WO2025065697A1 - Communication method, network device, communication system and storage medium - Google Patents

Abstract

Provided in the embodiments of the present disclosure are a communication method, a first service satellite access network device, a second service satellite access network device, a first core network device, a communication system and a storage medium. The method executed by the first service satellite access network device comprises: determining that a feeder link is interrupted, and storing first data, wherein the feeder link is a transmission link between the first service satellite access network device and a ground station, and the first data comprises user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device; determining whether the feeder link is restored, and obtaining a first determination result; and on the basis of the first determination result, transmitting the first data to the core network device, or transmitting the first data to the core network device by means of the second service satellite access network device, wherein the second service satellite access network device is a device which includes a feeder link between same and the ground station. In this way, a method for storing and forwarding user plane data and/or control plane data is specified.

Description

Communication method, network device, communication system and storage medium Technical Field

The present disclosure relates to the field of communication technology, and in particular to a communication method, a first service satellite access network device, a second service satellite access network device, a first core network device, a communication system and a storage medium.

Background Art

In the field of communication technology, a communication architecture with a wireless satellite-based base station (Satellite with RAN On-board) function has been introduced. In a network with a wireless satellite-based base station function, satellites are required to support data storage and forwarding to support delay-tolerant services. However, how to implement the storage and forwarding function is an issue that needs to be considered.

Summary of the invention

In a satellite network with onboard base station functions, it is not clear how to realize the satellite's data storage and forwarding functions.

The embodiments of the present disclosure provide a communication method, a first service satellite access network device, a second service satellite access network device, a first core network device, a communication system and a storage medium.

According to a first aspect of an embodiment of the present disclosure, a communication method is provided, the method being executed by a first serving satellite access network device, the method comprising:

Determine that a feeder link is interrupted, and store first data; wherein the feeder link is a transmission link between a first service satellite access network device and a ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device;

Determine whether the feeder link is restored to obtain a first determination result; based on the first determination result, transmit the first data to the core network device or transmit the first data to the core network device through the second service satellite access network device, where the second service satellite access network device is a device with a feeder link between the ground station.

According to a second aspect of an embodiment of the present disclosure, a communication method is provided, the method being executed by a second serving satellite access network device, the method comprising:

Receiving second information sent by the first core network device;

The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device.

According to a third aspect of an embodiment of the present disclosure, a communication method is provided, the method being performed by a first core network device, the method comprising:

The first core network device sends second information to the second service satellite access network device;

The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device.

According to a fourth aspect of an embodiment of the present disclosure, a communication method is provided, the method comprising:

The first service satellite access network device determines that the feeder link is interrupted, and the first service satellite access network device stores first data; wherein the feeder link is a transmission link between the first service satellite access network device and a ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device;

The first serving satellite access network device determines that the feeder link is restored, and the first serving satellite access network device transmits the first data to the core network device; or,

If the terminal switches from the first service satellite access network device to the second service satellite access network device, the first core network device sends second information to the second service satellite access network device, wherein the second information indicates the first service satellite access network device and the second information is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device.

According to a fifth aspect of an embodiment of the present disclosure, a first service satellite access network device is provided, wherein the first service satellite access network device includes:

The processing module is configured as follows:

Determine that a feeder link is interrupted, and store first data; wherein the feeder link is a transmission link between a first service satellite access network device and a ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device;

Determine whether the feeder link is restored to obtain a first determination result; based on the first determination result, transmit the first data to the core network device or transmit the first data to the core network device through the second service satellite access network device, where the second service satellite access network device is a device with a feeder link between the ground station.

According to a sixth aspect of an embodiment of the present disclosure, a second service satellite access network device is provided, wherein the second service satellite access network device includes:

The transceiver module is configured as follows:

Receiving second information sent by the first core network device;

The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device.

According to a seventh aspect of an embodiment of the present disclosure, a first core network device is provided, wherein the first core network device includes:

The transceiver module is configured as follows:

Sending second information to a second service satellite access network device;

The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second service satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device.

According to the eighth aspect of an embodiment of the present disclosure, a communication system is provided, wherein the communication system includes a first service satellite access network device, a second service satellite access network device and a first core network device; the first service satellite access network device is configured to implement the method described in the first aspect, the first service satellite access network device is configured to implement the method described in the second aspect, and the first core network device is configured to implement the method described in the third aspect.

According to a ninth aspect of an embodiment of the present disclosure, a first service satellite access network device is provided, wherein the first service satellite access network device includes:

one or more processors;

The first service satellite access network device is used to execute the method described in the first aspect.

According to a tenth aspect of an embodiment of the present disclosure, a second service satellite access network device is provided, wherein the second service satellite access network device includes:

one or more processors;

The second service satellite access network device is used to execute the method described in the first aspect.

According to an eleventh aspect of an embodiment of the present disclosure, a first core network device is provided, wherein the first core network device includes:

one or more processors;

The first core network device is used to execute the method described in the third aspect.

According to the twelfth aspect of an embodiment of the present disclosure, a storage medium is provided, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the method provided by the first aspect, the second aspect or the third aspect.

The technical solution provided by the embodiments of the present disclosure clarifies the storage and forwarding method of user plane and/or control plane data.

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

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the embodiments of the present invention.

FIG. 1a is a schematic diagram showing an architecture of a communication system according to an exemplary embodiment;

FIG1b is a schematic diagram of a communication system according to an exemplary embodiment;

FIG2a is a schematic flow chart of a communication method according to an exemplary embodiment;

FIG2b is a schematic flow chart of a communication method according to an exemplary embodiment;

Fig. 3a is a schematic flow chart of a communication method according to an exemplary embodiment;

Fig. 3b is a schematic flow chart of a communication method according to an exemplary embodiment;

FIG4a is a schematic flow chart of a communication method according to an exemplary embodiment;

Fig. 4b is a schematic flow chart of a communication method according to an exemplary embodiment;

Fig. 5a is a schematic flow chart of a communication method according to an exemplary embodiment;

Fig. 6a is a schematic flow chart showing a communication method according to an exemplary embodiment;

FIG7a is a schematic flow chart of a communication method according to an exemplary embodiment;

Fig. 7b is a schematic diagram of a communication system according to an exemplary embodiment;

Fig. 7c is a schematic flow chart of a communication method according to an exemplary embodiment;

FIG8a is a schematic structural diagram of a first service satellite access network device according to an exemplary embodiment;

FIG8b is a schematic structural diagram of a second service satellite access network device according to an exemplary embodiment;

FIG8c is a schematic structural diagram of a first core network device according to an exemplary embodiment;

FIG9a is a schematic diagram showing the structure of a UE according to an exemplary embodiment;

Fig. 9b is a schematic structural diagram of a communication device according to an exemplary embodiment.

DETAILED DESCRIPTION

The embodiments of the present disclosure provide a communication method, a first service satellite access network device, a second service satellite access network device, a first core network device, a communication system and a storage medium.

In a first aspect, an embodiment of the present disclosure provides a communication method, the method being executed by a first serving satellite access network device, the method comprising:

Determine that a feeder link is interrupted, and store first data; wherein the feeder link is a transmission link between a first service satellite access network device and a ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device;

Determine whether the feeder link is restored to obtain a first determination result; based on the first determination result, transmit the first data to the core network device or transmit the first data to the core network device through the second service satellite access network device, where the second service satellite access network device is a device with a feeder link between the ground station.

In the above embodiment, when it is determined that the feeder link is interrupted, the first data will be stored and can be transmitted to the core network device in a manner that matches the recovery of the feeder link, so that it can adapt to the recovery of the feeder link and reliably transmit the first data to the core network device using a transmission method that matches the feeder link.

In conjunction with some embodiments of the first aspect, in some embodiments,

The transmitting the first data to the core network device based on the first determination result or transmitting the first data to the core network device through the second serving satellite access network device comprises one of the following:

Determine that the feeder link is restored, and transmit the first data to the core network device;

Determine that during the interruption of the feeder link, the service satellite access network device of the terminal switches from accessing the first service satellite access network device to accessing the second service satellite access network device, and transmits the first data to the core network device through the second service satellite access network device.

In the above embodiment, the first data may be transmitted to the core network device through two different paths.

In combination with some embodiments of the first aspect, in some embodiments, the method further includes:

Restoring a first connection between the first serving satellite access network device and the first core network device;

Restoring a second connection between the first serving satellite access network device and the second core network device;

The transmitting the first data to the core network device includes at least one of the following:

Sending the control plane data to the first core network device through the first connection;

The user plane data is sent to the second core network device through the second connection.

In the above embodiment, control plane data may be sent through the restored first connection and user plane data may be sent through the restored second connection.

In combination with some embodiments of the first aspect, in some embodiments, the method further includes:

Establishing a third connection between the first serving satellite access network device and the second serving satellite access network device;

receiving first information sent by the second service satellite access network device; the first information is used to request to obtain the first data;

The transmitting the first data to the core network device through the second service satellite access network device includes:

The first data is sent to the second service satellite access network device through the third connection.

In the above embodiment, the first data can be sent to the second service satellite access network device through the established third connection, so that the second service satellite access network device can receive the first data and send the first data to the core network device.

