WO2021259181A1

WO2021259181A1 - Terminal switching method, and device and medium

Info

Publication number: WO2021259181A1
Application number: PCT/CN2021/101160
Authority: WO
Inventors: 康绍莉; 缪德山; 孙建成; 孙韶辉; 王映民
Original assignee: 大唐移动通信设备有限公司
Priority date: 2020-06-22
Filing date: 2021-06-21
Publication date: 2021-12-30
Also published as: CN113905420A

Abstract

Disclosed are a terminal switching method, and a device and a medium. The method comprises: a network side acquiring a communication parameter of a terminal; and according to the communication parameter and a preset switching policy, the network side instructing the terminal to switch from a current non-ground network cell to a ground network cell or instructing the terminal to switch from a ground network cell to a non-ground network cell.

Description

Terminal switching method, equipment and medium

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 202010573068.4 filed in China on June 22, 2020, the entire content of which is incorporated herein by reference.

Technical field

The present disclosure relates to the field of wireless communication technology, and in particular to a terminal switching method, device and medium.

Background technique

Based on the fifth generation of mobile communications technology ^{(5 th Generation Mobile Communication Technology,} 5G) Star blend of technology, will also promote the development of satellite and terrestrial networks, represented by non-terrestrial networks. Facing the future, terrestrial networks and non-terrestrial networks based on 5G or enhanced technologies will exist at the same time, and more and more handheld terminals will support both terrestrial networks and non-terrestrial networks.

Both terrestrial and non-terrestrial networks have their own advantages and disadvantages. Among them, the terrestrial network can provide low-latency, high-reliability, high-speed voice and data transmission services for the terminal, but the construction cost of the terrestrial network is relatively high. Although it covers a large population, its coverage is relatively limited. The non-terrestrial network has the advantages of wide coverage and good survivability, and can also provide broadband services for the terminal. Therefore, it can be used as a supplementary coverage of the terrestrial network, and it can work with the terrestrial network to provide users with a better user experience.

For handheld terminals that support both non-terrestrial networks and terrestrial networks, when they are connected to non-terrestrial networks, they can obtain wide-area coverage and can carry out medium-rate data transmission services; while in areas with better ground coverage, they can Connect to the ground network to achieve high-speed, low-latency data transmission. Therefore, how to realize the flexible switching of the handheld terminal between the non-terrestrial network and the terrestrial network to ensure the success rate of the switching and the continuity of the business is a crucial technical issue.

The disadvantage of the related technology is that there is no related solution for the time being.

Summary of the invention

The present disclosure provides a terminal switching method, equipment and medium, which are used to realize the flexible switching of the terminal between the non-terrestrial network and the terrestrial network for the handheld terminal that supports both the non-terrestrial network and the terrestrial network, so as to ensure the success rate of the handover and Continuity of business.

Some embodiments of the present disclosure provide a terminal handover method, including:

The network side obtains the communication parameters of the terminal;

The network side instructs the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell or instructs the terminal to switch from the terrestrial network cell to the non-terrestrial network cell according to the communication parameters and the preset switching strategy.

In implementation, the preset handover strategy includes one or a combination of the following strategies:

The radio resource management RRM measurement value of the non-terrestrial network cell is lower than the first threshold value, and the RRM measurement value of the terrestrial network cell is higher than the second threshold value, instructing the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell; or ,

The terminal is at the edge of a non-terrestrial network cell and the non-terrestrial network has no new aerospace equipment to continue to provide connection services for the user, and the RRM measurement value of the terrestrial network cell is higher than the third threshold, indicating that the terminal is from the current non-terrestrial network cell Handover to the terrestrial network cell; or,

The channel quality indicator CQI of the terrestrial network cell is better than the fourth threshold, indicating that the terminal is handed over from the current non-terrestrial network cell to the terrestrial network cell; or,

There are other non-terrestrial networks with other orbital heights in the working frequency bands of non-terrestrial network cells. When two non-terrestrial networks interfere with each other in the same coverage area, instruct the terminal to switch from the non-terrestrial network The cell is handed over to the terrestrial network cell; or,

The RRM measurement value of the ground network cell is lower than the fifth threshold value, and the RRM measurement value of the non-ground network cell is higher than the sixth threshold value, indicating the terminal to switch from the ground network cell to the non-ground network cell; or,

The current serving ground network cell does not have an adjacent ground network cell, and the RRM measurement of the non-ground network cell is higher than the seventh threshold, instructing the terminal to switch from the ground network cell to the non-ground network cell; or,

The moving speed of the terminal exceeds the eighth threshold value, instructing the terminal to switch from a ground network cell to a non-ground network cell.

