Method and system of improving call completing rate of mobile communication terminal

Abstract

The invention relates to a method and a system of improving the call completing rate of a mobile communication terminal and a system. The method comprises the following steps: a request of circuit exchange CS request service is initiated in the terminal, and the CS conversation service building process is conducted between networks; during the period that in the CS conversation service building process, the terminal successively transmits a data package of the conversation service building request, but a radio link control (RLC) layer of the terminal does not receive a confirmed package which is replied by the networks, and a small region of the terminal is detected to be changed; whether the small region is a cross-position region or not is judged in a higher layer protocol of the terminal; when the small region change is the cross-position region, the service request is suspended and retransmitted in a radio resource control (RRC) layer of the terminal and suspending indications are reported to a non-access network access server (NAS) layer of the terminal; position region updating is initiated in the NAS layer; and when the position region updating is finished, the CS domain service request is retransmitted in the NAS layer so as to build CS communications with the networks.

Description

technical field [0001] The invention relates to a mobile communication terminal, in particular to a method and a system for improving the connection rate of a mobile communication terminal. Background technique [0002] As the basic service of mobile communication, voice call is directly related to the user experience, and the inevitable multi-process concurrent scene in mobile communication has a certain impact on the completion rate of voice call. [0003] For example, in a scenario of a TD-SCDMA system, a mobile communication terminal initiates a Circuit Switch (CS) voice service establishment request in the Packet Switch (PS) connection state, and sends a Non-Access Stratum (Non-Access Layer) Stratum, NAS) initial direct message. Before receiving a radio link control (Radio Link Control, RLC) acknowledgment packet from the peer layer, cell handover in the TD system occurs. After the handover is completed, the high-level protocol stack of the terminal will resend the NA...

AI Technical Summary

Problems solved by technology

[0004] If cell handover or reselection across location areas occurs in the above two scenarios, since the mobility management module (Mobility Management, MM) is not in the idle state, the location area update will not be performed immediately, and the core network receives The CS domain initial direct transfer message sent by the terminal in the new location area, judging that the terminal is not registered in the location area, will consider the International Mobile Subscriber Identification Number (IMSI) invalid, resulting in the failure of the service establishment

[0005] The problems in these two scenarios also exist when the user initiates a video call service

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