CN112055391B

CN112055391B - Communication method, device and system applied to satellite network

Info

Publication number: CN112055391B
Application number: CN202010790235.0A
Authority: CN
Inventors: 王洪超; 张宏科; 项宇红; 杨冬; 冯博昊; 张云峰; 冯旭
Original assignee: Beijing Jiaotong University; China Academy of Electronic and Information Technology of CETC
Current assignee: Beijing Jiaotong University; China Academy of Electronic and Information Technology of CETC
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-11-16
Anticipated expiration: 2040-08-07
Also published as: CN112055391A

Abstract

The invention provides a communication method, a device and a system applied to a satellite network, comprising the following steps: receiving a data packet sent by a sending end; distributing corresponding mapping items to a sending end according to a preset access control strategy; updating the mapping items according to a preset movement rule; extracting a data transmission request according to a data packet transmitted by a transmitting end; sending the updated mapping item and the data sending request to an identification mapping server; receiving a current mapping item of a receiving end fed back by the identifier mapping server; and sending the data packet to the identification exchange router corresponding to the receiving end according to the current mapping item. The invention can always use the original IP to establish the logical communication connection through the corresponding label exchange router to the mapping item update and the mapping operation of the data packet, and the original established logical communication connection can not be interrupted due to the change of the route label in the process of the inter-satellite mobile switching of the user terminal, thereby ensuring the accuracy and the continuity of the transmission.

Description

Communication method, device and system applied to satellite network

Technical Field

The invention relates to the technical field of communication, in particular to a communication method, a device and a system applied to a satellite network.

Background

The satellite network can realize seamless coverage and information intercommunication in a huge space and is widely applied to the fields of communication, navigation, remote sensing and the like, but network nodes of the satellite network are in motion, the topology is dynamic and easy to change, and the connection stability established by a ground user through the satellite network is poor. In order to maximize the communication experience of a user, the conventional mobile IP technology realizes the continuity of mobile node communication by introducing a home agent and a foreign agent, but when the mobile node is far away from the home agent, the time delay of the process of registering the mobile node with the home agent directly or through the foreign agent is long, and when the number of the mobile nodes is large, the signaling overhead caused by frequent registration updating is large, and meanwhile, the use of the mobile IP technology also needs to modify the conventional terminal, so the conventional mobile IP technology cannot be well applied to a satellite network with unstable connection between nodes.

Disclosure of Invention

In view of this, embodiments of the present invention provide a communication method, apparatus, and system applied to a satellite network, which solve the problems in the prior art that when a traditional mobile IP technology is used for satellite network communication, a registration process is delayed for a long time, the number of mobile terminals is large, frequent registration signaling overhead is large, and a terminal needs to be modified.

The embodiment of the invention provides a communication method applied to a satellite network, which is applied to an identification exchange router of a sending end and comprises the following steps: receiving a data packet sent by a sending end, and extracting a data sending request of the sending end according to the data packet; distributing corresponding mapping items to a sending end according to a preset access control strategy, wherein the mapping items are used for representing the mapping relation between an access identifier and a route identifier of the sending end; updating the mapping entries according to a preset movement rule; sending the updated mapping item and the data sending request to an identification mapping server; (ii) a Receiving a current mapping item of a receiving end fed back by the identifier mapping server, wherein the current mapping item is obtained by the identifier mapping server according to the data sending request and is between the receiving end and an identifier switching router corresponding to the receiving end; and sending the data packet to the identification exchange router corresponding to the receiving end according to the current mapping item.

Optionally, the communication method applied to the satellite network provided in the embodiment of the present invention further includes: receiving a first confirmation notification sent by the identifier mapping server, wherein the first confirmation notification is a notification that the identifier mapping server confirms whether the updated mapping entry is correct or not; and sending a first reply notification to the identifier mapping server according to the first confirmation notification.

The embodiment of the invention also provides a communication method applied to a satellite network, which is applied to an identifier mapping server and comprises the following steps: receiving updated mapping entries and data sending requests sent by an identifier switching router corresponding to a sending end, wherein the mapping entries are used for representing the mapping relation between access identifiers and routing identifiers of the sending end; acquiring receiving end information from the data sending request, and sending a current mapping item acquisition request to an identification exchange router corresponding to a receiving end according to the receiving end information; receiving a current mapping item sent by an identification exchange router corresponding to the receiving end; and sending the current mapping item to an identifier switching router corresponding to the sending end.

Optionally, the communication method applied to the satellite network provided in the embodiment of the present invention further includes: judging whether the updated mapping item is correct or not; when the updated mapping item is correct, sending a first confirmation notice with a correct type to the identification exchange router corresponding to the sending end, and if the mapping item is incorrect, sending a first confirmation notice with an incorrect type to the identification exchange router corresponding to the sending end; and receiving a first reply notification sent by the identity switching router corresponding to the sending end, wherein the first reply notification is a reply of the identity switching router corresponding to the sending end to the first confirmation notification.

Optionally, when the current mapping entry is an updated mapping entry, the communication method applied to the satellite network according to the embodiment of the present invention further includes: judging whether the current mapping item is correct or not; when the current mapping item is correct, sending a second confirmation notice with the correct type to the identification exchange router corresponding to the receiving end, and if the current mapping item is incorrect, sending a second confirmation notice with the incorrect type to the identification exchange router corresponding to the receiving end; and receiving a second reply notification sent by the identification exchange router corresponding to the receiving end, wherein the second reply notification is a reply of the identification exchange router corresponding to the receiving end to the second confirmation notification.

The embodiment of the invention also provides a communication method applied to a satellite network, which is applied to an identification exchange router of a receiving end and comprises the following steps: receiving a current mapping item acquisition request sent by an identifier mapping server; sending a current mapping item to an identifier mapping server, wherein the current mapping item is used for representing a mapping relation between an access identifier and a route identifier of a receiving end; receiving a data packet sent by an identification exchange router corresponding to a sending end, wherein the data packet is sent by the identification exchange router corresponding to the sending end according to the current mapping item; and sending the data packet to the receiving end.

Optionally, after receiving the current mapping entry obtaining request sent by the identifier mapping server, before sending the current mapping entry to the identifier mapping server, the method further includes: updating a mapping item in a mapping table according to a preset movement rule, wherein the mapping item is used for representing a mapping relation between an access identifier and a route identifier of a receiving end; and determining the updated mapping entry as the current mapping entry.

