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The wireless medium must be effectively shared in an ad hoc network. The multihop nature of the network demands it, with packets often requiring several transmissions in order to reach their destination. This paper describes a mechanism for improving the IEEE 802.11 MAC specifically for ad hoc networks. The Forward Focus mechanism uses the forwarding nature itself to improve the efficiency and effectiveness of the forwarding process. A simulation-based performance evaluation reveals that the approach can yield significant improvements in network throughput.
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