Communication method and communication apparatus

Abstract

The present application provides a communication method and a communication apparatus. The method comprises: a terminal device receives first information, the first information comprising a first time and a second time, the first time being a time at which the terminal device acquires second information, and the second time being a time at which a neighboring cell starts to cover the terminal device; and the terminal device performs a first operation on the basis of the first time, and performs a second operation on the basis of the second time. The first operation comprises the terminal device acquiring the second information, and the second operation comprises the terminal device using the second information to perform mobility management. The described method enables the terminal device and a network device to be aligned in terms of a transmission time of the second information, thereby preventing the terminal device from performing acquisition of the second information when the second information is not transmitted, and consequently searching for the second information in vain.

Description

Communication method and communication apparatus

[0001] The present application claims priority to the Chinese Patent Application No. 202411266379.0, filed on September 10, 2024, and entitled "Communication method and communication apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of communication, and more particularly, to a communication method and a communication apparatus. BACKGROUND

[0003] Non-terrestrial networks (NTN) such as satellite communication have the advantages of global coverage, long-distance transmission, flexible networking, easy deployment, and no restriction by geographical conditions, and have been widely used in many fields such as maritime communication, positioning and navigation, disaster relief, scientific experiments, video broadcasting, and earth observation.

[0004] In the scenario of satellite communication, due to the large coverage area of the satellite cell, the system message broadcasted by the communication system generally adopts a wave position level transmission manner. For example, when the communication system broadcasts the system message, the system message broadcasted by the communication system to different wave positions in the coverage area can be different. For example, the system message broadcasted by the communication system to the wave position corresponding to the edge area of the coverage range includes relevant information (e.g., information for cell measurement) for same / frequency cell reselection, and the system message broadcasted by the communication system to the wave position corresponding to the non-edge area (or called central area) of the coverage range can not include the relevant information for same / frequency cell reselection. For the system message adopting the wave position level transmission manner, how the terminal device acquires the system message including the information for cell measurement at the accurate timing and performs cell measurement at the effective timing is a current research hotspot. SUMMARY

[0005] The present application provides a communication method and a communication apparatus, which can enable the terminal device to acquire the information for mobility management at the accurate timing and perform mobility management at the accurate timing, thereby guaranteeing the communication performance of the terminal device.

[0006] In a first aspect, a communication method is provided, which can be executed by a terminal device. Here, the terminal device can refer to the terminal device itself, or a processor, module, chip, or chip system, etc. in the terminal device that implements the method, and the present application does not make any limitation thereon.

[0007] The method comprises: receiving first information, the first information comprising a first time and a second time; performing a first operation according to the first time, the first operation being that the terminal device acquires second information; and performing a second operation according to the second time, the second operation being that the terminal device performs mobility management using the second information, wherein the first time is a time at which the terminal device acquires the second information, and the second time is a time at which a neighbor cell starts to cover the terminal device.

[0008] It should be understood that the second information can be carried in a system information block 1 (SIB1) and / or other system information (OSI) broadcast by a network device, and the SIB1 and the OSI can be cell-level or area-level, which is not limited in the present application. The area-level message can be understood as adjusting the direction and parameters of the beam by the communication system according to the specific location or demand of the terminal device, so as to ensure that the transmitted message can be accurately transmitted to the target area. It should be understood that the overall ground range covered by the satellite can be divided into several fixed-size areas, and each area can correspond to a beam position. The area level can also be referred to as the beam level.

[0009] It should also be understood that the second information in the present application is used for mobility management. The mobility management can refer to a radio resource management (RRM) related measurement process and a mobility signaling process triggered based on a measurement result. For example, the mobility management can include one or more of synchronization signal block (SSB) based mobility management, neighbor satellite measurement, or cell measurement.

[0010] It should also be understood that the first time is less than the second time, and the time interval between the first time and the second time helps the terminal device to acquire the second information.

[0011] According to the method provided in the present application, the terminal device acquires the second information according to the first time in the first information, so that the transmission time of the second information between the terminal device and the network device is aligned, avoiding the terminal device from acquiring the second information in the case that the second information is not transmitted, resulting in the terminal device performing a blind search for the second information. In addition, the terminal device performs the second operation according to the second time in the first information, so that the terminal device performs the mobility management at an accurate time, avoiding the terminal device from performing the mobility management after acquiring the second information when the terminal device has not entered the coverage range of the neighbor cell, thereby wasting the resources of the terminal device.

[0012] In some possible implementation manners, the performing the first operation according to the first time comprises:

[0013] when the current time reaches the first time and the terminal device does not acquire the second information, performing the first operation.

[0014] It should be understood that the current time in the present application refers to absolute time, and is always changing. When the current time reaches the first time, it can be understood that the current time is t1, t1 is less than the first time, and as time changes, the current time changes from t1 to t2. Assuming that t2 is equal to the first time, the change of the current time from t1 to t2 can represent that the current time reaches the first time.

[0015] It should also be understood that if the current time reaches the first time and the terminal device has acquired the second information, the terminal device does not need to perform the first operation, thereby avoiding repeated acquisition of the second information by the terminal device and reducing resource consumption of the terminal device.

[0016] Based on the above technical solution, when the current time reaches the first time and the terminal device does not acquire the second information, the terminal device performs acquisition of the second information at the first time, thereby avoiding empty search for the second information by the terminal device and reducing resource consumption.

[0017] In some possible implementation manners, the performing the second operation according to the second time comprises:

[0018] when the current time reaches the second time, performing the second operation.

[0019] It should be understood that when the current time reaches the second time, it can be understood that the current time is t3, t3 is less than the second time, and as time changes, the current time changes from t3 to t4, t4 is equal to the second time, that is, the change of the current time from t3 to t4 can represent that the current time reaches the second time.

[0020] Based on the above technical solution, when the current time reaches the second time, the terminal device performs mobility management, thereby avoiding the terminal device from performing mobility management when the terminal device has acquired the second information and the terminal device is not yet in the coverage range of the neighboring cell, and wasting resources of the terminal device.

[0021] In a second aspect, a communication method is provided, which can be performed by a terminal device. The terminal device can refer to the terminal device itself, a processor, a module, a chip, or a chip system, etc. in the terminal device that implements the method, and the present application does not limit this.

[0022] The method comprises: receiving first information, the first information comprising a first time; and performing a first operation according to the first time, the first operation being that the terminal device acquires second information, the second information being used for mobility management, wherein the first time is a time at which the terminal device acquires the second information.

[0023] It should be understood that the second aspect is similar to some of the above-mentioned first aspect, and relevant content can be referred to the detailed description in the first aspect.

[0024] According to the method provided in the present application, the terminal device acquires the second information according to the first time, the second information being used for mobility management of the terminal device, thereby avoiding the terminal device from repeatedly acquiring the second information and generating unnecessary resource consumption.

[0025] In combination with the second aspect, in some possible implementation manners, the performing the first operation according to the first time comprises:

[0026] When the current time reaches the first time and the terminal device has not acquired the second information, the first operation is performed.

[0027] In a third aspect, a communication method is provided, which can be performed by a terminal device. The terminal device can refer to the terminal device itself, or a processor, a module, a chip or a chip system, etc. in the terminal device that implements the method, and the present application does not make any limitation in this regard.

[0028] The method comprises: receiving first information, the first information comprising a first time and a second time; not performing a first operation according to the first time, the first operation being that the terminal device acquires second information; and performing a second operation according to the second time, the second operation being that the terminal device performs mobility management using the second information, wherein the first time is a time at which the terminal device acquires the second information, and the second time is a time at which a neighbor cell starts to cover the terminal device.

[0029] It should be understood that the third aspect is similar to some of the above-mentioned first aspect, and relevant content can be referred to the detailed description in the first aspect.

[0030] According to the method provided in the present application, the terminal device does not perform the acquisition of the second information according to the first time, thereby avoiding the terminal device from repeatedly acquiring the second information used for mobility management and generating unnecessary resource consumption. In addition, the terminal device performs mobility management according to the second time, which enables the terminal device to perform mobility management at an accurate time, thereby avoiding the terminal device from performing the operation related to mobility management after acquiring system information, resulting in that the terminal device performs mobility management when it is not in the coverage range of a neighbor cell, and wasting resources of the terminal device.

[0031] With reference to the third aspect, in some possible implementation manners, the not performing the first operation according to the first time comprises:

[0032] the current time is greater than the first time, and the terminal device has acquired the second information, and the first operation is not performed.

[0033] Based on the technical solution above, assuming that the current time is greater than the first time, and the terminal device has acquired the second information, the terminal device does not perform the acquisition of the second information, thereby avoiding the terminal device from repeatedly acquiring the same second information and generating unnecessary resource consumption.

[0034] With reference to the third aspect, in some possible implementation manners, the performing the second operation according to the second time comprises:

[0035] the current time reaches the second time, and the second operation is performed.

[0036] Based on the technical solution above, as time changes, when the current time reaches the second time, the terminal device performs the mobility management, thereby avoiding the terminal device from performing the mobility management before the terminal device is in the coverage range of the neighboring cell after the terminal device acquires the second information, and wasting the resources of the terminal device.

[0037] A fourth aspect provides a communication method, which can be executed by a terminal device. The terminal device can refer to the terminal device itself, or a processor, a module, a chip, or a chip system, etc. in the terminal device that implements the method, and the present application does not limit this.

[0038] The method comprises: receiving first information, the first information comprising a second time; and performing a second operation according to the second time, the second operation being mobility management performed by the terminal device using second information, wherein the second time is a time at which a neighboring cell starts to cover the terminal device.

[0039] It should be understood that the fourth aspect is similar to some of the contents of the first aspect to the third aspect above, and the related contents can be referred to the detailed description of the first aspect to the third aspect above.

[0040] According to the method provided in the present application, the time at which the terminal device performs the mobility management is aligned with the second time, so that the terminal device performs the mobility management at an accurate time, thereby avoiding the terminal device from performing the mobility management before the terminal device enters the coverage range of the neighboring cell, and wasting the resources of the terminal device.

[0041] With reference to the fourth aspect, in some possible implementation manners, the performing the second operation according to the second time comprises:

[0042] The current time is greater than or equal to the second time, and the terminal device has acquired the second information, and the second operation is performed.

[0043] In a fifth aspect, a communication method is provided, which can be executed by a terminal device. The terminal device can refer to the terminal device itself, or a processor, a module, a chip, or a chip system, etc. in the terminal device, which implements the method. The present application does not limit this.

[0044] The method includes: receiving first information, the first information including a first distance and a second time; performing a first operation according to the first distance, the first operation being that the terminal device acquires second information, and performing a second operation according to the second time, the second operation being that the terminal device performs mobility management using the second information, wherein the time when the distance between the terminal device and a reference position in a service satellite coverage range is greater than or equal to the first distance is the time when the terminal device acquires the system message, and the second time is the time when a neighbor cell starts to cover the terminal device.

[0045] It should be understood that the fifth aspect is similar to some of the first aspect to the fourth aspect described above, and the related content can be referred to the detailed description of the first aspect to the fourth aspect.

[0046] It should be understood that the service satellite refers to a satellite that provides services for the terminal device. The reference position can refer to a preset anchor point in the service satellite coverage range, or a center position of the service satellite coverage range, or a subsatellite point of the service satellite, etc. The reference position can be located in space or on the ground, and the present application does not limit this.

[0047] According to the method provided by the present application, in the case that the distance between the terminal device and the reference position reaches the first distance, the terminal device performs the acquisition of the second information, avoiding the terminal device to acquire the second information in the case that the distance between the terminal device and the reference position is less than the first distance, resulting in the terminal device to perform the empty search of the second information. In addition, the terminal device performs the mobility management according to the second time in the first information, so that the terminal device performs the mobility management at the accurate time, avoiding the terminal device to perform the mobility management when the terminal device has not yet been in the coverage range of the neighbor cell, and wasting the resource consumption of the terminal device.

[0048] In combination with the fifth aspect, in some possible implementation manners, the performing the first operation according to the first distance includes:

[0049] When the distance between the terminal device and the reference position reaches the first distance, and the terminal device has not acquired the second information, the first operation is performed.

[0050] It should be understood that the distance between the current terminal device and the reference position reaches the first distance can be understood as that the distance between the current terminal device and the reference position is less than the first distance, and due to the movement of the terminal device and / or the movement of the service satellite, the distance between the terminal device and the reference position changes from being less than the first distance to being equal to the first distance, that is, the distance between the current terminal device and the reference position reaches the first distance can represent that the distance between the terminal device and the reference position dynamically changes to reach the first distance.

[0051] Based on the above technical solution, in the case that the distance between the terminal device and the reference position reaches the first distance, and the terminal device does not acquire the second information, the terminal device performs the acquisition of the second information in the case that the distance between the terminal device and the reference position reaches the first distance. Avoiding the terminal device to search for the second information in vain, and reducing the resource consumption of the terminal device.

[0052] In combination with the fifth aspect, in some possible implementation manners, the performing the second operation according to the second time comprises:

[0053] The second operation is performed when the current time reaches the second time.

[0054] Based on the above technical solution, in the case that the current time reaches the second time, the terminal device performs the mobility management, avoiding the terminal device to perform the mobility management after acquiring the second information, and the terminal device not being in the coverage range of the neighbor cell yet, wasting the resource consumption of the terminal device.

[0055] The sixth aspect provides a communication method, which can be executed by a terminal device. Here, the terminal device can refer to the terminal device itself, or a processor, a module, a chip, or a chip system, etc. in the terminal device that implements the method, and the present application does not limit this.

[0056] The method comprises: receiving first information, the first information comprising a first distance and a second time; not performing a first operation according to the first distance, the first operation being the terminal device acquiring second information; and performing a second operation according to the second time, the second operation being the terminal device performing mobility management using the second information, wherein the time when the distance between the terminal device and a reference position in the coverage range of a service satellite is greater than or equal to the first distance is the time when the terminal device acquires the second information, and the second time is the time when a neighbor cell starts to cover the terminal device.

[0057] It should be understood that the sixth aspect is similar to part of the content in the first aspect to the fifth aspect, and the related content can be referred to the detailed introduction in the first aspect to the fifth aspect.

[0058] According to the method provided in the present application, the terminal device does not perform the acquisition of the second information according to the first distance, which can avoid the terminal device from repeatedly acquiring the same second information and causing unnecessary resource consumption. In addition, the terminal device performs the mobility management according to the second time, which can enable the terminal device to perform the mobility management at an accurate time and avoid the terminal device from performing the mobility management when the terminal device is not yet in the coverage range of the neighboring cell after the terminal device acquires the second information, thereby causing the terminal device to perform the cell search on the neighboring cell.

[0059] In combination with the sixth aspect, in some possible implementation manners, the not performing the first operation according to the first distance comprises:

[0060] When the distance between the terminal device and the reference position is greater than the first distance and the terminal device has acquired the second information, the first operation is not performed.