Optionally, after the map entry in the map table is updated according to the preset movement rule, the method further includes: receiving a second confirmation notification sent by the identifier mapping server, wherein the second confirmation notification is a notification that the identifier mapping server confirms whether the current mapping item is correct or not; and sending a second reply notification to the identifier mapping server according to the second confirmation notification.

The embodiment of the invention also provides a communication device applied to a satellite network, which is applied to an identifier exchange router of a sending end and comprises the following components: the first receiving module is used for receiving a data packet sent by a sending end and extracting a data sending request of the sending end according to the data packet; the first processing module is used for distributing corresponding mapping items to the sending end according to a preset access control strategy; the second processing module is used for updating the mapping items according to a preset movement rule; the first sending module is used for sending the updated mapping entries and the data sending requests to the identifier mapping server; the second receiving module is used for receiving the current mapping item of the receiving end fed back by the identifier mapping server; and the second sending module is used for sending the data packet to the identifier switching router corresponding to the receiving end according to the current mapping entry.

The embodiment of the invention also provides a communication device applied to a satellite network, which is applied to an identifier mapping server and comprises the following components: a third receiving module, configured to receive the updated mapping entry and the data sending request sent by the identity switching router corresponding to the sending end; a third sending module, configured to obtain receiving end information from the data sending request, and send a current mapping entry obtaining request to an identifier switching router corresponding to a receiving end according to the receiving end information; a fourth receiving module, configured to receive a current mapping entry sent by an identifier switching router corresponding to the receiving end; and the fourth sending module is configured to send the current mapping entry to the label switching router corresponding to the sending end.

The embodiment of the invention also provides a communication device applied to a satellite network, which is applied to an identification exchange router of a receiving end and comprises: a fifth receiving module, configured to receive a current mapping entry obtaining request sent by the identifier mapping server; a fifth sending module, configured to send the current mapping entry to the identifier mapping server; a sixth receiving module, configured to receive a data packet sent by the label switching router corresponding to the sending end; and the sixth sending module is used for sending the data packet to the receiving end.

The embodiment of the invention also provides a communication system applied to a satellite network, which comprises: the system comprises a sending end, a first identification exchange router, an identification mapping server, a second identification exchange router and a receiving end, wherein the sending end is used for sending a data packet to the first identification exchange router; the first identification exchange router is used for receiving a data packet sent by a sending end; extracting a data transmission request according to a data packet transmitted by a transmitting end; allocating mapping items to the newly accessed sending end according to a preset strategy; updating the mapping entries in the mapping table according to a preset movement rule; sending the updated mapping item and the data sending request to an identification mapping server; the identification mapping server receives updated mapping entries and data sending requests sent by a first identification exchange router corresponding to a sending end; acquiring receiving end information from the data sending request, and sending a current mapping item acquisition request to a second identifier switching router corresponding to a receiving end according to the receiving end information; the second label switching router is used for receiving a current mapping item acquisition request sent by the label mapping server; sending the current mapping item to an identification mapping server; the identifier mapping server is further configured to receive a current mapping entry sent by an identifier switching router corresponding to the receiving end; sending the current mapping item to a first identifier switching router corresponding to the sending end; the first identification interaction router is also used for receiving the current mapping item of the receiving end fed back by the identification mapping server; sending the data packet to a second identifier switching router corresponding to the receiving end according to the current mapping item; the second label switching router is also used for receiving a data packet sent by the first label switching router corresponding to the sending end; and sending the data packet to the receiving end.

An embodiment of the present invention further provides an electronic device, including: the communication method applied to the satellite network provided by the embodiment of the invention is implemented by executing the computer instructions.

Embodiments of the present invention also provide a computer-readable storage medium storing computer instructions for causing a computer to execute a communication method applied to a satellite network according to an embodiment of the present invention.

The technical scheme of the invention has the following advantages:

the embodiment of the invention provides a communication method applied to a satellite network, which is characterized in that an access identifier and a route identifier respectively represent identity information and position information of an access terminal through updating a mapping entry of an identifier exchange router corresponding to a sending end, so that a user terminal can always establish logical communication connection by using an original IP, and further, in the process of inter-satellite mobile switching of the user terminal, the original established logical communication connection cannot be interrupted due to the change of the route identifier, and the problem of poor mobility support of the existing IP network terminal is effectively solved; and the data packet is sent according to the current mapping item of the receiving end, so that the accuracy and the continuity of transmission are ensured.

The embodiment of the invention provides a communication method applied to a satellite network, which comprises the steps of receiving updated mapping entries and data sending requests through an identification mapping server, acquiring receiving end information from the data sending requests, and sending current mapping entry acquiring requests to identification exchange routers corresponding to receiving ends according to the receiving end information so as to accurately acquire correct receiving end information in real time; and the current mapping item is sent to the corresponding identification exchange router of the sending end, so that the accuracy of the position information of the receiving end in the data transmission process is ensured.

The embodiment of the invention provides a communication method applied to a satellite network, wherein an identification exchange router at a receiving end sends mapping items of the receiving end to an identification mapping server, and the identification exchange router corresponding to a sending end accurately sends data packets to the receiving end according to the corresponding mapping items of the receiving end, so that the accuracy of data communication is ensured.

The embodiment of the invention provides a communication system applied to a satellite network, which comprises: the system comprises a sending end, a first identification exchange router, an identification mapping server, a second identification exchange router and a receiving end. Receiving a data packet sent by a sending end through a first identification exchange router; updating the mapping entries in the mapping table according to a preset movement rule; sending the updated mapping item and the data sending request to an identification mapping server; receiving a current mapping item of a receiving end fed back by the identifier mapping server; the data packet is sent to the receiving end through the second identification exchange router according to the current mapping item, so that short-time switching can be realized, the original network connection cannot be interrupted due to the movement of the satellite, and the problems that in the prior art, the time delay of the registration process is long, the number of mobile terminals is large, the overhead of frequent registration signaling is large, and the terminals need to be modified are effectively solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a communication system applied to a satellite network according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of communication interaction applied to a satellite network according to an embodiment of the present invention;

fig. 3 is an interaction diagram of relative motion between a transmitting end and a satellite network according to an embodiment of the present invention;

FIG. 4 is an interaction diagram illustrating relative movement between a receiver and a satellite network according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a functional module of an id switch router corresponding to a transmitting end of a communication system applied to a satellite network according to an embodiment of the present invention;

fig. 6 is a schematic diagram of an identifier mapping server function module of a communication system applied to a satellite network according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a functional module of an id switch router corresponding to a receiving end of a communication system applied to a satellite network according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an electronic device in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

In the process that a ground user establishes connection through a satellite network, before a sending end and a receiving end carry out data transmission, identification exchange routers of the sending end and the receiving end need to register corresponding mapping entries to an identification mapping server respectively, so that the sending end, the receiving end and the satellite network quickly update the mapping entries when relative motion occurs, and data is mapped and transmitted in time, so that communication can be kept uninterrupted.

