WO2021159463A1 - 小区选择方法、装置、设备及存储介质 - Google Patents

小区选择方法、装置、设备及存储介质 Download PDF

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Publication number
WO2021159463A1
WO2021159463A1 PCT/CN2020/075259 CN2020075259W WO2021159463A1 WO 2021159463 A1 WO2021159463 A1 WO 2021159463A1 CN 2020075259 W CN2020075259 W CN 2020075259W WO 2021159463 A1 WO2021159463 A1 WO 2021159463A1
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WIPO (PCT)
Prior art keywords
network device
information
terminal device
cell
network
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PCT/CN2020/075259
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English (en)
French (fr)
Inventor
李海涛
尤心
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Oppo广东移动通信有限公司
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Priority to CN202080093901.3A priority Critical patent/CN115004722A/zh
Priority to PCT/CN2020/075259 priority patent/WO2021159463A1/zh
Publication of WO2021159463A1 publication Critical patent/WO2021159463A1/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 embodiments of the present application relate to the field of communication technologies, and in particular, to a cell selection method, device, device, and storage medium.
  • NTN Non Terrestrial Network
  • 5G NR New Radio
  • NTN generally uses satellite communication to provide communication services to ground users. Compared with terrestrial cellular network communication system, NTN system has many unique advantages. First of all, the NTN system is not limited by the user's geographic area. Since a satellite can cover a larger ground and the satellite can orbit the earth, theoretically every corner of the earth can be covered by the NTN system. Secondly, the NTN system has greater social value. The NTN system 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. It is conducive to narrowing the digital gap with developed regions and promoting the development of these regions. Thirdly, the NTN system is far away, and the communication distance increases and the cost of communication does not increase significantly. Finally, the NTN system has high stability and is not restricted by natural disasters.
  • the embodiments of the present application provide a cell selection method, device, equipment, and storage medium.
  • the technical solution is as follows:
  • an embodiment of the present application provides a cell selection method, which is applied to a terminal device, and the method includes:
  • the cell corresponding to the first network device is selected as the camping cell.
  • an embodiment of the present application provides a cell selection method, which is applied to a network device, and the method includes:
  • Sending first information to a terminal device where the first information includes device information of the first network device, and the first information is used for the terminal device to determine the positional relationship between it and the first network device, The position relationship is used for the terminal device to select a cell to camp on.
  • an embodiment of the present application provides a cell selection device, which is applied to a terminal device, and the device includes:
  • a relationship determining module configured to determine a position relationship between the terminal device and a first network device according to first information, the first information including device information of the first network device;
  • the cell selection module is configured to select the cell corresponding to the first network device as the camping cell when the position relationship meets the first condition.
  • an embodiment of the present application provides a cell selection device, which is applied to a network device, and the device includes:
  • the information sending module is configured to send first information to the terminal device, the first information includes the device information of the first network device, and the first information is used for the terminal device to determine its relationship with the first network device The positional relationship between the two, the positional relationship is used for the terminal device to select a cell to camp on.
  • an embodiment of the present application provides a terminal device, the terminal device including a processor and a transceiver connected to the processor; wherein:
  • the processor is configured to determine a position relationship between the terminal device and a first network device according to first information, where the first information includes device information of the first network device;
  • the processor is further configured to select a cell corresponding to the first network device as a camping cell when the location relationship meets a first condition.
  • an embodiment of the present application provides a network device, the network device including a processor and a transceiver connected to the processor; wherein:
  • the transceiver is used to send first information to the terminal device, the first information includes the device information of the first network device, and the first information is used for the terminal device to determine its connection with the first network The location relationship between the devices, where the location relationship is used for the terminal device to select a cell to camp on.
  • an embodiment of the present application provides a computer-readable storage medium in which a computer program is stored, and the computer program is used to be executed by a processor of a terminal device to implement the above-mentioned cell on the terminal device side. Method of choosing.
  • an embodiment of the present application provides a computer-readable storage medium in which a computer program is stored, and the computer program is used to be executed by a processor of a network device to implement the above-mentioned cell on the network device side. Method of choosing.
  • an embodiment of the present application provides a chip that includes a programmable logic circuit and/or program instructions.
  • the chip runs on a terminal device, it is used to implement cell selection on the terminal device side as described above. method.
  • an embodiment of the present application provides a chip that includes a programmable logic circuit and/or program instructions.
  • the chip runs on a network device, it is used to implement cell selection on the network device side as described above. method.
  • the terminal device determines the location relationship between it and the network device according to the device information of the network device, and then selects the cell corresponding to the network device as the camping cell when the location relationship meets certain conditions, thereby providing a terminal-based
  • the location relationship between the device and the network device selects the method of camping on the cell.
  • the positional relationship between the terminal device and different network devices is more obvious, even if the terminal device has measurement and calculation errors when determining the positional relationship between the terminal device and the network device, it can be compared.
  • the terminal equipment is closer to the center of the service range of the network equipment or the edge of the service range of the network equipment, so it can provide a more accurate reference for the terminal equipment to select the camping cell to improve the selection of the camping cell The accuracy of the results.
  • the camping cell is the cell selected by the terminal device during cell selection or reselection of the target cell
  • the technical solution provided in the embodiments of the present application can improve the accuracy of the camping cell selection result, which prevents the terminal device from camping on the target cell. Insufficient cell selection may result in no network service or poor network service, thereby improving the network service quality of the terminal device, and improving the access efficiency of the terminal device during subsequent random access, or improving the terminal device Handover efficiency during subsequent cell handover.
  • the terminal device to obtain the device information of the network device, for example, pre-configured in the USIM card, carried in the system message or carried in the RRC message, thereby improving the terminal device to obtain the network device.
  • the flexibility of the device information because the device information of the network device can include the device information of all network devices in the communication system, the terminal device only needs to obtain the device information of the network device once and store it, which can be used in the subsequent random access process or cell handover process. It is used multiple times in the medium to avoid the need for the terminal device to obtain the device information of the network device multiple times, and reduces the processing overhead of the terminal device.
  • the terminal device may simultaneously consider the position relationship between the terminal device and the network device and the channel quality measurement result of the cell corresponding to the network device when selecting the camping cell. In this case, only when the location relationship meets a certain condition and the channel quality measurement result meets another condition, the terminal device determines the camping cell. Due to the combined consideration of multiple reference factors, the determination of the location relationship provided in the embodiments of the present application can make up for the error of the channel quality measurement result, solve the problem of inaccurate selection of the camping cell in the related technology, and further improve the accuracy of the selection result of the camping cell sex.
  • FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application.
  • Figure 2 is a schematic diagram of a network architecture provided by another embodiment of the present application.
  • FIG. 3 is a schematic diagram of a network architecture provided by another embodiment of the present application.
  • Fig. 4 is a flowchart of a cell selection method provided by an embodiment of the present application.
  • FIG. 5 is a flowchart of a cell selection method provided by another embodiment of the present application.
  • Fig. 6 is a flowchart of a cell selection method provided by still another embodiment of the present application.
  • FIG. 7 is a flowchart of a cell selection method provided by another embodiment of the present application.
  • FIG. 8 is a flowchart of a method for determining a position relationship provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a method for determining a position relationship provided by an embodiment of the present application.
  • FIG. 10 is a flowchart of a method for determining a position relationship provided by another embodiment of the present application.
  • FIG. 11 is a schematic diagram of a method for determining a position relationship provided by another embodiment of the present application.
  • FIG. 12 is a flowchart of a method for determining a position relationship provided by another embodiment of the present application.
  • FIG. 13 is a schematic diagram of a method for determining a position relationship provided by still another embodiment of the present application.
  • FIG. 14 is a block diagram of a cell selection device provided by an embodiment of the present application.
  • FIG. 15 is a block diagram of a cell selection device provided by another embodiment of the present application.
  • FIG. 16 is a block diagram of a cell selection device provided by another embodiment of the present application.
  • FIG. 17 is a structural block diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 18 is a structural block diagram of a network device provided by an embodiment of the present application.
  • FIG. 1 shows a schematic diagram of a network architecture provided by an embodiment of the present application.
  • the network architecture may include: a network device 10 and a terminal device 20.
  • the network device 10 is a device for providing wireless communication services for the terminal device 20.
  • a connection can be established between the network device 10 and the terminal device 20 through an air interface, so as to communicate through the connection, including the interaction of signaling and data.
  • the terminal device 20 can switch between different network devices 10, that is, establish a connection with different network devices 10.
  • the network device 10 in the NTN network may be a satellite 11.
  • a satellite 11 can cover a certain range of the ground area and provide wireless communication services for the terminal devices 20 on the ground area.
  • the satellite 11 can orbit the earth, and by arranging multiple satellites 11, communication coverage of different areas on the earth's surface can be achieved.
  • Satellite communication is not restricted by the user area.
  • 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.
  • 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.
  • LEO Low-Earth Orbit
  • MEO Medium-Earth Orbit
  • GEO Global-Earth Orbit, geosynchronous orbit
  • HEO High Elliptical Orbit (highly elliptical orbit) satellites and so on.
  • LEO Low-Earth Orbit
  • MEO Medium-Earth Orbit
  • GEO Global-Earth Orbit
  • HEO High Elliptical Orbit (highly elliptical orbit) satellites and so on.
  • the main research at this stage is LEO and GEO.
  • the altitude of low-orbit satellites ranges from 500km to 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.
  • 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.
  • the network device 10 in the cellular communication network may be a base station 12.
  • the base station 12 is a device deployed in an access network to provide a wireless communication function for the terminal device 20.
  • the base station 12 may include various forms of macro base stations, micro base stations, relay stations, access points, and so on.
  • the names of devices with network device functions may be different.
  • gNodeB or gNB With the evolution of communication technology, the name "base station" may change.
  • the above-mentioned devices that provide wireless communication functions for the terminal device 20 are collectively referred to as network devices.
  • the terminal device 20 involved in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to wireless modems, as well as various forms of users.
  • Equipment User Equipment, UE
  • MS Mobile Station
  • Terminal Equipment terminal device
  • the technical solutions provided by the embodiments of the present application may be applicable to NTN systems, and may also be applicable to cellular network systems.
  • a basic condition for a terminal device to be able to camp in a cell normally is that the cell can provide a service level that satisfies the S criterion, that is, only when the measurement and evaluation result of a cell meets the S criterion. May become the target cell for cell selection and reselection.
  • S Code stipulates:
  • Qrxlevmeas is RSRP (Reference Signal Receiving Power) obtained by actual measurement and calculation of terminal equipment.
  • Qqualmeas is RSRQ (Reference Signal Receiving Quality, reference signal receiving quality) obtained by actual measurement and calculation of terminal equipment.
  • Qrxlevmin is the minimum received power RSRP required by the network equipment.
  • Qqualmin is the minimum signal quality RSRQ required by the network equipment.
  • Qrxlevminoffset and Qqualminoffset are used to prevent the ping-pong effect between two PLMNs (Public Land Mobile Network) due to fluctuations in the radio environment.
  • PLMNs Public Land Mobile Network
  • Pcompensation is power compensation, for example, when the maximum transmission power allowed by the network device is greater than the maximum uplink transmission power determined by the terminal device's own capabilities, the power compensation caused by the low power of the terminal device.
  • Qoffsettemp is only used in special scenarios and is not applicable under normal circumstances, such as the "Chiba Problem" scenario.
  • RSRP represents the received power of the reference signal
  • Qrxlevmeas–(Qrxlevmin+Qrxlevminoffset) indicates the quality of the downlink received signal
  • Pcompensation indicates the quality of the uplink transmitted signal. Therefore, compared to RSRP, Srxlev is evaluated by considering the power of the uplink and downlink signals and can be expressed The evaluation value of the service quality that the cell can provide.
  • RSRQ as a signal quality metric that takes into account RSRP and total received power (including interference and noise influence), can provide a more reliable evaluation basis than RSRP, so Squal also represents the cell service level. Srxlev and Squal can comprehensively evaluate the quality of service that the cell can provide. Therefore, the S criterion becomes the basic evaluation condition for whether the cell can reside.
  • the spatial path loss of the terrestrial cellular network varies greatly, even if the terminal equipment has a certain measurement error in the process of measuring RSRP and RSRQ, as long as the measured value of RSRP and RSRQ is greater than a certain threshold, it can still characterize the terminal equipment
  • the signal quality to the network device can be used for normal connection establishment and data transmission.
  • the spatial path loss changes with different locations will not change significantly. If only considering the error of the RSRP/RSRQ measurement value, it will no longer be able to accurately describe the location of the terminal device within the service coverage of the network device.
  • the terminal device For example, suppose that for different locations within the service coverage of a network device, the range of RSRP that the terminal device can measure is -4dB to 4dB. At this time, if the RSRP measurement error is 4dB, and the RSRP value actually measured by the terminal device Is 0, then the terminal device will not be able to determine whether it is close to the center of the network device or the edge position of the network device. In this case, if the S criterion for cell selection in the cellular network system is still used, the terminal device will probably Because of RSRP measurement errors, wrong judgments are made when selecting a cell to camp on, which may cause problems such as subsequent cell access failures and reduce cell access efficiency.
  • the embodiments of the present application provide a cell selection method, device, equipment, and storage medium.
  • the terminal device determines the location relationship between it and the network device according to the device information of the network device, and then when the location relationship meets certain conditions, the cell corresponding to the network device is selected as
  • the camping cell provides a specific method for selecting the camping cell.
  • since the positional relationship between the terminal device and different network devices is more obvious, even if the terminal device has measurement and calculation errors when determining the positional relationship between the terminal device and the network device, it can be compared.
  • the terminal equipment is closer to the center of the service range of the network equipment or the edge of the service range of the network equipment, so it can provide a more accurate reference for the terminal equipment to select the camping cell to improve the selection of the camping cell The accuracy of the results.
  • the camping cell is the cell selected by the terminal device during cell selection or reselection of the target cell
  • the technical solution provided in the embodiments of the present application can improve the accuracy of the camping cell selection result, which prevents the terminal device from camping on the target cell. Insufficient cell selection may result in no network service or poor network service, thereby improving the network service quality of the terminal device, and improving the access efficiency of the terminal device during subsequent random access, or improving the terminal device Handover efficiency during subsequent cell handover.
  • the terminal device to obtain the device information of the network device, for example, pre-configured in the USIM card, carried in the system message or carried in the RRC message, thereby improving the terminal device to obtain the network device.
  • the flexibility of the device information because the device information of the network device can include the device information of all network devices in the communication system, the terminal device only needs to obtain the device information of the network device once and store it, which can be used in the subsequent random access process or cell handover process. It is used multiple times in the medium to avoid the need for the terminal device to obtain the device information of the network device multiple times, and reduces the processing overhead of the terminal device.
