Method, device and system for realizing optimized switching of network

Abstract

The invention discloses a method, a device and a system for realizing the optimized switching of a network. The method comprises the steps of: when user equipment or a source network confirms to initiate the switching preparation to a target network, querying a corresponding target network identification from a configured mapping relation by a mobility management entity according to a received cell identification so as to confirm an access node of the target network; establishing the connection to a target network service gateway and instructing or instructing, by the service gateway, a packet data network gateway to process the uplink and downlink data channels of a user interface; after accomplishing the connection to the service gateway, initiating a resource reserving request of the access node of the target network by the mobility management entity, and instructing not to establish the air interface connection; and after accomplishing the switching preparation, instructing, by the mobility management entity or the service gateway, the packet data network gateway to switch the uplink and downlink data channels of the user interface to the target network. Through the application of the invention, the continuity of the service can be ensured and the user experience can be improved when the user equipment is switched from the source network to the target network.

Description

[0001] This application is a divisional application of the original application with the application date of November 9, 2007, the application number "200710169584.5", and the invention titled "A Method, Equipment and System for Realizing Network Optimal Handover". technical field [0002] The invention relates to network switching technology, in particular to a method, device and system for realizing network optimal switching. Background technique [0003] Traditional telecommunication networks, especially wireless communication networks, such as Global System for Mobile Communications (GSM, Global System for Mobile communications) and Universal Mobile Telecommunications System (UMTS, Universal Mobile Telecommunications System), have the advantages of rich business types and strong network control capabilities. , has been widely used. With the continuous development and improvement of network technology, users have higher requirements for the rate of data services. However,...

AI Technical Summary

Problems solved by technology

[0041] 1. In the existing process, data needs to be cached in E-UTRAN during the handover preparation stage, but in the process, there is no description about MME determining E-UTRAN;

[0042] 2. In the existing process, there is no specific description for the process of establishing a connection between MME and E-UTRAN;

[0043] 3. The existing process does not clearly describe how and when the connection between S101 and S5 is established;

However, in the existing process, when an early path switch is performed in the handover preparation phase (that is, before the UE is handed over to the target network, the PDN GW is bound to the target network), the data transmission in the uplink and downlink directions will be switched to The target network, thus interrupting the data transmission in the Uplink direction, resulting in the interruption of the service at the service layer; moreover, it cannot guarantee the lossless data transmission in the Uplink direction;

[0045] 5. When performing an early path switch, in the existing process, how to establish a default bearer and a dedicated bearer during the switching process is not described;

[0046] 6. In the case of applying policy and charging control (PCC, Policy and Charging Control), how to apply the PCC rule (PCC Rule) to realize the control of the source network and the target network during the handover process of the network anchor (Anchor) ( Such as billing control) and other issues are not described

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