Communication method and device

Abstract

The embodiment of the invention discloses a communication method and device, and the method comprises the steps that first network equipment sends a first message to second network equipment, and the first message comprises the moving path information of terminal equipment; and the first network device receives a second message from the second network device, the second message including waypoint deviation tolerance degree information, and the waypoint deviation tolerance degree information is used for indicating a distance range in which the terminal device is allowed to deviate from a moving path corresponding to the moving path information. By adopting the embodiment of the invention, the limitation of different network devices on sending of the mobile path updating indication message by the terminal device can be met, so that the communication flexibility is improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0002] As a new type of aircraft, uncrewed aerial vehicle (UAV) has become increasingly popular due to its flexibility and convenience. At the same time, cellular networks can provide UAVs with important features such as wide coverage, high reliability, high security, and continuous mobility, as well as supervision for regulators. The communication environment of UAVs is quite different from that of ordinary terminal devices. UAVs mainly fly above base stations and connect to base stations through Uu ports. Line of sight (LOS) communication is the main method, so UAVs can receive signals from more base stations.

[0003] The 3rd generation partnership project (3GPP) R16 introduced conditional handover (CHO), which is an enhancement of the basic handover of the new radio (NR). In the CHO scenario, when the drone communicates during flight, how does the source base station configure the message reporting restriction information? Summary of the invention

[0004] The embodiments of the present application provide a communication method and device that can meet the restrictions of different network devices on sending mobile path update indication messages to terminal devices, thereby improving the flexibility of communication.

[0005] In a first aspect, an embodiment of the present application provides a communication method, which is applied to a first network device, or a chip or circuit configured in the first network device, including:

[0006] A first message is sent to a second network device, wherein the first message includes movement path information of a terminal device; and a second message is received from the second network device, wherein the second message includes waypoint deviation tolerance information, wherein the waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the movement path corresponding to the movement path information.

[0007] In view of the different tolerance levels of waypoint deviations of mobile paths by different second network devices, the first network device obtains the waypoint deviation tolerance information of different second network devices, determines the message reporting restriction information and sends it to the terminal device, thereby meeting the restrictions of different second network devices on mobile path update indication messages and improving the flexibility of communication.

[0008] In a possible design, the waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint is a waypoint in the moving path, and the first distance threshold is a distance threshold of the terminal device deviating from the first waypoint. For each waypoint in the moving path, the second network device can configure a first distance threshold.

[0009] In one possible design, the waypoint deviation tolerance information includes a second distance threshold, which is a distance threshold for the terminal device to deviate from any waypoint in the moving path. The second network device configures one or more second distance thresholds for the moving path of the terminal device.

[0010] In a possible design, based on the waypoint deviation tolerance information, message reporting restriction information is determined; the message reporting restriction information is sent to the terminal device, and the message reporting restriction information is used to restrict the terminal device from sending a mobile path update indication message. By obtaining the waypoint deviation tolerance information of different second network devices, determining the message reporting restriction information and sending it to the terminal device, the restrictions of different second network devices on the mobile path update indication message are met, thereby improving the flexibility of communication.

[0011] In a possible design, based on the waypoint deviation tolerance information, determining the message reporting restriction condition information includes: selecting one with the smallest waypoint deviation tolerance from the received multiple waypoint deviation tolerance information as the message reporting restriction condition information. By selecting the smallest waypoint deviation tolerance as the message reporting restriction condition information, the message reporting restriction condition information satisfies the restrictions of different second network devices on the mobile path update indication message.

[0012] In a possible design, the second message also includes first indication information, and the first indication information is used to indicate whether the second network device supports providing services for the terminal device. In the CHO scenario, the first network device sends mobile path information to the second network device, and the second network device determines whether its coverage range supports providing services for the terminal device. The first network device determines the target candidate network device for conditional switching based on the feedback from the second network device on whether it supports providing services for the terminal device, and avoids sending CHO configurations and CHO switching conditions of network devices that do not support providing services for the terminal device to the terminal device, thereby reducing signaling overhead and improving communication efficiency.

[0013] In one possible design, the second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the mobile path that is within the coverage of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage of the second network device is between the at least two waypoints. By indicating the waypoints within the coverage of the second network device, or the coverage is between at least two waypoints, the first network device can determine that the second network device supports providing services for the terminal device. And the first network device determines the CHO switching condition of the candidate target network device based on the information contained in the second message.

[0014] In one possible design, the first network device selects a candidate target network device for conditional switching CHO from at least one of the second network devices based on the second message. By selecting a candidate target network device for conditional switching CHO from at least one of the second network devices, it is avoided to send a CHO configuration and a CHO switching condition of a network device that does not support providing services to the terminal device to the terminal device, thereby reducing signaling overhead and improving communication efficiency.

[0015] In a possible design, the CHO configuration and CHO triggering condition of the candidate target network device are sent to the terminal device. By sending the CHO configuration and CHO triggering condition of the candidate target network device to the terminal device, the terminal device completes the conditional switching during the movement process, thereby ensuring the success rate of the conditional switching.

[0016] In one possible design, the CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint for entering the coverage of the candidate target network device, and the third waypoint is a waypoint for leaving the coverage of the candidate target network device. When the RSRP threshold and the location range of the candidate target network device are met at the same time, the terminal device switches from the cell of the first network device to the cell of the candidate target network device to ensure the success rate of the conditional switching.

[0017] In a possible design, the CHO trigger condition includes a time range, the time range includes a first time point and a first duration, the first time point is the time point of entering the coverage of the candidate target network device, and the first duration is the duration of entering the coverage of the candidate target network device. When the RSRP threshold and the time range of the candidate target network device are met at the same time, the terminal device switches from the cell of the first network device to the cell of the candidate target network device to ensure the success rate of the conditional switching.

[0018] In a second aspect, an embodiment of the present application provides a communication method, which is applied to a second network device, or a chip or circuit configured in the second network device, including:

[0019] Receiving a first message from a first network device, wherein the first message includes moving path information of a terminal device;

[0020] A second message is sent to the first network device, wherein the second message includes first waypoint deviation tolerance information, and the first waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

[0021] In view of the different tolerance levels of waypoint deviations of mobile paths by different second network devices, the first network device obtains the waypoint deviation tolerance information of different second network devices, determines the message reporting restriction information and sends it to the terminal device, thereby meeting the restrictions of different second network devices on mobile path update indication messages and improving the flexibility of communication.

[0022] In one possible design, the first waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint is a waypoint in the moving path, and the first distance threshold is a distance away from the first waypoint. For each waypoint in the moving path, the second network device can configure a first distance threshold.

[0023] In one possible design, the first waypoint deviation tolerance information includes a second distance threshold, and the second distance threshold is the distance that the terminal device deviates from any waypoint in the moving path. For the moving path of the terminal device, the second network device configures one or more second distance thresholds.

[0024] In a possible design, the second message also includes first indication information, and the first indication information is used to indicate whether the second network device supports providing services for the terminal device. In the CHO scenario, the first network device sends mobile path information to the second network device, and the second network device determines whether its coverage range supports providing services for the terminal device. The first network device determines the target candidate network device for conditional switching based on the feedback from the second network device on whether it supports providing services for the terminal device, and avoids sending CHO configurations and CHO switching conditions of network devices that do not support providing services for the terminal device to the terminal device, thereby reducing signaling overhead and improving communication efficiency.

[0025] In one possible design, the second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the mobile path that is within the coverage of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage of the second network device is between the at least two waypoints. By indicating the waypoints within the coverage of the second network device, or the coverage is between at least two waypoints, the first network device can determine that the second network device supports providing services for the terminal device. And the first network device determines the CHO switching condition of the candidate target network device based on the information contained in the second message.

[0026] In one possible design, a third message is sent to a third network device, the third message including the moving path information; a fourth message is received from the third network device, the fourth message including second waypoint deviation tolerance information, the second waypoint deviation tolerance information is used to indicate the distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information. In a multi-hop scenario, the waypoint deviation tolerance information of more network devices is obtained through the second network device.

[0027] In one possible design, a fifth message is sent to the first network device, the fifth message including the second waypoint deviation tolerance information. By obtaining waypoint deviation tolerance information of more different network devices, the accuracy of determining the message reporting restriction condition information is improved.

[0028] In a third aspect, an embodiment of the present application provides a communication method, which is applied to a terminal device, or a chip or circuit configured in the terminal device, including:

[0029] Receive message reporting restriction condition information from a first network device, wherein the message reporting restriction condition information is determined based on waypoint deviation tolerance information, and the waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information; when the moving state of the terminal device satisfies the message reporting restriction condition information, send a moving path update indication message.

[0030] In view of the different tolerances of different second network devices for waypoint deviations of the moving path, the first network device determines the message reporting restriction information by obtaining the waypoint deviation tolerance information of different second network devices. When the message reporting restriction information is met, the terminal device sends the moving path update indication message, thereby meeting the restrictions of different second network devices on the moving path update indication message and improving the flexibility of communication.

[0031] In one possible design, a conditional switching CHO configuration and a CHO triggering condition of a candidate target network device from the first network device are received, and the candidate target network device is a second network device that supports providing services to the terminal device; based on the CHO configuration and the CHO triggering condition, conditional switching is performed. By receiving the CHO configuration and the CHO triggering condition of the candidate target network device, the terminal device completes the conditional switching during the movement process, thereby ensuring the success rate of the conditional switching.

[0032] In one possible design, the CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint entering the coverage range of the candidate target network device, and the third waypoint is a waypoint leaving the coverage range of the candidate target network device;

[0033] When the terminal device passes through the second waypoint and enters the coverage of the candidate target network device, and the signal quality of the candidate target network device measured by the terminal device meets the first threshold, the cell of the first network device is switched to the cell of the candidate target network device through the CHO configuration. When the RSRP threshold and the location range of the candidate target network device are met at the same time, the cell of the first network device is switched to the cell of the candidate target network device to ensure the success rate of conditional switching.

[0034] In a possible design, the CHO trigger condition includes a time range, the time range includes a first time point and a first duration, the first time point is a time point of entering the coverage range of the candidate target network, and the first duration is a duration of entering the coverage range of the candidate target network device;

[0035] When the terminal device enters the coverage of the candidate target network device at the first time point, and the signal quality of the candidate target network device measured within the first time period meets the first threshold, the cell of the first network device is switched to the cell of the candidate target network device through the CHO configuration. When the RSRP threshold and time range of the candidate target network device are met at the same time, the cell of the first network device is switched to the cell of the candidate target network device to ensure the success rate of conditional switching.

[0036] In a fourth aspect, an embodiment of the present application provides a communication method, which is applied to a first network device, or a chip or circuit configured in the first network device, including:

[0037] The first network device sends a first message to the second network device, where the first message includes moving path information of the terminal device;

[0038] The first network device receives a second message from the second network device, where the second message includes first indication information, and the first indication information is used to indicate whether the second network device supports providing services for the terminal device.

[0039] In the CHO scenario, the first network device sends the mobile path information to the second network device, and the second network device determines whether its coverage range supports providing services to the terminal device. The first network device determines the target candidate network device for conditional switching based on the feedback from the second network device on whether it supports providing services to the terminal device, avoiding sending the CHO configuration and CHO switching conditions of the network device that does not support providing services to the terminal device to the terminal device, thereby reducing signaling overhead and improving communication efficiency.

