Proactive Location Service in Mobility Management

This paper proposes a new proactive mobility management mechanism. Instead of traditional mobility management system that when a user wants to connect another it needs to lookup the current location of the called user from the remote home location register (HLR) of the called user, the proposed method provides a special proactive location service to the close friends, who satisfy certain characteristics, of a user. The proactive location service pushes the location information of a user to the current locations of its close friends and is cached there. By doing so, the location lookup of its close friends in calling process is localized resulting in lower lookup delay and signaling cost. The distinct relations between different user pairs are explored, which can be used to identify the close friend group from other friends of a user. The close relation is defined as a function of parameters of calling and mobility characteristics. These parameters are estimated adaptively which are used to update the close relation friends. System performance evaluation and analysis demonstrate that the proposed proactive mobility management mechanism can reduce location lookup delay and signaling cost significantly compared with the traditional mobility management scheme.