Performance Analysis Of Integrated Multihop Heterogeneous Networks

Next-generation network (NGN) will see an integration of various types of wireless networks, which provides mobile users with seamless and pervasive network connectivity. One of the major challenges of the integration is the network selection strategy. In this thesis, we will propose a network selection strategy that employs the concept of multihop ad hoc network (MANET) based on multiple traffic types. Furthermore, we add channel reservation method to the scheme in order to further reduce voice call blocking probability. We also try to reduce the traffic burden of wireless local area network (WLAN) by requesting services from the cellular network before retransmissions in WLAN when the number of packet retransmissions has exceeded the threshold. System performances are evaluated through extensive simulations and the results show that our schemes not only achieve lower new/handoff voice call blocking probability, but also lead to increased average WLAN throughput compared to the single-hop connection scheme.