Fig. 1 shows a communication system applied to a satellite network according to an embodiment of the present invention, the system including: the system comprises a sending end, a first identification exchange router, an identification mapping server, a second identification exchange router and a receiving end, wherein the sending end is used for sending a data packet to the first identification exchange router; the first identification exchange router is used for receiving a data packet sent by a sending end, distributing corresponding mapping items to the sending end according to a preset access control strategy, updating the mapping items in the mapping table according to a preset movement rule, sending the updated mapping items to an identification mapping server, extracting a data sending request of the sending end according to data sent by the sending end, and sending the data sending request to the identification mapping server; the identification mapping server receives updated mapping entries and data sending requests sent by a first identification switching router corresponding to a sending end, acquires receiving end information from the data sending requests, and sends current mapping entry acquiring requests to a second identification switching router corresponding to a receiving end according to the receiving end information; the second identification exchange router is used for receiving a current mapping item acquisition request sent by the identification mapping server and sending the current mapping item to the identification mapping server; the identification mapping server is also used for receiving a current mapping item sent by a second identification switching router corresponding to the receiving end and sending the current mapping item to a first identification switching router corresponding to the sending end; the first identification exchange router is also used for receiving the current mapping item of the receiving end fed back by the identification mapping server and sending the data packet to a second identification exchange router corresponding to the receiving end according to the current mapping item; the second label switching router is also used for receiving the data packet sent by the first label switching router corresponding to the sending end and sending the data packet to the receiving end.

In practical application, the identity attribute and the position attribute of an IP address are separated by an identifier mapping network, the identities of hosts (a sending end and a receiving end of data) are represented by access identifiers, the locations of the hosts (the corresponding registered identifier switch routers of the sending end and the receiving end) are represented by routing identifiers, the first identifier switch router is the corresponding registered identifier switch router of the sending end, the second identifier switch router is the corresponding registered identifier switch router of the receiving end, the mapping relation between each host access identifier and each location identifier is stored in each identifier switch router and each identifier mapping server, the access identifiers are kept unchanged when the hosts move, and the routing identifiers move along with the locations, so that uninterrupted connection can be ensured, and the formation of triangular routing is avoided by updating mapping entries.

Fig. 2 shows a communication interaction flow applied to a satellite network according to an embodiment of the present invention, and as shown in fig. 2, the communication method applied to the satellite network is applied to an id switch router of a sending end, an id mapping server and an id switch router of a receiving end, where the id switch router of the sending end performs steps S101 to S106, the id mapping server performs steps S201 to S204, and the id switch router of the receiving end performs steps S301 to S304, and specifically includes the following steps:

step S101: and receiving a data packet sent by a sending end, and extracting a data sending request of the sending end according to the data packet.

Specifically, when a user at a sending end requests to access a satellite network, registration information is sent to a corresponding label switching router, after the registration is completed, the sending end can send a data packet to the corresponding label switching router, and the label switching router extracts a data sending request from the data packet.

Step S102: and distributing corresponding mapping items to the sending end according to a preset access control strategy.

Specifically, after the sending end is successfully registered, the corresponding identification exchange router allocates a routing identification and a mapping item for the user terminal, each identification exchange router has a unique routing identification of the whole network, a user accessing a ground terminal of a satellite network has a unique access identification, and the identification exchange router establishes a mapping relation among the access identification, a data packet IP address and the routing identification of the current identification exchange router for the user and stores the mapping relation in a local access mapping table of the identification exchange router.

Step S103: and updating the mapping entries according to a preset movement rule.

Specifically, after receiving a data packet sent by a sending end, it may further be determined whether the corresponding data packet meets a preset security verification condition, where the preset security verification condition includes: format verification, IP address verification, communication number verification, service port verification and the like. In practical applications, the format verification includes: verifying whether the format of the corresponding data message conforms to the preset message format regulation; the IP address verification comprises the following steps: verifying whether the IP address of the request terminal in the data message is a preset credit granting IP address; the communication number verification comprises the following steps: verifying whether the communication number of the request terminal in the data message is a preset signal number section; the service port verification comprises the following steps: and verifying whether the port number of the request service in the data message is consistent with the port number preset by the service. Through the verification process, the validity of the data message sent by the sending end can be effectively verified, and the safety of communication between the sending end and the receiving end is further guaranteed.

In the embodiment of the invention, after the mapping relation is distributed, the identifier switching router sends the mapping item, the identifier switching router where the mapping item is located and the time of user registration to the identifier mapping server together, and the time range of the mapping item can be determined according to the time of user registration, so that the mapping item can be conveniently migrated according to a preset movement rule; then, the label switching router updates mapping entries in the mapping table according to a preset movement rule, wherein the mapping entries are used for representing the mapping relation between the access label and the route label of the sending end; in practical application, each label switching router maintains two mapping tables, namely a local access mapping table and a remote access mapping table; for the label switching router corresponding to the sending end, the mapping item corresponding to the user (sending end) accessing the satellite network through the current label switching router is stored in the local access mapping table, and the mapping item corresponding to the opposite end user (receiving end) which needs to communicate by the local access user is stored in the remote access mapping table. When communication is needed, the identification exchange router requests the mapping item of the receiving end from the identification mapping server and stores the mapping item in the remote access mapping table of the equipment.

