Design And Achievemen Of Dispatching System For Forestry Digital Trunking System Based On DMR

The International general DMR(Digital Mobile Radio)communication standard is designed and formulated by ETSI,which is applied for European and international professional and commercial users for mobile communications.With the acceleration of the digital process in all fields,the technology has been widely used in the field of professional wireless communications.According to the DMR technology form the IPSC(IP Site Connection)agreement,predecessors developed a digital trunked wireless communication system based on DMR.This communication system achieved the basic function of the digital routine system,and also,it could brings about multi channels shared in one basestation?multi basestations interconnected with IP network,data transmission.These functions are belonged by trunked communication system.Among them,the dispatching system is the core of the whole digital trunking wireless communication system,and plays a very important role.In this thesis,a digital trunked communication system based on DMR communication protocol is designed and implemented according to the specific requirements of forestry industry.The dispatcher is a operated device that used directly,The highest right for industry users are directly reflected in the dispatching subsystem.The first part introduces the research status of communication dispathing system in forestry industry in the country and in abroad,and also introduces the related technologies of digital trunking communication system and dispatching system based on DMR;then,the thesis describes the requirements and overall scheme design of the digital trunked communication dispatching system based on DMR communication protocal.It also introduces the interaction and implementation process between the dispatching system?the switching control center and the digital terminal.It mainly includes system registration module,voice communication module(such as group call,single call,full call)and data communication module(such as GPS location information display,short message,dynamic reorganization).Finally,thesis thesis introduces the test dispatching subsystem,including internal test in the dispatching system,and test the dispatching module in trunking communication system.Finally,the thesis introduces the test result to verifiy feasibility of the technology plan.