Multimode wireless terminal and method for updating its location area

Abstract

The invention relates to the field of wireless communication, and discloses a multimode wireless terminal and a location area updating method thereof. In the invention, the method comprises the following steps: when a second communication mode is at an idle state, monopolizing a first antenna group at a first communication mode, sharing a second antenna group at the first communication mode and the second communication mode, receiving system information from a network side through the shared second antenna group at the second communication mode, and judging whether the location area of the second communication mode is changed; if the location area at the second communication mode is changed, completing the updating of the location area at the second communication mode to the network side through the first communication mode. According to the multimode wireless terminal and the location area updating method thereof, frequent updating of the location area at the second communication mode during dropping of the existing circuit domain is eliminated, thus the circuit domain dropping call establishment delay is greatly reduced, and concurrent data communication can be realized through the first communication mode when the second communication mode is incapable of supporting concurrency of voice and data service.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a multi-mode wireless terminal. Background technique [0002] With the vigorous development of various Internet applications, the existing third-generation (3G, 3Generation) communication network can no longer meet the growing needs of people. The wireless communication system is increasingly showing the development trend of mobility, broadband and Internet. Under this situation, LTE (Long Term Evolution, 3GPP (Third Generation Partnership Project) as the fourth generation (4G, 4Generation) communication technology long-term evolution project) will become the direction of network evolution in the future. [0003] The LTE network is based on the Internet Protocol (IP, Internet Protocol) architecture, and can only provide voice over IP (VoIP, Voice over IP) services based on the packet domain (PS, Packet Switched). and service control capabilities, so it is necessary to prov...

AI Technical Summary

Problems solved by technology

Compared with the traditional 2G / 3G voice call, when the terminal falls back from LTE to the 2G / 3G network in the CSFB scheme, there are additional processes such as measurement, synchronization and system message reading of the 2G / 3G target cell, even including location area update ( LU) process, resulting in an increase of call connection delay of 1 to 4 seconds, resulting in a long call connection time or even more than 10 seconds, and poor user experience

In addition, the call setup time increases, and there is a risk of a reduced call setup success rate;

[0007] (2) It takes a long time to return to LTE after the call ends

After the voice service ends on the 2G / 3G network, it returns to the LTE network through reselection. There is a second-level unreachable time, and the terminal cannot perform communication services, which affects user experience;

[0008] (3) If GSM (Global System of Mobile Communication, Global System for Mobile Communication) is dropped, voice and data services cannot be concurrent

[0009] (3) If GSM is dropped back, since the voice and data services cannot be concurrent, the calling and called services of the PS cannot be carried out

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