A Mobility Management Strategy with Ring Search in Cellular Networks

Location management,which consists of location update and location query,is a challenging topic in mobile communication.The basic location management scheme of personal communications services (PCS's) networks requires that location update be initiated whenever a mobile crosses the boundary of location areas.Obviously,this scheme is likely to waste the system resources due to the locality of mobiles' roaming.Therefore,reducing the cost of location management has become a hotspot of mobile communication.A location management schema with ring search (Ring Schema for short) was conceived,where no location update is needed.Additionally,a formula of the layer number of the location areas queried by Ring Schema was derived.According to this formula,the cost of Ring Scheme,on certain conditions,is less than both the cost of the basic scheme and that of the basic pointer forwarding schema.