[0061] Based on the above technical solution, assuming that the distance between the terminal device and the reference position is greater than the first distance and the terminal device has acquired the second information, the terminal device does not need to perform the acquisition of the second information again, which can avoid the terminal device from repeatedly acquiring the same second information and causing unnecessary resource consumption.

[0062] In combination with the sixth aspect, in some possible implementation manners, the performing the second operation according to the second time comprises:

[0063] When the current time reaches the second time, the second operation is performed.

[0064] Based on the above technical solution, as the current time reaches the second time, the terminal device performs the mobility management, which can avoid the terminal device from performing the mobility management when the terminal device is not yet in the coverage range of the neighboring cell after the terminal device acquires the second information, thereby causing the terminal device to perform the cell search on the neighboring cell.

[0065] The seventh aspect provides a communication method, which can be performed by a terminal device. The terminal device can refer to the terminal device itself, a processor, a module, a chip, or a chip system, etc. in the terminal device, which implements the method. The present application does not make any limitation in this regard.

[0066] The method comprises the following steps: receiving first information, wherein the first information comprises a second time; and performing a second operation according to the second time, wherein the second operation is that the terminal device performs mobility management by using acquired second information, and the second time is a time when a neighboring cell starts to cover the terminal device.

[0067] It should be understood that the seventh aspect is similar to some of the first aspect to the sixth aspect described above, and the relevant content can be referred to the detailed description of the first aspect to the sixth aspect.

[0068] According to the method provided in the application, the terminal device performs mobility management at the accurate time by aligning the time of the terminal device performing mobility management with the second time, so as to avoid the terminal device performing mobility management when the terminal device is not in the coverage range of the neighbor cell, and thus the terminal device performs empty search on the neighbor cell.

[0069] In combination with the seventh aspect, in some possible implementation manners, the performing the second operation according to the second time comprises:

[0070] When the current time is greater than or equal to the second time and the terminal device has acquired the second information, the second operation is performed.

[0071] An eighth aspect provides a communication method, which can be performed by a terminal device. The terminal device can refer to the terminal device itself, or a processor, a module, a chip, or a chip system, etc. in the terminal device, which implements the method. The application does not limit this.

[0072] The method comprises: receiving first information, wherein the first information comprises a first time and a second distance; performing a first operation according to the first time, wherein the first operation is that the terminal device acquires second information; and performing a second operation according to the second distance, wherein the second operation is that the terminal device performs mobility management by using the second information, wherein the first time is a time at which the terminal device acquires the second information, and when a distance between the terminal device and a reference position in a coverage range of a serving satellite is greater than or equal to the second distance, the terminal device is located in a coverage range of a neighbor cell.

[0073] It should be understood that the eighth aspect is similar to some of the first aspect to the seventh aspect described above, and the relevant content can be referred to the detailed description of the first aspect to the seventh aspect.

[0074] According to the method provided in the application, the terminal device acquires the second information according to the first time in the first information, so that the transmission time of the second information between the terminal device and the network device is aligned, and the terminal device avoids acquiring the second information when the second information is not transmitted, and thus the terminal device avoids empty search on the second information. In addition, the terminal device performs mobility management according to the second distance in the first information, so as to ensure that the terminal device performs mobility management in the coverage range of the neighbor cell, and thus the terminal device avoids acquiring the second information and immediately performing mobility management, and thus the terminal device avoids resource consumption caused by empty search on the neighbor cell when the terminal device is not in the coverage range of the neighbor cell.

[0075] In some possible implementation manners, the performing the first operation according to the first time includes:

[0076] The current time reaches the first time, and the terminal device does not acquire the second information, and the first operation is performed.

[0077] According to the above technical solution, when the current time reaches the first time, and the terminal device does not acquire the second information, the terminal device performs the operation of acquiring the second information at the first time, thereby avoiding the terminal device from searching for the second information in vain, and reducing resource consumption of the terminal device.

[0078] In some possible implementation manners, the performing the second operation according to the second distance includes:

[0079] When the distance between the terminal device and the reference position reaches the second distance, and the terminal device has acquired the second information, the second operation is performed.

[0080] It should be understood that the distance between the current terminal device and the reference position reaching the second distance can be understood as the distance between the current terminal device and the reference position being less than the second distance. Due to movement of the terminal device and / or movement of the serving satellite, the distance between the terminal device and the reference position changes from being less than the second distance to being equal to the second distance, that is, the distance between the current terminal device and the reference position reaching the second distance can represent that the distance between the terminal device and the reference position dynamically changes to reach the second distance.

[0081] According to the above technical solution, the distance between the terminal device and the reference position reaching the second distance represents that the terminal device is located in a coverage range of a neighbor cell. In a case where the terminal device has acquired the second information, the terminal device can perform mobility management based on the second information, thereby avoiding the terminal device from searching for the neighbor cell in vain.

[0082] In a ninth aspect, a communication method is provided, which can be executed by a terminal device. Here, the terminal device can refer to the terminal device itself, or a processor, a module, a chip, or a chip system, etc. in the terminal device that implements the method, and the present application does not limit this.

[0083] The method comprises: receiving first information, the first information comprising a first time and a second distance; not performing a first operation according to the first time, the first operation being that the terminal device acquires second information; and performing a second operation according to the second distance, the second operation being that the terminal device performs mobility management using the acquired second information, wherein the first time is a time at which the terminal device acquires the second information, and the terminal device is located in a coverage range of a neighbor cell when a distance between the terminal device and a reference position in a service satellite coverage range is greater than or equal to the second distance.

[0084] It should be understood that the ninth aspect is similar to some of the above-mentioned first aspect to eighth aspect, and relevant content can be referred to the detailed description of the first aspect to the eighth aspect.

[0085] According to the method provided in the application, the terminal device does not perform acquisition of the second information according to the first time, thereby avoiding the terminal device from repeatedly acquiring the same second information and generating unnecessary resource consumption. In addition, the terminal device performs mobility management according to the second distance, so that the terminal device performs mobility management in the coverage range of the neighbor cell, thereby avoiding the terminal device from performing empty search on the neighbor cell.

[0086] In combination with the ninth aspect, in some possible implementation manners, the not performing the first operation according to the first time comprises:

[0087] The current time is greater than the first time, and the terminal device has acquired the second information, so the first operation is not performed.

[0088] Based on the above technical solution, it is assumed that the current time is greater than the first time, and the terminal device has acquired the second information, so the terminal device does not perform acquisition of the second information, thereby avoiding the terminal device from repeatedly acquiring the same second information and generating unnecessary resource consumption.

[0089] In combination with the ninth aspect, in some possible implementation manners, the performing the second operation according to the second distance comprises:

[0090] When the distance between the terminal device and the reference position reaches the second distance, and the terminal device has acquired the second information, the second operation is performed.

[0091] Based on the above technical solution, when the distance between the terminal device and the reference position reaches the second distance, it indicates that the terminal device is located in the coverage range of the neighbor cell. The terminal device has acquired the second information, so the terminal device performs mobility management, thereby avoiding the terminal device from performing empty search on the neighbor cell and reducing resource consumption of the terminal device.

[0092] In a tenth aspect, a communication method is provided, which can be performed by a terminal device. The terminal device can refer to the terminal device itself, or a processor, a module, a chip, or a chip system, etc. in the terminal device that implements the method, which is not limited in the present application.

[0093] The method comprises: receiving first information, the first information comprising a second distance; and performing a second operation according to the second distance, the second operation being mobility management performed by the terminal device using acquired second information, wherein the terminal device is located in a coverage range of a neighbor cell when a distance between the terminal device and a reference position in a coverage range of a serving satellite is greater than or equal to the second distance.

[0094] According to the method provided in the present application, the terminal device can determine the time for performing mobility management by the second distance, so that the terminal device performs mobility management at the right time, avoiding the terminal device performing mobility management when it is not in the coverage range of the neighbor cell, which causes resource waste of the terminal device in the cell search of the neighbor cell.

[0095] In some possible implementation manners in combination with the tenth aspect, the performing the second operation according to the second distance comprises:

[0096] When the distance between the terminal device and the reference position is greater than or equal to the second distance, and the terminal device has acquired the second information, the second operation is performed.

[0097] Based on the above technical solution, when the distance between the terminal device and the reference position is greater than or equal to the second distance, the terminal device performs mobility management, avoiding the terminal device performing mobility management after acquiring the second information and before being in the coverage range of the neighbor cell, which wastes the resource of the terminal device.

[0098] In an eleventh aspect, a communication method is provided, which can be performed by a terminal device. The terminal device can refer to the terminal device itself, or a processor, a module, a chip, or a chip system, etc. in the terminal device that implements the method, which is not limited in the present application.

[0099] The method comprises: receiving first information, the first information comprising a first distance and a second distance; performing a first operation according to the first distance, the first operation being that a terminal device acquires second information; and performing a second operation according to the second distance, the second operation being that the terminal device performs mobility management using the second information, wherein the time when the distance between the terminal device and a reference position in a service satellite coverage range is greater than or equal to the first distance is the time when the terminal device acquires the second information, and when the distance between the terminal device and the reference position is greater than or equal to the second distance, the terminal device is located in a coverage range of a neighbor cell.

[0100] It should be understood that the eleventh aspect is similar to some of the above-mentioned first aspect to tenth aspect, and relevant content can be referred to the detailed description of the above-mentioned first aspect to tenth aspect.

[0101] According to the method provided in the application, the terminal device acquires the second information according to the first distance, so that when the distance between the terminal device and the reference position reaches the first distance, the terminal device acquires the second information, avoiding the terminal device from acquiring the second information when the distance between the terminal device and the reference position is less than the first distance, thus avoiding the terminal device from performing a blind search on the second information. In addition, the terminal device performs mobility management according to the second distance in the first information, so as to ensure that the terminal device performs mobility management in the coverage range of the neighbor cell, thus avoiding the terminal device from performing mobility management immediately after acquiring the second information, thus avoiding the terminal device from performing a blind search on the resources generated by the neighbor cell when the terminal device is not in the coverage range of the neighbor cell.

[0102] In combination with the eleventh aspect, in some possible implementation manners, the performing the first operation according to the first distance comprises:

[0103] When the distance between the terminal device and the reference position reaches the first distance and the terminal device has not acquired the second information, the first operation is performed.

[0104] Based on the above technical solution, when the distance between the terminal device and the reference position reaches the first distance and the terminal device has not acquired the system message, the terminal device acquires the second information when the distance between the terminal device and the reference position reaches the first distance. Thus, the terminal device is prevented from performing a blind search on the second information, and the resource consumption of the terminal device is reduced.

[0105] In combination with the eleventh aspect, in some possible implementation manners, the performing the second operation according to the second distance comprises:

[0106] When the distance between the terminal device and the reference position reaches the second distance and the terminal device has acquired the second information, the second operation is performed.

[0107] Based on the above technical solution, when the distance between the terminal device and the reference position reaches the second distance, and the terminal device has acquired the second information, the terminal device is located in the coverage range of the neighboring cell, and the terminal device can perform mobility management based on the second information. Therefore, the terminal device avoids performing empty search on the neighboring cell, and the resource consumption of the terminal device is reduced.

[0108] In a twelfth aspect, a communication method is provided, which can be executed by a terminal device. The terminal device can refer to the terminal device itself, or a processor, a module, a chip, or a chip system, etc. in the terminal device that implements the method, which is not limited in the present application.

[0109] The method includes: receiving first information, the first information including a first distance and a second distance; not performing a first operation according to the first distance, the first operation being that the terminal device acquires second information; and performing a second operation according to the second distance, the second operation being that the terminal device performs mobility management using the second information, wherein the time when the distance between the terminal device and a reference position in the coverage range of a serving satellite is greater than or equal to the first distance is the time when the terminal device acquires the second information, and when the distance between the terminal device and the reference position in the coverage range of the serving satellite is greater than or equal to the second distance, the terminal device is located in the coverage range of a neighboring cell.

[0110] According to the method provided in the present application, the terminal device does not perform acquisition of the second information according to the first distance, thereby avoiding repeated acquisition of the same second information by the terminal device and unnecessary resource consumption. In addition, the terminal device performs mobility management according to the second distance in the first information, thereby ensuring that the terminal device performs mobility management in the coverage range of the neighboring cell and avoiding the terminal device performing mobility management immediately after acquisition of the second information, which results in resource consumption caused by empty search on the neighboring cell when the terminal device is not located in the coverage range of the neighboring cell.

[0111] In combination with the twelfth aspect, in some possible implementation manners, the not performing the first operation according to the first distance includes:

[0112] When the distance between the terminal device and the reference position is greater than the first distance, and the terminal device has acquired the second information, the first operation is not performed.

[0113] Based on the above technical solution, assuming that the distance between the terminal device and the reference position is greater than the first distance, and the terminal device has acquired the second information, the terminal device does not need to perform acquisition of the second information again, thereby avoiding repeated acquisition of the same second information by the terminal device and unnecessary resource consumption.

[0114] With reference to the twelfth aspect, in some possible implementation manners, the performing the second operation according to the second distance includes:

[0115] performing the second operation when the distance between the terminal device and the reference position reaches the second distance and the terminal device has acquired the second information.

[0116] According to the above technical solution, when the distance between the terminal device and the reference position reaches the second distance, it indicates that the terminal device is located in the coverage of the neighbor cell. The terminal device has acquired the second information, and thus the terminal device performs mobility management, avoiding the terminal device from performing empty search on the neighbor cell and reducing resource consumption of the terminal device.

[0117] The thirteenth aspect provides a communication method, which can be performed by a terminal device. The terminal device can refer to the terminal device itself, a processor, a module, a chip, or a chip system, etc. in the terminal device, which implement the method, and the present application does not limit this.

[0118] The method includes: receiving first information, the first information including a second distance;

[0119] performing a second operation according to the second distance, the second operation being mobility management performed by the terminal device using second information,

[0120] wherein when the distance between the terminal device and a reference position in a coverage of a serving satellite is greater than or equal to the second distance, the terminal device is located in a coverage of a neighbor cell.

[0121] According to the method provided in the present application, the terminal device can determine the time for performing mobility management by using the second distance, so that the terminal device performs mobility management at an accurate time, avoiding the terminal device from performing mobility management when it is not located in the coverage of the neighbor cell, which causes the terminal device to waste resource consumption in performing empty search on the neighbor cell.

[0122] With reference to the thirteenth aspect, in some possible implementation manners, the performing the second operation according to the second distance includes:

[0123] performing the second operation when the distance between the terminal device and the reference position is greater than or equal to the second distance and the terminal device has acquired the second information.

