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In this paper, we propose a method that wireless mobile nodes can obtain high throughput in heterogeneous wireless networks using multiple connections and it has low packet loses under handover situation. Currently, a mobile node exchanges data with server for one network connection. The proposed method can use high throughput because it doesn't only use one network(WLAN, 3G, etc.) but also use multiple wireless networks.When mobile nodes move to area to use multiple connection, mobile nodes request heterogeneous wireless networks using multiple connections message from the server and the server transmit packets using multiple connections. Also, this method doesn't disconnect previous networks, so packets losses are decreased. Using the NS-2 simulation, we verify that the propose method enhances throughput.

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In this paper, we propose a FDL(Freeze DeadLine) algorithm to solve handover problems in heterogeneous wireless networks. Many previous studies concentrated on low level layer to solve handover. In this paper, however, we concentrate on high level handover problems such as network layer and transport layer. We analyze handover problems of transport layer in Heterogeneous wireless network, propose the FLD algorithm for better performance than others studies. The proposed method is analyzed by theoretical frames and we verify the propose method using the NS-2(Network Simulation-2).

No abstract