In combination with some embodiments of the first aspect, in some embodiments, the first connection includes a first sub-connection; the first sub-connection is a connection between the first serving satellite access network device and the first proxy core network device; and restoring the first connection between the first serving satellite access network device and the first core network device includes:

The first sub-connection is restored.

In the above embodiment, when a first proxy core network device is arranged between the first service satellite access network device and the first core network device, the first connection can be restored by restoring the first sub-connection between the first service satellite access network device and the first proxy core network device.

In combination with some embodiments of the first aspect, in some embodiments, the second connection includes a third sub-connection; the third sub-connection is a connection between the first service satellite access network device and the first proxy access network device; and restoring the second connection between the first service satellite access network device and the second core network device includes:

The third sub-connection is restored.

In the above embodiment, when a first proxy access network device is arranged between the first service satellite access network device and the second core network device, the second connection can be restored by restoring the third connection between the first service satellite access network device and the first proxy access network device.

In a second aspect, an embodiment of the present disclosure provides a communication method, the method being executed by a second serving satellite access network device, the method comprising:

Receiving second information sent by the first core network device;

The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device.

In the above embodiment, the second information may be used to trigger the second satellite access network device to forward the first data stored in the first serving satellite access network device to the core network device.

In combination with some embodiments of the second aspect, in some embodiments, the second information includes an identifier of the first serving satellite access network device.

In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

Establishing a third connection between the first serving satellite access network device and the second serving satellite access network device;

Sending first information to the first service satellite access network device; the first information is used to request to obtain the first data;

Receive the first data sent by the first service satellite access network device.

In conjunction with some embodiments of the second aspect, in some embodiments, the method further includes:

Sending the control plane data to the first core network device through a fourth connection between the second serving satellite access network device and the first core network device;

The user plane data is sent to the second core network device through a fifth connection between the second service satellite access network device and the second core network device.

In combination with some embodiments of the second aspect, in some embodiments, the fourth connection includes a fifth sub-connection and a sixth sub-connection; the fifth sub-connection is a connection between the second service satellite access network device and the first proxy core network device, and the sixth sub-connection is a connection between the second proxy core network device and the first core network device.

In combination with some embodiments of the second aspect, in some embodiments, the fifth connection includes a seventh sub-connection and an eighth sub-connection; the seventh sub-connection is the connection between the second service satellite access network device and the first proxy access network device, and the eighth sub-connection is the connection between the first proxy access network device and the second core network device.

In a third aspect, an embodiment of the present disclosure provides a communication method, which is performed by a first core network device, and the method includes:

Sending second information to a second service satellite access network device;

The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device.

In combination with some embodiments of the third aspect, in some embodiments, sending the second information to the second service satellite access network device includes:

Determine that the service satellite access network device accessed by the terminal during the interruption of the feeder link is switched from accessing the first service satellite access network device to accessing the second service satellite access network device, and send the second information to the second service satellite access network device;

The feeder link is a transmission link between the first service satellite access network device and the ground station.

In combination with some embodiments of the third aspect, in some embodiments, the second information includes an identifier of the first serving satellite access network device.

In a fourth aspect, an embodiment of the present disclosure provides a communication method, the method comprising:

The first service satellite access network device determines that the feeder link is interrupted, and the first service satellite access network device stores first data; wherein the feeder link is a transmission link between the first service satellite access network device and a ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device;

The first serving satellite access network device determines that the feeder link is restored, and the first serving satellite access network device transmits the first data to the core network device; or,

If the terminal switches from the first service satellite access network device to the second service satellite access network device, the first core network device sends second information to the second service satellite access network device, wherein the second information indicates the first service satellite access network device and the second information is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device.

In a fifth aspect, an embodiment of the present disclosure provides a first service satellite access network device, wherein the first service satellite access network device includes:

The processing module is configured as follows:

Determine that a feeder link is interrupted, and store first data; wherein the feeder link is a transmission link between a first service satellite access network device and a ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device;

Determine whether the feeder link is restored to obtain a first determination result; based on the first determination result, transmit the first data to the core network device or transmit the first data to the core network device through the second service satellite access network device, where the second service satellite access network device is a device with a feeder link between the ground station.

In a sixth aspect, an embodiment of the present disclosure provides a second service satellite access network device, wherein the second service satellite access network device includes:

The transceiver module is configured as follows:

Receiving second information sent by the first core network device;

The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device.

In a seventh aspect, an embodiment of the present disclosure provides a first core network device, characterized in that the first core network device includes:

The transceiver module is configured as follows:

Sending second information to a second service satellite access network device;

The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device.

In the eighth aspect, the embodiment of the present disclosure provides that the communication system includes a first service satellite access network device, a second service satellite access network device and a first core network device; the first service satellite access network device is configured to implement the method described in the first aspect, the first service satellite access network device is configured to implement the method described in the second aspect, and the first core network device is configured to implement the method described in the third aspect.

In a ninth aspect, an embodiment of the present disclosure provides a first service satellite access network device, the first service satellite access network device comprising:

one or more processors;

Among them, the first service satellite access network device is used to execute the method provided by the first aspect.

In a tenth aspect, an embodiment of the present disclosure provides a second service satellite access network device, the second service satellite access network device comprising:

one or more processors;

Among them, the second service satellite access network device is used to execute the method provided by the first aspect.

In an eleventh aspect, an embodiment of the present disclosure provides a first core network device, the first core network device including:

one or more processors;

Among them, the first core network device is used to execute the method provided by the third aspect.

In the twelfth aspect, an embodiment of the present disclosure provides a storage medium, wherein the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the method described in the optional implementation of the first aspect, the second aspect and the third aspect.

In a thirteenth aspect, an embodiment of the present disclosure proposes a program product. When the program product is executed by a communication device, the communication device executes the method described in the optional implementation manner of the first aspect, the second aspect and the third aspect.

In a fourteenth aspect, an embodiment of the present disclosure proposes a computer program, which, when executed on a computer, enables the computer to execute the method described in the optional implementation of the first aspect, the second aspect, and the third aspect.

In a fifteenth aspect, an embodiment of the present disclosure provides a chip or a chip system. The chip or chip system includes a processing circuit configured to execute the method described in the optional implementation of the first aspect, the second aspect, and the third aspect.

It can be understood that the first service satellite access network device, the second service satellite access network device, the first core network device, the communication system, the storage medium, the program product, the computer program, the chip or the chip system are all used to execute the method proposed in the embodiment of the present disclosure. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method, which will not be repeated here.

The embodiments of the present disclosure provide a communication method, a first service satellite access network device, a second service satellite access network device, a first core network device, a communication system, and a storage medium. In some embodiments, the communication method and the information indication method, the information processing method, the information transmission method and other terms can be replaced with each other, and the communication system, the information processing system and other terms can be replaced with each other.

The embodiments of the present disclosure are not exhaustive, but are merely illustrative of some embodiments, and are not intended to be a specific limitation on the scope of protection of the present disclosure. In the event of a contradiction, each step in an embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined. For example, a solution after removing some steps in a certain embodiment can also be implemented as an independent embodiment, and the order of the steps in a certain embodiment can be arbitrarily exchanged. In addition, the optional implementation methods in a certain embodiment can be arbitrarily combined. In addition, the embodiments can be arbitrarily combined. For example, part or all of the steps of different embodiments can be arbitrarily combined, and a certain embodiment can be arbitrarily combined with the optional implementation methods of other embodiments.

In each embodiment of the present disclosure, unless otherwise specified or there is a logical conflict, the terms and/or descriptions between the embodiments are consistent and can be referenced to each other, and the technical features in different embodiments can be combined to form a new embodiment based on their internal logical relationships.

The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

In the embodiments of the present disclosure, unless otherwise specified, elements expressed in the singular form, such as "a", "an", "the", "above", "said", "aforementioned", "this", etc., may mean "one and only one", or "one or more", "at least one", etc. For example, when using articles such as "a", "an", "the" in English in translation, the noun after the article may be understood as a singular expression or a plural expression.

In the embodiments of the present disclosure, “plurality” refers to two or more.

In some embodiments, the terms "at least one of", "one or more", "a plurality of", "multiple", etc. can be used interchangeably.

In some embodiments, "at least one of A and B", "A and/or B", "A in one case, B in another case", "in response to one case A, in response to another case B", etc., may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, A and B (both A and B are executed). When there are more branches such as A, B, C, etc., the above is also similar.

In some embodiments, the recording method of "A or B" may include the following technical solutions according to the situation: in some embodiments, A (A is executed independently of B); in some embodiments, B (B is executed independently of A); in some embodiments, execution is selected from A and B (A and B are selectively executed). When there are more branches such as A, B, C, etc., the above is also similar.

