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WO2023011227A1 - Procédé et appareil de commutation de réseau non terrestre, support de stockage et dispositif électronique - Google Patents

Procédé et appareil de commutation de réseau non terrestre, support de stockage et dispositif électronique Download PDF

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Publication number
WO2023011227A1
WO2023011227A1 PCT/CN2022/107544 CN2022107544W WO2023011227A1 WO 2023011227 A1 WO2023011227 A1 WO 2023011227A1 CN 2022107544 W CN2022107544 W CN 2022107544W WO 2023011227 A1 WO2023011227 A1 WO 2023011227A1
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WIPO (PCT)
Prior art keywords
terminal
information
cell
base station
network
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PCT/CN2022/107544
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English (en)
Chinese (zh)
Inventor
刘家祥
蒋峥
佘小明
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/328—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by altitude
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data

Definitions

  • the present disclosure relates to the technical field of communications, and in particular to a non-terrestrial network switching method and device, storage medium, and electronic equipment.
  • 5G introduces conditional handover technology in the research of terrestrial cellular network mobility enhancement to improve the robustness of handover.
  • the network configures handover execution conditions and multiple candidate cells for the user terminal equipment in advance, and the user selects one of them for handover.
  • NTN Non-Terrestrial Network
  • one or several satellite gateways provide continuous services for mobile terminals on the ground.
  • mobile terminals are required to perform network switching without interruption to ensure the continuity of service status.
  • the purpose of the present disclosure is to provide a non-terrestrial network switching method and device, storage medium and electronic equipment.
  • a non-terrestrial network handover method including: the terminal receives cell coverage information from the source base station sent by the network device, the cell coverage information includes cell center location information; the terminal judges whether the distance from the cell center location is exceeds the first threshold value; when the distance between the terminal's position and the center of the cell exceeds the first threshold value, the terminal triggers the measurement report, and sends the measurement information to the source base station through the network device; the terminal receives the information from the source base station through the network device
  • the handover information sent by the source base station is determined according to the measurement information, and the handover information includes candidate cell configuration information and a second threshold value; and when the terminal judges that the distance from the center of the cell reaches the second threshold value, the terminal triggers The network switches to the candidate cell.
  • a non-terrestrial network handover method including: the source base station sends cell coverage information to the terminal through the network device, including cell center location information; the source base station receives the measurement information sent by the terminal through the network device, wherein The measurement information is the measurement result triggered when the position information of the terminal and the center of the cell exceeds the first threshold value; and the source base station obtains the handover information according to the measurement information, and sends the handover information to the terminal through the network device, and the handover information includes candidate cell configuration information and The second threshold value, the handover information is used to trigger the terminal to perform network handover to the candidate cell when the relative distance between the terminal location and the cell center location information reaches the second threshold value.
  • a non-terrestrial network handover method including: a source base station sends cell coverage information to a terminal through a network device, and the cell coverage information includes cell center location information; the terminal receives the information from the source base station through the network device Cell coverage information; the terminal judges whether the distance from the center of the cell exceeds the first threshold; when the distance between the terminal and the center of the cell exceeds the first threshold, the terminal triggers a measurement report, and sends the measurement information through the network device Send to the source base station; the source base station receives the measurement information; the source base station obtains the handover information according to the measurement information, and sends the handover information to the terminal through the network equipment, and the handover information includes candidate cell configuration information and the second threshold value; the terminal receives the handover information sent by the network equipment Handover information from the source base station; and when the terminal judges that the distance from the center of the cell reaches a second threshold, the terminal triggers the network to switch to the candidate cell.
  • a non-terrestrial network switching device including: a first receiving module, configured for a terminal to receive cell coverage information from a source base station sent by a network device, where the cell coverage information includes cell center location information; A judging module, used for the terminal to judge whether the distance from the center of the cell exceeds the first threshold; a trigger measurement reporting module, used for triggering the measurement when the distance between the terminal's location and the center of the cell exceeds the first threshold report, and send the measurement information to the source base station through the network equipment; the second receiving module is used for the terminal to receive the handover information from the source base station sent by the network equipment, the handover information is determined according to the measurement information, and the handover information includes candidate cells configuration information and a second threshold; and a second judging module, configured to trigger the terminal to switch the network to the candidate cell when the distance between the terminal and the center of the cell reaches the second threshold.
  • a non-terrestrial network switching device including: a first sending module, used for the source base station to send cell coverage information, including cell center location information, to the terminal through network equipment; a receiving module for the source The base station receives the measurement information sent by the terminal through the network device, wherein the measurement information is the measurement result triggered when the location information of the terminal and the cell center exceeds the first threshold; the determination module is used for the source base station to determine handover information according to the measurement information; and the second sending A module, configured to send handover information to the terminal through the network device, where the handover information includes candidate cell configuration information and a second threshold.
  • an electronic device including: a processor; and a memory for storing executable instructions of the processor; a transceiver for communicating with other devices; wherein the processor It is configured to execute the above-mentioned method of the present application by executing the executable instructions.
  • a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the above-mentioned method of the present application is implemented.
  • a computer program product including a computer program, wherein, when the computer program is executed by a processor, the above-mentioned steps of the non-terrestrial network switching method are implemented.