In implementation, it further includes:

Receive the communication parameters reported by the terminal.

In implementation, the communication parameters include one or a combination of the following parameters:

Location information, speed information, RRM measurement value of the serving cell, RRM measurement value of the target cell, CQI information of the serving cell, CQI information of the target cell.

The terminal receives the handover instruction from the network side;

According to the handover instruction, the terminal switches from the current non-terrestrial network cell to the terrestrial network cell, or switches from the terrestrial network cell to the non-terrestrial network cell.

In implementation, it further includes:

The terminal reports the communication parameters to the network side.

Some embodiments of the present disclosure provide a network side device, including:

The processor is used to read the program in the memory and execute the following process:

Obtain the communication parameters of the terminal;

According to the communication parameters and the preset handover strategy, instruct the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell, or instruct the terminal to switch from the terrestrial network cell to the non-terrestrial network cell;

Transceiver, used to receive and send data under the control of the processor.

The RRM measurement value of the non-terrestrial network cell is lower than the first threshold value, and the RRM measurement value of the terrestrial network cell is higher than the second threshold value, indicating the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell; or,

The terminal is at the edge of a non-terrestrial network cell and the non-terrestrial network does not have new aerospace equipment to continue to provide connection services for the user, and the RRM measurement value of the terrestrial network cell is higher than the third threshold, indicating that the terminal is from the current non-terrestrial network cell Handover to the terrestrial network cell; or,

The CQI of the ground network cell is better than the fourth threshold value, indicating that the terminal is handed over from the current non-ground network cell to the ground network cell; or,

In implementation, it further includes:

Receive the communication parameters reported by the terminal.

Some embodiments of the present disclosure provide a terminal, including:

Receive a handover instruction from the network side;

According to the handover instruction, switch from a current non-terrestrial network cell to a terrestrial network cell, or switch from a terrestrial network cell to a non-terrestrial network cell;

Transceiver, used to receive and send data under the control of the processor.

In implementation, it further includes:

Report communication parameters to the network side.

Some embodiments of the present disclosure provide a terminal switching device, including:

The obtaining module is used to obtain the communication parameters of the terminal;

The instruction module is used to instruct the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell, or to instruct the terminal to switch from the terrestrial network cell to the non-terrestrial network cell according to the communication parameters and the preset switching strategy.

The receiving module is used to receive the handover instruction from the network side;

The handover module is used to switch from the current non-terrestrial network cell to the terrestrial network cell or from the terrestrial network cell to the non-terrestrial network cell according to the handover instruction.

In some embodiments of the present disclosure, a computer-readable storage medium is provided, and the computer-readable storage medium stores a computer program for executing the foregoing terminal switching method.

The beneficial effects of the present disclosure are as follows:

In the technical solutions provided by some embodiments of the present disclosure, since the network side can instruct the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell according to the communication parameters and the preset switching strategy, or instruct the terminal to switch from the terrestrial network The cell is switched to a non-terrestrial network cell, so it can support the terminal to switch between the terrestrial network and the non-terrestrial network flexibly, so that the terminal can select a suitable network for communication according to different conditions and scenarios, and improve user experience.