The prefixes such as "first" and "second" in the embodiments of the present disclosure are only used to distinguish different description objects, and do not constitute restrictions on the position, order, priority, quantity or content of the description objects. The statement of the description object refers to the description in the context of the claims or embodiments, and should not constitute unnecessary restrictions due to the use of prefixes. For example, if the description object is a "field", the ordinal number before the "field" in the "first field" and the "second field" does not limit the position or order between the "fields", and the "first" and "second" do not limit whether the "fields" they modify are in the same message, nor do they limit the order of the "first field" and the "second field". For another example, if the description object is a "level", the ordinal number before the "level" in the "first level" and the "second level" does not limit the priority between the "levels". For another example, the number of description objects is not limited by the ordinal number, and can be one or more. Taking the "first device" as an example, the number of "devices" can be one or more. In addition, the objects modified by different prefixes may be the same or different. For example, if the description object is "device", then the "first device" and the "second device" may be the same device or different devices, and their types may be the same or different. For another example, if the description object is "information", then the "first information" and the "second information" may be the same information or different information, and their contents may be the same or different.

In some embodiments, “including A”, “comprising A”, “used to indicate A”, and “carrying A” can be interpreted as directly carrying A or indirectly indicating A.

In some embodiments, terms such as "in response to ...", "in response to determining ...", "in the case of ...", "at the time of ...", "when ...", "if ...", "if ...", etc. can be used interchangeably.

In some embodiments, terms such as "greater than", "greater than or equal to", "not less than", "more than", "more than or equal to", "not less than", "higher than", "higher than or equal to", "not lower than", and "above" can be replaced with each other, and terms such as "less than", "less than or equal to", "not greater than", "less than", "less than or equal to", "no more than", "lower than", "lower than or equal to", "not higher than", and "below" can be replaced with each other.

In some embodiments, devices and equipment may be interpreted as physical or virtual, and their names are not limited to the names recorded in the embodiments. In some cases, they may also be understood as "equipment", "device", "circuit", "network element", "node", "function", "unit", "section", "system", "network", "chip", "chip system", "entity", "subject", etc.

In some embodiments, "network" can be interpreted as devices included in the network, such as access network equipment, core network equipment, etc.

In some embodiments, "access network device (AN device)" may also be referred to as "radio access network device (RAN device)", "base station (BS)", "radio base station (radio base station)", "fixed station (fixed station)", and in some embodiments may also be understood as "node (node)", "access point (access point)", "transmission point (transmission point, TP)", "reception point (reception point, RP)", "transmission and/or reception point (transmission/reception point, TRP)", "panel (panel)", "antenna panel (antenna panel)", "antenna array (antenna array)", "cell (cell)", "macro cell (macro cell)", "small cell (small cell)", "micro cell (micro cell)" Femto cell", "pico cell", "sector", "cell group", "serving cell", "carrier", "component carrier", "bandwidth part (BWP)", etc.

In some embodiments, the term "terminal" or "terminal device" may be referred to as "user equipment (UE)", "user terminal (user terminal)", "mobile station (MS)", "mobile terminal (MT)", subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, etc.

In some embodiments, acquisition of data, information, etc. may comply with the laws and regulations of the country where the data is obtained.

In some embodiments, data, information, etc. may be obtained with the user's consent.

In addition, each element, each row, or each column in the table of the embodiments of the present disclosure may be implemented as an independent embodiment, and the combination of any elements, any rows, and any columns may also be implemented as an independent embodiment.

FIG. 1 a is a schematic diagram showing the architecture of a communication system according to an embodiment of the present disclosure.

As shown in FIG. 1 a , a communication system 100 includes a terminal 101 and a network device 102 .

In some embodiments, the network device 102 may include at least one of an access network device and a core network device.

In some embodiments, the terminal 101 includes, for example, a mobile phone, a wearable device, an Internet of Things device, a car with communication function, a smart car, a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, and at least one of a wireless terminal device in a smart home, but is not limited to these.

In some embodiments, the access network device may be, for example, a node or device that accesses a terminal to a wireless network. The access network device may include an evolved Node B (eNB), a next generation evolved Node B (ng-eNB), a next generation Node B (gNB), a node B (NB), a home node B (HNB), a home evolved node B (HeNB), a wireless backhaul device, a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a base band unit (BBU), a mobile switching center, a base station in a 6G communication system, an open base station (Open RAN), a cloud base station (Cloud RAN), a base station in other communication systems, and at least one of an access node in a Wi-Fi system, but is not limited thereto.

In some embodiments, the technical solution of the present disclosure may be applicable to the Open RAN architecture. In this case, the interfaces between access network devices or within access network devices involved in the embodiments of the present disclosure may become internal interfaces of Open RAN, and the processes and information interactions between these internal interfaces may be implemented through software or programs.

In some embodiments, the access network device may be composed of a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU), wherein the CU may also be called a control unit (control unit). The CU-DU structure may be used to split the protocol layer of the access network device, with some functions of the protocol layer being centrally controlled by the CU, and the remaining part or all of the functions of the protocol layer being distributed in the DU, and the DU being centrally controlled by the CU, but not limited to this.

In some embodiments, the core network device may be a device including one or more network elements, or may be multiple devices or device groups, each including all or part of the one or more network elements. The network element may be virtual or physical. The core network may include, for example, at least one of the Evolved Packet Core (EPC), the 5G Core Network (5GCN), and the Next Generation Core (NGC).

It can be understood that the communication system described in the embodiment of the present disclosure is for the purpose of more clearly illustrating the technical solution of the embodiment of the present disclosure, and does not constitute a limitation on the technical solution provided by the embodiment of the present disclosure. A person skilled in the art can know that with the evolution of the system architecture and the emergence of new business scenarios, the technical solution provided by the embodiment of the present disclosure is also applicable to similar technical problems.

The following embodiments of the present disclosure may be applied to the communication system 100 shown in FIG. 1a, or part of the subject, but are not limited thereto. The subjects shown in FIG. 1a are examples, and the communication system may include all or part of the subjects in FIG. 1a, or may include other subjects other than FIG. 1a, and the number and form of the subjects are arbitrary, and the connection relationship between the subjects is an example, and the subjects may be connected or disconnected. The connection can be in any form, direct or indirect, wired or wireless.

The embodiments of the present disclosure may be applied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond (LTE-B), SUPER 3G, IMT-Advanced, the fourth generation mobile communication system (4G), the fifth generation mobile communication system (5G), 5G new radio (NR), Future Radio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR), New radio access (NX), Future generation radio access ... The present invention relates to wireless communication systems such as LTE, Wi-Fi (X), Global System for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth (registered trademark), Public Land Mobile Network (PLMN) network, Device to Device (D2D) system, Machine to Machine (M2M) system, Internet of Things (IoT) system, Vehicle to Everything (V2X), systems using other communication methods, and next-generation systems expanded based on them. In addition, a combination of multiple systems (for example, a combination of LTE or LTE-A with 5G, etc.) may also be applied.

In some embodiments, see Figure 1b, if the satellite operates in regenerative mode, the satellite operates with a base station (gNB), and the satellite payload performs all or part of the functions of the gNB. The satellite radio interface transmits data of the N1, N2 or N3 interface between the ground fifth-generation mobile communication network core network (5GCN, 5G Core Network) and the onboard gNB.

In some embodiments, satellite connectivity may be intermittent, for example, non-geostationary orbit (NGSO) satellites are not always connected to the terrestrial network via a feeder link (between the satellite and the ground station) due to the limited number of ground stations. Therefore, a store and forward satellite service is proposed to support delay-tolerant communication services in satellite networks. The store and forward satellite operation enables the satellite to store data packets when the feeder link connection is interrupted and forward data packets when there is a connection to the terrestrial network.

In satellite networks, store and forward satellite operations are needed to support delay-tolerant services, but how to operate the store and forward function is an issue that needs to be considered.

FIG2a is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2a, the present disclosure embodiment relates to a communication method, which is used in a communication system 100, and the method includes:

Step S2101: the first service satellite access network device stores the first data;

In some embodiments, the feeder link is a transmission link between the first serving satellite access network device and the ground station.

In some embodiments, the ground station may be a processing device on the ground for user receiving and sending signals set up for satellite access network equipment.

In some embodiments, the first service satellite access network device is an access network device accessed by a terminal.

In some embodiments, the first serving satellite access network device is an access network device serving the terminal currently accessing.

In some embodiments, the satellite access network device (e.g., the first serving satellite access network device) may be a satellite with RAN On-board function, which may also be referred to as an integrated base station function.

Exemplarily, the satellite access network devices include SAT11 and SAT12. If the terminal accesses the network through SAT11, SAT11 is the first serving satellite access network device. If the terminal switches from accessing the network through SAT11 to accessing the network through SAT12 due to the movement of the satellite access network device relative to the ground, SAT12 is the second serving satellite access network device.

In some embodiments, the first data includes user plane data and/or control plane data transmitted between the first serving satellite access network device and the core network device. Exemplarily, the first data may be data sent by a terminal to a network.

In some embodiments, user plane (UP) data may be service data, and control plane (CP) data may be control signaling.

In some embodiments, the core network device can be a mobility management entity (MME), a serving gateway (S-GW) and/or a packet data gateway (P-GW, Packet Data Network Gateway).

In some embodiments, the core network device can be an access and mobility management function (AMF) or a user plane function (UPF).

Step S2102: The first service satellite access network device obtains a first determination result.

In some embodiments, the first service satellite access network device determines whether the feeder link is restored to obtain a first determination result.