  • FIG. 1 shows a schematic diagram of a typical network architecture of a non-terrestrial communication system in an embodiment of the present disclosure
  • FIG. 2 shows a schematic flowchart of a non-terrestrial network handover method in an embodiment of the present disclosure
  • FIG. 3 shows a schematic diagram of a scenario of a non-terrestrial network handover method in an embodiment of the present disclosure
  • FIG. 4 shows a schematic diagram of another non-terrestrial network handover method in an embodiment of the present disclosure
  • FIG. 5 shows a schematic flowchart of another non-terrestrial network handover method in an embodiment of the present disclosure
  • FIG. 6 shows a schematic flowchart of another non-terrestrial network handover method in an embodiment of the present disclosure
  • FIG. 7 shows a schematic flowchart of another non-terrestrial network handover method in an embodiment of the present disclosure
  • FIG. 8 shows a schematic diagram of a signaling interaction process of a non-terrestrial network handover method in an embodiment of the present disclosure
  • FIG. 9 shows a structural block diagram of a non-terrestrial network switching device in an embodiment of the present disclosure.
  • Fig. 10 shows a structural block diagram of another non-terrestrial network switching device in an embodiment of the present disclosure.
  • Fig. 11 shows a structural block diagram of a computer device in a non-terrestrial network switching method in an embodiment of the present disclosure.
  • Example embodiments will now be described more fully with reference to the accompanying drawings.
  • Example embodiments may, however, be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of example embodiments to those skilled in the art.
  • the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as “first” and “second” may explicitly or implicitly include one or more of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise specifically defined.
  • the solution provided by the embodiment of the present application can be used in the 5G system, and can also be applied in the long term evolution (long term evolution, LTE), specifically described through the following embodiments:
  • Fig. 1 is a schematic diagram of a typical network architecture of a non-terrestrial (Non-Terrestrial Networks, NTN) communication system provided by an exemplary embodiment of the present application.
  • the system includes: several terminals 120 , a ground base station 130 , several network devices 140 , a gateway (Gateway, GW) 150 and a data network 160 .
  • GW Gateway
  • the terminal 120 can be a mobile phone, a game console, a tablet computer, an e-book reader, smart glasses, an MP4 (Moving Picture Experts Group Audio Layer IV, moving picture experts compression standard audio layer 4) player, smart home equipment, AR (Augmented Reality, augmented reality) equipment, VR (Virtual Reality, virtual reality) equipment, navigation equipment, or mobile terminals such as terminals in other communication systems in the future, or terminal 120 can also be a personal computer (Personal Computer, PC), such as a laptop laptops, desktops, and more.
  • PC Personal Computer
  • the terminal 120 is connected to the network device 140 through a communication network.
  • the terminal 120 may communicate with the network device 140 through an air interface access network.
  • the network device 140 can communicate with the terrestrial base station 130 or the data network 160 through the next generation network interface connection service gateway 150 .
  • wireless links also exist between network devices 140 to complete signaling interaction and data transmission between network devices 140 .
  • the gateway 150 may be used to forward signaling and service data between the network device 140 and the ground base station 130 and the data network 160 .
  • the gateway 150 can be a ground device installed on the ground (including on a ship or an aircraft) for satellite communication, and consists of a high-gain antenna system capable of tracking satellites, a microwave high-power transmitting system, a low-noise receiving system, and a power supply. system etc.
  • different network devices 140 may be connected to the same base station 130 on the ground through gateways.
  • the network device 140 may also be used to store network switching information.
  • the network device 140 may be a satellite (such as an artificial earth satellite) that provides wireless access services for the terminal 120, and the terminal 120 transparently transmits the wireless resources of the ground base station (not shown) through the satellite. , providing reliable wireless transmission protocols and data encryption protocols, etc. Satellites can be geostationary orbit (geostationary orbit, GEO) satellites, non-stationary orbit medium earth orbit (MEO) satellites and low earth orbit (low earth orbit, LEO) satellites, and high altitude platform (high altitude platform) station,HAPS). In some optional embodiments, the network device 140 may also be a high-altitude aircraft (unmanned aerial vehicle system), a ship system or other non-terrestrial base stations that can serve as wireless communications, such as non-terrestrial evolved base stations and 5G base stations.
  • GEO geostationary orbit
  • MEO non-stationary orbit medium earth orbit
  • LEO low earth orbit
  • HAS high altitude platform station
  • the network device 140 may also be a high-altitude aircraft (unmanned aerial vehicle system),
  • the terminal device 120 can communicate with the ground base station 130 through the network device 140, wherein the network device 140 can implement transparency or regenerate payloads.
  • the beams generated by the network equipment usually generate multiple beams in a given service area within its coverage area, and the radiation of the beams is usually elliptical.
  • the multiple network devices 140 included in the above network device 140 may belong to the same type of network device, or the above multiple network devices 140 may also belong to different types of network devices.
  • the number of the foregoing terminals 120 and network devices 140 may be more or less. For example, there may be only one terminal and network device 140, or there may be tens or hundreds of terminals, or more.
  • the embodiment of the present application does not limit the number and device types of the terminals 120 and network devices 140 .
  • this scenario may further include a management device (not shown in FIG. 1 ), and the management device is connected to the data network 180 through a communication network.
  • the communication network is a wired network or a wireless network.
  • the aforementioned wireless network or wired network used for the data network 180 uses standard communication technologies and/or protocols.
  • the network is usually the Internet, but can be any network, including but not limited to Local Area Network (LAN), Metropolitan Area Network (MAN), Wide Area Network (WAN), mobile, wired or wireless network, private network, or any combination of virtual private networks).
  • data exchanged over a network is represented using technologies and/or formats including Hyper Text Mark-up Language (HTML), Extensible Markup Language (XML), and the like.
