Abstract
Opportunistic scheduling monitors the receivers’ channel states and schedules packets to the receivers in relatively good channel conditions. Opportunistic scheduling can be easily implemented in cellular networks such as the 1xEVDO system because the channel state report function is embedded in the system. To apply opportunistic scheduling to WLANs, deficient of channel report functions, we first devise efficient channel probing mechanisms. Several opportunistic scheduling methods for WLANs have been proposed recently. These previous methods limit the candidate receivers and may not fully realize the potential multiuser diversity gains. In this paper, we develop new opportunistic scheduling called WDOS (Wireless LAN Distributed Opportunistic Scheduling). That is based on a modified RTS/CTS exchange scheme. In WDOS, a sender broadcasts a BRTS (Broadcast RTS) to all receivers. A receiver responds with a CTS after a backoff delay. The value of the backoff delay is determined such that the receivers in relatively better channel conditions acquire channel accesses. We evaluate the performance of WDOS both via an analytic method and via computer simulations. Our performance study shows that WDOS achieves the performance near optimal.
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Bianchi, G.: Performance analysis of the IEEE 802.11 distributed coordination function. IEEE JSAC in Commun. 18(3), 535–547 (2000)
Holtzman, J.M.: CDMA forward link waterfilling power control. In: Proc. IEEE VTC 2000-Spring, Tokyo, Japan, January 2000, pp. 1663–1667 (2000)
IEEE Computer Society LAN/MAN Standards Committee, Part 11: Wireless LAN Me-dium Access Control (MAC) and Physical Layer (PHY) Specifications. ANSI/IEEE Std 802.11, 1999 edn. (1999)
IEEE Computer Society LAN/MAN Standards Committee, Part 11: Wireless LAN Me-dium Access Control (MAC) and Physical Layer (PHY) specifications. High-speed Physi-cal Layer in the 5 GHz Band, IEEE Std 802.11a-1999(R2003) (Supplement to IEEE Std 802.11-1999)
Jalali, A., Padovani, R., Pankaj, R.: Data Throughput of CDMA-HDR a High Effi-ciency-High Data Rate Personal Communication Wireless System. In: Proc. IEEE VTC 2000-Spring, Tokyo, Japan, January 2000, pp. 1854–1858 (2000)
Ji, Z., Yang, Y., Zhou, J., Takai, M., Bagorodia, R.: Exploiting Medium Access Diversity in Rate Adaptive Wireless LANs. In: Proc. ACM MOBICOM 2004, Philadelphia, Pennsyl-vania, September 2004, pp. 345–359 (2004)
Knopp, R., Humblet, P.: Information capacity and power control in single cell multiuser communications. In: Proc. IEEE ICC 1995, Seattle, WA, June 1995, pp. 331–335 (1995)
Kogiantis, A., Joshi, N., Sunay, M.O.: Effects of Scheduling on Transmit Diversity Performance in 1xEV-DV, Lucent Contribution to 3GPP2 TSG-C Standards Body (December 2000)
NS-2 (2005), http://www.isi.edu/nsnam/ns
Qualcomm, Inc., 1xEV: 1x Evolution IS-856 TIA/EIA Standard Airlink Overview, Revision 7.2 (November 7, 2001)
Rappaport, T.S.: Wireless Communications: principles and practice, 2nd edn. Prentice Hall, Englewood Cliffs
Wang, J., Zhai, H., Fang, Y.: Opportunistic Packet Scheduling and Media Access Control for Wireless LANs and Multi-hop Ad Hoc Networks. In: Proc. IEEE WCNC 2004, Atlanta, Georgia (March 2004)
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Hahm, Si., Lee, J., Kim, Ck. (2006). Distributed Opportunistic Scheduling in IEEE 802.11 WLANs. In: Cuenca, P., Orozco-Barbosa, L. (eds) Personal Wireless Communications. PWC 2006. Lecture Notes in Computer Science, vol 4217. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11872153_23
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DOI: https://doi.org/10.1007/11872153_23
Publisher Name: Springer, Berlin, Heidelberg
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