WO2023011227A1 - Non-terrestrial network switching method and apparatus, storage medium, and electronic device - Google Patents

Abstract

The present disclosure provides a non-terrestrial network switching method and apparatus, a storage medium, and an electronic device. The method comprises: a terminal receives cell coverage information that is sent by a network device and comes from a source base station, the cell coverage information comprising information of a cell center position; the terminal determines whether the distance between the terminal and the cell center position exceeds a first threshold; when the distance between the position of the terminal and the cell center position exceeds the first threshold, the terminal triggers measurement reporting, and sends measurement information to the source base station by means of the network device; the terminal receives switching information from the source base station by means of the network device, the switching information sent by the source base station being determined according to the measurement information, and the switching information comprising configuration information of a candidate cell and a second threshold; and when the terminal determines that the distance between the terminal and the cell center position reaches the second threshold, the terminal triggers network switching to the candidate cell. Thus, the success rate and accuracy of network switching are improved, the continuity of a network service is further enhanced, and the quality of the network service is improved.

Description

Non-terrestrial network switching method and device, storage medium and electronic equipment

Cross References to Related Applications

This application claims the priority of the Chinese patent application with the application number 202110886731.0 and titled "Non-terrestrial network switching method and device, storage medium and electronic equipment" filed on August 3, 2021. The entire content of the Chinese patent application is passed All references are incorporated herein.

technical field

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.

Background technique

5G introduces conditional handover technology in the research of terrestrial cellular network mobility enhancement to improve the robustness of handover. In conditional 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. In the non-terrestrial network (Non-Terrestrial Network, NTN) scenario, one or several satellite gateways provide continuous services for mobile terminals on the ground. Especially in the scenario of non-geosynchronous orbit satellite communication, mobile terminals are required to perform network switching without interruption to ensure the continuity of service status.

Due to the large propagation delay of the satellite, the application of the existing network switching technology in the non-terrestrial system is easy to fail. Therefore, how to improve the success rate of network switching in non-terrestrial network systems to ensure service continuity is an urgent problem to be solved.

It should be noted that the information disclosed in the above background section is only for enhancing the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art.

Contents of the invention

The purpose of the present disclosure is to provide a non-terrestrial network switching method and device, storage medium and electronic equipment.

Other features and advantages of the present disclosure will become apparent from the following detailed description, or in part, be learned by practice of the present disclosure.

According to one aspect of the present disclosure, a non-terrestrial network handover method is provided, 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.

According to another aspect of the present disclosure, a non-terrestrial network handover method is provided, 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.

According to still another aspect of the present disclosure, a non-terrestrial network handover method is provided, 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.

According to yet another aspect of the present disclosure, a non-terrestrial network switching device is provided, 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.

According to yet another aspect of the present disclosure, a non-terrestrial network switching device is provided, 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.

According to another aspect of the present disclosure, there is provided 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.

According to yet another aspect of the present disclosure, there is provided 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.

According to yet another aspect of the present disclosure, a computer program product is provided, 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.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description serve to explain the principles of the disclosure. Apparently, the drawings in the following description are only some embodiments of the present disclosure, and those skilled in the art can obtain other drawings according to these drawings without creative efforts.

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; and

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.

Detailed ways

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.

Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus repeated descriptions thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in software, or in one or more hardware modules or integrated circuits, or in different network and/or processor means and/or microcontroller means.

In addition, the terms "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. In the description of the present disclosure, "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 .

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.

The terminal 120 is connected to the network device 140 through a communication network. Optionally, 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 . At the same time, wireless links also exist between network devices 140 to complete signaling interaction and data transmission between network devices 140 .

In some optional embodiments, 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.

In some optional embodiments, different network devices 140 may be connected to the same base station 130 on the ground through gateways.

In some optional embodiments, the network device 140 may also be used to store network switching information.

Optionally, in this embodiment of the application, 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.

In some optional embodiments, 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.

It should be noted that 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.

