementioned methods applied to the base station.
  • the base station 900 may also include a power supply assembly 926 configured to perform power management of the base station 900, a wired or wireless network interface 950 configured to connect the base station 900 to a network, and an input output (I/O) interface 958.
  • Base station 900 may operate based on an operating system stored in memory 932, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM or the like.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente divulgation concernent un procédé de resélection de cellule, appliqué à un côté réseau. Le procédé fait appel aux étapes suivantes : l'envoi d'informations d'indication, les informations d'indication comprenant des informations de temps de service et des informations de plage efficace, les informations de temps de service indiquant un temps de service lorsqu'une cellule fournit un service à un terminal, et les informations de plage efficace indiquant une plage efficace dans laquelle le temps de service est efficace.
PCT/CN2021/070169 2021-01-04 2021-01-04 Procédé et appareil de resélection de cellule, dispositif de communication, et support de stockage WO2022141639A1 (fr)

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PCT/CN2021/070169 WO2022141639A1 (fr) 2021-01-04 2021-01-04 Procédé et appareil de resélection de cellule, dispositif de communication, et support de stockage
CN202180000151.5A CN115039445B (zh) 2021-01-04 2021-01-04 小区重选的方法、装置、通信设备及存储介质
CN202311396727.1A CN117460008A (zh) 2021-01-04 2021-01-04 小区重选的方法、装置、通信设备及存储介质

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