[0040] In one possible design, the second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the mobile path that is within the coverage of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage of the second network device is between the at least two waypoints. By indicating the waypoints within the coverage of the second network device, or the coverage is between at least two waypoints, the first network device can determine that the second network device supports providing services for the terminal device. And the first network device determines the CHO switching condition of the candidate target network device based on the information contained in the second message.

[0041] In one possible design, based on the second message, a candidate target network device for performing conditional switching CHO is selected from at least one of the second network devices. By selecting a candidate target network device for performing conditional switching CHO from at least one of the second network devices, it is avoided to send a CHO configuration and a CHO switching condition of a network device that does not support providing services to the terminal device to the terminal device, thereby reducing signaling overhead and improving communication efficiency.

[0042] In a possible design, the CHO configuration and CHO triggering condition of the candidate target network device are sent to the terminal device. By sending the CHO configuration and CHO triggering condition of the candidate target network device to the terminal device, the terminal device completes the conditional switching during the movement process, thereby ensuring the success rate of the conditional switching.

[0043] In one possible design, the CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint for entering the coverage of the candidate target network device, and the third waypoint is a waypoint for leaving the coverage of the candidate target network device. When the RSRP threshold and the location range of the candidate target network device are met at the same time, the terminal device switches from the cell of the first network device to the cell of the candidate target network device to ensure the success rate of the conditional switching.

[0044] In a possible design, the CHO trigger condition includes a time range, the time range includes a first time point and a first duration, the first time point is the time point of entering the coverage of the candidate target network device, and the first duration is the duration of entering the coverage of the candidate target network device. When the RSRP threshold and the time range of the candidate target network device are met at the same time, the terminal device switches from the cell of the first network device to the cell of the candidate target network device to ensure the success rate of the conditional switching.

[0045] In a possible design, the second message includes waypoint deviation tolerance information, and the waypoint deviation tolerance information is used to indicate the distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information. In view of the different waypoint deviation tolerances of different second network devices for the moving path, the first network device obtains the waypoint deviation tolerance information of different second network devices, determines the message reporting restriction condition information, and sends it to the terminal device, thereby satisfying the restrictions of different second network devices on the moving path update indication message, and improving the flexibility of communication.

[0046] In a possible design, the waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint is a waypoint in the moving path, and the first distance threshold is a distance threshold of the terminal device deviating from the first waypoint. For each waypoint in the moving path, the second network device can configure a first distance threshold.

[0047] In one possible design, the waypoint deviation tolerance information includes a second distance threshold, which is a distance threshold for the terminal device to deviate from any waypoint in the moving path. The second network device configures one or more second distance thresholds for the moving path of the terminal device.

[0048] In a possible design, the first network device determines message reporting restriction information based on the waypoint deviation tolerance information; sends the message reporting restriction information to the terminal device, and the message reporting restriction information is used to restrict the terminal device from sending a moving path update indication message. By obtaining the waypoint deviation tolerance information of different second network devices, determining the message reporting restriction information and sending it to the terminal device, the restrictions on the moving path update indication message of different second network devices are met, thereby improving the flexibility of communication.

[0049] In a possible design, one with the smallest waypoint deviation tolerance is selected from the received multiple waypoint deviation tolerance information as the message reporting restriction condition information. By selecting the smallest waypoint deviation tolerance as the message reporting restriction condition information, the message reporting restriction condition information satisfies the restrictions of different second network devices on the mobile path update indication message.

[0050] In a fifth aspect, an embodiment of the present application provides a communication method, which is applied to a second network device, or a chip or circuit configured in the second network device, including:

[0051] Receive a first message from a first network device, the first message including mobile path information of a terminal device; send a second message to the first network device, the second message including first indication information, the first indication information being used to indicate whether the second network device supports providing services for the terminal device.

[0052] In the CHO scenario, the first network device sends the mobile path information to the second network device, and the second network device determines whether its coverage range supports providing services to the terminal device. The first network device determines the target candidate network device for conditional switching based on the feedback from the second network device on whether it supports providing services to the terminal device, avoiding sending the CHO configuration and CHO switching conditions of the network device that does not support providing services to the terminal device to the terminal device, thereby reducing signaling overhead and improving communication efficiency.

[0053] In one possible design, the second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the mobile path that is within the coverage of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage of the second network device is between the at least two waypoints. By indicating the waypoints within the coverage of the second network device, or the coverage is between at least two waypoints, the first network device can determine that the second network device supports providing services for the terminal device. And the first network device determines the CHO switching condition of the candidate target network device based on the information contained in the second message.

[0054] In a possible design, the second message also includes first waypoint deviation tolerance information, and the first waypoint deviation tolerance information is used to indicate the distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information. In view of the different waypoint deviation tolerances of different second network devices for the moving path, the first network device obtains the waypoint deviation tolerance information of different second network devices, determines the message reporting restriction condition information, and sends it to the terminal device, thereby satisfying the restrictions of different second network devices on the moving path update indication message, and improving the flexibility of communication.

[0055] In one possible design, the first waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint is a waypoint in the moving path, and the first distance threshold is a distance away from the first waypoint. For each waypoint in the moving path, the second network device can configure a first distance threshold.

[0056] In one possible design, the first waypoint deviation tolerance information includes a second distance threshold, and the second distance threshold is the distance that the terminal device deviates from any waypoint in the moving path. For the moving path of the terminal device, the second network device configures one or more second distance thresholds.

[0057] In one possible design, a third message is sent to a third network device, the third message including the mobile path information; a fourth message is received from the third network device, the fourth message including third indication information, the third indication information being used to indicate whether the third network device supports providing services for the terminal device. In a multi-hop scenario, whether more network devices support providing services for the terminal device is obtained through the second network device.

[0058] In one possible design, a fifth message is sent to the first network device, and the fifth message includes the third indication information. By obtaining whether more different network devices support providing services for the terminal device, the success rate of the terminal device performing conditional switching during the movement process is improved.

[0059] In a sixth aspect, an embodiment of the present application provides a communication method, which is applied to a terminal device, or a chip or circuit configured in the terminal device, including:

[0060] Receive a conditional switching CHO configuration and a CHO trigger condition of a candidate target network device from the first network device, where the candidate target network device is a second network device that supports providing services for the terminal device; and perform conditional switching based on the CHO configuration and the CHO trigger condition.

[0061] By receiving the CHO configuration and CHO triggering condition of the candidate target network device that supports providing services to the terminal device, the success rate of the conditional switching is guaranteed.

[0062] In one possible design, the CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint entering the coverage range of the candidate target network device, and the third waypoint is a waypoint leaving the coverage range of the candidate target network device;

[0063] When the terminal device passes through the second waypoint and enters the coverage of the candidate target network device, and the signal quality of the candidate target network device measured by the terminal device meets the first threshold, the cell of the first network device is switched to the cell of the candidate target network device through the CHO configuration. When the RSRP threshold and the location range of the candidate target network device are met at the same time, the cell of the first network device is switched to the cell of the candidate target network device to ensure the success rate of conditional switching.

[0064] In a possible design, the CHO trigger condition includes a time range, the time range includes a first time point and a first duration, the first time point is a time point of entering the coverage range of the candidate target network, and the first duration is a duration of entering the coverage range of the candidate target network device;

[0065] When the terminal device enters the coverage of the candidate target network device at the first time point, and the signal quality of the candidate target network device measured within the first time period meets the first threshold, the cell of the first network device is switched to the cell of the candidate target network device through the CHO configuration. When the RSRP threshold and time range of the candidate target network device are met at the same time, the cell of the first network device is switched to the cell of the candidate target network device to ensure the success rate of conditional switching.

[0066] In one possible design, the terminal device receives message reporting restriction condition information from the first network device, and the message reporting restriction condition information is determined based on waypoint deviation tolerance information, and the waypoint deviation tolerance information is used to indicate the distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information; when the moving state of the terminal device satisfies the message reporting restriction condition information, a moving path update indication message is sent.

[0067] In view of the different tolerances of different second network devices for waypoint deviations of the moving path, the first network device determines the message reporting restriction information by obtaining the waypoint deviation tolerance information of different second network devices. When the message reporting restriction information is met, the terminal device sends the moving path update indication message, thereby meeting the restrictions of different second network devices on the moving path update indication message and improving the flexibility of communication.

[0068] In a seventh aspect, an embodiment of the present application provides a communication device, the communication device comprising:

[0069] A sending module, configured to send a first message to a second network device, wherein the first message includes moving path information of the terminal device;

[0070] A receiving module is used to receive a second message from the second network device, wherein the second message includes waypoint deviation tolerance information, and the waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

[0071] In one possible design, the waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint being a waypoint in the moving path, and the first distance threshold being a distance threshold of the terminal device deviating from the first waypoint.

[0072] In one possible design, the waypoint deviation tolerance information includes a second distance threshold, where the second distance threshold is a distance threshold at which the terminal device deviates from any waypoint in the moving path.

[0073] In one possible design, the processing module is used to determine message reporting restriction condition information based on the waypoint deviation tolerance information;

[0074] A sending module is used to send the message reporting restriction condition information to the terminal device, and the message reporting restriction condition information is used to restrict the terminal device from sending a mobile path update indication message.

[0075] In one possible design, the processing module is used to select the one with the smallest waypoint deviation tolerance from the multiple waypoint deviation tolerance information received as the message reporting restriction condition information.

[0076] In one possible design, the second message also includes first indication information, and the first indication information is used to indicate whether the second network device supports providing services for the terminal device.

[0077] In one possible design, the second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the moving path that is within the coverage range of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage range of the second network device is between the at least two waypoints.

[0078] In one possible design, a processing module is used to select a candidate target network device for performing conditional switching CHO from at least one of the second network devices based on the second message.

[0079] In one possible design, the sending module is used to send the CHO configuration and CHO triggering condition of the candidate target network device to the terminal device.

[0080] In one possible design, the CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint entering the coverage range of the candidate target network device, and the third waypoint is a waypoint leaving the coverage range of the candidate target network device.

[0081] In one possible design, the CHO trigger condition includes a time range, and the time range includes a first time point and a first duration, the first time point is the time point of entering the coverage range of the candidate target network device, and the first duration is the duration of entering the coverage range of the candidate target network device.

[0082] The operations and beneficial effects performed by the communication device can refer to the method and beneficial effects described in the first aspect above, and the repeated parts will not be repeated.

[0083] In an eighth aspect, an embodiment of the present application provides a communication device, the communication device comprising:

[0084] A receiving module, configured to receive a first message from a first network device, wherein the first message includes moving path information of a terminal device;

[0085] A sending module is used to send a second message to the first network device, wherein the second message includes first waypoint deviation tolerance information, and the first waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

[0086] In one possible design, the first waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint is a waypoint in the moving path, and the first distance threshold is a distance away from the first waypoint.

[0087] In one possible design, the first waypoint deviation tolerance information includes a second distance threshold, where the second distance threshold is the distance that the terminal device deviates from any waypoint in the moving path.

[0088] In one possible design, the second message also includes first indication information, and the first indication information is used to indicate whether the second network device supports providing services for the terminal device.

[0089] In one possible design, the second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the moving path that is within the coverage range of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage range of the second network device is between the at least two waypoints.

[0090] In one possible design, the sending module is also used to send a third message to a third network device, and the third message includes the moving path information; the receiving module is also used to receive a fourth message from the third network device, and the fourth message includes second waypoint deviation tolerance information, and the second waypoint deviation tolerance information is used to indicate the distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

[0091] In one possible design, the sending module is also used to send a fifth message to the first network device, and the fifth message includes the deviation tolerance information of the second waypoint.