In some embodiments, the feeder link recovery may be that the connection between the first service satellite access network device and the ground station is restored to enable normal communication.

In some embodiments, the first serving satellite access network device determines that the feeder link is restored, and the first determination result obtained indicates that the feeder link is restored.

In some embodiments, the first serving satellite access network device determines that the feeder link has not been restored, and the first determination result obtained indicates that the feeder link has not been restored.

Step S2103: The first service satellite access network device transmits the first data to the core network device or transmits the first data to the core network device through the second service satellite access network device.

In some embodiments, the second service satellite access network device is a device having a feeder link with a ground station.

In some embodiments, the second serving satellite access network device may be a satellite access network device having a routing function, and the first serving satellite access network device may be capable of performing a data forwarding function.

In some embodiments, the second serving satellite access network device may be a satellite access network device having a base station function, and the first serving satellite access network device may be able to perform the function of a base station.

In some embodiments, the first serving satellite access network device determines that the feeder link is restored, and the first serving satellite access network device transmits the first data to the core network device.

In some embodiments, the first service satellite access network device determines that during the interruption of the feeder link, the service satellite access network device of the terminal switches from accessing the first service satellite access network device to accessing the second service satellite access network device, and the first service satellite access network device transmits the first data to the core network device through the second service satellite access network device.

In some embodiments, the first satellite access network device restores the first connection between the first serving satellite access network device and the first core network device.

In some embodiments, the first satellite access network device restores the second connection between the first serving satellite access network device and the second core network device.

In some embodiments, the first core network device may be an MME or an AMF.

In some embodiments, the second core network device may be a GW or a UPF.

In some embodiments, the first connection may be S1-MME.

In some embodiments, the second connection may be S1-U.

In some embodiments, the first satellite access network device sends the control plane data to the first core network device through the first connection.

In some embodiments, the first satellite access network device sends the user plane data to the second core network device through the second connection.

In some embodiments, the first satellite access network device establishes a third connection between the first serving satellite access network device and the second serving satellite access network device.

In some embodiments, the third connection may be an X2 connection.

In some embodiments, the first satellite access network device receives first information sent by the second service satellite access network device; the first information is used to request to obtain the first data.

In some embodiments, the first satellite access network device sends the first data to the second serving satellite access network device via the third connection.

In some embodiments, the first connection includes a first sub-connection and a second sub-connection.

In some embodiments, the first sub-connection is a connection between the first serving satellite access network device and the first proxy core network device.

In some embodiments, the first proxy core network device may be a proxy of the MME, for example, a proxy MME.

In some embodiments, the first sub-connection may be S1-MME'. In some embodiments, the second sub-connection is a connection between the first proxy core network device and the first core network device.

In some embodiments, the second sub-connection may be S1-MME.

In some embodiments, restoring the first connection between the first serving satellite access network device and the first core network device includes: restoring the first sub-connection.

In some embodiments, the second connection includes a third sub-connection and a fourth sub-connection. In some embodiments, the third sub-connection is a connection between the first serving satellite access network device and the first proxy access network device.

In some embodiments, the third sub-connection may be S1-U’.

In some embodiments, the fourth sub-connection is a connection between the first proxy access network device and the second core network device.

In some embodiments, the first proxy access network device may be a proxy radio access network (RAN, Radio Access Network) node (Proxy RAN node) deployed near each satellite ground gateway. It may also be called a Proxy RAN node.

In some embodiments, the fourth sub-connection may be S1-U.

In some embodiments, the restoring the second connection between the first serving satellite access network device and the second core network device The method further comprises: restoring the third sub-connection.

In some embodiments, the term "information" can be interchangeably with terms such as "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "field", and "data".

In some embodiments, the term "send" can be interchangeable with terms such as "transmit", "report", and "transmit".

The information indication method involved in the embodiments of the present disclosure may include at least one of steps S2101 to S2103. For example, step S2101 may be implemented as an independent embodiment, step S2102 may be implemented as an independent embodiment, and step S2103 may be implemented as an independent embodiment. For example, step S2101 combined with step S2103 may be implemented as an independent embodiment, and step S2102 combined with step S2103 may be implemented as an independent embodiment, but is not limited thereto.

FIG2b is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG2b, the present disclosure embodiment relates to a communication method, which is used in a communication system 100, and the method includes:

Step S2201: The first core network device sends second information to the second service satellite access network device.

In some embodiments, the second service satellite access network device receives the second information sent by the first core network device.

In some embodiments, the first core network device determines that the service satellite access network device accessed by the terminal during the feeder link interruption is switched from accessing the first service satellite access network device to accessing the second service satellite access network device, and the first core network device sends the second information to the second service satellite access network device.

In some embodiments, the feeder link is a transmission link between the first service satellite access network device and the ground station.

In some embodiments, the second information indicates a first serving satellite access network device and the second information is used to trigger forwarding of the first data stored in the first serving satellite access network device to the core network device through the second satellite access network device.

In some embodiments, the first data includes user plane data and/or control plane data transmitted between the first serving satellite access network device and a core network device.

In some embodiments, the second information includes an identification of the first serving satellite access network device.

In some embodiments, the second service satellite access network device receives the second information sent by the terminal.

In some embodiments, after receiving the second information sent by the first core network device, the terminal sends a first message to the second service satellite access network device.

In some embodiments, a core network device (eg, a first core network device) may be referred to as a network element, a network function, or a network entity, etc., which is not limited herein.

Step S2202: The second service satellite access network device obtains the first data.

In some embodiments, a third connection between the first serving satellite access network device and the second serving satellite access network device is established.

In some embodiments, first information is sent to the first service satellite access network device based on the third connection; the first information is used to request to obtain the first data;

In some embodiments, the first data sent by the first serving satellite access network device is received.

Step S2203: The second service satellite access network device sends the first data to the core network device.

In some embodiments, the core network device receives first data sent by the second serving satellite access network device.

In some embodiments, the control plane data is sent to the first core network device via a fourth connection between the second serving satellite access network device and the first core network device.

In some embodiments, the user plane data is sent to the second core network device via a fifth connection between the second serving satellite access network device and the second core network device.

In some embodiments, the fourth connection may be S1-MME.

In some embodiments, the fifth connection may be S1-U.

In some embodiments, the fourth connection includes a fifth sub-connection and a sixth sub-connection.

In some embodiments, the fifth sub-connection may be S1-MME'.

In some embodiments, the sixth sub-connection may be S1-MME. In some embodiments, the fifth sub-connection is a connection between the second serving satellite access network device and the first proxy core network device.

In some embodiments, the sixth sub-connection is a connection between the first proxy core network device and the first core network device.

In some embodiments, the fifth connection includes a seventh sub-connection and an eighth sub-connection.

In some embodiments, the seventh sub-connection can be S1-U’.

In some embodiments, the eighth sub-connection may be S1-U.

In some embodiments, the seventh sub-connection is a connection between the second serving satellite access network device and the first proxy access network device.

In some embodiments, the eighth sub-connection is a connection between the second proxy access network device and the second core network device.

In some embodiments, the term "information" can be interchangeably with terms such as "message", "signal", "signaling", "report", "configuration", "indication", "instruction", "command", "channel", "parameter", "field", and "data".

In some embodiments, the term "send" can be interchangeable with terms such as "transmit", "report", and "transmit".

The information indication method involved in the embodiments of the present disclosure may include at least one of steps S2201 to S2203. For example, step S2201 may be implemented as an independent embodiment, step S2202 may be implemented as an independent embodiment, and step S2203 may be implemented as an independent embodiment. For example, step S2201 combined with step S2203 may be implemented as an independent embodiment, and step S2202 combined with step S2203 may be implemented as an independent embodiment, but is not limited thereto.

FIG3a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3a, the present disclosure embodiment relates to a communication method, which is executed by a first service satellite access network device, and the method includes:

Step S3101: store first data.

In some embodiments, the optional implementation of step S3101 can refer to the optional implementation of step S2101 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

Step S3102: Obtain a first determination result.

In some embodiments, the optional implementation of step S3102 can refer to the optional implementation of step S2102 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

Step S3103: Transmit the first data to the core network device or transmit the first data to the core network device through the second service satellite access network device.

In some embodiments, the optional implementation of step S3103 can refer to the optional implementation of step S2103 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

The information indication method involved in the embodiments of the present disclosure may include at least one of steps S3101 to S3103. For example, step S3101 may be implemented as an independent embodiment, step S3102 may be implemented as an independent embodiment, and step S3103 may be implemented as an independent embodiment. For example, step S3101 combined with step S3103 may be implemented as an independent embodiment, and step S3102 combined with step S3103 may be implemented as an independent embodiment, but is not limited thereto.

FIG3b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG3b, the present disclosure embodiment relates to a communication method, which is executed by a first service satellite access network device, and the method includes:

Step S3201: Determine that the feeder link is interrupted and store the first data; wherein the feeder link is a transmission link between the first service satellite access network device and the ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device.

In some embodiments, the optional implementation of step S3201 can refer to the optional implementation of step S2101 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

Step S3202: Determine whether the feeder link is restored, and obtain a first determination result.