The process of transferring mapping entries between adjacent label switching routers is specifically as follows:

for the local access mapping table: each identification exchange router maintains two mapping tables of a current time interval (a first time interval) and a next time interval (a second time interval), in the second time interval, an access user in the mapping table is a user stored in a local access mapping table of the first time interval in the previous identification exchange router reaching the current position, and the corresponding routing identifications are all routing identifications corresponding to the current identification exchange router; for the remote access mapping table: each label switching router maintains two mapping tables of a current time interval (a first time interval) and a next time interval (a second time interval), in the second time interval, a communication opposite-end user in the mapping table is a user which is stored in a remote access mapping table of the first time interval in the previous label switching router reaching the current position, and a route label corresponding to the communication opposite-end user needs to be obtained by requesting an label mapping server. In addition, in order to better support mobility, mapping entries in the local access mapping table in the first period are transferred to the remote access mapping table in the second period, and corresponding routing identifiers are converted into routing identifiers corresponding to the next identifier switching router reaching the current position, so that short-time switching can be realized, and the original network connection cannot be interrupted due to movement of a satellite.

In practical application, for example, in a period 1, a user a accesses a network from a satellite 1, where a mapping entry state of a in a local access mapping table on the satellite 1 is 1, which indicates that the mapping entry is a valid entry in the current period 1; after the satellite 2 interacts with the satellite 1, the local access mapping table of the satellite 2 stores the mapping entry of a and has a state of 0, which indicates that the local access mapping table is to be enabled in the next period 2. When entering a time interval 2 from a time interval 1, the satellite moves, a user A is connected to the satellite 2, a mapping item of A in the satellite 1 is stored in a remote access mapping table, and a routing identifier of the mapping item is a routing identifier of the satellite 2; the state of the mapping entry for a in satellite 2 changes from 0 to 1. At this time, the user a communicates with other users, and the processes of registration and mapping allocation of the user do not need to be performed again.

Step S104: and sending the updated mapping item and the data sending request to an identification mapping server.

Step S201: and receiving updated mapping entries and data sending requests sent by the identifier switching router corresponding to the sending end, wherein the mapping entries are used for representing the mapping relation between the access identifiers and the routing identifiers of the sending end.

Step S202: and acquiring receiving end information from the data sending request, and sending a current mapping item acquisition request to the identification exchange router corresponding to the receiving end according to the receiving end information.

Step S301: and receiving a current mapping item acquisition request sent by the identifier mapping server.

Step S302: and sending the current mapping item to an identifier mapping server, wherein the current mapping item is used for representing the mapping relation between the access identifier and the routing identifier of the receiving end.

Step S203: receiving a current mapping entry; in the embodiment of the invention, the mapping item is sent by the identification exchange router corresponding to the receiving end, and the identification mapping server stores the current mapping item, namely the mapping item of the receiving end.

Step S204: and sending the current mapping item to the corresponding identification exchange router of the sending end.

Step S105: receiving a current mapping entry identifying a receiving end of the mapping server feedback. And storing the received current mapping item in a remote access table, wherein the current mapping item is the current mapping item between the receiving end and the corresponding identification exchange router obtained by the identification mapping server according to the data sending request.

Step S106: and sending the data packet to the identification exchange router corresponding to the receiving end according to the current mapping item. And carrying out mapping operation on the data packet according to the current mapping entry and the mapping entry corresponding to the sending end, and sending the mapped data packet to the identification switching router corresponding to the receiving end, wherein the mapped data packet comprises a source address, a destination address, data information and the like.

Specifically, the mapping operation on the data packet includes: encrypting an original network layer header to protect user data from being attacked; and according to the inquired parameters such as the source route identifier, the destination route identifier, the user grade and the like and the mapping entry information corresponding to the sending end, packaging an identifier network header for the data packet, and transmitting the data packet after checking.

Step S303: and receiving a data packet sent by the label switching router corresponding to the sending end.

Specifically, when an identifier exchange router corresponding to a receiving end receives a user data packet with a destination routing identifier being a local routing identifier, the user data packet is first demapped, an access identifier of a destination device in the data packet is extracted, whether the access identifier exists in a local access mapping table in the current time period is checked, and if the access identifier exists in the local access mapping table in the current time period, the demapped data packet is directly sent to the receiving end; if not, the remote access mapping table or the identification mapping server inquires the identification of the route corresponding to the access identification in the current time period, performs mapping operation on the data packet again, and forwards the data packet to the identification exchange router corresponding to the current receiving end.

Step S304: and sending the data packet to a receiving end.

Specifically, in an embodiment, the communication method applied to the satellite network is applied to an identifier switching router and an identifier mapping server at a transmitting end, where the identifier switching router at the transmitting end performs steps S107 to S108, and the identifier mapping server performs steps S205 to S207, and specifically includes the following steps:

step S205: and judging whether the updated mapping item is correct or not.

Specifically, after receiving the updated mapping entry sent by the identity switching router corresponding to the sending end, comparing whether an access identifier in the local access mapping table of the corresponding identity switching router at the current time period is consistent with an access identifier of the current mapping entry stored in the identity mapping server.

Step S206: when the updated mapping item is correct, sending a first confirmation notice with the correct type to the identification exchange router corresponding to the sending end; and if the user information is incorrect, updating the user information in the mapping table in the identifier mapping server, and sending a first confirmation notice with the type of error to the identifier exchange router corresponding to the sending end.

Step S107: and receiving a first confirmation notification sent by the identifier mapping server, wherein the first confirmation notification is a notification for confirming whether the updated mapping item is correct or not by the identifier mapping server.

Step S108: and sending a first reply notification to the identifier mapping server according to the first confirmation notification. Wherein the first acknowledgement notification is divided into two basic types, a first acknowledgement notification of a correct type and a first acknowledgement notification of an incorrect type.

Step S207: and receiving a first reply notification sent by the identification exchange router corresponding to the sending end, wherein the first reply notification is a reply of the identification exchange router corresponding to the sending end to the first confirmation notification.

Specifically, in an embodiment, when the current mapping entry is an updated mapping entry, which indicates that the receiving end moves relative to the satellite network, the communication method applied to the satellite network is applied to the id mapping server and the id switch router of the receiving end, where the id mapping server performs steps S208 to S209, and the id switch router of the receiving end performs step S305, and the method specifically includes the following steps:

step S208: judging whether the current mapping item is correct, and sending a second confirmation notice with the correct type to the identification exchange router corresponding to the receiving end when the current mapping item is correct; and when the current mapping entry is incorrect, sending a second confirmation notice with the type of error to the corresponding label switching router of the receiving end.

Step S305: receiving a second confirmation notification sent by the identifier mapping server, wherein the second confirmation notification is a notification for the identifier mapping server to confirm whether the current mapping item is correct or not; and sending a second reply notification to the identity mapping server according to the second confirmation notification.

