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DFS Due to large cw, DFS can potentially yield lower throughput than IEEE 802.11 trade-off between fairness and throughput On multi-hop network, properties of DFS still need to be characterized Fairness in multi-hop case affected by hidden terminals May need use of a copying technique, analogous to window copying in MACAW, to share some protocol state 290
Fairness in Multi-Hop Networks Not clear how to define fairness [Ozugur98,Vaidya99MSR,Luo00Mobicom, Nandagopal00Mobicom] Shared nature of wireless channel creates difficulty in determining a suitable definition of fairness in a multihop network Hidden terminals make it difficult to achieve a desired notion of fairness 291
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- Page 273 and 274: B1 = 25 B2 = 20 cw = 31 DCF Example
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Fairness in Multi-Hop <strong>Networks</strong><br />
Not clear how to define fairness<br />
[Ozugur98,Vaidya99MSR,Luo00Mobicom,<br />
Nandagopal00Mobicom]<br />
Shared nature of wireless channel creates difficulty in<br />
determining a suitable definition of fairness in a multihop<br />
network<br />
Hidden terminals make it difficult to achieve a desired<br />
notion of fairness<br />
291
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