[0124] Based on the above technical solution, when the distance between the terminal device and the reference position is greater than or equal to the second distance, the terminal device performs mobility management, so as to avoid that the terminal device performs mobility management after obtaining the second information and before entering the coverage range of the neighboring cell, thereby wasting the resource consumption of the terminal device.

[0125] In a fourteenth aspect, a communication method is provided, which can be performed by a network device. The network device can refer to the first network device itself, or a processor, module, chip, or chip system, etc. in the first network device that implements the method, which is not limited in the present application. The method includes:

[0126] determining first information; and transmitting the first information, wherein the first information includes a first time and a second time; or the first information includes the first time; or the first information includes a first distance and the second time; or the first information includes the first time and a second distance; or the first information includes the first distance and the second distance; or the first information includes the second time; or the first information includes a second distance, the first time is a time at which the terminal device obtains second information, the second time is a time at which a neighboring cell starts to cover the terminal device, a time at which the distance between the terminal device and a reference position in a coverage range of a serving satellite is greater than or equal to the first distance is the time at which the terminal device obtains the second information, and the terminal device is located in the coverage range of the neighboring cell when the distance between the terminal device and the reference position is greater than or equal to the second distance.

[0127] It should be understood that the fourteenth aspect corresponds to the first aspect to the thirteenth aspect described above, and specific related descriptions and technical effects can be referred to the descriptions of the first aspect to the thirteenth aspect.

[0128] In combination with the fourteenth aspect, in some possible implementation manners, at least one of the first time, the second time, the first distance, and the second distance is determined according to ephemeris information.

[0129] In a fifteenth aspect, a communication apparatus is provided, which includes: a transceiver unit configured to receive first information, the first information including a first time and a second time; and a processing unit configured to perform a first operation according to the first time, the first operation being that a terminal device obtains second information; and the processing unit is further configured to perform a second operation according to the second time, the second operation being that the terminal device performs mobility management using the second information, wherein the first time is a time at which the terminal device obtains the second information, and the second time is a time at which a neighboring cell starts to cover the terminal device.

[0130] The transceiver unit can perform the receiving and / or transmitting processing in the first aspect, and the processing unit can perform the processing in the first aspect other than the transmitting and receiving.

[0131] It should be understood that the transceiver unit can also be used to perform the receiving and / or transmitting in the second aspect to the fourteenth aspect, and the processing unit can also be used to perform the processing in the second aspect to the fourteenth aspect other than the transmitting and receiving.

[0132] In a sixteenth aspect, the present application provides a communication apparatus, which comprises a processor configured to implement the method in any of the implementation manners of the first aspect to the fourteenth aspect. The processor is coupled to a memory configured to store instructions and data. When the processor executes the instructions stored in the memory, the method in any of the implementation manners of the first aspect to the fourteenth aspect can be implemented.

[0133] Optionally, the communication apparatus can further comprise a memory. Optionally, the memory can be coupled to the processor. Optionally, the communication apparatus can further comprise a communication interface configured to enable the apparatus to communicate with other devices. Exemplarily, the communication interface can be a transceiver, a hardware circuit, a bus, a module, a pin, or other types of communication interfaces.

[0134] In one example, the communication apparatus can be a network device, such as an access network device, or a device, a module, or a chip, etc. disposed in the network device, or a device capable of being used in matching with the network device.

[0135] In another example, the communication apparatus can be a terminal device, or a device, a module, or a chip, etc. disposed in the terminal device, or a device capable of being used in matching with the terminal device.

[0136] In a seventeenth aspect, the present application provides a communication system, which comprises at least one of a terminal device and a network device. The terminal device is configured to perform the method in any of the implementation manners of the first aspect to the thirteenth aspect, and the network device is configured to perform the method in any of the implementation manners of the fourteenth aspect.

[0137] In an eighteenth aspect, the present application further provides a computer program, which, when executed on a computer, causes the computer to perform the method in any of the implementation manners of the first aspect to the fourteenth aspect.

[0138] In a nineteenth aspect, the present application further provides a computer program product comprising instructions which, when executed on a computer, cause the computer to perform the method in any of the implementation manners of the first aspect to the fourteenth aspect.

[0139] In a twenty-first aspect, the present application provides a chip for reading a computer program stored in a memory, and performing the method in any of the implementations of the first aspect to the thirteenth aspect.

[0140] In a twenty-first aspect, the present application provides a chip for reading a computer program stored in a memory, and performing the method in any of the implementations of the first aspect to the thirteenth aspect.

[0141] In a twenty-second aspect, the present application provides a chip system including a processor for supporting a device to implement the method in any of the implementations of the first aspect to the fourteenth aspect.

[0142] In a possible design, the chip system further includes a memory for storing programs and data necessary for the device. The chip system can be composed of a chip, or contain a chip and other discrete devices.

[0143] In a twenty-third aspect, a communication device is provided, which is configured to perform the method provided in any of the first aspect to the fourteenth aspect. Specifically, the device can include units and / or modules for performing the method provided in any of the implementations of the first aspect to the fourteenth aspect, such as a processing unit and / or a communication unit.

[0144] In an implementation, the device is a communication apparatus (e.g., a terminal device, or a first network device). When the device is a communication apparatus, the communication unit can be a transceiver, or an input / output interface; and the processing unit can be at least one processor. Optionally, the transceiver can be a transceiver circuit. Optionally, the input / output interface can be an input / output circuit.

[0145] In another implementation, the device is a chip, a chip system or a circuit for a communication apparatus. When the device is a chip, a chip system or a circuit for a communication apparatus, the communication unit can be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or related circuitry, etc. on the chip, the chip system or the circuit; and the processing unit can be at least one processor, a processing circuit or a logic circuit, etc. BRIEF DESCRIPTION OF DRAWINGS

[0146] FIG. 1 is a schematic diagram of a communication system 100 applicable to the embodiments of the present application.

[0147] FIG. 2 is a schematic diagram of an application scenario suitable for embodiments of the present application.

[0148] FIG. 3 is a schematic diagram of another application scenario suitable for embodiments of the present application.

[0149] FIG. 4 is a schematic diagram of a satellite coverage area.

[0150] FIG. 5 is a schematic diagram of a broadcast system message.

[0151] FIG. 6 is a schematic diagram of a terminal device obtaining a system message.

[0152] FIG. 7 is a schematic diagram of another terminal device obtaining a system message.

[0153] FIG. 8 is a flowchart of a communication method according to an embodiment of the present application.

[0154] FIG. 9 is a schematic diagram of a communication apparatus 900 according to an embodiment of the present application.

[0155] FIG. 10 is a schematic diagram of a communication apparatus 1000 according to an embodiment of the present application. DETAILED DESCRIPTION

[0156] The technical solutions of the present application will be described below with reference to the accompanying drawings.

[0157] The technical solutions of the present application can be applied to satellite communication systems, high altitude platform (HAPS) communication, unmanned aerial vehicle (UAV) and other non-terrestrial network (NTN) systems, such as integrated communication and navigation (IcaN) systems, global navigation satellite systems (GNSS) and ultra-dense low earth orbit satellite communication systems, etc.

[0158] The satellite communication system can be integrated with a conventional mobile communication system. For example, the mobile communication system can be a 4th generation (4G) communication system (e.g., a long term evolution (LTE) system), a worldwide interoperability for microwave access (WiMAX) communication system, a 5th generation (5G) communication system (e.g., a new radio (NR) system), and a future mobile communication system, etc.

[0159] A satellite communication system includes user equipment (UE) and network equipment. The user equipment can also be referred to as user terminal, mobile station, etc. The network equipment can include one or more satellites and ground station equipment, which can also be referred to as core network equipment. The satellite can be a low earth orbit (LEO) satellite, a non-geostationary earth orbit (NGEO) satellite, etc. The satellite can provide communication services, navigation services, positioning services, etc. to terminal equipment through multiple beams. The satellite covers a service area using multiple beams, and different beams can communicate through one or more of time division, frequency division, and space division. The satellite communicates with the terminal equipment through broadcast communication signals, navigation signals, etc. The satellite can communicate with the ground station equipment wirelessly. The satellite mentioned in the embodiments of the present application can be a satellite base station, and can also include an orbiting receiver or repeater for relaying information, or a network side device carried on the satellite.

[0160] Referring to FIG. 1, FIG. 1 is a schematic diagram of a communication system 100 suitable for embodiments of the present application. As shown in FIG. 1, the satellite provides communication services to terminal equipment through multiple beams. In this scenario, the satellite is taken as a non-geostationary earth orbit (NGEO) satellite, and the satellite is connected to core network equipment. The satellite covers a service area using multiple beams, and different beams can communicate through one or more of time division, frequency division, and space division. The satellite provides communication and navigation services to terminal equipment through broadcast communication signals and navigation signals. The satellite mentioned in the embodiments of the present application can be a satellite base station, or a network side device carried on the satellite.

[0161] The satellite communication system includes a transmissive satellite architecture and a non-transmissive satellite architecture. Transmissive is also referred to as pipe-through forwarding transmission: that is, the signal only undergoes frequency conversion on the satellite, and processes such as signal amplification, and the satellite is transparent to the signal, as if it does not exist. Non-transmissive is also referred to as regenerative (onboard access / processing) transmission: that is, the satellite has partial or full base station functions.

[0162] The terminal device mentioned in the embodiments of the present application includes various handheld devices, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems with communication functions, and can specifically refer to user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device can also be a satellite phone, a cellular phone, a smart phone, a wireless data card, a wireless modem, a machine type communication device, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device or a wearable device, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in self driving, a wireless terminal in remote medical, a wireless terminal in smart grid, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, a terminal device in 5G network or future communication network, etc.

[0163] The ground station device is, for example, a device in a core network (CN) of an existing mobile communication architecture (such as a 3GPP access architecture of a 5G network) or a device in a core network of a future mobile communication architecture. The core network provides an interface to a data network as a bearer network, provides a user equipment (UE) with communication connection, authentication, management, policy control, and bearer completion for data services. The CN can further include an access and mobility management network element (AMF), a session management network element (SMF), an authentication server network element (AUSF), a policy control node (PCF), a user plane function network element (UPF), and the like. The AMF network element is used to manage the access and mobility of the UE, and is mainly responsible for the authentication of the UE, the mobility management of the UE, and the paging of the UE.

[0164] The network device can also include, but is not limited to, an evolved node B (eNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP), or a transmission reception point (TRP), and the like. The network device can also be a gNB or a TRP or a TP in a 5G system, or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system. In addition, the network device can also be a network node constituting a gNB or a TP, such as a BBU, a distributed unit (DU), and the like. Alternatively, the network device can also be a device that undertakes a network side function in a device-to-device (D2D) communication system, a machine to machine (M2M) communication system, an Internet of Things (IoT), a vehicle-to-vehicle communication system, or other communication systems.

[0165] Referring to FIG. 2, FIG. 2 shows a schematic diagram of an application scenario of an embodiment of the present application. The scenario can be referred to as a "transparent satellite RAN architecture", or a "bent pipe" mode.

[0166] As shown in (a) of FIG. 2, the UE and the satellite, the satellite and the non-3GPP N3IWF+satellite hub communicate through a non-3GPP radio protocol, the N3IWF+satellite hub can be connected with a 5G CN through an NG interface (N2 / N3), and the 5G CN is connected with a DN through an N6 interface. As shown in (b) of FIG. 2, the UE and the satellite, the satellite and the gNB can communicate through an NR protocol. In this scenario, the satellite is used for frequency conversion and signal forwarding.

[0167] Referring to FIG. 3, FIG. 3 shows a schematic diagram of another application scenario of an embodiment of the present application. The scenario can be referred to as a "regenerative" mode. As shown in FIG. 3, in this scenario, the satellite is a DU (NG-RAN with a regenerative satellite based on gNB-DU), the UE and the satellite can communicate through an NR protocol, and the satellite and the gNB-CU are connected through an F1 interface.

[0168] It can be understood that the embodiments of the present application can also be applied to a scenario in which the satellite is an integrated access and backhaul (IAB).

[0169] It should be appreciated that satellite communication has its unique advantages compared to ground communication. For example, satellite communication can provide wider coverage; satellite base stations are not easily damaged by natural disasters or external forces. If satellite communication is introduced in future 5G communication, it can provide communication services for areas such as oceans and forests that cannot be covered by ground communication networks. Satellite communication can enhance the reliability of 5G communication, for example, to ensure that airplanes, trains, and users on these vehicles obtain better communication services. Satellite communication can provide more data transmission resources for 5G communication and improve network speed. Therefore, supporting both ground and satellite communication is an inevitable trend for future 5G communication, which has great benefits in terms of wide coverage, reliability, multi-connection, high throughput, and the like.

[0170] The biggest feature of satellite communication is large round-trip transmission delay, and terminal devices need to perform frequent beam and cell switching due to the movement of satellites. Therefore, the integration of satellites and 5G communication requires enhancements to existing 5G protocols to adapt to satellite communication.

[0171] Some technical terms related to the present application will be briefly introduced below.

[0172] 1. Satellite broadcast beam

[0173] In general, in a satellite communication system, a synchronization signal block (SSB) is transmitted to a terminal device by relying on a plurality of broadcast beams in different directions, and the SSB is used to synchronize with the terminal device in the initial access stage. Compared with ground networks, NTN has a wider coverage area, greater transmission loss, and faster movement, which are the distinctive features of NTN systems. Unlike the ground system, which defines a maximum of 8 SSBs (FR1) or 64 SSBs (FR2) corresponding to broadcast beams that can cover the service range of a single base station, the number of broadcast beams required by NTN systems can reach hundreds or even thousands. For example, in a NTN system with an orbital height of 600 km, the service range of a single satellite can reach hundreds of thousands of square kilometers. To overcome the path loss caused by transmission distance and ensure communication service quality, satellites generally use large-scale antenna arrays to provide higher array gain, but at the same time, the main lobe of the beam is narrower. For example, the coverage radius of a 3dB beam width is about tens of kilometers, and the coverage area is about a few hundred square kilometers, so using narrow beams to achieve seamless coverage of the service range of a single satellite requires thousands of beams. It can be seen that even if the beam is processed to a certain extent, in order to ensure the gain level, hundreds of beams are needed to achieve coverage.

[0174] The coverage position of the satellite beam covering the ground can be referred to as a region, which can be a geographical region or range, an administrative region or range, or a wave position, and the like. The wave position refers to the coverage range of the satellite wave position on the ground, or is described as the projection range of the beam on the ground. The satellite can point the beam transmitted by the satellite to different methods by moving or adjusting the weight of the antenna, so as to correspond to different coverage ranges. One wave position can be described by the geographical position of the beam center point and the coverage radius of the beam on the ground.

