Digital dispatching communication system

A scheduling communication, digital technology, applied in the direction of data exchange and ring network through path configuration, can solve the problems of paralysis of the scheduling system, high system security cost, increased system cost, etc., to achieve less time slot occupation and save transmission system resources. Effect

Inactive Publication Date: 2004-01-28
BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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Problems solved by technology

The main problems of the above scheme are: ①The system communication occupies many time slots of the data transmission channel, which wastes resources and costs a lot
② High cost of system security
In order to make the system communication safe, time slot backup must be considered, otherwise the disconnection of a digital transmission channel will lead to the paralysis of the entire dispatching system
The number of time slots for backup should be equal to the number of time slots used. In the case of a large number of occupied time slots, it will be difficult to ensure that there is a circuitous path for backup time slots. Even if backup can be guaranteed, a single type of The contribution of the data channel to the communication security of the system is also very limited. If another type of transmission channel, such as microwave or satellite channel, is used, the system cost will inevitably be greatly increased.
③It is not conducive to separate time slot management and transmission management

Method used

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0011] first reference figure 2 . The connection between the dispatching host and each dispatching extension adopts a star structure, and the dispatching host and each dispatching extension occupy different time slots of the digital transmission channel, and occupy more time slots. Assuming that there are 50 stations in the dispatching section of a railway dispatching communication system, and there are 10 dispatching services, each dispatching service needs to constitute a subsystem, and the number of channel time slots to be occupied is 500. If the E1 digital interface is used for communication, Since the bandwidth of each E1 interface is 30 time slots, about 17 E1 interfaces are needed. If time slot backup is considered, the number of occupied time slots will be doubled. The time slot occupation of so many transmission channels makes it difficult...

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Abstract

The present invention discloses a digital dispatching communication system, and is characterized by that in every sub-system of said system the main station and extension connected with said main station are sequentially series-connected by means of respective digital adder, and formed into a loop network by utilizing alternate channel time slot, the main station and extension share one time slot, so the occupied time slot is small, it can greatly save transmission system resource and is favourable for selecting one proper channel from digital transmission channels of microwave communication, satellite communication, optical fibre and copper cable as alternate time slot and only need to increase less cost, at the same time it is favourable for time slot management and transimission management of said system.

Description

technical field [0001] The invention relates to a digital dispatching communication system, in particular to a digital dispatching communication system in which a switchboard and an extension share time slots. Background technique [0002] In the digital communication system dedicated to dispatching, it usually includes several dispatching communication subsystems. These dispatching communication subsystems generally adopt a star network structure. It consists of several extensions connected radially. According to this networking scheme, the call between the dispatching switchboard and each dispatching extension will occupy a time slot of the digital transmission channel. As many dispatching extensions as there are, the number of time slots will be occupied. The conference mode is superimposed. The main problems of the above solution are: ①The system communication occupies many time slots of the data transmission channel, which wastes resources and costs a lot. ② System s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/42
Inventor 周军民
Owner BEIJING JIAXUN FEIHONG ELECTRIC CO LTD
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