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Short message sending method in vehicular terminal

A vehicle-mounted terminal and short message technology, which is applied in vehicles, wireless communications, messages/mailboxes/notifications, etc., can solve the problems that alarm signals and location information cannot be transmitted in time, the real-time performance is weak, and alarm information cannot be responded in time

Inactive Publication Date: 2004-12-08
ALCATEL LUCENT SHANGHAI BELL CO LTD
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

When the vehicle-mounted terminal alarms, the alarm signal and location information are sent through these two channels. The real-time performance is weak, and the alarm information may not be responded in time. Moreover, when there are a large number of short message sending requests, the channel will be temporarily blocked. , so that the alarm signal and location information cannot be transmitted in time

Method used

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  • Short message sending method in vehicular terminal
  • Short message sending method in vehicular terminal
  • Short message sending method in vehicular terminal

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Embodiment Construction

[0010] As shown in Figure 1, the present invention, namely: a kind of method for vehicle-mounted terminal to send short message, after vehicle-mounted terminal receives the request of sending short message, judges whether the short message channel is blocked: when the short message channel is blocked, switch to DTMF mode, The vehicle-mounted terminal further judges whether monitoring is required: if so, then adopt the dual-tone multi-frequency signal and voice signal interval mode to send short messages; if not, then adopt the mode of continuously sending dual-tone multi-frequency signals to send short messages to the monitoring center; When the short message channel is not blocked, the short message is sent through the short message channel. The short message includes alarm signal and location information.

[0011] In the above process, the principle and process of vehicle-mounted terminals sending short messages using DTMF are as follows: After establishing a voice channel, ...

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Abstract

The short message sending process in vehicular terminal includes the following steps: the vehicular terminal to judge whether to exist blocking in the short message channel after receiving the sending request; the vehicular terminal to judge whether to need monitoring in case of blocking; if so, to send short message in alternate dual-tone multifrequency signal mode and phonetic signal mode; if not, to send short message in continuous dual-tone multifrequency signal; to send short message via the short message channel in case of no blocking; and to end sending. The present invention transmits DTMF signal via FACCH / F or FACCH / H with fast speed and can send the alarm signal and position information to the monitoring center timely. In addition, the DTMF signal has high decoding sensitivity, high decoding speed, strong anti-jamming capacity and high message sending reliability.

Description

(1) Technical field [0001] The invention relates to a method for sending short messages by a vehicle-mounted terminal. (2) Background technology [0002] At present, more and more vehicles are equipped with on-board communication equipment. These equipment usually use GPS / GSM system (Global Positioning System / Global Mobile Communication System), and directly use GSM short message service to send vehicle alarm signals and positions through the GSM network. information. In the GSM network, the short message is generally transmitted through the low-speed associated control channel SACCH (when the traffic channel is allocated) or the independent dedicated control channel SDCCH (when the traffic channel is not allocated). The channel rate of SACCH and SDCCH is very low, and certain signaling information must be transmitted. When the vehicle-mounted terminal alarms, the alarm signal and location information are sent through these two channels. The real-time performance is weak, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/14B60P3/363G10L15/28H04W28/02
Inventor 刘泽叶芸韩俊波毛中山
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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