High Precision Mobile Location Framework and its Service Based on Virtual Reference Station of GPS
The wireless communication technology and space technology are synchronously developed in recent years,which bring up the development of location based service (LBS).At present,many location technology methods were developed.However,all these methods can only provide a relative poor location precision and depend on high cost.The technology of Virtual Reference Station (VRS) of GPS is then involved in this paper.One of the objective in this paper is aim to give the LBS position structure to improve the mobile location position when a mobile position instrument is connected with VRS network.The cheaper GPS built-in Personal Designer Aid (PDA) is then used to achieve a higher precision by using RTCM data from existing VRS network.In order to obtain a high precision position when using the low-cost GPS receiver as a rover,the infrusture of the mobile differential correction system is then put forward.According to network transportation of RTCM via internet protocol (NTRIP),the message is communicated through wireless network,such as GPRS,CDMA and so on.The rough coordinate information is sent to VRS control center continuously,and then the VRS correction information is replied to rover in the data format of RTCM3.1.So the position will be updated based on mathematic solution after the decoding of RTCM3.1 data.The thought of LBS position can improve the precision,and can speed the LBS.
Virtual Reference Station RTCM Decoding Mobile location service
Chun Liu Liangyu Sun Lianbi Yao
Department of Survey and Geo-Informatics,Tongji University,Shanghai,China,200092;Key Laboratory of A Department of Survey and Geo-Informatics,Tongji University,Shanghai,China,200092
国际会议
第16届国际地理信息科学与技术大会(16th International Conference on GeoInformatics and the Joint Conference)
广州
英文
2008-06-28（万方平台首次上网日期，不代表论文的发表时间）