Step S209: and receiving a second reply notification sent by the identification exchange router corresponding to the receiving end, wherein the second reply notification is a reply of the identification exchange router corresponding to the receiving end to the second confirmation notification.

Specifically, in an embodiment, the communication method applied to the satellite network is applied to an identifier switching router of a receiving end, and after step S301 and before step S302, the method further includes the following steps:

step S312: and updating mapping entries in the mapping table according to a preset movement rule, wherein the mapping entries are used for representing the mapping relation between the access identification and the route identification of the receiving end.

Step S322: and determining the updated mapping entry as the current mapping entry.

Specifically, after the step S312, the method further includes:

step S313: receiving a second confirmation notification sent by the identifier mapping server, wherein the second confirmation notification is a notification for the identifier mapping server to confirm whether the current mapping item is correct or not; and sending a second reply notification to the identity mapping server according to the second confirmation notification.

For the specific processes of the above steps, reference is made to the related description of the communication system applied to the satellite network in another embodiment of the present invention, and details are not repeated here.

By executing the above steps, the communication method applied to the satellite network provided by the embodiment of the present invention updates the mapping entry by the identifier switching router corresponding to the sending end, so that the access identifier and the routing identifier respectively represent the identity information and the location information of the access terminal, so that the terminal can always establish a logical communication connection using the original IP, and further, in the inter-satellite mobile handover process of the user terminal, the original established logical communication connection is not interrupted due to the change of the routing identifier, thereby effectively solving the problem of poor mobility support of the existing IP network terminal; then, the data packet is sent according to the current mapping item of the receiving end, so that the accuracy and the consistency of transmission are ensured, and the accuracy of the position information of the receiving end in the data transmission process is ensured; when the satellite moves out of the current coverage area, the next satellite takes over the current coverage area and updates the mapping table to the stored next-time-period identification mapping table, and meanwhile, the next-time-period identification mapping table is requested to the identification mapping server and stored, so that short-time switching is realized, the original network connection cannot be interrupted due to the movement of the satellite, and the problem of mobility caused by the in-orbit movement of the satellite is effectively solved.

The network switching caused by the relative motion between the terminal user and the satellite network comprises the condition that the transmitting end and the satellite network move relatively and the condition that the receiving end and the satellite network move relatively.

Specifically, in an embodiment, in a process that an end user performs communication through an access satellite network, relative motion between the end user and the satellite network is shown in fig. 3 and fig. 4, respectively, where an identifier switching router is denoted as an IDSR, an identifier mapping server is denoted as an IDMS, an access identifier is denoted as an AID, and a routing identifier is denoted as an RID, and the specific implementation process is as follows:

as shown in fig. 3, for the relative motion between the transmitting end and the satellite network: firstly, assume that a sending end has an access identifier AID1, a receiving end has an access identifier AID2, an identifier switch router before the sending end switches is IDSR1, the route identifier is RID1, an identifier switch router after the sending end switches is IDSR2, the route identifier is RID2, an identifier switch router corresponding to the receiving end is IDSR3, and the route identifier is RID 3. In the communication process before switching, the mapping entries of the transmitting end are < AID1, RID1>, the mapping entries of the receiving end are < AID2, RID3>, and the IDSR1 transmits data to the IDSR3 by using the route identification of [ RID1, RID3 ]. At a certain moment, the sending end is switched, the IDSR1 sends a message of terminal switching corresponding to AID1 to the IDSR2, after the confirmation of the identifier mapping server, at this time, the mapping entries at the sending end on the IDSR2 are < AID1, RID2>, the mapping entries at the receiving end are not changed, the IDSR2 maps the data packets by using the routing identifiers of [ RID2, RID3], then sends the data packets to the IDSR3, and then the data packets are de-mapped by the IDSR3 and then are forwarded to the sending user 2.

As shown in fig. 4, for the relative motion between the receiving end and the satellite network: firstly, assume that a sending end has an access identifier AID1, a receiving end has an access identifier AID2, an identifier switch router corresponding to the sending end is IDSR4, a route identifier thereof is RID4, an identifier switch router before the receiving end is switched is IDSR5, a route identifier thereof is RID5, an identifier switch router after the receiving end is switched is IDSR6, and a route identifier thereof is RID 6. In the communication process before switching, the mapping entries of the transmitting end are < AID1, RID4>, the mapping entries of the receiving end are < AID2, RID5>, and the IDSR4 transmits data to the IDSR5 by using the route identification of [ RID4, RID5 ]. At a certain moment, the receiving end is switched to the IDSR6, the IDSR5 sends a mapping table to the IDSR6, and after the identification mapping server confirms, the mapping entries of the receiving end on the IDSR6 are < AID2, RID6>, and the mapping entries of the receiving end on the IDSR5 also become < AID2, RID6 >; but at this time, the mapping entry on IDSR4 is not updated yet, so the packet will still be mapped and sent out with the route identifier [ RID4, RID5 ]; after receiving the data packet, the IDSR5 finds that the actual target user is the receiving end corresponding to the AID2, but at this time, the receiving end is not accessed from the IDSR5, so the IDSR5 performs table lookup and then performs mapping on the data packet with the routing identifier [ RID4, RID6] again, and sends out the data packet; meanwhile, the IDSR5 informs the IDSR4 of a new mapping entry corresponding to the receiving end; after receiving the data packet, IDSR6 checks that the receiving end is currently accessing from the local, and may demap and send the data packet to the receiving end. When the sender sends data to the receiver again, the IDSR4 may query the updated mapping entry, directly perform mapping with the routing identifier [ RID4, RID6] on the data packet, and send the data packet out. Thereby reducing the overhead of triangle routing.

Through the cooperative cooperation of the above components, the communication system applied to the satellite network provided by the embodiment of the present invention includes: the system comprises a sending end, a first identification exchange router, an identification mapping server, a second identification exchange router and a receiving end. Receiving a data packet sent by a sending end through a first identification exchange router, extracting a data sending request according to the data sent by the sending end, allocating a mapping relation to an access end according to a preset access strategy, updating mapping entries in a mapping table according to a preset movement rule, sending the updated mapping entries and the extracted data sending request to an identification mapping server, receiving a current mapping entry of the receiving end fed back by the identification mapping server, and sending the data packet to a second identification exchange router corresponding to the receiving end according to the current mapping entry, and then the scheme forwarded to the receiving end can realize short-time switching, the original network connection can not be interrupted due to the movement of the satellite, and the problems that the time delay of the registration process is long, the number of mobile terminals is large, the overhead of frequent registration signaling is large, and the terminals need to be modified in the prior art are effectively solved.