[0175] With the deployment of a large number of satellites, in order to improve the effectiveness and simplicity of satellite beam management, the ground operation and control center can divide the overall ground covered by the satellite into a plurality of regions with fixed sizes, each region corresponding to a wave position, and all regions can be assigned non-repeating numbers. The size of each region can be set to be the same as the coverage size of the SSB beam, facilitating periodic scanning by the satellite. The specific position and number of each region can be pre-stored in the satellite, terminal device, or ground network device, or can be periodically sent by the ground operation and control center or core network device. In a period of time, a satellite covers as many ground regions as the number of SSB beams, so there is a one-to-one mapping relationship between the SSB index and the ground region number. The mapping relationship can be maintained by the ground operation and control center and sent to one or more of the satellite, terminal device, ground network device, and core network device.

[0176] For example, the encoding of the region on the ground is 0-1023, and the satellite corresponds to 256 SSB beams with indexes 0-255, as shown in FIG. 4. The 256 SSB beams can correspond to 256 regions on the ground one by one, or can be understood as the 256 SSB beams can correspond to 256 wave positions one by one. In the embodiment of the present application, the wave position level is used for description.

[0177] 2. System message

[0178] Currently, in the NR NTN protocol, the base station mainly broadcasts system messages to the terminal device by using different directional beams to scan in time, and sends the configuration of the network device to the terminal device within the coverage range.

[0179] It should be understood that the system message broadcast by the network device to the terminal device can be divided into: master information block (MIB), system message block 1 (SIB1), and other system messages (OSI).

[0180] Wherein, the MIB is a system message that the terminal device needs to obtain after completing cell search and frequency / time synchronization. The MIB is generally broadcast through a broadcast channel (BCH), and the BCH and a primary synchronization signal (PSS) or a secondary synchronization signal (SSS) are combined together and collectively referred to as a synchronization signal and block (SS Block or SSB). Since the first four parameters included in the MIB are necessary for the terminal device in the random access process, the MIB is a system message that must be broadcast.

[0181] Wherein, the SIB1 is generally broadcast in the PDSCH, and the SIB1 generally includes an access permission of the service satellite and defines a scheduling indication of the OSI, etc. Wherein, the SIB1 can also refer to unified configuration information of the service satellite, for example, the configuration information can include at least one of uplink frequency point information, downlink frequency point information, initial bandwidth BWP, SSB transmission period and transmission index, etc. It can be seen that the SIB1 is a system message that must be broadcast, and the terminal device needs to communicate with the network based on the information in the SIB1.

[0182] Wherein, the OSI generally refers to other types of SIBs other than the SIB1, and the other types of SIBs can be collectively referred to as OSI. For example, the OSI can include SIB2-SIB21. In the NTN scenario, the commonly used and slightly different OSI from the ground cellular network mainly includes SIB2, SIB4 and SIB19. The SIB2 / 4 contains information related to inter-frequency / intra-frequency cell reselection, for example, including measured frequency points, signal strengths, service satellite measurement window configurations, such as SSB-based measurement timing configurations (SMTC), and adjacent satellite measurement window configurations smtc4, etc. The SIB19 is a newly added system message in the NTN scenario, and the SIB19 can include a plurality of auxiliary information of the NTN access satellite, such as service satellite configuration information, switching distance reference points and thresholds, and adjacent satellite configurations, etc. Wherein, the service satellite configuration information can include ephemeris information, timing advance (TA) information, cell-level offset (Koffset), epoch time, etc.

[0183] Generally, in the initial access procedure, the network device transmits a plurality of SSBs and a plurality of SIB1s corresponding to the plurality of SSBs. The SIB1 is a cell-level system message, and the contents carried by the SIB1 associated with different SSB indexes are consistent. In the initial access procedure, the network device can also broadcast OSI. The OSI can be carried in the same message as the SIB1 (for example, the OSI and the SIB1 form a new information for transmission) or in different messages.

[0184] In the current protocol, the network device mainly broadcasts the OSI to the terminal device by using beam time-sharing scanning of different methods. For example, the OSI can configure an SI window through SI-SchedulingInfo in the SIB1, and the SI message includes which SIBs, and the broadcasting / notBroadcasting type. When the terminal device needs a certain SIB, the terminal device needs to blind detect a PDCCH scrambled by an SI-RNTI in an SI window corresponding to an SI message corresponding to the SIB, and receive a specific SI message.

[0185] However, in order to flexibly adapt to the needs of different areas covered by beams and save signaling overhead, the network device can configure system messages (such as OSI and SIB1) of different granularities based on the beam coverage area.

[0186] Referring to FIG. 5, FIG. 5 is a schematic diagram of broadcasting system messages. As shown in FIG. 5, the network device carried on the satellite only broadcasts SIB2 / SIB4 and ephemeris information and the like for cell reselection / cell switching in the edge area of the beam coverage, so as to save the signaling overhead of the system messages. Generally, as shown in FIG. 5, different system messages are broadcasted according to the beam coverage area, and the system messages are beam-level system messages. It can be seen that the system messages broadcasted in different coverage areas can be different, and accordingly, the broadcasted OSI can also be referred to as a beam-level OSI.

[0187] Suppose that the OSI broadcasted by the network device is a beam-level OSI. The network device can indicate a distance threshold to the terminal device, and the distance threshold is used by the terminal device to determine an appropriate timing for acquiring the OSI. As shown in (a) of FIG. 5, suppose that the rectangle shown in (a) of FIG. 5 is a beam coverage area, and the gray area is an edge area of the beam coverage area. The network device can carry two distance thresholds in the ephemeris information: a horizontal distance threshold d_thr1 and a vertical distance threshold d_thr2. The horizontal distance threshold can refer to a minimum horizontal distance between a reference position of a satellite (or referred to as a serving satellite) carrying the network device and an edge beam broadcasting the OSI, and the vertical distance threshold can refer to a minimum vertical distance between the reference position of the serving satellite and the edge beam broadcasting the OSI.

[0188] It should be understood that, for the scenario of a ground moving cell, the serving satellite reference position can be the subsatellite point of the serving satellite; for the scenario of a ground fixed cell, the serving satellite reference position can be the center point of the ground coverage area. Generally, the terminal device determines the horizontal component and the vertical component of the distance between the terminal device and the serving satellite reference position according to the position where the terminal device is located and the ephemeris information, and further determines whether to start the acquisition of the OSI based on the horizontal component and the vertical component and the horizontal distance threshold and the vertical distance threshold. Assuming that the horizontal distance threshold and / or the vertical distance threshold are exceeded and the terminal device does not have a valid OSI, the terminal device starts the OSI acquisition process. The specific process of the terminal device acquiring the OSI is not limited in the present application.

[0189] Generally, the network device can also page to notify the OSI acquisition. For example, the content of the system message is updated, and the network device needs to notify the terminal device to update the system message. The system message update mechanism of NR can be performed through paging. The terminal device in the radio resource control (RRC) idle state and the RRC inactive state generally always monitors the paging opportunity that belongs to itself. The UE in the RRC connected state monitors all paging opportunities. If the network device needs to update the system message related to public safety, the public warning system (PWS) flag is generally included in the paging notification. The flag can make the terminal device immediately perform the system message acquisition process when receiving the system message update notification. Other system messages are generally acquired in the next system message update period, so as to keep time synchronization with the network device. The system message update period is generally an integer multiple of the discontinuous reception (DRX) period.

[0190] Based on the OSI transmission mode of wave bit level introduced in FIG. 5, it can be seen that the system messages broadcast in the edge region and the center region of the beam coverage area can be different, and the terminal device determines the opportunity to acquire the OSI based on the horizontal distance threshold and the vertical distance threshold configured by the network device. It can be seen that the terminal device may spend a long time searching for the OSI, or the acquired OSI is not the OSI updated by the network device, resulting in a large resource consumption of the terminal device, or the terminal device cannot start the measurement of the adjacent satellite at the appropriate time.

[0191] Referring to FIG. 6, which is a schematic diagram of terminal device obtaining system message. Assuming that the terminal device is located at wave position A, and the distance threshold d is used to determine whether the wave position where the terminal device is located is an overlapping coverage area, and the threshold for starting OSI acquisition, and the distance threshold from the satellite flight direction is used as an example, in the case where the terminal device does not move, the d is further used for determination. The time when the wave position A is located at the secondary edge wave position is t1, the time when the wave position A is located at the edge wave position is t2, in order to ensure that all terminal devices at the wave position A obtain that the wave position A is updated to the edge wave position at the time t2 (the time t2 can be understood as the time when the adjacent satellite arrives) before the time t2, and ensure a certain measurement redundancy to enable the terminal device to successfully acquire the OSI, then d < dmin.

[0192] Assuming that the time point when the network device broadcasts the updated OSI is t OSI , the time point when the wave position A is updated to the secondary edge wave position is t1, the time point when the wave position A is updated to the edge wave position is t2, and the time when the lower edge of the wave position A satisfies the distance threshold d is td. It can be seen from FIG. 7 that:

[0193] For case one: the updated OSI is issued in advance, and the terminal device at the lower edge of the wave position A starts to acquire the OSI at td. At the subsequent time t2, the wave position A becomes the edge wave position. It can be seen that the terminal device at the lower edge of the wave position A acquires the updated OSI at the time td, and since the adjacent satellite arrives at the time t2, the terminal device wastes the measurement overhead of the terminal device in the time period t2-td.

[0194] For case two: the terminal device at the lower edge of the wave position A starts to acquire the OSI at the time td, and since td OSI , at this time, the updated OSI has not been broadcast, therefore, the terminal device may search for the un-updated OSI but mistakenly think it is the updated OSI, or the terminal device may give up because it cannot search for the OSI, resulting in that the terminal device at the lower edge of the wave position A wastes the resource overhead of the terminal device in the time period t OSI -td.

[0195] For case three: since t2 < tosi, the terminal device starts to acquire the OSI after the adjacent satellite arrives, obviously, this scheme is not feasible, and the terminal device at the lower edge of the wave position A wastes the resource overhead of the terminal device in the time period t OSI -td.

[0196] It can be seen that the time for obtaining the OSI determined based on only the horizontal distance threshold and the vertical distance threshold described above can cause the terminal device to waste resources for a long time searching for the OSI or a long time searching for a neighbor star, or the neighbor star arrival time is before the terminal device obtains the OSI, causing the terminal device to be unable to perform neighbor star measurement at the neighbor star arrival time, affecting the communication performance of the terminal device. However, the current OSI acquisition by paging has the problem of large broadcast overhead of the network device.

[0197] The above problems are mainly caused by the fact that the terminal device and the network device do not align the understanding of the transmission time of the OSI, causing the terminal device to fail to obtain the OSI at the correct time and perform neighbor star measurement at the correct time. Therefore, in the NTN scenario, the terminal device needs to perceive the accurate time for the network device to update the OSI and perform neighbor star measurement based on the updated OSI, so as to reduce the meaningless search overhead and measurement overhead, and reduce the risk of inaccurate mobility judgment or cell reselection.

[0198] In view of this, the present application provides a communication method, mainly for the update indication of the OSI transmitted by wave position level, which can ensure that the terminal device starts to obtain the OSI at the correct time and measures the neighbor star at the correct time in the scenario where the wave position where the terminal device is located changes, thereby improving the accuracy of neighbor star switching and reducing the resource overhead of the terminal device and the network device.

[0199] In order to facilitate understanding of the embodiments of the present application, the following points are first explained.

[0200] Firstly, in the present application, "for indicating" can include direct indication and indirect indication. When describing that certain indication information is used to indicate A, it can include that the indication information directly indicates A or indirectly indicates A, and it does not mean that A must be carried in the indication information.

[0201] The information indicated by the indication information is referred to as the to-be-indicated information. In the specific implementation process, there are many ways to indicate the to-be-indicated information, for example, but not limited to, the to-be-indicated information can be directly indicated, such as the to-be-indicated information itself or the index of the to-be-indicated information. The to-be-indicated information can also be indirectly indicated by indicating other information, where the other information and the to-be-indicated information have an association relationship. The to-be-indicated information can also be indicated only by a part of the to-be-indicated information, and the other part of the to-be-indicated information is known or agreed in advance. For example, the indication of a specific information can also be achieved by means of the arrangement order of each information agreed in advance (for example, the protocol stipulates), thereby reducing the indication overhead to a certain extent. At the same time, the common part of each information can be identified and indicated uniformly, so as to reduce the indication overhead caused by separately indicating the same information.

[0202] Second, "at least one" in the present application refers to one or more, and "multiple" refers to two or more. In addition, in the embodiments of the present application, "first", "second", and various numbers (for example, "#1", "#2", and the like) are only for the convenience of description and do not limit the scope of the embodiments of the present application. The size of the serial number of each process below does not mean the order of execution, and the execution order of each process should be determined according to its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. It should be understood that the objects thus described can be interchanged under appropriate circumstances, so as to be able to describe solutions other than the embodiments of the present application. In addition, in the embodiments of the present application, the words such as "701" are only for the convenience of description and are not limited to the order of execution steps.

[0203] Third, in the embodiments of the present application, the words "exemplary" or "for example" are used to indicate an example, illustration or description. Any embodiment or design scheme described as "exemplary" or "for example" in the present application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of the words "exemplary" or "for example" is intended to present the relevant concept in a specific manner.

[0204] Fourth, in the embodiments of the present application, "saving" can refer to saving in one or more memories. The one or more memories can be separately provided or integrated in the encoder or decoder, processor, or communication device. The one or more memories can be partially separately provided and partially integrated in the decoder, processor, or communication device. The type of memory can be any form of storage medium, which is not limited in the present application.

[0205] Fifth, in the embodiments of the present application, "protocol" can refer to a standard protocol in the communication field, which can include new radio (NR) protocol and related protocols applied to future communication systems, which are not limited in the present application.

[0206] Sixth, in the embodiments of the present application, "of", "corresponding", "corresponding", and "associated" can be used interchangeably at times, and it should be pointed out that when the distinction is not emphasized, the meanings expressed are consistent.

[0207] Seventh, in the embodiments of the present application, "in the case of", "when", "if" can be used interchangeably at times, and it should be pointed out that when the distinction is not emphasized, the meanings expressed are consistent.

[0208] Eighth, the term "and / or" in this document is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in this document generally represents an "or" relationship between the associated objects before and after it.

[0209] Ninth, in the embodiments of the present application, the names of messages, devices, information, etc. are only examples, and the message names, device names, etc. in the present application are not limited in any way, as long as the corresponding functions can be implemented.

[0210] Tenth, in the present application, "sending" and "receiving" represent the direction of signal transmission. For example, "sending information to XX" can be understood as the destination of the information being XX, and "sending information" can include direct sending or indirect sending through other units or modules. "Receiving information from YY" can be understood as the source of the information being YY, and "receiving information" can include direct reception from YY or indirect reception from YY through other units or modules. In addition to air interface sending or air interface receiving signals implemented by network devices or terminal devices at the whole machine level, "sending" can also be understood as the "output" of the chip interface, and "receiving" can also be understood as the "input" of the chip interface. For example, a modem or a system-level chip (such as a system on a chip (SoC) chip or a system in package (SIP) chip) sends or receives signals. "Sending" or "receiving" can also be performed by device components, such as using buses, wires, or interfaces to send or receive signals through several parts, modules, chips of a device.