Description of the drawings

The drawings described here are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The exemplary embodiments and descriptions of the present disclosure are used to explain the present disclosure, and do not constitute an improper limitation of the present disclosure. In the attached picture:

FIG. 1 is a schematic diagram of the implementation process of the terminal handover method on the network side in some embodiments of the present disclosure;

2 is a schematic diagram of the implementation process of the terminal handover method on the terminal side in some embodiments of the present disclosure;

3 is a schematic diagram of mixed coverage of satellite network cells and terrestrial network cells according to Embodiment 2 of the disclosure;

4 is a schematic diagram of satellite signal avoidance in the same frequency band according to Embodiment 2 of the disclosure;

FIG. 5 is a schematic diagram of the structure of a network side device in some embodiments of the present disclosure;

Fig. 6 is a schematic diagram of a terminal structure in some embodiments of the present disclosure.

detailed description

For handheld terminals that support both non-terrestrial networks and terrestrial networks, an embodiment of the present disclosure proposes a terminal switching scheme between the terrestrial network and the non-terrestrial network to ensure the handover success rate and service continuity, and improve user experience And network efficiency.

The specific embodiments of the present disclosure will be described below with reference to the accompanying drawings.

In the description process, the description will be made from the implementation of the terminal and the network side respectively, and then an example of the implementation of the two will also be given to better understand the implementation of the solutions given in the embodiments of the present disclosure. This way of explanation does not mean that the two must be implemented in cooperation or separately. In fact, when the terminal and the network side are implemented separately, they also solve the problems of the terminal side and the base station side respectively, and when the two are used in combination, Will get better technical results.

Figure 1 is a schematic diagram of the implementation process of the terminal handover method on the network side. As shown in the figure, it may include:

Step 101: The network side obtains the communication parameters of the terminal.

Step 102: The network side instructs the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell or instructs the terminal to switch from the terrestrial network cell to the non-terrestrial network cell according to the communication parameters and the preset switching strategy.

Specifically, the network side can be as follows:

1) The network side predicts the ephemeris and orbit topology information of other non-terrestrial systems in the same frequency band as the non-terrestrial network.

2) The network side notifies the terminal of the RRM measurement configuration information in a non-terrestrial network cell or a terrestrial network cell.

3) The network side receives the position information, speed information, and RRM measurement values (RSRP, RSRQ, etc.) reported by the terminal.

4) The network obtains ephemeris and orbital topology information of aerospace equipment that is not a terrestrial network.

5) The network side sets multiple RRM measurement thresholds, and configures them separately for non-terrestrial network cells and terrestrial network cells.

6) The network configures information such as the speed threshold and CQI threshold during handover decision.

7) The network side makes a comprehensive decision based on the information reported by the terminal and the ephemeris information of the aerospace equipment of the non-terrestrial network, and informs the terminal whether to switch from the current non-terrestrial network cell to the terrestrial network cell or switch from the terrestrial network cell to the non-terrestrial network cell.

Figure 2 is a schematic diagram of the implementation process of the terminal handover method on the terminal side. As shown in the figure, it may include:

Step 201: The terminal receives a handover instruction from the network side;

Step 202: The terminal switches from the current non-terrestrial network cell to the terrestrial network cell or from the terrestrial network cell to the non-terrestrial network cell according to the switching instruction.

In implementation, it can further include:

The terminal reports the communication parameters to the network side.

Correspondingly, for the network side, it can further include:

Receive the communication parameters reported by the terminal.

In specific implementation, the communication parameters may include one or a combination of the following parameters:

Location information, speed information, RRM (Radio Resource Management) measurement values of the serving cell, RRM measurement values of the target cell, CQI (Channel Quality Indicator) information of the serving cell, and CQI information of the target cell. Among them, the RRM measurement value may be RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality, Reference Signal Received Quality), etc.

Specifically, the terminal side may be as follows:

1) The terminal listens to the reference signal of the non-terrestrial network cell or the terrestrial network cell of the current serving and subsequent targets, performs RRM measurement and reports it to the network, and the RRM measurement value includes measurement values such as RSRP and RSRQ.

2) The terminal measures its own moving speed and reports it to the network.

3) The terminal measures the CQI information of the serving cell and the target cell and reports it to the network.

4) The terminal receives the ephemeris information of the non-terrestrial network cell to be measured by the network configuration or performs tracking and signal measurement on the non-terrestrial network cell based on the ephemeris information stored by the terminal itself.