  • the terminal device may simultaneously consider the position relationship between the terminal device and the network device and the channel quality measurement result of the cell corresponding to the network device when selecting the camping cell. In this case, only when the location relationship meets a certain condition and the channel quality measurement result meets another condition, the terminal device determines the camping cell. Due to the combined consideration of multiple reference factors, the determination of the location relationship provided in the embodiments of the present application can make up for the error of the channel quality measurement result, solve the problem of inaccurate selection of the camping cell in the related technology, and further improve the accuracy of the selection result of the camping cell sex.
  • FIG. 4 shows a flowchart of a cell selection method provided by an embodiment of the present application.
  • the method can be applied to the network architecture shown in FIG. 1 to FIG. 3.
  • the method may include the following steps (410 ⁇ 420):
  • Step 410 The terminal device determines the position relationship between the terminal device and the first network device according to the first information.
  • the terminal device After the terminal device obtains the first information, it can determine the position relationship between the terminal device and the first network device by means of measurement, calculation, etc. according to the first information.
  • the embodiment of the present application does not limit the specific manifestation of the position relationship.
  • the position relationship can be expressed as the distance between the terminal device and the first network device, or as the inclination of the connection between the terminal device and the first network device and the ground horizontal line, or as the terminal The distance between the device and the center point of the ground coverage of the first network device.
  • the first information refers to the device information of the network device, which is used for the terminal device to measure the position relationship between the terminal device and the network device in the process of cell selection or reselection of the target cell, so as to determine the network service level of the network device.
  • the device information of the network device includes, but is not limited to: the location information of the network device, the coverage information of the network device, and the service beam information of the network device; in the NTN system, the network device can realize In the case of a satellite, at this time, the device information of the network device includes but is not limited to: the ephemeris information of the network device, the coverage center point of the network device, the service beam information of the network device, and the coverage information of the network device.
  • the first information includes device information of the first network device, where the first network device is a network device that can currently provide network services for terminal devices.
  • the first network device is a network device that can currently provide network services for terminal devices.
  • the first information may also include device information of other network devices other than the first network device.
  • the first information may include device information of all network devices in the communication system. . Since the location and range of activities of the terminal device are uncertain, the network device corresponding to the network service it can receive is also uncertain.
  • the embodiment of the present application includes the information of all network devices in the first information, so that When the terminal device is in any position, it can obtain the device information of the network device corresponding to the network service it can currently receive, so as to realize the timely determination of the network service level of the network device.
  • the terminal device can obtain the first information.
  • the first information can be pre-configured in the USIM (Universal Subscriber Identity Module, Global Subscriber Identity Module) of the terminal device, for example, the operator
  • the first information can be configured in the USIM in advance, so that the terminal device can directly obtain the first information when using the USIM card; or the first information can be carried in a system message and sent to the terminal device, for example,
  • the network device may pre-configure the first information, and then when broadcasting the system message to the terminal devices within its service range, the first information is carried in the system message, so that the terminal device can obtain the first information; or, the first information may be The bearer is sent to the terminal device in RRC (Radio Resource Control) signaling.
  • RRC Radio Resource Control
  • the network device can pre-configure the first information, and then when sending the RRC signaling to the terminal device that successfully accesses the network device,
  • the RRC signaling carries the first information, so that the terminal device can obtain the first information.
  • the embodiment of the present application improves the flexibility of obtaining the first information by the terminal device by providing multiple methods for obtaining the first information.
  • the first information can include the device information of all network devices in the communication system, after the terminal device obtains the first information, the first information can be stored for later cell selection or reselection of the target cell. Use it twice to avoid the need for the terminal device to obtain the first information again every time the terminal device selects or reselects the target cell, which reduces the processing overhead of the terminal device.
  • the method further includes step 402: the network device sends the first information to the terminal device. Since the first information may be pre-configured by the network device, in this case, the network device needs to send the first information to the terminal device, so that the terminal device can obtain the first information.
  • the network device may carry the first information in the system message; when the terminal device is connected to the network device, the network device may carry the first information in the system message.
  • One piece of information, the first piece of information may also be carried in the RRC signaling.
  • Step 404 The terminal device obtains cell information of the first cell.
  • the first cell refers to a cell that can currently provide network services for the terminal device.
  • the first cell is used for the terminal device to select a cell to camp on.
  • the terminal device can obtain the cell information of the first cell at the current location through measurement, etc.
  • the cell information of a certain cell refers to the information used to uniquely identify the cell.
  • the cell information includes: PCI (Physical Cell Identity, Physical cell identification) and/or frequency point information, that is, in the embodiment of this application, the cell information may include only PCI; it may also include frequency point information; it may also include both PCI and frequency point information.
  • PCI and frequency point information can be used as cell information at the same time.
  • This application The embodiment does not limit this.
  • Step 406 The terminal device determines the first network device from the at least one network device according to the cell information of the cell corresponding to the at least one network device and the cell information of the first cell.
  • the cell information of the cell corresponding to at least one network device may be carried in the first information.
  • the terminal device obtains the first information, it also obtains the cell information of the cell corresponding to the at least one network device; it may also be used as a separate piece of information.
  • Information can be pre-configured in the USIM card of the terminal device, can also be carried in system messages, and can also be carried in RRC signaling.
  • the terminal device may obtain the information in the same manner as obtaining the first information, or may obtain the information in a manner different from obtaining the first information, which is not limited in the embodiment of the present application.
  • the at least one network device may be all network devices in the communication system where the terminal device is located.
  • the cell information of the cell corresponding to the at least one network device That is, the cell information corresponding to all network devices.
  • the cell corresponding to at least one network device includes the first cell, and the at least one network device includes the first network device.
  • the terminal device obtains the cell information of the cell corresponding to at least one network device, it also obtains the correspondence between the at least one network device and the cell, so that the terminal device can combine the cell information of the first cell with the at least one network device.
  • the cell information of the corresponding cell finds the network device corresponding to the first cell, that is, the first network device, to complete the step of determining the first network device from at least one network device.
  • the cell information of the cell corresponding to at least one network device may be given in the form of a table, from which the cell identity of a certain cell can be mapped to its corresponding network device.
  • Step 420 When the location relationship meets the first condition, the terminal device selects the cell corresponding to the first network device as the camping cell.
  • the terminal device After the terminal device determines the location relationship between it and the first network device, it can select a camping cell based on the location relationship, and the camping cell refers to a candidate cell that the terminal device can access. Optionally, the terminal device selects the cell corresponding to the first network device as the camping cell when the location relationship meets the first condition.
  • the first condition may be pre-configured by the network device, or pre-defined in the protocol, or specifically determined by the terminal device according to the determination of the location relationship. For example, assuming that the location relationship is distance, the terminal device When the distance between it and multiple network devices is determined, multiple distances can be obtained.
  • the terminal device can determine the first condition according to the specific values of the multiple distances, such as determining that the first condition is the largest value, or determining the first condition A condition is that the value is within a certain numerical interval, or the first condition is determined that the value is less than a certain threshold, so that according to the first condition, the terminal device can select a distance that satisfies the first condition from a plurality of distances, and determine that the first condition is satisfied.
  • the cell corresponding to the network device corresponding to the distance of a condition is the camping cell. Since in actual applications, there may be multiple network devices that can currently provide network services for terminal devices, the first condition is determined by the terminal device, and the value of the first condition can be determined flexibly according to actual scenarios.
  • the above method further includes the following steps (430-440):
  • Step 430 The terminal device obtains the channel quality measurement result of the cell corresponding to the first network device.
  • the terminal device can measure and calculate the network service level of a cell that can currently provide network services for it.
  • the network service level may be represented by the channel quality measurement result.
  • the channel quality measurement result may include RSRP, RSRQ, SINR (Signal to Noise Ratio), RSSI (Received Signal Strength Indication, received signal strength indication) ), etc.
  • the embodiment of the present application does not limit the specific content of the channel quality measurement result.
  • step 410 may be executed first, or step 430 may be executed first, or step 410 and step 430 may be executed simultaneously.
  • Fig. 7 only takes step 410 as an example for illustration.
  • step 440 the terminal device selects the cell corresponding to the first network device as the camping cell when the location relationship meets the first condition and the channel quality measurement result meets the second condition.
  • the position of the terminal device between it and the first network device On the basis that the relationship satisfies the first condition, the cell corresponding to the first network device may be selected as the camping cell when the channel quality measurement result of the cell corresponding to the first network device satisfies the second condition.
  • the second condition may be pre-configured by the network device, or pre-defined in the protocol, and may also be specifically determined by the terminal device according to the channel quality measurement results actually obtained.
  • the embodiment of the present application does not limit the specific determination method of the second condition.
  • the second condition includes: the channel quality measurement result satisfies the S criterion.
  • S criterion For the specific introduction and description of the S criterion, please refer to the above-mentioned embodiment for details, and will not be repeated here.
  • the first network device may include multiple network devices.
  • the embodiment of the present application only takes the first network device to represent one network device as an example for illustration. After the technical solution, it is easy to think that the first network device includes multiple network devices, which should all fall within the protection scope of this application.
  • the technical solutions provided by the embodiments of the present application determine the location relationship between the terminal device and the network device according to the device information of the network device, and then select the corresponding network device when the location relationship meets certain conditions.
  • the cell of is a camping cell, which provides a method for selecting a camping cell based on the positional relationship between terminal equipment and network equipment.
  • the positional relationship between the terminal device and different network devices is more obvious, even if the terminal device has measurement and calculation errors when determining the positional relationship between the terminal device and the network device, it can be compared.
  • the terminal equipment is closer to the center of the service range of the network equipment or the edge of the service range of the network equipment, so it can provide a more accurate reference for the terminal equipment to select the camping cell to improve the selection of the camping cell The accuracy of the results.
  • the camping cell is the cell selected by the terminal device during cell selection or reselection of the target cell
  • the technical solution provided in the embodiments of the present application can improve the accuracy of the camping cell selection result, which prevents the terminal device from camping on the target cell. Insufficient cell selection may result in no network service or poor network service, thereby improving the network service quality of the terminal device, and improving the access efficiency of the terminal device during subsequent random access, or improving the terminal device Handover efficiency during subsequent cell handover.
  • the terminal device to obtain the device information of the network device, for example, pre-configured in the USIM card, carried in the system message or carried in the RRC message, thereby improving the terminal device to obtain the network device.
  • the flexibility of the device information because the device information of the network device can include the device information of all network devices in the communication system, the terminal device only needs to obtain the device information of the network device once and store it, which can be used in the subsequent random access process or cell handover process. It is used multiple times in the medium to avoid the need for the terminal device to obtain the device information of the network device multiple times, and reduces the processing overhead of the terminal device.
  • the terminal device may simultaneously consider the position relationship between the terminal device and the network device and the channel quality measurement result of the cell corresponding to the network device when selecting the camping cell. In this case, only when the location relationship meets a certain condition and the channel quality measurement result meets another condition, the terminal device determines the camping cell. Due to the combined consideration of multiple reference factors, the determination of the location relationship provided in the embodiments of the present application can make up for the error of the channel quality measurement result, solve the problem of inaccurate selection of the camping cell in the related technology, and further improve the accuracy of the selection result of the camping cell sex.
  • step 410 includes the following steps (412-414):
  • Step 412 The terminal device determines the location of the first network device according to the device information of the first network device.
  • the device information of the first network device may directly show the location of the first network device, or indirectly show the location of the first network device.
  • the network device when the communication system is a terrestrial cellular network system, the network device is usually implemented as a base station.
  • the device information of the first network device may include the location information of the first network device, and the location information indicates the location information of the first network device. Location.
  • the terminal device can directly determine the location of the first network device according to the device information of the first network device.
  • the network equipment when the communication system is an NTN system, the network equipment is usually implemented as a satellite. However, due to the mobility of the satellite, the position of the satellite is different at different times. At this time, the satellite’s information cannot be directly shown in the equipment information. Location.
  • the device information of the first network device includes the ephemeris information of the first network device
  • the ephemeris information includes: the orbit information of the first network device and the reference location information of the first network device
  • the reference time information of the first network device and the reference speed information of the first network device where the reference location information may include the initial location of the first network device, the reference time information may include the initial time of the first network device, and the reference speed information It may include the initial speed of the first network device.
  • the terminal device may substitute the ephemeris information in the device information into the position calculation function to calculate the position of the first network device.
  • the reference location information of the first network device is associated with the reference time information of the first network device, that is, the reference location information of the first network device is location information associated with the reference time of the first network device.
  • the location calculation function may be pre-configured by the network to the terminal device, or may be pre-defined in the protocol, which is not limited in the embodiment of the present application.
  • Step 414 The terminal device determines the distance between the terminal device and the first network device according to the location of the terminal device and the location of the first network device.
  • the positional relationship between the terminal device and the first network device may be expressed as the distance between the terminal device and the first network device.
  • the terminal device After the terminal device determines the location of the first network device, it can calculate the distance between it and the first network device based on its own location and the location of the first network device.
  • the terminal device has positioning capabilities and can obtain its own location information. As shown in Figure 9, suppose that the first network device includes three network devices, namely network device 1, network device 2, and network device 3.
  • the terminal device can learn its own location according to the positioning ability, and according to the device of the first network device
  • the information determines the current positions of network device 1, network device 2, and network device 3 respectively, and then calculates the distance between network device 1, network device 2 and network device 3 according to the positioning ability, and marks them as d1, d2 respectively And d3.
  • the foregoing first condition includes: the distance between the terminal device and the first network device belongs to the first value range.
  • the first condition includes that the distance between the terminal equipment and the first network equipment belongs to The first value range, not less than a certain threshold.
  • the first value range is determined according to the specific network device, that is, the first value range and the first value range There is a correspondence between network devices.
  • network device 1 network device 2, and network device 3
  • different value ranges can be applied respectively.
  • network device 1, network device 2 and network device 3 are respectively Corresponding to value range 1, value range 2 and value range 3, when determining whether the position relationship satisfies the first condition, the terminal device judges whether d1 is within value range 1, d2 is within value range 2, and Whether d3 is within the value range 3.
  • the value range may also be the same, which is not limited in the embodiment of the present application.
  • the first value range may be pre-configured by the network device, or may be pre-defined in the protocol.
  • the first value range may be included in the first information, so as to prevent the network device from acquiring information multiple times and reduce the processing overhead of the network device.
  • the foregoing first condition may further include: the distance between the terminal device and the network device is less than a preset threshold.
  • the first condition may indicate that the distance between the terminal device and the network device is relatively short, and the channel quality is better. If the first condition is satisfied, the terminal device can be considered to have received the network service of the first network device well.