  • HTML Hyper Text Mark-up Language
  • XML Extensible Markup Language
  • you can also use such as Secure Socket Layer (Secure Socket Layer, SSL), Transport Layer Security (Transport Layer Security, TLS), Virtual Private Network (Virtual Private Network, VPN), Internet Protocol Security (Internet Protocol Security, IPsec), etc.
  • SSL Secure Socket Layer
  • TLS Transport Layer Security
  • VPN Virtual Private Network
  • Internet Protocol Security Internet Protocol Security
  • IPsec Internet Protocol Security
  • Fig. 2 shows a flowchart of a non-terrestrial network handover method in an embodiment of the present disclosure.
  • the method provided by the embodiments of the present disclosure may be executed by any electronic device capable of computing and processing, for example, various types of terminals 120 or specific devices in the terminal 120 as shown in FIG. 1 .
  • the terminal 120 is used as an execution subject for illustration.
  • the non-terrestrial network handover method 200 may include the following steps:
  • Step S210 the terminal receives the cell coverage information sent by the source base station through the network device, the cell coverage information includes cell center location information.
  • the terminal receives the cell center location information broadcast by the source base station through the network device.
  • the above information is sent by broadcasting a system information block (System Information Block, SIB) message or defining a new SIB message.
  • SIB System Information Block
  • the cell center location information may be expressed in the form of latitude and longitude coordinates.
  • the cell coverage information may further include cell radius information, and the cell radius information may assist the terminal in identifying the edge position of the cell. Furthermore, in some embodiments, the terminal may determine the first threshold according to the cell radius information.
  • each ground base station may establish a communication connection with one or more network devices, and a cell is an area covered by each network device.
  • a cell covered by each network device has a corresponding identifier, and each identifier can be used to identify a unique cell.
  • Step S220 the terminal judges whether the distance from the center of the cell exceeds a first threshold.
  • the first threshold may be determined by the terminal according to the radius information of the cell center, and may also be used as one of configuration information of the source base station.
  • the present application does not limit the setting of the first threshold.
  • the first threshold value is determined according to the cell radius information, so as to automatically trigger the measurement report of the terminal at the edge of the cell, especially when the difference in signal quality between the center of the cell and the edge of the cell is not obvious, triggering based on the geographic location Measurement reporting improves the accuracy and real-time performance of network switching.
  • Step S230 when the distance between the location of the terminal and the center of the cell exceeds a first threshold, the terminal triggers a measurement report, and sends the measurement information to the source base station through the network device.
  • the generated measurement information may also include, but not limited to: the ID of the neighboring cell, and the measured values of Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ) of the neighboring cell. In some other embodiments, it may also include: the identification ID of the current cell, and the RSRP and RSRQ of the current cell.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • the non-terrestrial network handover process ends.
  • Step S240 the terminal receives handover information from the source base station through the network equipment, the handover information sent by the source base station is determined according to the measurement information, and the handover information includes candidate cell configuration information and a second threshold.
  • the second threshold may be the maximum allowable Euclidean distance between the location of the terminal and the cell center of the source base station, and the Euclidean distance satisfies the constraint condition that it is less than or equal to the cell radius.
  • Step S250 when the terminal judges that the distance from the center of the cell reaches the second threshold, the terminal triggers the network to switch to the candidate cell.
  • condition for triggering the network handover execution process may further include: the terminal continuously performs signal measurement on the candidate cell, and triggers the network handover execution process when the signal quality meets the network handover condition.
  • the network handover execution process may include that the terminal sends synchronization and random access messages to the candidate base station through the first network device and the second network device; and then sends a handover confirmation message to the candidate base station to perform network handover to candidate districts.
  • the terminal automatically triggers network switching through location information, especially when the signal quality difference between the center of the cell and the edge of the cell is small and the network switching cannot be performed through the measurement information of the channel, it can significantly Improve the success rate and accuracy of network switching, further enhance the continuity of network equipment services, and improve the quality of network services.
  • the present application guides the terminal to report the measurement of the network handover based on the relationship between the relative position information and the first threshold value, which can assist the source base station to select a better target network and further improve the network service quality.
  • the network device is a non-terrestrial base station with integrated base station functions and/or a non-terrestrial network device with a transparent transmission function.
  • non-terrestrial base stations with integrated base station functions can be satellites, high-altitude aircraft (unmanned aerial systems), ship systems, or other non-terrestrial base stations that can serve as wireless communications, such as non-terrestrial evolved base stations and 5G base stations. Also for example, it may be a Beidou satellite with a transparent transmission function. Another example is some non-terrestrial network devices that do not have base station functions and only support transparent transmission functions.
  • the method in the embodiments of the present disclosure applies to non-terrestrial base stations/non-terrestrial network equipment scenarios.
  • the network equipment of the present disclosure only performs transparent transmission, which can realize low-cost and low-risk switching of non-terrestrial networks, and can Effectively improve network reliability and facilitate promotion and implementation.
  • Fig. 3 shows a schematic diagram of a scenario of a non-terrestrial network handover method in an embodiment of the present disclosure.
  • the terminal 310 performs non-terrestrial network handover within the network coverage of the same network device 330, and the cell corresponding to each network device has a corresponding identifier, and each identifier can be used to uniquely identify the base station covered area.
  • the terminal 310 realizes the network handover from the source cell to the candidate cell through scheduling by the same network device 330 .
  • the scheduling by the terminal 310 through the same network device 330 may include: the terminal 310 receives the source cell radius information r 1 and the cell center location broadcast by the source base station 320 through the network device 330, for example, as shown in FIG. 3 The indicated longitude and latitude position (x 1 , y 1 ), according to which the terminal 310 determines the first threshold value th1 according to the cell edge position r 1 .
