The Research On The Key Problem And Solution Of The Location Service System Based On WCDMA

The third mobile communication highly develops, has become the most important landmark of the wireless communication's progress. The main standard in 3G--WCDMA has inosculated many services such as voice, multimedia etc, has provided an ideal platform for the mobile increment services, and has provided a high wireless network support. The Location Services is an increment service that to obtain the location information of the mobile terminal users by mobile networks, and confirm the real geography location information, then provide corresponded service. Base on the WCDMA network, we can use highly precision wireless location technology to develop many wonderful location services. So we can increase the increment services in 3G, provide a new operation increasing point. The Location Services has the most bright future in the 3G mobile data services, and people have more hope to it, it has become a bright point which has been draw attention in many mobile increment services. In the face of the nearly time of 3G, now many research organizations have carried out researches on this technology, so this thesis has been brought forward in this background.This thesis mainly research some key problems deeply in the location service system based on WCDMA, and bring forward solution to these key problems, and on these bases all-around bring forward an end to end total location services system design thinking solution.At first this thesis has put a research on the network structure problem of location service system, has successfully designed the network structure of location services system, bring forward design thinking solution of the network structure of location services system based on WCDMA; Then put a research on the wireless location technology of WCDMA(CELL ID, OTDOA-IPDL, A-GPS), have a research and definition to some detail technology problems such as the parameter transmitted between the network units, and the location flow, provide some detail solutions, and put a research and optimization on the location arithmetic. In the end this thesis has put a deeply research on the problem of important interfaces and network location flow, have finished the design of important interfaces and network location flow, bring forward design thinking solution to the important interfaces protocol and the location flow of location mode. Finally bring forward an end to end total location services system design thinking solution based on WCDMA, resolve the problems of traditional GPS location technology and the location technology of 2G network.Finally, this thesis has validated the research fruit through examinations, has validated the correctness and feasibility of this solution, has made a sufficient theory research and practice for the development of the 3G location services in the future, and make a good base.