  • the technical solutions provided by the embodiments of the present application in the case that the positional relationship between the terminal device and the network device is expressed as the distance between the terminal device and the network device, the terminal device is used according to the device information of the network device, Determine the location of the network device, and then determine the distance between it and the network device based on its own location and the location of the network device, providing a specific way to determine the location relationship between the terminal device and the network device.
  • the embodiments of the present application respectively propose the conditions that need to be met when selecting a camping cell for the NTN system and the terrestrial cellular network system, and realize the specific determination of the conditions that need to be met during the selection of the camping cell according to the characteristics of different communication systems.
  • the technical solutions provided in the embodiments of the present application are applicable in different communication systems.
  • step 410 includes the following steps (41A to 41C):
  • Step 41A The terminal device determines the location of the first network device according to the device information of the first network device.
  • step 41A in this embodiment can be obtained.
  • step 41A please refer to the description of step 412 above, which will not be repeated here.
  • the device information of the first network device includes the ephemeris information of the first network device, where the ephemeris information includes: the orbit information of the first network device and the reference position of the first network device Information, the reference time information of the first network device, and the reference speed information of the first network device.
  • the ephemeris information includes: the orbit information of the first network device and the reference position of the first network device Information, the reference time information of the first network device, and the reference speed information of the first network device.
  • Step 41C The terminal device determines the inclination of the connection between the terminal device and the first network device and the ground horizontal line according to the location of the terminal device and the location of the first network device.
  • the positional relationship between the terminal device and the first network device may be expressed as an inclination angle between the connection line between the terminal device and the first network device and the ground horizontal line.
  • the terminal device After the terminal device determines the location of the first network device, it can calculate the inclination angle between its connection with the first network device and the ground horizontal line according to its own location and the location of the first network device.
  • the terminal device has positioning capabilities and can obtain its own location information. As shown in Figure 11, the terminal device is located within the service range of the first network device. It can learn its own location based on the positioning capability, determine the location of the first network device based on the device information of the first network device, and then determine the location of the first network device based on its own location. The position and the position of the first network device are determined, and the inclination angle between the connection line with the first network device and the ground horizontal line is determined, which is recorded as the inclination angle alpha.
  • the above first condition includes: the difference between the inclination angle of the connection between the terminal device and the first network device and the ground level and the first inclination angle is less than the first threshold, where the first An inclination angle refers to the inclination angle between the connection line between the first network device and the first reference position and the ground horizontal line.
  • the first threshold may be pre-configured by the network device, or may be pre-defined by the protocol, or may be determined by the terminal device in combination with actual conditions, which is not limited in the embodiment of the present application.
  • the first threshold may be included in the device information of the first network device.
  • the connection line between the network equipment and a certain point on the ground usually deviates from the horizontal line to form an inclination.
  • the first reference position is used to represent a certain point on the ground.
  • the first reference position may include the ground coverage center point of the first network device.
  • the device information of the first network device includes angular beam information of the first network device, wherein the angular beam information includes the first tilt angle.
  • the network equipment Since in the NTN system, the network equipment has two mobile modes, one is that the service range is changed, and the inclination angle is unchanged; the other is that the service range is unchanged, and the inclination angle is changed.
  • the embodiment in FIG. 10 provides a terminal device for the first type. A method for determining the position relationship between it and the network device.
  • the embodiment in FIG. 12 provides a method for the terminal device to determine the position relationship between it and the network device for the second type. The first type will be discussed here.
  • the first reference location is the ground coverage center point of the first network device, denoted as point A.
  • the first network device moves, its service range changes, and the ground coverage center point moves from point A to Point B, but the inclination angle of the connection between the first network device and the ground coverage center point and the ground horizontal line has not changed, that is, the inclination of the connection between the first network device and the ground coverage center point and the ground horizontal line is equal to the inclination of the connection with point B and the ground horizontal line inclination.
  • angle beam information can be added to the device information of the first network device.
  • the angle beam information is used to indicate that the beam (service range) of the cell corresponding to the first network device follows the It moves while moving, but the inclination angle between the beam and the first reference position remains unchanged, that is, the first inclination angle remains unchanged.
  • an embodiment of the present application proposes a method for setting the first condition, that is, setting the first condition is that the difference between the inclination angle of the connection between the terminal device and the first network device and the ground horizontal line and the first inclination angle is smaller than the first threshold.
  • the terminal device After the terminal device determines the inclination angle between its connection with the first network device and the ground horizontal line, if the inclination angle is less than the first threshold, it can determine that the first condition is satisfied, and select the cell corresponding to the first network device as camping Community.
  • the terminal device when the positional relationship between the terminal device and the network device is shown as the inclination of the connection between the terminal device and the network device and the ground horizontal line, the terminal device according to the network device Determine the location of the network device based on the device information of the network device, and then determine the inclination of its connection with the network device to the ground horizontal line based on its own location and the location of the network device, providing a specific way to determine the position relationship between the terminal device and the network device The way.
  • the embodiments of this application aim at the situation where the service range changes when the network equipment in the NTN system moves, but the inclination angle between the connection to the ground reference position and the ground horizontal line does not change, and provides a specific setting for the selection of the camping cell.
  • the difference between the inclination of the connection between the terminal device and the network device and the ground horizontal line and the inclination of the connection between the network device and the ground reference position and the ground horizontal The inclination angle of the connection line and the ground horizontal line is compared with a certain threshold or a certain value range. It is necessary to specifically determine the conditions that need to be met when selecting a camping cell for each network device.
  • the technical solution provided by the embodiment of the application reduces the network device Or the operator’s processing overhead also reduces the storage pressure of the terminal equipment.
  • step 410 includes the following steps (41B to 41D):
  • Step 41B The terminal device determines the second reference position according to the device information of the first network device.
  • the second reference position refers to a certain position on the ground.
  • the second reference position may include the ground coverage center point of the first network device.
  • the second reference position may be included in the device information of the first network device, so that the terminal device may directly determine the second reference position after determining the first network device;
  • the second reference location may also be calculated by the terminal device according to the device information of the first network device. For example, assuming that the terminal device determines that the second reference location is the ground coverage center point, the terminal device obtains it according to the device information of the first network device. After the coverage of the first network device, the second reference position can be calculated based on the coverage.
  • Step 41D The terminal device determines the distance between the terminal device and the second reference position.
  • the position relationship between the terminal device and the first network device may be expressed as the distance between the terminal device and the second reference position.
  • the terminal device After the terminal device determines the second reference position, it can calculate its distance from the second reference position according to its own position and the second reference position.
  • the terminal device has positioning capabilities and can obtain its own location information. As shown in Figure 13, the terminal device is located within the service range of the first network device. It can learn its own location based on its positioning capability, and determine the second reference location based on the device information of the first network device, denoted as point C, and then According to its own position and the second reference position, determine the distance between it and the second reference position, denoted as d.
  • the foregoing first condition includes: the distance between the terminal device and the second reference position is less than the second threshold.
  • the second threshold may be pre-configured by the network device, or may be pre-defined by the protocol, or may be determined by the terminal device in combination with actual conditions, which is not limited in the embodiment of the present application.
  • the second threshold may be included in the device information of the first network device.
  • the device information of the first network device includes the coverage location information of the first network device, and the coverage location information includes the second reference location.
  • the embodiment of FIG. 10 two types of network equipment in the NTN system are introduced.
  • the embodiment of FIG. 12 is aimed at the terminal equipment provided by the second type of network equipment to determine the position between it and the network equipment.
  • the way of relationship As shown in Figure 11, suppose that the second reference location is the ground coverage center point of the first network device, denoted as point C. After the first network device moves, its service range does not change, so the ground coverage center point does not change either .
  • coverage location information can be added to the device information of the first network device.
  • the coverage location information is used to indicate the beam direction (service range) of the cell corresponding to the first network device. However, the service range of the first network device remains unchanged.
  • the technical solution provided by the embodiments of the present application in the case that the positional relationship between the terminal device and the network device is expressed as the distance between the terminal device and the ground reference position, the terminal device is used according to the device information of the network device , Determine the ground reference position, and then determine the distance between it and the ground reference position according to its own position and ground reference position, providing a specific way to determine the position relationship between the terminal device and the network device.
  • the embodiments of this application provide a way to specifically set the conditions that need to be met in the camping cell for the situation where the beam direction changes but the service range does not change when the network equipment in the NTN system moves, so that the terminal equipment can determine it. Whether it is close to the center of the network equipment or close to the edge of the network equipment provides a specific way of judging, which is convenient for the terminal equipment to judge the positional relationship between it and the network equipment.
  • the technical solution of the present application is introduced and explained mainly from the perspective of interaction between the network device and the terminal device.
  • the above-mentioned steps performed by the terminal device can be individually implemented as a cell selection method on the terminal device side; the above-mentioned steps performed by the network device can be individually implemented as a cell selection method on the network device side.
  • FIG. 14 shows a block diagram of a cell selection apparatus provided by an embodiment of the present application.
  • the device has the function of realizing the above-mentioned method example on the terminal device side, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device can be the terminal device described above, or it can be set in the terminal device.
  • the apparatus 1400 may include: a relationship determination module 1410 and a cell selection module 1420.
  • the relationship determination module 1410 is configured to determine the position relationship between the terminal device and the first network device according to first information, where the first information includes device information of the first network device.
  • the cell selection module 1420 is configured to select a cell corresponding to the first network device as a camping cell when the location relationship meets the first condition.
  • the relationship determining module 1410 includes: a first location determining sub-module 1412, configured to determine the location of the first network device according to the device information of the first network device;
  • a distance determining submodule 1414 is configured to determine the distance between the terminal device and the first network device according to the location of the terminal device and the location of the first network device.
  • the first condition includes: the distance between the terminal device and the first network device belongs to a first value range.
  • the relationship determining module 1410 includes: a second position determining sub-module 141A, configured to determine the position of the first network device according to the device information of the first network device;
  • the determining sub-module 141C is configured to determine the inclination of the connection between the terminal device and the first network device and the ground horizontal line according to the location of the terminal device and the location of the first network device.
  • the first condition includes: the difference between the inclination angle of the connection between the terminal device and the first network device and the ground level and the first inclination angle is less than a first threshold; wherein, the first The inclination angle refers to the inclination angle between the connection line between the first network device and the first reference position and the ground horizontal line.
  • the first reference location includes a ground coverage center point of the first network device.
  • the device information of the first network device includes angular beam information of the first network device, and the angular beam information includes the first tilt angle.
  • the device information of the first network device includes ephemeris information of the first network device, and the ephemeris information includes: orbit information of the first network device and reference of the first network device Location information, reference time information of the first network device, and reference speed information of the first network device.
  • the relationship determining module 1410 includes: a third position determining sub-module 141B, configured to determine the second reference of the first network device according to the device information of the first network device Position; a second distance determination sub-module 141D for determining the distance between the terminal device and the second reference position.
  • the second reference position includes a ground coverage center point of the first network device.
  • the first condition includes: the distance between the terminal device and the second reference position is less than a second threshold.
  • the device information of the first network device includes coverage location information of the first network device, and the coverage location information includes a second reference location of the first network device.
  • the apparatus 1400 further includes: an information acquiring module 1430, configured to acquire cell information of a first cell, where the first cell is used for the terminal device to select the camping cell
  • the device determining module 1440 is configured to determine the first network device from the at least one network device according to the cell information of the cell corresponding to the at least one network device and the cell information of the first cell.
  • the cell information includes: physical cell identity PCI and/or frequency point information.
  • the first information is pre-configured in the global subscriber identity card USIM of the terminal device; or the first information is carried in a system message and sent to the terminal device; or The first information is carried in radio resource control RRC signaling and sent to the terminal device.
  • the apparatus 1400 further includes: a result obtaining module 1450, configured to obtain a channel quality measurement result of the cell corresponding to the first network device; the cell selection module 1420, further configured to In a case where the location relationship satisfies the first condition and the channel quality measurement result satisfies the second condition, the cell corresponding to the first network device is selected as the camping cell.
  • a result obtaining module 1450 configured to obtain a channel quality measurement result of the cell corresponding to the first network device
  • the cell selection module 1420 further configured to In a case where the location relationship satisfies the first condition and the channel quality measurement result satisfies the second condition, the cell corresponding to the first network device is selected as the camping cell.
  • the second condition includes: the channel quality measurement result satisfies the S criterion.
  • the technical solutions provided by the embodiments of the present application determine the location relationship between the terminal device and the network device according to the device information of the network device, and then select the corresponding network device when the location relationship meets certain conditions.
  • the cell of is a camping cell, which provides a method for selecting a camping cell based on the positional relationship between terminal equipment and network equipment.
  • the positional relationship between the terminal device and different network devices is more obvious, even if the terminal device has measurement and calculation errors when determining the positional relationship between the terminal device and the network device, it can be compared.
  • the terminal equipment is closer to the center of the service range of the network equipment or the edge of the service range of the network equipment, so it can provide a more accurate reference for the terminal equipment to select the camping cell to improve the selection of the camping cell The accuracy of the results.
  • the camping cell is the cell selected by the terminal device during cell selection or reselection of the target cell
  • the technical solution provided in the embodiments of the present application can improve the accuracy of the camping cell selection result, which prevents the terminal device from camping on the target cell. Insufficient cell selection may result in no network service or poor network service, thereby improving the network service quality of the terminal device, and improving the access efficiency of the terminal device during subsequent random access, or improving the terminal device Handover efficiency during subsequent cell handover.
  • FIG. 16 shows a block diagram of a cell selection apparatus provided by an embodiment of the present application.
  • the device has the function of realizing the example of the method on the network device side, and the function can be realized by hardware, or by hardware executing corresponding software.
  • the device can be the network device described above, or it can be set in the network device.
  • the apparatus 1600 may include: an information sending module 1610.
  • the information sending module 1610 is configured to send first information to the terminal device.
  • the first information includes the device information of the first network device, and the first information is used for the terminal device to determine its connection with the first network.
  • the location relationship between the devices where the location relationship is used for the terminal device to select a cell to camp on.
  • the first information is carried in a system message, or the first information is carried in radio resource control RRC signaling.
  • the technical solutions provided by the embodiments of the present application determine the location relationship between the terminal device and the network device according to the device information of the network device, and then select the corresponding network device when the location relationship meets certain conditions.
  • the cell of is a camping cell, which provides a method for selecting a camping cell based on the positional relationship between terminal equipment and network equipment.
  • the positional relationship between the terminal device and different network devices is more obvious, even if the terminal device has measurement and calculation errors when determining the positional relationship between the terminal device and the network device, it can be compared.
  • the terminal equipment is closer to the center of the service range of the network equipment or the edge of the service range of the network equipment, so it can provide a more accurate reference for the terminal equipment to select the camping cell to improve the selection of the camping cell The accuracy of the results.
