Method and terminal for realizing business in GSM and 3G network coexisted network

Abstract

The terminal accomplishes following steps: when being started up, through guidance of message of GSM network system and message of 3G network system, the terminal resides GSM network first; after detected user initiated service type being as 3G feature service, and 3G signal, the terminal starts up cell reselection between systems first; after reselecting 3G network, the terminal initiates request of 3G feature service to 3G network. The invention also discloses terminal implements services in coexistent network between GSM and 3G network. Under condition of incomplete coverage of 3G network, the invention implements voice service and 3G feature services preferably.

Description

technical field [0001] The present invention relates to communication technology, in particular to a method and a terminal for realizing services in a network where the Global System for Mobile Communications (GSM) and the third generation mobile communication (3G) network coexist. Background technique [0002] After years of development and construction, the GSM network has achieved relatively high coverage. In the initial stage of 3G network construction, it is difficult for the 3G network to achieve continuous nationwide coverage in one step, and it is also difficult to achieve the coverage rate of GSM in the coverage area. In places where the 3G network cannot cover, it is still necessary to use the GSM network to provide services for 3G users and maintain business continuity requirements. The 3G network includes Wideband Code Division Multiple Access (WCDMA) network, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) network, CDMA2000 network and so on....

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Problems solved by technology

[0014] The disadvantage of this solution is: the GSM network needs to be upgraded so that the GSM network can recognize the 3G characteristic service request and can support the signaling of the 3G characteristic service; and because the GSM network is required to be able to order the terminal to perform different system measurements, it must be identified and judged The different system measurement report reported by the terminal, and the handover target cell can be determined according to the above measurement report, so the upgrade workload of the GSM network is relatively large

When a user initiates a 3G special service, the GSM network needs to establish signaling for the 3G special service, and the user also needs to wait for the GSM network to order the terminal to measure different systems and switch the terminal to the target cell according to the measurement report. Therefore, the user initiates a 3G special service. The access delay affects the user's experience

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