5) After receiving the handover signaling of the network, the terminal performs a handover process from a non-terrestrial network cell to a terrestrial network cell or from a terrestrial network cell to a non-terrestrial network cell.

The following describes the preset switching strategy.

Specifically, when a user switches from a non-terrestrial network to a terrestrial network, the network makes a handover decision based on one of the following conditions, instructing the terminal to switch from a non-terrestrial network cell to a terrestrial network cell:

(1) The RRM measurement value of the non-terrestrial network cell is lower than the first threshold value, and the RRM measurement value of the terrestrial network cell is higher than the second threshold value.

(2) The terminal is at the edge of a non-terrestrial network cell and the non-terrestrial network has no new aerospace equipment to continue to provide connection services for the user, and the RRM measurement value of the terrestrial network cell is higher than the third threshold.

(3) When the CQI of the terrestrial network cell is better than the fourth threshold, it can provide a higher data transmission rate than the aerospace equipment of the non-terrestrial network. Therefore, the CQI of the terrestrial network cell can be better than the fourth threshold. When, instruct the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell.

(4) In the working frequency band of the non-terrestrial network cell, there are other non-terrestrial networks with other orbit heights covering the non-terrestrial network cell. When two non-terrestrial networks interfere with each other in the same coverage area.

When a user switches from a terrestrial network to a non-terrestrial network, the network makes a handover decision based on one of the following conditions, instructing the terminal to switch from a terrestrial network cell to a non-terrestrial network cell:

(1) The RRM measurement value of the terrestrial network cell is lower than the fifth threshold value, and the RRM measurement value of the non-terrestrial network cell is higher than the sixth threshold value.

(2) The currently served terrestrial network cell does not have an adjacent terrestrial network cell, and the RRM measurement of the non-terrestrial network cell is higher than the seventh threshold.

(3) The moving speed of the terminal exceeds the eighth threshold, resulting in frequent cell switching on the ground network.

The following takes a satellite network as an example to illustrate. In the implementation, the satellite network is taken as an example because the satellite network is a typical non-terrestrial network, so the satellite network is taken as an example here; however, other non-terrestrial networks are also applicable to the present disclosure. In the solutions provided by some of the embodiments, the satellite network is only used to teach those skilled in the art how to implement the present disclosure, but it does not mean that it can only be used in the satellite network. The implementation process can be combined with practical needs to determine the corresponding implementation.

Example 1:

In this example, the determination of the RRM measurement threshold is described.

In the RRM measurement process of the ground network cell and the satellite network cell, due to the difference in frequency band, antenna gain, bandwidth, and sensitivity, the switching threshold of the satellite network cell and the switching threshold of the ground network cell should be different.

In order to provide reliable communication services, the ground network cell and the satellite network cell will separately define different RRM measurement thresholds, including at least the target threshold and departure threshold of the satellite network cell, and the target threshold and departure threshold of the ground network cell. The so-called target threshold means that if the cell is switched to, the RRM measurement threshold of the cell needs to be greater than a specific value, and the departure threshold means that the user wants to switch from the cell to a new cell, and the RRM measurement value of the original cell needs to be lower than a certain value. A threshold. Setting two thresholds can alleviate the ping-pong effect, and can also avoid the inaccuracy of the instantaneous RRM measurement values in certain specific scenarios.

For example, in the process of handover from a satellite network cell to a ground network cell, when the RSRP measurement value of the satellite network cell is less than -90dbm, and the RSRP measurement of the ground network cell is greater than -92dbm, you need to consider switching from the satellite network cell to the ground network cell. Similarly, if the RSRP value of the ground network cell is less than -95dbm during the handover process from the ground network cell to the satellite network cell, and the satellite network cell is greater than -88dbm, you can consider switching from the ground network cell to the satellite network cell.

Example 2:

In this example, the cell coverage is determined based on the information of the satellite ephemeris.