Those skilled in the art may know that 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 .

Optionally, 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. Optionally, the communication network is a wired network or a wireless network.

Optionally, 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). In some embodiments, 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. In addition, 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. Conventional encryption techniques to encrypt all or some links. In some other embodiments, customized and/or dedicated data communication technologies may also be used to replace or supplement the above data communication technologies.

Next, each step of the non-terrestrial network handover method in this example implementation will be described in more detail with reference to the accompanying drawings and embodiments.

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 . In the following illustrations, the terminal 120 is used as an execution subject for illustration.

As shown in FIG. 2, the non-terrestrial network handover method 200 provided by the embodiment of the present disclosure 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.

In some embodiments of the present disclosure, the terminal receives the cell center location information broadcast by the source base station through the network device. In some embodiments, the above information is sent by broadcasting a system information block (System Information Block, SIB) message or defining a new SIB message.

In some embodiments of the present disclosure, the cell center location information may be expressed in the form of latitude and longitude coordinates.

In some embodiments of the present disclosure, 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.

In some embodiments of the present disclosure, 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.

In some embodiments of the present disclosure, 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. For example, the present application does not limit the setting of the first threshold. Through the above method, 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.

In some embodiments of the present disclosure, 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.

In some embodiments of the present disclosure, if the distance between the location of the terminal and the center of the cell does not exceed the first threshold, 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.

In some embodiments of the present disclosure, 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.

In some embodiments of the present disclosure, the 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.

In some embodiments of the present disclosure, 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.

Using the non-terrestrial network switching method in this disclosure, 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. In addition, 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.

In some embodiments of the present disclosure, 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.

For example, 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.

Compared with the prior art, 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. In some embodiments 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 .

In some embodiments of the present disclosure, 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 . 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. When 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.

In some embodiments, 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.

In the above scenario, 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.

In some embodiments of the present disclosure, 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.

For example, 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.

Compared with the method in the embodiments of the present disclosure, 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. In some embodiments 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 .

In some embodiments of the present disclosure, 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 . When the relative distance between the terminal location and the source base station exceeds th3, 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. When 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.

In some embodiments, 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.

In some embodiments of the present disclosure, 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 . In some embodiments of the present disclosure, 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.

In the above scenario, 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.

In some embodiments of the present disclosure, 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.

For example, 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.

In the method of the embodiment of the present disclosure, 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. As shown in FIG. 5 , the non-terrestrial network switching method 500 provided in this embodiment may include the following steps:

S510, 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.

In some embodiments of the present disclosure, the terminal may determine the first threshold according to the cell radius information.

In some embodiments of the present disclosure, the period may be set between 10ms-80ms.

Accordingly, the first threshold value th _value can be expressed as: th _value =a*R; where a is a scaling factor and a∈(0,1), and R is a cell radius. Then the first threshold value in FIG. 3 can be expressed as: th1=a*r ₁ ; the first threshold value in FIG. 4 can be expressed as: th3=a*r ₂ .

In some embodiments of the present disclosure, 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}.

In some embodiments of the present disclosure, the terminal receives the cell center location information sent by the source base station through regular broadcast by the network equipment. In some embodiments of the present disclosure, 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. In some embodiments, the central location information of the terminal is represented by latitude and longitude.

In some embodiments of the present disclosure, 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.

In some embodiments of the present disclosure, 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.

S520, the terminal judges whether the distance from the center of the cell exceeds a first threshold.

In some embodiments of the present disclosure, 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.

By executing 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.

S530. When the distance between the location of the terminal and the center of the cell exceeds the first threshold, 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.

S540, 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.

S550, 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.

In some embodiments of the present disclosure, 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.

By setting the judging step, the accuracy of the terminal performing network switching is further improved.

In some embodiments of the present disclosure, if the distance between the location of the terminal and the center of the cell is smaller than the second threshold, the network switching process ends.

S570. When the distance information between the terminal location and the cell center location is greater than a second threshold, perform network handover to the candidate cell.