A communication apparatus applied to a satellite network according to an embodiment of the present invention, as shown in fig. 5, is an id switch router applied to a transmitting end, including:

the first receiving module 11 is configured to receive a data packet sent by a sending end, and extract a data sending request of the sending end according to the data packet.

The first processing module 12 is configured to allocate a corresponding mapping entry to the sending end according to a preset access control policy.

And the second processing module 13 is configured to update the mapping entry according to a preset movement rule.

A first sending module 14, configured to send the updated mapping entry and the data sending request to the identifier mapping server.

A second receiving module 15, configured to receive a current mapping entry that identifies a receiving end fed back by the mapping server.

And a second sending module 16, configured to send the data packet to the identifier switching router corresponding to the receiving end according to the current mapping entry.

For the specific processes of the above modules, reference is made to the related description of the communication system applied to the satellite network in another embodiment of the present invention, and details are not repeated here.

A communication apparatus applied to a satellite network according to an embodiment of the present invention, as shown in fig. 6, is applied to an identifier mapping server, and includes:

a third receiving module 21, configured to receive the updated mapping entry and the data sending request sent by the identity switching router corresponding to the sending end.

And a third sending module 22, configured to obtain the receiving end information from the data sending request, and send a current mapping entry obtaining request to the identifier switching router corresponding to the receiving end according to the receiving end information.

The fourth receiving module 23 is configured to receive the current mapping entry sent by the identifier switching router corresponding to the receiving end.

And a fourth sending module 24, configured to send the current mapping entry to the label switching router corresponding to the sending end.

A communication apparatus applied to a satellite network according to an embodiment of the present invention, as shown in fig. 7, is an id switch router applied to a receiving end, and includes:

a fifth receiving module 31, configured to receive a current mapping entry obtaining request sent by the identifier mapping server.

A fifth sending module 32, configured to send the current mapping entry to the identifier mapping server.

A sixth receiving module 33, configured to receive the data packet sent by the label switching router corresponding to the sending end.

And a sixth sending module 34, configured to send the data packet to the receiving end.

There is also provided an electronic device according to an embodiment of the present invention, as shown in fig. 8, the electronic device may include a processor 901 and a memory 902, where the processor 901 and the memory 902 may be connected by a bus or in another manner, and fig. 8 takes the example of being connected by a bus.

Processor 901 may be a Central Processing Unit (CPU). The Processor 901 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.

The memory 902, which is a non-transitory computer readable storage medium, may be used for storing non-transitory software programs, non-transitory computer executable programs, and modules, such as program instructions/modules corresponding to the methods in the method embodiments of the present invention. The processor 901 executes various functional applications and data processing of the processor by executing non-transitory software programs, instructions and modules stored in the memory 902, that is, implements the methods in the above-described method embodiments.

The memory 902 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 901, and the like. Further, the memory 902 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 902 may optionally include memory located remotely from the processor 901, which may be connected to the processor 901 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

One or more modules are stored in the memory 902, which when executed by the processor 901 performs the methods in the above-described method embodiments.

The specific details of the electronic device may be understood by referring to the corresponding related descriptions and effects in the above method embodiments, and are not described herein again.

Those skilled in the art will appreciate that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, and the related programs can be stored in a computer readable storage medium, and when executed, the processes of the embodiments including the methods described above can be implemented. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, HDD), a Solid-State Drive (SSD), or the like; the storage medium may also comprise a combination of memories of the kind described above.

Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A communication method applied to a satellite network is applied to an identification exchange router of a sending end, and is characterized by comprising the following steps:

receiving a data packet sent by a sending end, and extracting a data sending request of the sending end according to the data packet;

distributing corresponding mapping items to a sending end according to a preset access control strategy, wherein the mapping items are used for representing the mapping relation between an access identifier and a route identifier of the sending end;

updating the mapping entries according to a preset movement rule;

sending the updated mapping item and the data sending request to an identification mapping server;

receiving a current mapping item of a receiving end fed back by the identifier mapping server, wherein the current mapping item is obtained by the identifier mapping server according to the data sending request and is between the receiving end and an identifier switching router corresponding to the receiving end;

sending the data packet to an identification exchange router corresponding to the receiving end according to the current mapping item;

the identification exchange router maintains two mapping tables, namely a local access mapping table and a remote access mapping table; the local access mapping table stores mapping items corresponding to users accessing the satellite network through the current identification exchange router, the remote access mapping table stores mapping items corresponding to opposite users needing communication of the local access users, and for the local access mapping table: each identification exchange router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, an access user in the mapping table is a user stored in a local access mapping table of the first time interval in the previous identification exchange router reaching the current position, and the corresponding routing identifications are all the routing identifications corresponding to the current identification exchange router; for the remote access mapping table: each label switching router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, a correspondent user in the mapping table is a user stored in the mapping table for the remote access of the first time interval in the previous label switching router reaching the current position, a route label corresponding to the correspondent user needs to be obtained by requesting the label mapping server, and the updating of the mapping items according to the preset movement law includes: and transferring the mapping entries in the local access mapping table of the first time period into the remote access mapping table of the second time period, and converting the corresponding routing identifiers into the routing identifiers corresponding to the next identifier switching router reaching the current position, wherein the first time period is the current time period, and the second time period is the next time period.

2. The communication method applied to the satellite network according to claim 1, further comprising:

receiving a first confirmation notification sent by the identifier mapping server, wherein the first confirmation notification is a notification that the identifier mapping server confirms whether the updated mapping entry is correct or not;

and sending a first reply notification to the identifier mapping server according to the first confirmation notification.