In some embodiments, the optional implementation of step S3202 can refer to the optional implementation of step S2102 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

Step S3203: Based on the first determination result, the first data is transmitted to the core network device or the first data is transmitted to the core network device through the second service satellite access network device; the second service satellite access network device is a device with a feeder link between the ground station.

In some embodiments, the optional implementation of step S3203 can refer to the optional implementation of step S2103 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

In some embodiments, the transmitting the first data to the core network device based on the first determination result or transmitting the first data to the core network device through the second serving satellite access network device includes one of the following:

Determine that the feeder link is restored, and transmit the first data to the core network device;

Determine that during the interruption of the feeder link, the service satellite access network device of the terminal switches from accessing the first service satellite access network device to accessing the second service satellite access network device, and transmits the first data to the core network device through the second service satellite access network device.

In some embodiments, the method further comprises:

Restoring a first connection between the first serving satellite access network device and the first core network device;

Restoring a second connection between the first serving satellite access network device and the second core network device;

The transmitting the first data to the core network device includes at least one of the following:

Sending the control plane data to the first core network device through the first connection;

The user plane data is sent to the second core network device through the second connection.

In some embodiments, the method further comprises:

Establishing a third connection between the first serving satellite access network device and the second serving satellite access network device;

receiving first information sent by the second service satellite access network device; the first information is used to request to obtain the first data;

The transmitting the first data to the core network device through the second service satellite access network device includes:

The first data is sent to the second service satellite access network device through the third connection.

In some embodiments, the first connection includes a first sub-connection; the first sub-connection is a connection between the first serving satellite access network device and the first proxy core network device; and restoring the first connection between the first serving satellite access network device and the first core network device includes:

The first sub-connection is restored.

In some embodiments, the second connection includes a third sub-connection; the third sub-connection is a connection between the first service satellite access network device and the first proxy access network device; and restoring the second connection between the first service satellite access network device and the second core network device includes:

The third sub-connection is restored.

FIG4a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4a, the present disclosure embodiment relates to a communication method, which is executed by a second service satellite access network device, and the method includes:

Step S4101: Obtain second information.

In some embodiments, second information sent by the first core network device is received.

In some embodiments, the second service satellite access network device receives the second information sent by the first core network device, but is not limited to this, and may also receive the second information sent by other entities.

In some embodiments, the second serving satellite access network device obtains second information specified by the protocol.

In some embodiments, the second serving satellite access network device obtains the second information from an upper layer(s).

In some embodiments, the second service satellite access network device performs processing to obtain the second information.

In some embodiments, the optional implementation of step S4101 can refer to the optional implementation of step S2201 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

Step S4102: Obtain data.

In some embodiments, the optional implementation of step S4102 can refer to the optional implementation of step S2202 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

Step S4103: Send first data to the core network device.

In some embodiments, the optional implementation of step S4103 can refer to the optional implementation of step S2203 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

The information indication method involved in the embodiments of the present disclosure may include at least one of steps S4101 to S4103. For example, step S4101 may be implemented as an independent embodiment, step S4102 may be implemented as an independent embodiment, and step S4103 may be implemented as an independent embodiment. For example, step S4101 combined with step S4103 may be implemented as an independent embodiment, and step S4102 combined with step S4103 may be implemented as an independent embodiment, but is not limited thereto.

FIG4b is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4b, the present disclosure embodiment relates to a communication method, which is executed by a second service satellite access network device, and the method includes:

Step S4201: Receive second information sent by the first core network device.

In some embodiments, the second information indicates a first serving satellite access network device and the second information is used to trigger forwarding of the first data stored in the first serving satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first serving satellite access network device and the core network device.

In some embodiments, the optional implementation of step S4201 can refer to the optional implementation of step S2201 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

In some embodiments, the second information includes an identification of the first serving satellite access network device.

In some embodiments, the method further comprises:

Establishing a third connection between the first serving satellite access network device and the second serving satellite access network device;

Sending first information to the first service satellite access network device; the first information is used to request to obtain the first data;

Receive the first data sent by the first service satellite access network device.

In some embodiments, the method further comprises:

Sending the control plane data to the first core network device through a fourth connection between the second serving satellite access network device and the first core network device;

The user plane data is sent to the second core network device through a fifth connection between the second service satellite access network device and the second core network device.

In some embodiments, the fourth connection includes a fifth sub-connection and a sixth sub-connection; the fifth sub-connection is a connection between the second service satellite access network device and the first proxy core network device, and the sixth sub-connection is a connection between the second proxy core network device and the first core network device.

In some embodiments, the fifth connection includes a seventh sub-connection and an eighth sub-connection; the seventh sub-connection is a connection between the second service satellite access network device and the first proxy access network device, and the eighth sub-connection is a connection between the first proxy access network device and the second core network device.

FIG5a is a flow chart of a communication method according to an embodiment of the present disclosure. As shown in FIG4a, the present disclosure embodiment relates to a communication method, which is executed by a first core network device, and the method includes:

Step S5101: Send second information to the second service satellite access network device.

In some embodiments, the second information indicates a first serving satellite access network device and the second information is used to trigger forwarding of the first data stored in the first serving satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first serving satellite access network device and the core network device.

In some embodiments, the optional implementation of step S5101 can refer to the optional implementation of step S2201 in Figure 2a and other related parts of the embodiment involved in Figure 2a, which will not be repeated here.

In some embodiments, sending the second information to the second service satellite access network device includes:

Determine that the service satellite access network device accessed by the terminal during the interruption of the feeder link is switched from accessing the first service satellite access network device to accessing the second service satellite access network device, and send the second information to the second service satellite access network device;

The feeder link is a transmission link between the first service satellite access network device and the ground station.

In some embodiments, the second information includes an identification of the first serving satellite access network device.

FIG6a is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG6a, the present disclosure embodiment relates to a communication method, which is used in a communication system 100, and the method includes one of the following steps:

Step S6001: The first service satellite access network device determines that a feeder link is interrupted, and the first service satellite access network device stores first data; wherein the feeder link is a transmission link between the first service satellite access network device and a ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device;

The first serving satellite access network device determines that the feeder link is restored, and the first serving satellite access network device transmits the first data to the core network device; or,

If the terminal switches from the first service satellite access network device to the second service satellite access network device, the first core network device sends second information to the second service satellite access network device, wherein the second information indicates the first service satellite access network device and the second information is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device.

The optional implementation of step S6001 can refer to steps S2201 to S2103 in Figures 2a and 2b, the optional implementation of S2201 to S2203 and other related parts in the embodiment involved in Figure 2a, which will not be repeated here.

In some embodiments, the above method may include the methods of the above communication system side, the first service satellite access network equipment side, the second service satellite access network equipment side, the first core network equipment side, etc., which will not be repeated here.

In order to better understand the embodiments of the present disclosure, some exemplary embodiments are further described below:

The disclosed embodiments can solve the problem of how to forward data stored in a radio access network (RAN, Radio Access Network).

In some embodiments, the serving satellite eNB (corresponding to the serving satellite access network device) is configured to perform at least one of the following:

If the feeder link is restored, data or signaling is forwarded to the MME or S-GW;

If the serving satellite eNB changes during a feeder link outage, the following actions should be performed:

Receive the data forwarding indication and the satellite eNB identity (ID, Identity document). The satellite eNB ID is the ID of the satellite eNB that served the UE before the satellite was changed.

Initiate an X2 connection with the satellite eNB based on the id and indication;

Receive data forwarding from the satellite eNB and forward it to the MME or S-GW via the proxy satellite eNB.

In some embodiments, the MME is configured to perform at least one of the following:

When the MME acts as a proxy MME, it stores and updates the mapping relationship between the serving satellite eNB ID and the proxy satellite eNB ID.

In some embodiments, a data forwarding indication and a satellite eNB id are sent to the serving satellite eNB.

It should be noted that this solution is also applicable to the 5GS system. Therefore, MME can be replaced by AMF, MME agent can be replaced by AMF agent, and S-GW can be replaced by UPF, but it is not limited thereto.

Example 1:

A communication system is provided. SAT-11-eNB first acts as a serving eNB (first serving satellite access network device). When a UE accesses the network, the serving eNB (SAT-11-eNB) establishes an S1-MME connection with an MME and an S1-U connection with an S-GW. As time goes by, the SAT-11-eNB moves out of the coverage area of the UE, and at the same time, the SAT-12-eNB (second serving satellite access network device, which is a switched device) enters the coverage area and acts as the serving eNB of the UE. Please refer to FIG. 7a, which is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in FIG. 7a, an embodiment of the present disclosure relates to a communication method, and the method includes:

Step S6101: Execute the attachment procedure or IP-CAN session establishment. The UE accesses the EPC through the SAT-11-eNB, S1-MME connection, S1-U connection and S1 connection, and is established through the UE connection process and IP-CAN session establishment process. It is assumed that the satellite access (RAN node), UE and EPC support store and forward operations.

Step S6102: Store data or signaling. Due to the movement of satellites in the constellation and the limited number of deployed ground stations, the feeder link between the SAT-11-eNB and the ground station is interrupted, so the S1-MME connection and S1-U connection of the UE are interrupted accordingly. The serving eNB detects the feeder link interruption and enables the store and forward (S&F) operation. The SAT-11-eNB stores data (including user plane data and control plane data).

