Dynamic post-routing implementation method under hybrid networking of terminal ad hoc network and 5G network

Abstract

The invention discloses a dynamic post-routing implementation method under hybrid networking of a terminal ad hoc network and a 5G network, and relates to the field of 5G communication. According to the invention, the ad hoc network module of the terminal regularly sends the ping packet to the fixed address of the 5G core network, the core network takes out the source address of the ping packet after receiving the ping packet in the N3 tunnel corresponding to the 5G terminal session, stores the association relationship between the address and the 5G terminal in the post-routing information table and synchronizes the association relationship between the sites, thereby realizing the dynamic updating of the post-routing information, and improving the dynamic updating efficiency of the post-routing information. And the method is suitable for dynamic network change scenes.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of 5G communication, and particularly relates to a dynamic post-routing implementation method under terminal ad hoc network and 5G network hybrid networking. BACKGROUND

[0002] The terminal ad hoc network is a network formed by terminal devices themselves, which does not depend on any preset network infrastructure, but makes each terminal device act as both a sender and a receiver of information and also bear the function of a router responsible for forwarding information for other terminal devices. The terminal ad hoc network has advantages of decentralization, no infrastructure dependence, and instant use, but is limited in bandwidth and transmission distance, and is usually applicable to temporary scenes without network coverage. Compared with the 4G network, the 5G network has characteristics of high speed, large capacity, low latency, high reliability, and massive connection, so that the 5G network is increasingly applied in special private networks. In the private network, the terminal forms an ad hoc network in a place where the 5G signal cannot be covered, so as to ensure the communication ability in the place without 5G network coverage.

[0003] The post-routing technology of the 5G network, i.e., the 5G core network has a route to the terminal hanging device. The core of the post-routing technology is that the 5G core network generates and maintains a special routing table, which records the address information of each 5G terminal and all devices hanging under the terminal. When an external network needs to send data to a terminal hanging device, the core network will query the routing table and send the data to the 5G terminal to which the target device belongs, and the 5G terminal will forward the data packet to the destination device. In the 3GPP protocol standard, the post-routing information cannot be transmitted through the signaling interaction between the terminal and the core network, and is usually configured in the user subscription data of the core network UDM network element. When the 5G terminal hanging device moves, the core network cannot dynamically perceive the post-routing information. SUMMARY

[0004] Therefore, the application provides a dynamic post-routing implementation method under terminal ad hoc network and 5G network hybrid networking. The method realizes dynamic updating of the post-routing information and is suitable for a scene with dynamic network change.

[0005] In order to achieve the above purpose, the technical scheme adopted by the application is as follows:

[0006] The dynamic post-routing implementation method under terminal ad hoc network and 5G network hybrid networking comprises the following steps.

[0007] Step 1: a 5G terminal working in 5G mode and ad hoc network mode is accessed to the 5G network;

[0008] Step 2: a terminal in the terminal ad hoc network periodically sends a ping packet to the 5G core network;

[0009] Step 3: After receiving a ping packet destined for a specified address, the 5G core network extracts the source address of the ping packet and stores the association between that address and the 5G terminal in the post-routing information table;

[0010] Step 4: The 5G core network announces the subsequent routing information to other sites;

[0011] Step 5: After receiving the routing announcement, other sites in the 5G core network update their local routing information tables for subsequent data forwarding and addressing.

[0012] Due to the adoption of the above technical solution, the beneficial effects of this invention compared with the prior art are as follows:

[0013] The present invention provides a dynamic post-routing implementation method for hybrid networking scenarios of terminal ad hoc networks and 5G networks. It cleverly utilizes the network reachability message detection characteristics and combines them with the principles of post-routing itself to achieve dynamic post-routing generation and maintenance in the face of dynamic network changes in hybrid networking. This overcomes the limitations of static post-routing configuration and solves the problem of dynamic updating of post-routing information when the network topology changes dynamically in hybrid networking scenarios of terminal ad hoc networks and 5G networks. Compared with the traditional OSPF dynamic routing protocol, this method is simple and efficient, greatly reducing message exchange content, improving bandwidth utilization, reducing code size, shortening the functional development cycle, and saving deployment and manpower costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the network architecture of the terminal self-organizing network and 5G network hybrid networking method in the embodiment of the present invention.