  • the terminal When the relative distance between the terminal position and the source base station exceeds th1, the terminal sends measurement information on its own position and neighboring cells to the source base station 320 through the network device 310, and the source base station 320 determines a candidate cell and uses the network device 330 to send the measurement information of the candidate cell to the source base station 320.
  • the information is sent to the terminal 310, including the second threshold th2.
  • the terminal 310 judges that the relative distance between itself and the center of the cell of the source base station is greater than the second gate limit th2, the terminal 310 triggers a network handover to the candidate cell.
  • triggering the network handover execution process also includes: when the terminal 310 judges that the relative distance from the center of the source cell is equal to the second gate limit th2.
  • the source base station realizes the seamless network handover of the terminal in the edge area of the cell covered by the same network equipment by scheduling the cells covered by the network equipment, so as to improve the success rate and accuracy of network handover, thereby improving the continuity of network services and improve network service quality.
  • the network device is a non-terrestrial base station with integrated base station functions and/or a non-terrestrial network device with a transparent transmission function.
  • non-terrestrial base stations with integrated base station functions can be satellites, high-altitude aircraft (unmanned aerial systems), ship systems, or other non-terrestrial base stations that can serve as wireless communications, such as non-terrestrial evolved base stations and 5G base stations. Also for example, it may be a Beidou satellite with a transparent transmission function. Another example is some non-terrestrial network devices that do not have base station functions and only support transparent transmission functions.
  • the handover of different cells in the same network device is performed in the scenario of using non-terrestrial base stations/non-terrestrial network devices in the prior art.
  • the network device of the present disclosure only performs transparent transmission, which can achieve low cost , Switching non-terrestrial networks with low risk can effectively improve network reliability and facilitate promotion and implementation.
  • Fig. 4 shows a schematic diagram of another non-terrestrial network handover method in an embodiment of the present disclosure.
  • the terminal 410 performs network switching between the source cell corresponding to the source base station 420 and the candidate cell corresponding to the candidate base station 421 through the source network device 440 and the candidate network device 441 .
  • the cell corresponding to each network device has a corresponding identifier, and each identifier can be used to uniquely identify the cell corresponding to the network device.
  • the terminal 410 implements network handover between the source cell and the candidate cell through the scheduling of the source network device 430 and the candidate network device 431 .
  • the scheduling of the source network device 431 and the candidate network device 431 may include: the terminal 410 receives the cell radius information r 2 and the cell center position broadcast by the source base station 420 through the source network device 430, such as in FIG. 4 The longitude and latitude position (x 2 , y 2 ), according to which the terminal 410 determines the first threshold th3 according to the cell edge position r 2 .
  • the terminal 410 sends the measurement information of the terminal location and adjacent cells to the source base station 420 through the source network device 430, and the source base station 420 determines a candidate cell and sends the The information of the candidate base station 421 corresponding to the candidate cell is sent to the terminal 410, including the second threshold th4.
  • the terminal 410 judges that the relative distance between itself and the center of the cell of the source base station is greater than the second gate limit th4, the terminal 410 triggers a network handover to the candidate cell.
  • triggering the network handover execution process also includes: when the terminal 410 judges that the relative distance from the center of the cell of the source base station is equal to the second gate limit th4.
  • the scheduling of the source network device 430 and the candidate network device 431 may also include: the source base station 420 sends network switching request information to the candidate base station 421 through the source network device 430 and the candidate network device 431; the candidate base station 421 Confirm or reject the network switching request of the terminal 410 to the source base station 420 through the candidate network device 431 and the source network device 430 .
  • the network switching request may include the information of the candidate cell corresponding to the candidate base station 421, and this application does not limit the information of the network switching request.
  • the source base station realizes the seamless network handover of the terminal in the edge area of the cell covered by the two network equipments by scheduling network equipment, so as to improve the success rate and accuracy of network handover, thereby improving the continuity of network services. Improve network service quality.
  • the network device is a non-terrestrial base station with integrated base station functions and/or a non-terrestrial network device with a transparent transmission function.
  • non-terrestrial base stations with integrated base station functions can be satellites, high-altitude aircraft (unmanned aerial systems), ship systems, or other non-terrestrial base stations that can serve as wireless communications, such as non-terrestrial evolved base stations and 5G base stations. Also for example, it may be a Beidou satellite with a transparent transmission function. Another example is some non-terrestrial network devices that do not have base station functions and only support transparent transmission functions.
  • the network device only performs transparent transmission, which helps to simplify the implementation of network switching between the terminals covered by different non-terrestrial base stations/non-terrestrial network devices, making network switching smoother and avoiding interruptions.
  • the network situation is convenient for users to use to improve user experience.
  • FIG. 5 shows a schematic flowchart of another non-terrestrial network switching method in an embodiment of the present disclosure.
  • the non-terrestrial network switching method 500 provided in this embodiment may include the following steps:
  • the terminal regularly receives cell coverage information sent by the source base station through the network device according to a preset period, and the cell coverage information includes cell center location information and cell radius information.
  • the terminal may determine the first threshold according to the cell radius information.
  • the period may be set between 10ms-80ms.
  • a is a scaling factor and a ⁇ (0,1)
  • R is a cell radius.
