WO2021147004A1 - 一种小区搜索方法及终端 - Google Patents

一种小区搜索方法及终端 Download PDF

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Publication number
WO2021147004A1
WO2021147004A1 PCT/CN2020/073833 CN2020073833W WO2021147004A1 WO 2021147004 A1 WO2021147004 A1 WO 2021147004A1 CN 2020073833 W CN2020073833 W CN 2020073833W WO 2021147004 A1 WO2021147004 A1 WO 2021147004A1
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WIPO (PCT)
Prior art keywords
terminal
cell
candidate cell
ephemeris information
candidate
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PCT/CN2020/073833
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English (en)
French (fr)
Inventor
王淑坤
李海涛
尤心
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to CN202080075186.0A priority Critical patent/CN114600506B/zh
Priority to PCT/CN2020/073833 priority patent/WO2021147004A1/zh
Publication of WO2021147004A1 publication Critical patent/WO2021147004A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information

Definitions

  • the present invention relates to the field of communications, and in particular to a cell search method, terminal, chip, computer-readable storage medium, computer program product, and computer program.
  • the terminal when the terminal is in the RRC connected state but a handover fails, or a radio link fails, or integrity protection fails, or RRC reconfiguration fails, the terminal is triggered to perform a cell search and initiate a search in the target cell. RRC connection re-establishment process.
  • NTN Non-Terrestrial Network
  • NTN generally uses satellite communication to provide communication services to ground users.
  • the cell detected by the terminal is mobile, it is not stationary like a traditional cell; at the same time, the air interface transmission delay in satellite communication is relatively large, so the RRC connection reconstruction delay is also Will be relatively large. Therefore, if the same method as in the related technology is used for cell search, the problem of long service interruption delay may occur.
  • embodiments of the present invention provide a cell search method, terminal, chip, computer-readable storage medium, computer program product, and computer program.
  • a cell search method including:
  • the terminal is in a radio resource control RRC connection state, and if the first preset condition is met, the terminal searches for the target cell according to the ephemeris information;
  • the terminal initiates an RRC connection re-establishment process to the target communication device of the target cell.
  • a terminal including:
  • the communication unit is in the radio resource control RRC connection state, and when the first preset condition is met, searches for the target cell according to the ephemeris information; initiates the RRC connection reestablishment process to the target communication device of the target cell.
  • a terminal including: a processor and a memory for storing a computer program that can run on the processor,
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the steps of the aforementioned method.
  • a chip including a processor, configured to call and run a computer program from a memory, so that a device installed with the chip executes the aforementioned method.
  • a computer-readable storage medium is provided, the computer-readable storage medium is used to store a computer program, and the computer program causes a computer to execute the steps of the aforementioned method.
  • a computer program product including computer program instructions, which cause a computer to execute the aforementioned method.
  • a computer program which causes a computer to execute the aforementioned method.
  • the terminal searches for the target cell according to the ephemeris information of the satellite, and then initiates the RRC re-establishment process to the target cell.
  • the ephemeris information it is possible to combine the ephemeris information to assist the search processing of the target cell, thereby avoiding the problem of long service interruption time caused by the use of related technologies for cell search through frequency or identification due to the excessively fast satellite movement.
  • It can determine the possible target cell through the ephemeris information, so that the terminal can search for the target cell as soon as possible in the NTN scenario and initiate the RRC reconstruction process, which improves the processing efficiency of the terminal.
  • FIG. 1 is a schematic diagram 1 of a communication system architecture provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram 1 of the flow of a cell search method provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of the second flow of a cell search method provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a terminal composition structure provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of the composition structure of a communication device provided by an embodiment of the present invention.
  • FIG. 6 is a schematic block diagram of a chip provided by an embodiment of the present application.
  • FIG. 7 is a second schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • GSM Global System of Mobile Communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GSM Global System of Mobile Communication
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the communication system 100 applied in the embodiment of the present application may be as shown in FIG. 1.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a UE 120 (or referred to as a communication terminal device or a terminal device).
  • the network device 110 may provide communication coverage for a specific geographic area, and may communicate with UEs located in the coverage area.
  • the network equipment 110 may be a network equipment (Base Transceiver Station, BTS) in a GSM system or a CDMA system, a network equipment (NodeB, NB) in a WCDMA system, or an evolution in an LTE system Type network equipment (Evolutional Node B, eNB or eNodeB), or a wireless controller in the Cloud Radio Access Network (CRAN), or the network equipment may be a mobile switching center, a relay station, an access point, In-vehicle devices, wearable devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolution of the Public Land Mobile Network (PLMN), etc.
  • BTS Base Transceiver Station
  • NodeB NodeB
  • NB network equipment
  • Evolutional Node B eNodeB
  • eNodeB LTE system Type network equipment
  • CRAN Cloud Radio Access Network
  • the network equipment may be a mobile switching center, a relay station, an access point, In-
  • the communication system 100 further includes at least one UE 120 located within the coverage area of the network device 110.
  • UE as used herein includes but is not limited to connection via wired lines, such as via public switched telephone networks (PSTN), digital subscriber line (Digital Subscriber Line, DSL), digital cable, and direct cable connection; And/or another data connection/network; and/or via a wireless interface, such as for cellular networks, wireless local area networks (WLAN), digital TV networks such as DVB-H networks, satellite networks, AM-FM Broadcast transmitter; and/or another UE's device configured to receive/send communication signals; and/or Internet of Things (IoT) equipment.
  • a UE set to communicate through a wireless interface may be referred to as a "wireless communication terminal device", a “wireless terminal device” or a "mobile terminal device”.
  • D2D communication may be performed between the UEs 120.
  • Non Terrestrial Network non-terrestrial communication network
  • the NTN uses satellite communication to provide communication services to ground users.
  • satellite communication has many unique advantages. First of all, satellite communication is not restricted by the user area. For example, general terrestrial communication cannot cover the ocean, mountains, deserts and other areas where communication equipment cannot be installed or because of the sparse population. Satellites can cover a larger ground, and satellites can orbit the earth, so theoretically every corner of the earth can be covered by satellite communications. Secondly, satellite communication has greater social value.
  • Satellite communication can be covered at a lower cost in remote mountainous areas, poor and backward countries or regions, so that people in these areas can enjoy advanced voice communication and mobile Internet technology, which is conducive to narrowing the digital gap with developed areas and promoting The development of these areas.
  • the satellite communication distance is long, and the communication cost has not increased significantly with the increase of the communication distance; finally, the stability of satellite communication is high, and it is not restricted by natural disasters.
  • Communication satellites are classified into LEO (Low-Earth Orbit) satellites, MEO (Medium-Earth Orbit) satellites, GEO (Geostationary Earth Orbit, geosynchronous orbit) satellites, HEO (High Elliptical Orbit (highly elliptical orbit) satellites and so on. in,
  • the altitude range of low-orbit satellites is 500km-1500km, and the corresponding orbital period is about 1.5 hours to 2 hours.
  • the signal propagation delay of single-hop communication between users is generally less than 20ms.
  • the maximum satellite viewing time is 20 minutes.
  • the signal propagation distance is short, the link loss is small, and the requirement for the transmission power of the user terminal is not high.
  • GEO is a geosynchronous orbit satellite with an orbital height of 35786km and a rotation period of 24 hours around the earth.
  • the signal propagation delay of single-hop communication between users is generally 250ms.
  • satellites In order to ensure the coverage of satellites and increase the system capacity of the entire satellite communication system, satellites use multiple beams to cover the ground.
  • a satellite can form dozens or even hundreds of beams to cover the ground; a satellite beam can cover tens to hundreds of kilometers in diameter. Ground area.
  • an embodiment of the present invention provides a cell search method, as shown in FIG. 2, including:
  • Step 21 The terminal is in a radio resource control (RRC, Radio Resource Control) connection state, and if the first preset condition is met, the terminal searches for the target cell according to the ephemeris information;
  • RRC Radio Resource Control
  • Step 22 The terminal initiates an RRC connection re-establishment process to the target communication device of the target cell.
