A method for switching among cells

Abstract

The invention discloses a method for realizing handover between cells. A control plane and a user plane protocol stack are respectively set up in a base station and a gateway. The target base station performs resource preparation; the target base station performs resource reservation, and establishes a new user plane with the gateway; after the new user plane establishment and resource reservation are completed, the inter-cell handover of the UE is completed, and the gateway performs path switching, and the The buffered data is sent to the target base station, and then information transmission is performed between the target base station and the UE. The invention solves the problems in the prior art, such as long inter-cell handover time delay, the source base station needing to stop data communication in advance, and information insecurity, etc., and also discloses a system for realizing inter-cell handover. The handover scheme of the present invention does not require the source base station to stop transmitting data in advance, does not bring long time delay, and ensures the security of data and signaling.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, more specifically to a method for realizing handover between cells in the third generation mobile communication system (3GPP). Background technique [0002] The Universal Mobile Telecommunications System (UMTS) is a 3GPP system that adopts Wideband Code Division Multiple Access (WCDMA) air interface technology, and the UMTS system is usually also referred to as a WCDMA communication system. The UMTS system adopts a structure similar to that of the second generation mobile communication system, and the UMTS system also includes a radio access network (RAN, Radio Access Network) and a core network (CN, Core Network). Among them, RAN is used to handle all wireless-related functions, and RAN is usually called Terrestrial Radio Access Network (UTRAN); CN handles all voice calls and data connections in the UMTS system, and realizes switching and routing with external networks Feat...

AI Technical Summary

Problems solved by technology

[0043] It can be seen from the above description that the above two architectural solutions currently proposed by the industry can be regarded as composed of base stations with RNC functions and new physical layer technologies and gateways with GGSN and some SGSN functions, and these two architectural solutions are both There is a problem that the soft handover delay is long because the source base station needs to send data to the target base station, and the source base station needs to stop data communication with the UE in advance

In addition, both schemes have data and signaling security issues

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