[0015] Figure 2 This is a schematic diagram of the dynamic post-routing implementation process in an embodiment of the present invention. Detailed Implementation

[0016] The invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] Dynamic post-routing implementation methods under hybrid networking of terminal self-organizing networks and 5G networks, such as... Figure 2 As shown, it includes the following steps:

[0018] Step 1: A 5G terminal that works simultaneously in 5G mode and self-organizing network mode accesses the 5G network and successfully establishes a session in the 5G core network.

[0019] Step 2: Terminals within the self-organizing network periodically send ping packets to the 5G core network. The sending period and the destination address of the ping packets can be configured with different values ​​according to requirements.

[0020] Step 3: After receiving a ping packet, the 5G core network extracts the source address of the ping packet and stores the association between this address and the 5G terminal in the post-routing information table. When the 5G core network receives ping packets for a certain period of time, it considers the terminal to be offline in the self-organizing network, deletes the association between the post-routing address and the 5G terminal from the local routing information table, and notifies other sites.

[0021] Step 4: The 5G core network announces the subsequent routing information to other sites, including the subsequent routing address and its relationship with the corresponding 5G core network;

[0022] Step 5: After receiving the routing advertisement, other sites in the 5G core network update their local routing information tables according to the routing advertisement type for subsequent data forwarding and addressing. Afterward, regardless of which site's 5G core network receives a data packet destined for the self-organizing network terminal, it can forward the data packet to the 5G terminal by querying its local routing information table. The 5G terminal then forwards the data to the self-organizing network terminal according to the self-organizing network routing rules.

[0023] like Figure 1 As shown, the terminals in current special applications are all dual-mode terminals (supporting both self-organizing network mode and 5G mode). When the terminal detects that 5G mode is unavailable, it automatically switches to self-organizing network mode, and it can also work in both 5G and self-organizing network modes simultaneously. The network architecture of the terminal's hybrid self-organizing network and 5G network in special applications is as follows: Figure 1 As shown in the diagram, 5G terminal 1 operates simultaneously in both self-organizing network mode and 5G mode. It accesses 5G site 1 using 5G mode and forms a terminal self-organizing network with self-organizing network terminal 1 and self-organizing network terminal 2 using self-organizing network mode. Self-organizing network terminal 1 and terminal 2 cannot find 5G signals and operate only in self-organizing network mode. When self-organizing network terminal 2 communicates with the service server, its routing information in the 5G core network is the route following that of 5G terminal 1. When the service server sends data to self-organizing network terminal 2, the core network queries this routing information and forwards the data to 5G terminal 1. After receiving the data packet, 5G terminal 1 forwards it to self-organizing network terminal 2 according to the internal routing rules of the self-organizing network. If communication is achieved using static routing configured in the core network UDM, when the location of self-organizing network terminal 2 moves and leaves its original self-organizing network to re-form a new self-organizing network with 5G terminal 2, when the service server sends data to self-organizing network terminal 2 again, the core network will still send the data to 5G terminal 1 based on the routing information without manual modification of the UDM data configuration, leading to data transmission errors. Therefore, this method uses the terminal's self-organizing network module to periodically send ping packets to a fixed address in the 5G core network. After receiving the ping packet in the N3 tunnel corresponding to the 5G terminal session, the core network extracts the source address of the ping packet, stores the association between this address and the 5G terminal in the post-routing information table, and synchronizes it between sites, thereby achieving dynamic updates of post-routing information and adapting to scenarios with dynamic network changes.

[0024] Those skilled in the art will recognize that the described embodiments are intended to help readers understand the principles of the invention and should be understood as not limiting the scope of protection of the invention to the described embodiments. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the scope of the claims of the invention.

Claims

1. A method for implementing dynamic post-routing in a hybrid network of terminal self-organizing network and 5G network, characterized in that, Includes the following steps: Step 1: Connect the 5G terminal that is working simultaneously in 5G mode and terminal self-organizing network mode to the 5G network; Step 2: Terminals within the self-organizing network periodically send ping packets to the 5G core network; Step 3: After receiving the ping packet, the 5G core network extracts the source address of the ping packet and stores the association between the address and the 5G terminal in the post-routing information table; Step 4: The 5G core network announces the subsequent routing information to other sites; Step 5: After receiving the routing announcement, other sites in the 5G core network update their local routing information tables for subsequent data forwarding and addressing.

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