Next, the store-and-forward of SAT-11-eNB can be triggered in the following two cases:

Case 1:

1. SAT-11-eNB detects that the feeder link is restored and it still provides coverage to the UE.

2. SAT-11-eNB restores the S1-MME connection through MME and restores the S1-U connection through S-GW.

3. SAT-11-eNB forwards the stored signaling to MME and forwards the stored user plane data to S-GW via the feeder link.

Case 2:

Step S6103: When the feeder link is restored, the terminal accesses through the satellite or base station. During the interruption of the feeder link between the SAT-11-eNB and the ground station, the SAT-11-eNB moves out of the coverage area to the UE, and at the same time, the SAT-12-eNB moves into the coverage area and acts as a serving eNB. The UE updates its access to the Evolved Packet Core (EPC) via the SAT-12-eNB through the X2 handover process or the tracking area update process.

Step S6104: S1-MME or S1-U connection recovery. Based on step S6103, the MME determines that the serving eNB for the UE is changed from SAT-11-eNB to SAT-12-eNB. The MME notifies the serving eNB (SAT-12-eNB) that data forwarding should be performed. The data forwarding indication and the former serving eNB id (SAT-11-eNB id) should be sent to the current serving eNB (SAT-12-eNB). This can be achieved by the following two possible methods:

Option a: MME sends a message directly to the serving eNB (SAT-12-eNB) (corresponding to the first message), which includes the data forwarding indication and SAT-11-eNB id;

Option b: The MME sends a data forwarding indication and SAT-11-eNB id to the UE via a DL NAS message. After receiving the information, the UE sends a message containing the information to the serving eNB (SAT-12-eNB)

Step S6105: forwarding the stored data. Based on the indication and SAT-11-eNB id, SAT-12-eNB initiates X2 connection establishment with SAT-11-eNB and notifies SAT-11-eNB that data forwarding of UE should be started.

Step S6106: forwarding data. The stored UE data is forwarded by the SAT-11-eNB to the SAT-12-eNB and further forwarded to the S-GW. The stored signaling for the UE is forwarded by the SAT-11-eNB to the SAT-12-eNB and further forwarded to the MME.

In the embodiments of the present disclosure, part or all of the steps and their optional implementations may be arbitrarily combined with part or all of the steps in other embodiments, or may be arbitrarily combined with optional implementations of other embodiments.

Example 2:

Please refer to Figure 7b. In some embodiments, in order to reduce the frequency changes of S1-MME connection and S1-U connection caused by the change of serving satellite eNB, a proxy MME is introduced to alleviate the EPC's perception of frequency changes. The proxy MME is located near each satellite ground station. The MME stores the mapping between the service satellite eNB and the proxy serving satellite eNB. The MME establishes an S1-MME connection with the proxy serving satellite eNB of the UE. The proxy serving satellite eNB (proxy MME) establishes an S1-MME connection with the serving satellite eNB. Therefore, if the serving satellite eNB changes from SAT-11-eNB to SAT-12-eNB, only the S1-MME connection needs to be changed, that is, the connection change is terminated at the MME proxy, which avoids the EPC's perception of frequency changes. In this solution, the MME should store the mapping between the service satellite eNB and the proxy serving satellite eNB (corresponding to the first proxy access network device).

In some embodiments, SAT-11-eNB first acts as a serving eNB. When a UE accesses the network, the serving eNB (SAT-11-eNB) establishes an S1-MME' connection with the MME proxy and an S1-U' connection with the proxy serving satellite eNB (MME proxy). As time goes by, SAT-11-eNB moves out of the coverage area of the UE, and at the same time, SAT-12-eNB enters the coverage area and serves as the serving eNB of the UE. Please refer to Figure 7c, which is an interactive schematic diagram of a communication method according to an embodiment of the present disclosure. As shown in Figure 7c, an embodiment of the present disclosure relates to a communication method, and the above method includes:

Step S6201: Execute the attachment procedure or IP-CAN session establishment. The UE accesses the EPC through the SAT-11-eNB, and the S1-MME' connection, S1-MME connection, S1-U' connection, S1-U connection and S1 connection are established through the UE connection process and the IP-CAN session establishment process. It is assumed that the satellite access (RAN node), UE and EPC can support the store and forward operation.

The MME agent assigns a proxy satellite nNB to the UE and manages the mapping between the service satellite eNB ID (SAT-11-eNB ID) and the proxy satellite eNB ID.

Step S6202: Store data or signaling. Due to the movement of satellites in the constellation and the limited number of deployed ground stations, the feeder link between the SAT-11-eNB and the ground station is interrupted, so the S1-MME' connection and S1-U' connection of the UE are interrupted accordingly. The serving eNB detects the feeder link interruption and enables S&F operation. The SAT-11-eNB stores data (including user plane data and control plane signaling).

Next, the store-and-forward of SAT-11-eNB can be triggered in the following two cases:

Case 1:

The SAT-11-eNB detects that the feeder link is restored and it still provides coverage to the UE.

SAT-11-eNB restores the connection between S1-MME’ and MME and the connection between S1-U’ and S-GW.

The SAT-11-eNB forwards the stored signaling to the MME via the proxy satellite eNB, and forwards the stored user plane traffic to the S-GW via the proxy satellite eNB.

Case 2:

Step S6203: When the feeder link is restored, the terminal accesses through the satellite or base station. During the interruption of the feeder link between the SAT-11-eNB and the ground station, the SAT-11-eNB moves out of coverage to the UE, and instead, the SAT-12-eNB moves into coverage and acts as a serving eNB. The UE updates the connection to the EPC through the SAT-12-eNB. In this process, the MME agent updates the mapping information between the SAT-12-eNB ID and the proxy satellite eNB ID.

Step S6204: S1-MME or S1-U connection recovery. Based on step S6203, the MME agent determines that the serving eNB for the UE is changed from SAT-11-eNB to SAT-12-eNB. The MME agent notifies the serving eNB (SAT-12-eNB) that data forwarding should be enforced. The data forwarding indication and the former serving eNB id (SAT-11-eNB id) should be sent to the current serving eNB (SAT-12-eNB). This can be achieved by the following two possible methods:

Option a: The MME agent directly sends a message to the serving eNB (SAT-12-eNB), which contains the data forwarding indication and SAT-11-eNB id;

Option b: The MME agent sends a data forwarding indication and SAT-11-eNB id to the UE via a DL NAS message. After receiving the information, the UE sends a message containing the information to the serving eNB (SAT-12-eNB)

Step S6205: forward the stored data. Based on the indication and SAT-11-eNB id, SAT-12-eNB initiates X2 connection establishment with SAT-11-eNB and notifies SAT-11-eNB that data forwarding of UE should be started.

Step S6206: Forwarding data. The stored UE data is forwarded by SAT-11-eNB to SAT-12-eNB, and further forwarded to the proxy satellite eNB and S-GW. The stored UE signaling is forwarded by SAT-11-eNB to SAT-12-eNB, and further forwarded to the proxy satellite eNB and MME.

In the embodiments of the present disclosure, part or all of the steps and their optional implementations may be arbitrarily combined with part or all of the steps in other embodiments, or may be arbitrarily combined with optional implementations of other embodiments.

A communication method is provided, which is performed by a first core network device, and the method includes:

receiving first data sent by a first serving satellite access network device; or,

The first data is received from the first serving satellite access network device through the second serving satellite access network device.

In some embodiments, the method further includes sending second information to a second service satellite access network device.

The embodiments of the present disclosure also propose a device for implementing any of the above methods, for example, a device is proposed, the above device includes a unit or module for implementing each step performed by the terminal in any of the above methods. For another example, another device is also proposed, including a unit or module for implementing each step performed by a network device (such as an access network device, a core network function node, a core network device, etc.) in any of the above methods.

It should be understood that the division of the units or modules in the above device is only a division of logical functions, which can be fully or partially integrated into one physical entity or physically separated in actual implementation. In addition, the units or modules in the device can be implemented in the form of a processor calling software: for example, the device includes a processor, the processor is connected to a memory, and instructions are stored in the memory. The processor calls the instructions stored in the memory to implement any of the above methods or implement the functions of the units or modules of the above device, wherein the processor is, for example, a general-purpose processor, such as a central processing unit (CPU) or a microprocessor, and the memory is a memory inside the device or a memory outside the device. Alternatively, the units or modules in the device may be implemented in the form of hardware circuits, and the functions of some or all of the units or modules may be implemented by designing the hardware circuits. The hardware circuits may be understood as one or more processors; for example, in one implementation, the hardware circuits are application-specific integrated circuits (ASICs), and the functions of some or all of the above units or modules may be implemented by designing the logical relationship of the components in the circuits; for another example, in another implementation, the hardware circuits may be implemented by programmable logic devices (PLDs), and Field Programmable Gate Arrays (FPGAs) may be used as an example, which may include a large number of logic gate circuits, and the connection relationship between the logic gate circuits may be configured by configuring the configuration files, thereby implementing the functions of some or all of the above units or modules. All units or modules of the above devices may be implemented in the form of software called by the processor, or in the form of hardware circuits, or in the form of software called by the processor, and the remaining part may be implemented in the form of hardware circuits.