[0092] The operations and beneficial effects performed by the communication device can refer to the method and beneficial effects described in the second aspect above, and the repeated parts will not be repeated.

[0093] In a ninth aspect, an embodiment of the present application provides a communication device, the communication device comprising:

[0094] A receiving module, configured to receive message reporting restriction information from a first network device, wherein the message reporting restriction information is determined based on waypoint deviation tolerance information, wherein the waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information;

[0095] A sending module is used to send a moving path update indication message when the moving state of the terminal device meets the message reporting restriction condition information.

[0096] In one possible design, the receiving module is used to receive a conditional switching CHO configuration and a CHO triggering condition of a candidate target network device from the first network device, where the candidate target network device is a second network device that supports providing services for the terminal device;

[0097] A processing module is used to perform conditional switching based on the CHO configuration and the CHO triggering condition.

[0098] In one possible design, the CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint entering the coverage range of the candidate target network device, and the third waypoint is a waypoint leaving the coverage range of the candidate target network device;

[0099] A processing module is used to switch from the cell of the first network device to the cell of the candidate target network device through the CHO configuration when the terminal device passes through the second waypoint and enters the coverage of the candidate target network device and the signal quality of the candidate target network device measured by the terminal device meets the first threshold.

[0100] In a possible design, the CHO trigger condition includes a time range, the time range includes a first time point and a first duration, the first time point is a time point of entering the coverage range of the candidate target network, and the first duration is a duration of entering the coverage range of the candidate target network device;

[0101] A processing module is used to switch from the cell of the first network device to the cell of the candidate target network device through the CHO configuration when the terminal device enters the coverage of the candidate target network device at the first time point and the signal quality of the candidate target network device measured within the first time period meets the first threshold.

[0102] The operations and beneficial effects performed by the communication device can refer to the method and beneficial effects described in the third aspect above, and the repeated parts will not be repeated.

[0103] In a tenth aspect, an embodiment of the present application provides a communication device, the communication device comprising:

[0104] A sending module, configured to send a first message to a second network device, wherein the first message includes moving path information of the terminal device;

[0105] A receiving module is used to receive a second message from the second network device, where the second message includes first indication information, and the first indication information is used to indicate whether the second network device supports providing services for the terminal device.

[0106] In one possible design, the second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the moving path that is within the coverage range of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage range of the second network device is between the at least two waypoints.

[0107] In one possible design, a processing module is used to select a candidate target network device for performing conditional switching CHO from at least one of the second network devices based on the second message.

[0108] In one possible design, the sending module is used to send the CHO configuration and CHO triggering condition of the candidate target network device to the terminal device.

[0109] In one possible design, the CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint entering the coverage range of the candidate target network device, and the third waypoint is a waypoint leaving the coverage range of the candidate target network device.

[0110] In one possible design, the CHO trigger condition includes a time range, and the time range includes a first time point and a first duration, the first time point is the time point of entering the coverage range of the candidate target network device, and the first duration is the duration of entering the coverage range of the candidate target network device.

[0111] In one possible design, the second message includes waypoint deviation tolerance information, and the waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

[0112] In one possible design, the waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint being a waypoint in the moving path, and the first distance threshold being a distance threshold of the terminal device deviating from the first waypoint.

[0113] In one possible design, the waypoint deviation tolerance information includes a second distance threshold, where the second distance threshold is a distance threshold at which the terminal device deviates from any waypoint in the moving path.

[0114] In one possible design, the processing module is used to determine message reporting restriction condition information based on the waypoint deviation tolerance information;

[0115] A sending module is used to send the message reporting restriction condition information to the terminal device, and the message reporting restriction condition information is used to restrict the terminal device from sending a mobile path update indication message.

[0116] In one possible design, the processing module is used to select the one with the smallest waypoint deviation tolerance from the multiple waypoint deviation tolerance information received as the message reporting restriction condition information.

[0117] The operations and beneficial effects performed by the communication device can refer to the method and beneficial effects described in the fourth aspect above, and the repeated parts will not be repeated.

[0118] In an eleventh aspect, an embodiment of the present application provides a communication device, the communication device comprising:

[0119] A receiving module, configured to receive a first message from a first network device, wherein the first message includes moving path information of a terminal device;

[0120] A sending module is used to send a second message to the first network device, where the second message includes first indication information, and the first indication information is used to indicate whether the second network device supports providing services for the terminal device.

[0121] In one possible design, the second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the moving path that is within the coverage range of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage range of the second network device is between the at least two waypoints.

[0122] In one possible design, the second message also includes first waypoint deviation tolerance information, where the first waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

[0123] In one possible design, the first waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint is a waypoint in the moving path, and the first distance threshold is a distance away from the first waypoint.

[0124] In one possible design, the first waypoint deviation tolerance information includes a second distance threshold, where the second distance threshold is the distance that the terminal device deviates from any waypoint in the moving path.

[0125] In one possible design, the sending module is used to send a third message to a third network device, where the third message includes the moving path information;

[0126] A receiving module is used to receive a fourth message from the third network device, where the fourth message includes third indication information, and the third indication information is used to indicate whether the third network device supports providing services for the terminal device.

[0127] In one possible design, a sending module is used to send a fifth message to the first network device, and the fifth message includes the third indication information.

[0128] The operations and beneficial effects performed by the communication device can refer to the method and beneficial effects described in the fifth aspect above, and the repeated parts will not be repeated.

[0129] In a twelfth aspect, an embodiment of the present application provides a communication device, the communication device comprising:

[0130] A receiving module, configured to receive a conditional handover CHO configuration and a CHO triggering condition of a candidate target network device from a first network device, wherein the candidate target network device is a second network device that supports providing services for the terminal device;

[0131] A processing module is used to perform conditional switching based on the CHO configuration and the CHO triggering condition.

[0132] In one possible design, the CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint entering the coverage range of the candidate target network device, and the third waypoint is a waypoint leaving the coverage range of the candidate target network device;

[0133] A processing module is used to switch from the cell of the first network device to the cell of the candidate target network device through the CHO configuration when the terminal device passes through the second waypoint and enters the coverage of the candidate target network device and the signal quality of the candidate target network device measured by the terminal device meets the first threshold.

[0134] In a possible design, the CHO trigger condition includes a time range, the time range includes a first time point and a first duration, the first time point is a time point of entering the coverage range of the candidate target network, and the first duration is a duration of entering the coverage range of the candidate target network device;

[0135] A processing module is used to switch from the cell of the first network device to the cell of the candidate target network device through the CHO configuration when the terminal device enters the coverage of the candidate target network device at the first time point and the signal quality of the candidate target network device measured within the first time period meets the first threshold.

[0136] In one possible design, a receiving module is used to receive message reporting restriction condition information from the first network device, where the message reporting restriction condition information is determined based on waypoint deviation tolerance information, where the waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information;

[0137] A sending module is used to send a moving path update indication message when the moving state of the terminal device meets the message reporting restriction condition information.

[0138] The operations and beneficial effects performed by the communication device can refer to the method and beneficial effects described in the sixth aspect above, and the repeated parts will not be repeated.

[0139] In the thirteenth aspect, the present application provides a communication device, which includes a processor and a memory, the memory being used to store a computer program; the processor being used to execute the computer program stored in the memory so that the communication device performs a method as described in any one of the first and fourth aspects.

[0140] In a fourteenth aspect, the present application provides a communication device, comprising a processor and a memory, wherein the memory is used to store a computer program; the processor is used to execute the computer program stored in the memory so that the communication device performs a method as described in any one of the second and fifth aspects.

[0141] In the fifteenth aspect, the present application provides a communication device, which includes a processor and a memory, the memory being used to store a computer program; the processor being used to execute the computer program stored in the memory so that the communication device performs a method as described in any one of the third aspect and the sixth aspect.

[0142] In the sixteenth aspect, the present application provides a communication device, which may be a first network device, or a device in the first network device, or a device that can be used in combination with the first network device. Among them, the communication device may also be a chip system. The communication device may execute the methods described in the first and fourth aspects. The functions of the communication device may be implemented by hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules corresponding to the above functions. The module may be software and / or hardware. The operations and beneficial effects performed by the communication device may refer to the methods and beneficial effects described in the first and fourth aspects above, and the repetitive parts will not be repeated.

[0143] In the seventeenth aspect, the present application provides a communication device, which may be a second network device, or a device in the second network device, or a device that can be used in combination with the second network device. Among them, the communication device may also be a chip system. The communication device may execute the methods described in the second and fifth aspects. The functions of the communication device may be implemented by hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules corresponding to the above functions. The module may be software and / or hardware. The operations and beneficial effects performed by the communication device may refer to the methods and beneficial effects described in the second and fifth aspects above, and the repetitive parts will not be repeated.

[0144] In the eighteenth aspect, the present application provides a communication device, which may be a terminal device, or a device in a terminal device, or a device that can be used in combination with a terminal device. Among them, the communication device may also be a chip system. The communication device may execute the methods described in the first aspect, the third aspect, and the sixth aspect. The functions of the communication device may be implemented by hardware, or by hardware executing corresponding software implementations. The hardware or software includes one or more modules corresponding to the above functions. The module may be software and / or hardware. The operations and beneficial effects performed by the communication device may refer to the methods and beneficial effects described in the third aspect and the sixth aspect above, and the repetitive parts will not be repeated.

[0145] In the nineteenth aspect, the present application provides a computer-readable storage medium for storing a computer program. When the computer program is executed, the method described in any one of the first to sixth aspects is implemented.

[0146] In the twentieth aspect, the present application provides a computer program product comprising a computer program, which, when executed, enables the method described in any one of the first to sixth aspects to be implemented.

[0147] In the twenty-first aspect, an embodiment of the present application provides a communication system, which includes at least one terminal device and at least one network device, the terminal device is used to execute the steps in the above-mentioned third aspect and sixth aspect, and the network device is used to execute the steps in the above-mentioned first aspect, second aspect, fourth aspect and fifth aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0148] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0149] Figure 1 It is a schematic diagram of the architecture of a communication system provided by an embodiment of the present application;

[0150] Figure 2 is a schematic diagram of a communication interface;

[0151] Figure 3 It is a schematic diagram of a flight path;

[0152] Figure 4a This is a schematic diagram of a basic NR switch;

[0153] Figure 4b It is a schematic diagram of another basic switching of NR;

[0154] Figure 5 It is a schematic diagram of CHO switching;

[0155] Figure 6 It is a flow chart of a communication method provided in an embodiment of the present application;

[0156] Figure 7 is a schematic diagram of a waypoint provided in an embodiment of the present application;

[0157] Figure 8 is a schematic diagram of another waypoint provided in an embodiment of the present application;

[0158] Fig. 9 It is a flow chart of a communication method provided in an embodiment of the present application;

[0159] Fig.10 is a structural diagram of a communication device provided in an embodiment of the present application;

[0160] Fig.11 is a structural diagram of another communication device provided in an embodiment of the present application;

[0161] Fig.12 It is a structural diagram of a network device provided in an embodiment of the present application;

[0162] Fig.13It is a structural diagram of a terminal device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0163] like Figure 1 As shown, Figure 1 It is a schematic diagram of the architecture of a communication system provided in an embodiment of the present application. The communication system may include a network device and a terminal device. Among them, the network device may include a source base station and a neighboring base station, the neighboring base station is a base station adjacent to the source base station, and the terminal device may be located within the coverage of one or more service cells provided by the network device. When there are multiple cells providing services for the terminal device, the terminal device may operate in accordance with carrier aggregation (CA), dual connectivity (DC) or coordinated multi-point transmission mode, wherein one or more service cells provide at least one parameter set (numerology) and provide wireless resources for the terminal device at the same time.

