The Application Of Data Services In The Police Digital Trunking System

In China,the wireless communication is the primary means of command and dispatch of public security organs and police digital trunking communication has become the main technical system of new generation wireless communication with the continuous development and deepening of information technology.Under these circumstances,it can enrich the mode of public security command and dispatch,and make commander more efficient and convenient in directing and handling the public security and the disposition of police force more scientific and reasonable that giving full play to the advantages of digital trunking system,deeply mining application potential of research data service,mastering key technologies,displaying above image and sending voice to a single or multiple terminals through the study of police digital walkie talkie positioning information.By adopting the method of combining requirement analysis with technical analysis,this paper studies on the application of data service in police digital trunking system.Taking the application status of wireless command and dispatch system of Tianjin Public Security Bureau as the research background,this paper presents the application needs of police work on satellite positioning,track playback,SMS single shot,SMS group shot,short message inquiry and other functions.On this basis,it designs the application system of PDT data service based on the principles of practicality,security,progressiveness,compatibility and openness.This paper expatiates the realization method of satellite positioning and track playback,and also shows the process of sending and querying short messages at the same time.And the paper also detailedly illustrated the construction method of hardware and software by using the the combining of charts and tables.The author carried on an overall test to the design achievement from two aspects of the system function and the performance after the completion of the system design.According to the test,it reveals that the system function is fully realized,and the security performance and invulnerability performance have high performance.And the system has strong practicability,and provides a reference for the widespread application of data services in the police digital trunking system.