  • the communication device in this embodiment may be a satellite.
  • the types of satellites have been explained above, so I won't repeat them here.
  • the first preset condition includes at least one of the following:
  • Handover failure (HOF, Hand-Over Failure) occurs at the terminal; Radio Link Failure (RLF) occurs at the terminal; integrity protection fails at the terminal; RRC reconfiguration fails at the terminal.
  • HAF Handover failure
  • RLF Radio Link Failure
  • the first preset condition may also include other situations, as long as it is a situation that requires RRC re-establishment, it can be included in the foregoing first preset condition, and it will not be exhaustive here.
  • the foregoing ephemeris information may include: ephemeris information corresponding to the source serving cell, and/or ephemeris information corresponding to neighboring cells of the source serving cell.
  • the ephemeris information corresponding to the source serving cell may be the ephemeris information corresponding to the satellite of the source serving cell (that is, the source communication device); the ephemeris information corresponding to the neighboring cells of the source serving cell may be the ephemeris information of the source serving cell.
  • the neighboring cells of the source serving cell can be one or more.
  • the ephemeris information corresponding to the neighboring cells of the source serving cell can be the satellite (communication) of one or more neighboring cells.
  • the ephemeris information is: the source communication device of the source serving cell sends to the terminal through system broadcast; for example, the ephemeris information may be carried in MIB or SIB;
  • the source communication device of the source serving cell is configured to the terminal through dedicated signaling.
  • the ephemeris information may be carried in MAC CE and RRC signaling.
  • the source serving cell of the terminal is: the last serving cell when the terminal meets the first preset condition. That is, when the terminal meets the first preset condition, the serving cell to which the terminal is connected or in is the last serving cell, that is, the source serving cell. For example, a handover failure occurs when the terminal is connected to the source serving cell, then the source serving cell is the last serving cell connected when the terminal meets the first preset condition. Other situations are similar to this, and will not be described again.
  • the ephemeris information may be ephemeris data, also known as ephemeris, which is a table of stellar orbit parameters, that is, the list data is used to indicate the predetermined location of a stellar body at regular intervals, or at regular intervals. The scheduled location of an artificial satellite at time.
  • ephemeris also known as ephemeris, which is a table of stellar orbit parameters, that is, the list data is used to indicate the predetermined location of a stellar body at regular intervals, or at regular intervals. The scheduled location of an artificial satellite at time.
  • Communication equipment such as satellites, spacecraft, or flying objects, are included in the NORAD ephemeris information catalog once they enter space. Spacecraft listed in the NORAD ephemeris information number catalog will be tracked for life.
  • the ephemeris information of the satellite uses the mathematical relationship between the six orbital parameters of Kepler's law to determine the time, coordinates, azimuth, speed and other parameters of the flying body, which has extremely high accuracy.
  • the ephemeris information of the satellite can accurately calculate, predict, describe, and track the time, position, speed and other operating status of satellites and flying objects; it can express the precise parameters of flying objects such as celestial bodies, satellites, spacecraft, missiles, and space junk;
  • the flying body is placed in a three-dimensional space; the past, present, and future of the celestial body are depicted three-dimensionally with time.
  • the time of the satellite's ephemeris information is calculated according to Universal Coordinated Time (UTC).
  • UTC Universal Coordinated Time
  • the ephemeris information of the satellite can be updated regularly.
  • the update method can be that once the parameters are added or adjusted, the ephemeris information can be updated accordingly; or, an update cycle can be set, such as 1 month, or 1 day, or 3 months, etc. , According to the update cycle to update the ephemeris information of the satellite.
  • the two-line track data format given by 3GPP TR38.821 contains the information shown in Table 1 below:
  • the terminal can obtain the source communication equipment, that is, the movement track of the ephemeris information of the last connected service satellite.
  • the source communication device can send to the terminal the ephemeris information corresponding to the source serving cell, or the ephemeris information corresponding to the source communication device (that is, the satellite) called the source serving cell; it can also send to the terminal
  • the ephemeris information of the neighboring cell can be understood as the source communication device sends the ephemeris information of the communication satellite (communication device) of the neighboring cell to the terminal.
  • the terminal has been able to obtain the ephemeris information corresponding to the source communication device of the source serving cell and the ephemeris information of the communication device corresponding to at least one neighboring cell.
  • the timer is started.
  • the timer can be used to control RRC re-establishment.
  • the terminal determines that one of a handover failure, a radio link failure, an integrity protection failure, or an RRC reconfiguration failure occurs, it can start the timer.
  • the duration of the timer can be configured for the terminal by the source communication device of the source serving cell, for example, it can be configured through system information (system broadcast), or it can be configured for the terminal through signaling such as RRC, MACCE, etc., here Do not exhaustively. Alternatively, the duration of the timer may also be determined by the terminal itself according to the protocol.
  • the processing method of the terminal further includes:
  • the terminal determines the candidate cell according to at least one of the ephemeris information corresponding to the source serving cell, the ephemeris information corresponding to the neighboring cell, and the current value of the timer; wherein the candidate cell is the terminal pre-judged Cells within its coverage area;
  • the terminal searches for the candidate cell according to the related information of the candidate cell, and uses the searched candidate cell as a target cell.
  • the terminal may also combine its current area or location to determine Select candidate cells.
  • the current area or location of the terminal can be identified according to the geographic location or coverage of the source cell of the terminal, or more accurately, the terminal can obtain its own longitude and latitude (may also include altitude) through its own GPS module.
  • the foregoing determination of candidate cells may be determining one or more candidate cells; then, the terminal may obtain related information of one or more candidate cells.
  • the related information of the candidate cell includes at least one of the following: identification information of the candidate cell, and frequency point information of the candidate cell.
  • the terminal may determine a candidate cell list according to at least one of the ephemeris information corresponding to the source serving cell, the ephemeris information corresponding to the neighboring cells, and the current value of the timer.
  • the candidate cell list may include related information of the one or more candidate cells.
  • the terminal determines whether at the current moment, the communication equipment of at least one neighboring cell has any coverage area that will cover the terminal , If there is, the cell is regarded as a candidate cell; until all candidate cells are selected.
  • the terminal can determine whether the coverage of any neighboring cell will include its own location or area based on the current value of the timer, the current location, and the ephemeris information corresponding to the neighboring cell, and if so, it will be used as A candidate cell until all candidate cells are selected.
  • the terminal can also determine whether there is coverage of any cell, including ephemeris information corresponding to neighboring cells, and ephemeris information corresponding to the source serving cell based on the current value of the timer, the current location or area, and the ephemeris information corresponding to the source serving cell.
  • the location or area of the terminal itself if there is one, is used as a candidate cell until all candidate cells are selected.
  • the terminal searches for the candidate cell according to the relevant information of the candidate cell, and uses the searched candidate cell as the target cell. It can be understood that the terminal detects at least The signal strength of a candidate cell (which can be understood as detecting the reference signal strength of at least one candidate cell), and the candidate cell with the strongest signal strength is used as the target cell. Then initiate an RRC connection re-establishment process to the target cell.
  • the step of using the searched candidate cell as the target cell further includes:
  • the candidate cell is used as the target cell.
  • the terminal searches for the candidate cell with the highest reference signal strength that satisfies the S criterion, then the candidate cell with the highest reference signal strength is used as the target cell.
  • the S criterion is a criterion for judging whether the terminal device can access the target cell.
  • the S criterion can be expressed by the following formula:
  • Qrxlevmeas represents the RSRP value of the target cell measured by the terminal equipment, in dBm;
  • Qrxlevmin is the first received signal quality threshold; specifically, it may be the minimum received strength requirement of RSRP in the target cell, in dBm.
  • Qrxlevminoffset is the offset value. Since Srxlev is used to evaluate the cell quality when camping on the VPLMN to search for a high-priority PLMN, the offset of Qrxlevmin is required. Used to prevent the ping-pong effect.
