Abstract
The TCP networks have been the only communication for wired media that followed IEEE 802.3 networks. This paper attempts to provide a comprehensive overview of this Link Layer approach i.e. Snoop protocol that improving throughput of TCP in wireless networks. It first explains the role of Snoop protocol that overcomes the limitations of TCP protocols in wireless media. We investigated the application of this protocol in wireless networks and observed that a single hop in the wireless network experienced large variations in round trip time in a very short period. Without changes to the Snoop protocol to accommodate these dramatic RTT variations, Snoop was performing badly compared with regular TCP even when there were no packet losses or errors. The main cause for this is premature retransmissions performed by Snoop. We have modified the Snoop protocol to avoid these unnecessary retransmissions by having a higher local retransmission timeout. The results showed us that Snoop benefits from this approach which has made a significant performance improvement over regular TCP in multihop wired cum wireless networks.
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