Location Updating Schemes for High-Speed Railway Cellular Communication Systems

摘要

High-speed railway private cellular network provides voice and data services for passengers. It brings much signaling cost as a great many of mobile subscribers ask for location updating simultaneously. Moreover, it leads to plenty of control signaling channel requests. This paper presents two novel location updating schemes, that is, "clustering location management" and "mobile group location management" to solve the problems caused by the existing location updating scheme in high speed railway cellular private network. These two schemes can realize location updating without occupying more frequency resources. In addition, it does not impact the mobile subscribers' paging. Then it analyses the performance of two improved schemes, such as channel request number of stand-alone dedicated control channel (SDCCH), average waiting time of location updating, cost of location updating, and paging. The result indicates that both schemes can utilize the SDCCH channel resource effectively.