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Automatic offline method under DMR (Digital Mobile Radio) transit mode

An automatic, mode-based technology, applied in the field of DMR communication, can solve problems such as call failure, and achieve the effect of improving the success rate and smooth switching

Inactive Publication Date: 2011-10-12
KIRISUN COMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this case, causing the call to fail

Method used

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  • Automatic offline method under DMR (Digital Mobile Radio) transit mode
  • Automatic offline method under DMR (Digital Mobile Radio) transit mode
  • Automatic offline method under DMR (Digital Mobile Radio) transit mode

Examples

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Embodiment Construction

[0013] This embodiment is a preferred implementation mode of the present invention, and other principles and basic structures that are the same or similar to this embodiment are within the protection scope of the present invention.

[0014] Please see attached figure 1 , in the relay mode of the present invention, communication terminal A (ie DMR terminal) and communication terminal B (ie DMR terminal) use the transmission frequency f 1 , receiving frequency f 2 To communicate with the relay station, communication terminal A first uses f 1 The frequency sends the information to the repeater, which in turn converts it into f 2 The frequency is sent to communication terminal B to complete the communication.

[0015] Please see attached image 3 , when the communication system in the present invention works in the relay mode, when the DMR terminal (in this embodiment, it is a walkie-talkie, or it can be called communication terminal A or communication terminal B) if it transm...

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Abstract

The invention discloses an automatic offline method under a DMR (Digital Mobile Radio) transit mode, comprising the following step: when a communication system is in the transit mode, if a DMR terminal dose not receive an effective frame from a downlink of a repeater after transmitting activated frames to the repeater for set times, the DMR terminal automatically switches transmitting frequency into the transmitting frequency of the repeater to carry out information transmission in a through mode. According to the invention, the success rate of communication can be greatly enhanced under the condition that the downlink can not receive the effective frame of a base station; smooth switching is realized without user intervention; and the automatic offline method is more suitable for application to the aspect of emergency.

Description

[0001] technical field [0002] The invention discloses a DMR communication method, in particular to an automatic off-network method in a DMR transfer mode. Background technique [0003] DMR is the abbreviation of Digital Mobile Radio, which is a protocol standard used by European digital walkie-talkies. According to the DMR protocol, in the relay mode, if the DMR terminal transmits the maximum number of activation frames to the repeater during the channel access process, if the mobile station (that is, the DMR terminal) has not received the repeater's downlink valid frame, the transmission of the DMR terminal will be rejected as an invalid call. In this case, the call fails. Contents of the invention [0004] In view of the above-mentioned shortcoming that the DMR transfer mode in the prior art will cause call failure, the present invention provides a method for automatically disconnecting from the network under the DMR transfer mode. If the DMR terminal transmits a set...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q5/24H04B1/50
Inventor 付文良赵蕊
Owner KIRISUN COMM
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