  • the cell edge information also helps the terminal judge the coverage of the cell where it is located. Further, the terminal sets the scaling factor a in the first threshold according to the size of the cell coverage, for example, when When the cell coverage is large, the precision of the scaling factor a is 0.1, that is, the value range of a ⁇ a
  • a 0.1*n,n ⁇ Z:1 ⁇ n ⁇ 9 ⁇ ; when the cell coverage is small, The precision of the scaling factor a can be set higher, for example, 0.01, that is, the value range of a ⁇ a
  • a 0.01*n,n ⁇ Z:1 ⁇ n ⁇ 99 ⁇ .
  • the terminal receives the cell center location information sent by the source base station through regular broadcast by the network equipment.
  • the cell center location information and the cell radius information are sent to the terminal by broadcasting a System Information Block (SIB) message or defining a new SIB message.
  • SIB System Information Block
  • the central location information of the terminal is represented by latitude and longitude.
  • the terminal determines the network coverage of the source cell of the source base station through the cell radius information, thereby determining the first threshold as the cell edge.
  • each ground base station may establish a communication connection with one or more network devices, and a cell is an area covered by each network device.
  • a cell covered by each network device has a corresponding identifier, and each identifier can be used to identify a unique cell.
  • the terminal judges whether the distance from the center of the cell exceeds a first threshold.
  • the first threshold may be the maximum allowable Euclidean distance between the location of the terminal and the location information of the cell center, and the first threshold cannot exceed the radius of the cell at most.
  • step S510 and step S520 determining the location of the center of the cell and the edge of the cell based on the location information is more accurate than judging by measuring signal quality and power, and further, it is beneficial to the accuracy of network handover.
  • the terminal triggers measurement reporting, and sends the measurement information to the source base station through the network device, and sends the measurement information to the source base station through the network device.
  • This step S530 is similar to the step S230 in FIG. 2 , and will not be repeated here.
  • the terminal receives the handover information sent by the source base station through the network device.
  • Step S540 is similar to step S240 in FIG. 2 , and will not be repeated here.
  • the terminal performs configuration according to the received handover information sent by the source base station, and sends a feedback message of successful configuration to the source base station.
  • the source base station if the source base station does not receive the feedback message that the terminal configuration is successful, the source base station will repeatedly send the candidate base station and the second threshold value to the terminal, thereby providing a guarantee for the terminal to perform network switching .
  • S560 Determine whether the distance information between the terminal location and the cell center location is the second threshold.
  • the network switching process ends.
  • This step S570 is similar to S250 in FIG. 2 , and will not be repeated here.
  • the terminal By executing the above method, based on the broadcast information of the base station, the relative position information received, and the relationship with the first threshold value guide the terminal to report the measurement and report of the network condition handover, especially the signal quality difference between the center of the cell and the edge of the cell is not large enough to pass the
  • the success rate and accuracy of network switching can be significantly improved, the continuity of network equipment services can be further enhanced, and the network service quality can be improved.
  • it can also assist the source base station to select a better target network, further improving the network service quality and user experience.
  • the terminal improves the accuracy of network handover triggering by configuring the second threshold value as the location threshold for triggering network handover.
  • the configuration feedback message sent by the terminal to the source base station can also ensure the accuracy and success rate of network handover performed by the terminal.
  • the network device is a non-terrestrial base station with integrated base station functions and/or a non-terrestrial network device with a transparent transmission function.
  • non-terrestrial base stations with integrated base station functions can be satellites, high-altitude aircraft (unmanned aerial systems), ship systems, or other non-terrestrial base stations that can serve as wireless communications, such as non-terrestrial evolved base stations and 5G base stations. Also for example, it may be a Beidou satellite with a transparent transmission function. Another example is some non-terrestrial network devices that do not have base station functions and only support transparent transmission functions.
  • the network device only performs transparent transmission, which can realize low-cost and low-risk switching of non-terrestrial networks.
  • Fig. 6 shows a schematic flowchart of another non-terrestrial network handover method in the embodiment of the present disclosure, and the method provided in the embodiment of the present disclosure can be executed by any type of base station.
  • the ground source base station passes through the network device 140 as the execution subject for illustration.
  • the non-terrestrial network handover method 600 provided in this embodiment may include the following steps:
  • the source base station sends cell center coverage information to the terminal through the network device, where the cell coverage information includes cell center location information.
  • the cell center coverage information sent by the source base station to the terminal through the network device may also include cell radius information.
  • the cell coverage information may also include a first threshold value, which is used to instruct the terminal to trigger measurement reporting.
  • the source base station broadcasts and sends the cell center location information through a network device.
  • the above information is sent to the terminal by broadcasting a system information block (System Information Block, SIB) message or defining a new SIB message.
  • SIB System Information Block
  • the location information of the cell center may be expressed in the form of latitude and longitude coordinates.
  • each ground base station establishes a communication connection with one or more network devices, and a cell is an area covered by each network device.
  • a cell covered by each network device has a corresponding identifier, and each identifier can be used to identify a unique cell.
  • the source base station receives measurement information sent by the terminal through the network device, where the measurement information is a measurement result triggered when the location information of the terminal and the cell center exceeds a first threshold.
  • the source base station obtains handover information according to the measurement information, and sends the handover information to the terminal through the network device.
  • the handover information includes candidate cell configuration information and a second threshold value.
  • the handover information is used to achieve the relative distance between the terminal location and the cell center location information.
  • the second threshold triggers the terminal to perform network handover to the candidate cell.
  • the source base station may set the second threshold according to the relative distance between the location information of the terminal and the center of the cell.
