A mobility management method based on a routing advertisement protocol

Abstract

This invention presents a mobility management method based on a routing advertisement protocol. This method abstracts network devices into two functional entities: access devices and switching devices. Access devices assign user IP addresses, switching devices use dynamic routing protocols to establish a network, and access devices and switching devices use routing advertisement protocols to announce user IP addresses. When a user moves, the access device is switched. The old access device deletes the user's routing information using the routing advertisement protocol, while the new access device adds the user's routing information using the same protocol. The switching device updates the user's route across the entire network using dynamic routing protocols based on the routing advertisement protocol content. Thus, the user can achieve data communication with the network through the new access device. Throughout the user's movement, the user's IP address remains unchanged, ensuring uninterrupted service. This method eliminates the need for data tunneling encapsulation, resulting in higher data processing efficiency.

Description

Technical Field

[0001] This invention relates to a mobility management method based on a routing advertisement protocol in the field of mobile communications. This method is applicable to any communication system that needs to perform mobility management and maintain service continuity, and is used to ensure that terminal users can access the network from different access points during their travels without service interruption. Background Technology

[0002] With the development of communication technology, ensuring uninterrupted service during user mobility is a crucial issue in mobility management. Traditional mobile communication systems employ a tunnel-based solution, which uses data anchors. After a user sends data to the access device, the access device encapsulates the data using a tunnel and forwards it to the data anchor. The data anchor then decapsulates the data and forwards it to the actual destination address. When a user moves and changes access devices, the access device uses a new tunnel encapsulation to forward the data to the data anchor. This tunnel-and-anchor-based mobility management method can achieve seamless user experience and uninterrupted service, but it still has the following problems. First, the encapsulation and decapsulation of user data by the access device and data anchor significantly reduces data processing efficiency. Second, as a unified data processing center, a failure of the data anchor will cause data communication anomalies throughout the network. Therefore, this solution cannot be applied to distributed networks and cannot meet the needs of frequently changing mobile network topologies. Summary of the Invention

[0003] This invention addresses the problems of low data processing efficiency and poor scalability in traditional tunnel-based mobility management methods by designing a mobility management method based on a routing advertisement protocol.

[0004] The technical solution adopted in this invention is as follows:

[0005] A mobility management method based on a routing advertisement protocol includes the following steps:

[0006] (101) Configure an open interface between the access device and the switching device, use a dedicated routing announcement protocol for message exchange, and configure the address and port information of the connected switching device in the access device;

[0007] (102) After a user successfully joins the network, the registered access device assigns an IP address to the user and sends the user's IP address and access location information to the connected switching device in the form of a routing announcement message.

[0008] (103) After receiving a routing announcement message carrying an IP address, the switching device uses a dynamic routing protocol to synchronize the user's IP address and access location information to other switching devices, thereby enabling data communication between the switching device and the user.

[0009] (104) After a user moves, he or she accesses the network from a new access device. The old access device informs the connected switching device to delete the corresponding user IP address and access location information through a dedicated route advertisement message. The new access device informs the connected switching device to add the corresponding user IP address and access location information through a dedicated route advertisement message.

[0010] (105) The new access device connects to the switching device using a dynamic routing protocol to synchronize the user's IP address and access location information to other switching devices, and changes the next hop to the user's IP address from the old access device to the new access device. Subsequent data is sent to the user through the new access device.

[0011] Furthermore, the access device includes devices with wireless or wired access capabilities, and the switching device includes devices with routing and switching capabilities.

[0012] Furthermore, the routing advertisement message includes the advertisement type, index number, message content length, number of routes, operation type, and user IP address.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. This invention adopts the concept of route synchronization, which eliminates the need for tunnel encapsulation and decapsulation of data, making data processing more efficient.

[0015] 2. This invention abstracts the network into two parts: access devices and switching devices. The interfaces are easier to standardize and can be applied to heterogeneous access scenarios.

[0016] 3. This invention does not require data anchors, can be applied to distributed networks, and has stronger resilience. Attached Figure Description

[0017] Figure 1 This is a flowchart of the logic processing of the present invention.

[0018] Figure 2 This is a message flow diagram of the actual application of the present invention. Detailed Implementation

[0019] This invention abstracts network devices into two functional entities: access devices and switching devices. Access devices handle user IP allocation, switching devices use dynamic routing protocols to establish the network, and access devices and switching devices use routing announcement protocols to advertise user IP addresses. When a user moves, the access device is switched. The old access device deletes the user's routing information using the routing announcement protocol, while the new access device adds the user's routing information using the same protocol. The switching device updates the user's route across the entire network using dynamic routing protocols based on the routing announcement protocol content. Thus, the user can achieve data communication with the network through the new access device. Throughout the user's movement, the user's IP address remains unchanged, ensuring uninterrupted service.