In a satellite network, ephemeris information is very important. The network or terminal can determine whether there is an adjacent satellite network cell based on the ephemeris information and the topology of the satellite network cell, and determine whether the coverage is continuous.

Determination of the edge of the satellite network cell:

Based on the ephemeris information, the network obtains the direction and angle of the satellite beam, and the position information of the satellite, thereby determining the coverage of the satellite beam.

Based on the terminal's location report, the network determines whether the terminal is at the boundary of the satellite network cell.

Satellite network cell service continuity determination:

Based on the ephemeris information, the network determines the satellite coverage and satellite deployment status;

The network judges the satellite network cell ID currently served by the terminal based on the user’s location information, and then judges whether there is an adjacent satellite network cell around the user’s serving satellite network cell based on the satellite coverage information, and if not, it judges that the current satellite network cell is In an edge cell, the satellite service will be interrupted, otherwise there are candidate satellite network cells.

The handover decision based on ephemeris information and RRM measurement information can be as follows:

Generally speaking, satellite networks have two modes: global coverage and hotspot coverage. When the terminal is connected to the satellite network, if the movement of the satellite or the terminal causes the terminal to move from the center of the satellite network cell to the edge of the satellite network cell, the network needs to determine the satellite network Whether there are other satellite cells with continuous coverage in the cell, if not, the network needs to notify the terminal to measure the ground network cell, if the signal quality is higher than a certain threshold, notify the terminal to switch from the satellite network cell to the ground network cell; if there are continuous satellites In the network cell, the network further determines whether the terminal continues to be in the original cell or to the ground network cell.

Similarly, when the terminal receives data in a cell of the ground network, if the terminal moves from the cell center to the edge of the cell, the network can configure the RRM measurement information of the terminal. If it is found that the signal quality of the satellite network is better, the signal quality of the ground network cell is better When it is poor or even without continuous coverage, the terminal needs to switch from the ground network cell to the satellite network cell to ensure service continuity.

Figure 3 is a schematic diagram of the mixed coverage of the satellite network cell and the ground network cell of Embodiment 2. As shown in Figure 3, terminal A is in the center of the ground network cell and the signal quality is good. It continues to work in the ground network cell, and terminal B is on the ground At the edge of the network cell, the signal quality is poor, and the signal quality of the satellite network cell where it is located is good. Terminal B will switch from the ground network cell to the satellite network cell.

The switching decision based on the ephemeris and orbit topology information of other non-terrestrial networks in the same frequency band as the non-terrestrial network can be as follows:

According to the ITU (International Telecommunication Union, International Telecommunication Union) management rules for air frequencies and orbits, non-geostationary satellites NGSO (non-geostationary-satellite orbit) need to be Orbit, geostationary-satellite orbit) for frequency avoidance. Taking into account that GSO is in the equatorial plane, when NGSO satellites such as low-medium orbits operating in the same frequency band move to the equatorial plane, in order to avoid interference to GSO satellite signals, NGSO signal transmission is usually stopped (or called satellite shutdown). In order not to affect the communication of the terminal, the network needs to notify the terminal to switch from the satellite network cell to the ground network cell, so as to ensure the continuity of the service.

Fig. 4 is a schematic diagram of satellite signal avoidance in the same frequency band of embodiment 2. As shown in Fig. 4, the frequency band where GEO (Geostationary Earth Orbit Satellite) works is also MEO (Middle Earth Orbit Satellite) And LEO (Low Earth Orbit Satellite) system, MEO and LEO need to be turned off when running to the equator to avoid GEO satellite signals in the same frequency band.

Example 3:

In this example, the application of moving speed is explained.

When the terminal is at different moving speeds, you can choose to reside in a ground network cell or a satellite network cell.

For example, an airplane, before the airport takes off, because its speed is relatively low, or even parked on the ground, at this time, it can connect to the ground network cell and receive services from the ground network. The ground network cell becomes inappropriate, and the signal from the ground base station at high altitude cannot be covered. At this time, the aircraft switches from the ground network cell to the satellite network cell.

Similarly, for high-speed rail, drones, etc., when the speed is relatively fast, switching from a ground network cell to a satellite network cell is a more reasonable choice.

