Location Management in Wireless Mobile Systems
by Weiping He
 

Location Management is an essential process in mobile communication networks. There are some important issues including how to reduce location information query cost, how to increase the service capacity of location databases, and so on. In this paper, I proposed a new location management scheme that is based on the centralized database architecture with HLR/VLR. My basic idea is to reduce the cost of call delivery using the location information cached at MSC/VLR, to increase reliability and performance of location server using replica, to increase load balance using hashing to choose one server. There is no difference between primary server and replica in my scheme. When the system receives a call, its MSC cache is checked first to locate the callee, if not find, then search the location server given by a hashing function. Location updates are multicast by a server to other servers. Then I give some mathematical analysis. My proposed scheme is particularly suitable for the evolution of the existing wireless network architecture.