In the disclosed embodiments, the processor is a circuit with signal processing capability. In one implementation, the processor may be a circuit with instruction reading and running capability, such as a central processing unit (CPU), a microprocessor, a graphics processing unit (GPU) (which may be understood as a microprocessor), or a digital signal processor (DSP); in another implementation, the processor may implement certain functions through the logical relationship of a hardware circuit, and the logical relationship of the above hardware circuit may be fixed or reconfigurable, such as a hardware circuit implemented by an application-specific integrated circuit (ASIC) or a programmable logic device (PLD), such as an FPGA. In a reconfigurable hardware circuit, the process of the processor loading a configuration document to implement the hardware circuit configuration may be understood as the process of the processor loading instructions to implement the functions of some or all of the above units or modules. In addition, it can also be a hardware circuit designed for artificial intelligence, which can be understood as ASIC, such as Neural Network Processing Unit (NPU), Tensor Processing Unit (TPU), Deep Learning Processing Unit (DPU), etc.

FIG8a is a schematic diagram of the structure of the first service satellite access network device proposed in the embodiment of the present disclosure. As shown in FIG8a, the service satellite access network device 7100 may include: at least one of a transceiver module 7101, a processing module 7102, etc. In some embodiments, the transceiver module is used to send and receive information. Optionally, the transceiver module is used to execute at least one of the communication steps such as sending and/or receiving executed by the first service satellite access network device in any of the above methods, which will not be repeated here. Optionally, the processing module is used to execute at least one of the other steps executed by the first service satellite access network device in any of the above methods, which will not be repeated here.

In some embodiments, the processing module 7102 is configured to:

Determine that a feeder link is interrupted, and store first data; wherein the feeder link is a transmission link between a first service satellite access network device and a ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device;

Determine whether the feeder link is restored to obtain a first determination result; based on the first determination result, transmit the first data to the core network device or transmit the first data to the core network device through the second service satellite access network device, where the second service satellite access network device is a device with a feeder link between the ground station.

In some embodiments, the transceiver module 7101 is configured as one of the following:

Determine that the feeder link is restored, and transmit the first data to the core network device;

Determine that during the interruption of the feeder link, the service satellite access network device of the terminal switches from accessing the first service satellite access network device to accessing the second service satellite access network device, and transmits the first data to the core network device through the second service satellite access network device.

In some embodiments, the processing module 7102 is configured to:

Restoring a first connection between the first serving satellite access network device and the first core network device;

Restoring a second connection between the first serving satellite access network device and the second core network device;

The transceiver module 7101 is configured as at least one of the following:

Sending the control plane data to the first core network device through the first connection;

The user plane data is sent to the second core network device through the second connection.

In some embodiments, the processing module 7102 is configured to:

Establishing a third connection between the first serving satellite access network device and the second serving satellite access network device;

receiving first information sent by the second service satellite access network device; the first information is used to request to obtain the first data;

The transmitting the first data to the core network device through the second service satellite access network device includes:

The first data is sent to the second service satellite access network device through the third connection.

In some embodiments, the processing module 7102 is configured as follows: the first connection includes a first sub-connection; the first sub-connection is a connection between the first service satellite access network device and the first proxy core network device; and the restoring the first connection between the first service satellite access network device and the first core network device includes:

The first sub-connection is restored.

In some embodiments, the processing module 7102 is configured as follows: the second connection includes a third sub-connection; the third sub-connection is a connection between the first service satellite access network device and the first proxy access network device; and restoring the second connection between the first service satellite access network device and the second core network device includes:

The third sub-connection is restored.

FIG8b is a schematic diagram of the structure of the second service satellite access network device proposed in the embodiment of the present disclosure. As shown in FIG8b, the service satellite access network device 7200 may include: at least one of a transceiver module 7201, a processing module 7202, etc. In some embodiments, the transceiver module is used to send and receive information. Optionally, the transceiver module is used to execute at least one of the communication steps such as sending and/or receiving executed by the second service satellite access network device in any of the above methods, which will not be repeated here. Optionally, the processing module is used to execute at least one of the other steps executed by the second service satellite access network device in any of the above methods, which will not be repeated here.

In some embodiments, the receiving module 7201 is configured to:

Receiving second information sent by the first core network device;

The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device.

In some embodiments, the receiving module 7201 is configured as follows: the second information includes an identifier of the first serving satellite access network device.

In some embodiments, the processing module 7202 is configured to:

Establishing a third connection between the first serving satellite access network device and the second serving satellite access network device;

Sending first information to the first service satellite access network device; the first information is used to request to obtain the first data;

Receive the first data sent by the first service satellite access network device.

In some embodiments, the transceiver module 7201 is configured to:

Sending the control plane data to the first core network device through a fourth connection between the second serving satellite access network device and the first core network device;

The user plane data is sent to the second core network device through a fifth connection between the second service satellite access network device and the second core network device.

In some embodiments, the transceiver module 7201 is configured as follows: the fourth connection includes a fifth sub-connection and a sixth sub-connection; the fifth sub-connection is a connection between the second service satellite access network device and the first proxy core network device, and the sixth sub-connection is a connection between the second proxy core network device and the first core network device.

In some embodiments, the transceiver module 7201 is configured as follows: the fifth connection includes a seventh sub-connection and an eighth sub-connection; the seventh sub-connection is the connection between the second service satellite access network device and the first proxy access network device, and the eighth sub-connection is the connection between the first proxy access network device and the second core network device.

FIG8c is a schematic diagram of the structure of the first core network device proposed in the embodiment of the present disclosure. As shown in FIG8c, the first core network device 7300 may include at least one of: a transceiver module 7301, a processing module 7302, etc. In some embodiments, the transceiver module is used to send and receive information. Optionally, the transceiver module is used to execute the steps performed by the first core network device in any of the above methods. At least one of the communication steps of sending and/or receiving is not described in detail here. In some embodiments, the transceiver module may include a sending module and/or a receiving module, and the sending module and the receiving module may be separated or integrated. Optionally, the transceiver module may be interchangeable with the transceiver.

In some embodiments, the transceiver module 7301 is configured to:

Sending second information to a second service satellite access network device;

The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device.

In some embodiments, the transceiver module 7301 is configured to:

Determine that the service satellite access network device accessed by the terminal during the interruption of the feeder link is switched from accessing the first service satellite access network device to accessing the second service satellite access network device, and send the second information to the second service satellite access network device;

The feeder link is a transmission link between the first service satellite access network device and the ground station.

In some embodiments, the transceiver module 7301 is configured such that: the second information includes an identifier of the first serving satellite access network device.

In some embodiments, the processing module can be a module or include multiple submodules. Optionally, the multiple submodules respectively execute all or part of the steps required to be executed by the processing module. Optionally, the processing module can be replaced with the processor.

FIG9a is a schematic diagram of the structure of a communication device 8100 proposed in an embodiment of the present disclosure. The communication device 8100 may be a network device (e.g., an access network device, a core network device, etc.), or a terminal (e.g., a user device, etc.), or a chip, a chip system, or a processor that supports a network device to implement any of the above methods, or a chip, a chip system, or a processor that supports a terminal to implement any of the above methods. The communication device 8100 may be used to implement the method described in the above method embodiment, and the details may refer to the description in the above method embodiment.

As shown in FIG9a, the communication device 8100 includes one or more processors 8101. The processor 8101 may be a general-purpose processor or a dedicated processor, for example, a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and the communication data, and the central processing unit may be used to control the communication device (such as a base station, a baseband chip, a terminal device, a terminal device chip, a DU or a CU, etc.), execute a program, and process the data of the program. The communication device 8100 is used to execute any of the above methods.

In some embodiments, the communication device 8100 further includes one or more memories 8102 for storing instructions. Optionally, all or part of the memory 8102 may also be outside the communication device 8100.

In some embodiments, the communication device 8100 further includes one or more transceivers 8103. When the communication device 8100 includes one or more transceivers 8103, the transceiver 8103 performs at least one of the communication steps such as sending and/or receiving in the above method (for example, step S2101, step S3101, but not limited thereto), and the processor 8101 performs at least one of the other steps (for example, step S2102, step S3102, but not limited thereto).

In some embodiments, the transceiver may include a receiver and/or a transmitter, and the receiver and the transmitter may be separate or integrated. Optionally, the terms such as transceiver, transceiver unit, transceiver, transceiver circuit, etc. may be replaced with each other, the terms such as transmitter, transmission unit, transmitter, transmission circuit, etc. may be replaced with each other, and the terms such as receiver, receiving unit, receiver, receiving circuit, etc. may be replaced with each other.

In some embodiments, the communication device 8100 may include one or more interface circuits 8104. Optionally, the interface circuit 8104 is connected to the memory 8102, and the interface circuit 8104 may be used to receive signals from the memory 8102 or other devices, and may be used to send signals to the memory 8102 or other devices. For example, the interface circuit 8104 may read instructions stored in the memory 8102 and send the instructions to the processor 8101.