[0211] Referring to FIG. 8, FIG. 8 is a schematic flowchart of a communication method according to an embodiment of the present application. As shown in FIG. 8, the method can include the following steps:

[0212] 801, the network device sends first information, and correspondingly, the terminal device receives the first information.

[0213] It should be understood that the first information can be determined by the network device according to ephemeris information, and the network device is carried on a satellite that provides services for the terminal device. The first information can include a first time and / or a second time, or a first distance and a second time, or a first time and a second distance, or a second distance. The first time is less than the second time, and the time interval between the first time and the second time helps the terminal device to obtain the second information.

[0214] The first time and the first distance are used by the terminal device to determine whether to perform a first operation, which is to perform obtaining second information. The second information is used by the terminal device to perform mobility management. Mobility management can refer to a measurement procedure related to RRM, and a mobility signaling procedure triggered based on a measurement result. For example, the mobility management can include one or more of SSB-based mobility management, neighbor star measurement, or cell measurement. The mobility management can be described in detail in existing solutions, and will not be described here.

[0215] It is assumed that the second information is used by the terminal device to perform mobility management, and the mobility management includes cell measurement, which can include terminal device measurement on a serving cell and / or terminal device measurement on a neighbor cell (hereinafter referred to as a neighbor cell). The frequency corresponding to the neighbor cell and the serving cell that provides service to the terminal device can be the same, i.e., the neighbor cell and the serving cell are same-frequency cells; or the frequencies corresponding to the neighbor cell and the serving cell can be different, i.e., the neighbor cell and the serving cell are different-frequency cells; or the radio access technologies (RATs) corresponding to the neighbor cell and the serving cell can be different, which is not limited in the present application. For example, the RAT corresponding to the neighbor cell is LTE, and the RAT corresponding to the serving cell is NR.

[0216] It should be understood that the terminal device performing cell measurement can be understood as the terminal device being in the coverage of the neighbor cell, the terminal device performing cell measurement on the neighbor cell, or the terminal device performing cell measurement on the serving cell and the neighbor cell respectively. The terminal device performing the second operation can be understood as the terminal device performing a first measurement, which includes at least one of intra-frequency measurement, inter-frequency measurement, or inter-RAT measurement. It is assumed that the neighbor cell and the serving cell are same-frequency cells, i.e., the second operation can be understood as intra-frequency measurement; it is assumed that the neighbor cell and the serving cell are different-frequency cells, i.e., the second operation can be understood as inter-frequency measurement; and it is assumed that the neighbor cell and the serving cell correspond to different radio access technologies, i.e., the second operation can be understood as inter-RAT measurement.

[0217] The intra-frequency measurement can refer to a measurement performed by the terminal device on a downlink carrier frequency of the current serving cell. The intra-frequency measurement generally includes indicators such as received signal strength (e.g., reference signal received power) and received signal quality (e.g., reference signal received quality). The main purpose of the intra-frequency measurement can be to evaluate the signal strength and quality of the current serving cell, so as to trigger a handover process in time when the network condition deteriorates. The inter-frequency measurement can refer to a measurement performed by the terminal device on a downlink carrier frequency of a different frequency. The inter-frequency measurement can be performed by the terminal device supporting a multi-band network to evaluate the signal strength and quality on different frequency bands, so as to switch to a more suitable frequency band when needed. The inter-RAT measurement can refer to a measurement performed by the terminal device between different radio access technologies (such as long term evolution system and new radio system). The inter-RAT measurement can evaluate the signal strength and quality under different RATs, so as to switch between different networks when needed by the terminal device.

[0218] In the present application, the cell measurement performed by the terminal device can be understood as the terminal device performing a first measurement, which includes at least one of the intra-frequency measurement, the inter-frequency measurement, or the inter-RAT measurement. Assuming that the terminal device is located within the coverage range of the neighbor cell, the terminal device can perform cell measurement on the serving cell and the neighbor cell respectively, or the terminal device performs measurement on the neighbor cell. The neighbor cell can be a same-frequency cell as the serving cell, i.e., the measurement on the neighbor cell can be understood as the intra-frequency measurement. Alternatively, the neighbor cell can be a different-frequency cell from the serving cell, i.e., the measurement on the neighbor cell can be understood as the inter-frequency measurement. Alternatively, the neighbor cell corresponds to a different RAT from the serving cell, i.e., the measurement on the neighbor cell can be understood as the inter-RAT measurement.

[0219] It should be understood that the second information can be carried in the OSI transmitted by the network device, for example, the second information includes one or more of the following: configuration information of cell reselection, measurement configuration information of neighboring satellites, ephemeris information of neighbor satellites, or network configuration information of neighbor satellites. For example, the second information includes one or more of the SIB2, SIB4, or SIB19 in the above OSI.

[0220] It should also be understood that the first time is the time when the terminal device acquires the second information, and the second time is the time when the neighbor cell starts to cover the terminal device. The second time can also be understood as the time when the terminal device enters the coverage range of the neighbor cell. The time when the distance between the terminal device and the reference position within the coverage range of the serving satellite is greater than or equal to the first distance is the time when the terminal device acquires the second information. When the distance between the terminal device and the reference position within the coverage range of the serving satellite is greater than or equal to the second distance, the terminal device is located within the coverage range of the neighbor cell.

[0221] It should also be understood that the serving satellite refers to a satellite providing services for the terminal device, and the reference location can refer to a preset anchor point in the coverage of the serving satellite, or a center location of the coverage of the serving satellite, or a subsatellite point of the serving satellite, and the like. The reference location can be located in space or on the ground, which is not limited in the present application.

[0222] It should also be understood that the first information in step 801 can be carried in downlink signaling sent by the network device to the terminal device in the process of initial access of the terminal device, or the first information in step 801 can be sent by the network device to the terminal device through separate downlink signaling after the terminal device accesses the network device.

[0223] 802, the terminal device determines whether to perform the first operation or the second operation according to the first information.

[0224] For example, after the terminal device receives the first information, the terminal device determines whether to perform the first operation or the second operation according to the first information, and the current time and / or the distance between the current terminal device and the reference location of the serving satellite.

[0225] The following will be exemplarily described for different cases of the first information in combination with the following examples:

[0226] Example 1

[0227] The first information includes a first time and a second time. The terminal device determines whether to perform the first operation according to the first time, and determines whether to perform the second operation according to the second time.

[0228] Example 1.1, assuming that at t1 time, the terminal device receives the first information, the first time included in the first information is T1, the second time is T2, and t1 The terminal device receives the first information at time t1, t1

[0229] Among them, the network device can broadcast the second information for mobility management to the terminal device at T1 time or before T1 time.

[0230] It should be understood that the time at which the terminal device receives the first information is less than the first time and the second time included in the first information, the terminal device waits for the first time to arrive, and the terminal device performs the first operation at the first time. After the terminal device acquires the second information, the terminal device determines whether the second operation needs to be performed immediately based on the time at which the second information is acquired and the second time. It can be seen that the above example 1.1 can avoid the terminal device from performing a blind search on the second information, thereby reducing the resource consumption of the terminal device. In addition, the terminal device determines whether to perform the second operation immediately based on the relationship between the time at which the second information is acquired and the second time, thereby avoiding the terminal device from performing mobility management immediately after acquiring the second information, resulting in resource consumption of the terminal device performing a blind search on the neighbor cell when the terminal device is not in the coverage range of the neighbor cell.

[0231] In example 1.2, it is assumed that the terminal device receives the first information at time t1, the first time included in the first information is T1, and the second time is T2, and T1 < t1 < T2. The terminal device receives the first information at time t1, and T1 < t1. It can be understood that the terminal device is located at the edge of the coverage range of the serving satellite, or the terminal device is located in the coverage range of the serving satellite and has entered the coverage range of the neighbor cell, and the terminal device can receive the second information for mobility management broadcast by the network device. In the case of T1 < t1, the terminal device does not perform the first operation. It is assumed that the terminal device receives the second information broadcast by the network device at time t2, and t2 is less than T2, the terminal device waits for the current time to arrive T2, and performs the second operation; it is assumed that the terminal device receives the second information broadcast by the network device at time t2, and t2 is greater than or equal to T2, the terminal device performs the second operation immediately based on the second information.

[0232] It should be understood that the time at which the terminal device receives the first information is greater than the first time included in the first information and less than the second time, and the terminal device does not need to perform the first operation to acquire the second information, and can normally receive the broadcast message from the network device, which includes the second information. After the terminal device acquires the second information broadcast by the network device, the terminal device determines whether the second operation needs to be performed immediately based on the time at which the second information broadcast by the network device is acquired and the second time. It can be seen that the above example 1.2 can avoid the terminal device from repeatedly acquiring the second information, thereby reducing unnecessary resource consumption of the terminal device. In addition, the terminal device determines whether to perform the second operation immediately based on the relationship between the time at which the second information broadcast by the network device is acquired and the second time, thereby avoiding the terminal device from performing mobility management immediately after acquiring the second information, resulting in resource consumption of the terminal device performing a blind search on the neighbor cell when the terminal device is not in the coverage range of the neighbor cell.

[0233] Example 1.3, assuming that at time t1, the terminal device receives the first information, the first information including a first time T1 and a second time T2, T1 < T2 < t1. At time t1, T1 < t1, it can be understood that the terminal device is located at the edge of the coverage range of the serving satellite, or the terminal device is located in the coverage range of the serving satellite and has entered the coverage range of the neighboring cell, and the terminal device can receive the second information broadcast by the network device. In the case of T2 < t1, after the terminal device acquires the second information broadcast by the network device, the terminal device immediately performs the second operation.

[0234] It should be understood that the terminal device receives the first information at a time greater than the first time and the second time included in the first information, and the terminal device does not need to perform the first operation to acquire the second information, but can normally receive the second information broadcast from the network device. Since the terminal device receives the first information at a time greater than the second time, after the terminal device acquires the second information broadcast by the network device, the terminal device immediately performs mobility management based on the acquired second information. It can be seen that the above example 1.3 can avoid the terminal device repeatedly acquiring the second information for mobility management, resulting in unnecessary resource consumption of the terminal device.

[0235] It should also be understood that in this example 1.3, the first information can not include the first time, i.e., the first information includes the second time. The terminal device receives the first information at a time greater than the second time. Assuming that the terminal device receives the first information, the terminal device has acquired the second information for mobility management, and the terminal device immediately performs mobility management; and assuming that the terminal device receives the first information, the terminal device has not acquired the second information, and the terminal device waits to receive the second information broadcast from the network device, and after the terminal device receives the second information broadcast by the network device, the terminal device immediately performs mobility management.

[0236] Example 1.4, assuming that at time t1, the terminal device receives the first information, the first information including a first time T1 and a second time T2, t1 = T1 < T2. The terminal device receives the first information at time t1, and t1 = T1, and the terminal device immediately performs the first operation to acquire the second information. Assuming that the terminal device acquires the second information at time t2, and t2 is less than T2, the terminal device waits for the current time to reach T2 and performs the second operation; and assuming that the terminal device acquires the second information at time t2, and t2 is greater than or equal to T2, the terminal device immediately performs the second operation based on the acquired second information.

[0237] It should be understood that the time at which the terminal device receives the first information is equal to the first time included in the first information and less than the second time, and the terminal device receives the first information, and the terminal device immediately performs the obtaining of the second information. After the terminal device obtains the second information, the terminal device determines whether the second operation needs to be immediately performed based on the time at which the second information is obtained and the second time. It can be seen that the above example 1.4 can avoid the terminal device from performing a blind search on the second information, and reduce the resource consumption of the terminal device. In addition, the terminal device determines whether to immediately perform the second operation based on the relationship between the time at which the second information is obtained and the second time, thereby avoiding the terminal device from performing mobility management when the terminal device is not in the coverage range of the neighbor cell, resulting in resource consumption of the terminal device performing a blind search on the neighbor cell.

[0238] Example 1.5, assuming that at time t1, the terminal device receives the first information, the first time included in the first information is T1, and the second time is T2, and T1 < T2 = t1. The time at which the terminal device receives the first information is t1, and t1 = T2. It can be understood that the terminal device is located at the edge of the coverage range of the serving satellite, or the terminal device is located in the coverage range of the serving satellite and has entered the coverage range of the neighbor cell, and the terminal device can receive the second information broadcast by the network device. In the case where T2 is equal to t1, the terminal device does not need to perform the first operation, and the network device will broadcast the second information to the terminal device. After the terminal device receives the second information broadcast by the network device, the terminal device immediately performs the second operation.

[0239] It should be understood that in the case where the time at which the terminal device receives the first information is equal to the second time in the first information, it is assumed that before the terminal device receives the first information, the terminal device has received the second information broadcast by the network device, and the terminal device immediately performs the second operation. It is also assumed that when the terminal device receives the first information, the terminal device has not received the second information broadcast by the network device, and the terminal device immediately performs the second operation after receiving the second information broadcast by the network device. This method avoids the terminal device from repeatedly obtaining the second information, and reduces the resource consumption of the terminal device.

[0240] Example Two

[0241] The first information includes a first distance and a second time. The terminal device determines whether to perform the first operation according to the first distance, and determines whether to perform the second operation according to the second time.

[0242] In example 2.1, it is assumed that at time t1, the terminal device receives the first information, and at time t1, the distance between the terminal device and the reference position of the serving satellite is d1. The first information includes a first distance D1 and a second time T2, and d1 < D1 and t1 < T2. At time t1, d1 < D1, which means that the terminal device is located in the central area of the coverage of the serving satellite, or the terminal device has not entered the coverage of the neighboring cell. When the distance between the terminal device and the reference position does not reach D1, the terminal device can normally receive the broadcast message of the network device. With the movement of the serving satellite and / or the terminal device, the distance between the terminal device and the reference position can change, and when the distance between the terminal device and the reference position reaches D1, the terminal device performs the first operation to obtain the second information. It is assumed that the time when the terminal device obtains the second information is t2, and t2 is less than T2, and the terminal device waits until the current time reaches T2 to perform the second operation. It is assumed that the time when the terminal device obtains the second information is t2, and t2 is greater than or equal to T2, and the terminal device performs the second operation based on the obtained second information.

[0243] In the method, the network device can broadcast the second information to the terminal device before the distance between the terminal device and the reference position is less than or equal to D1.