  • Pcompensation which can be Max(PEMAX–PUMAX, 0), in dB; among them, PEMAX is the maximum uplink transmit power allowed by the terminal in the cell, in dBm, which can be obtained from broadcast messages; PUMAX is the maximum uplink transmission power determined by the terminal's capabilities Transmit power, in dBm.
  • the terminal When selecting a cell, the terminal obtains the Qrxlevmeas value of the cell through measurement, obtains other parameters in the S criterion formula through the system information of the cell and its own capability level, calculates Srxlex, and compares it with 0. If Srxlex>0, the terminal It is considered that the cell meets the channel quality requirements for cell selection and can be selected as the camping cell. If the system information of the cell broadcasts that it is allowed to camp on, the terminal will choose to camp on this cell and enter the idle state.
  • the terminal device is not allowed to camp in the target cell or is not allowed to access the target cell, otherwise, the terminal is allowed to access the target cell.
  • the terminal After the terminal has searched for the candidate cell with the strongest reference signal strength among one or more candidate cells, it judges whether the candidate cell with the strongest test signal strength is allowed to access according to the S criterion, and if it is allowed, it will be tested.
  • the candidate cell with the strongest signal strength is used as the target cell.
  • the terminal determines whether the candidate cell with the second strongest reference signal strength meets the S criterion, and if it is satisfied, selects the second strongest reference signal strength The candidate cell of as the target cell, and so on, until the target cell is selected.
  • the terminal can search again, select one or more candidate cells again, and select the target cell from the one or more candidate cells selected again.
  • the preset duration can be implemented by another timer, which will not be repeated here.
  • the terminal searches for the target cell for the RRC connection reestablishment based on the ephemeris information, including:
  • Step 31 The terminal starts a timer T1; specifically, the terminal starts the timer T1 when a handover fails, or a radio link fails, or integrity protection fails, or RRC reconfiguration fails.
  • Step 32 The terminal triggers a cell search.
  • the terminal uses the ephemeris information of the satellite corresponding to the last serving cell (that is, the source serving cell) before the failure, and/or the current value of T1, and/or other ephemeris information (That is, the ephemeris information of neighboring cells), determine the candidate cell information that may be in its coverage at this time, such as cell identification information, and/or frequency point information, and search for the cell.
  • Step 33 If a candidate cell is found and the cell satisfies the S criterion, stop the timer T1.
  • the terminal does not search for a candidate cell, it can keep searching until it finds a candidate cell that meets the requirements; or, it can be controlled by a timer. For example, when the aforementioned timer T1 stops, it still cannot be found.
  • T1 stops, it still cannot be found.
  • candidate cell then it is determined that RRC re-establishment cannot be performed; of course, another timer can be used, such as timer T2 for control, and its opening time can be the same as T1, and the timing duration can be different from T1, such as shorter than T1.
  • T2 for control
  • T2 for control
  • the timing duration can be different from T1, such as shorter than T1.
  • T1 timer T2 for control
  • Step 34 The terminal initiates an RRC connection re-establishment process to the target communication device of the target cell.
  • the terminal searches for the target cell according to the ephemeris information of the satellite, and then initiates the RRC re-establishment process to the target cell.
  • the terminal searches for the target cell according to the ephemeris information of the satellite, and then initiates the RRC re-establishment process to the target cell.
  • it is possible to combine the ephemeris information to assist the search processing of the target cell, thereby avoiding the problem of long service interruption time caused by the use of related technologies for cell search through frequency or identification due to the excessively fast satellite movement.
  • It can determine the possible target cell through the ephemeris information, so that the terminal can search for the target cell as soon as possible in the NTN scenario and initiate the RRC reconstruction process, which improves the processing efficiency of the terminal.
  • the embodiment of the present invention provides a terminal, as shown in FIG. 4, including:
  • the communication unit 41 is in a radio resource control (RRC, Radio Resource Control) connection state.
  • RRC Radio Resource Control
  • the terminal searches for the target cell according to the ephemeris information; initiates to the target communication device of the target cell RRC connection re-establishment process.
  • the communication device in this embodiment may be a satellite.
  • the types of satellites have been explained above, so I won't repeat them here.
  • the first preset condition includes at least one of the following:
  • Handover failure (HOF, Hand-Over Failure) occurs at the terminal; Radio Link Failure (RLF) occurs at the terminal; integrity protection fails at the terminal; RRC reconfiguration fails at the terminal.
  • HAF Handover failure
  • RLF Radio Link Failure
  • the first preset condition may also include other situations, and as long as the RRC re-establishment is required, it can be included in the foregoing first preset condition, and the exhaustive list will not be given here.
  • the foregoing ephemeris information may include: ephemeris information corresponding to the source serving cell, and/or ephemeris information corresponding to neighboring cells of the source serving cell.
  • the ephemeris information corresponding to the source serving cell may be the ephemeris information corresponding to the satellite of the source serving cell (that is, the source communication device); the ephemeris information corresponding to the neighboring cells of the source serving cell may be the ephemeris information of the source serving cell.
  • the neighboring cells of the source serving cell can be one or more.
  • the ephemeris information corresponding to the neighboring cells of the source serving cell can be the satellite (communication) of one or more neighboring cells.
  • the ephemeris information is: the source communication device of the source serving cell is sent to the terminal through system broadcast; for example, the ephemeris information may be carried in the MIB or SIB;
  • the source communication device of the source serving cell is configured to the terminal through dedicated signaling.
  • the ephemeris information may be carried in MAC CE and RRC signaling.
  • the source serving cell of the terminal is: the last serving cell when the terminal meets the first preset condition.
  • the ephemeris information may be ephemeris data, also known as ephemeris, which is a table of stellar orbit parameters, that is, the list data is used to indicate the predetermined location of a stellar body at regular intervals, or at regular intervals. The scheduled location of an artificial satellite at time.
  • ephemeris also known as ephemeris, which is a table of stellar orbit parameters, that is, the list data is used to indicate the predetermined location of a stellar body at regular intervals, or at regular intervals. The scheduled location of an artificial satellite at time.
  • the terminal further includes a processing unit 42, which starts a timer when it is determined that the first preset condition is met.
  • the duration of the timer can be configured for the terminal by the source communication device of the source serving cell, for example, it can be configured through system information (system broadcast), or it can be configured for the terminal through signaling such as RRC, MACCE, etc., here Do not exhaustively. Alternatively, the duration of the timer may also be determined by the terminal itself according to the protocol.
  • the processing unit 42 determines a candidate cell according to at least one of the ephemeris information corresponding to the source serving cell, the ephemeris information corresponding to the neighboring cell, and the current value of the timer; wherein the candidate cell is The terminal predicts the cell in its coverage area;
  • the communication unit 41 searches for the candidate cell according to related information of the candidate cell, and uses the searched candidate cell as a target cell.
  • the processing unit 42 may also combine the current area or location. Location to select candidate cells. Wherein, the current area or location of the terminal can be identified according to the geographic location or coverage of the source cell of the terminal, or more accurately, the terminal can obtain its own longitude and latitude (may also include altitude) through its own GPS module.
  • the foregoing determination of candidate cells may be determining one or more candidate cells; then, the terminal may obtain related information of one or more candidate cells.
  • the related information of the candidate cell includes at least one of the following: identification information of the candidate cell, and frequency point information of the candidate cell.
  • the candidate cell is used as the target cell.
  • the communication unit 41 after searching for the candidate cell with the strongest reference signal strength among one or more candidate cells, judges whether the candidate cell with the strongest test signal strength is allowed to access according to the S criterion, and if it is allowed, then The candidate cell with the strongest test signal strength is used as the target cell.
  • the terminal judges whether the candidate cell with the second strongest reference signal strength meets the S criterion, and if so, selects the reference signal strength The second strongest candidate cell is used as the target cell, and so on, until the target cell is selected.
  • the search can be performed again, one or more candidate cells are selected again, and the target cell is selected from the one or more candidate cells selected again.
  • the preset duration can be implemented by another timer, which will not be repeated here.
  • the processing unit 42 may stop the aforementioned timer.
