Study And Implementation Of Integrated Communicational Three In One System Based On WLAN

In modern underground mine engineering, the primary concerns of the enterprise managers are how to construct underground audio communication system, video monitoring system, personnel & equipment tracking system and so on. Underground integrated communications technology has gradually developed aiming at tackling these problems, and it will lead to great changes in mining enterprise in China. The construction of underground integrated communications system not only matters for the safety of underground production, but also lays significance in building the information and network systems of the mining enterprise.Underground comprehensive service system is studied based on multidiscipline, in which knowledge concerning not only mining, but also embedded system,computer network and communication technologies are needed.In writing this thesis, the following aspects have been emphatically studied:(1)At first, the characters of transmission and the standards of the protocol of Wireless LAN are presented accord to it's theory;(2)This thesis build the compound part of transmission module of three in one system, and offer the redundant design of the backbone network;(3)This thesis introduces the course of the development of the surveillance system, analyses the theory and structure of it and propose the scheme of how to build the surveillance system;(4)This thesis introduces the theory of VOIP, present the structure of the VOIP phone and the principle of how the phone works and outline the related protocol, offer configuration of the VOIP server.(5)This thesis introduces the hardware main framework of personnel tracking system, design the hardware of core module, present the theory and implementation of software.(6)In the last part of this thesis, DAHONGSHAN Copper Mine has been mentioned to illustrate the problem occurred during the implementation of the 3 in one system such as the layout of the network and distribution of the AP.This thesis proposes an implementation of a wireless three in one system integrated with surveillance system,audio communication system, and personnel tracking system based on the introduction on wireless LAN protocol & LAN protocol. With this approach. the redundancy in constructing of surveillance system,audio communication system,and personnel tracking system can be avoided. The system can also lift the efficiency of the bandwidth and provide multi-service. The system has more superiority than any other traditional underground system and supplies a possible solution for the future digital mines and even unmanned working face underground.