[0244] It should be understood that when the terminal device receives the first information, the distance between the terminal device and the reference position is less than the first distance included in the first information, and the terminal device waits until the distance between the terminal device and the reference position reaches the first distance to perform obtaining the second information. After the terminal device obtains the second information, the terminal device determines whether the second operation needs to be performed immediately based on the time when the second information is obtained and the second time. It can be seen that the above example 2.1 can avoid the terminal device obtaining the second information when the distance between the terminal device and the reference position is less than the first distance, which leads to the terminal device searching for the second information in vain. In addition, the terminal device determines whether to perform the second operation immediately based on the relationship between the time when the second information is obtained and the second time, which avoids the terminal device performing the mobility management after obtaining the second information when the terminal device is not yet in the coverage of the neighboring cell, which leads to the resource consumption of the terminal device searching for the neighboring cell in vain.

[0245] In Example 2.2, it is assumed that the terminal device receives the first information at time t1, and the distance between the terminal device and the reference location of the serving satellite is d1 at time t1. The first information includes a first distance D1 and a second time T2, where D1 < d1 and t1 < T2. At time t1, d1 > D1, which means that the terminal device is located at the edge of the coverage range of the serving satellite, or the terminal device is located in the coverage range of the serving satellite and has entered the coverage range of the neighboring cell, and the terminal device can receive the second information broadcast by the network device. In the case of d1 > D1, the terminal device does not perform the first operation. After the terminal device receives the second information broadcast by the network device, the terminal device determines whether to immediately perform the second operation based on the relationship between the time of receiving the second information broadcast by the network device and the second time. It is assumed that the time of receiving the second information broadcast by the network device is t2, and t2 is less than T2, the terminal device waits until the current time reaches T2 to perform the second operation; and it is assumed that the time of receiving the second information broadcast by the network device is t2, and t2 is greater than or equal to T2, the terminal device immediately performs the second operation based on the obtained second information.

[0246] It should be understood that when the terminal device receives the first information, the distance between the terminal device and the reference location is greater than the first distance in the first information, and the terminal device does not need to perform the first operation, but can normally receive the second information broadcast by the network device. After the terminal device obtains the second information broadcast by the network device, the terminal device determines whether to immediately perform the second operation based on the time of obtaining the second information broadcast by the network device and the second time. It can be seen that the above-mentioned Example 2.2 can avoid the terminal device repeatedly obtaining the second information, thereby avoiding unnecessary resource consumption of the terminal device. In addition, the terminal device determines whether to immediately perform the second operation based on the relationship between the time of obtaining the second information broadcast by the network device and the second time, thereby avoiding the terminal device performing mobility management when the terminal device is not in the coverage range of the neighboring cell after obtaining the second information broadcast by the network device, thereby avoiding resource consumption of the terminal device performing cell search on the neighboring cell.

[0247] In Example 2.3, it is assumed that the terminal device receives the first information at time t1, and the first information can include a first distance D1 and a second time T2, where T2 < t1. At time t1, d1 > D1. The terminal device receives the first information at time t1, and T2 < t1, which means that the terminal device is located at the edge of the coverage range of the serving satellite, or the terminal device is located in the coverage range of the serving satellite and has entered the coverage range of the neighboring cell, and the terminal device can receive the second information broadcast by the network device. In the case of T2 < t1, the terminal device immediately performs the second operation after obtaining the second information broadcast by the network device.

[0248] It should be understood that the terminal device receives the first information at a time greater than the second time in the first information, and the terminal device does not need to perform the first operation to obtain the second information, but can normally receive the second information broadcast from the network device. Since the terminal device receives the first information at a time greater than the second time, after the terminal device obtains the second information broadcast by the network device, the terminal device immediately performs mobility management based on the obtained second information. It can be seen that the above example 2.3 can avoid the terminal device repeatedly obtaining the second information, resulting in unnecessary resource consumption of the terminal device.

[0249] It should also be understood that in this example 2.3, the first information can not include the first distance, that is, the first information includes the second time. The terminal device receives the first information at a time greater than the second time. Assuming that the terminal device receives the first information, the terminal device has obtained the second information, and the terminal device immediately performs mobility management; and assuming that the terminal device receives the first information, the terminal device has not obtained the second information, and the terminal device waits to receive the second information broadcast from the network device, and after the terminal device receives the second information broadcast from the network device, the terminal device immediately performs mobility management.

[0250] In example 2.4, it is assumed that at t1 time, the terminal device receives the first information, and at t1 time, the distance between the terminal device and the reference position of the service satellite is d1. The first information includes a first distance D1 and a second time T2, d1=D1, and t1T2. At t1 time, the distance between the terminal device and the reference position is equal to the first distance in the first information, and the terminal device immediately performs the first operation to obtain the second information. After the terminal device obtains the second information, the terminal device determines whether to immediately perform the second operation based on the relationship between the time when the terminal device obtains the second information and the second time. Assuming that the time when the terminal device obtains the second information is t2, and t2 is less than T2, the terminal device waits for the current time to reach T2 and performs the second operation; and assuming that the time when the terminal device obtains the second information is t2, and t2 is greater than or equal to T2, the terminal device immediately performs the second operation based on the obtained second information.

[0251] It should be understood that when the terminal device receives the first information, the distance between the terminal device and the reference position is equal to the first distance in the first information, and the terminal device immediately performs the first operation. After the terminal device acquires the second information, the terminal device determines whether the second operation needs to be immediately performed based on the time of acquiring the second information and the second time. It can be seen that the above example 2.4 can avoid the terminal device repeatedly acquiring the second information, thereby causing unnecessary resource consumption of the terminal device. In addition, the terminal device determines whether to immediately perform the second operation based on the relationship between the time of acquiring the second information and the second time, thereby avoiding the terminal device performing mobility management when the terminal device is not in the coverage range of the neighbor cell after acquiring the second information, thereby causing resource consumption of the terminal device to perform cell search on the neighbor cell.

[0252] In example 2.5, it is assumed that at time t1, the terminal device receives the first information, and at time t1, the distance between the terminal device and the reference position of the serving satellite is d1. The first information includes a first distance D1, a second time T2, D1 < d1, and T2 = t1. The terminal device receives the first information at time t1, and t1 = T2. It can be understood that the terminal device is located at the edge of the coverage range of the serving satellite, or the terminal device is located in the coverage range of the serving satellite and has entered the coverage range of the neighbor cell, and the terminal device can receive the second information broadcast by the network device. In the case where T2 is equal to t1, the terminal device does not need to perform the first operation, the network device broadcasts the second information to the terminal device, and after the terminal device receives the second information broadcast by the network device, the terminal device immediately performs the second operation.

[0253] It should be understood that the time when the terminal device receives the first information is equal to the second time in the first information. It is assumed that the terminal device receives the first information at the time, the terminal device has received the second information broadcast by the network device, and the terminal device immediately performs the second operation. It is also assumed that the terminal device receives the first information at the time, the terminal device does not receive the second information broadcast by the network device, and the terminal device immediately performs the second operation after receiving the second information broadcast by the network device. This method avoids the terminal device repeatedly acquiring the second information, thereby reducing the resource consumption of the terminal device.

[0254] Example Three

[0255] The first information includes a first time and a second distance. The terminal device determines whether to perform the first operation according to the first time, and determines whether to perform the second operation according to the second distance.

[0256] In example 3.1, it is assumed that at time t1, the terminal device receives the first information, and at time t1, the distance between the terminal device and the reference position of the serving satellite is d1. The first information includes a first time T1 and a second distance D2, and t1 < T1 and d1 < D2. The terminal device receives the first information at time t1, and t1 < T1, which can be understood as that the terminal device is located in the central region of the coverage range of the serving satellite at time t1, or the terminal device does not enter the coverage range of the neighboring cell. In the time period from t1 to T1, the terminal device can normally receive the broadcast message of the network device. As time changes, when the current time reaches T1, the terminal device performs the first operation to obtain the second information. It is assumed that when the terminal device obtains the second information, the distance between the terminal device and the reference position is d2, and d2 is less than D2. The terminal device waits until the distance between the terminal device and the reference position reaches D2, and then the terminal device performs the second operation based on the obtained second information. It is also assumed that when the terminal device obtains the second information, the distance d2 between the terminal device and the reference position is greater than or equal to D2. The terminal device immediately performs the second operation based on the obtained second information.

[0257] In the first information, the network device can broadcast the second information for mobility management to the terminal device at time T1 or before time T1.

[0258] It should be understood that the terminal device receives the first information at a time less than the first time included in the first information. The terminal device waits until the current time reaches the first time, and then the terminal device performs the first operation to obtain the second information. After the terminal device obtains the second information, the terminal device determines whether to immediately perform mobility management based on the obtained second information based on the distance between the current terminal device and the reference position and the second distance in the first information, so as to avoid the terminal device performing mobility management after obtaining the second information and the terminal device not being located in the coverage range of the neighboring cell, which causes resource overhead of the terminal device performing cell search on the neighboring cell.

[0259] Example 3.2, assuming that at time t1, the terminal device receives the first information, at time t1, the distance between the terminal device and the reference location of the serving satellite is d1. The first information includes a first time T1, and a second distance D2, where T1 < t1, and d1 < D2. The terminal device receives the first information at time t1, and t1 > T1, which can be understood as at time t1, the terminal device is located at the edge of the coverage range of the serving satellite, or the terminal device is located within the coverage range of the serving satellite and has entered the coverage range of the neighboring cell, and the terminal device can receive the second information broadcast by the network device. In the case where t1 is greater than T1, the terminal device does not perform the first operation. When the terminal device receives the second information broadcast by the network device, the distance between the terminal device and the reference location is d2, and the terminal device determines whether to immediately perform the second operation based on the relationship between d2 and D2. Assuming that d2 is less than D2, the terminal device does not immediately perform the second operation, but waits until the distance between the terminal device and the reference location reaches D2, and the terminal device performs the second operation. Assuming that d2 is greater than or equal to D2, the terminal device immediately performs the second operation.

[0260] It should be understood that the terminal device receives the first information at a time greater than the first time in the first information, and the terminal device does not need to perform the first operation, but can normally receive the second information broadcast from the network device. When the terminal device acquires the second information broadcast by the network device, the distance between the terminal device and the reference location is less than the second distance, and the terminal device does not immediately perform mobility management, but waits until the distance between the terminal device and the reference location reaches the second distance, and the terminal device performs mobility management. As can be seen, the above example 3.2 can avoid the terminal device repeatedly acquiring the second information, and the terminal device produces unnecessary resource overhead. In addition, the terminal device determines whether to immediately perform mobility management based on the second information based on the distance between the terminal device and the reference location and the second distance, which avoids the terminal device acquiring the second information and the terminal device not being located within the coverage range of the neighboring cell, and performing mobility management, resulting in resource overhead produced by the terminal device performing cell search on the neighboring cell.

[0261] Example 3.3, assuming that at time t1, the terminal device receives the first information, at time t1, the distance between the terminal device and the reference location of the serving satellite is d1. The first information includes a first time T1 and a second distance D2, and d1>D2. At time t1, the terminal device receives the first information, and at time t1, the distance between the terminal device and the reference location is d1>D2. It can be understood that at time t1, the terminal device is located at the edge of the coverage range of the serving satellite, or the terminal device is located in the coverage range of the serving satellite and has entered the coverage range of the neighboring cell, and the terminal device can normally receive the second information sent by the network device. In the case of d1>D2, after the terminal device obtains the second information of the network device, the terminal device immediately performs the second operation.

[0262] It should be understood that when the terminal device receives the first information, the distance between the terminal device and the reference location is greater than the second distance in the first information, and the terminal device does not need to perform the first operation to obtain the second information, but can normally receive the second information broadcast from the network device. Since, when the terminal device receives the first information, the distance between the terminal device and the reference location is greater than the second distance, after the terminal device obtains the second information broadcast by the network device, the terminal device immediately performs mobility management based on the obtained second information. It can be seen that the above example 3.3 can avoid the terminal device repeatedly obtaining the second information, and the terminal device produces unnecessary resource overhead.

[0263] It should also be understood that in this example 3.3, the first information can not include the first time, that is, the first information includes the second distance. When the terminal device receives the first information, the distance between the terminal device and the reference location is greater than the second distance. Assuming that the terminal device has obtained the second information, the terminal device receives the first information, and according to the second distance, the terminal device can immediately perform mobility management; again, assuming that the terminal device receives the first information, and the terminal device does not obtain the second information when receiving the first information, the terminal device waits to receive the second information broadcast from the network device, and after the terminal device receives the second information broadcast from the network device, the terminal device immediately performs mobility management.

[0264] Example 3.4, assuming that at time t1, the terminal device receives the first information, at time t1, the distance between the terminal device and the reference location of the serving satellite is d1. The first information includes a first time T1, and a second distance D2, and t1 = T1, and d1 < D2. At time t1, the terminal device receives the first information, and t1 = T1, the terminal device immediately performs the first operation to obtain the second information. Assuming that when the terminal device obtains the second information, the distance between the terminal device and the reference location is d2, and d2 is less than D2, the terminal device waits until the distance between the terminal device and the reference location reaches D2, and the terminal device performs the second operation based on the obtained second information; and assuming that when the terminal device obtains the second information, the distance d2 between the terminal device and the reference location is greater than or equal to D2, the terminal device immediately performs the second operation based on the obtained second information.

[0265] It should be understood that the time at which the terminal device receives the first information is equal to the first time included in the first information, and the terminal device immediately performs the first operation to obtain the second information. After the terminal device obtains the second information, the terminal device determines whether to immediately perform mobility management based on the obtained second information based on the distance between the current terminal device and the reference location and the second distance in the first information, so as to avoid the terminal device performing mobility management after obtaining the second information and the terminal device not being in the coverage range of the neighbor cell, resulting in resource overhead generated by the terminal device performing cell search on the neighbor cell.

[0266] Example 3.5, assuming that at time t1, the terminal device receives the first information, at time t1, the distance between the terminal device and the reference location of the serving satellite is d1. The first information includes a first time T1, and a second distance D2, and T1 < t1, and d1 = D2. At time t1, the terminal device receives the first information, and the distance between the terminal device and the reference location is equal to D2, which can be understood as the terminal device being located at the edge of the coverage range of the serving satellite, or the terminal device being located in the coverage range of the serving satellite and having entered the coverage range of the neighbor cell, and the terminal device being able to receive the second information broadcast by the network device. In the case of d1 = D2, the terminal device does not need to perform the first operation, and the network device will broadcast the second information to the terminal device, and after the terminal device receives the second information broadcast by the network device, the terminal device immediately performs the second operation.