  • the terminal if the terminal meets the first preset condition in the RRC connected state, it searches for the target cell according to the ephemeris information of the satellite, and then initiates the RRC re-establishment process to the target cell.
  • the ephemeris information it is possible to combine the ephemeris information to assist the search processing of the target cell, thereby avoiding the problem of long service interruption and delay caused by the use of related technologies for cell search through frequency or identification due to too fast satellite movement.
  • It can determine the possible target cell through the ephemeris information, so that the terminal can search for the target cell as soon as possible in the NTN scenario and initiate the RRC reconstruction process, which improves the processing efficiency of the terminal.
  • FIG. 5 is a schematic structural diagram of a communication device 500 according to an embodiment of the present invention.
  • the communication device in this embodiment may be specifically a terminal or a satellite in the foregoing embodiment.
  • the communication device 500 shown in FIG. 5 includes a processor 510, and the processor 510 can call and run a computer program from the memory to implement the method in the embodiment of the present invention.
  • the communication device 500 may further include a memory 520.
  • the processor 510 may call and run a computer program from the memory 520 to implement the method in the embodiment of the present invention.
  • the memory 520 may be a separate device independent of the processor 510, or may be integrated in the processor 510.
  • the communication device 500 may further include a transceiver 530, and the processor 510 may control the transceiver 530 to communicate with other devices. Specifically, it may send information or data to other devices, or receive other devices. Information or data sent by the device.
  • the transceiver 530 may include a transmitter and a receiver.
  • the transceiver 530 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 500 may specifically be a terminal in an embodiment of the present invention, and the communication device 500 may implement corresponding processes implemented by a network device in each method in the embodiments of the present invention. For brevity, details are not described herein again.
  • Fig. 6 is a schematic structural diagram of a chip according to an embodiment of the present invention.
  • the chip 600 shown in FIG. 6 includes a processor 610, and the processor 610 can call and run a computer program from the memory to implement the method in the embodiment of the present invention.
  • the chip 600 may further include a memory 620.
  • the processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present invention.
  • the memory 620 may be a separate device independent of the processor 610, or may be integrated in the processor 610.
  • the chip 600 may further include an input interface 630.
  • the processor 610 can control the input interface 630 to communicate with other devices or chips, and specifically, can obtain information or data sent by other devices or chips.
  • the chip 600 may further include an output interface 640.
  • the processor 610 can control the output interface 640 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the chip can be applied to the terminal in the embodiment of the present invention, and the chip can implement the corresponding process implemented by the satellite in each method of the embodiment of the present invention.
  • the chip can implement the corresponding process implemented by the satellite in each method of the embodiment of the present invention.
  • the chip mentioned in the embodiment of the present invention may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-chip, etc.
  • the processor in the embodiment of the present invention may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (ASIC), a ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC application specific integrated circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in combination with the embodiments of the present invention may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (Random Access Memory, RAM), which is used as an external cache.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Enhanced SDRAM, ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • Synchronous Link Dynamic Random Access Memory Synchronous Link Dynamic Random Access Memory
  • DR RAM Direct Rambus RAM
  • the memory in the embodiment of the present invention may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, the memory in the embodiment of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.
