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Position search method of mobile communication device

A technology for trunking communication and synchronizing information, which is used in telephone communication, wireless communication, emergency/dangerous communication services, etc.

Inactive Publication Date: 2009-03-04
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen that, in the prior art, there is no method that can still realize cluster communication in the case of being separated from the network

Method used

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  • Position search method of mobile communication device
  • Position search method of mobile communication device
  • Position search method of mobile communication device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0060] In this embodiment, the type of the trunking communication system to which the calling terminal and the called terminal belong is the GT800 system, and both the calling terminal and the called terminal are single-mode terminals. The synchronization information in this embodiment includes frequency correction information and frame number information, and according to the requirements of the GSM protocol, the frequency correction information is carried by the FCCH channel, and the frame number information is carried by the SCH channel. In addition, in this embodiment, the system notification message is carried by the BCCH channel according to the requirements of the GSM protocol. figure 2 A schematic diagram of message flow between the calling terminal and the called terminal in this embodiment is shown. Such as figure 2 As shown, the method for implementing cluster communication in this embodiment includes the following steps:

[0061] Step 201: The call module of th...

Embodiment 2

[0077] In this embodiment, the type of the trunking communication system to which the calling terminal and the called terminal belong is still the GT800 system, the calling terminal is a dual-mode terminal, and the called terminal can be a single-mode terminal or a dual-mode terminal. When the called terminal is a single-mode terminal, the communication module of the called terminal receives and processes synchronization information, system messages and user voice information; when the called terminal is a dual-mode terminal, it can still be processed by the communication module of the called terminal The synchronous information, system message and user voice information can also be processed by the synchronization module of the called terminal, and the user voice information can be processed by the call module of the called terminal.

[0078] In this embodiment, the synchronization module and the call module are basically similar, and are all modules including a protocol stack...

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Abstract

The method comprises: the calling terminal sends synchronous information and system information to the called terminal; when calling terminal and called terminal are off-line, the calling terminal sends the synchronous information to the called terminal; according to the synchronous information, the called terminal implements the synchronization with the calling terminal; the calling terminal sends the system message to the called terminal; according to the system information, the called terminal gets the information about service channel of trunking communication system, and monitors the service channel of trunking communication; then, the called terminal sends the user's voice information to the called terminal through the service channel of trunking communication system to implement trunking communication.

Description

technical field [0001] The invention relates to cluster communication technology, in particular to a method for realizing cluster communication. Background technique [0002] Digital trunking communication network is a new type of mobile communication system, which can realize communication between a certain terminal and all other terminals, such as: Global System for Mobile Communications (GSM), Code Division Multiple Access (CDMA) network, etc. There are many digital trunking systems based on digital trunking communication network, such as integrated digital enhanced network (IDEN), terrestrial trunking radio (TETRA), 800M frequency band trunking communication (GT800) using time division multiple access (TDMA) standard, and CDMA standard Global Open Cluster Architecture (GOTA), etc. [0003] In the prior art, no matter what kind of cluster communication system, it must be supported by a corresponding network to realize cluster communication. The basic idea of ​​realizing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/28H04W4/90G01C21/34H04M11/04H04W4/06H04W56/00
CPCH04W56/002H04W48/08H04W72/005H04W76/02H04W56/0035H04W92/18H04W76/10H04W72/30
Inventor 杨长东
Owner HUAWEI TECH CO LTD
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