[0267] It should be understood that when the terminal device receives the first information, the distance between the terminal device and the reference position is equal to the second distance included in the first information. Assuming that when the terminal device receives the first information, the terminal device has received the second information broadcast by the network device, the terminal device immediately performs the second operation; and assuming that when the terminal device receives the first information, the terminal device does not receive the second information broadcast by the network device, the terminal device performs the second operation immediately after receiving the second information broadcast by the network device. This method avoids the terminal device repeatedly obtaining the second information, and reduces the resource consumption of the terminal device.

[0268] Example Four

[0269] The first information includes the first distance and the second distance. The terminal device determines whether to perform the first operation according to the first distance, and determines whether to perform the second operation according to the second distance.

[0270] Example 4.1, assuming that at t1 time, the terminal device receives the first information, at this time, the distance between the terminal device and the reference position of the serving satellite is d1. The first information includes the first distance D1 and the second distance D2, and d1 < D1 < D2. When the terminal device receives the first information, d1 < D1, it can be understood that the terminal device is located in the central region of the coverage range of the serving satellite at t1 time, or the terminal device does not enter the coverage range of the neighboring cell. When the distance between the terminal device and the reference position does not reach D1, the terminal device can normally receive the broadcast message of the network device. With the movement of the serving satellite and / or the terminal device, the distance between the terminal device and the reference position is changing, when the distance between the terminal device and the reference position reaches D1, the terminal device performs the first operation to obtain the second information. Assuming that when the terminal device obtains the second information, the distance d2 between the terminal device and the reference position is less than D2, the terminal device waits until the distance between the terminal device and the reference position reaches D2, and then the terminal device performs the second operation based on the obtained second information; and assuming that when the terminal device obtains the second information, the distance d2 between the terminal device and the reference position is greater than or equal to D2, the terminal device immediately performs the second operation based on the obtained second information.

[0271] Wherein, the network device can broadcast the second information to the terminal device before the distance between the terminal device and the reference position is less than or equal to D1.

[0272] It should be understood that when the terminal device receives the first information, the distance between the terminal device and the reference position is less than the first distance included in the first information, and the terminal device waits until the distance between the terminal device and the reference position reaches the first distance, and then the terminal device performs the obtaining of the second information. After the terminal device obtains the second information, the terminal device determines whether to immediately perform mobility management based on the obtained second information based on the distance between the terminal device and the reference position at the time when the second information is currently obtained and the second distance in the first information, so as to avoid the terminal device performing mobility management after obtaining the second information and the terminal device not being in the coverage range of the neighbor cell, which causes resource consumption of the terminal device in the cell search of the neighbor cell.

[0273] In example 4.2, it is assumed that the terminal device receives the first information at t1, and the distance between the terminal device and the reference position of the serving satellite is d1 at this time. The first information includes a first distance D1 and a second distance D2, and D1 < d1 < D2. At t1, D1 < d1, which means that the terminal device is located at the edge of the coverage range of the serving satellite when the terminal device receives the first information, or the terminal device is located in the coverage range of the serving satellite and has entered the coverage range of the neighbor cell, and the terminal device can receive the second information broadcast by the network device. In the case of d1 > D1, the terminal device does not perform the first operation. When the terminal device receives the second information broadcast by the network device, the distance between the terminal device and the reference position is d2, and the terminal device determines whether to immediately perform the second operation based on the relationship between d2 and D2. It is assumed that d2 is less than D2, and the terminal device does not immediately perform the second operation, but waits until the distance between the terminal device and the reference position reaches D2, and then the terminal device performs the second operation. It is assumed that d2 is greater than or equal to D2, and the terminal device immediately performs the second operation.

[0274] It should be understood that when the terminal device receives the first information, the distance between the terminal device and the reference position is greater than the first distance in the first information, and the terminal device does not need to perform the first operation, but normally receives the second information broadcast by the network device. When the terminal device obtains the second information broadcast by the network device, the distance between the terminal device and the reference position is less than the second distance, and the terminal device does not immediately perform mobility management, but waits until the distance between the terminal device and the reference position reaches the second distance, and then the terminal device performs mobility management. It can be seen that the above example 4.2 can avoid the terminal device repeatedly obtaining the second information, and the terminal device generates unnecessary resource consumption. In addition, the terminal device determines whether to immediately perform mobility management based on the second information based on the distance between the terminal device and the reference position and the second distance, so as to avoid the terminal device not being in the coverage range of the neighbor cell after obtaining the second information, and performing mobility management, which causes the terminal device to perform cell search on the neighbor cell.

[0275] Example 4.3, assuming that at time t1, the terminal device receives the first information, at this time, the distance between the terminal device and the reference position of the serving satellite is d1. The first information includes a first distance D1 and a second distance D2, and D1 < D2 < d1. At time t1, the distance d1 between the terminal device and the reference position is greater than D2, which can be understood that at time t1, the terminal device is located at the edge area of the coverage range of the serving satellite, or the terminal device is located in the coverage range of the serving satellite and has entered the coverage range of the neighboring cell, and the terminal device can normally receive the second information broadcast by the network device. In the case of d1 > D2, after the terminal device acquires the second information broadcast by the network device, the terminal device immediately performs the second operation.

[0276] It should be understood that when the terminal device receives the first information, the distance between the terminal device and the reference position is greater than the second distance in the first information, and the terminal device does not need to perform acquisition of the second information, but can normally receive the second information broadcast from the network device. Since the distance between the terminal device and the reference position is greater than the second distance when the terminal device receives the first information, after the terminal device acquires the second information broadcast by the network device, the terminal device immediately performs mobility management based on the acquired second information. It can be seen that the above-mentioned example 4.3 can avoid the terminal device repeatedly acquiring the second information, and the terminal device generates unnecessary resource overhead.

[0277] It should also be understood that in this example 4.3, the first distance can not be included in the first information, that is, the first information includes the second distance. When the terminal device receives the first information, the distance between the terminal device and the reference position is greater than the second distance. Assuming that the terminal device has acquired the second information, the terminal device can immediately perform the second operation according to the second distance in the first information; again assuming that the terminal device receives the first information, and the terminal device does not acquire the second information when receiving the first information, the terminal device waits to receive the second information broadcast from the network device, and after the terminal device receives the second information broadcast by the network device, the terminal device immediately performs the second operation.

[0278] Example 4.4, assuming that at time t1, the terminal device receives the first information, at this time, the distance between the terminal device and the reference position of the serving satellite is d1. The first information includes a first distance D1 and a second distance D2, and d1=D1<D2. At time t1, the distance between the terminal device and the reference position is equal to the first distance in the first information, and the terminal device immediately performs the first operation to obtain the second information. Assuming that when the terminal device obtains the second information, the distance between the terminal device and the reference position is d2, and d2 is less than D2, the terminal device waits until the distance between the terminal device and the reference position reaches D2, and then the terminal device performs the second operation based on the obtained second information; and assuming that when the terminal device obtains the second information, the distance d2 between the terminal device and the reference position is greater than or equal to D2, the terminal device immediately performs the second operation based on the obtained second information.

[0279] It should be understood that when the terminal device receives the first information, the distance between the terminal device and the reference position is equal to the first distance in the first information, and the terminal device immediately performs the first operation. After the terminal device obtains the second information, the terminal device determines whether the second operation needs to be immediately performed based on the distance between the terminal device and the reference position when the terminal device obtains the second information and the second distance. It can be seen that the above example 4.4 can avoid the terminal device repeatedly obtaining the second information, thereby avoiding unnecessary resource consumption of the terminal device. In addition, the terminal device determines whether to immediately perform the second operation based on the relationship between the distance between the terminal device and the reference position when the terminal device obtains the second information and the second distance, thereby avoiding the terminal device performing mobility management when the terminal device is not in the coverage range of the neighbor cell after obtaining the second information, thereby avoiding resource consumption of the terminal device performing cell search on the neighbor cell.

[0280] Example 4.5, assuming that at time t1, the terminal device receives the first information, at this time, the distance between the terminal device and the reference position of the serving satellite is d1. The first information includes a first distance D1 and a second distance D2, and D1<D2=d1. At time t1 when the terminal device receives the first information, the distance between the terminal device and the reference position is equal to D2, which can be understood as that the terminal device is located at the edge of the coverage range of the serving satellite, or the terminal device is located in the coverage range of the serving satellite and has entered the coverage range of the neighbor cell, and the terminal device can receive the second information broadcast by the network device. In the case of d1 equal to D2, the terminal device does not need to perform the first operation, and the network device will broadcast the second information to the terminal device. After the terminal device receives the second information broadcast by the network device, the terminal device immediately performs the second operation.

[0281] It should be understood that when the terminal device receives the first information, the distance between the terminal device and the reference position is equal to the second distance included in the first information. Assuming that when the terminal device receives the first information, the terminal device has received the second information broadcast by the network device, the terminal device immediately performs the second operation; and assuming that when the terminal device receives the first information, the terminal device does not receive the second information broadcast by the network device, the terminal device performs the second operation immediately after receiving the second information broadcast by the network device. This method avoids the terminal device repeatedly acquiring the second information, and reduces the resource consumption of the terminal device.

[0282] Example Five

[0283] The first information includes a first time. The terminal device determines whether to perform the first operation according to the first time.

[0284] Example 5.1, assuming that at t1 time, the terminal device receives the first information, the first time included in the first information is T1, and t1

[0285] The network device can broadcast the second information to the terminal device at T1 time or before T1 time.

[0286] It should be understood that the terminal device receives the first information at a time less than the first time included in the first information, and the terminal device waits for the first time to arrive, and the terminal device performs the acquisition of the second information at the first time. This method can avoid the terminal device performing a blind search on the second information, and reduces the resource consumption of the terminal device.

[0287] Example 5.2, assuming that at t1 time, the terminal device receives the first information, the first time included in the first information is T1, and the second time is T2, and T1

[0288] It should be understood that the terminal device receives the first information at a time greater than the first time included in the first information, and the terminal device does not need to perform the obtaining of the second information, and can normally receive the second information broadcast by the network device. The method can avoid the terminal device repeatedly obtaining the second information, and cause unnecessary resource consumption of the terminal device.

[0289] Example 5.3, assuming that at time t1, the terminal device receives the first information, the first time included in the first information is T1, and the second time is T2, and t1=T1. The terminal device receives the first information at time t1, and t1=T1, and the terminal device immediately performs the first operation to obtain the second information.

[0290] It should be understood that the terminal device receives the first information at a time equal to the first time included in the first information, and the terminal device receives the first information, and the terminal device immediately performs the obtaining of the second information. The method can avoid the terminal device performing a blind search on the second information, and reduce resource consumption of the terminal device.

[0291] According to the method shown in FIG. 8, the terminal device can ensure obtaining the second information for mobility management at an accurate time based on the first information, and performing mobility management at a suitable time, avoiding the terminal device performing a blind search on the second information and a blind search on a neighbor cell, and causing resource waste of the terminal device.

[0292] It should be understood that the above FIG. 8 is an exemplary method diagram provided by the embodiments of the present application. Those skilled in the art can delete or adjust the steps included in the above FIG. 8, which all belong to the deformation of the embodiments of the present application, and the present application will not be illustrated one by one.

[0293] The method embodiments of the embodiments of the present application are described above in combination with the drawings, and the device embodiments of the embodiments of the present application are described below. It can be understood that the description of the method embodiments and the description of the device embodiments can correspond to each other, and therefore, the parts not described can be referred to the foregoing method embodiments.

[0294] It can be understood that the methods and operations implemented by the terminal device in each of the above method embodiments can also be implemented by components (such as chips or circuits) that can be used for the terminal device, and the methods and operations implemented by the network device can also be implemented by components (such as chips or circuits) that can be used for the network device.

[0295] It can be understood that the terms and / or descriptions of different embodiments are consistent and can be referred to each other if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0296] The above describes the scheme provided by the embodiments of the present application mainly from the perspective of the interaction between the network elements. It can be understood that each network element, such as a transmitting end device or a receiving end device, contains a hardware structure and / or a software module for performing each function in order to implement the above functions. Those skilled in the art should realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is implemented in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0297] The embodiments of the present application can divide the function modules of the transmitting end device or the receiving end device according to the above method examples. For example, each function module can be divided according to each function, or two or more functions can be integrated in one processing module. The above integrated module can be implemented in the form of hardware or a software function module. It should be noted that the division of the modules in the embodiments of the present application is illustrative, and is only a logical function division. Actual implementation can have another division manner. The following takes the division of each function module according to each function as an example for description.

[0298] FIG. 9 is a structural schematic diagram of a communication apparatus provided by an embodiment of the present application.

[0299] The apparatus 900 includes a transceiver unit 910 and a processing unit 920, wherein the transceiver unit 910 can be used to implement a corresponding communication function, and the processing unit 920 can be used for data processing.

[0300] Optionally, the transceiver unit 910 can also be referred to as a communication interface or a communication unit, and includes a sending unit and / or a receiving unit. The transceiver unit 910 can be a transceiver (including a transmitter and / or a receiver), an input / output interface (including an input and / or an output interface), a pin or a circuit, etc. The transceiver unit 910 can be used to perform the steps of sending and / or receiving in the above method embodiments.

[0301] Optionally, the processing unit 920 can be a processor (which can include one or more), a processing circuit with a processor function, etc., and can be used to perform other steps in the above method embodiments except for sending and receiving.

[0302] Optionally, the apparatus 900 further includes a storage unit, which can be a memory, an internal storage unit (e.g., a register, a cache, etc.), an external storage unit (e.g., a read-only memory, a random access memory, etc.), or the like. The storage unit is configured to store instructions, and the processing unit 920 executes the instructions stored in the storage unit to cause the communication apparatus to perform the above method.

[0303] In one design, the apparatus 900 can correspond to a terminal device in the above method embodiments, or be a component (e.g., a chip) of the terminal device.

[0304] The apparatus 900 can implement the steps or procedures performed by a terminal device in the above method embodiments, where the transceiver unit 910 can be configured to perform the transceiver-related operations of the terminal device in the above method embodiments, and the processing unit 920 can be configured to perform the operations inside the terminal device other than transceiver operations in the above method embodiments.

[0305] In one possible implementation, the transceiver unit 910 receives first information, where the first information includes a first time and a second time; and the processing unit 920 is configured to perform a first operation according to the first time, where the first operation is that the terminal device acquires second information; and the processing unit 920 is further configured to perform a second operation according to the second time, where the second operation is that the terminal device performs mobility management using the second information, where the first time is a time at which the terminal device acquires the second information, and the second time is a time at which a neighbor cell starts to cover the terminal device.

[0306] In one possible implementation, the transceiver unit 910 receives first information, where the first information includes a first time; and the processing unit 920 is configured to perform a first operation according to the first time, where the first operation is that the terminal device acquires second information for mobility management, where the first time is a time at which the terminal device acquires the second information.