  • FIG. 7 is a schematic block diagram of a communication system 700 according to an embodiment of the present application. As shown in FIG. 7, the communication system 700 includes a satellite 710 and a terminal 720.
  • the satellite 710 can be used to implement the corresponding functions implemented by the communication device in the foregoing method
  • the terminal 720 can be used to implement the corresponding functions implemented by the terminal in the foregoing method.
  • the satellite 710 can be used to implement the corresponding functions implemented by the communication device in the foregoing method
  • the terminal 720 can be used to implement the corresponding functions implemented by the terminal in the foregoing method.
  • the embodiment of the present invention also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium can be applied to the network device or satellite in the embodiment of the present invention, and the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present invention.
  • the computer program causes the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present invention.
  • the embodiment of the present invention also provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device or satellite in the embodiment of the present invention, and the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present invention.
  • the computer program instructions cause the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present invention.
  • the embodiment of the present invention also provides a computer program.
  • the computer program can be applied to the network device or satellite in the embodiment of the present invention.
  • the computer program runs on the computer, the computer executes the corresponding process implemented by the network device in each method of the embodiment of the present invention.
  • I will not repeat them here.
  • the disclosed system, device, and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present invention essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present invention.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

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Abstract

本发明公开了一种小区搜索方法、终端、芯片、计算机可读存储介质、计算机程序产品以及计算机程序，所述方法包括：终端处于无线资源控制RRC连接状态，在符合第一预设条件的情况下，所述终端根据星历信息搜索目标小区；所述终端向所述目标小区的目标通信设备发起RRC连接重建过程。

Description

一种小区搜索方法及终端 技术领域
本发明涉及通信领域，尤其涉及一种小区搜索方法、终端、芯片、计算机可读存储介质、计算机程序产品以及计算机程序。
背景技术
在相关技术中，终端处于RRC连接状态但出现切换失败、或者无线链路失败、或者完整性保护失败、或者RRC重配置失败等情况时问题时，触发终端执行小区搜索在搜索到的目标小区发起RRC连接重建过程。
目前3GPP正在研究Non Terrestrial Network(NTN，非地面通信网络)技术，NTN一般采用卫星通信的方式向地面用户提供通信服务。在卫星通信系统中，由于终端所检测的小区是移动的，并不是向传统的小区那样有固定静止不动的；同时由于卫星通信中，空口传输时延比较大，所以RRC连接重建时延也会相对较大。因此如果采用与相关技术中同样的方法进行小区搜索，就有可能会出现业务中断时延较长的问题。
发明内容
为解决上述技术问题，本发明实施例提供了一种小区搜索方法、终端、芯片、计算机可读存储介质、计算机程序产品以及计算机程序。
第一方面，提供了一种小区搜索方法，包括：
终端处于无线资源控制RRC连接状态，在符合第一预设条件的情况下，所述终端根据星历信息搜索目标小区；
所述终端向所述目标小区的目标通信设备发起RRC连接重建过程。
第二方面，提供了一种终端，包括：
通信单元，处于无线资源控制RRC连接状态，在符合第一预设条件的情况下，根据星历信息搜索目标小区；向所述目标小区的目标通信设备发起RRC连接重建过程。
第三方面，提供了一种终端，包括：处理器和用于存储能够在处理器上运行的计算机程序的存储器，
其中，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如前述方法的步骤。
第四方面，提供了一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如前述方法。
第五方面，提供了一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序，所述计算机程序使得计算机执行如前述方法的步骤。
第六方面，提供了一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行如前述的方法。
第七方面，提供了一种计算机程序，所述计算机程序使得计算机执行如前述的方法。
通过采用上述方案，终端在处于RRC连接态的情况下如果出现符合第一预设条件的情况，就根据卫星的星历信息进行目标小区的搜索，进而向目标小区发起RRC重建立过程。如此，就能够结合星历信息辅助目标小区的搜索处理，从而避免了由于卫星移动过快，而仍采用相关技术中通过频点或标识进行小区搜索所带来的业务中断时延较长的问题，能够通过星历信息确定可能的目标小区，使得终端在NTN场景下尽快的搜索到目标小区并发起RRC重建过程，提升终端的处理效率。
附图说明
图1是本申请实施例提供的一种通信系统架构的示意性图一；
图2是本申请实施例提供的一种小区搜素方法流程示意图一；
图3是本申请实施例提供的一种小区搜素方法流程示意图二；
图4是本申请实施例提供的一种终端组成结构示意图；
图5为本发明实施例提供的一种通信设备组成结构示意图；
图6是本申请实施例提供的一种芯片的示意性框图；
图7是本申请实施例提供的一种通信系统架构的示意性图二。
具体实施方式
为了能够更加详尽地了解本发明实施例的特点与技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统或5G系统等。
示例性的，本申请实施例应用的通信系统100可以如图1所示。该通信系统100可以包括网络设备110，网络设备110可以是与UE120(或称为通信终端设备、终端设备)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖，并且可以与位于该覆盖区域内的UE进行通信。可选地，该网络设备110可以是GSM系统或CDMA系统中的网络设备(Base Transceiver Station，BTS)，也可以是WCDMA系统中的网络设备(NodeB，NB)，还可以是LTE系统中的演进型网络设备(Evolutional Node B，eNB或eNodeB)，或者是云无线接入网络(Cloud Radio Access Network，CRAN)中的无线控制器，或者该网络设备可以为移动交换中心、中继站、接入点、车载设备、可穿戴设备、集线器、交换机、网桥、路由器、5G网络中的网络侧设备或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)中的网络设备等。
该通信系统100还包括位于网络设备110覆盖范围内的至少一个UE120。作为在此使用的“UE”包括但不限于经由有线线路连接，如经由公共交换电话网络(Public Switched Telephone Networks，PSTN)、数字用户线路(Digital Subscriber Line，DSL)、数字电缆、直接电缆连接；和/或另一数据连接/网络；和/或经由无线接口，如，针对蜂窝网络、无线局域网(Wireless Local Area Network，WLAN)、诸如DVB-H网络的数字电视网络、卫星网络、AM-FM广播发送器；和/或另一UE的被设置成接收/发送通信信号的装置；和/或物联网(Internet of Things，IoT)设备。被设置成通过无线接口通信的UE可以被称为“无线通信终端设备”、“无线终端设备”或“移动终端设备”。
可选地，UE120之间可以进行终端设备直连(Device to Device，D2D)通信。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
