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PLMN (Public Land Mobile Network) network selecting method of multimode terminal

A multi-mode terminal and network technology, applied in access restriction, electrical components, wireless communication, etc., can solve the problems of increasing the demand for terminal content, increasing the cost of terminal hardware, and not reflecting the continuity of terminal software design, so as to simplify the terminal Design, effect of hardware cost reduction

Active Publication Date: 2011-07-06
SPREADTRUM COMM (SHANGHAI) CO LTD
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AI Technical Summary

Problems solved by technology

If a complete set of terminal LTE network modules is redesigned, the continuity of terminal software design cannot be reflected
[0020] Second: Redesign a set of PLMN network modules similar to GSM and TD-SCDMA dual-mode. Since each module has its own dedicated program area and variable use area, it will inevitably increase the terminal's demand for content and increase the terminal's hardware cost
[0021] Third: In the design of GSM, TD-SCDMA, and LTE three-mode terminal, the relationship between these three access technologies is not completely isolated, for example, one or two access technology modes are in the case of loss of coverage , will enable the third mode of PLMN selection, if GSM, TD-SCDMA and LTE are in different program modules, it will inevitably increase the complexity of task coordination between different modules, which is not conducive to the simplification of terminal design and the stability of terminal software code

Method used

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  • PLMN (Public Land Mobile Network) network selecting method of multimode terminal
  • PLMN (Public Land Mobile Network) network selecting method of multimode terminal
  • PLMN (Public Land Mobile Network) network selecting method of multimode terminal

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Embodiment Construction

[0043] In order to make the purpose, technical solution and advantages of the present invention clearer, a method for selecting a multi-mode terminal PLMN network according to the present invention will be further described in detail in conjunction with the accompanying drawings and embodiments below, and the known implementation methods will not be described in detail to avoid confusion. The content of the present invention is unnecessarily confusing.

[0044] Image 6 It is the overall flow chart of the preferred embodiment of GSM, TD-SCDMA and LTE multimode terminal PLMN network selection of the present invention (this embodiment selects LTE as the access mode), Figure 8 is the RRC cell selection flow chart, Figure 9 is a flow chart of the PLMN list process where RRC collects signals, Figure 10 It is the flow chart of the PLMNSelectionTable generation process in the NAS, and the specific process is described as follows:

[0045] First: After the three-mode terminal of...

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Abstract

The invention provides a PLMN (Public Land Mobile Network) network selecting method of a multimode terminal, comprising the steps: when an access mode is LTE (Long Term Evolution) and an access stratum (AS) is in PLMN searching, searched cells with signals are stored in the AS layer; the AS of the terminal leads PLMN_IdentityList of all the cells and signal intensity to form a PossiblePLMN(maxPlmnNum) list; all the lists are reported to a non-access stratum (NAS) together; the PLMN network selecting process of the LTE access technology is fused to the PLMN network selecting method of a GSM (Global System for Mobile Communication) and TD-SCDMA (Division-Synchronization Code Division Multiple Access) dual-mode terminal. In the PLMN network selecting method provided by the invention, the problems that in the GSM or TD-SCDMA system, one cell only has one PLMN identification and one cell of the LTE can affiliate to different PLMN networks possibly are effectively solved, the characteristics of the existing GSM-TD-SCDMA system are fully utilized, the terminal design is simplified and the hardware cost is reduced.

Description

field of invention [0001] The present invention mainly relates to the realization technology of the terminal in the mobile communication, especially the network selection technology of the public land mobile network (abbreviated as PLMN) of the multimode terminal, and focuses on how to solve the problems in the current second generation global mobile communication system (abbreviated as GSM) and the first Based on the dual-mode terminal of the third-generation mobile communication system (abbreviated as TD-SCDMA), the terminal PLMN network selection problem of the third-generation partnership project (abbreviated as 3GPP) long-term evolution (abbreviated as LTE) access technology is added. technical background [0002] With the increase of people's demand for mobile communication, mobile communication technology has achieved unprecedented development, from the first generation of analog mobile communication, the second generation of digital mobile communication, to the curren...

Claims

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Application Information

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IPC IPC(8): H04W48/18H04W88/06
Inventor 段红光申敏郑建宏
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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