Performance analysis of snoop protocol in 2.3 GHz wireless correlated fading links

In this paper, we have analyzed the TCP performance in the 2.3 GHz portable Internet frequency band with and without the snoop protocol. For a given value of the packet error rate, the TCP performance without the snoop protocol is degraded as the fading gets faster (i.e. the user moves fast). When the snoop protocol is introduced in the base station, the TCP performance is enhanced in all wireless environments. Especially the performance enhancement derived from using the snoop protocol is large in a fast fading channel with high values of packet error rate. This is because packet errors become random and sporadic in a fast fading channel and these random packet errors (mostly single packet errors) can be compensated efficiently by the snoop protocol's local packet retransmissions. But the snoop protocol can not give a large performance enhancement in slow fading environments where long bursts of packet errors occur.