[0164] The terminal device can be called user equipment (UE), mobile station (MS), mobile terminal (MT), etc., which refers to a device that provides voice and / or data connectivity to the user. For example, a handheld device with wireless connection function, a vehicle-mounted device, etc. At present, some examples of terminals are: mobile phones, tablet computers, laptops, PDAs, mobile Internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, wireless terminals in smart grids, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, etc. The following description takes the terminal device as a drone.

[0165] Network equipment refers to a radio access network (RAN) node (or device) that connects a terminal device to a wireless network, and can also be called a base station. At present, some examples of RAN nodes are: evolved Node B (gNB), transmission reception point (TRP), evolved Node B (eNB), radio network controller (RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (e.g., home evolved NodeB, or home Node B, HNB), base band unit (BBU), or wireless fidelity (Wifi) access point (AP). In addition, in a network structure, the access network equipment may include a centralized unit (CU) node, a distributed unit (DU) node, or a RAN device including a CU node and a DU node. Among them, the RAN equipment including CU nodes and DU nodes splits the protocol layer of eNB in ​​the long term evolution (LTE) system, puts some functions of the protocol layer under central control of the CU, and distributes the remaining part or all of the functions of the protocol layer in the DU, which is centrally controlled by the CU.

[0166] like Figure 2 As shown, Figure 2 It is a schematic diagram of a communication interface. The terminal device and the network device can communicate through the Uu port. The interface for interconnecting network devices is called the Xn interface. The Xn interface supports the exchange of signaling information between two network devices. From a logical point of view, the Xn interface is a point-to-point interface between two network devices. Even if there is no physical direct connection between the two network devices, a point-to-point logical interface is feasible.

[0167] The communication system can be applicable to a long term evolution (LTE) system, a universal mobile telecommunications system (UMTS) system, a code division multiple access (CDMA) system, a wireless local area network (WLAN) or a fifth generation mobile communication system (5G) or a next generation wireless communication system, etc.

[0168] like Figure 3 As shown, Figure 3 It is a schematic diagram of a flight path. When performing corresponding tasks, drones may fly along a fixed route, such as conducting power network inspections. This route can be called the flight path of the drone. In the new radio (NR), the protocol supports the reporting of the flight path of drones. The flight path of a drone can be represented by planned waypoint information (the location expected to be reached) and the corresponding timestamp (optional), where the maximum number of waypoints in the flight path is 20. In addition, the standard also supports the update of the drone's flight path, that is, when the flight path of the UAV changes, a flight path update indication message can be sent to the base station to notify the base station that the flight path has been updated. If the base station needs to update the flight path, it sends a flight path request message to the drone to request the drone to report the flight path.

[0169] In the traditional NR basic switching, the signal of the base station can be measured during the movement of the terminal device. If the signal quality of the target base station is measured to be better than that of the source base station, the cell covered by the source base station can be switched to the cell covered by the target base station. However, due to the deterioration of the wireless environment between the UE and the source base station, the UE's measurement report may not reach the base station. Figure 4a As shown in the figure, the source base station sends a measurement configuration to the UE, and the UE sends a measurement report to the source base station after measuring the signal. However, due to the deterioration of the wireless environment, the source base station cannot receive the measurement report reported by the UE. Alternatively, after the source base station receives the measurement report, the handover command sent to the UE cannot reach the UE. Figure 4b As shown in the figure, the source base station sends a handover request to the target base station, and then the target base station sends a handover request confirmation to the source base station. After receiving the handover request confirmation, the source base station sends a handover command to the UE. However, due to the deterioration of the wireless environment, the UE cannot receive the handover command sent by the target base station. In both cases, the handover will fail. At this time, the UE will recognize the failure of the wireless link and initiate the RRC reconstruction process.

[0170] In order to reduce the probability of NR basic switching, the 3rd generation partnership project (3GPP) R16 introduced CHO, which is an enhancement of NR basic switching. CHO can be understood as: before the wireless environment between the UE and the source base station further deteriorates, the source base station sends the switching command (carrying the CHO configuration of the candidate target base station and the CHO trigger condition) to the UE in advance, so that the UE knows how to access the target base station in advance. After the UE finds a base station that meets the CHO trigger condition among the candidate target base stations, it can decide to initiate the switching independently, which increases the chance of successful message transmission and can greatly improve the success rate of the switching. Figure 5 As shown, Figure 5 This is a schematic diagram of CHO switching. The CHO process is as follows:

[0171] S501, access and mobility management function (AMF) provides mobility control information.

[0172] S502, the UE interacts with the source base station for measurement control and reporting.

[0173] S503: The source base station decides to use CHO.

[0174] S504, the source base station sends a CHO request message (handover request) to multiple target base stations, wherein the request message is used to request CHO of one or more candidate cells belonging to one or more target base stations, wherein the multiple target base stations include the target base station and other target base stations.

[0175] S505: Each target base station performs admission control.

[0176] S506, each target base station sends a handover request acknowledgement message to the source base station. The handover request acknowledgement message includes the CHO configuration of the candidate cell. The handover request acknowledgement message is a CHO response message sent by each target base station.

[0177] S507, the source base station sends an RRC reconfiguration message to the UE, wherein the RRC reconfiguration message includes the CHO configuration of the candidate cell and the CHO execution condition.

[0178] S508, the UE sends an RRC reconfiguration completion message to the source base station, where the RRC reconfiguration completion message is used to indicate that the RRC reconfiguration is completed.

[0179] S509: The UE evaluates the CHO execution condition of the candidate cell.

[0180] S510, if there is at least one candidate cell that meets the CHO execution condition, the UE detaches from the source gNB, synchronizes to the candidate cell of the target base station, and applies the stored corresponding CHO configuration for the selected candidate cell.

[0181] S511, the UE sends an RRC reconfiguration complete message to the target base station to complete the RRC handover process. Optionally, after the RRC handover process is successfully completed, the UE may release the stored CHO configuration.

[0182] S512: The target base station sends a handover success message to the source base station.

[0183] S513, the source base station sends a sequence number (SN) state transfer to the target base station.

[0184] S514: The source base station sends a handover cancel message to other target base stations, where the handover cancel message is used to cancel the CHO of the UE.

[0185] The current standard sets restrictions on drones reporting flight path update indication messages. For example, a drone is allowed to send a flight path update indication message only if it deviates from the scheduled waypoint by more than 50m, or arrives at the scheduled waypoint more than 10 minutes late. However, in the existing CHO, it does not consider how the source base station configures the restrictions on the flight path update indication message when different base stations have different tolerances for waypoint deviations. In addition, in the conditional switching scenario, since the source base station does not know the coverage range of the neighboring base stations, it is impossible to determine the candidate target base stations based on the drone's flight path, so that the drone can select the target base station from the candidate target base stations to complete the CHO.

[0186] In order to solve the above technical problems, the embodiments of the present application provide, for example, the following solutions.

[0187] See also Figure 6 , Figure 6 It is a flow chart of a communication method provided by an embodiment of the present application. In the embodiment of the present application, the first network device may be a source base station, the second network device may be one or more neighboring base stations (adjacent to the source base station), and the terminal device may be a drone. The method includes but is not limited to the following steps:

[0188] S601, a first network device sends a first message to a second network device, where the first message includes moving path information of a terminal device.

[0189] The first message may be a handover request message. The mobile path information is used to indicate a mobile path (also referred to as a flight path). The mobile path may include one or more waypoints. The mobile path information may include location information of one or more waypoints that the terminal device is expected to arrive at. The mobile path information may also include a time stamp corresponding to the expected arrival at the one or more waypoints. The mobile path information may also include location information of one or more waypoints that the terminal device is expected to arrive at, and a time stamp corresponding to the expected arrival at the one or more waypoints.

[0190] Optionally, before the first network device sends the first message to the second network device, the first network device may send measurement control information to the terminal device, wherein the measurement control information includes a reference signal receiving quality (RSRP) threshold. The terminal device measures other network devices adjacent to the first network device according to the measurement control information to obtain a measurement report, and sends the measurement report to the first network device. The measurement report may include the measured RSRP of other network devices.

[0191] Optionally, before the first network device sends the first message to the second network device, the terminal device may report the moving path information to the first network device.

[0192] S602, the second network device sends a second message to the first network device, where the second message includes waypoint deviation tolerance information, where the waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

[0193] Specifically, the second network device may determine the waypoint deviation tolerance information for the waypoints in the moving path of the terminal device based on the coverage range and moving path information of the second network device. Then, a second message is sent to the first network device, where the second message includes the waypoint deviation tolerance information. For example, for waypoints within the coverage range of the second network device, the second network device may allow the terminal device to deviate from the moving path by a distance greater than or equal to 0. For waypoints outside the coverage range of the second network device, the second network device allows the terminal device to deviate from the moving path by a distance equal to 0 or infinity. The waypoint deviation tolerance information may include the following situations:

[0194] In one implementation, the waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint being a waypoint in the moving path, and the first distance threshold being a distance threshold of the terminal device deviating from the first waypoint. It can be understood that, for each waypoint in the moving path, the second network device can configure a first distance threshold. Optionally, the first waypoint is a waypoint in the moving path that is within the coverage of the second network device. It can be understood that, for waypoints in the moving path that are within the coverage of the second network device, the first distance threshold can be configured, while for waypoints in the moving path that are outside the coverage of the second network device, the first distance threshold does not need to be configured. It should be noted that for waypoints that are not configured with the first distance threshold, it means that the second network device is not interested in the waypoint, that is, no matter how far the terminal device deviates from the waypoint during the actual movement, it will not trigger the reporting of the moving path update indication information.

[0195] In another implementation, the waypoint deviation tolerance information includes a second distance threshold, which is a distance threshold of the terminal device deviating from any waypoint in the moving path. It can be understood that the second network device configures one or more second distance thresholds for the moving path of the terminal device.

[0196] Optionally, the second message also includes first indication information, and the first indication information is used to indicate whether the second network device supports providing services for the terminal device. Specifically, the second network device can determine whether the second network device supports providing services for the terminal device based on the coverage and mobile path information of the second network device. For example, if any waypoint in the mobile path is outside the coverage of the second network device, it is determined that the second network device does not support providing services for the terminal device. If there are one or more waypoints in the mobile path that are within the coverage of the second network device, it is determined that the second network device supports providing services for the terminal device. After the second network device determines whether the second network device supports providing services for the terminal device, it sends a second message to the first network device, and the second message includes the first indication information. Among them, the first indication information can be represented by one or more bits. For example, 1 bit is used to represent it, where 1 indicates that the second network device supports providing services for the terminal device, and 0 indicates that the second network device does not support providing services for the terminal device. 0 and 1 can also be indicated in reverse.