[0020] Below, in conjunction with Figure 1 and Figure 2 The logical processing and specific applications of the present invention will be further explained.

[0021] Figure 1 The logical processing flow of this invention is described. It includes the following steps:

[0022] (101) Configure the address and port information of the connected switching devices on access device 1 and access device 2;

[0023] (102) The user first registers with access device 1 and activates the session. Access device 1 then assigns an IP address to the user.

[0024] (103) Access device 1 sends a route advertisement request message to switching device 1 to request the addition of route information.

[0025] (104) Switching device 1 sends a routing advertisement response message to access device 1 to confirm receipt of the routing advertisement request message;

[0026] (105) Switching device 1 initiates a dynamic routing update process between switching devices, and user IP address information and access location information are synchronized between different switching devices;

[0027] (106) When a user moves and disconnects from access device 1, they reconnect to the network from access device 2, and the user's IP address remains unchanged.

[0028] (107) Access device 1 detects that the user has disconnected and sends a route advertisement request message to switching device 1 to request the deletion of the route information;

[0029] (108) Switching device 1 sends a routing advertisement response message to access device 1 to confirm receipt of the routing advertisement request message;

[0030] (109) Switching device 1 initiates a dynamic routing update process between switching devices, and user IP address information is synchronized between different switching devices;

[0031] (110) Access device 2 sends a route advertisement request message to switching device 2, requesting the addition of route information;

[0032] (111) Switching device 2 sends a routing advertisement response message to access device 2 to confirm receipt of the routing advertisement request message;

[0033] (109) Switching device 2 initiates a dynamic routing update process between switching devices, and user IP address information and access location information are synchronized between different switching devices;

[0034] Figure 2 This describes the process by which the present invention, in practical applications, is integrated with a business system to ensure uninterrupted service during user mobility. Figure 2 The "business system" is a collective term for all business-related systems, including voice services and file transfer services; the arrows indicate the direction of message sending and receiving, and the text on the arrows describes the message type; the remaining explanatory text provides supplementary information about the entire processing procedure. Specifically, it includes the following steps:

[0035] (101) After a user accesses the network through access device 1, access device 1 assigns an IP address to the user. The switching devices obtain the user's device routing information through dynamic routing updates. The user establishes a connection with the business system using the IP address. The business system can achieve bidirectional data communication with access device 1.

[0036] (102) The user moves from access device 1 to access device 2;

[0037] (103) Access device 1 sends a route advertisement message (delete), and access device 2 initiates a route advertisement message (add);

[0038] (104) Dynamic routing updates are performed between switching devices. Switching device 3 updates the routing table, and data destined for users is sent to switching device 2 and then forwarded to users. Data sent by users to business systems is forwarded through access device 2. Throughout the process, the user's IP address does not change, so the service can remain continuous.

Claims

1. A mobility management method based on a routing advertisement protocol, characterized in that, Includes the following steps: (101) Configure an open interface between the access device and the switching device, use a dedicated routing announcement protocol for message exchange, and configure the address and port information of the connected switching device in the access device; (102) After a user successfully joins the network, the registered access device assigns an IP address to the user and sends the user's IP address and access location information to the connected switching device in the form of a routing announcement message. (103) After receiving a routing announcement message carrying an IP address, the switching device uses a dynamic routing protocol to synchronize the user's IP address and access location information to other switching devices, thereby enabling data communication between the switching device and the user. (104) After a user moves, he or she accesses the network from a new access device. The old access device informs the connected switching device to delete the corresponding user IP address and access location information through a dedicated route advertisement message. The new access device informs the connected switching device to add the corresponding user IP address and access location information through a dedicated route advertisement message. (105) The new access device connects to the switching device using a dynamic routing protocol to synchronize the user's IP address and access location information to other switching devices, and changes the next hop to the user's IP address from the old access device to the new access device. Subsequent data is sent to the user through the new access device.

2. The mobility management method based on the routing advertisement protocol according to claim 1, characterized in that, in, Access devices include devices with wireless or wired access capabilities, and switching devices include devices with routing and switching capabilities.

3. The mobility management method based on the routing advertisement protocol according to claim 1, characterized in that, The routing advertisement message includes the advertisement type, index number, message content length, number of routes, operation type, and user IP address.

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