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Eulerian co-ordinated channel access for direct link in IEEE 802.11e WLANs

Eulerian co-ordinated channel access for direct link in IEEE 802.11e WLANs

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IEEE 802.11e optionally adopts the direct link setup to achieve efficient transmission. With a direct link, bandwidth utilisation can be significantly increased by an appropriate transmission order. Presented is an algorithm, called Eulerian transmission order (ETO), that constructs an optimal transmission order for direct links. It is proved that it requires minimal transmission cost. Also presented is the corresponding medium access control scheme called Eulerian co-ordinated channel access. Through simulations, transmission costs for ETO, random order, greedy order and without direct link are compared.

References

    1. 1)
      • Part 11: Wireless LAN Medium Access Control (MAC) and Physical layer (PHY) specifications: Medium Access Control (MAC) quality of service enhancements, IEEE Std 802.11e, 2005
    2. 2)
      • Choi, N., Seok, Y., Choi, Y., Kwon, T.: `Half Direct-Link Setup (H-DLS) for fairness between external and local TCP connections in IEEE 802.11e wireless LANs', Proc. IEEE ICC, 2007, Glasgow, Scotland, p. 4500–4505
    3. 3)
      • ‘QoS baseline proposal - revision 2’, IEEE doc.} 802.11-00/360r2, 2000
    4. 4)
      • Introduction to graph theory
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