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Adaptive Backoff Congestion Control Protocol for Real-time Traffic in Ad Hoc Networks


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Adaptive Backoff Congestion Control Protocol for Real-time Traffic in Ad Hoc Networks
JIANG Dao-xia12WENG Ye-Lin12LIU Ling2LIU Feng-yu1
1.School of Computer Science and Technology,NUST,Nanjing 210094,China;2.Department of Computer Engineering,Jiangsu Vocational and Technical College of Finance & Economics,Huaian 223003,China
adaptive backoff congestion control quick-exchange fast-forward protocols
This paper improves IEEE 802.11 DCF(Distributed coordination function) and proposes a real-time backoff adaption congestion control(RBA-CC) protocol.The RBA-CC protocol applies Quick-exchange and Fast-forward mechanisms to multi-hop Ad Hoc network.It alleviates MAC layer inter-stream contention and intra-stream contention,and improves the transmission efficiency of real-time traffic.RBA-CC protocol gets congestion information(CI) from queue instantaneous state of node,and then uses ACK frame piggybacking to transfer the CI to the upper node,realizes adaptive backoff congestion control mechanism.The simulation results show that the RBA-CC protocol can decrease the delay of real-time traffic,and can remarkably increase the network end-to-end saturation throughput.


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Last Update: 2012-11-19