[0197] In the embodiment of the present application, if the second network device supports providing services for the terminal device, the second network device may include the following information in the second message of the reply:

[0198] In one implementation, the second message further includes at least one waypoint, and the at least one waypoint is a waypoint in the mobile path that is within the coverage of the second network device. The waypoints within the coverage of the second network device may include one or more waypoints. Figure 7 As shown, Figure 7 It is a schematic diagram of a waypoint. The moving path includes waypoints such as waypoint 1 to waypoint 5, wherein waypoint 3 is within the coverage range of the base station, and waypoint 4 is within the coverage range of base station 2. It can be seen that both base station 1 and base station 2 support providing services to terminal devices. The waypoints within the coverage range of the second network device can also be a range, represented by waypoints entering the coverage range of the second network device and waypoints leaving the coverage range of the second network device. For example, the waypoints within the coverage range of the second network device include waypoint 2 and waypoint 5, wherein waypoint 2 is a waypoint entering the coverage range of the second network device, and waypoint 5 is a waypoint leaving the coverage range of the second network device. If multiple discontinuous waypoints appear within the coverage range of the second network device, the multiple waypoints can be represented in segments. For example, waypoint 2-waypoint 5, waypoint 7, and waypoint 10-waypoint 12. Optionally, multiple waypoints can also be represented in the order of entering the coverage range of the second network device. For example, waypoints 2 to 5 represent the first entry into the coverage of the second network device, waypoint 7 represents the second entry into the coverage of the second network device, and waypoints 10 to 12 represent the third entry into the coverage of the second network device.

[0199] In another implementation, the second message further includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage range of the second network device is located between the at least two waypoints. Figure 8 As shown, Figure 8 This is a schematic diagram of another waypoint. The moving path includes waypoints such as waypoint 1 to waypoint 5. The coverage of base station 1 is between waypoint 2 and waypoint 3, and the coverage of base station 2 is between waypoint 3 and waypoint 4. It can be seen that base station 1 and base station 2 both support providing services for terminal devices.

[0200] Optionally, if the second network device does not support providing services to the terminal device (for example, it is determined that all waypoints in the moving path are outside the coverage of the second network device), the second network device may send a handover preparation failure message to the first network device. Optionally, if the second network device does not support providing services to the terminal device, the second network device may not send any message to the first network device. In the case where the first network device does not receive any message returned by the second network device after sending a first message to the second network device, the first network device may determine that the second network device does not support providing services to the terminal device.

[0201] The second message may be a handover request acknowledgement message. The handover request acknowledgement message may include a CHO configuration of the second network device. The CHO configuration may include a cell identifier (ID), a cell-radio network temporary identifier (C-RNTI), a security algorithm ID, a key, etc. of the second network device.

[0202] The embodiment of the present application can also be applied to a multi-hop scenario, and the multi-hop scenario is introduced below:

[0203] The waypoint deviation tolerance information includes first waypoint deviation tolerance information and second waypoint deviation tolerance information. The first waypoint deviation tolerance information is the distance range that the coverage of the second network device allows the terminal device to deviate from the moving path corresponding to the moving path information. The second waypoint deviation tolerance information is used to indicate the distance range that the coverage of the third network device allows the terminal device to deviate from the moving path corresponding to the moving path information. The second network device is adjacent to the third network device.

[0204] After receiving the first message, the second network device may send a third message to the third network device, wherein the third message includes the moving path information. After receiving the third message, the third network device may determine the second waypoint deviation tolerance information for the waypoints in the moving path of the terminal device based on the coverage range and moving path information of the third network device, in the same manner as the second network device previously determined the first waypoint deviation tolerance information, which will not be repeated here. Then, the third network device sends a fourth message to the second network device, wherein the fourth message includes the second waypoint deviation tolerance information. Among them, the third message may be a switching request message, and the fourth message is a switching request confirmation message.

[0205] After receiving the second waypoint deviation tolerance information, the second network device may send a fifth message to the first network device, and the fifth message includes the second waypoint deviation tolerance information. That is, after determining the first waypoint deviation tolerance information, the second network device may first send the first waypoint deviation tolerance information to the first network device through the first message. After receiving the second waypoint deviation tolerance information, the second waypoint deviation tolerance information is sent to the first network device through the fifth message. Among them, the fifth message may be a switching request confirmation message. Alternatively, after receiving the second waypoint deviation tolerance information, the second network device sends the first waypoint deviation tolerance information and the second waypoint deviation tolerance information to the first network device through the first message. That is, after determining the first waypoint deviation tolerance information, the second network device waits to receive the second waypoint deviation tolerance information, and finally sends the first waypoint deviation tolerance information and the second waypoint deviation tolerance information together to the first network device.

[0206] Further optionally, if the last waypoint in the moving path is within the coverage of the third network device, the third network device no longer sends a switching request message to other network devices adjacent to it, otherwise it continues to send a switching request message.

[0207] S603, the first network device sends a message reporting restriction condition information to the terminal device, where the message reporting restriction condition information is used to restrict the terminal device from sending a moving path update indication message.

[0208] Specifically, after the first network device receives the second message sent by one or more second network devices, it can determine the message reporting restriction information based on the received one or more waypoint deviation tolerance information. Then, the message reporting restriction information is sent to the terminal device. Among them, the message reporting restriction information may include sending a mobile path update indication message when the deviation from the predetermined waypoint exceeds 20 meters, or sending a mobile path update indication message when arriving at the predetermined waypoint more than 10 minutes late or early. Alternatively, the message reporting restriction information may also include a distance threshold (e.g., 20 meters) or a time threshold (e.g., 10 minutes).

[0209] Furthermore, the first network device may select the one with the smallest waypoint deviation tolerance from the received multiple waypoint deviation tolerance information as the message reporting restriction information. Alternatively, the first network device may calculate the average of the waypoint deviation tolerance based on the received multiple waypoint deviation tolerance information, and use the calculated average of the waypoint deviation tolerance as the message reporting restriction information. Other methods may also be used to determine the reporting restriction information, which is not limited in this application.

[0210] The terminal device receives the message reporting restriction information from the first network device, and when the mobile state of the terminal device satisfies the message reporting restriction information, the terminal device sends a mobile path update indication message. The mobile state may include the location information of the terminal device during the actual movement, or the time point when the terminal device actually arrives at a certain waypoint.

[0211] For example, the mobile path includes the time when the drone is expected to arrive at waypoint 1 within the coverage of base station 1, but the drone actually arrives within the coverage of base station 1, and the distance offset from waypoint 1 is 25 meters. At this time, the message reporting restriction information is met, and the drone can send a mobile path update indication message to request to update the mobile path. For another example, the mobile path includes the time when the drone is expected to arrive at waypoint 2 within the coverage of base station 2 at 13:25, but the drone actually arrives at waypoint 2 within the coverage of base station 2 at 13:50, which is 25 minutes late. At this time, the message reporting restriction information is met, and the drone can send a mobile path update indication message to request to re-update the mobile path. Alternatively, a mobile path update indication message is sent when the terminal device deviates from the predetermined waypoint by more than 20 meters during actual movement, or arrives at the predetermined waypoint more than 10 minutes late or early.

[0212] Optionally, after the first network device receives the second message sent by one or more second network devices, it can also select a candidate target network device for executing conditional switching CHO from at least one of the second network devices based on the second message. Specifically, if the second message sent by the second network device includes first indication information, and the first indication information is used to indicate that the second network device supports providing services for the terminal device, the second network device is selected as one of the candidate target network devices. And / or, if the second message sent by the second network device includes at least one waypoint, and the at least one waypoint is a waypoint in the mobile path that is within the coverage range of the second network device, the second network device is selected as one of the candidate target network devices. And / or, if the second message sent by the second network device includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage range of the second network device is between at least two waypoints, the second network device is selected as one of the candidate target network devices.

[0213] The first network device may determine the CHO configuration and CHO trigger condition of each candidate target network device according to the second message sent by the received candidate target network device, and send the CHO configuration and CHO trigger condition of the candidate target network device to the terminal device. Among them, the CHO configuration may include the cell identifier (identifier, ID) of the candidate target network device, the cell radio network temporary identifier (cell-radio network temporary identifier, C-RNTI), the security algorithm ID, the key, etc. The CHO trigger condition may include one or more of the RSRP threshold, the location range and the time range of the candidate target network device. Among them, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint for entering the coverage range of the candidate target network device, and the third waypoint is a waypoint for leaving the coverage range of the candidate target network device. The time range includes a first time point and a first duration, the first time point is the time point for entering the coverage range of the candidate target network device, and the first duration is the duration for entering the coverage range of the candidate target network device.

[0214] Finally, the terminal device receives the CHO configuration and CHO trigger condition of the candidate target network device from the first network device, and performs conditional switching based on the CHO configuration and CHO trigger condition of the candidate target network device. Specifically, the following optional methods are included:

[0215] In one implementation, if the terminal device enters the coverage of the candidate target network device and measures that the signal quality of the candidate target network device meets the first threshold, the terminal device switches from the cell of the source base station to the cell of the candidate target base station through the CHO configuration. The signal quality may be RSRP. The first threshold may be an RSRP threshold.

[0216] In another implementation, when the terminal device enters the coverage of the candidate target network device through the second waypoint (leaves the coverage of the candidate target network device without passing through the third waypoint, or leaves the coverage of the candidate target network device through the third waypoint), and the terminal device measures that the signal quality of the candidate target network device meets the first threshold, the terminal device switches from the cell of the first network device to the cell of the candidate target network device through the CHO configuration. That is, when the RSRP threshold and location range of the candidate target network device are met at the same time, the cell of the first network device is switched to the cell of the candidate target network device.

[0217] In another implementation, when the terminal device enters the coverage of the candidate target network device at the first time point, and the signal quality of the candidate target network device is continuously measured to meet the first threshold value within the first time period, the terminal device switches from the cell of the first network device to the cell of the candidate target network device through the CHO configuration. That is, when the RSRP threshold and time range of the candidate target network device are met at the same time, the terminal device switches from the cell of the first network device to the cell of the candidate target network device.

[0218] In another implementation, when the terminal device passes the second waypoint and enters the coverage of the candidate target network device at the first time point, and the signal quality of the candidate target network device is continuously measured to meet the first threshold value within the first time period, the terminal device switches from the cell of the first network device to the cell of the candidate target network device through the CHO configuration. That is, when the RSRP threshold, location range and time range of the candidate target network device are met at the same time, the terminal device switches from the cell of the first network device to the cell of the candidate target network device.

[0219] In an embodiment of the present application, in view of the different tolerance levels of waypoint deviations of different second network devices for mobile paths, the first network device obtains the waypoint deviation tolerance information of different second network devices, determines the message reporting restriction condition information and sends it to the terminal device, thereby satisfying the restrictions of different second network devices on mobile path update indication messages and improving the flexibility of communication.

[0220] See also Fig. 9 , Fig. 9 It is a flow chart of a communication method provided by an embodiment of the present application. In the embodiment of the present application, the first network device may be a source base station, the second network device may be one or more neighboring base stations (adjacent to the source base station), and the terminal device may be a drone. The method includes but is not limited to the following steps:

[0221] S901, a first network device sends a first message to a second network device, where the first message includes moving path information of a terminal device.

[0222] The first message may be a handover request message. The mobile path information is used to indicate a mobile path (also referred to as a flight path). The mobile path may include one or more waypoints. The mobile path information may include location information of one or more waypoints that the terminal device is expected to arrive at. The mobile path information may also include a time stamp corresponding to the expected arrival at the one or more waypoints. The mobile path information may also include location information of one or more waypoints that the terminal device is expected to arrive at, and a time stamp corresponding to the expected arrival at the one or more waypoints.