This step S570 is similar to S250 in FIG. 2 , and will not be repeated here.

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 When the channel measurement information is used for network switching, 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. At the same time, it can also assist the source base station to select a better target network, further improving the network service quality and user experience.

Further, the terminal improves the accuracy of network handover triggering by configuring the second threshold value as the location threshold for triggering network handover. In addition, 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.

In some embodiments of the present disclosure, 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.

For example, 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.

Furthermore, in the method of the embodiment of the present disclosure, 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. In the following illustrations, the ground source base station passes through the network device 140 as the execution subject for illustration. As shown in FIG. 6, the non-terrestrial network handover method 600 provided in this embodiment may include the following steps:

S610, 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.

In some embodiments of the present disclosure, the cell center coverage information sent by the source base station to the terminal through the network device may also include cell radius information. Optionally, the cell coverage information may also include a first threshold value, which is used to instruct the terminal to trigger measurement reporting.

In some embodiments of the present disclosure, the source base station broadcasts and sends the cell center location information through a network device. In some embodiments, 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.

In some embodiments of the present disclosure, the location information of the cell center may be expressed in the form of latitude and longitude coordinates.

In some embodiments of the present disclosure, 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.

S620. 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.

For the description of the neighboring cell measurement results, reference may be made to the descriptions of the embodiments corresponding to FIG. 2 and FIG. 5 , and details are not repeated here.

S630. 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.

In some embodiments, 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.

Using the non-terrestrial network handover method in this disclosure, 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 Under certain circumstances, 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.

In addition, the source base station improves the accuracy of triggering and executing network handover by the user terminal by setting the second threshold value.

In some embodiments of the present disclosure, 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.

For example, 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. As shown in FIG. 7, the non-terrestrial network handover method 700 provided in this embodiment may include the following steps:

S710, 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. In some embodiments, 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.

S720, the source base station receives measurement information sent by the terminal through the network device.

S730, the source base station determines handover information according to the measurement information.

S740, 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.

S750, the source base station judges whether the terminal has finished configuring handover information.

In some disclosed embodiments, 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. Through the above method, 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.

In some embodiments of the present disclosure, if the source base station 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.

Through the above method, 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.

In some embodiments of the present disclosure, 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.

For example, 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.

Furthermore, 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. As shown in FIG. 8 , the signaling interaction of the non-terrestrial network switching method 800 provided in this embodiment may include the following steps:

S810, the source base station sends cell coverage information to the network device, where the cell coverage information includes center location information.

In some embodiments of the present disclosure, the cell coverage information may be in the form of coordinates, for example (longitude, latitude).

S820, the network device sends the cell coverage information to the terminal.

In some embodiments of the present disclosure, 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.

S830, the terminal judges whether the distance from the center of the cell exceeds a first threshold.

In some embodiments of the present disclosure, 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.

S840. When the distance between the location of the terminal and the center of the cell exceeds a first threshold, 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.

S850, the network device sends measurement information to the source base station.

In some embodiments of the present disclosure, 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.

S860, 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.

In some embodiments of the present disclosure, 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. Optionally, the candidate base station sends a handover confirmation to the source base station as a response.

S870, the source base station sends handover information to the network device.

S880. The network device sends switching information to the terminal.

In some embodiments of the present disclosure, the network device sends the switching information to the terminal through a radio resource connection (Radio Resource Control, RRC) message.

S890, 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.

To sum up, 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. Compared with the method of network handover based on the channel measurement results, the signaling overhead of the network handover process is saved. At the same time, 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.

Furthermore, whether network switching is performed between cells covered by the same non-terrestrial base station, or network switching is performed between cells covered by different non-terrestrial base stations, a simplified network switching implementation method can be realized, making network switching smoother. Improve user experience.

In some embodiments of the present disclosure, 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.

For example, 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.