为了能够更加详尽地了解本发明实施例的特点与技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
本申请提供的实施例，可以应用于Non Terrestrial Network(NTN，非地面通信网络)中。其中，所述NTN采用卫星通信的方式向地面用户提供通信服务。相比地面蜂窝网通信，卫星通信具有很多独特的优点。首先，卫星通信不受用户地域的限制，例如一般的陆地通信不能覆盖海洋、高山、沙漠等无法搭设通信设备或由于人口稀少而不做通信覆盖的区域，而对于卫星通信来说，由于一颗卫星即可以覆盖较大的地面，加之卫星可以围绕地球做轨道运动，因此理论上地球上每一个角落都可以被卫星通信覆盖。其次，卫星通信有较大的社会价值。卫星通信在边远山区、贫穷落后的国家或地区都可以以较低的成本覆盖到，从而使这些地区的人们享受到先进的 语音通信和移动互联网技术，有利于缩小与发达地区的数字鸿沟，促进这些地区的发展。再次，卫星通信距离远，且通信距离增大通讯的成本没有明显增加；最后，卫星通信的稳定性高，不受自然灾害的限制。
通信卫星按照轨道高度的不同分为LEO(Low-Earth Orbit，低地球轨道)卫星、MEO(Medium-Earth Orbit，中地球轨道)卫星、GEO(Geostationary Earth Orbit，地球同步轨道)卫星、HEO(High Elliptical Orbit，高椭圆轨道)卫星等等。其中，
LEO，低轨道卫星高度范围为500km～1500km，相应轨道周期约为1.5小时～2小时。用户间单跳通信的信号传播延迟一般小于20ms。最大卫星可视时间20分钟。信号传播距离短，链路损耗少，对用户终端的发射功率要求不高。
GEO，地球同步轨道卫星，轨道高度为35786km，围绕地球旋转周期为24小时。用户间单跳通信的信号传播延迟一般为250ms。
为了保证卫星的覆盖以及提升整个卫星通信系统的系统容量，卫星采用多波束覆盖地面，一颗卫星可以形成几十甚至数百个波束来覆盖地面；一个卫星波束可以覆盖直径几十至上百公里的地面区域。
基于前述架构，本发明实施例提供一种小区搜索方法，如图2所示，包括：
步骤21：终端处于无线资源控制(RRC，Radio Resource Control)连接状态，在符合第一预设条件的情况下，所述终端根据星历信息搜索目标小区；
步骤22：所述终端向所述目标小区的目标通信设备发起RRC连接重建过程。
本实施例中所述通信设备(目标通信设备或源通信设备)可以为卫星。关于卫星的类型前述已经说明，这里不再赘述。
所述第一预设条件包括以下至少之一：
所述终端发生切换失败(HOF，Hand-Over Failure)；所述终端发生无线链路失败(RLF)；所述终端发生完整性保护失败；所述终端发生RRC重配置失败。
当然，所述第一预设条件还可能包括其他情况，只要是需要进行RRC 重建立的情况均可以包括在前述第一预设条件中，这里不再进行穷举。
前述星历信息，可以包括：源服务小区对应的星历信息，和/或，源服务小区的相邻小区对应的星历信息。
所述源服务小区对应的星历信息，可以为源服务小区的卫星(也就是源通信设备)对应的星历信息；源服务小区的相邻小区对应的星历信息，可以为源服务小区的相邻小区的卫星(也就是通信设备)的星历信息。
需要指出的是，源服务小区的相邻小区可以为一个或多个，相应的，所述源服务小区的相邻小区对应的星历信息，可以为一个或多个相邻小区的卫星(通信设备)对应的一个或多个星历信息。
所述星历信息，为：源服务小区的源通信设备通过系统广播发送给所述终端；比如，可以在MIB或SIB中携带所述星历信息；
或者，所述源服务小区的源通信设备通过专用信令配置给所述终端。又或者，可以在MAC CE、RRC信令中携带所述星历信息。
终端的源服务小区为：所述终端符合第一预设条件的情况下的最后一个服务小区。即终端在符合第一预设条件的情况下，终端所连接或者所处于的服务小区即为所述最后一个服务小区，也就是源服务小区。举例来说，终端在与源服务小区连接时，发生切换失败，那么该源服务小区为终端符合第一预设条件的情况下所连接的最后一个服务小区，其他情况与其类似，不再赘述。
其中，所述星历信息，可以为星历数据(ephemeris data)亦称星历表，是一种星体轨道参数表，即用列表数据说明每隔一定时间某星体预定所在位置，或每隔一定时间某人造卫星预定所在位置。
通信设备，比如卫星、航天器或飞行体，一旦进入太空，即被列入NORAD星历信息编号目录。列入NORAD星历信息编号目录的太空飞行体将被终生跟踪。
卫星的星历信息，以开普勒定律的6个轨道参数之间的数学关系确定飞行体的时间、坐标、方位、速度等各项参数，具有极高的精度。卫星的星历信息能精确计算、预测、描绘、跟踪卫星、飞行体的时间、位置、速度等运行状态；能表达天体、卫星、航天器、导弹、太空垃圾等飞行体的精确参数；能将飞行体置于三维的空间；用时间立体描绘天体的过去、现在 和将来。卫星的星历信息的时间按世界标准时间(UTC)计算。并且，所述卫星的星历信息可以定时更新。其更新的方式可以为一旦增加参数或者进行了参数调整，那么可以相应的更新其星历信息信息；又或者，可以设置一个更新周期，比如1个月，或者1天，或者3个月等等，根据该更新周期进行卫星的星历信息的更新。
3GPP TR38.821给出的两行式轨道数据格式包含如下表1所示的信息：
表1(第一行星历，First line of the ephemeris)
Figure PCTCN2020073833-appb-000001
Figure PCTCN2020073833-appb-000002
表2:(第二行)
Figure PCTCN2020073833-appb-000003
可以看出，基于前述表1、2，终端可以得到源通信设备，也就是上一次连接的服务卫星的星历信息的运动轨迹等内容。
同样的，前述已经描述，源通信设备可以向终端发送源服务小区所对应的星历信息，或称为源服务小区的源通信设备(也就是卫星)对应的星历信息；还可以向终端发送相邻小区的星历信息，可以理解源通信设备向终端发送相邻小区的通信卫星(通信设备)的星历信息。
至此，本实施例提供的方案中终端已经能够得到源服务小区的源通信设备所对应的星历信息，以及至少一个相邻小区对应的通信设备的星历信息。
下面结合前述获得的星历信息来进一步描述，终端如何进行目标小区选取以及搜索的处理：
首先，在终端确定符合所述第一预设条件时，开启定时器。
其中，所述定时器可以用于对RRC重建立进行控制。
也就是说，所述终端一旦确定发生切换失败、发生无线链路失败、发生完整性保护失败发生RRC重配置失败中之一，就可以开启所述定时器。
所述定时器的时长可以由源服务小区的源通信设备为终端配置的，比如，可以通过系统信息(系统广播)进行配置，又或者，可以通过RRC、MACCE等信令为终端进行配置，这里不做穷举。或者，所述定时器的时长还可以为终端自身根据协议确定的。
然后，所述终端的处理方法还包括：
所述终端根据源服务小区对应的星历信息、相邻小区对应的星历信息、所述定时器的当前值中至少之一，确定候选小区；其中，所述候选小区为所述终端预判处于其覆盖范围的小区；
所述终端根据所述候选小区的相关信息，对所述候选小区进行搜索，将搜索到的候选小区作为目标小区。
另外，除了上述源服务小区对应的星历信息、相邻小区对应的星历信息、所述定时器的当前值中至少之一之外，所述终端还可以结合当前所在区域或所在位置，来选取候选小区。其中，终端当前所在区域或所在位置可以根据终端源小区的地理位置或覆盖范围来识别，或者更精确一些，终端可以通过自身的GPS模块得到自身的经纬度(还可以包括高度)等等。
前述确定候选小区，可以为确定一个或多个候选小区；然后终端可以获取一个或多个候选小区的相关信息。
其中，所述候选小区的相关信息，包括以下至少之一：候选小区的标识信息、候选小区的频点信息。
换句话说，终端可以根据前述源服务小区对应的星历信息、相邻小区对应的星历信息、所述定时器的当前值中至少之一，确定一个候选小区列表。在所述候选小区列表中可以包括有所述一个或多个候选小区的相关信息。
举例来说，终端根据定时器当前值、以及至少一个相邻小区对应的星历信息，判断在当前时刻，至少一个相邻小区的通信设备是否有任意一个的覆盖范围将会覆盖到所述终端，如果有则将该小区作为一个候选小区；直至选出全部的候选小区。
又或者，终端可以根据定时器的当前值、当前所在位置，以及相邻小区 对应的星历信息，判断是否有任意一个相邻小区的覆盖范围会包含自身的所在位置或区域，如果有则作为一个候选小区，直至选出全部的候选小区。
再或者，终端还可以根据定时器的当前值、当前所在位置或区域，以及相邻小区对应的星历信息、源服务小区对应的星历信息，判断是否有任意一个小区的覆盖范围、会包含所述终端自身的所在位置或区域，如果有则作为一个候选小区，直至选出全部的候选小区。
所述终端根据所述候选小区的相关信息，对所述候选小区进行搜索，将搜索到的候选小区作为目标小区，可以理解为，所述终端根据候选小区的标识和/或频点，检测至少一个候选小区的信号强度(可以理解为检测至少一个候选小区的参考信号强度)，将其中信号强度最强的候选小区作为所述目标小区。然后向所述目标小区发起RRC连接重建过程。
其中，所述将搜索到的候选小区作为目标小区，还包括：
所述终端搜索到所述候选小区、并且所述候选小区满足S准则，则将所述候选小区作为所述目标小区。
也就是说，如果所述终端搜索到参考信号强度最大的候选小区满足S准则，则将该所述参考信号强度最大的候选小区作为所述目标小区。
其中，所述S准则为判断终端设备是否能够接入目标小区的准则。该S准则可以采用以下公式表示：
Srxlev＝Qrxlevmeas–(Qrxlevmin+Qrxlevminoffset)–Pcompensation-Qoffsettemp；
其中，Qrxlevmeas，表示终端设备测量目标小区的RSRP值，单位dBm；
Qrxlevmin，为所述第一接收信号质量门限值；具体的可以为目标小区中RSRP的最小接收强度要求，单位dBm。
Qrxlevminoffset为偏移值，由于当驻留在VPLMN上搜索高优先级PLMN上的时候，采用Srxlev评估小区质量，需要对Qrxlevmin进行的偏移。用于防止乒乓效应。
Pcompensation，可以为Max(PEMAX–PUMAX，0)，单位dB；其中，PEMAX为终端在小区中允许的最大上行发送功率，单位dBm，可以从广播消息中获得；PUMAX为由终端能力决定的最大上行发送功率，单位dBm。
终端在进行小区选择时，通过测量得到小区的Qrxlevmeas值，通过小区的系统信息及自身能力等级获取S准则公式中的其他参数，计算得到Srxlex，然后与0进行比较，如果Srxlex>0，则终端认为该小区满足小区选择的信道质量要求，可以选择其作为驻留小区。如果该小区的系统信息中广播其为允许驻留，那么终端将选择在此小区上驻留，进入空闲状态。
如果基于前述计算确定目标小区的Srxlex不大于0，那么终端设备是不允许在目标小区驻留或不允许接入目标小区，反之，终端允许接入目标小区。
也就是说，终端搜索到一个或多个候选小区中参考信号强度最强的候选小区之后，通过S准则判断所述考信号强度最强的候选小区是否允许接入，如果允许，则将该考信号强度最强的候选小区作为所述目标小区。
