Abstract:

With a rapid growth of UDPbased applications in wireless networks,how to improve the performance of UDP in wireless networks is becoming an important research topic.A novel protocol,named UDP/NLT,is proposed.This protocol uses LT code and network coding technique to encode and decode the packets in order to decrease the negative influence due to the frequent network packet loss, thus increasing the throughput.UDP/NLT does not change the existing protocol stack structure and semantics of UDP and hence come true easily.Analysis and simulations in NS2 show that the UDP/NLT has better throughput performance than traditional UDP,almost without increasing the network latency in wireless networks.

Key words: UDP/NLT;UDP wireless network;network coding;LT codes