It should be noted that the above-mentioned figures are only schematic illustrations of the processing included in the method according to the exemplary embodiment of the present invention, and are not intended to be limiting. It is easy to understand that the processes shown in the above figures do not imply or limit the chronological order of these processes. In addition, it is also easy to understand that these processes may be executed synchronously or asynchronously in multiple modules, for example.

FIG. 9 shows a structural block diagram of a non-terrestrial network switching device in an embodiment of the present disclosure; as shown in FIG. 9 , 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; and

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.

In the above device, 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. In addition, 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; and

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.

In the above-mentioned device, 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.

Those skilled in the art can understand that various aspects of the present invention can be implemented as systems, methods or program products. Therefore, various aspects of the present invention can be embodied in the following forms, that is: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, which can be collectively referred to herein as "circuit", "module" or "system".

For the specific implementation of each module in the device provided by the embodiment of the present disclosure, reference may be made to the content in the above method, and details are not repeated here.

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.

As shown in FIG. 11 , 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.

Wherein, 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. For example, the processing unit 1110 may execute step S210 as shown in FIG. 2, 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 .

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 . Moreover, 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 . As shown, the network adapter 1160 communicates with other modules of the electronic device 1100 through the bus 1130 . It should be appreciated that although not shown, 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.

Through the description of the above implementations, those skilled in the art can easily understand that 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.

In an exemplary embodiment of the present disclosure, there is also provided a computer-readable storage medium on which a program product capable of implementing the above-mentioned method in this specification is stored. In some possible implementations, 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 The steps described in the "Exemplary Methods" section above in this specification according to various exemplary embodiments of the present invention are performed.

According to the 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. However, the program product of the present invention is not limited thereto. In this document, 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. In cases involving a remote computing device, 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).

It should be noted that although several modules or units of the device for action execution are mentioned in the above detailed description, this division is not mandatory. Actually, according to the embodiment of the present disclosure, the features and functions of two or more modules or units described above may be embodied in one module or unit. Conversely, the features and functions of one module or unit described above can be further divided to be embodied by a plurality of modules or units.

In addition, although 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.

Through the description of the above implementations, those skilled in the art can easily understand that 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 mobile terminal, or a network device, etc.) execute the method according to the embodiments of the present disclosure.

Other embodiments of the present disclosure will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, and these modifications, uses or adaptations follow the general principles of the present disclosure and include common knowledge or conventional technical means in the technical field not disclosed in the present disclosure . The specification and examples are to be considered exemplary only, with the true scope and spirit of the disclosure indicated by the appended claims.

Claims (20)

1. A non-terrestrial network switching method, including:

   The terminal receives cell coverage information from the source base station sent by the network device, where the cell coverage information includes cell center location information;

   The terminal judges whether the distance from the center of the cell exceeds a first threshold;

   When the distance between the location of the terminal and the center of the cell exceeds the first threshold, the terminal triggers measurement reporting, and sends the measurement information to the source base station through the network device;

   The terminal receives handover 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 gate limit value; and

   When the terminal determines that the distance from the center of the cell reaches the second threshold, the terminal triggers a network handover to a candidate cell.
2. The non-terrestrial network handover method according to claim 1, wherein the cell coverage information further includes: cell radius information.
3. The non-terrestrial network handover method according to claim 2, wherein before the terminal judges whether the distance from the center of the cell exceeds the first threshold value, it further includes:

   Determine the first threshold according to the cell radius information.
4. The non-terrestrial network handover method according to claim 1, wherein before the terminal judges whether the distance from the center of the cell exceeds the first threshold, it further includes:

   The terminal receives the first threshold value from the source base station through the network device.
5. The non-terrestrial network handover method according to any one of claims 3 or 4, wherein, after the terminal receives the handover information from the source base station through the network device, it includes:

   performing configuration according to the received handover information sent by the source base station; and

   Sending a configuration success feedback message to the source base station.
6. The non-terrestrial network handover method according to claim 1, wherein the measurement information further includes: measurement results of adjacent cells and location information of the terminal.
7. The non-terrestrial network switching method according to any one of claims 1 to 6, wherein 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.
8. A non-terrestrial network switching method, including:

