Distributed Flow Control and Medium Access in Multihop Ad Hoc Networks
IEEE Transactions on Mobile Computing
SAM-MAC: An efficient channel assignment scheme for multi-channel ad hoc networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
SAM-MAC: an efficient channel assignment scheme for multi-channel ad hoc networks
The Fourth International Conference on Heterogeneous Networking for Quality, Reliability, Security and Robustness & Workshops
Opportunistic link scheduling for multihop wireless networks
IEEE Transactions on Wireless Communications
An opportunistic multiradio MAC protocol in multirate wireless ad hoc networks
IEEE Transactions on Wireless Communications
Utilizing multi-hop neighbor information in spectrum allocation for wireless networks
IEEE Transactions on Wireless Communications
Multiple receiver transmission strategy for receiver blocking problem in wireless multi-hop networks
RWS'09 Proceedings of the 4th international conference on Radio and wireless symposium
Incorporating traffic dependency information in distributed spectrum allocation
MILCOM'09 Proceedings of the 28th IEEE conference on Military communications
A solution to hidden terminal problem over a single channel in wireless ad hoc networks
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
A joint solution for the hidden and exposed terminal problems in CSMA/CA wireless networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
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IEEE 802.11 MAC protocol has been the standard for wireless LANs and is also implemented in many simulation software for mobile ad hoc networks. However, IEEE 802.11 MAC has been shown to be quite inefficient in the multihop mobile environments. Besides the well-known hidden terminal problem and the exposed terminal problem, there also exists the receiver blocking problem, which may result in link/routing failures and unfairness among multiple flows. Moreover, the contention and interference from the upstream and downstream nodes seriously decrease the packet delivery ratio of mulitihop flows. All these problems could lead to the "explosion" of control packets and poor throughput performance. In this paper, we first analyze these anomaly phenomena in multihop mobile ad hoc networks. Then, we present a novel effective random medium access control (MAC) protocol based on IEEE 802.11 MAC protocol. The new MAC protocol uses an out-of-band busy tone and two communication channels, one for control frames and the other for data frames, and can give a comprehensive solution to all the aforementioned problems. Extended simulations demonstrate that our protocol provides a much more stable link layer, greatly improves the spatial reuse, and works effectively in reducing the packet collisions. It improves the throughput by up to 20% for one-hop flows and by up to 5 times for multihop flows under heavy traffic comparing to the IEEE 802.11 MAC