[0223] Optionally, before the first network device sends the first message to the second network device, the first network device may send measurement control information to the terminal device, wherein the measurement control information includes a reference signal receiving quality (RSRP) threshold. The terminal device measures other network devices adjacent to the first network device according to the measurement control information to obtain a measurement report, and sends the measurement report to the first network device. The measurement report may include the measured RSRP of other network devices.

[0224] Optionally, before the first network device sends the first message to the second network device, the terminal device may report the moving path information to the first network device.

[0225] S902, the second network device sends a second message to the first network device, where the second message includes first indication information, and the first indication information is used to indicate whether the second network device supports providing services for the terminal device.

[0226] Specifically, the second network device can determine whether the second network device supports providing services to the terminal device based on the coverage range and mobile path information of the second network device. For example, if any waypoint in the mobile path is outside the coverage range of the second network device, it is determined that the second network device does not support providing services to the terminal device. If there are one or more waypoints in the mobile path that are within the coverage range of the second network device, it is determined that the second network device supports providing services to the terminal device. After the second network device determines whether the second network device supports providing services to the terminal device, it sends a second message to the first network device, and the second message includes the first indication information.

[0227] In the embodiment of the present application, if the second network device supports providing services for the terminal device, the second network device may include the following information in the second message of the reply:

[0228] In one implementation, the second message further includes at least one waypoint, and the at least one waypoint is a waypoint in the mobile path that is within the coverage of the second network device. The waypoints within the coverage of the second network device may include one or more waypoints. Figure 7 As shown, Figure 7It is a schematic diagram of a waypoint. The moving path includes waypoints such as waypoint 1 to waypoint 5, wherein waypoint 3 is within the coverage range of the base station, and waypoint 4 is within the coverage range of base station 2. It can be seen that both base station 1 and base station 2 support providing services to terminal devices. The waypoints within the coverage range of the second network device can also be a range, represented by waypoints entering the coverage range of the second network device and waypoints leaving the coverage range of the second network device. For example, the waypoints within the coverage range of the second network device include waypoint 2 and waypoint 5, wherein waypoint 2 is a waypoint entering the coverage range of the second network device, and waypoint 5 is a waypoint leaving the coverage range of the second network device. If multiple discontinuous waypoints appear within the coverage range of the second network device, the multiple waypoints can be represented in segments. For example, waypoint 2-waypoint 5, waypoint 7, and waypoint 10-waypoint 12. Optionally, multiple waypoints can also be represented in the order of entering the coverage range of the second network device. For example, waypoints 2 to 5 represent the first entry into the coverage of the second network device, waypoint 7 represents the second entry into the coverage of the second network device, and waypoints 10 to 12 represent the third entry into the coverage of the second network device.

[0229] In another implementation, the second message further includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage range of the second network device is located between the at least two waypoints. Figure 8 As shown, Figure 8 This is another waypoint diagram. The moving path includes waypoints such as waypoint 1 to waypoint 5. The coverage of base station 1 is between waypoint 2 and waypoint 3, and the coverage of base station 2 is between waypoint 3 and waypoint 4. It can be seen that base station 1 and base station 2 both support providing services for terminal devices.

[0230] Optionally, if the second network device does not support providing services to the terminal device (for example, it is determined that all waypoints in the moving path are outside the coverage of the second network device), the second network device may send a handover preparation failure message to the first network device. Optionally, if the second network device does not support providing services to the terminal device, the second network device may not send any message to the first network device. In the case where the first network device does not receive any message returned by the second network device after sending a first message to the second network device, the first network device may determine that the second network device does not support providing services to the terminal device.

[0231] Optionally, the second message may also include waypoint deviation tolerance information, and the waypoint deviation tolerance information is used to indicate the distance range in which the terminal device is allowed to deviate from the moving path corresponding to the moving path information. Specifically, the second network device may determine the waypoint deviation tolerance information for the waypoints in the moving path of the terminal device based on the coverage range and moving path information of the second network device. Then a second message is sent to the first network device, and the second message includes the waypoint deviation tolerance information. For example, for waypoints within the coverage range of the second network device, the second network device may allow the terminal device to deviate from the moving path by a distance greater than or equal to 0. For waypoints outside the coverage range of the second network device, the second network device allows the terminal device to deviate from the moving path by a distance equal to 0 or infinity. Waypoint deviation tolerance information may include the following situations:

[0232] In one implementation, the waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint being a waypoint in the moving path, and the first distance threshold being a distance threshold of the terminal device deviating from the first waypoint. It can be understood that, for each waypoint in the moving path, the second network device can configure a first distance threshold. Optionally, the first waypoint is a waypoint in the moving path that is within the coverage of the second network device. It can be understood that, for waypoints in the moving path that are within the coverage of the second network device, the first distance threshold can be configured, while for waypoints in the moving path that are outside the coverage of the second network device, the first distance threshold does not need to be configured. It should be noted that for waypoints that are not configured with the first distance threshold, it means that the second network device is not interested in the waypoint, that is, no matter how far the terminal device deviates from the waypoint during the actual movement, it will not trigger the reporting of the moving path update indication information.

[0233] In another implementation, the waypoint deviation tolerance information includes a second distance threshold, which is a distance threshold of the terminal device deviating from any waypoint in the moving path. It can be understood that the second network device configures one or more second distance thresholds for the moving path of the terminal device.

[0234] The second message may be a handover request acknowledgement message. The handover request acknowledgement message may include a CHO configuration of the second network device. The CHO configuration may include a cell identifier (ID), a cell-radio network temporary identifier (C-RNTI), a security algorithm ID, a key, etc. of the second network device.

[0235] The embodiment of the present application can also be applied to a multi-hop scenario, and the multi-hop scenario is introduced below:

[0236] After receiving the first message, the second network device may send a third message to the third network device, wherein the third message includes the moving path information. After receiving the third message, the third network device may determine whether the third network device supports providing services for the terminal device according to the coverage range and moving path information of the third network device, which is the same as the method in which the second network device determines whether the second network device supports providing services for the terminal device, and will not be repeated here. If the third network device supports providing services for the terminal device, the third network device sends a fourth message to the second network device, wherein the fourth message includes third indication information, and the third indication information is used to indicate that the third network device supports providing services for the terminal device. If the third network device does not support providing services for the terminal device, the third network device sends a fourth message to the second network device, wherein the fourth message includes fourth indication information, and the fourth indication information is used to indicate that the third network device does not support providing services for the terminal device. Alternatively, if the third network device does not support providing services for the terminal device, the fourth network device does not send any message, and the second network device may determine that the third network device does not support providing services for the terminal device without receiving any message. Among them, the third message may be a handover request message, and the fourth message may be a handover request confirmation message or a handover preparation failure message. Among them, the second network device is adjacent to the third network device.

[0237] After receiving the third indication information, the second network device may send a fifth message to the first network device, wherein the fifth message includes the third indication information, and the fifth message is a switching request confirmation message. That is, after determining the first indication information, the second network device may first send the first indication information to the first network device through the first message. After receiving the third indication information, the third indication information is sent to the first network device through the fifth message. Alternatively, after receiving the third indication information, the second network device sends the first indication information and the third indication information to the first network device through the first message. That is, after determining the first indication information, the second network device waits for receiving the third indication information, and finally sends the first indication information and the third indication information together to the first network device through the first message.

[0238] Further optionally, if the last waypoint in the moving path is within the coverage of the third network device, the third network device no longer sends a switching request message to other network devices adjacent to it, otherwise it continues to send a switching request message.

[0239] S903: The first network device sends the CHO configuration and CHO triggering condition of the candidate target network device to the terminal device.

[0240] Specifically, after the first network device receives the second message sent by one or more second network devices, it can select a candidate target network device for executing conditional switching CHO from at least one of the second network devices based on the second message. Specifically, if the second message sent by the second network device includes first indication information, and the first indication information is used to indicate that the second network device supports providing services for the terminal device, the second network device is selected as one of the candidate target network devices. And / or, if the second message sent by the second network device includes at least one waypoint, and the at least one waypoint is a waypoint in the mobile path that is within the coverage of the second network device, the second network device is selected as one of the candidate target network devices. And / or, if the second message sent by the second network device includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage of the second network device is between at least two waypoints, the second network device is selected as one of the candidate target network devices.

[0241] Then, the first network device can determine the CHO configuration and CHO trigger condition of each candidate target network device according to the second message sent by the received candidate target network device, and send the CHO configuration and CHO trigger condition of the candidate target network device to the terminal device. Among them, the CHO configuration may include the cell identifier (identifier, ID) of the candidate target network device, the cell radio network temporary identifier (cell-radio network temporary identifier, C-RNTI), the security algorithm ID, the key, etc. The CHO trigger condition may include one or more of the RSRP threshold, the location range and the time range of the candidate target network device. Among them, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint for entering the coverage range of the candidate target network device, and the third waypoint is a waypoint for leaving the coverage range of the candidate target network device. The time range includes a first time point and a first duration, the first time point is the time point for entering the coverage range of the candidate target network device, and the first duration is the duration of entering the coverage range of the candidate target network device.

[0242] Finally, the terminal device receives the CHO configuration and CHO trigger condition of the candidate target network device from the first network device, and performs conditional switching based on the CHO configuration and CHO trigger condition of the candidate target network device. Specifically, the following optional methods are included:

[0243] In one implementation, if the terminal device enters the coverage of the candidate target network device and measures that the signal quality of the candidate target network device meets the first threshold, the terminal device switches from the cell of the source base station to the cell of the candidate target base station through the CHO configuration. The signal quality may be RSRP. The first threshold may be an RSRP threshold.

[0244] In another implementation, when the terminal device enters the coverage of the candidate target network device through the second waypoint (it may leave the coverage of the candidate target network device without passing through the third waypoint, or it may leave the coverage of the candidate target network device through the third waypoint), and the terminal device measures that the signal quality of the candidate target network device meets the first threshold, the terminal device switches from the cell of the first network device to the cell of the candidate target network device through the CHO configuration. That is, when the RSRP threshold and location range of the candidate target network device are met at the same time, the cell of the first network device is switched to the cell of the candidate target network device.

[0245] In another implementation, when the terminal device enters the coverage of the candidate target network device at the first time point, and the signal quality of the candidate target network device is continuously measured to meet the first threshold value within the first time period, the terminal device switches from the cell of the first network device to the cell of the candidate target network device through the CHO configuration. That is, when the RSRP threshold and time range of the candidate target network device are met at the same time, the terminal device switches from the cell of the first network device to the cell of the candidate target network device.

[0246] In another implementation, when the terminal device passes the second waypoint and enters the coverage of the candidate target network device at the first time point, and the signal quality of the candidate target network device is continuously measured to meet the first threshold value during the first time period, the terminal device switches from the cell of the first network device to the cell of the candidate target network device through the CHO configuration. That is, when the RSRP threshold, location range and time range of the candidate target network device are met at the same time, the terminal device switches from the cell of the first network device to the cell of the candidate target network device.

