Protocol stack software system of mobile terminal and method for searching mobile communication network

Abstract

A protocol stack software system of mobile terminal includes common user identification module management module, user interface module, non-access layer and access layer, wherein the non-access layer comprises a mobility management module for performing mobility management of the mobile terminal, characterized in that, the non-access layer also includes a network search module for controlling the selection of mobile communication network and controlling the register of the mobile terminal with the selected mobile communication network.; The protocol stack software system of the present invention separates network search function of the non-access layer, makes the structure of the non-access layer more clear, therein the network search module is special for controlling network search and cell residence procedure, while the mobility management module is for the management of the mobility and taking the responsibility for maintaining the connection of upper layer service. The present invention also provides a method of searching mobile communication network by mobile terminal having the above protocol stack software system.

Description

technical field [0001] The invention relates to a mobile terminal, in particular to a protocol stack software system in the mobile terminal and a method for the mobile terminal to search for a mobile communication network. Background technique [0002] At present, the protocol stack system of a mobile terminal can be divided into operating subsystem, Universal Subscriber Identity Module (USIM) management module, user interface module, non-access stratum (NAS) module, radio resource management module, link management module and Operation and maintenance modules, etc., wherein the functions of the NAS layer include: mobility management (MM / GMM), which is used to perform location registration of mobile terminals in mobile communication systems (including circuit switching communication systems and packet switching communication systems); call management, Used for negotiation of call signaling process and management of voice / data flow; supplementary service, used for registratio...

AI Technical Summary

Problems solved by technology

This solution does not give the difference between the mobile station's search network in different search network modes, nor does it specifically describe how to select other PLMNs

In addition, the function of the controller is limited to searching for PLMNs. It does not explain how to control the NAS layer to search and register the network, nor how to control the MM or GMM to initiate the registration of the location area after finding and camping on the network.

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