Opportunistic Routing for Bandwidth-Sensitive Traffic in Wireless Networks with Lossy Links

作者：Zhao, Peng; Yang, Xinyu^*

来源：Journal of Communications and Networks, 2016, 18(5): 806-817.

DOI：10.1109/JCN.2016.000109

• Bandwidth guarantee
• bandwidth-sensitive traffic
• opportunistic routing (OR)
• transmission cost
• wireless multihop networks

Opportunistic routing (OR) has been proposed as a viable approach to improve the performance of wireless multihop networks with lossy links. However, the exponential growth of the bandwidth-sensitive mobile traffic (e.g., mobile video streaming and online gaming) poses a great challenge to the performance of OR in term of bandwidth guarantee. To solve this problem, a novel mechanism is proposed to opportunistically forwarding data packets and provide bandwidth guarantee for the bandwidth-sensitive traffic. The proposal exploits the broadcast characteristic of wireless transmission and reduces the negative effect of wireless lossy links. First, the expected available bandwidth (EAB) and the expected transmission cost (ETC) under OR are estimated based on the local available bandwidth, link delivery probability, for-warding candidates, and prioritization policy. Then, the policies for determining and prioritizing the forwarding candidates is devised by considering the bandwidth and transmission cost. Finally, bandwidth-aware routing algorithm is proposed to opportunistically delivery data packets; meanwhile, admission control is applied to admit or reject traffic flows for bandwidth guarantee. Extensive simulation results show that our proposal consistently out-performs other existing opportunistic routing schemes in providing performance guarantee.

• 出版日期2016-10
• 单位西安交通大学