Example 4:

In this example, the service continuity judgment of the terrestrial network cell is explained.

For terrestrial cells, the base station will determine whether there are continuous serving cells around a cell through information exchange between stations or OAM (Operations, Administration and Maintenance) network management information.

Similarly, the continuity of the ground network cell can also be judged based on the user's location information, speed, and movement direction. Assuming that the user is moving toward the edge of the cell, and there is no neighboring ground network cell in this direction, the network can be based on the movement. The speed and direction determine that the user is about to move out of the coverage area of the terrestrial network cell, so as to conduct information collection and judgment on handover to the non-terrestrial network cell in advance to ensure the continuity of the service.

Based on the same inventive concept, some embodiments of the present disclosure also provide a network-side device, a terminal, a terminal switching device, and a computer-readable storage medium. Since these devices have similar problem-solving principles to the terminal switching method, these devices The implementation of the method can be referred to the implementation of the method, and the repetition will not be repeated.

When implementing the technical solutions provided by some embodiments of the present disclosure, they can be implemented as follows.

Figure 5 is a schematic diagram of the network side equipment structure, as shown in the figure, the equipment includes:

The processor 500 is configured to read a program in the memory 520 and execute the following process:

Obtain the communication parameters of the terminal;

The transceiver 510 is configured to receive and send data under the control of the processor 500.

In implementation, it further includes:

Receive the communication parameters reported by the terminal.

Wherein, in FIG. 5, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 500 and various circuits of the memory represented by the memory 520 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein. The bus interface provides the interface. The transceiver 510 may be a plurality of elements, that is, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium. The processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.

For specific implementation, refer to the implementation of the terminal handover method on the network side.

For the convenience of description, each part of the above-mentioned device is divided into various modules or units by function and described separately. Of course, when implementing the present disclosure, the functions of each module or unit can be implemented in the same one or more software or hardware.

Figure 6 is a schematic diagram of the terminal structure. As shown in the figure, the terminal includes:

The processor 600 is configured to read a program in the memory 620, and execute the following process:

Receive a handover instruction from the network side;

The transceiver 610 is configured to receive and send data under the control of the processor 600.

In implementation, it further includes:

Report communication parameters to the network side.

Location information, speed information, RRM measurement value of the serving cell, RRM measurement value of the target cell, CQI information of the serving cell, CQI information of the target cell

Wherein, in FIG. 6, the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 600 and various circuits of the memory represented by the memory 620 are linked together. The bus architecture can also link various other circuits such as peripherals, voltage regulators, power management circuits, etc., which are all known in the art, and therefore, will not be further described herein. The bus interface provides the interface. The transceiver 610 may be a plurality of elements, including a transmitter and a receiver, and provide a unit for communicating with various other devices on the transmission medium. For different user equipment, the user interface 630 may also be an interface capable of externally connecting internally required equipment. The connected equipment includes but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 can store data used by the processor 600 when performing operations.

For specific implementation, refer to the implementation of the terminal handover method on the terminal side.

For specific implementation, refer to the implementation of the terminal handover method on the network side and/or the terminal side.

In summary, some embodiments of the present disclosure provide solutions for switching between a terrestrial network and a non-terrestrial network for a terminal, and specifically provide:

When a terminal user switches from a non-terrestrial network to a terrestrial network, the network makes a handover decision based on one of the following conditions, instructing the terminal to switch from a non-terrestrial network cell to a terrestrial network cell:

The RRM measurement value (RSRP, RSRQ) of the non-terrestrial network cell is lower than the preset first threshold value, and the RRM measurement value of the terrestrial network cell is higher than the preset second threshold value.

The terminal is at the edge of the non-terrestrial network cell and there is no adjacent non-terrestrial network cell to continue to provide communication services for the terminal, and the RRM measurement of the terrestrial network cell is higher than the preset third threshold value.

The CQI of the ground network cell is better than the fourth threshold.

There are other non-terrestrial networks with other orbital heights in the working frequency band of the non-terrestrial network cell that are covering the non-terrestrial network cell. When two non-terrestrial networks interfere with each other in the same coverage area.