  • the camping cell is the cell selected by the terminal device during cell selection or reselection of the target cell
  • the technical solution provided in the embodiments of the present application can improve the accuracy of the camping cell selection result, which prevents the terminal device from camping on the target cell. Insufficient cell selection may result in no network service or poor network service, thereby improving the network service quality of the terminal device, and improving the access efficiency of the terminal device during subsequent random access, or improving the terminal device Handover efficiency during subsequent cell handover.
  • the device provided in the above embodiment realizes its functions, only the division of the above-mentioned functional modules is used as an example for illustration. In actual applications, the above-mentioned functions can be allocated by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • FIG. 17 shows a schematic structural diagram of a terminal device 170 provided by an embodiment of the present application.
  • the terminal device may be the above-mentioned terminal device, which is used to execute the above-mentioned cell selection method on the terminal device side.
  • the terminal device 170 may include a processor 171, a receiver 172, a transmitter 173, a memory 174, and a bus 175.
  • the processor 171 includes one or more processing cores, and the processor 171 executes various functional applications and information processing by running software programs and modules.
  • the receiver 172 and the transmitter 173 may be implemented as a transceiver 176, and the transceiver 176 may be a communication chip.
  • the memory 174 is connected to the processor 171 through the bus 175.
  • the memory 174 may be used to store a computer program, and the processor 171 is used to execute the computer program to implement each step executed by the terminal in the foregoing method embodiment.
  • the memory 174 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile or non-volatile storage device includes but is not limited to: RAM (Random-Access Memory, random access memory) And ROM (Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory, Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory) Memory), flash memory or other solid-state storage technology, CD-ROM (Compact Disc Read-Only Memory), DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cartridges, magnetic tapes, disks Storage or other magnetic storage devices. in:
  • the processor 171 is configured to determine a position relationship between the terminal device and a first network device according to first information, where the first information includes device information of the first network device.
  • the processor 171 is configured to select a cell corresponding to the first network device as a camping cell when the location relationship meets a first condition.
  • the processor 171 is configured to: determine the location of the first network device according to the device information of the first network device; according to the location of the terminal device and the location of the first network device, Determine the distance between the terminal device and the first network device.
  • the first condition includes: the distance between the terminal device and the first network device belongs to a first value range.
  • the processor 171 is configured to: determine the location of the first network device according to the device information of the first network device; according to the location of the terminal device and the location of the first network device, Determine the inclination of the connection between the terminal device and the first network device and the ground horizontal line.
  • the first condition includes: the difference between the inclination angle of the connection between the terminal device and the first network device and the ground level and the first inclination angle is less than a first threshold; wherein, the first The inclination angle refers to the inclination angle between the connection line between the first network device and the first reference position and the ground horizontal line.
  • the first reference location includes a ground coverage center point of the first network device.
  • the device information of the first network device includes angular beam information of the first network device, and the angular beam information includes the first tilt angle.
  • the device information of the first network device includes ephemeris information of the first network device, and the ephemeris information includes: orbit information of the first network device and reference of the first network device Location information, reference time information of the first network device, and reference speed information of the first network device.
  • the processor 171 is configured to: determine the second reference position of the first network device according to the device information of the first network device; determine the distance between the terminal device and the second reference position the distance.
  • the second reference position includes a ground coverage center point of the first network device.
  • the first condition includes: the distance between the terminal device and the second reference position is less than a second threshold.
  • the device information of the first network device includes coverage location information of the first network device, and the coverage location information includes a second reference location of the first network device.
  • the transceiver 176 is configured to obtain cell information of a first cell, where the first cell is used for the terminal device to select the camping cell; the processor 171 is also configured to obtain cell information according to at least The cell information of the cell corresponding to one network device and the cell information of the first cell are used to determine the first network device from the at least one network device.
  • the cell information includes: physical cell identity PCI and/or frequency point information.
  • the first information is pre-configured in the global subscriber identity card USIM of the terminal device; or the first information is carried in a system message and sent to the terminal device; or The first information is carried in radio resource control RRC signaling and sent to the terminal device.
  • the transceiver 176 is further configured to obtain the channel quality measurement result of the cell corresponding to the first network device; the processor 171 is further configured to satisfy the first condition when the positional relationship is satisfied, And when the channel quality measurement result satisfies the second condition, the cell corresponding to the first network device is selected as the camping cell.
  • the second condition includes: the channel quality measurement result satisfies the S criterion.
  • FIG. 18 shows a schematic structural diagram of a network device 180 provided by an embodiment of the present application.
  • the network device may be the above-mentioned network device for executing the above-mentioned cell selection method on the network device side.
  • the network device 180 may include: a processor 181, a receiver 182, a transmitter 183, a memory 184, and a bus 185.
  • the processor 181 includes one or more processing cores, and the processor 181 executes various functional applications and information processing by running software programs and modules.
  • the receiver 182 and the transmitter 183 may be implemented as a transceiver 186, and the transceiver 186 may be a communication chip.
  • the memory 184 is connected to the processor 181 through the bus 185.
  • the memory 184 may be used to store a computer program, and the processor 181 is used to execute the computer program to implement each step executed by the network device in the foregoing method embodiment.
