Registration traffic and service availability for two-tier wireless networks

In order to provide better services to wireless mobile users with different QoS requirements, the multitier system such as the interconnection network of a satellite communications network and a terrestrial cellular network can be developed, where flexible resource allocation schemes can be designed. In such a system, location management is critical; some registration schemes have previously been proposed and analyzed under specific assumptions. In this paper, we carry out a performance evaluation of such schemes under more realistic assumptions, and easy-to-use analytical results are obtained