Researches

Queuing theory has been proved as an essential and important tool for performance evaluation of telecommunication networks. In this way, Erlang-B formula has been used frequently for capacity planning of circuit switched networks. Consequently studies of capacity planning in mobile cellular networks are also based on such a formula. In this study we show that the voice traffic model in existing cellular networks does not follow negative exponential assumptions and therefore the Erlang-B formula is no longer valid.

As various wireless networks develop into the next generation to provide better services for users, a key technology, wireless mesh networks (WMNs), has emerged recently. An infrastructure wireless mesh network (InfWMN) is a hierarchical network, consists of mesh clients, mesh routers and gateways. The mesh routers form a wireless mesh infrastructure, to which the mesh clients are connected using star topology. To further improve the flexibility of mesh networking, a mesh router is usually equipped with multiple wireless interfaces.