  • the source base station enables the terminal to automatically trigger network handover by broadcasting cell location information, especially when the difference in signal quality between the center of the cell and the edge of the cell is small and the network handover cannot be performed through channel measurement information
  • the success rate and accuracy of network switching can be significantly improved, the continuity of non-terrestrial network services is further enhanced, and the quality of network services is improved.
  • the source base station improves the accuracy of triggering and executing network handover by the user terminal by setting the second threshold value.
  • the network device is a non-terrestrial base station with integrated base station functions and/or a non-terrestrial network device with a transparent transmission function.
  • non-terrestrial base stations with integrated base station functions can be satellites, high-altitude aircraft (unmanned aerial systems), ship systems, or other non-terrestrial base stations that can serve as wireless communications, such as non-terrestrial evolved base stations and 5G base stations. Also for example, it may be a Beidou satellite with a transparent transmission function. Another example is some non-terrestrial network devices that do not have base station functions and only support transparent transmission functions.
  • the methods of the embodiments of the present disclosure only need to perform network configuration and data processing functions at the source base station, and the network devices of the present disclosure only perform transparent transmission, which can effectively avoid accurate network switching due to large time delay and poor stability of non-terrestrial network devices.
  • Low-cost and low-risk handover of non-terrestrial networks can be realized on the basis of accurately improving the handover accuracy and success rate of cells covered by non-terrestrial base stations.
  • Fig. 7 shows a schematic flowchart of another non-terrestrial network handover method in an embodiment of the present disclosure.
  • the non-terrestrial network handover method 700 provided in this embodiment may include the following steps:
  • the source base station sends cell coverage information to the terminal through the network device, where the cell coverage information includes cell center location information.
  • the source base station may regularly send the cell coverage information through the network device according to a preset period, and the cell coverage information includes the location of the center of the cell.
  • the source base station receives measurement information sent by the terminal through the network device.
  • the source base station determines handover information according to the measurement information.
  • the source base station sends the handover information to the terminal through the network device.
  • Steps S710-S740 are similar to steps S610-S630 in FIG. 6, and will not be repeated here.
  • the source base station judges whether the terminal has finished configuring handover information.
  • the configuration information of network handover may include frequency point information of candidate base stations, and the terminal may directly determine the measurement object without referring to the measurement configuration.
  • the source base station does not need to transparently transmit the measurement configuration information of the candidate base station through the network equipment, thereby reducing network signaling overhead.
  • the source base station if it does not receive the feedback message that the terminal configuration is successful, it will resend the handover information to the terminal, so as to ensure that the terminal completes the configuration of the handover information, and provides guarantee for the network handover of the terminal.
  • the source base station sets the second threshold value as the condition for the terminal to trigger network switching, which improves the accuracy of triggering network switching. Furthermore, the configuration feedback message sent by the terminal is received by the source base station, which further provides a guarantee for the terminal to perform network switching, thereby increasing the success rate of the terminal performing network switching, enhancing the continuity of network equipment services, and improving the network service quality.
  • the network device is a non-terrestrial base station with integrated base station functions and/or a non-terrestrial network device with a transparent transmission function.
  • non-terrestrial base stations with integrated base station functions can be satellites, high-altitude aircraft (unmanned aerial systems), ship systems, or other non-terrestrial base stations that can serve as wireless communications, such as non-terrestrial evolved base stations and 5G base stations. Also for example, it may be a Beidou satellite with a transparent transmission function. Another example is some non-terrestrial network devices that do not have base station functions and only support transparent transmission functions.
  • the method of the embodiment of the present disclosure only needs to guide the terminal to perform network switching at the source base station, and the network device of the present disclosure only performs transparent transmission, which can realize low-cost and low-risk switching of non-terrestrial networks.
  • FIG. 8 shows a schematic diagram of a signaling interaction process of a non-terrestrial network switching method in an embodiment of the present disclosure.
  • the signaling interaction of the non-terrestrial network switching method 800 provided in this embodiment may include the following steps:
  • the source base station sends cell coverage information to the network device, where the cell coverage information includes center location information.
  • the cell coverage information may be in the form of coordinates, for example (longitude, latitude).
  • the network device sends the cell coverage information to the terminal.
  • the network device may broadcast and send the cell center location information and/or cell radius information to the terminal through a system information block (System Information Block, SIB) or define a new SIB message.
  • SIB System Information Block
  • the terminal judges whether the distance from the center of the cell exceeds a first threshold.
  • the terminal calculates the relative location of the terminal in real time according to the immediately received cell location information, and determines the cell edge location and the first threshold based on the cell radius information.
  • the method for determining the first threshold value is similar to step S510 in FIG. 5 , and will not be repeated here.
  • the terminal sends measurement information to the network device.
  • This step is similar to step S530 in FIG. 5 and step S230 in FIG. 2 , and will not be repeated here.
  • the network device sends measurement information to the source base station.
  • the terminal when the distance between the terminal location and the center of the cell exceeds the first threshold, the terminal automatically triggers the measurement of RSRP and RSRQ of neighboring cells, and sends the terminal location and measurement results as a measurement report to the source base station.
  • the source base station determines handover information according to the measurement information, where the handover information includes candidate cell configuration information and a second threshold.
  • the source base station may also send a handover request to the candidate base station, so as to ensure robustness of non-terrestrial network handover.
  • the candidate base station sends a handover confirmation to the source base station as a response.
  • the source base station sends handover information to the network device.
  • the network device sends switching information to the terminal.
  • the network device sends the switching information to the terminal through a radio resource connection (Radio Resource Control, RRC) message.
