Abstract text

The present invention discloses a method for triggering tracking area update in packet switched wireless system that includes equivalent tracking areas. The method includes: S302, configuring, managing and/or updating one or more tracking area identifier pool(s) in a control plane function entity, wherein, each tracking area identifier pool corresponds to a group of equivalent tracking areas, the tracking area identifier pool includes all the tracking area identifiers of the corresponding equivalent tracking areas; S304, when UE registers in a network successfully, the control pan function entity sends the tracking area identifier pool(s) to the UE; S306, during the moving of the user equipment, the user equipment judges whether the current tracking area identifier which is broadcasted by the packet switched wireless system is not identical with any one of all the tracking area identifiers in the tracking area identifier pools stored in the user equipment; if so, triggering the process of tracking area update.