Evaluation of a Queue Management Method for TCP Communications over Multi-hop Wireless Links

In this paper we propose a queue management method for improving TCP performance over multihop wireless links. With our proposed control method, packet loss in the wireless link is completely eliminated and all packets are delivered in the correct order. No change is required to TCP itself or to the servers. Our proposed method is implemented between the media access control layer (MAC) and logical link layer in each node, and is designed to help the local retransmission control in the MAC layer. Computer simulation experiments show that our proposed method can communicate in high error wireless link conditions even when conventional methods cannot maintain communication. The fairness problem of TCP communication, between connections with different round trip times, is also improved.