[0247] Optionally, after the first network device receives the second message sent by multiple second network devices, it can also determine the message reporting restriction information based on one or more waypoint deviation tolerance information of the candidate target network devices (excluding the second network devices that do not support providing services to the terminal device). Then, the message reporting restriction information is sent to the terminal device. Among them, the message reporting restriction information may include sending a mobile path update indication message when the deviation from the predetermined waypoint exceeds 20 meters, or sending a mobile path update indication message when arriving at the predetermined waypoint more than 10 minutes late or early. Alternatively, the message reporting restriction information may also include a distance threshold (e.g., 20 meters) or a time threshold (e.g., 10 minutes).

[0248] Furthermore, the first network device may select the one with the smallest waypoint deviation tolerance from the received multiple waypoint deviation tolerance information as the message reporting restriction information. Alternatively, the first network device may calculate the average of the waypoint deviation tolerance based on the received multiple waypoint deviation tolerance information, and use the calculated average of the waypoint deviation tolerance as the message reporting restriction information. Other methods may also be used to determine the reporting restriction information, which is not limited in this application.

[0249] The terminal device receives the message reporting restriction information from the first network device, and when the mobile state of the terminal device satisfies the message reporting restriction information, the terminal device sends a mobile path update indication message. The mobile state may include the location information of the terminal device during the actual movement, or the time point when the terminal device actually arrives at a certain waypoint.

[0250] For example, the mobile path includes the time when the drone is expected to arrive at waypoint 1 within the coverage of base station 1, but the drone actually arrives within the coverage of base station 1, and the distance offset from waypoint 1 is 25 meters. At this time, the message reporting restriction information is met, and the drone can send a mobile path update indication message to request to update the mobile path. For another example, the mobile path includes the time when the drone is expected to arrive at waypoint 2 within the coverage of base station 2 at 13:25, but the drone actually arrives at waypoint 2 within the coverage of base station 2 at 13:50, which is 25 minutes late. At this time, the message reporting restriction information is met, and the drone can send a mobile path update indication message to request to re-update the mobile path. Alternatively, a mobile path update indication message is sent when the terminal device deviates from the predetermined waypoint by more than 20 meters during actual movement, or arrives at the predetermined waypoint more than 10 minutes late or early.

[0251] In the embodiment of the present application, in the CHO scenario, the first network device sends the mobile path information to the second network device, and the second network device determines whether its coverage range supports providing services to the terminal device. The first network device determines the target candidate network device for conditional switching based on the feedback from the second network device on whether it supports providing services to the terminal device, and avoids sending the CHO configuration and CHO switching conditions of the network device that does not support providing services to the terminal device to the terminal device, thereby reducing signaling overhead and improving communication efficiency.

[0252] It can be understood that in the above-mentioned method embodiments, the methods and operations implemented by the terminal device can also be implemented by components that can be used for the terminal device (such as chips or circuits), and the methods and operations implemented by the network device can also be implemented by components that can be used for the network device (such as chips or circuits).

[0253] The embodiment of the present application can divide the functional modules of the terminal device or network device according to the above method example. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation. The following is an example of using each functional module divided according to each function to illustrate.

[0254] Above, combined Figure 6 and Fig. 9 The method provided by the embodiment of the present application is described in detail. Figure 10 to Figure 11 The communication device provided in the embodiment of the present application is described in detail. It should be understood that the description of the device embodiment corresponds to the description of the method embodiment, so the contents not described in detail can be referred to the method embodiment above, and will not be repeated here for the sake of brevity.

[0255] See also Fig.10 , Fig.10 1001 is a schematic diagram of a communication device provided in an embodiment of the present application. The communication device may include a receiving module 1001, a processing module 1002 and a sending module 1003.

[0256] Optionally, the communication device may implement the steps or processes executed by the network device in the above method embodiment, for example, it may be a network device, or a chip or circuit configured in the network device. The receiving module 1001 and the sending module 1003 are used to perform the sending and receiving related operations on the network device side in the above method embodiment, and the processing module 1002 is used to perform the processing related operations of the network device in the above method embodiment.

[0257] In one embodiment:

[0258] The sending module 1003 is used to send a first message to the second network device, where the first message includes the moving path information of the terminal device;

[0259] The receiving module 1001 is used to receive a second message from the second network device, wherein the second message includes waypoint deviation tolerance information, and the waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

[0260] Optionally, the waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint being a waypoint in the moving path, and the first distance threshold being a distance threshold of the terminal device deviating from the first waypoint.

[0261] Optionally, the waypoint deviation tolerance information includes a second distance threshold, where the second distance threshold is a distance threshold of the terminal device deviating from any waypoint in the moving path.

[0262] Optionally, the processing module 1002 is used to determine message reporting restriction condition information based on the waypoint deviation tolerance information;

[0263] The sending module 1003 is used to send the message reporting restriction condition information to the terminal device, and the message reporting restriction condition information is used to restrict the terminal device from sending a moving path update indication message.

[0264] Optionally, the processing module 1002 is configured to select a waypoint deviation tolerance with the smallest waypoint deviation tolerance from the received multiple waypoint deviation tolerance information as the message reporting restriction condition information.

[0265] Optionally, the second message also includes first indication information, and the first indication information is used to indicate whether the second network device supports providing services for the terminal device.

[0266] Optionally, the second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the moving path that is within the coverage range of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage range of the second network device is between the at least two waypoints.

[0267] Optionally, the processing module 1002 is configured to select, based on the second message, a candidate target network device for executing conditional handover CHO from at least one of the second network devices.

[0268] Optionally, the sending module 1003 is used to send the CHO configuration and CHO triggering condition of the candidate target network device to the terminal device.

[0269] Optionally, the CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint entering the coverage range of the candidate target network device, and the third waypoint is a waypoint leaving the coverage range of the candidate target network device.

[0270] Optionally, the CHO trigger condition includes a time range, the time range includes a first time point and a first duration, the first time point is the time point of entering the coverage range of the candidate target network device, and the first duration is the duration of entering the coverage range of the candidate target network device.

[0271] It should be noted that the implementation of each module can also refer to Figure 6 and Fig. 9 The corresponding description of the method embodiment shown executes the method and functions performed by the first network device in the above embodiment.

[0272] In another embodiment:

[0273] The receiving module 1001 is used to receive a first message from a first network device, where the first message includes moving path information of a terminal device;

[0274] The sending module 1003 is used to send a second message to the first network device, wherein the second message includes first waypoint deviation tolerance information, and the first waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

[0275] Optionally, the first waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint is a waypoint in the moving path, and the first distance threshold is a distance away from the first waypoint.

[0276] Optionally, the first waypoint deviation tolerance information includes a second distance threshold, and the second distance threshold is the distance that the terminal device deviates from any waypoint in the moving path.

[0277] Optionally, the second message also includes first indication information, and the first indication information is used to indicate whether the second network device supports providing services for the terminal device.

[0278] Optionally, the second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the moving path that is within the coverage range of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage range of the second network device is between the at least two waypoints.

[0279] Optionally, the sending module 1003 is also used to send a third message to a third network device, and the third message includes the moving path information; the receiving module 1001 is also used to receive a fourth message from the third network device, and the fourth message includes second waypoint deviation tolerance information, and the second waypoint deviation tolerance information is used to indicate the distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

[0280] Optionally, the sending module 1003 is further used to send a fifth message to the first network device, where the fifth message includes the second waypoint deviation tolerance information.

[0281] It should be noted that the implementation of each module can also refer to Figure 6 and Fig. 9 The corresponding description of the method embodiment shown executes the method and functions performed by the first network device or the second network device in the above embodiment.

[0282] See also Fig.11 , Fig.11 11 is a schematic diagram of a communication device provided in an embodiment of the present application. The communication device may include a receiving module 1101, a processing module 1102 and a sending module 1103.

[0283] Optionally, the communication device may implement the steps or processes executed by the terminal device in the above method embodiment, for example, it may be a network device, or a chip or circuit configured in the terminal device. The receiving module 1101 and the sending module 1103 are used to perform the sending and receiving related operations on the terminal device side in the above method embodiment, and the processing module 1102 is used to perform the processing related operations of the terminal device in the above method embodiment.

[0284] A receiving module 1101 is used to receive message reporting restriction information from a first network device, where the message reporting restriction information is determined based on waypoint deviation tolerance information, where the waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information;

[0285] The sending module 1103 is used to send a moving path update indication message when the moving state of the terminal device meets the message reporting restriction condition information.

[0286] In one possible design, the receiving module 1101 is used to receive a conditional switching CHO configuration and a CHO triggering condition of a candidate target network device from the first network device, where the candidate target network device is a second network device that supports providing services for the terminal device;

[0287] The processing module 1102 is configured to perform conditional switching based on the CHO configuration and the CHO triggering condition.

[0288] In one possible design, the CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint entering the coverage range of the candidate target network device, and the third waypoint is a waypoint leaving the coverage range of the candidate target network device;

[0289] Processing module 1102 is used to switch from the cell of the first network device to the cell of the candidate target network device through the CHO configuration when the terminal device passes through the second waypoint and enters the coverage of the candidate target network device and the signal quality of the candidate target network device measured by the terminal device meets the first threshold.

[0290] In a possible design, the CHO trigger condition includes a time range, the time range includes a first time point and a first duration, the first time point is a time point of entering the coverage range of the candidate target network, and the first duration is a duration of entering the coverage range of the candidate target network device;

[0291] Processing module 1102 is used to switch from the cell of the first network device to the cell of the candidate target network device through the CHO configuration when the terminal device enters the coverage of the candidate target network device at the first time point and the signal quality of the candidate target network device measured within the first time period meets the first threshold.

[0292] It should be noted that the implementation of each module can also refer to Figure 6 and Fig. 9 The corresponding description of the method embodiment shown executes the method and functions performed by the terminal device in the above embodiment.

[0293] Fig.12 is a schematic diagram of the structure of a network device provided in an embodiment of the present application. The network device can be applied to Figure 1 In the system shown, the functions of the network device in the above method embodiment are executed, or the steps or processes executed by the network device in the above method embodiment are realized.

[0294] like Fig.12As shown, the network device includes a processor 1201 and a transceiver 1202. Optionally, the network device also includes a memory 1203. The processor 1201, the transceiver 1202 and the memory 1203 can communicate with each other through an internal connection path to transmit control and / or data signals. The memory 1203 is used to store a computer program, and the processor 1201 is used to call and run the computer program from the memory 1203 to control the transceiver 1202 to send and receive signals. Optionally, the network device may also include an antenna for sending the uplink data or uplink control signaling output by the transceiver 1202 through a wireless signal.

[0295] The processor 1201 and the memory 1203 may be combined into a processing device, and the processor 1201 is used to execute the program code stored in the memory 1203 to implement the above functions. In specific implementation, the memory 1203 may also be integrated into the processor 1201, or independent of the processor 1201. Fig.10 Corresponding to the processing module in.

[0296] The transceiver 1202 can be used with Fig.10 The receiving module and the sending module in the embodiment correspond to each other, and may also be referred to as a transceiver unit or a transceiver module. The transceiver 1202 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). The receiver is used to receive signals, and the transmitter is used to transmit signals.

[0297] It should be understood that Fig.12 The network equipment shown can achieve Figure 6 and Fig. 9 The method embodiment shown involves various processes of the network device. The operations and / or functions of each module in the network device are respectively to implement the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiment. To avoid repetition, the detailed description is appropriately omitted here.

[0298] The processor 1201 can be used to execute the actions implemented by the network device in the previous method embodiment, and the transceiver 1202 can be used to execute the actions of the network device sending to or receiving from the network device described in the previous method embodiment. Please refer to the description in the previous method embodiment for details, which will not be repeated here.