进一步地，如果终端搜索到的参考信号强度最强的候选小区、不满足S准则，那么终端判断参考信号强度第二强的候选小区是否满足S准则，如果满足，则选取参考信号强度第二强的候选小区作为目标小区，以此类推，直至选取出目标小区为止。
又或者，如果在预设时长内无法选到符合要求的小区，那么终端可以重新进行搜索，再次选取一个或多个候选小区，从再次选取的一个或多个候选小区内再选取目标小区。
该预设时长可以由另一个定时器来实现，这里不做赘述。
需要指出的是，一旦确定考信号强度最强的候选小区满足S准则，那么可以将前述定时器停止。
最后，结合图3对本实施例提供的方案进行示例性说明：
终端当处于RRC连接状态但出现切换失败、或者无线链路失败、或者完整性保护失败、或者RRC重配置失败等情况时问题时，根据星历信息辅助来搜索RRC连接重建的目标小区，包括：
步骤31：终端启动定时器T1；具体的，终端出现切换失败、或者无线链路失败、或者完整性保护失败、或者RRC重配置失败等情况时，启动所述定时器T1。
步骤32：终端触发执行小区搜索，此时终端根据失败前的最后一个服务小区(也就是源服务小区)对应的卫星的星历信息，和/或T1的当前值，和 /或其他星历信息(也就是相邻小区的星历信息)，判断此时可能处于其覆盖范围的候选小区信息，例如小区标识信息，和/或频点信息，并搜索小区。
步骤33：如果搜索到候选小区，且该小区满足S准则，则停止定时器T1。
还需要指出的是，如果终端未搜索到候选小区，可以保持搜索，直至搜索到符合要求的候选小区为止；又或者，可以通过定时器来进行控制，比如前述定时器T1停止时，仍无法找到候选小区，那么就确定无法进行RRC重建；当然，可以采用另外的定时器，比如定时器T2进行控制，其开启时间可以与T1相同，定时时长可以与T1不同，比如可以比T1短，当然，还可以比T1长，这里不做限定。
步骤34：所述终端向目标小区的目标通信设备发起RRC连接重建过程。
可见，通过采用上述方案，终端在处于RRC连接态的情况下如果出现符合第一预设条件的情况，就根据卫星的星历信息进行目标小区的搜索，进而向目标小区发起RRC重建立过程。如此，就能够结合星历信息辅助目标小区的搜索处理，从而避免了由于卫星移动过快，而仍采用相关技术中通过频点或标识进行小区搜索所带来的业务中断时延较长的问题，能够通过星历信息确定可能的目标小区，使得终端在NTN场景下尽快的搜索到目标小区并发起RRC重建过程，提升终端的处理效率。
本发明实施例提供一种终端，如图4所示，包括：
通信单元41，处于无线资源控制(RRC，Radio Resource Control)连接状态，在符合第一预设条件的情况下，所述终端根据星历信息搜索目标小区；向所述目标小区的目标通信设备发起RRC连接重建过程。
本实施例中所述通信设备(目标通信设备或源通信设备)可以为卫星。关于卫星的类型前述已经说明，这里不再赘述。
所述第一预设条件包括以下至少之一：
所述终端发生切换失败(HOF，Hand-Over Failure)；所述终端发生无线链路失败(RLF)；所述终端发生完整性保护失败；所述终端发生RRC重配置失败。
当然，所述第一预设条件还可能包括其他情况，只要是需要进行RRC 重建立的情况均可以包括在前述第一预设条件中，这里不再进行穷举。
前述星历信息，可以包括：源服务小区对应的星历信息，和/或，源服务小区的相邻小区对应的星历信息。
所述源服务小区对应的星历信息，可以为源服务小区的卫星(也就是源通信设备)对应的星历信息；源服务小区的相邻小区对应的星历信息，可以为源服务小区的相邻小区的卫星(也就是通信设备)的星历信息。
需要指出的是，源服务小区的相邻小区可以为一个或多个，相应的，所述源服务小区的相邻小区对应的星历信息，可以为一个或多个相邻小区的卫星(通信设备)对应的一个或多个星历信息。
所述星历信息，为：源服务小区的源通信设备通过系统广播发送给所述终端；比如，可以在MIB或SIB中携带所述星历信息；
或者，所述源服务小区的源通信设备通过专用信令配置给所述终端。又或者，可以在MAC CE、RRC信令中携带所述星历信息。
终端的源服务小区为：所述终端符合第一预设条件的情况下的最后一个服务小区。
其中，所述星历信息，可以为星历数据(ephemeris data)亦称星历表，是一种星体轨道参数表，即用列表数据说明每隔一定时间某星体预定所在位置，或每隔一定时间某人造卫星预定所在位置。
下面结合前述获得的星历信息来进一步描述，终端如何进行目标小区选取以及搜索的处理：
所述终端还包括：处理单元42，确定符合所述第一预设条件时，开启定时器。
所述定时器的时长可以由源服务小区的源通信设备为终端配置的，比如，可以通过系统信息(系统广播)进行配置，又或者，可以通过RRC、MACCE等信令为终端进行配置，这里不做穷举。或者，所述定时器的时长还可以为终端自身根据协议确定的。
然后，所述处理单元42，根据源服务小区对应的星历信息、相邻小区对应的星历信息、所述定时器的当前值中至少之一，确定候选小区；其中，所述候选小区为所述终端预判处于其覆盖范围的小区；
所述通信单元41，根据所述候选小区的相关信息，对所述候选小区进行 搜索，将搜索到的候选小区作为目标小区。
另外，除了上述源服务小区对应的星历信息、相邻小区对应的星历信息、所述定时器的当前值中至少之一之外，所述处理单元42，还可以结合当前所在区域或所在位置，来选取候选小区。其中，终端当前所在区域或所在位置可以根据终端源小区的地理位置或覆盖范围来识别，或者更精确一些，终端可以通过自身的GPS模块得到自身的经纬度(还可以包括高度)等等。
前述确定候选小区，可以为确定一个或多个候选小区；然后终端可以获取一个或多个候选小区的相关信息。
其中，所述候选小区的相关信息，包括以下至少之一：候选小区的标识信息、候选小区的频点信息。
其中，所述通信单元41，搜索到所述候选小区、并且所述候选小区满足S准则，则将所述候选小区作为所述目标小区。
也就是说，通信单元41，搜索到一个或多个候选小区中参考信号强度最强的候选小区之后，通过S准则判断所述考信号强度最强的候选小区是否允许接入，如果允许，则将该考信号强度最强的候选小区作为所述目标小区。
进一步地，如果通信单元41，搜索到的参考信号强度最强的候选小区、不满足S准则，那么终端判断参考信号强度第二强的候选小区是否满足S准则，如果满足，则选取参考信号强度第二强的候选小区作为目标小区，以此类推，直至选取出目标小区为止。
又或者，如果在预设时长内无法选到符合要求的小区，那么可以重新进行搜索，再次选取一个或多个候选小区，从再次选取的一个或多个候选小区内再选取目标小区。
该预设时长可以由另一个定时器来实现，这里不做赘述。
需要指出的是，一旦确定考信号强度最强的候选小区满足S准则，那么处理单元42，可以将前述定时器停止。
可见，通过采用上述方案，终端在处于RRC连接态的情况下如果出现符合第一预设条件的情况，就根据卫星的星历信息进行目标小区的搜索，进而向目标小区发起RRC重建立过程。如此，就能够结合星历信息辅助目标小区的搜索处理，从而避免了由于卫星移动过快，而仍采用相关技术中 通过频点或标识进行小区搜索所带来的业务中断时延较长的问题，能够通过星历信息确定可能的目标小区，使得终端在NTN场景下尽快的搜索到目标小区并发起RRC重建过程，提升终端的处理效率。
图5是本发明实施例提供的一种通信设备500示意性结构图，本实施例中的通信设备可以具体为前述实施例中的终端或卫星。图5所示的通信设备500包括处理器510，处理器510可以从存储器中调用并运行计算机程序，以实现本发明实施例中的方法。
可选地，图5所示，通信设备500还可以包括存储器520。其中，处理器510可以从存储器520中调用并运行计算机程序，以实现本发明实施例中的方法。
其中，存储器520可以是独立于处理器510的一个单独的器件，也可以集成在处理器510中。
可选地，如图5所示，通信设备500还可以包括收发器530，处理器510可以控制该收发器530与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器530可以包括发射机和接收机。收发器530还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备500具体可为本发明实施例的终端，并且该通信设备500可以实现本发明实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
图6是本发明实施例的芯片的示意性结构图。图6所示的芯片600包括处理器610，处理器610可以从存储器中调用并运行计算机程序，以实现本发明实施例中的方法。
可选地，如图6所示，芯片600还可以包括存储器620。其中，处理器610可以从存储器620中调用并运行计算机程序，以实现本发明实施例中的方法。
其中，存储器620可以是独立于处理器610的一个单独的器件，也可以集成在处理器610中。
可选地，该芯片600还可以包括输入接口630。其中，处理器610可以 控制该输入接口630与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片600还可以包括输出接口640。其中，处理器610可以控制该输出接口640与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本发明实施例中的终端，并且该芯片可以实现本发明实施例的各个方法中由卫星实现的相应流程，为了简洁，在此不再赘述。
应理解，本发明实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
应理解，本发明实施例的处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本发明实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory， RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解，上述存储器为示例性但不是限制性说明，例如，本发明实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本发明实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
图7是本申请实施例提供的一种通信系统700的示意性框图。如图7所示，该通信系统700包括卫星710和终端720。
其中，该卫星710可以用于实现上述方法中由通信设备实现的相应的功能，以及该终端720可以用于实现上述方法中由终端实现的相应的功能为了简洁，在此不再赘述。
本发明实施例还提供了一种计算机可读存储介质，用于存储计算机程序。
可选的，该计算机可读存储介质可应用于本发明实施例中的网络设备或卫星，并且该计算机程序使得计算机执行本发明实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
本发明实施例还提供了一种计算机程序产品，包括计算机程序指令。
可选的，该计算机程序产品可应用于本发明实施例中的网络设备或卫 星，并且该计算机程序指令使得计算机执行本发明实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
本发明实施例还提供了一种计算机程序。