   The source base station sends cell coverage information, including cell center location information, to the terminal through network equipment;

   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 position information between the terminal and the cell center exceeds a first threshold; 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, the handover information includes candidate cell configuration information and a second threshold value, and the handover The 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.
9. The non-terrestrial network handover method according to claim 8, wherein the source base station sends the cell coverage information to the terminal through the network equipment, further comprising:

   The source base station regularly sends the cell coverage information to the terminal through the network device at a preset period.
10. The non-terrestrial network handover method according to claim 9, wherein the cell coverage information further includes: cell radius information, and the cell radius information is used by the terminal to determine the first threshold value.
11. The non-terrestrial network handover method according to claim 9, wherein, before the source base station receives the measurement information sent by the terminal through the network device, it further includes:

    The source base station sends the first threshold value to the terminal through the network device.
12. The non-terrestrial network handover method according to claim 10 or 11, wherein, after the source base station sends the handover information to the terminal through the network device, further comprising:

    The source base station judges whether the terminal is successfully configured with the handover information, and if the terminal is not successfully configured, resends the handover information to the terminal.
13. The non-terrestrial network handover method according to claim 8, wherein the measurement information further includes: measurement results of adjacent cells and location information of the terminal.
14. The non-terrestrial network switching method according to any one of claims 8 to 13, wherein 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.
15. A non-terrestrial network switching method, including:

    The source base station sends cell coverage information to the terminal through the network device, and the cell coverage information includes cell center location information;

    The terminal receives the cell coverage information from the source base station through the network device;

    The terminal judges whether the distance from the center of the cell exceeds a first threshold;

    When the distance between the location of the terminal and the center of the cell exceeds the first threshold, the terminal triggers measurement reporting, and sends the measurement information to the source base station through the network device;

    receiving the measurement information by the source base station;

    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, where the handover information includes candidate cell configuration information and a second threshold;

    The terminal receives handover information sent by the network device from the source base station; and

    When the terminal determines that the distance from the center of the cell reaches the second threshold, the terminal triggers a network handover to a candidate cell.
16. A non-terrestrial network switching device, including:

    The first receiving module is used 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;

    A first judging module, used for the terminal to judge whether the distance from the center of the cell exceeds a first threshold;

    a triggering measurement reporting module, configured to trigger measurement reporting by the terminal when the distance between the location of the terminal and the center of the cell exceeds the first threshold, and send the measurement information to the source base station;

    A second receiving module, configured 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; and

    A second judging module, configured for the terminal to trigger a network handover to a candidate cell when the terminal judges that the distance from the center of the cell reaches the second threshold.
17. A non-terrestrial network switching device, including:

    The first sending module is used for the source base station to send the cell coverage information to the terminal through the network equipment, and the cell coverage information includes cell center location information;

    A receiving module, configured for the source base station to receive 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;

    A determining module, configured for the source base station to determine the handover information according to the measurement information; and

    A second sending module, configured to send the handover information to the terminal through the network device, where the handover information includes candidate cell configuration information and a second threshold.
18. An electronic device, comprising:

    processor;

    a memory for storing executable instructions of the processor; and

    Transceivers for communicating with other devices;

    Wherein, the processor is configured to execute the non-terrestrial network handover method described in any one of claims 1-7 by executing the executable instructions, or to execute the method described in any one of claims 8-14. Non-terrestrial network handover method.
19. A computer-readable storage medium, on which a computer program is stored, wherein, when the computer program is executed by a processor, the non-terrestrial network switching method according to any one of claims 1-7 is implemented, or the non-terrestrial network switching method according to claim 1 is implemented. The non-terrestrial network switching method described in any one of 8-14.
20. A computer program product, including a computer program, characterized in that, when the computer program is executed by a processor, the steps of the non-terrestrial network switching method according to any one of claims 1-7 or 8-14 are implemented.

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