Method and equipment for switching communication service between systems

Abstract

The invention discloses a method and equipment for switching a communication service between systems. The method comprises the following steps of: judging whether user equipment which establishes the communication service is in a cell forward access channel state or not; if the user equipment is in the cell forward access channel state, judging whether the communication service needs born in a global system for mobile communications (GSM) or not when a core network initiates the wireless access bearer establishment of the communication service; and if the communication service needs born in the GSM, triggering the switching, between a communication system which establishes the communication service and the GSM, of the communication service, and establishing the communication service in the GSM. Due to the adoption of the method, the defect that, in the prior art, a switching process between the systems cannot be performed when the user equipment is in the cell forward access channel state can be overcome; switching time delay can be reduced; and the technical effect of avoiding dropped calls of the user equipment can be achieved. In addition, as the user equipment can be switched into the GSM directly while the service is established, strategies of the network can be more flexible.

Description

technical field [0001] The invention relates to wireless communication technology, in particular to a method and equipment for switching communication services between systems. Background technique [0002] figure 1 It is a schematic diagram of the principle of wireless access equipment. As shown in the figure, NodeB is a base station, and RNC (Radio Network Controller) is a radio network controller. The two are collectively called RAN (Radio Access Network, radio access network) or radio access subsystem. The RAN is a part between UE (User Equipment, user equipment) and CN (Core Network, core network), and is connected to the core network through an Iu interface. NodeB can handle one or more cells, and connect with RNC through Iub interface. The RNC is responsible for handover control and provides user mobility management functions supporting different cells. The base station transmits data with the UE through the Uu interface. [0003] In the 3G system, when a user ini...

AI Technical Summary

Problems solved by technology

[0036] The present invention provides a method and equipment for switching communication services between systems to solve the problem in the prior art that UEs in the CELL FACH state perform inter-system switching

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