The communication device 8100 described in the above embodiments may be a network device or a terminal, but the scope of the communication device 8100 described in the present disclosure is not limited thereto, and the structure of the communication device 8100 may not be limited by FIG. 9a. The communication device may be an independent device or may be part of a larger device. For example, the communication device may be: 1) an independent integrated circuit IC, or a chip, or a chip system or subsystem; (2) a collection of one or more ICs, optionally, the above IC collection may also include a storage component for storing data and programs; (3) an ASIC, such as a modem; (4) a module that can be embedded in other devices; (5) a receiver, a terminal device, an intelligent terminal device, a cellular phone, a wireless device, a handheld device, a mobile unit, a vehicle-mounted device, a network device, a cloud device, an artificial intelligence device, etc.; (6) others, etc.

Fig. 9b is a schematic diagram of the structure of the chip 8200 proposed in the embodiment of the present disclosure. In the case where the communication device 8100 may be a chip or a chip system, reference may be made to the schematic diagram of the structure of the chip 8200 shown in Fig. 9b, but the present invention is not limited thereto.

The chip 8200 includes one or more processors 8201, and the chip 8200 is used to execute any of the above methods.

In some embodiments, the chip 8200 further includes one or more interface circuits 8202. Optionally, the interface circuit 8202 is connected to the memory 8203. The interface circuit 8202 can be used to receive signals from the memory 8203 or other devices, and the interface circuit 8202 can be used to send signals to the memory 8203 or other devices. For example, the interface circuit 8202 can read instructions stored in the memory 8203 and send the instructions to the processor 8201.

In some embodiments, the interface circuit 8202 executes at least one of the communication steps such as sending and/or receiving in the above method (for example, step S2101, step S3101, but not limited to this), and the processor 8201 executes at least one of the other steps (for example, step S2102, step S3102, but not limited to this).

In some embodiments, terms such as interface circuit, interface, transceiver pin, and transceiver may be used interchangeably.

In some embodiments, the chip 8200 further includes one or more memories 8203 for storing instructions. Optionally, all or part of the memory 8203 may be outside the chip 8200.

The present disclosure also proposes a storage medium, on which instructions are stored, and when the instructions are executed on the communication device 8100, the communication device 8100 executes any of the above methods. Optionally, the storage medium is an electronic storage medium. Optionally, the storage medium is a computer-readable storage medium, but is not limited to this, and it can also be a storage medium readable by other devices. Optionally, the storage medium can be a non-transitory storage medium, but is not limited to this, and it can also be a temporary storage medium.

The present disclosure also proposes a program product, which, when executed by the communication device 8100, enables the communication device 8100 to execute any of the above methods. Optionally, the program product is a computer program product.

The present disclosure also proposes a computer program, which, when executed on a computer, causes the computer to execute any one of the above methods.

Claims (24)

A communication method, characterized in that the method is performed by a first service satellite access network device, and the method comprises: Determine that a feeder link is interrupted, and store first data; wherein the feeder link is a transmission link between a first service satellite access network device and a ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device; Determine whether the feeder link is restored to obtain a first determination result; based on the first determination result, transmit the first data to the core network device or transmit the first data to the core network device through the second service satellite access network device, where the second service satellite access network device is a device with a feeder link between the ground station. The method according to claim 1, characterized in that the transmitting the first data to the core network device based on the first determination result or transmitting the first data to the core network device through the second serving satellite access network device comprises one of the following: Determine that the feeder link is restored, and transmit the first data to the core network device; Determine that during the interruption of the feeder link, the service satellite access network device of the terminal switches from accessing the first service satellite access network device to accessing the second service satellite access network device, and transmits the first data to the core network device through the second service satellite access network device. The method according to claim 2, characterized in that the method further comprises: Restoring a first connection between the first serving satellite access network device and the first core network device; Restoring a second connection between the first serving satellite access network device and the second core network device; The transmitting the first data to the core network device includes at least one of the following: Sending the control plane data to the first core network device through the first connection; The user plane data is sent to the second core network device through the second connection. The method according to claim 2, characterized in that the method further comprises: Establishing a third connection between the first serving satellite access network device and the second serving satellite access network device; receiving first information sent by the second service satellite access network device; the first information is used to request to obtain the first data; The transmitting the first data to the core network device through the second service satellite access network device includes: The first data is sent to the second service satellite access network device through the third connection. The method according to claim 3 is characterized in that the first connection includes a first sub-connection; the first sub-connection is a connection between the first serving satellite access network device and the first proxy core network device; and the restoring the first connection between the first serving satellite access network device and the first core network device comprises: The first sub-connection is restored. The method according to claim 3 is characterized in that the second connection includes a third sub-connection; the third sub-connection is a connection between the first service satellite access network device and the first proxy access network device; and the restoring the second connection between the first service satellite access network device and the second core network device comprises: The third sub-connection is restored. A communication method, characterized in that the method is performed by a second service satellite access network device, and the method comprises: Receiving second information sent by the first core network device; The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device. The method according to claim 7 is characterized in that the second information includes an identification of the first serving satellite access network device. The method according to claim 7, characterized in that the method further comprises: Establishing a third connection between the first serving satellite access network device and the second serving satellite access network device; Sending first information to the first service satellite access network device; the first information is used to request to obtain the first data; Receive the first data sent by the first service satellite access network device. The method according to claim 9, characterized in that the method further comprises: Sending the control plane data to the first core network device through a fourth connection between the second serving satellite access network device and the first core network device; The user plane data is sent to the second core network device through a fifth connection between the second service satellite access network device and the second core network device. The method according to claim 10, characterized in that the fourth connection includes a fifth sub-connection and a sixth sub-connection; The fifth sub-connection is a connection between the second serving satellite access network device and the first proxy core network device, and the sixth sub-connection is a connection between the second proxy core network device and the first core network device. The method according to claim 10 is characterized in that the fifth connection includes a seventh sub-connection and an eighth sub-connection; the seventh sub-connection is a connection between the second service satellite access network device and the first proxy access network device, and the eighth sub-connection is a connection between the first proxy access network device and the second core network device. A communication method, characterized in that the method is performed by a first core network device, and the method includes: Sending second information to a second service satellite access network device; The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device. The method according to claim 13, characterized in that the sending of the second information to the second service satellite access network device comprises: Determine that the service satellite access network device accessed by the terminal during the interruption of the feeder link is switched from accessing the first service satellite access network device to accessing the second service satellite access network device, and send the second information to the second service satellite access network device; The feeder link is a transmission link between the first service satellite access network device and the ground station. The method according to claim 13 is characterized in that the second information includes an identification of the first serving satellite access network device. A communication method, characterized in that the method comprises: The first service satellite access network device determines that the feeder link is interrupted, and the first service satellite access network device stores first data; wherein the feeder link is a transmission link between the first service satellite access network device and a ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device; The first serving satellite access network device determines that the feeder link is restored, and the first serving satellite access network device transmits the first data to the core network device; or, If the terminal switches from the first service satellite access network device to the second service satellite access network device, the first core network device sends second information to the second service satellite access network device, wherein the second information indicates the first service satellite access network device and the second information is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device. A first service satellite access network device, characterized in that the first service satellite access network device comprises: The processing module is configured as follows: Determine that a feeder link is interrupted, and store first data; wherein the feeder link is a transmission link between a first service satellite access network device and a ground station; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and a core network device; Determine whether the feeder link is restored to obtain a first determination result; based on the first determination result, transmit the first data to the core network device or transmit the first data to the core network device through the second service satellite access network device, where the second service satellite access network device is a device with a feeder link between the ground station. A second service satellite access network device, characterized in that the second service satellite access network device comprises: The transceiver module is configured as follows: Receiving second information sent by the first core network device; The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device. A first core network device, characterized in that the first core network device comprises: The transceiver module is configured as follows: Sending second information to a second service satellite access network device; The second information indicates the first service satellite access network device and is used to trigger the forwarding of the first data stored in the first service satellite access network device to the core network device through the second satellite access network device; the first data includes user plane data and/or control plane data transmitted between the first service satellite access network device and the core network device. A communication system, characterized in that the communication system includes a first service satellite access network device, a second service satellite access network device and a first core network device; the first service satellite access network device is configured to implement the method described in any one of claims 1 to 6, the first service satellite access network device is configured to implement the method described in any one of claims 7 to 12, and the first core network device is configured to implement the method described in any one of claims 13 to 15. A first service satellite access network device, characterized in that the first service satellite access network device comprises: one or more processors; Wherein, the first service satellite access network device is used to execute the method described in any one of claims 1 to 6. A second service satellite access network device, characterized in that the second service satellite access network device comprises: one or more processors; Wherein, the second service satellite access network device is used to execute the method described in any one of claims 7 to 12. A first core network device, characterized in that the first core network device comprises: one or more processors; The access network device is used to execute the method described in any one of claims 13 to 15. A storage medium, characterized in that the storage medium stores instructions, and when the instructions are executed on a communication device, the communication device executes the method described in any one of claims 1 to 6, claims 7 to 12, and claims 13 to 15.