  • the memory 184 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile or non-volatile storage device includes but is not limited to: RAM (Random-Access Memory, random access memory) And ROM (Read-Only Memory), EPROM (Erasable Programmable Read-Only Memory, Erasable Programmable Read-Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory, Electrically Erasable Programmable Read-Only Memory) Memory), flash memory or other solid-state storage technology, CD-ROM (Compact Disc Read-Only Memory), DVD (Digital Video Disc, high-density digital video disc) or other optical storage, tape cartridges, magnetic tapes, disks Storage or other magnetic storage devices. in:
  • the transceiver 186 is configured to send first information to the terminal device.
  • the first information includes the device information of the first network device, and the first information is used for the terminal device to determine its relationship with the first network device.
  • the location relationship between network devices where the location relationship is used for the terminal device to select a cell to camp on.
  • the first information is carried in a system message, or the first information is carried in radio resource control RRC signaling.
  • the embodiment of the present application also provides a computer-readable storage medium in which a computer program is stored, and the computer program is used to be executed by a processor of a terminal device to implement the above-mentioned cell selection method on the terminal device side.
  • the embodiment of the present application also provides a computer-readable storage medium in which a computer program is stored, and the computer program is used to be executed by a processor of a network device to implement the above-mentioned cell selection method on the network device side.
  • the embodiment of the present application also provides a chip, which includes a programmable logic circuit and/or program instructions, and when the chip runs on a terminal device, it is used to implement the cell selection method on the terminal device side as described above.
  • the embodiment of the present application also provides a chip, the chip includes a programmable logic circuit and/or program instructions, when the chip runs on a network device, it is used to implement the cell selection method on the network device side as described above.
  • the present application also provides a computer program product, when the computer program product runs on the terminal device side computer, the computer is caused to execute the above-mentioned cell selection method on the terminal device side.
  • This application also provides a computer program product, which when the computer program product runs on a computer on the network device side, causes the computer to execute the above-mentioned cell selection method on the network device side.
  • Computer-readable media include computer storage media and communication media, where communication media includes any media that facilitates the transfer of computer programs from one place to another.
  • the storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.

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Abstract

一种小区选择方法、装置、设备及存储介质，涉及通信技术领域。所述方法包括：终端设备根据第一信息确定终端设备与第一网络设备之间的位置关系；终端设备在位置关系满足第一条件的情况下，选择第一网络设备对应的小区为驻留小区。提供了一种基于终端设备与网络设备之间的位置关系选择驻留小区的方法，由于终端设备与不同的网络设备之间的位置关系的差别较为明显，可以为终端设备选择驻留小区提供较为准确的参考，以提升驻留小区选择结果的准确性。另外，由于驻留小区是终端设备在小区选择或者重选目标小区时所选择的小区，从而也提升了终端设备后续进行随机接入时的接入效率，以及后续进行小区切换时的切换效率。

Description

小区选择方法、装置、设备及存储介质 技术领域
本申请实施例涉及通信技术领域，特别涉及一种小区选择方法、装置、设备及存储介质。
背景技术
3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)在5G NR(New Radio，新空口)系统中引入了NTN(Non Terrestrial Network，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。相比地面蜂窝网通信系统，NTN系统具有很多独特的优点。首先，NTN系统不受用户地域的限制，由于一颗卫星即可以覆盖较大的地面，且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NTN系统覆盖。其次，NTN系统有较大的社会价值，NTN系统在边远山区、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，NTN系统距离远，且通信距离增大通讯的成本没有明显增加。最后，NTN系统的稳定性高，不受自然灾害的限制。
在NTN技术中，由于UE(User Equipment，用户设备)与卫星之间的空间路损随距离变化不明显，针对UE如何选择合适的驻留小区，还需要进一步研究。
发明内容
本申请实施例提供了一种小区选择方法、装置、设备及存储介质。所述技术方案如下：
一方面，本申请实施例提供了一种小区选择方法，应用于终端设备中，所述方法包括：
根据第一信息确定所述终端设备与第一网络设备之间的位置关系，所述第一信息包括所述第一网络设备的设备信息；
在所述位置关系满足第一条件的情况下，选择所述第一网络设备对应的小区为驻留小区。
另一方面，本申请实施例提供了一种小区选择方法，应用于网络设备中，所述方法包括：
向终端设备发送第一信息，所述第一信息包括第一网络设备的设备信息，且所述第一信息用于供所述终端设备确定其与所述第一网络设备之间的位置关系，所述位置关系用于供所述终端设备选择驻留小区。
再一方面，本申请实施例提供了一种小区选择装置，应用于终端设备中，所述装置包括：
关系确定模块，用于根据第一信息确定所述终端设备与第一网络设备之间的位置关系，所述第一信息包括所述第一网络设备的设备信息；
小区选择模块，用于在所述位置关系满足第一条件的情况下，选择所述第一网络设备对应的小区为驻留小区。
又一方面，本申请实施例提供了一种小区选择装置，应用于网络设备中，所述装置包括：
信息发送模块，用于向终端设备发送第一信息，所述第一信息包括第一网络设备的设备信息，且所述第一信息用于供所述终端设备确定其与所述第一网络设备之间的位置关系，所述位置关系用于供所述终端设备选择驻留小区。
还一方面，本申请实施例提供了一种终端设备，所述终端设备包括处理器和与所述处理器相连的收发器；其中：
所述处理器，用于根据第一信息确定所述终端设备与第一网络设备之间的位置关系，所述第一信息包括所述第一网络设备的设备信息；
所述处理器，还用于在所述位置关系满足第一条件的情况下，选择所述第一网络设备对应的小区为驻留小区。
还一方面，本申请实施例提供了一种网络设备，所述网络设备包括处理器和与所述处理器相连的收发器；其中：
所述收发器，用于向终端设备发送第一信息，所述第一信息包括第一网络设备的设备信息，且所述第一信息用于供所述终端设备确定其与所述第一网络设备之间的位置关系，所述位置关系用于供所述终端设 备选择驻留小区。
还一方面，本申请实施例提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被终端设备的处理器执行，以实现上述终端设备侧的小区选择方法。
还一方面，本申请实施例提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被网络设备的处理器执行，以实现上述网络设备侧的小区选择方法。
还一方面，本申请实施例提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在终端设备上运行时，用于实现如上述终端设备侧的小区选择方法。
还一方面，本申请实施例提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在网络设备上运行时，用于实现如上述网络设备侧的小区选择方法。
本申请实施例提供的技术方案可以包括如下有益效果：
通过终端设备根据网络设备的设备信息，确定其与网络设备之间的位置关系，然后在位置关系满足一定条件的情况下，选择网络设备对应的小区为驻留小区，从而提供了一种基于终端设备与网络设备之间的位置关系选择驻留小区的方法。并且，本申请实施例中，由于终端设备与不同的网络设备之间的位置关系的差别较为明显，即便终端设备在确定其与网络设备之间的位置关系时存在测量和计算误差，也可以较为清楚地反映终端设备是距离网络设备服务范围的中心位置较近，还是距离网络设备服务范围的边缘位置较近，因此可以为终端设备选择驻留小区提供较为准确的参考，以提升驻留小区选择结果的准确性。另外，由于驻留小区是终端设备在小区选择或者重选目标小区时所选择的小区，本申请实施例提供的技术方案可以提升驻留小区选择结果的准确性，也就避免了终端设备因为驻留小区选择不够准确可能造成的无网络服务或者网络服务较差的状态，从而提升了终端设备的网络服务质量，并且提升了终端设备后续进行随机接入时的接入效率，或者提升了终端设备后续进行小区切换时的切换效率。
另外，本申请实施例中，终端设备获取网络设备的设备信息有多种方式，例如，预配置在USIM卡中、承载在系统消息中或者承载在RRC消息中，从而提升了终端设备获取网络设备的设备信息的灵活性。并且，由于网络设备的设备信息可以包括通信系统中所有网络设备的设备信息，从而终端设备只需要获取一次网络设备的设备信息，并进行存储，即可在后续的随机接入过程或者小区切换过程中多次使用，避免终端设备需要多次获取网络设备的设备信息，降低了终端设备的处理开销。
另外，本申请实施例提供的技术方案中，终端设备在进行驻留小区选择时，可以同时考虑终端设备与网络设备之间的位置关系，和网络设备对应的小区的信道质量测量结果。这种情况下，在位置关系满足一定条件、且信道质量测量结果满足另一条件时，终端设备才进行驻留小区的确定。由于结合考虑了多种参考因素，本申请实施例提供的位置关系的确定可以弥补信道质量测量结果的误差，解决相关技术中驻留小区选择不准确的问题，进一步提升驻留小区选择结果的准确性。
附图说明
图1是本申请一个实施例提供的网络架构的示意图；
图2是本申请另一个实施例提供的网络架构的示意图；
图3是本申请另一个实施例提供的网络架构的示意图；
图4是本申请一个实施例提供的小区选择方法的流程图；
图5是本申请另一个实施例提供的小区选择方法的流程图；
图6是本申请再一个实施例提供的小区选择方法的流程图；
图7是本申请又一个实施例提供的小区选择方法的流程图；
图8是本申请一个实施例提供的位置关系确定方法的流程图；
图9是本申请一个实施例提供的位置关系确定方法的示意图；
图10是本申请另一个实施例提供的位置关系确定方法的流程图；
图11是本申请另一个实施例提供的位置关系确定方法的示意图；
图12是本申请又一个实施例提供的位置关系确定方法的流程图；
图13是本申请再一个实施例提供的位置关系确定方法的示意图；
图14是本申请一个实施例提供的小区选择装置的框图；
图15是本申请另一个实施例提供的小区选择装置的框图；
图16是本申请又一个实施例提供的小区选择装置的框图；
图17是本申请一个实施例提供的终端设备的结构框图；
图18是本申请一个实施例提供的网络设备的结构框图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
本申请实施例描述的网络架构以及业务场景是为了更加清楚地说明本申请实施例的技术方案，并不构成对本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题，同样适用。
请参考图1，其示出了本申请一个实施例提供的网络架构的示意图。该网络架构可以包括：网络设备10和终端设备20。
网络设备10是用于为终端设备20提供无线通信服务的设备。网络设备10与终端设备20之间可以通过空口建立连接，从而通过该连接进行通信，包括信令和数据的交互。网络设备10的数量可以有多个，两个邻近的网络设备10之间也可以通过有线或者无线的方式进行通信。终端设备20可以在不同的网络设备10之间进行切换，也即与不同的网络设备10建立连接。
在一个示例中，如图2所示，以NTN网络为例，NTN网络中的网络设备10可以是卫星11。一颗卫星11可以覆盖一定范围的地面区域，为该地面区域上的终端设备20提供无线通信服务。另外，卫星11可以围绕地球做轨道运动，通过布设多个卫星11，可以实现对地球表面的不同区域的通信覆盖。
相比于地面的蜂窝通信网络，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。目前阶段主要研究的是LEO和GEO。
1、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。
2、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。
在另一个示例中，如图3所示，以蜂窝通信网络为例，蜂窝通信网络中的网络设备10可以是基站12。基站12是一种部署在接入网中用以为终端设备20提供无线通信功能的装置。基站12可以包括各种形式的宏基站，微基站，中继站，接入点等等。在采用不同的无线接入技术的系统中，具备网络设备功能的设备的名称可能会有所不同，例如在5G NR(New Radio，新空口)系统中，称为gNodeB或者gNB。随着通信技术的演进，“基站”这一名称可能会变化。为方便描述，本申请实施例中，上述为终端设备20提供无线通信功能的装置统称为网络设备。
另外，本申请实施例中涉及的终端设备20，可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(User Equipment，UE)，移动台(Mobile Station，MS)，终端设备(terminal device)等等。为方便描述，本申请实施例中，上面提到的设备统称为终端设备。
另外，在本申请实施例中，名词“网络”和“系统”通常混用，但本领域技术人员可以理解其含义。
本申请实施例提供的技术方案，可以适用于NTN系统，也可以适用于蜂窝网络系统。