  • RRC Radio Resource Control
  • the terminal judges whether the distance from the cell center reaches a second threshold, and if the distance between the terminal and the cell center reaches the second threshold, perform network handover to the candidate cell.
  • the terminal receives the broadcast information of the source base station, and automatically triggers the measurement report according to the location information in the broadcast information.
  • the signaling overhead of the network handover process is saved.
  • using The above method can significantly improve the success rate and accuracy of network switching when the difference in signal quality between the center of the cell and the edge of the cell is small and the network switching cannot be performed through the measurement information of the channel.
  • a simplified network switching implementation method can be realized, making network switching smoother. Improve user experience.
  • the network device is a non-terrestrial base station with integrated base station functions and/or a non-terrestrial network device with a transparent transmission function.
  • non-terrestrial base stations with integrated base station functions can be satellites, high-altitude aircraft (unmanned aerial systems), ship systems, or other non-terrestrial base stations that can serve as wireless communications, such as non-terrestrial evolved base stations and 5G base stations. Also for example, it may be a Beidou satellite with a transparent transmission function. Another example is some non-terrestrial network devices that do not have base station functions and only support transparent transmission functions.
  • the method of the embodiment of the present disclosure only needs to perform network configuration and data processing functions at the source base station, and the network device of the present disclosure only performs transparent transmission, which can realize low-cost and low-risk switching of non-terrestrial networks.
  • FIG. 9 shows a structural block diagram of a non-terrestrial network switching device in an embodiment of the present disclosure
  • the non-terrestrial network switching device 900 provided in this embodiment includes the following modules, including:
  • the first receiving module 910 is configured for the terminal to receive cell coverage information from the source base station sent by the network device, where the cell coverage information includes cell center location information;
  • the first judging module 920 is used to judge whether the distance between the terminal and the center of the cell exceeds a first threshold
  • Trigger measurement reporting module 930 configured to trigger measurement reporting by the terminal when the distance between the location of the terminal and the center of the cell exceeds a first threshold, and send the measurement information to the source base station through the network device;
  • the second receiving module 940 is used for the terminal to receive handover information from the source base station sent by the network device, the handover information is determined according to the measurement information, and the handover information includes configuration information of candidate cells and a second threshold;
  • the second judging module 950 is configured to trigger a network handover to a candidate cell when the terminal judges that the distance from the center of the cell reaches a second threshold.
  • the terminal automatically triggers network switching through location information, especially when the signal quality difference between the center of the cell and the edge of the cell is not large enough to perform network switching through channel measurement information, the success rate of network switching can be significantly improved and accuracy.
  • the present application guides the terminal to report the measurement of the network handover based on the relationship between the relative position information and the first threshold value, which can assist the source base station to select a better target network and further improve the network service quality.
  • Fig. 10 shows a structural block diagram of another non-terrestrial network switching device 1000 in an embodiment of the present disclosure; as shown in Fig. 10 , the non-terrestrial network switching device 1000 provided in this embodiment includes the following modules, including:
  • the first sending module 1010 is used for the source base station to send cell coverage information to the terminal through the network device, where the cell coverage information includes cell center location information;
  • the receiving module 1020 is used for the source base station to receive the measurement information sent by the terminal through the network device, where the measurement information is the measurement result triggered when the location information between the terminal and the cell center exceeds a first threshold;
  • a determination module 1030 configured for the source base station to determine handover information according to the measurement information
  • the second sending module 1040 is configured to send handover information to the terminal through the network device, where the handover information includes candidate cell configuration information and a second threshold value.
  • the source base station automatically triggers the network switching by the terminal by broadcasting the cell location information, especially when the signal quality difference between the cell center and the cell edge is small and the network switching cannot be performed through the measurement information of the channel, it can be significantly improved.
  • the success rate and accuracy of network switching Furthermore, by setting the second threshold value, the source base station can also improve the accuracy of triggering the terminal to perform network handover.
  • FIG. 11 An electronic device 1100 according to this embodiment of the present invention is described below with reference to FIG. 11 .
  • the electronic device 1100 shown in FIG. 11 is only an example, and should not limit the functions and scope of use of this embodiment of the present invention.
  • electronic device 1100 takes the form of a general-purpose computing device.
  • the components of the electronic device 1100 may include, but are not limited to: at least one processing unit 1110 mentioned above, at least one storage unit 1120 mentioned above, at least one transceiver 1170 for communicating with other devices, connecting different system components (including the storage unit 1120 and the processing unit 1110) of the bus 1130.
  • the storage unit stores program codes, and the program codes can be executed by the processing unit 1110, so that the processing unit 1110 executes various exemplary methods according to the present invention described in the above "Exemplary Methods" section of this specification. Implementation steps.
  • the processing unit 1110 may execute step S210 as shown in FIG.
  • the terminal receives the cell coverage information sent by the source base station through the network equipment, the cell coverage information includes the cell center location information; step S220, the terminal judges and the cell center location Whether the distance exceeds the first threshold value; step S230, when the distance between the position of the terminal and the center of the cell exceeds the first threshold value, the terminal triggers a measurement report, and sends the measurement information to the source base station through the network device; Step S240, the terminal receives handover information from the source base station through the network equipment, the handover information sent by the source base station is determined according to the measurement information, and the handover information includes candidate cell configuration information and a second threshold; step S250, when the terminal judges that the cell When the distance from the central location reaches the second threshold, the terminal triggers the network to switch to the candidate cell.
  • the storage unit 1120 may include a readable medium in the form of a volatile storage unit, such as a random access storage unit (RAM) 1121 and/or a cache storage unit 1122 , and may further include a read-only storage unit (ROM) 1123 .