可选的，该计算机程序可应用于本发明实施例中的网络设备或卫星，当该计算机程序在计算机上运行时，使得计算机执行本发明实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本发明所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使 用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，)ROM、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (25)

  1. 一种小区搜索方法，包括：
    终端处于无线资源控制RRC连接状态，在符合第一预设条件的情况下，所述终端根据星历信息搜索目标小区；
    所述终端向所述目标小区的目标通信设备发起RRC连接重建过程。
  2. 根据权利要求1所述的方法，其中，所述第一预设条件包括以下至少之一：
    所述终端切换失败；所述终端发生无线链路失败；所述终端发生完整性保护失败；所述终端发生RRC重配置失败。
  3. 根据权利要求1所述的方法，其中，所述星历信息，包括：源服务小区对应的星历信息，和/或，源服务小区的相邻小区对应的星历信息。
  4. 根据权利要求3所述的方法，其中，所述星历信息，为：
    源服务小区的源通信设备通过系统广播发送给所述终端；
    或者，所述源服务小区的源通信设备通过专用信令配置给所述终端。
  5. 根据权利要求1-4任一项所述的方法，其中，所述方法还包括：
    所述终端在确定符合所述第一预设条件时，开启定时器。
  6. 根据权利要求5所述的方法，其中，所述终端根据星历信息搜索目标小区，包括：
    所述终端根据源服务小区对应的星历信息、相邻小区对应的星历信息、所述定时器的当前值中至少之一，确定候选小区；其中，所述候选小区为所述终端预判处于其覆盖范围的小区；
    所述终端根据所述候选小区的相关信息，对所述候选小区进行搜索，将搜索到的候选小区作为目标小区。
  7. 根据权利要求6所述的方法，其中，所述候选小区的相关信息，包括以下至少之一：
    候选小区的标识信息、候选小区的频点信息。
  8. 根据权利要求7所述的方法，其中，所述将搜索到的候选小区作为目标小区，还包括：
    所述终端搜索到所述候选小区、并且所述候选小区满足S准则，则将所 述候选小区作为所述目标小区。
  9. 根据权利要求8所述的方法，其中，所述方法还包括：
    所述终端确定所述候选小区满足S准则时，停止所述定时器。
  10. 根据权利要求3-9任一项所述的方法，其中，终端的源服务小区为：所述终端符合第一预设条件的情况下的最后一个服务小区。
  11. 一种终端，包括：
    通信单元，处于无线资源控制RRC连接状态，在符合第一预设条件的情况下，根据星历信息搜索目标小区；向所述目标小区的目标通信设备发起RRC连接重建过程。
  12. 根据权利要求11所述的终端，其中，所述第一预设条件包括以下至少之一：
    所述终端切换失败；所述终端发生无线链路失败；所述终端发生完整性保护失败；所述终端发生RRC重配置失败。
  13. 根据权利要求11所述的终端，其中，所述星历信息，包括：源服务小区对应的星历信息，和/或，源服务小区的相邻小区对应的星历信息。
  14. 根据权利要求13所述的终端，其中，所述星历信息，为：
    源服务小区的源通信设备通过系统广播发送给所述终端；
    或者，所述源服务小区的源通信设备通过专用信令配置给所述终端。
  15. 根据权利要求11-14任一项所述的终端，其中，所述终端还包括：
    处理单元，在确定符合所述第一预设条件时，开启定时器。
  16. 根据权利要求15所述的终端，其中，所述处理单元，根据源服务小区对应的星历信息、相邻小区对应的星历信息、所述定时器的当前值中至少之一，确定候选小区；其中，所述候选小区为所述终端预判处于其覆盖范围的小区；
    所述通信单元，根据所述候选小区的相关信息，对所述候选小区进行搜索，将搜索到的候选小区作为目标小区。
  17. 根据权利要求16所述的终端，其中，所述候选小区的相关信息，包括以下至少之一：
    候选小区的标识信息、候选小区的频点信息。
  18. 根据权利要求17所述的终端，其中，所述通信单元，搜索到所述 候选小区、并且所述候选小区满足S准则，则将所述候选小区作为所述目标小区。
  19. 根据权利要求18所述的终端，其中，所述处理单元，确定所述候选小区满足S准则时，停止所述定时器。
  20. 根据权利要求13-19任一项所述的终端，其中，源服务小区为：所述终端符合第一预设条件的情况下的最后一个服务小区。
  21. 一种终端，包括：处理器和用于存储能够在处理器上运行的计算机程序的存储器，
    其中，该存储器用于存储计算机程序，所述处理器用于调用并运行所述存储器中存储的计算机程序，执行如权利要求1-10任一项所述方法的步骤。
  22. 一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1-10中任一项所述的方法。
  23. 一种计算机可读存储介质，所述计算机可读存储介质用于存储计算机程序，所述计算机程序使得计算机执行如权利要求1-10任一项所述方法的步骤。
  24. 一种计算机程序产品，包括计算机程序指令，该计算机程序指令使得计算机执行如权利要求1-10中任一项所述的方法。
  25. 一种计算机程序，所述计算机程序使得计算机执行如权利要求1-10中任一项所述的方法。
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114142963A (zh) * 2021-11-30 2022-03-04 航天新通科技有限公司 一种小区搜索方法、系统及存储介质
CN114285460A (zh) * 2021-12-31 2022-04-05 浙江时空道宇科技有限公司 卫星测控方法、装置、电子设备、存储介质及程序产品
WO2023174286A1 (zh) * 2022-03-14 2023-09-21 展讯通信（上海）有限公司 一种卫星通信方法、装置、芯片和电子设备
WO2023197962A1 (zh) * 2022-04-11 2023-10-19 维沃移动通信有限公司 获取卫星辅助信息的方法、设备及可读存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140024363A1 (en) * 2005-09-15 2014-01-23 At&T Mobility Ii Llc Location based services quality assessment
CN103675853A (zh) * 2012-08-31 2014-03-26 迈实电子(上海)有限公司 同步导航电文的方法、接收机及装置
US20160323032A1 (en) * 2015-05-01 2016-11-03 Qualcomm Incorporated Handoff for non-geosynchronous satellite communication
CN108737959A (zh) * 2018-05-25 2018-11-02 西安邮电大学 基于精密单点定位的5g超密集网络切换方法
CN110493833A (zh) * 2019-08-29 2019-11-22 中国电子科技集团公司第五十四研究所 一种用于低轨卫星移动通信系统的终端自主切换控制方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110536477B (zh) * 2019-04-03 2023-11-14 中兴通讯股份有限公司 连接方法、装置、网络设备及存储介质

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140024363A1 (en) * 2005-09-15 2014-01-23 At&T Mobility Ii Llc Location based services quality assessment
CN103675853A (zh) * 2012-08-31 2014-03-26 迈实电子(上海)有限公司 同步导航电文的方法、接收机及装置
US20160323032A1 (en) * 2015-05-01 2016-11-03 Qualcomm Incorporated Handoff for non-geosynchronous satellite communication
CN108737959A (zh) * 2018-05-25 2018-11-02 西安邮电大学 基于精密单点定位的5g超密集网络切换方法
CN110493833A (zh) * 2019-08-29 2019-11-22 中国电子科技集团公司第五十四研究所 一种用于低轨卫星移动通信系统的终端自主切换控制方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Solutions for NR to support non-terrestrial networks (NTN) (Release 16)", 3GPP STANDARD; TECHNICAL REPORT; 3GPP TR 38.821, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG3, no. V1.0.0, 2 December 2019 (2019-12-02), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, pages 1 - 143, XP051840691 *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114142963A (zh) * 2021-11-30 2022-03-04 航天新通科技有限公司 一种小区搜索方法、系统及存储介质
CN114142963B (zh) * 2021-11-30 2023-12-12 航天新通科技有限公司 一种小区搜索方法、系统及存储介质
CN114285460A (zh) * 2021-12-31 2022-04-05 浙江时空道宇科技有限公司 卫星测控方法、装置、电子设备、存储介质及程序产品
CN114285460B (zh) * 2021-12-31 2024-04-19 浙江时空道宇科技有限公司 卫星测控方法、装置、电子设备、存储介质及程序产品
WO2023174286A1 (zh) * 2022-03-14 2023-09-21 展讯通信（上海）有限公司 一种卫星通信方法、装置、芯片和电子设备
WO2023197962A1 (zh) * 2022-04-11 2023-10-19 维沃移动通信有限公司 获取卫星辅助信息的方法、设备及可读存储介质

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