Westwood/Westwood+ TCP is well known by its effective AIAD (Additive Increase and Adaptive Decrease) bandwidth estimation algorithm. This paper proposes an enhanced Westwood+ scheme for wireless/heterogeneous networks with a high random bit error rate (BER), in which the sender is introduced with the following three characteristics: to consider the impact of corruption strength in bandwidth estimation; to reset new slow start threshold (ssthresh) and congestion window (cwnd) after receiving every special ACK with random bit error event's information; to effectively avoid the unwanted timeouts which can be induced in conventional TCP in the case that the retransmitted packets are corrupted in wireless channel.
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