Multi-mode terminal, CSFB realization method and GSM adjacent region information sheet maintenance method

A technology of a multi-mode terminal and an implementation method, which is applied in the field of communication and can solve the problems of delayed call initiation and prolonged call time.

Inactive Publication Date: 2017-04-05
MORNINGCORE TECH CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] In the above process, reading the GSM cell system information and the registration process of location area

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  • Multi-mode terminal, CSFB realization method and GSM adjacent region information sheet maintenance method
  • Multi-mode terminal, CSFB realization method and GSM adjacent region information sheet maintenance method
  • Multi-mode terminal, CSFB realization method and GSM adjacent region information sheet maintenance method

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Embodiment Construction

[0071] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and use imprecise ratios, which are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0072] The realization method of CSFB voice service of the present invention comprises:

[0073] S1: In the idle state of LTE, the multi-mode terminal reads the system information of the GSM neighbors with the N strongest signal strength and calculates the signal strength rlac that satisfies the resident signal according to the system information. In addition, it needs to save the LAI (Location Area ID). According to these The information constructs the GSM neighboring cell information table, as shown in Table ...

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Abstract

The invention provides a multi-mode terminal, and a CSFB voice business realization method; the multi-mode terminal reads system messages of a plurality of GSM adjacent regions under a LTE idle state, and obtains signal intensity satisfying residence conditions and each community location area ID according to the system messages, thus building a GSM adjacent region information sheet; the multi-mode terminal switches to the GSM network and carries a GSM frequency point list, carries out frequency sweeping, and preferably selects a GSM community as the candidate community according to the signal intensity obtained by frequency sweeping and the GSM adjacent region information sheet, wherein the selected community satisfies residence conditions, the system message of the selected community is read, and the selected community has the same ID with a residence LTE community location area ID; the multi-mode terminal returns to the selected community from the LTE mode to reside, and starts a calling process. The multimode terminal and the method can omit a residence GSM community system message reading process and a location area updating process, thus reducing calling delay. The invention also provides the GSM adjacent region information sheet maintenance method so as to timely update the information in the information sheet.

Description

technical field [0001] The invention relates to the communication field, in particular to a multimode terminal, a method for realizing a CSFB voice service and a method for maintaining a GSM adjacent cell information table. Background technique [0002] The LTE (Long Term Evolution, Long Term Evolution) network is an all-packet interactive network, but the voice service will still be an indispensable and important service for a long time. In order to ensure the smooth development of high-quality voice services on the LTE network, various standard organizations have actively studied and proposed a variety of voice service solutions. [0003] CSFB (Circuit Switched Fall Back, Circuit Switched Fall Back) is one of the achievements of the research topic in 3GPP R8. The background of this research project is that the wireless module of LTE and CS (Circuit Switched Domain, circuit interactive domain) multi-mode terminal is a single wireless mode, that is, it has LTE and UTRAN (UM...

Claims

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Application Information

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IPC IPC(8): H04W36/00H04W36/14H04W88/06
CPCH04W36/0061H04W36/0066H04W36/14H04W88/06
Inventor 张翁平孔世超孙翔
Owner MORNINGCORE TECH CO LTD
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