3. A communication method applied to a satellite network is applied to an identification mapping server and is characterized by comprising the following steps:

receiving an updated mapping entry and a data sending request sent by an identifier switching router corresponding to a sending end, where the mapping entry is used to represent a mapping relationship between an access identifier and a routing identifier of the sending end, and an updating process of the updated mapping entry is as follows: the identification exchange router corresponding to the sending end updates the mapping items according to a preset movement rule, and maintains two mapping tables, namely a local access mapping table and a remote access mapping table; the local access mapping table stores mapping items corresponding to users accessing the satellite network through the current identification exchange router, the remote access mapping table stores mapping items corresponding to opposite users needing communication of the local access users, and for the local access mapping table: each identification exchange router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, an access user in the mapping table is a user stored in a local access mapping table of the first time interval in the previous identification exchange router reaching the current position, and the corresponding routing identifications are all the routing identifications corresponding to the current identification exchange router; for the remote access mapping table: each label switching router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, a correspondent user in the mapping table is a user stored in the mapping table for the remote access of the first time interval in the previous label switching router reaching the current position, a route label corresponding to the correspondent user needs to be obtained by requesting the label mapping server, and the updating of the mapping items according to the preset movement law includes: transferring the mapping entries in the local access mapping table of the first time period to the remote access mapping table of the second time period, and converting the corresponding routing identifiers into the routing identifiers corresponding to the next identifier switching router reaching the current position, wherein the first time period is the current time period, and the second time period is the next time period;

acquiring receiving end information from the data sending request, and sending a current mapping item acquisition request to an identification exchange router corresponding to a receiving end according to the receiving end information, wherein the current mapping item is a current mapping item between the receiving end and the identification exchange router corresponding to the receiving end, which is acquired by the identification mapping server according to the data sending request;

receiving a current mapping item sent by an identification exchange router corresponding to the receiving end;

and sending the current mapping item to an identifier switching router corresponding to the sending end.

4. The communication method applied to the satellite network according to claim 3, further comprising:

judging whether the updated mapping item is correct or not;

when the updated mapping item is correct, sending a first confirmation notice with a correct type to the identifier switching router corresponding to the sending end, and when the updated mapping item is incorrect, sending a first confirmation notice with an incorrect type to the identifier switching router corresponding to the sending end;

and receiving a first reply notification sent by the identity switching router corresponding to the sending end, wherein the first reply notification is a reply of the identity switching router corresponding to the sending end to the first confirmation notification.

5. The communication method applied to the satellite network according to claim 3, wherein when the current mapping entry is the updated mapping entry, the method further comprises:

judging whether the current mapping item is correct or not;

when the current mapping item is correct, sending a second confirmation notice with the correct type to the identification exchange router corresponding to the receiving end, and when the current mapping item is incorrect, sending a second confirmation notice with the incorrect type to the identification exchange router corresponding to the receiving end;

and receiving a second reply notification sent by the identification exchange router corresponding to the receiving end, wherein the second reply notification is a reply of the identification exchange router corresponding to the receiving end to the second confirmation notification.

6. A communication method applied to a satellite network is applied to an identification exchange router of a receiving end, and is characterized by comprising the following steps:

receiving a current mapping item acquisition request sent by an identifier mapping server;

sending a current mapping item to an identifier mapping server, wherein the current mapping item is used for representing a mapping relation between an access identifier and a route identifier of a receiving end;

receiving a data packet sent by an identification exchange router corresponding to a sending end, wherein the data packet is sent by the identification exchange router corresponding to the sending end according to the current mapping item;

sending the data packet to the receiving end;

after receiving a current mapping entry obtaining request sent by the identifier mapping server, before sending the current mapping entry to the identifier mapping server, the method further includes:

updating a mapping item in a mapping table according to a preset movement rule, wherein the mapping item is used for representing a mapping relation between an access identifier and a route identifier of a receiving end;

determining the updated mapping entry as the current mapping entry;

7. The communication method applied to the satellite network according to claim 6, further comprising, after updating the mapping entries in the mapping table according to the preset movement law:

receiving a second confirmation notification sent by the identifier mapping server, wherein the second confirmation notification is a notification that the identifier mapping server confirms whether the current mapping item is correct or not;

and sending a second reply notification to the identifier mapping server according to the second confirmation notification.

8. A communication device applied to a satellite network, applied to an identifier switching router of a transmitting end, comprising:

the first receiving module is used for receiving a data packet sent by a sending end and extracting a data sending request of the sending end according to the data packet;

the first processing module is used for allocating corresponding mapping items to a sending end according to a preset access control strategy, wherein the mapping items are used for representing the mapping relation between an access identifier and a route identifier of the sending end;

the second processing module is used for updating the mapping items according to a preset movement rule, and the identifier switching router maintains two mapping tables, namely a local access mapping table and a remote access mapping table; the local access mapping table stores mapping items corresponding to users accessing the satellite network through the current identification exchange router, the remote access mapping table stores mapping items corresponding to opposite users needing communication of the local access users, and for the local access mapping table: each identification exchange router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, an access user in the mapping table is a user stored in a local access mapping table of the first time interval in the previous identification exchange router reaching the current position, and the corresponding routing identifications are all the routing identifications corresponding to the current identification exchange router; for the remote access mapping table: each label switching router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, a correspondent user in the mapping table is a user stored in the mapping table for the remote access of the first time interval in the previous label switching router reaching the current position, a route label corresponding to the correspondent user needs to be obtained by requesting the label mapping server, and the updating of the mapping items according to the preset movement law includes: transferring the mapping entries in the local access mapping table of the first time period to the remote access mapping table of the second time period, and converting the corresponding routing identifiers into the routing identifiers corresponding to the next identifier switching router reaching the current position, wherein the first time period is the current time period, and the second time period is the next time period;

the first sending module is used for sending the updated mapping entries and the data sending requests to the identifier mapping server;

a second receiving module, configured to receive a current mapping entry of a receiving end, where the current mapping entry is obtained by the identifier mapping server according to the data sending request, and is between the receiving end and an identifier switching router corresponding to the receiving end;

and the second sending module is used for sending the data packet to the identifier switching router corresponding to the receiving end according to the current mapping entry.