在蜂窝网络系统中，终端设备能正常驻留到一个小区的一个基本条件是该小区可以提供满足S准则的服务水平，也就是说，只有在一个小区的测量评估结果满足S准则时，才有可能成为小区选择和重选的目标小区。S准则规定：
Srxlev>0且Squal>0
其中，Srxlev和Squal的表达式分别如下所示：
Srxlev＝Qrxlevmeas–(Qrxlevmin+Qrxlevminoffset)–Pcompensation–Qoffsettemp
Squal＝Qqualmeas–(Qqualmin+Qqualminoffset)-Qoffsettemp
对于上述表达式中出现的各个参数的含义作如下解释：
Qrxlevmeas为终端设备实际测量计算得到的RSRP(Reference Signal Receiving Power，参考信号接收功率)。
Qqualmeas为终端设备实际测量计算得到的RSRQ(Reference Signal Receiving Quality，参考信号接收质量)。
Qrxlevmin为网络设备要求的最小接收功率RSRP。
Qqualmin为网络设备要求的最小信号质量RSRQ。
Qrxlevminoffset和Qqualminoffset为防止两个PLMN(Public Land Mobile Network，公共陆地移动网络)之间由于无线电环境波动产生的乒乓效应的偏移量，也就是说，Qrxlevminoffset和Qqualminoffset分别为终端设备驻留在VPLMN(Visited Public Land Mobile Network，访问公共陆地移动网络)上周期性搜索更高优先级的PLMN时需要考虑的对Qrxlevmin和Qqualmin的偏移量。
Pcompensation为功率补偿，例如当网络设备允许的最大发射功率大于终端设备自身能力决定的最大上行发射功率时，由于终端设备功率低导致的功率补偿。
Qoffsettemp仅用于特殊场景，正常情况不适用，例如“千叶问题”场景。
由于RSRP表示参考信号接收功率，Qrxlevmeas–(Qrxlevmin+Qrxlevminoffset)指示下行接收信号质量，Pcompensation指示上行发送信号质量，因此Srxlev相对于RSRP，是综合考虑了上下行信号功率强度而评估出的、可以表示小区可提供的服务质量的评估值。RSRQ作为综合考虑了RSRP以及总接收功率(包括干扰和噪声影响)的信号质量度量值，可以提供比RSRP更可靠的评估依据，所以Squal也表示小区服务水平。由Srxlev和Squal可以较为全面的评估出小区可提供的服务质量。因此S准则成为小区是否可以驻留的基本评价条件。
由于地面蜂窝网络的空间路损变化较大，因此即便终端设备在测量RSRP和RSRQ的过程中存在一定的测量误差，只要RSRP和RSRQ的测量值大于一定的门限值，其仍能表征终端设备到网络设备的信号质量可用于正常的连接建立和数据传输。但是，在NTN系统中，由于卫星等网络设备与终端设备之间的距离过远，对于网络设备服务覆盖范围内的不同位置，空间路损变化随位置的不同而发生的改变不显著，此时，若仅考虑RSRP/RSRQ测量值的误差，将不再能准确地描述终端设备在网络设备服务覆盖范围内的位置。例如，假设对于网络设备服务覆盖范围内的不同位置，终端设备可以测量到的RSRP的数值范围为-4dB至4dB，此时若RSRP的测量误差为4dB，且终端设备实际测量得到的RSRP的数值为0，那么终端设备将不能确定自己是处于靠近网络设备的中心位置还是靠近网络设备的边缘位置，在这种情况下，如果仍采用蜂窝网络系统中进行小区选择的S准则，终端设备将可能因为RSRP测量误差，导致在选择驻留小区时做出错误的判断，以造成后续小区接入失败等问题，降低小区接入效率。
基于此，本申请实施例提供了一种小区选择方法、装置、设备及存储介质。在本申请实施例提供的技术方案中，通过终端设备根据网络设备的设备信息，确定其与网络设备之间的位置关系，然后在位置关系满足一定条件的情况下，选择网络设备对应的小区为驻留小区，从而提供了一种驻留小区的具体选择方法。并且，本申请实施例中，由于终端设备与不同的网络设备之间的位置关系的差别较为明显，即便终端设备在确定其与网络设备之间的位置关系时存在测量和计算误差，也可以较为清楚地反映终端设备是距离网络设备服务范围的中心位置较近，还是距离网络设备服务范围的边缘位置较近，因此可以为终端设备选择驻留小区提供较为准确的参考，以提升驻留小区选择结果的准确性。另外，由于驻留小区是终端设备在小区选择或者重选目标小区时所选择的小区，本申请实施例提供的技术方案可以提升驻留小区选择结果的准确性，也就避免了终端设备因为驻留小区选择不够准确可能造成的无网络服务或者网络服务较差的状态，从而提升了终端设备的网络服务质量，并且提升了终端设备后续进行随机接入时的接入效率，或者提升了终端设备后续进行小区切换时的切换效率。
另外，本申请实施例中，终端设备获取网络设备的设备信息有多种方式，例如，预配置在USIM卡中、承载在系统消息中或者承载在RRC消息中，从而提升了终端设备获取网络设备的设备信息的灵活性。并且，由于网络设备的设备信息可以包括通信系统中所有网络设备的设备信息，从而终端设备只需要获取一次网络设备的设备信息，并进行存储，即可在后续的随机接入过程或者小区切换过程中多次使用，避免终端设备需要多次获取网络设备的设备信息，降低了终端设备的处理开销。
另外，本申请实施例提供的技术方案中，终端设备在进行驻留小区选择时，可以同时考虑终端设备与网络设备之间的位置关系，和网络设备对应的小区的信道质量测量结果。这种情况下，在位置关系满足一定条件、且信道质量测量结果满足另一条件时，终端设备才进行驻留小区的确定。由于结合考虑了多种参考因素，本申请实施例提供的位置关系的确定可以弥补信道质量测量结果的误差，解决相关技术中驻留小区选择不准确的问题，进一步提升驻留小区选择结果的准确性。
下面，将结合几个示例性实施例，对本申请技术方案进行介绍说明。
请参考图4，其示出了本申请一个实施例提供的小区选择方法的流程图，该方法可应用于图1至图3所示的网络架构中，该方法可以包括如下几个步骤(410～420)：
步骤410，终端设备根据第一信息确定终端设备与第一网络设备之间的位置关系。
终端设备在获取到第一信息后，可以根据第一信息通过测量、计算等方式确定终端设备与第一网络设备之间的位置关系，本申请实施例对位置关系的具体表现形式不作限定，可选地，在NTN系统中，位置关系可以表示为终端设备与第一网络设备之间的距离，也可以表示为终端设备与第一网络设备的连线与地面水平线的倾角，还可以表示为终端设备与第一网络设备的地面覆盖中心点之间的距离。
第一信息是指网络设备的设备信息，用于供终端设备在小区选择或者重选目标小区的过程中对终端设备与网络设备之间的位置关系进行测量，以确定网络设备的网络服务水平。可选地，在地面蜂窝网系统中，网络设备的设备信息包括但不限于：网络设备的位置信息、网络设备的覆盖范围信息、网络设备的服务波束信息；在NTN系统中，网络设备可以实现为卫星时，此时，网络设备的设备信息包括但不限于：网络设备的星历信息、网络设备的覆盖地面中心点、网络设备的服务波束信息和网络设备的覆盖范围信息。
本申请实施例中，第一信息包括第一网络设备的设备信息，其中，第一网络设备是当前可以为终端设备提供网络服务的网络设备，有关第一网络设备的确定过程请参见下述图6所示的可选实施例，此处不再赘述。可选地，第一信息除了包括第一网络设备的设备信息，还可以包括第一网络设备之外的其它网络设备的设备信息，例如，第一信息可以包括通信系统中所有网络设备的设备信息。由于终端设备的位置和活动范围具有不确定性，其所能接收到的网络服务对应的网络设备也具有不确定性，本申请实施例通过在第一信息中包括所有网络设备的信息，可以使得终端设备处于任何位置时，都可以获取其当前所能接收到的网络服务对应的网络设备的设备信息，以实现及时对网络设备的网络服务水平的确定。
可选地，终端设备获取第一信息的方式多种多样，本申请实施例中，第一信息可以预配置在终端设备的USIM(Universal Subscriber Identity Module，全球用户识别卡)中，例如，运营商在生产USIM卡时，可以预先在USIM中配置第一信息，以使得终端设备使用该USIM卡时可以直接获取第一信息；或者，第一信息可以承载在系统消息中发送给终端设备，例如，网络设备可以预先配置第一信息，然后在向其服务范围内的终端设备广播系统消息时，在系统消息中携带该第一信息，以使得终端设备获取到第一信息；或者，第一信息可以承载在RRC(Radio Resource Control，无线资源控制)信令中发送给终端设备，例如，网络设备可以预先配置第一信息，然后在向成功接入该网络设备的终端设备发送RRC信令时，在RRC信令中携带该第一信息，以使得终端设备获取到第一信息。本申请实施例通过提供多种获取第一信息的方式，提升了终端设备获取第一信息的灵活性。并且，由于第一信息中可以包括通信系统中所有网络设备的设备信息，终端设备在获取到第一信息后，可以对第一信息进行存储，以在之后的小区选择或者重选目标小区时多次进行使用，避免终端设备每一次小区选择或者重选目标小区时，都需要再次获取第一信息，降低了终端设备的处理开销。
可选地，如图5所示，上述步骤410之前，还包括步骤402：网络设备向终端设备发送第一信息。由于第一信息可以由网络设备预先配置，这种情况下，网络设备需要向终端设备发送第一信息，以使得终端设备获取第一信息。可选地，在终端设备没有接入网络设备的情况下，网络设备可以在系统消息中携带第一信息；在终端设备接入网络设备的情况下，网络设备既可以在系统消息中携带该第一信息，也可以在RRC信令中携带第一信息。
在一个示例中，如图6所示，上述步骤410之前，还包括如下几个步骤(404～406)：
步骤404，终端设备获取第一小区的小区信息。
第一小区是指当前可以为终端设备提供网络服务的小区，本申请实施例中，第一小区用于供终端设备选择驻留小区。终端设备在当前位置可以通过测量等方式获取到第一小区的小区信息，某一小区的小区信息是指用于唯一标识该小区的信息，可选地，小区信息包括：PCI(Physical Cell Identity，物理小区标识)和/或频点信息，也即在本申请实施例中，小区信息既可以仅包括PCI；也可以仅包括频点信息；还可以既包括PCI，也包括频点信息，实际应用时考虑到处理开销等原因时，可以仅以PCI或者仅以频点信息作为小区信息；考虑到标识某一小区的准确性等原因时，可以同时以PCI和频点信息作为小区信息，本申请实施例对此不作限定。
步骤406，终端设备根据至少一个网络设备对应的小区的小区信息和第一小区的小区信息，从至少一个网络设备中确定第一网络设备。
可选地，至少一个网络设备对应的小区的小区信息可以承载在第一信息中，终端设备获取到第一信息时也就获取到至少一个网络设备对应的小区的小区信息；也可以单独作为一条信息，此时，该信息可以预配置在终端设备的USIM卡中，也可以承载在系统消息中，还可以承载在RRC信令中。另外，终端设备可以采用与获取第一信息相同的方式获取该信息，也可以采用与获取第一信息不同的方式获取该信息，本申请实施例对此不作限定。可选地，为了避免终端设备多次获取信息，降低终端设备的处理开销，至少一 个网络设备可以是终端设备所在的通信系统中的所有网络设备，此时至少一个网络设备对应的小区的小区信息也就是指所有网络设备对应的小区信息。
本申请实施例中，至少一个网络设备对应的小区中包括第一小区，至少一个网络设备中包括第一网络设备。终端设备获取到至少一个网络设备对应的小区的小区信息，也就获取到至少一个网络设备与小区之间的对应关系，从而终端设备可以根据获取到第一小区的小区信息，结合至少一个网络设备对应的小区的小区信息，查找到与第一小区对应的网络设备，即第一网络设备，以完成从至少一个网络设备中确定第一网络设备的步骤。可选地，至少一个网络设备对应的小区的小区信息可以表格的形式给出，从该表格中，可以根据某一小区的小区标识，映射到其所对应的网络设备。
步骤420，终端设备在位置关系满足第一条件的情况下，选择第一网络设备对应的小区为驻留小区。
终端设备确定其与第一网络设备之间的位置关系后，可以根据该位置关系选择驻留小区，驻留小区是指终端设备可以接入的候选小区。可选地，终端设备在位置关系满足第一条件的情况下，选择第一网络设备对应的小区为驻留小区。本申请实施例中，第一条件可以由网络设备预配置，也可以在协议中预先规定，还可以由终端设备根据位置关系的确定情况具体确定，例如，假设位置关系为距离，在终端设备对其与多个网络设备之间的距离进行确定时，可以得到多个距离，然后，终端设备可以根据多个距离的具体数值，确定第一条件，如确定第一条件为数值最大，或者确定第一条件为数值在一定的数值区间内，或者确定第一条件为数值小于某一阈值，从而根据第一条件，终端设备可以从多个距离中选取满足第一条件的距离，并确定该满足第一条件的距离对应的网络设备对应的小区为驻留小区。由于实际应用中，当前可以为终端设备提供网络服务的网络设备可能有多个，由终端设备确定第一条件，就可以灵活根据实际场景，具体确定第一条件的数值。
在一个示例中，如图7所示，上述方法还包括如下几个步骤(430～440)：
步骤430，终端设备获取第一网络设备对应的小区的信道质量测量结果。
本申请实施例中，终端设备可以对当前可以为其提供网络服务的小区的网络服务水平进行测量和计算。可选地，网络服务水平可以信道质量测量结果来表示，例如，信道质量测量结果可以包括RSRP、RSRQ、SINR(Signal to Noise Ratio，信噪比)、RSSI(Received Signal Strength Indication，接收信号强度指示)等，本申请实施例对信道质量测量结果的具体内容不作限定。
需要说明的一点是，本申请实施例对步骤410和步骤430的执行先后顺序不作限定，实际应用中，既可以先执行步骤410，也可以先执行步骤430，还可以同时执行步骤410和步骤430，图7仅以先执行步骤410为例进行举例说明。
步骤440，终端设备在位置关系满足第一条件，且信道质量测量结果满足第二条件的情况下，选择第一网络设备对应的小区为驻留小区。
为了使得驻留小区的选择更为准确，提升终端设备后续执行随机接入时的接入效率，或者提升终端设备执行小区切换时的切换效率，终端设备在其与第一网络设备之间的位置关系满足第一条件的基础上，可以进一步在第一网络设备对应的小区的信道质量测量结果满足第二条件的情况下，选择第一网络设备对应的小区为驻留小区。
第二条件可以由网络设备预配置，也可以在协议中预先规定，还可以由终端设备根据实际获取的信道质量测量结果具体确定，本申请实施例对第二条件的具体确定方式不作限定。可选地，第二条件包括：信道质量测量结果满足S准则。有关S准则的具体介绍说明，详见上述实施例，此处不再赘述。
需要说明的一点是，第一网络设备可以包括多个网络设备，本申请实施例为了方便描述，仅以第一网络设备表示一个网络设备为例进行举例说明，本领域技术人员在了解了本申请的技术方案后，将很容易想到第一网络设备包括多个网络设备的情况，这些均应属于本申请的保护范围之内。
综上所述，本申请实施例提供的技术方案，通过终端设备根据网络设备的设备信息，确定其与网络设备之间的位置关系，然后在位置关系满足一定条件的情况下，选择网络设备对应的小区为驻留小区，从而提供了一种基于终端设备与网络设备之间的位置关系选择驻留小区的方法。并且，本申请实施例中，由于终端设备与不同的网络设备之间的位置关系的差别较为明显，即便终端设备在确定其与网络设备之间的位置关系时存在测量和计算误差，也可以较为清楚地反映终端设备是距离网络设备服务范围的中心位置较近，还是距离网络设备服务范围的边缘位置较近，因此可以为终端设备选择驻留小区提供较为准确的参考，以提升驻留小区选择结果的准确性。另外，由于驻留小区是终端设备在小区选择或者重选目标小区时所选择的小区，本申请实施例提供的技术方案可以提升驻留小区选择结果的准确性，也就避免了终端设备因为驻留小区选择不够准确可能造成的无网络服务或者网络服务较差的状态，从而提升了终端设备的网络服务质量，并且提升了终端设备后续进行随机接入时的接入效率，或者提升了终端设备后续进行小区切换时的切换效率。
另外，本申请实施例中，终端设备获取网络设备的设备信息有多种方式，例如，预配置在USIM卡中、承载在系统消息中或者承载在RRC消息中，从而提升了终端设备获取网络设备的设备信息的灵活性。并 且，由于网络设备的设备信息可以包括通信系统中所有网络设备的设备信息，从而终端设备只需要获取一次网络设备的设备信息，并进行存储，即可在后续的随机接入过程或者小区切换过程中多次使用，避免终端设备需要多次获取网络设备的设备信息，降低了终端设备的处理开销。
另外，本申请实施例提供的技术方案中，终端设备在进行驻留小区选择时，可以同时考虑终端设备与网络设备之间的位置关系，和网络设备对应的小区的信道质量测量结果。这种情况下，在位置关系满足一定条件、且信道质量测量结果满足另一条件时，终端设备才进行驻留小区的确定。由于结合考虑了多种参考因素，本申请实施例提供的位置关系的确定可以弥补信道质量测量结果的误差，解决相关技术中驻留小区选择不准确的问题，进一步提升驻留小区选择结果的准确性。
在一种可能的实施方式中，如图8所示，上述步骤410包括如下几个步骤(412～414)：
步骤412，终端设备根据第一网络设备的设备信息，确定第一网络设备的位置。
本申请实施例中，第一网络设备的设备信息可以直接示出第一网络设备的位置，也可以间接示出第一网络设备的位置。
在一个示例中，当通信系统为地面蜂窝网系统时，网络设备通常实现为基站，此时第一网络设备的设备信息可以包括第一网络设备的位置信息，该位置信息指示第一网络设备的位置。终端设备根据第一网络设备的设备信息，可以直接确定第一网络设备的位置。
在另一个示例中，在通信系统为NTN系统时，网络设备通常实现为卫星，而由于卫星具有移动性，在不同时刻卫星的位置也是不同的，此时无法直接在设备信息中示出卫星的位置，基于此，本申请实施例中，第一网络设备的设备信息包括第一网络设备的星历信息，该星历信息包括：第一网络设备的轨道信息、第一网络设备的参考位置信息、第一网络设备的参考时刻信息和第一网络设备的参考速度信息，其中，参考位置信息可以包括第一网络设备的初始位置，参考时刻信息可以包括第一网络设备的初始时刻，参考速度信息可以包括第一网络设备的初始速度。终端设备根据第一网络设备的设备信息，可以将设备信息中的星历信息代入位置计算函数，以计算得到第一网络设备的位置。可选地，第一网络设备的参考位置信息与第一网络设备的参考时刻信息相关联，即第一网络设备的参考位置信息是与第一网络设备的参考时刻相关联的位置信息。可选地，该位置计算函数可以是网络预先配置给终端设备的，也可以是在协议中预先规定的，本申请实施例对此不作限定。
步骤414，终端设备根据终端设备的位置和第一网络设备的位置，确定终端设备与第一网络设备之间的距离。