When a terminal user switches from a terrestrial network to a non-terrestrial network, the network makes a handover decision based on one of the following conditions, instructing the terminal to switch from a terrestrial network cell to a non-terrestrial network cell:

The RRM measurement value of the ground network cell is lower than the preset fifth threshold value, and the RRM measurement value of the non-terrestrial network cell is higher than the preset sixth threshold value.

The currently served terrestrial network cell has no adjacent terrestrial network cell, and the RRM measurement of the non-terrestrial network cell is higher than the preset seventh threshold.

The moving speed of the terminal exceeds the eighth threshold.

Adopting this solution can support the terminal to switch between the terrestrial network and the non-terrestrial network flexibly, so that the terminal can select a suitable network for communication according to different conditions and scenarios, and improve user experience.

Those skilled in the art should understand that the embodiments of the present disclosure can be provided as a method, a system, or a computer program product. Therefore, the present disclosure may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) containing computer-usable program codes.

The present disclosure is described with reference to flowcharts and/or block diagrams of methods, devices (systems), and computer program products according to some embodiments of the present disclosure. It should be understood that each process and/or block in the flowchart and/or block diagram, and the combination of processes and/or blocks in the flowchart and/or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing equipment to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing equipment are used to generate It is a device that realizes the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device. The device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.

These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment. The instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.

Each module, unit, sub-unit or sub-module may be one or more integrated circuits configured to implement the above method, for example: one or more application specific integrated circuits (ASIC), or, one or more Microprocessor (digital signal processor, DSP), or, one or more Field Programmable Gate Array (Field Programmable Gate Array, FPGA), etc. For another example, when one of the above modules is implemented in the form of processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call program codes. For another example, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).

Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. In this way, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and equivalent technologies, the present disclosure also intends to include these modifications and variations.

Claims

A terminal switching method includes:

The network side obtains the communication parameters of the terminal;

The network side instructs the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell or instructs the terminal to switch from the terrestrial network cell to the non-terrestrial network cell according to the communication parameters and the preset switching strategy.
The method of claim 1, wherein the preset handover strategy includes one or a combination of the following strategies:

The radio resource management RRM measurement value of the non-terrestrial network cell is lower than the first threshold, and the RRM measurement value of the terrestrial network cell is higher than the second threshold, indicating the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell; or ,

The terminal is at the edge of a non-terrestrial network cell and the non-terrestrial network does not have new aerospace equipment to continue to provide connection services for the user, and the RRM measurement value of the terrestrial network cell is higher than the third threshold, indicating that the terminal is from the current non-terrestrial network cell Handover to the terrestrial network cell; or,

The channel quality indicator CQI of the terrestrial network cell is better than the fourth threshold, indicating that the terminal is handed over from the current non-terrestrial network cell to the terrestrial network cell; or,

There are other non-terrestrial networks with other orbital heights in the working frequency bands of non-terrestrial network cells. When two non-terrestrial networks interfere with each other in the same coverage area, instruct the terminal to switch from the non-terrestrial network The cell is handed over to the terrestrial network cell; or,

The RRM measurement value of the ground network cell is lower than the fifth threshold value, and the RRM measurement value of the non-ground network cell is higher than the sixth threshold value, indicating the terminal to switch from the ground network cell to the non-ground network cell; or,

The current serving ground network cell does not have an adjacent ground network cell, and the RRM measurement of the non-ground network cell is higher than the seventh threshold, instructing the terminal to switch from the ground network cell to the non-ground network cell; or,

The moving speed of the terminal exceeds the eighth threshold value, instructing the terminal to switch from a ground network cell to a non-ground network cell.
The method of claim 1, further comprising:

Receive the communication parameters reported by the terminal.
The method according to claim 1 or 3, wherein the communication parameter includes one of the following parameters or a combination thereof:

Location information, speed information, RRM measurement value of the serving cell, RRM measurement value of the target cell, CQI information of the serving cell, CQI information of the target cell.
A terminal switching method includes:

