System for implementing mobile communication based on WCDMA core network and terminal access method

Abstract

The invention discloses a system for implementing mobile communication based on a WCDMA (Wideband Code Division Multiple Access) core network and a terminal access method. The system comprises a wireless access network, a service GPRS (General Packet Radio Service) node (SGSN Serving GPRS Supporting Node), a gateway GPRS node (GGSN Gateway GPRS Supporting Node), and an identity location register (ILR) connected with the SGSN and/or the GGSN, wherein the GGSN is used for maintaining the session connection of a terminal, allocating an RID (Radio Identifier) to the terminal, directly or indirectly inquiring the RID of a communication end to the ILR, maintaining Access Identifiers (AID) and RID mapping information of the terminal and the communication end, implementing the routing and forwarding of data messages and controlling the cross-GGSN switching of the terminal; the SGSN or the GGSN is used for registering and deregistering the RID of the terminal to the ILR; and the ILR is used for receiving a registering request and a deregistering request to a home subscriber terminal thereof, maintaining AID-RID mapping information of the home subscriber terminal, receiving an inquiry request to the RID of the terminal and returning the RID in the request, corresponding to the AID of the terminal, to an inquiry requester.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a system for realizing mobile communication and a method for a terminal to access the system under the framework of a WCDMA core network system. Background technique [0002] The existing WCDMA system is currently an important system and method for realizing service access based on the wireless WCDMA technology. Its core network architecture is as Figure 1a shown. [0003] In order to complete the effective access of users, the system defines the following important functions: [0004] ●Network access control function [0005] ● Packet routing and forwarding function [0006] ●Mobility management function [0007] ● Logical link management function [0008] ●Radio resource management function [0009] ●Network management function [0010] Among them, the functional parts related to the present invention include network access control, packet routing and forwarding, and...

AI Technical Summary

Problems solved by technology

[0081] Problem 1: The GGSN remains unchanged, and there are routing detours

In this way, when the user moves, it is possible to move to a place far away from the GGSN but closer to the service source, resulting in a circuitous path

[0083] Problem 2: Data services are routed according to IP addresses, while user terminals use dynamic IP addresses, which affects user accessibility

In this way, sending services according to the IP address of the terminal will be limited to the time of one connection

However, if you want to send data services for terminals for a long time, you can only use static public IP addresses, so dynamic IP addresses have shortcomings in finding users

[0085] Question 3: Using a static public address as the IP address of the terminal will greatly restrict the mobility of users

Once moved to a far away place, it is impossible to access the external network nearby

detour

[0087] Problem 4: The mobility management process for business continuity is complex

[0089] Question 5: Multiple connections cause the use of multiple IP addresses, and the terminal needs to support multiple IP addresses

[0092] However, there is no corresponding implementation plan for how to implement a communication network with an identity and location separation architecture based on the WCDMA system

Images