终端设备与第一网络设备之间的位置关系可以表现为终端设备与第一网络设备之间的距离。在终端设备确定第一网络设备的位置后，即可根据自身的位置与第一网络设备的位置，计算其与第一网络设备之间的距离。可选地，终端设备具备定位能力，可以获取自身的位置信息。如图9所示，假设第一网络设备中包括三个网络设备，分别为网络设备1、网络设备2、网络设备3，终端设备可以根据定位能力获知自身的位置，根据第一网络设备的设备信息分别确定网络设备1、网络设备2和网络设备3的当前位置，然后再根据定位能力计算其分别与网络设备1、网络设备2和网络设备3之间的距离，并分别记为d1、d2和d3。
在一个示例中，基于上述步骤412至步骤414，上述第一条件包括：终端设备与第一网络设备之间的距离属于第一取值范围。在NTN系统中，由于网络设备(卫星)通常与地面之间存在一定的距离，终端设备不可能无限制接近网络设备，因此第一条件包括的是终端设备与第一网络设备之间的距离属于第一取值范围，而不是小于某一阈值。可选地，由于网络设备通常位于不同的轨道，不同网络设备与地面之间的距离并不一定相同，因而第一取值范围是根据具体的网络设备确定的，即第一取值范围与第一网络设备之间存在对应关系，如图9所示，针对网络设备1、网络设备2和网络设备3，可以分别适用不同的取值范围，假设网络设备1、网络设备2和网络设备3分别对应取值范围1、取值范围2和取值范围3，终端设备在确定位置关系是否满足第一条件时，是分别判断d1是否在取值范围1内、d2是否在取值范围2内、d3是否在取值范围3内。可选地，针对不同的网络设备，取值范围也可以是相同的，本申请实施例对此不作限定。可选地，该第一取值范围可以由网络设备预先配置，也可以在协议中预先规定。可选地，该第一取值范围可以包括在第一信息中，以避免网络设备多次获取信息，降低网络设备的处理开销。
在另一个示例中，基于上述步骤412至步骤414，上述第一条件还可以包括：终端设备与网络设备之间的距离小于预设阈值。第一条件可以表示终端设备与网络设备之间的距离较近因而信道质量较好，满足第一条件即可认为终端设备较好地接收到第一网络设备的网络服务。
综上所述，本申请实施例提供的技术方案，在终端设备与网络设备之间的位置关系表现为终端设备与网络设备之间的距离的情况下，通过终端设备根据网络设备的设备信息，确定网络设备的位置，然后根据自身的位置和网络设备的位置，确定其与网络设备之间的距离，提供了一种具体确定终端设备与网络设备之间的位置关系的方式。并且，本申请实施例针对NTN系统和地面蜂窝网系统，分别提出了驻留小区选择时需要满足的条件，实现了根据不同通信系统的特点，具体确定驻留小区选择时需要满足的条件，从而 本申请实施例提供的技术方案在不同的通信系统中均可以适用。
在另一种可能的实施方式中，如图10所示，上述步骤410包括如下几个步骤(41A～41C)：
步骤41A，终端设备根据第一网络设备的设备信息，确定第一网络设备的位置。
基于上述图8实施例中步骤412的介绍说明，可以得到此实施例中步骤41A的介绍说明。有关步骤41A的详细介绍说明，请参见上述步骤412的介绍说明，此处不再赘述。
在一个示例中，基于上述步骤41A，上述第一网络设备的设备信息包括第一网络设备的星历信息，其中，星历信息包括：第一网络设备的轨道信息、第一网络设备的参考位置信息、第一网络设备的参考时刻信息和第一网络设备的参考速度信息。有关星历信息的介绍说明等，请参见上述图8实施例，此处不再赘述。
步骤41C，终端设备根据终端设备的位置和第一网络设备的位置，确定终端设备与第一网络设备的连线与地面水平线的倾角。
终端设备与第一网络设备之间的位置关系可以表现为终端设备与第一网络设备的连线与地面水平线的倾角。在终端设备确定第一网络设备的位置后，即可根据自身的位置与第一网络设备的位置，计算其与第一网络设备的连线与地面水平线的倾角。可选地，终端设备具备定位能力，可以获取自身的位置信息。如图11所示，终端设备位于第一网络设备的服务范围之内，其可以根据定位能力获知自身的位置，根据第一网络设备的设备信息确定第一网络设备的位置，然后再根据自身的位置和第一网络设备的位置，确定其与第一网络设备的连线与地面水平线的倾角，记为倾角alpha。
在一个示例中，基于上述步骤41A至41C，上述第一条件包括：终端设备与第一网络设备的连线与地面水平线的倾角和第一倾角之间的差值小于第一阈值，其中，第一倾角是指第一网络设备与第一参考位置的连线与地面水平线的倾角。可选地，第一阈值可以由网络设备预先配置，也可以由协议预先规定，还可以由终端设备结合实际情况确定，本申请实施例对此不作限定。可选地，第一阈值可以包括在第一网络设备的设备信息中。在NTN系统中，由于网络设备(卫星)通常与地面之间存在一定的距离，因此网络设备与地面上的某一点连线通常偏离水平线而形成倾角。本申请实施例中，以第一参考位置表示地面上的某一点，可选地，为方便确定第一参考位置，该第一参考位置可以包括第一网络设备的地面覆盖中心点。
在一个示例中，基于上述步骤41A至41C和上述第一条件，上述第一网络设备的设备信息包括第一网络设备的角度波束信息，其中，角度波束信息包括第一倾角。由于在NTN系统中，网络设备具有两种移动方式，一种是服务范围改变，倾角不变；另一种是服务范围不变，倾角改变，图10实施例针对第一种类型提供了终端设备确定其与网络设备之间的位置关系的方式，图12实施例针对第二种类型提供了终端设备确定其与网络设备之间的位置关系的方式，此处先讨论第一种类型。如图11所示，假设第一参考位置为第一网络设备的地面覆盖中心点，记为点A，第一网络设备移动后，其服务范围发生了改变，地面覆盖中心点由点A移动到点B，但是第一网络设备与地面覆盖中心点的连线与地面水平线的倾角没有发生改变，即其与点A的连线与地面水平线的倾角等于其与点B的连线与地面水平线的倾角。针对这一类型的网络设备，可以在第一网络设备的设备信息中添加角度波束信息，该角度波束信息用于指示第一网络设备对应的小区的波束(服务范围)随着第一网络设备的移动而移动，但是该波束与第一参考位置之间的倾角保持不变，即第一倾角保持不变。
由于在NTN系统中，不同的网络设备对应的小区的波束方向可能也是不相同的，即假设两个网络设备的服务范围一样，这两个网络设备的位置是不一样的，此时若直接采用终端设备至网络设备的连线与地面水平线的倾角满足第一条件，则需要针对每一个网络设备，都设置第一条件，这样可能会给网络设备或者运营商带来巨大的处理开销，以及给终端设备带来较大的存储压力。基于此，本申请实施例提出一种设置第一条件的方式，即设置第一条件为终端设备与第一网络设备的连线与地面水平线的倾角与第一倾角的差值小于第一阈值。终端设备确定其与第一网络设备的连线与地面水平线的倾角后，在该倾角小于第一阈值的情况下，即可确定满足第一条件，并选择第一网络设备对应的小区为驻留小区。
综上所述，本申请实施例提供的技术方案，在终端设备与网络设备之间的位置关系表现为终端设备与网络设备的连线与地面水平线的倾角的情况下，通过终端设备根据网络设备的设备信息，确定网络设备的位置，然后根据自身的位置和网络设备的位置，确定其与网络设备的连线与地面水平线的倾角，提供了一种具体确定终端设备与网络设备之前的位置关系的方式。并且，本申请实施例针对NTN系统中网络设备移动时，服务范围发生改变，但是与地面参考位置的连线与地面水平线的倾角不变的情况，提供一种具体设置驻留小区选择时需要满足的条件的方式，即终端设备与网络设备的连线与地面水平线的倾角和网络设备与地面参考位置的连线与地面水平线的倾角的差值小于预设阈值，相比于直接将网络设备的连线与地面水平线的倾角与某一阈值或者某一取值范围进行比较，需要针对每一个网络设备具体确定驻留小区选择时需要满足的条件，本申请实施例提供的技术方案降低了网络设备或运营商的处理开销，也减轻了终端设备的存储压力。
在又一种可能的实施方式中，如图12所示，上述步骤410包括如下几个步骤(41B～41D)：
步骤41B，终端设备根据第一网络设备的设备信息，确定第二参考位置。
第二参考位置是指地面上的某一位置，可选地，第二参考位置可以包括第一网络设备的地面覆盖中心点。可选地，为了方便确定第二参考位置，该第二参考位置可以包含在第一网络设备的设备信息中，从而终端设备可以在确定了第一网络设备后，可以直接确定第二参考位置；第二参考位置还可以是终端设备根据第一网络设备的设备信息计算得到的，例如，假设终端设备确定第二参考位置为地面覆盖中心点，则终端设备根据第一网络设备的设备信息获取到第一网络设备的覆盖范围后，可以根据该覆盖范围，计算出第二参考位置。
步骤41D，终端设备确定终端设备与第二参考位置之间的距离。
终端设备与第一网络设备之间的位置关系可以表现为终端设备与第二参考位置之间的距离。在终端设备确定第二参考位置后，即可根据自身的位置和第二参考位置，计算其与第二参考位置的距离。可选地，终端设备具备定位能力，可以获取自身的位置信息。如图13所示，终端设备位于第一网络设备的服务范围之内，其可以根据定位能力获知自身的位置，根据第一网络设备的设备信息确定第二参考位置，记为点C，然后再根据自身的位置和第二参考位置，确定其与第二参考位置之间的距离，记为d。
在一个示例中，基于上述步骤41B至41D，上述第一条件包括：终端设备与第二参考位置之间的距离小于第二阈值。可选地，第二阈值可以由网络设备预先配置，也可以由协议预先规定，还可以由终端设备结合实际情况确定，本申请实施例对此不作限定。可选地，第二阈值可以包括在第一网络设备的设备信息中。
在一个示例中，基于上述步骤41B至41D，上述第一网络设备的设备信息包括第一网络设备的覆盖位置信息，覆盖位置信息包括第二参考位置。在图10实施例中对NTN系统中网络设备的两种类型进行了介绍，此处图12实施例针对的是第二种类型的网络设备所提供的终端设备确定其与网络设备之间的位置关系的方式。如图11所示，假设第二参考位置为第一网络设备的地面覆盖中心点，记为点C，第一网络设备移动后，其服务范围不发生改变，则地面覆盖中心点也不发生改变。针对这一类型的网络设备，可以在第一网络设备的设备信息中添加覆盖位置信息，该覆盖位置信息用于指示第一网络设备对应的小区的波束方向(服务范围)随着第一网络设备的移动而改变，但是第一网络设备的服务范围保持不变。
综上所述，本申请实施例提供的技术方案，在终端设备与网络设备之间的位置关系表现为终端设备与地面参考位置之间的距离的情况下，通过终端设备根据网络设备的设备信息，确定地面参考位置，然后根据自身的位置和地面参考位置，确定其与地面参考位置之间的距离，提供了一种具体确定终端设备与网络设备之间的位置关系的方式。并且，本申请实施例针对NTN系统中网络设备移动时，波束方向发生改变，但是服务范围不变的情况，提供了一种具体设置驻留小区需要满足的条件的方式，从而为终端设备判断其处于靠近网络设备的中心位置，还是处于靠近网络设备的边缘位置，提供了一种具体的判断方式，便于终端设备对其与网络设备之间的位置关系进行判断。
需要说明的一点是，在上述方法实施例中，主要从网络设备和终端设备之间交互的角度，对本申请技术方案进行了介绍说明。上述有关终端设备执行的步骤，可以单独实现成为终端设备侧的小区选择方法；上述有关网络设备执行的步骤，可以单独实现成为网络设备侧的小区选择方法。
需要说明的另一点是，在上述方法实施例中，仅以NTN系统和地面蜂窝网系统中的典型情况为例进行举例说明，但并不构成对本申请实施例的限定，本领域技术人员在了解了本申请实施例提供的技术方案后，将容易想到其它的实施方式，如将针对NTN系统提出的实施方案应用于地面蜂窝网系统中，这些均应属于本申请的保护范围之内。
下述为本申请装置实施例，可以用于执行本申请方法实施例。对于本申请装置实施例中未披露的细节，请参照本申请方法实施例。
请参考图14，其示出了本申请一个实施例提供的小区选择装置的框图。该装置具有实现上述终端设备侧的方法示例的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文所述的终端设备，也可以设置在终端设备中。如图14所示，该装置1400可以包括：关系确定模块1410和小区选择模块1420。
关系确定模块1410，用于根据第一信息确定所述终端设备与第一网络设备之间的位置关系，所述第一信息包括所述第一网络设备的设备信息。
小区选择模块1420，用于在所述位置关系满足第一条件的情况下，选择所述第一网络设备对应的小区为驻留小区。
可选地，如图15所示，所述关系确定模块1410包括：第一位置确定子模块1412，用于根据所述第一 网络设备的设备信息，确定所述第一网络设备的位置；第一距离确定子模块1414，用于根据所述终端设备的位置和所述第一网络设备的位置，确定所述终端设备与所述第一网络设备之间的距离。
可选地，所述第一条件包括：所述终端设备与所述第一网络设备之间的距离属于第一取值范围。
可选地，如图15所示，所述关系确定模块1410包括：第二位置确定子模块141A，用于根据所述第一网络设备的设备信息，确定所述第一网络设备的位置；倾角确定子模块141C，用于根据所述终端设备的位置和所述第一网络设备的位置，确定所述终端设备与所述第一网络设备的连线与地面水平线的倾角。
可选地，所述第一条件包括：所述终端设备与所述第一网络设备的连线与地面水平线的倾角和第一倾角之间的差值小于第一阈值；其中，所述第一倾角是指所述第一网络设备与第一参考位置的连线与地面水平线的倾角。
可选地，所述第一参考位置包括所述第一网络设备的地面覆盖中心点。
可选地，所述第一网络设备的设备信息包括所述第一网络设备的角度波束信息，所述角度波束信息包括所述第一倾角。
可选地，所述第一网络设备的设备信息包括所述第一网络设备的星历信息，所述星历信息包括：所述第一网络设备的轨道信息、所述第一网络设备的参考位置信息、所述第一网络设备的参考时刻信息和所述第一网络设备的参考速度信息。
可选地，如图15所示，所述关系确定模块1410包括：第三位置确定子模块141B，用于根据所述第一网络设备的设备信息，确定所述第一网络设备的第二参考位置；第二距离确定子模块141D，用于确定所述终端设备与所述第二参考位置之间的距离。
可选地，所述第二参考位置包括所述第一网络设备的地面覆盖中心点。
可选地，所述第一条件包括：所述终端设备与所述第二参考位置之间的距离小于第二阈值。
可选地，所述第一网络设备的设备信息包括所述第一网络设备的覆盖位置信息，所述覆盖位置信息包括所述第一网络设备的第二参考位置。
可选地，如图15所示，所述装置1400还包括：信息获取模块1430，用于获取第一小区的小区信息，所述第一小区用于供所述终端设备选择所述驻留小区；设备确定模块1440，用于根据至少一个网络设备对应的小区的小区信息和所述第一小区的小区信息，从所述至少一个网络设备中确定所述第一网络设备。
可选地，所述小区信息包括：物理小区标识PCI和/或频点信息。
可选地，其特征在于，所述第一信息预配置在所述终端设备的全球用户识别卡USIM中；或者，所述第一信息承载在系统消息中发送给所述终端设备；或者，所述第一信息承载在无线资源控制RRC信令中发送给所述终端设备。
可选地，如图15所示，所述装置1400还包括：结果获取模块1450，用于获取所述第一网络设备对应的小区的信道质量测量结果；所述小区选择模块1420，还用于在所述位置关系满足所述第一条件，且所述信道质量测量结果满足第二条件的情况下，选择所述第一网络设备对应的小区为所述驻留小区。
可选地，所述第二条件包括：所述信道质量测量结果满足S准则。
综上所述，本申请实施例提供的技术方案，通过终端设备根据网络设备的设备信息，确定其与网络设备之间的位置关系，然后在位置关系满足一定条件的情况下，选择网络设备对应的小区为驻留小区，从而提供了一种基于终端设备与网络设备之间的位置关系选择驻留小区的方法。并且，本申请实施例中，由于终端设备与不同的网络设备之间的位置关系的差别较为明显，即便终端设备在确定其与网络设备之间的位置关系时存在测量和计算误差，也可以较为清楚地反映终端设备是距离网络设备服务范围的中心位置较近，还是距离网络设备服务范围的边缘位置较近，因此可以为终端设备选择驻留小区提供较为准确的参考，以提升驻留小区选择结果的准确性。另外，由于驻留小区是终端设备在小区选择或者重选目标小区时所选择的小区，本申请实施例提供的技术方案可以提升驻留小区选择结果的准确性，也就避免了终端设备因为驻留小区选择不够准确可能造成的无网络服务或者网络服务较差的状态，从而提升了终端设备的网络服务质量，并且提升了终端设备后续进行随机接入时的接入效率，或者提升了终端设备后续进行小区切换时的切换效率。
请参考图16，其示出了本申请一个实施例提供的小区选择装置的框图。该装置具有实现上述网络设备侧的方法示例的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该装置可以是上文所述的网络设备，也可以设置在网络设备中。如图16所示，该装置1600可以包括：信息发送模块1610。
信息发送模块1610，用于向终端设备发送第一信息，所述第一信息包括第一网络设备的设备信息，且所述第一信息用于供所述终端设备确定其与所述第一网络设备之间的位置关系，所述位置关系用于供所述终端设备选择驻留小区。
可选地，所述第一信息承载在系统消息中，或者，所述第一信息承载在无线资源控制RRC信令中。
综上所述，本申请实施例提供的技术方案，通过终端设备根据网络设备的设备信息，确定其与网络设 备之间的位置关系，然后在位置关系满足一定条件的情况下，选择网络设备对应的小区为驻留小区，从而提供了一种基于终端设备与网络设备之间的位置关系选择驻留小区的方法。并且，本申请实施例中，由于终端设备与不同的网络设备之间的位置关系的差别较为明显，即便终端设备在确定其与网络设备之间的位置关系时存在测量和计算误差，也可以较为清楚地反映终端设备是距离网络设备服务范围的中心位置较近，还是距离网络设备服务范围的边缘位置较近，因此可以为终端设备选择驻留小区提供较为准确的参考，以提升驻留小区选择结果的准确性。另外，由于驻留小区是终端设备在小区选择或者重选目标小区时所选择的小区，本申请实施例提供的技术方案可以提升驻留小区选择结果的准确性，也就避免了终端设备因为驻留小区选择不够准确可能造成的无网络服务或者网络服务较差的状态，从而提升了终端设备的网络服务质量，并且提升了终端设备后续进行随机接入时的接入效率，或者提升了终端设备后续进行小区切换时的切换效率。
需要说明的一点是，上述实施例提供的装置在实现其功能时，仅以上述各个功能模块的划分进行举例说明，实际应用中，可以根据实际需要而将上述功能分配由不同的功能模块完成，即将设备的内容结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。
关于上述实施例中的装置，其中各个模块执行操作的具体方式已经在有关该方法的实施例中进行了详细描述，此处将不做详细阐述说明。
