A throughput deadlock-free TCP for high-speed Internet

Throughput deadlocks were observed when TCP was operated on high-speed networks. This deadlock problem is caused by the interaction of the sender-side and receiverside silly window syndrome avoidance algorithms, because a TCP connection’s Maximum Segment Size is no longer small on high-speed Internet when compared with the send and receive socket buffer sizes. In this paper we propose a new Congestion-Sensitive, Adaptive Acknowledgment Algorithm (CS-AAA) to solve the deadlock problem. Unlike our previously proposed AAA, the CS-AAA is able to respond to and to recover from congestion much faster than AAA. The CS-AAA solves this problem by detecting congestion, and perJorming a slow-start-like mechanism. Extensive simulation results support that CS-AAA ‘s throughput pet$ormance significantly exceeds that of AAA, especially when the send buffer size is relatively large.