Abstract
AbstractWireless network has high BERs because of its path losses, fading, noises and interferences. Particularly, in the TCP and MIP environments, the network is often disconnected because of the handover. To solve such problem, the Freeze-TCP mechanism is proposed, but during the handover in the Network layer, the mobile node can’t receive packets. In addition, it cannot handle traffic with high BERs. SNOOP hides packet losses for Fixed Host(FH) and retransmit lost packets in wireless network. However, SNOOP has a weakness for bust errors in wireless network. This paper proposes the MF-SNOOP that loads Enhanced SNOOP modules on the MAP and maintains TCP connectivity during network layer handovers. The Enhanced SNOOP module performs multiple local retransmission for bust errors. By buffering in MAP, MF-SNOOP uses Zero Window Advertisement(ZWA) Messages of Freeze-TCP. Thereafter, MN finishes the handover immediately, and receives its packets.KeywordsWireless-TCPFreeze-TCPSNOOPMF-SNOOP
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