  • RAM random access storage unit
  • ROM read-only storage unit
  • Storage unit 1120 may also include programs/utilities 1124 having a set (at least one) of program modules 1125, such program modules 1125 including but not limited to: an operating system, one or more application programs, other program modules, and program data, Implementations of networked environments may be included in each or some combination of these examples.
  • Bus 1130 may represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local area using any of a variety of bus structures. bus.
  • the electronic device 1100 can also communicate with one or more external devices (such as keyboards, pointing devices, Bluetooth devices, etc.), and can also communicate with one or more devices that enable the user to interact with the electronic device 1100, and/or communicate with the device that enables the user to interact with the electronic device 1100
  • the electronic device 1100 is capable of communicating with any device (eg, router, modem, etc.) that communicates with one or more other computing devices. Such communication may occur through input/output (I/O) interface 1150 .
  • the electronic device 1100 can also communicate with one or more networks (such as a local area network (LAN), a wide area network (WAN) and/or a public network such as the Internet) through the network adapter 1160 .
  • networks such as a local area network (LAN), a wide area network (WAN) and/or a public network such as the Internet
  • the network adapter 1160 communicates with other modules of the electronic device 1100 through the bus 1130 .
  • other hardware and/or software modules may be used in conjunction with electronic device 1100, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives And data backup storage system, etc.
  • An embodiment of the present disclosure further provides a computer program product, which implements the steps of the non-terrestrial network switching method in any of the above method embodiments when the computer program product is executed by a computer.
  • the example implementations described here can be implemented by software, or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of the present disclosure can be embodied in the form of software products, and the software products can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.) or on the network , including several instructions to make a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) execute the method according to the embodiments of the present disclosure.
  • a computing device which may be a personal computer, a server, a terminal device, or a network device, etc.
  • a computer-readable storage medium on which a program product capable of implementing the above-mentioned method in this specification is stored.
  • various aspects of the present invention can also be implemented in the form of a program product, which includes program code, and when the program product runs on a terminal, the program code is used to make the terminal.
  • a program product for implementing the above method according to the embodiment of the present invention, it may adopt a portable compact disk read-only memory (CD-ROM) and include program codes, and may run on a terminal, such as a personal computer.
  • CD-ROM compact disk read-only memory
  • the program product of the present invention is not limited thereto.
  • a readable storage medium may be any tangible medium containing or storing a program, and the program may be used by or in combination with an instruction execution system, apparatus or device.
  • the program product may reside on any combination of one or more readable media.
  • the readable medium may be a readable signal medium or a readable storage medium.
  • the readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: electrical connection with one or more conductors, portable disk, hard disk, random access memory (RAM), read only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.
  • a computer readable signal medium may include a data signal carrying readable program code in baseband or as part of a carrier wave. Such propagated data signals may take many forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the foregoing.
  • a readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transport a program for use by or in conjunction with an instruction execution system, apparatus, or device.
  • Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
  • Program code for carrying out the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages—such as Java, C++, etc., as well as conventional procedural programming languages. Programming language - such as "C" or a similar programming language.
  • the program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server to execute.
  • the remote computing device may be connected to the user computing device through any kind of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., using an Internet service provider). business to connect via the Internet).
  • LAN local area network
  • WAN wide area network
  • Internet service provider an Internet service provider
  • steps of the methods of the present disclosure are depicted in the drawings in a particular order, there is no requirement or implication that the steps must be performed in that particular order, or that all illustrated steps must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step for execution, and/or one step may be decomposed into multiple steps for execution, etc.
  • the technical solutions according to the embodiments of the present disclosure can be embodied in the form of software products, and the software products can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.) or on the network , including several instructions to make a computing device (which may be a personal computer, a server, a mobile terminal, or a network device, etc.) execute the method according to the embodiments of the present disclosure.
  • a non-volatile storage medium which can be CD-ROM, U disk, mobile hard disk, etc.
  • a computing device which may be a personal computer, a server, a mobile terminal, or a network device, etc.

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Abstract

La présente divulgation concerne un procédé et un appareil de commutation de réseau non terrestre, un support de stockage et un dispositif électronique. Le procédé comprend les étapes suivantes : un terminal reçoit des informations de couverture de cellule qui sont envoyées par un dispositif de réseau et proviennent d'une station de base source, les informations de couverture de cellule comprenant des informations d'une position centrale de cellule ; le terminal détermine si la distance entre le terminal et la position centrale de la cellule dépasse un premier seuil ; lorsque la distance entre la position du terminal et la position centrale de cellule dépasse le premier seuil, le terminal déclenche un rapport de mesure, et envoie des informations de mesure à la station de base source au moyen du dispositif de réseau ; le terminal reçoit des informations de commutation en provenance de la station de base source au moyen du dispositif de réseau, les informations de commutation envoyées par la station de base source étant déterminées en fonction des informations de mesure, et les informations de commutation comprenant des informations de configuration d'une cellule candidate et un second seuil ; et lorsque le terminal détermine que la distance entre le terminal et la position centrale de cellule atteint le second seuil, le terminal déclenche une commutation de réseau vers la cellule candidate. Ainsi, le taux de réussite et la précision de commutation de réseau sont améliorés, la continuité d'un service de réseau est encore améliorée, et la qualité du service de réseau est améliorée.
PCT/CN2022/107544 2021-08-03 2022-07-22 Procédé et appareil de commutation de réseau non terrestre, support de stockage et dispositif électronique Ceased WO2023011227A1 (fr)

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