[0307] In one possible implementation, the transceiver unit 910 receives first information, where the first information includes a first distance and a second time; and the processing unit 920 is configured to perform a first operation according to the first distance, where the first operation is that the terminal device acquires second information; and the processing unit 920 is further configured to perform a second operation according to the second time, where the second operation is that the terminal device performs mobility management using the second information, where a time at which a distance between the terminal device and a reference location within a coverage range of a serving satellite is greater than or equal to the first distance is a time at which the terminal device acquires the second information, and the second time is a time at which a neighbor cell starts to cover the terminal device.

[0308] In a possible implementation, the transceiver 910 receives first information, the first information comprising a first time and a second distance; and the processing unit 920 is configured to perform a first operation according to the first time, the first operation being that the terminal device acquires second information; and the processing unit 920 is further configured to perform a second operation according to the second distance, the second operation being that the terminal device performs mobility management using the second information, wherein the first time is a time at which the terminal device acquires the second information, and the terminal device is located in the coverage range of the neighbor cell when a distance between the terminal device and a reference location in a coverage range of a serving satellite is greater than or equal to the second distance.

[0309] In a possible implementation, the transceiver 910 receives first information, the first information comprising a first distance and a second distance; and the processing unit 920 is configured to perform a first operation according to the first distance, the first operation being that the terminal device acquires second information; and the processing unit 920 is further configured to perform a second operation according to the second distance, the second operation being that the terminal device performs mobility management using the second information, wherein a time at which the distance between the terminal device and a reference location in a coverage range of a serving satellite is greater than or equal to the first distance is the time at which the terminal device acquires the second information, and the terminal device is located in the coverage range of the neighbor cell when the distance between the terminal device and the reference location is greater than or equal to the second distance.

[0310] In another design, the apparatus 900 can correspond to a network device in the above method embodiments, or be a component (for example, a chip) of the network device.

[0311] In a possible implementation, the processing unit 920 is configured to determine first information, and the transceiver 910 is configured to send the first information, wherein the first information comprises a first time and a second time, or the first information comprises the first time, or the first information comprises a first distance and the second time, or the first information comprises the first time and a second distance, or the first information comprises the first distance and the second distance, or the first information comprises a second time, or the first information comprises a second distance, the first time being a time at which the terminal device acquires the system message, the second time being a time at which a neighbor cell starts to cover the terminal device, the time at which the distance between the terminal device and a reference location in a coverage range of a serving satellite is greater than or equal to the first distance being the time at which the terminal device acquires the system message, and the terminal device being located in a coverage range of a neighbor cell when the distance between the terminal device and the reference location is greater than or equal to the second distance.

[0312] The apparatus 900 can implement the steps or procedures performed by the network device or the terminal device in the above method embodiments, where the transceiver unit 910 can be configured to perform the transceiver-related operations of the network device or the terminal device in the above method embodiments, and the processing unit 920 can be configured to perform the operations inside the device other than the transceiver information of the network device or the terminal device in the above method embodiments.

[0313] When the apparatus 900 is configured to perform the method in FIG. 8, the transceiver unit 910 can be configured to perform the steps of transceiver information in the method, and the processing unit 920 can be configured to perform the steps inside the device other than the transceiver information in the method.

[0314] It should be understood that the specific process of each unit performing the corresponding steps is described in detail in the above method embodiments, and thus will not be repeated here for brevity.

[0315] It should also be understood that the apparatus 900 herein is embodied in the form of functional units. The term "unit" herein can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (such as a shared processor, a dedicated processor, or a group processor, etc.) and a memory for executing one or more software or firmware programs, a combination of logical circuit and / or other suitable components supporting the described functions. In an alternative example, those skilled in the art can understand that the apparatus 900 can be embodied as the network device in the above embodiments, and can be configured to perform the procedures and / or steps corresponding to the network device in the above method embodiments. To avoid repetition, details will not be repeated here.

[0316] The apparatus 900 of each of the above schemes has the function of implementing the corresponding steps performed by the device (such as the terminal device and the network device) in the above method. The function can be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions; for example, the transceiver unit can be replaced by a transceiver (for example, the transmitting unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as the processing unit, can be replaced by a processor, which respectively performs the transceiver operations and related processing operations in each of the method embodiments.

[0317] In addition, the transceiver unit 910 described above can also be a transceiver circuit (for example, which can include a receiving circuit and a transmitting circuit), and the processing unit can be a processing circuit.

[0318] It should be noted that the apparatus in FIG. 9 can be a network element or a device in the foregoing embodiments, or can be a chip or a chip system, for example, a system on chip (SoC). The transceiver unit can be an input / output circuit or a communication interface, and the processing unit can be a processor or a microprocessor integrated on the chip or an integrated circuit.

[0319] FIG. 10 is a structural schematic diagram of a communication apparatus 1000 provided by an embodiment of the present application. The communication apparatus 1000 shown in FIG. 10 includes a processor 1010, a memory 1020, and a transceiver 1030. The processor 1010 is coupled to the memory 1020, and is configured to execute instructions stored in the memory 1020 to control the transceiver 1030 to transmit and / or receive signals.

[0320] It should be understood that the processor 1010 and the memory 1020 described above can be combined into one processing apparatus, and the processor 1010 is configured to execute program codes stored in the memory 1020 to implement the above functions. In a specific implementation, the memory 1020 can be integrated in the processor 1010, or be independent of the processor 1010. It should be understood that the processor 1010 can also correspond to each processing unit in the communication apparatus described above, and the transceiver 1030 can correspond to each receiving unit and transmitting unit in the communication apparatus described above.

[0321] It should also be understood that the transceiver 1030 can include a receiver (or receiver) and a transmitter (or transmitter). The transceiver can further include an antenna, and the number of antennas can be one or more. The transceiver can also be a communication interface or an interface circuit.

[0322] Specifically, the communication apparatus 1000 can correspond to the device (terminal device, network device) in FIG. 9 according to the embodiments of the present application. The communication apparatus 1000 can include units of the method performed by the terminal device in FIG. 9, or units of the method performed by the network device. It should be understood that the specific processes of the units performing the above corresponding steps have been described in detail in the above method embodiments, and for brevity, will not be described here.

[0323] When the communication apparatus 1000 is a chip, the chip includes an interface unit and a processing unit. The interface unit can be an input / output circuit or a communication interface, and the processing unit can be a processor or a microprocessor integrated on the chip or an integrated circuit.

[0324] In the implementation process, the steps of the above method can be completed by the integrated logic circuit of hardware in the processor or the instruction in the form of software. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as hardware processor execution completion, or execution completion by hardware and software module combination in the processor. The software module can be located in the mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, register, etc. The storage medium is located in the memory, and the processor reads the information in the memory, and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.

[0325] It should be noted that the processor in the embodiments of the present application can be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the above method embodiments can be completed by the integrated logic circuit of hardware in the processor or the instruction in the form of software. The above processor can be a general processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The disclosed methods, steps and logic block diagrams in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as hardware decoding processor execution completion, or execution completion by hardware and software module combination in the decoding processor. The software module can be located in the mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register, etc. The storage medium is located in the memory, and the processor reads the information in the memory, and combines the hardware to complete the steps of the above method.

[0326] The present application also provides a computer readable medium having a computer program stored thereon, the computer program being executed by a computer to implement the functions of any of the above method embodiments.

[0327] The present application also provides a computer program product, which, when executed by a computer, implements the functions of any of the above method embodiments.

[0328] In the embodiments described above, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by software, all or part of the embodiments can be implemented 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, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transferred from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media sets. The available media can be magnetic media (such as floppy disk, hard disk, magnetic tape), optical media (such as high-density digital video disc (digital video disc, DVD)), or semiconductor media (such as solid state disk (solid state disk, SSD)) and the like.

[0329] Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Skilled professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0330] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0331] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other manners. For example, the described device embodiments are merely schematic. The division of the units is merely logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0332] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., can be located in one place, or can be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0333] In addition, each functional unit in the various embodiments of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit.

[0334] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various media that can store program codes.

[0335] The above is merely specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical scope disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0336] As used in this description, the terms "component," "module," "system", and the like are intended to refer to a computer-related entity, either hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and / or a computer. By way of illustration, both an application running on a computing device and the computing device can be a component. One or more components can reside within a process and / or thread of execution and a component can be localized, partially localized, and / or distributed across two or more computers. Also, these components can execute from various computer readable media having various data structures stored thereon. The components can communicate by way of local and / or remote processes such as in accordance with a signal having one or more data packets (e.g., data from one component interacting with another component in a local system, distributed system, and / or across a network such as the Internet with other systems via the signal).

[0337] Those skilled in the art can realize that the units and algorithm steps of each example described in connection with the embodiments disclosed herein can be realized in electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints. Those skilled in the art can realize the functions described in each example using a different method for each specific application, but such implementation should not be considered to be beyond the scope of the present application.

Claims

1. A communication method applied to a terminal device or a chip in the terminal device, characterized in that, The method comprises: receiving first information, the first information comprising a first time and a second time; performing a first operation according to the first time, the first operation being the terminal device acquiring second information; performing a second operation according to the second time, the second operation being the terminal device performing mobility management using the second information, wherein the first time is a time at which the terminal device acquires the second information, and the second time is a time at which a neighbor cell starts covering the terminal device.

2. The method of claim 1, wherein, The performing the first operation according to the first time comprises: when the current time reaches the first time and the terminal device has not acquired the second information, performing the first operation.

3. The method according to claim 1 or 2, characterized in that, The performing the second operation according to the second time comprises: when the current time reaches the second time, performing the second operation.

4. A communication method applied to a terminal device or a chip in the terminal device, characterized in that, The method comprises: receiving first information, the first information comprising a first time; performing a first operation according to the first time, the first operation being the terminal device acquiring second information for mobility management; wherein the first time is a time at which the terminal device acquires the second information.

5. The method of claim 4, wherein, The performing the first operation according to the first time comprises: when the current time reaches the first time and the terminal device has not acquired the second information, performing the first operation. 6.A communication method applied to a terminal device or a chip in the terminal device, comprising: The method comprises: receiving first information, the first information comprising a first distance and a second time; performing a first operation according to the first distance, the first operation being the terminal device acquiring second information, performing a second operation according to the second time, the second operation being the terminal device performing mobility management using the second information, wherein a time at which a distance between the terminal device and a reference position within a coverage range of a serving satellite is greater than or equal to the first distance is a time at which the terminal device acquires the second information, and the second time is a time at which a neighbor cell starts covering the terminal device.

7. The method of claim 6, wherein, The performing the first operation according to the first distance comprises: when the distance between the terminal device and the reference position reaches the first distance and the terminal device has not acquired the second information, performing the first operation.

8. The method according to claim 6 or 7, characterized in that, The performing the second operation according to the second time comprises: when the current time reaches the second time, performing the second operation. 9.A communication method applied to a terminal device or a chip in the terminal device, comprising: The method comprises: receiving first information, the first information comprising a first time and a second distance; performing a first operation according to the first time, the first operation being the terminal device acquiring second information; performing a second operation according to the second distance, the second operation being the terminal device performing mobility management using the second information, wherein the first time is a time at which the terminal device acquires the second information, and when a distance between the terminal device and a reference position within a coverage range of a serving satellite is greater than or equal to the second distance, the terminal device is located within a coverage range of a neighbor cell.

10. The method of claim 9, wherein, The performing the first operation according to the first time comprises: when the current time reaches the first time and the terminal device has not acquired the second information, performing the first operation.

11. The method according to claim 9 or 10, characterized in that, The second operation is performed according to the second distance, and the second operation is that the terminal device uses the second information to perform mobility management. The second operation is performed according to the second distance, and the second operation is that the terminal device uses the second information to perform mobility management.

12. A communication method applied to a terminal device or a chip in the terminal device, comprising: The method comprises: Receiving first information, the first information comprising a first distance and a second distance; The first operation is performed according to the first distance, and the first operation is that the terminal device acquires second information; The second operation is performed according to the second distance, and the second operation is that the terminal device uses the second information to perform mobility management, The first time is the time when the terminal device acquires the second information, the second information is used for mobility management, the second time is the time when a neighbor cell starts to cover the terminal device, the time when the distance between the terminal device and a reference position in a coverage range of a serving satellite is greater than or equal to the first distance is the time when the terminal device acquires the second information, and when the distance between the terminal device and the reference position is greater than or equal to the second distance, the terminal device is located in the coverage range of the neighbor cell.

13. The method of claim 12, wherein, The first operation is performed according to the first distance, and the first operation is that the terminal device acquires second information. The first operation is performed when the distance between the terminal device and the reference position is currently equal to the first distance and the terminal device has not acquired the second information.

14. The method according to claim 12 or 13, characterized in that, The second operation is performed according to the second distance, and the second operation is that the terminal device uses the second information to perform mobility management. The second operation is performed according to the second distance, and the second operation is that the terminal device uses the second information to perform mobility management.

15. A communication method applied to a network device or a chip of the network device, comprising: The method comprises: Determining first information; Sending the first information, The first information comprises a first time and a second time, or the first information comprises the first time, or the first information comprises a first distance and the second time, or the first information comprises the first time and a second distance, or the first information comprises the first distance and the second distance, or the first information comprises a second time, or the first information comprises a second distance, The first time is the time when the terminal device acquires second information, the second information is used for mobility management, the second time is the time when a neighbor cell starts to cover the terminal device, the time when the distance between the terminal device and a reference position in a coverage range of a serving satellite is greater than or equal to the first distance is the time when the terminal device acquires the second information, and when the distance between the terminal device and the reference position is greater than or equal to the second distance, the terminal device is located in the coverage range of the neighbor cell.

16. The method of claim 15, wherein, At least one of the first time, the second time, the first distance and the second distance is determined according to ephemeris information.

17. A communications device, characterized by The communication apparatus comprises units or modules for performing the method of any one of claims 1-3, 4-5, 6-8, 9-11, 12-14, 15-16.

18. A communications device, characterized by The apparatus comprises a processor configured to execute computer programs or instructions to cause the apparatus to perform the method of any one of claims 1-3, or to cause the apparatus to perform the method of any one of claims 4-5, or to cause the apparatus to perform the method of any one of claims 6-8, or to cause the apparatus to perform the method of any one of claims 9-11, or to cause the apparatus to perform the method of any one of claims 12-14, or to cause the apparatus to perform the method of any one of claims 15-16.

19. The apparatus of claim 18, wherein, The apparatus further comprises a memory configured to store the computer programs or instructions; and / or, The apparatus further comprises a communication interface coupled to the processor, the communication interface configured to input and / or output information.

20. A computer-readable storage medium, characterized in that, The computer programs or instructions are stored on the computer readable storage medium, The computer programs or instructions, when executed on the communication apparatus, cause the communication apparatus to perform the method of any one of claims 1-16.

21. A computer program product, characterised in that, The computer program product comprises the computer programs or instructions for performing the method of any one of claims 1-16.

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