请参考图17，其示出了本申请一个实施例提供的终端设备170的结构示意图，例如，该终端设备可以是上文所述终端设备，用于执行上述终端设备侧的小区选择方法。具体来讲：该终端设备170可以包括：处理器171、接收器172、发射器173、存储器174和总线175。
处理器171包括一个或者一个以上处理核心，处理器171通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器172和发射器173可以实现为一个收发器176，该收发器176可以是一块通信芯片。
存储器174通过总线175与处理器171相连。
存储器174可用于存储计算机程序，处理器171用于执行该计算机程序，以实现上述方法实施例中的终端执行的各个步骤。
此外，存储器174可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：RAM(Random-Access Memory，随机存储器)和ROM(Read-Only Memory，只读存储器)、EPROM(Erasable Programmable Read-Only Memory，可擦写可编程只读存储器)、EEPROM(Electrically Erasable Programmable Read-Only Memory，电可擦写可编程只读存储器)、闪存或其他固态存储其技术，CD-ROM(Compact Disc Read-Only Memory，只读光盘)、DVD(Digital Video Disc，高密度数字视频光盘)或其他光学存储、磁带盒、磁带、磁盘存储或其他磁性存储设备。其中：
所述处理器171，用于根据第一信息确定所述终端设备与第一网络设备之间的位置关系，所述第一信息包括所述第一网络设备的设备信息。
所述处理器171，用于在所述位置关系满足第一条件的情况下，选择所述第一网络设备对应的小区为驻留小区。
可选地，所述处理器171用于：根据所述第一网络设备的设备信息，确定所述第一网络设备的位置；根据所述终端设备的位置和所述第一网络设备的位置，确定所述终端设备与所述第一网络设备之间的距离。
可选地，所述第一条件包括：所述终端设备与所述第一网络设备之间的距离属于第一取值范围。
可选地，所述处理器171用于：根据所述第一网络设备的设备信息，确定所述第一网络设备的位置；根据所述终端设备的位置和所述第一网络设备的位置，确定所述终端设备与所述第一网络设备的连线与地面水平线的倾角。
可选地，所述第一条件包括：所述终端设备与所述第一网络设备的连线与地面水平线的倾角和第一倾角之间的差值小于第一阈值；其中，所述第一倾角是指所述第一网络设备与第一参考位置的连线与地面水平线的倾角。
可选地，所述第一参考位置包括所述第一网络设备的地面覆盖中心点。
可选地，所述第一网络设备的设备信息包括所述第一网络设备的角度波束信息，所述角度波束信息包括所述第一倾角。
可选地，所述第一网络设备的设备信息包括所述第一网络设备的星历信息，所述星历信息包括：所述第一网络设备的轨道信息、所述第一网络设备的参考位置信息、所述第一网络设备的参考时刻信息和所述第一网络设备的参考速度信息。
可选地，所述处理器171用于：根据所述第一网络设备的设备信息，确定所述第一网络设备的第二参 考位置；确定所述终端设备与所述第二参考位置之间的距离。
可选地，所述第二参考位置包括所述第一网络设备的地面覆盖中心点。
可选地，所述第一条件包括：所述终端设备与所述第二参考位置之间的距离小于第二阈值。
可选地，所述第一网络设备的设备信息包括所述第一网络设备的覆盖位置信息，所述覆盖位置信息包括所述第一网络设备的第二参考位置。
可选地，所述收发器176，用于获取第一小区的小区信息，所述第一小区用于供所述终端设备选择所述驻留小区；所述处理器171，还用于根据至少一个网络设备对应的小区的小区信息和所述第一小区的小区信息，从所述至少一个网络设备中确定所述第一网络设备。
可选地，所述小区信息包括：物理小区标识PCI和/或频点信息。
可选地，其特征在于，所述第一信息预配置在所述终端设备的全球用户识别卡USIM中；或者，所述第一信息承载在系统消息中发送给所述终端设备；或者，所述第一信息承载在无线资源控制RRC信令中发送给所述终端设备。
可选地，所述收发器176，还用于获取所述第一网络设备对应的小区的信道质量测量结果；所述处理器171，还用于在所述位置关系满足所述第一条件，且所述信道质量测量结果满足第二条件的情况下，选择所述第一网络设备对应的小区为所述驻留小区。
可选地，所述第二条件包括：所述信道质量测量结果满足S准则。
请参考图18，其示出了本申请一个实施例提供的网络设备180的结构示意图，例如，该网络设备可以是上文所述网络设备，用于执行上述网络设备侧的小区选择方法。具体来讲：该网络设备180可以包括：处理器181、接收器182、发射器183、存储器184和总线185。
处理器181包括一个或者一个以上处理核心，处理器181通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器182和发射器183可以实现为一个收发器186，该收发器186可以是一块通信芯片。
存储器184通过总线185与处理器181相连。
存储器184可用于存储计算机程序，处理器181用于执行该计算机程序，以实现上述方法实施例中的网络设备执行的各个步骤。
此外，存储器184可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：RAM(Random-Access Memory，随机存储器)和ROM(Read-Only Memory，只读存储器)、EPROM(Erasable Programmable Read-Only Memory，可擦写可编程只读存储器)、EEPROM(Electrically Erasable Programmable Read-Only Memory，电可擦写可编程只读存储器)、闪存或其他固态存储其技术，CD-ROM(Compact Disc Read-Only Memory，只读光盘)、DVD(Digital Video Disc，高密度数字视频光盘)或其他光学存储、磁带盒、磁带、磁盘存储或其他磁性存储设备。其中：
所述收发器186，用于向终端设备发送第一信息，所述第一信息包括第一网络设备的设备信息，且所述第一信息用于供所述终端设备确定其与所述第一网络设备之间的位置关系，所述位置关系用于供所述终端设备选择驻留小区。
可选地，所述第一信息承载在系统消息中，或者，所述第一信息承载在无线资源控制RRC信令中。
本申请实施例还提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被终端设备的处理器执行，以实现上述终端设备侧的小区选择方法。
本申请实施例还提供了一种计算机可读存储介质，所述存储介质中存储有计算机程序，所述计算机程序用于被网络设备的处理器执行，以实现上述网络设备侧的小区选择方法。
本申请实施例还提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在终端设备上运行时，用于实现如上述终端设备侧的小区选择方法。
本申请实施例还提供了一种芯片，所述芯片包括可编程逻辑电路和/或程序指令，当所述芯片在网络设备上运行时，用于实现如上述网络设备侧的小区选择方法。
本申请还提供了一种计算机程序产品，当计算机程序产品在终端设备侧计算机上运行时，使得计算机执行上述终端设备侧的小区选择方法。
本申请还提供了一种计算机程序产品，当计算机程序产品在网络设备侧计算机上运行时，使得计算机执行上述网络设备侧的小区选择方法。
本领域技术人员应该可以意识到，在上述一个或多个示例中，本申请实施例所描述的功能可以用硬件、软件、固件或它们的任意组合来实现。当使用软件实现时，可以将这些功能存储在计算机可读介质中或者作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介 质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是通用或专用计算机能够存取的任何可用介质。
以上所述仅为本申请的示例性实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (42)

  1. 一种小区选择方法，其特征在于，应用于终端设备中，所述方法包括：
    根据第一信息确定所述终端设备与第一网络设备之间的位置关系，所述第一信息包括所述第一网络设备的设备信息；
    在所述位置关系满足第一条件的情况下，选择所述第一网络设备对应的小区为驻留小区。
  2. 根据权利要求1所述的方法，其特征在于，所述根据第一信息确定所述终端设备与第一网络设备之间的位置关系，包括：
    根据所述第一网络设备的设备信息，确定所述第一网络设备的位置；
    根据所述终端设备的位置和所述第一网络设备的位置，确定所述终端设备与所述第一网络设备之间的距离。
  3. 根据权利要求2所述的方法，其特征在于，所述第一条件包括：所述终端设备与所述第一网络设备之间的距离属于第一取值范围。
  4. 根据权利要求1所述的方法，其特征在于，所述根据第一信息确定所述终端设备与第一网络设备之间的位置关系，包括：
    根据所述第一网络设备的设备信息，确定所述第一网络设备的位置；
    根据所述终端设备的位置和所述第一网络设备的位置，确定所述终端设备与所述第一网络设备的连线与地面水平线的倾角。
  5. 根据权利要求4所述的方法，其特征在于，所述第一条件包括：所述终端设备与所述第一网络设备的连线与地面水平线的倾角和第一倾角之间的差值小于第一阈值；
    其中，所述第一倾角是指所述第一网络设备与第一参考位置的连线与地面水平线的倾角。
  6. 根据权利要求5所述的方法，其特征在于，所述第一参考位置包括所述第一网络设备的地面覆盖中心点。
  7. 根据权利要求5所述的方法，其特征在于，所述第一网络设备的设备信息包括所述第一网络设备的角度波束信息，所述角度波束信息包括所述第一倾角。
  8. 根据权利要求2或4所述的方法，其特征在于，所述第一网络设备的设备信息包括所述第一网络设备的星历信息，所述星历信息包括：所述第一网络设备的轨道信息、所述第一网络设备的参考位置信息、所述第一网络设备的参考时刻信息和所述第一网络设备的参考速度信息。
  9. 根据权利要求1所述的方法，其特征在于，所述根据第一信息确定所述终端设备与第一网络设备之间的位置关系，包括：
    根据所述第一网络设备的设备信息，确定所述第一网络设备的第二参考位置；
    确定所述终端设备与所述第二参考位置之间的距离。
  10. 根据权利要求9所述的方法，其特征在于，所述第二参考位置包括所述第一网络设备的地面覆盖中心点。
  11. 根据权利要求9所述的方法，其特征在于，所述第一条件包括：所述终端设备与所述第二参考位置之间的距离小于第二阈值。
  12. 根据权利要求9所述的方法，其特征在于，所述第一网络设备的设备信息包括所述第一网络设备的覆盖位置信息，所述覆盖位置信息包括所述第一网络设备的第二参考位置。
  13. 根据权利要求1至12任一项所述的方法，其特征在于，所述方法还包括：
    获取第一小区的小区信息，所述第一小区用于供所述终端设备选择所述驻留小区；
    根据至少一个网络设备对应的小区的小区信息和所述第一小区的小区信息，从所述至少一个网络设备中确定所述第一网络设备。
  14. 根据权利要求13所述的方法，其特征在于，所述小区信息包括：物理小区标识PCI和/或频点信息。
  15. 根据权利要求1至14任一项所述的方法，其特征在于，
    所述第一信息预配置在所述终端设备的全球用户识别卡USIM中；
    或者，所述第一信息承载在系统消息中发送给所述终端设备；
    或者，所述第一信息承载在无线资源控制RRC信令中发送给所述终端设备。
  16. 根据权利要求1至15任一项所述的方法，其特征在于，所述方法还包括：
    获取所述第一网络设备对应的小区的信道质量测量结果；
    在所述位置关系满足所述第一条件，且所述信道质量测量结果满足第二条件的情况下，选择所述第一 网络设备对应的小区为所述驻留小区。
  17. 根据权利要求16所述的方法，其特征在于，所述第二条件包括：所述信道质量测量结果满足S准则。
  18. 一种小区选择方法，其特征在于，应用于网络设备中，所述方法包括：
    向终端设备发送第一信息，所述第一信息包括第一网络设备的设备信息，且所述第一信息用于供所述终端设备确定其与所述第一网络设备之间的位置关系，所述位置关系用于供所述终端设备选择驻留小区。
  19. 根据权利要求18所述的方法，其特征在于，所述第一信息承载在系统消息中，或者，所述第一信息承载在无线资源控制RRC信令中。
  20. 一种小区选择装置，其特征在于，应用于终端设备中，所述装置包括：
    关系确定模块，用于根据第一信息确定所述终端设备与第一网络设备之间的位置关系，所述第一信息包括所述第一网络设备的设备信息；
    小区选择模块，用于在所述位置关系满足第一条件的情况下，选择所述第一网络设备对应的小区为驻留小区。
  21. 根据权利要求20所述的装置，其特征在于，所述关系确定模块包括：
    第一位置确定子模块，用于根据所述第一网络设备的设备信息，确定所述第一网络设备的位置；
    第一距离确定子模块，用于根据所述终端设备的位置和所述第一网络设备的位置，确定所述终端设备与所述第一网络设备之间的距离。
  22. 根据权利要求21所述的装置，其特征在于，所述第一条件包括：所述终端设备与所述第一网络设备之间的距离属于第一取值范围。
  23. 根据权利要求20所述的装置，其特征在于，所述关系确定模块包括：
    第二位置确定子模块，用于根据所述第一网络设备的设备信息，确定所述第一网络设备的位置；
    倾角确定子模块，用于根据所述终端设备的位置和所述第一网络设备的位置，确定所述终端设备与所述第一网络设备的连线与地面水平线的倾角。
  24. 根据权利要求23所述的装置，其特征在于，所述第一条件包括：所述终端设备与所述第一网络设备的连线与地面水平线的倾角和第一倾角之间的差值小于第一阈值；
    其中，所述第一倾角是指所述第一网络设备与第一参考位置的连线与地面水平线的倾角。
  25. 根据权利要求24所述的装置，其特征在于，所述第一参考位置包括所述第一网络设备的地面覆盖中心点。
  26. 根据权利要求24所述的装置，其特征在于，所述第一网络设备的设备信息包括所述第一网络设备的角度波束信息，所述角度波束信息包括所述第一倾角。
  27. 根据权利要求21或23所述的装置，其特征在于，所述第一网络设备的设备信息包括所述第一网络设备的星历信息，所述星历信息包括：所述第一网络设备的轨道信息、所述第一网络设备的参考位置信息、所述第一网络设备的参考时刻信息和所述第一网络设备的参考速度信息。
  28. 根据权利要求20所述的装置，其特征在于，所述关系确定模块包括：
    第三位置确定子模块，用于根据所述第一网络设备的设备信息，确定所述第一网络设备的第二参考位置；
    第二距离确定子模块，用于确定所述终端设备与所述第二参考位置之间的距离。
  29. 根据权利要求28所述的装置，其特征在于，所述第二参考位置包括所述第一网络设备的地面覆盖中心点。
  30. 根据权利要求28所述的装置，其特征在于，所述第一条件包括：所述终端设备与所述第二参考位置之间的距离小于第二阈值。
  31. 根据权利要求28所述的装置，其特征在于，所述第一网络设备的设备信息包括所述第一网络设备的覆盖位置信息，所述覆盖位置信息包括所述第一网络设备的第二参考位置。
  32. 根据权利要求20至31任一项所述的装置，其特征在于，所述装置还包括：
    信息获取模块，用于获取第一小区的小区信息，所述第一小区用于供所述终端设备选择所述驻留小区；
    设备确定模块，用于根据至少一个网络设备对应的小区的小区信息和所述第一小区的小区信息，从所述至少一个网络设备中确定所述第一网络设备。
  33. 根据权利要求32所述的装置，其特征在于，所述小区信息包括：物理小区标识PCI和/或频点信息。
  34. 根据权利要求20至33任一项所述的装置，其特征在于，
    所述第一信息预配置在所述终端设备的全球用户识别卡USIM中；
    或者，所述第一信息承载在系统消息中发送给所述终端设备；
    或者，所述第一信息承载在无线资源控制RRC信令中发送给所述终端设备。
  35. 根据权利要求20至34任一项所述的装置，其特征在于，所述装置还包括：
    结果获取模块，用于获取所述第一网络设备对应的小区的信道质量测量结果；
    所述小区选择模块，还用于在所述位置关系满足所述第一条件，且所述信道质量测量结果满足第二条件的情况下，选择所述第一网络设备对应的小区为所述驻留小区。
  36. 根据权利要求35所述的装置，其特征在于，所述第二条件包括：所述信道质量测量结果满足S准则。
  37. 一种小区选择装置，其特征在于，应用于网络设备中，所述装置包括：
    信息发送模块，用于向终端设备发送第一信息，所述第一信息包括第一网络设备的设备信息，且所述第一信息用于供所述终端设备确定其与所述第一网络设备之间的位置关系，所述位置关系用于供所述终端设备选择驻留小区。
  38. 根据权利要求37所述的装置，其特征在于，所述第一信息承载在系统消息中，或者，所述第一信息承载在无线资源控制RRC信令中。
  39. 一种终端设备，其特征在于，所述终端设备包括处理器和与所述处理器相连的收发器；其中：
    所述处理器，用于根据第一信息确定所述终端设备与第一网络设备之间的位置关系，所述第一信息包括所述第一网络设备的设备信息；
    所述处理器，还用于在所述位置关系满足第一条件的情况下，选择所述第一网络设备对应的小区为驻留小区。
  40. 一种网络设备，其特征在于，所述网络设备包括处理器和与所述处理器相连的收发器；其中：
    所述收发器，用于向终端设备发送第一信息，所述第一信息包括第一网络设备的设备信息，且所述第一信息用于供所述终端设备确定其与所述第一网络设备之间的位置关系，所述位置关系用于供所述终端设备选择驻留小区。
  41. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序，所述计算机程序用于被终端设备的处理器执行，以实现如权利要求1至17任一项所述的小区选择方法。
  42. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序，所述计算机程序用于被网络设备的处理器执行，以实现如权利要求18或19所述的小区选择方法。
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