期刊
WIRELESS NETWORKS
卷 17, 期 3, 页码 779-796出版社
SPRINGER
DOI: 10.1007/s11276-010-0314-7
关键词
Admission control; Delay; Bandwidth; Multi-channel; Multi-radio; Mesh networks; Link scheduling
资金
- NSF [CNS-0832120, CNS-1035894]
- National 973 Project of China [2011CB302701]
- National Science Fund for Distinguished Young Scholars [60925010]
- National Natural Science Foundation of China [60828003]
- Zhejiang Provincial Key Innovative Research Team
- Zhejiang Provincial Overseas High-Level Talents (One-hundred Talents Program)
- Tsinghua National Laboratory for Information Science and Technology (TNList)
Providing Quality of Service (QoS) is a major challenge in wireless networks. In this paper we propose a distributed call admission control protocol (DCAC) to do both bandwidth and delay guaranteed call admission for multihop wireless mesh backbone networks, by exploiting the multi-channel multi-radio (mc-mr) feature. We propose a novel routing metric for route setup, and present an efficient distributed algorithm for link reservation that satisfies the required bandwidth and reduces the delay by a local scheduling that minimizes one hop delay. To the best of our knowledge, this is the first distributed protocol that embeds mc-mr feature in Time Division Medium Access (TDMA) to do QoS call admission in wireless backbone networks. Extensive simulation studies show that our protocol significantly improves network performance on supporting QoS sessions compared with some widely used protocols.
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