[0299] Among them, the processor 1201 can be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the contents disclosed in this application. The processor 1201 can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. The communication bus 1204 can be a peripheral component interconnect standard PCI bus or an extended industrial standard structure EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.12 Only one thick line is used to represent it, but it does not mean that there is only one bus or one type of bus. The communication bus 1204 is used to realize the connection and communication between these components. Among them, the transceiver 1202 in the embodiment of the present application is used to communicate signaling or data with other node devices. The memory 1203 may include volatile memory, such as nonvolatile dynamic random access memory (NVRAM), phase change random access memory (PRAM), magnetoresistive random access memory (MRAM), etc., and may also include non-volatile memory, such as at least one disk storage device, electrically erasable programmable read-only memory (EEPROM), flash memory devices, such as NOR flash memory or NAND flash memory, semiconductor devices, such as solid state disk (SSD), etc. The memory 1203 may also be at least one storage device located away from the aforementioned processor 1201. The memory 1203 may optionally store a set of computer program codes or configuration information. Optionally, the processor 1201 may also execute a program stored in the memory 1203. The processor may cooperate with the memory and the transceiver to execute any method and function of the first network device or the second network device in the above-mentioned application embodiment.

[0300] Fig.13 is a schematic diagram of the structure of a terminal device provided in an embodiment of the present application. The terminal device can be applied to Figure 1 In the system shown, the functions of the terminal device in the above method embodiment are executed, or the steps or processes executed by the terminal device in the above method embodiment are realized.

[0301] like Fig.13 As shown, the terminal device includes a processor 1301 and a transceiver 1302. Optionally, the terminal device also includes a memory 1303. The processor 1301, the transceiver 1302 and the memory 1303 can communicate with each other through an internal connection path to transmit control and / or data signals. The memory 1303 is used to store a computer program, and the processor 1301 is used to call and run the computer program from the memory 1303 to control the transceiver 1302 to send and receive signals. Optionally, the terminal device may also include an antenna for sending the uplink data or uplink control signaling output by the transceiver 1302 through a wireless signal.

[0302] The processor 1301 and the memory 1303 may be combined into a processing device, and the processor 1301 is used to execute the program code stored in the memory 1303 to implement the above functions. In specific implementation, the memory 1303 may also be integrated into the processor 1301, or independent of the processor 1301. Fig.11 Corresponding to the processing module in.

[0303] The transceiver 1302 can be used with Fig.11 The receiving module and the sending module in the embodiment correspond to each other, and may also be referred to as a transceiver unit or a transceiver module. The transceiver 1302 may include a receiver (or receiver, receiving circuit) and a transmitter (or transmitter, transmitting circuit). The receiver is used to receive signals, and the transmitter is used to transmit signals.

[0304] It should be understood that Fig.13 The terminal equipment shown is capable of implementing Figure 6 and Fig. 9 The method embodiment shown involves various processes of the terminal device. The operations and / or functions of each module in the terminal device are respectively to implement the corresponding processes in the above method embodiment. For details, please refer to the description in the above method embodiment. To avoid repetition, the detailed description is appropriately omitted here.

[0305] The processor 1301 can be used to execute the actions implemented by the terminal device in the previous method embodiment, and the transceiver 1302 can be used to execute the actions of the terminal device sending to or receiving from the terminal device described in the previous method embodiment. Please refer to the description in the previous method embodiment for details, which will not be repeated here.

[0306] The processor 1301 may be any of the above mentioned processors. The communication bus 1304 may be a PCI bus or an EISA bus. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.13Only one thick line is used to represent it, but it does not mean that there is only one bus or one type of bus. The communication bus 1304 is used to realize the connection and communication between these components. Among them, the transceiver 1302 of the device in the embodiment of the present application is used to communicate signaling or data with other devices. The memory 1303 can be the various types of memory mentioned above. The memory 1303 can also be at least one storage device located away from the aforementioned processor 1301. A group of computer program codes or configuration information are stored in the memory 1303, and the processor 1301 executes the program in the memory 1303. The processor can cooperate with the memory and the transceiver to execute any one of the methods and functions of the terminal device in the above-mentioned application embodiment.

[0307] An embodiment of the present application also provides a chip system, which includes a processor for supporting a terminal device or a network device to implement the functions involved in any of the above embodiments, such as generating or processing the broadcast services involved in the above method.

[0308] In one possible design, the chip system may also include a memory, which is used for computer programs and data necessary for the terminal device or network device. The chip system may be composed of a chip, or may include a chip and other discrete devices. The input and output of the chip system correspond to the receiving and sending operations of the terminal device or network device in the method embodiment, respectively.

[0309] According to the method provided in the embodiment of the present application, the present application also provides a computer program product, the computer program product comprising: a computer program, when the computer program is run on a computer, causes the computer to execute Figure 6 and Fig. 9 A method according to any one of the embodiments shown.

[0310] According to the method provided in the embodiment of the present application, the present application also provides a computer-readable medium, which stores a computer program, and when the computer program is run on a computer, the computer executes Figure 6 and Fig. 9 A method according to any one of the embodiments shown.

[0311] According to the method provided in the embodiment of the present application, the present application also provides a communication system, which includes one or more terminal devices and one or more network devices as mentioned above.

[0312] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or data center that includes one or more available media integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a high-density digital video disc (DVD)), or a semiconductor medium (eg, a solid state disc (SSD)).

[0313] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: The method comprises: The first network device sends a first message to the second network device, where the first message includes moving path information of the terminal device; The first network device receives a second message from the second network device, where the second message includes waypoint deviation tolerance information, where the waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

2. The method according to claim 1, characterized in that The waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint is a waypoint in the moving path, and the first distance threshold is a distance threshold of the terminal device deviating from the first waypoint.

3. The method according to claim 1, characterized in that The waypoint deviation tolerance information includes a second distance threshold, where the second distance threshold is a distance threshold of the terminal device deviating from any waypoint in the moving path.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: The first network device determines message reporting restriction condition information based on the waypoint deviation tolerance information; The first network device sends the message reporting restriction condition information to the terminal device, where the message reporting restriction condition information is used to restrict the terminal device from sending a mobile path update indication message.

5. The method according to claim 4, characterized in that The first network device determines, based on the waypoint deviation tolerance information, that the message reporting restriction condition information includes: The first network device selects one with the smallest waypoint deviation tolerance from the received plurality of waypoint deviation tolerance information as the message reporting restriction condition information.

6. The method according to any one of claims 1 to 5, characterized in that: The second message also includes first indication information, where the first indication information is used to indicate whether the second network device supports providing services for the terminal device.

7. The method according to any one of claims 1 to 6, characterized in that: The second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the moving path that is within the coverage range of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage range of the second network device is between the at least two waypoints.

8. The method according to claim 6 or 7, characterized in that The method further comprises: The first network device selects a candidate target network device for executing conditional handover CHO from at least one of the second network devices based on the second message.

9. The method according to claim 8, characterized in that The method further comprises: The first network device sends the CHO configuration and the CHO triggering condition of the candidate target network device to the terminal device.

10. The method according to claim 9, characterized in that The CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint entering the coverage range of the candidate target network device, and the third waypoint is a waypoint leaving the coverage range of the candidate target network device.

11. The method according to claim 9 or 10, characterized in that The CHO trigger condition includes a time range, and the time range includes a first time point and a first duration, the first time point is the time point of entering the coverage range of the candidate target network device, and the first duration is the duration of entering the coverage range of the candidate target network device.

12. A communication method, characterized in that: The method comprises: The second network device receives a first message from the first network device, where the first message includes moving path information of the terminal device; The second network device sends a second message to the first network device, where the second message includes first waypoint deviation tolerance information, where the first waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

13. The method according to claim 12, characterized in that The first waypoint deviation tolerance information includes a first waypoint and a first distance threshold, the first waypoint is a waypoint in the moving path, and the first distance threshold is a distance away from the first waypoint.

14. The method according to claim 12, characterized in that The first waypoint deviation tolerance information includes a second distance threshold, and the second distance threshold is a distance that the terminal device deviates from any waypoint in the moving path.

15. The method according to any one of claims 12 to 14, characterized in that: The second message also includes first indication information, where the first indication information is used to indicate whether the second network device supports providing services for the terminal device.

16. The method according to any one of claims 12 to 15, characterized in that: The second message also includes at least one waypoint, and the at least one waypoint is a waypoint in the moving path that is within the coverage range of the second network device, or the second message also includes at least two waypoints and second indication information, and the second indication information is used to indicate that the coverage range of the second network device is between the at least two waypoints.

17. The method according to any one of claims 12 to 16, characterized in that: The method further comprises: The second network device sends a third message to a third network device, where the third message includes the moving path information; The second network device receives a fourth message from the third network device, wherein the fourth message includes second waypoint deviation tolerance information, and the second waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information.

18. The method according to claim 17, characterized in that The method further comprises: The second network device sends a fifth message to the first network device, where the fifth message includes the second waypoint deviation tolerance information.

19. A communication method, characterized in that: The method comprises: The terminal device receives message reporting restriction information from the first network device, where the message reporting restriction information is determined based on waypoint deviation tolerance information, where the waypoint deviation tolerance information is used to indicate a distance range within which the terminal device is allowed to deviate from the moving path corresponding to the moving path information; When the moving state of the terminal device satisfies the message reporting restriction condition information, the terminal device sends a moving path update indication message.

20. The method of claim 19, wherein: The method further comprises: The terminal device receives a conditional handover CHO configuration and a CHO triggering condition of a candidate target network device from the first network device, where the candidate target network device is a second network device that supports providing services to the terminal device; The terminal device performs conditional switching based on the CHO configuration and the CHO trigger condition.

21. The method of claim 20, wherein: The CHO trigger condition includes a location range, the location range includes a second waypoint and a third waypoint, the second waypoint is a waypoint entering the coverage range of the candidate target network device, and the third waypoint is a waypoint leaving the coverage range of the candidate target network device; The terminal device performing conditional switching based on the CHO configuration and the CHO trigger condition includes: When the terminal device passes through the second waypoint and enters the coverage of the candidate target network device, and the terminal device measures that the signal quality of the candidate target network device meets the first threshold, the terminal device switches from the cell of the first network device to the cell of the candidate target network device through the CHO configuration.

22. The method according to claim 20 or 21, characterized in that The CHO trigger condition includes a time range, the time range includes a first time point and a first duration, the first time point is the time point of entering the coverage range of the candidate target network, and the first duration is the duration of entering the coverage range of the candidate target network device; The terminal device performing conditional switching based on the CHO configuration and the CHO trigger condition includes: When the terminal device enters the coverage of the candidate target network device at the first time point and the signal quality of the candidate target network device measured within the first time period meets the first threshold, the terminal device switches from the cell of the first network device to the cell of the candidate target network device through the CHO configuration.

23. A communication device, characterized in that: The communication device comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the communication device to perform the method according to any one of claims 1 to 11.

24. A communication device, characterized in that: The device comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the communication device to perform the method according to any one of claims 12 to 18.

25. A communication device, characterized in that: The device comprises a memory and a processor, wherein the memory is used to store a computer program, and the processor runs the computer program to enable the communication device to perform the method according to any one of claims 19 to 22.

26. A computer-readable storage medium, characterized in that: The computer-readable storage medium comprises a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 22 is implemented.

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