The terminal receives the handover instruction from the network side;

According to the handover instruction, the terminal switches from the current non-terrestrial network cell to the terrestrial network cell, or switches from the terrestrial network cell to the non-terrestrial network cell.
The method of claim 5, further comprising:

The terminal reports the communication parameters to the network side.
The method according to claim 5 or 6, wherein the communication parameter includes one of the following parameters or a combination thereof:

Location information, speed information, RRM measurement value of the serving cell, RRM measurement value of the target cell, CQI information of the serving cell, CQI information of the target cell.
A network side device, including:

The processor is used to read the program in the memory and execute the following process:

Obtain the communication parameters of the terminal;

According to the communication parameters and the preset handover strategy, instruct the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell, or instruct the terminal to switch from the terrestrial network cell to the non-terrestrial network cell;

Transceiver, used to receive and send data under the control of the processor.
The device according to claim 8, wherein the preset handover strategy includes one or a combination of the following strategies:

The RRM measurement value of the non-terrestrial network cell is lower than the first threshold value, and the RRM measurement value of the terrestrial network cell is higher than the second threshold value, indicating the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell; or,

The terminal is at the edge of a non-terrestrial network cell and the non-terrestrial network does not have new aerospace equipment to continue to provide connection services for the user, and the RRM measurement value of the terrestrial network cell is higher than the third threshold, indicating that the terminal is from the current non-terrestrial network cell Handover to the terrestrial network cell; or,

The CQI of the ground network cell is better than the fourth threshold value, indicating that the terminal is handed over from the current non-ground network cell to the ground network cell; or,

There are other non-terrestrial networks with other orbital heights in the working frequency bands of non-terrestrial network cells. When two non-terrestrial networks interfere with each other in the same coverage area, instruct the terminal to switch from the non-terrestrial network The cell is handed over to the terrestrial network cell; or,

The RRM measurement value of the ground network cell is lower than the fifth threshold value, and the RRM measurement value of the non-ground network cell is higher than the sixth threshold value, indicating the terminal to switch from the ground network cell to the non-ground network cell; or,

The current serving ground network cell does not have an adjacent ground network cell, and the RRM measurement of the non-ground network cell is higher than the seventh threshold, instructing the terminal to switch from the ground network cell to the non-ground network cell; or,

The moving speed of the terminal exceeds the eighth threshold value, instructing the terminal to switch from a ground network cell to a non-ground network cell.
The device of claim 8, wherein the transceiver is used for:

Receive the communication parameters reported by the terminal.
The device according to claim 8 or 10, wherein the communication parameter includes one of the following parameters or a combination thereof:

Location information, speed information, RRM measurement value of the serving cell, RRM measurement value of the target cell, CQI information of the serving cell, CQI information of the target cell.
A terminal including:

The processor is used to read the program in the memory and execute the following process:

Receive a handover instruction from the network side;

According to the handover instruction, switch from a current non-terrestrial network cell to a terrestrial network cell, or switch from a terrestrial network cell to a non-terrestrial network cell;

Transceiver, used to receive and send data under the control of the processor.
The terminal according to claim 12, wherein the transceiver is used for:

Report communication parameters to the network side.
The terminal according to claim 12 or 13, wherein the communication parameter includes one of the following parameters or a combination thereof:

Location information, speed information, RRM measurement value of the serving cell, RRM measurement value of the target cell, CQI information of the serving cell, CQI information of the target cell.
A terminal switching device includes:

The acquisition module is used to acquire the communication parameters of the terminal;

The instruction module is used to instruct the terminal to switch from the current non-terrestrial network cell to the terrestrial network cell, or to instruct the terminal to switch from the terrestrial network cell to the non-terrestrial network cell according to the communication parameters and the preset switching strategy.
A terminal switching device includes:

The receiving module is used to receive the handover instruction from the network side;

The handover module is used to switch from the current non-terrestrial network cell to the terrestrial network cell or from the terrestrial network cell to the non-terrestrial network cell according to the handover instruction.
A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the method described in any one of claims 1 to 7.