Paced TCP: A Dynamic Bandwidth Probe TCP with Pacing in AD HOC Networks

The performance of TCP degrades greatly in multi- hop ad hoc networks due to the fact that the traditional TCP is unable to adapt the unique properties of the IEEE 802.11 wireless technology. This paper proposes a pure rate-based TCP, Paced TCP to dynamically probe the network's bandwidth which reduces packets dropping from link layer. Paced TCP is able to alleviate the MAC channel contentions and therefore provides better performance. By alleviating packets dropping from link layer, the number of retransmissions at TCP layer can be decrease, and therefore a more efficient communication can be established. With Paced TCP, less retransmissions than TCP Reno is demonstrated in the paper. With NS-2 simulator, we show that by probing networks dynamically with pacing, packets dropped by the MAC channel contentions can be reduced, and Paced TCP is able to provide better fairness and throughput stability between competing flows.