9. A communication device applied to a satellite network, applied to an identifier mapping server, comprising:

a third receiving module, configured to receive an updated mapping entry and a data sending request sent by an identifier switching router corresponding to a sending end, where the mapping entry is used to represent a mapping relationship between an access identifier and a routing identifier of the sending end, and an updating process of the updated mapping entry is as follows: the identification exchange router corresponding to the sending end updates the mapping items according to a preset movement rule, and maintains two mapping tables, namely a local access mapping table and a remote access mapping table; the local access mapping table stores mapping items corresponding to users accessing the satellite network through the current identification exchange router, the remote access mapping table stores mapping items corresponding to opposite users needing communication of the local access users, and for the local access mapping table: each identification exchange router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, an access user in the mapping table is a user stored in a local access mapping table of the first time interval in the previous identification exchange router reaching the current position, and the corresponding routing identifications are all the routing identifications corresponding to the current identification exchange router; for the remote access mapping table: each label switching router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, a correspondent user in the mapping table is a user stored in the mapping table for the remote access of the first time interval in the previous label switching router reaching the current position, a route label corresponding to the correspondent user needs to be obtained by requesting the label mapping server, and the updating of the mapping items according to the preset movement law includes: transferring the mapping entries in the local access mapping table of the first time period to the remote access mapping table of the second time period, and converting the corresponding routing identifiers into the routing identifiers corresponding to the next identifier switching router reaching the current position, wherein the first time period is the current time period, and the second time period is the next time period;

a third sending module, configured to obtain receiving end information from the data sending request, and send a current mapping entry obtaining request to an identifier switching router corresponding to a receiving end according to the receiving end information, where the current mapping entry is a current mapping entry between the receiving end and the identifier switching router corresponding to the receiving end, where the current mapping entry is obtained by the identifier mapping server according to the data sending request;

a fourth receiving module, configured to receive a current mapping entry sent by an identifier switching router corresponding to the receiving end;

and the fourth sending module is configured to send the current mapping entry to the label switching router corresponding to the sending end.

10. A communication device applied to a satellite network, applied to an identifier switching router at a receiving end, comprising:

a fifth receiving module, configured to receive a current mapping entry obtaining request sent by an identifier mapping server, where the current mapping entry is a current mapping entry between the receiving end and an identifier switching router corresponding to the receiving end, where the current mapping entry is obtained by the identifier mapping server according to the data sending request; updating a mapping item in a mapping table according to a preset movement rule, wherein the mapping item is used for representing a mapping relation between an access identifier and a route identifier of a receiving end; determining the updated mapping entry as the current mapping entry;

a fifth sending module, configured to send the current mapping entry to the identifier mapping server, where the identifier switching router maintains two mapping tables, namely a local access mapping table and a remote access mapping table; the local access mapping table stores mapping items corresponding to users accessing the satellite network through the current identification exchange router, the remote access mapping table stores mapping items corresponding to opposite users needing communication of the local access users, and for the local access mapping table: each identification exchange router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, an access user in the mapping table is a user stored in a local access mapping table of the first time interval in the previous identification exchange router reaching the current position, and the corresponding routing identifications are all the routing identifications corresponding to the current identification exchange router; for the remote access mapping table: each identification exchange router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, a communication opposite-end user in the mapping table is a user stored in the mapping table for the remote access of the first time interval in the previous identification exchange router reaching the current position, a route identification corresponding to the communication opposite-end user needs to request an identification mapping server for obtaining, and a mapping item is updated according to a preset movement rule, wherein the mapping table comprises the following steps: transferring a mapping entry in a local access mapping table of a first time period into a remote access mapping table of a second time period, converting a corresponding route identifier into a route identifier corresponding to an identifier switching router which reaches a current position next time, wherein the first time period is the current time period, the second time period is the next time period, and the mapping entry is used for representing a mapping relation between an access identifier and a route identifier of a sending end;

a sixth receiving module, configured to receive a data packet sent by an identity switching router corresponding to a sending end, where the data packet is sent by the identity switching router corresponding to the sending end according to the current mapping entry;

and the sixth sending module is used for sending the data packet to a receiving end.

11. A communication system for use in a satellite network, comprising: the system comprises a sending end, a first identification exchange router, an identification mapping server, a second identification exchange router and a receiving end:

the sending end is used for sending a data packet to the first identifier switching router;

the first identification exchange router is used for receiving a data packet sent by a sending end; extracting a data transmission request according to a data packet transmitted by a transmitting end; allocating mapping items to the newly accessed sending end according to a preset strategy; updating the mapping entries in the mapping table according to a preset movement rule; sending the updated mapping item and the data sending request to an identifier mapping server, wherein the mapping item is used for representing the mapping relation between the access identifier and the routing identifier of the sending end; the identification exchange router maintains two mapping tables, namely a local access mapping table and a remote access mapping table; the local access mapping table stores mapping items corresponding to users accessing the satellite network through the current identification exchange router, the remote access mapping table stores mapping items corresponding to opposite users needing communication of the local access users, and for the local access mapping table: each identification exchange router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, an access user in the mapping table is a user stored in a local access mapping table of the first time interval in the previous identification exchange router reaching the current position, and the corresponding routing identifications are all the routing identifications corresponding to the current identification exchange router; for the remote access mapping table: each label switching router maintains two mapping tables of a first time interval and a second time interval, in the second time interval, a correspondent user in the mapping table is a user stored in the mapping table for the remote access of the first time interval in the previous label switching router reaching the current position, a route label corresponding to the correspondent user needs to be obtained by requesting the label mapping server, and the updating of the mapping items according to the preset movement law includes: transferring the mapping entries in the local access mapping table of the first time period to the remote access mapping table of the second time period, and converting the corresponding routing identifiers into the routing identifiers corresponding to the next identifier switching router reaching the current position, wherein the first time period is the current time period, and the second time period is the next time period;

the identification mapping server receives updated mapping entries and data sending requests sent by a first identification exchange router corresponding to a sending end; acquiring receiving end information from the data sending request, and sending a current mapping item acquisition request to a second identifier switching router corresponding to a receiving end according to the receiving end information;

the second label switching router is used for receiving a current mapping item acquisition request sent by the label mapping server; sending a current mapping item to an identification mapping server, wherein the current mapping item is obtained by the identification mapping server according to the data sending request and is between the receiving end and an identification exchange router corresponding to the receiving end;

the identifier mapping server is further configured to receive a current mapping entry sent by an identifier switching router corresponding to the receiving end; sending the current mapping item to a first identifier switching router corresponding to the sending end;

the first identification exchange router is also used for receiving the current mapping item of the receiving end fed back by the identification mapping server; sending the data packet to a second identifier switching router corresponding to the receiving end according to the current mapping item;

the second label switching router is also used for receiving a data packet sent by the first label switching router corresponding to the sending end; and sending the data packet to the receiving end.

12. An electronic device, comprising:

a memory and a processor, the memory and the processor are connected with each other in communication, the memory stores computer instructions, the processor executes the computer instructions, thereby executing the communication method applied to the satellite network according to any one of claims 1 to 7.

13. A computer-readable storage medium storing computer instructions for causing a computer to execute the communication method applied to the satellite network according to any one of claims 1 to 7.