Performance of TCP over wireless links with hybrid ARQ

摘要

This paper studies TCP performance over a wireless link where hybrid Automatic Repeat reQuest (ARQ) schemes are adopted for combating packet loss due to wireless channel errors. A Markov chain is developed to analytically evaluate the TCP throughput over an arbitrary hybrid ARQ scheme. Base on this model, we can learn how the underlying coding scheme, the link layer retransmission method and the TCP packet buffer size at the access point affect the TCP performance. We demonstrate by analysis and verify by simulation that the CT-TCM hybrid ARQ scheme provides more efficient spectrum utilization and higher TCP throughput than other existing hybrid ARQs.