User-aware rate adaptive control for IEEE 802.11-based ad hoc networks

The existing rate adaptive control schemes for ad hoc networks just adapt to the time variation of the fading channels but not to the variation of the network congestion level. In this paper, we propose a user-aware rate adaptive control (UARAC) scheme for IEEE 802.11-based ad hoc networks, which exploits not only time diversity but also multi-user diversity. The UARAC is RTS/CTS based, where a receiver measures the SNR of a RTS frame, and then selectively returns the CTS frame with a piggyback information showing the maximum feasible rate. The key feature of the UARAC lies in that the probability that the receiver returns the CTS frame depends on the SNR of the RTS frame and the number of active stations in the network, so that the throughput can be further improved by multi-user diversity besides time-diversity. Furthermore, to optimize the throughput on-line, the UARAC tunes the probability that the receiver returns the CTS frame in heuristic mode. Extensive numerical results and simulation results show that the proposed scheme significantly outperforms the existing adaptive schemes

[1]  Dimitri P. Bertsekas,et al.  Data Networks , 1986 .

[2]  Paramvir Bahl,et al.  A rate-adaptive MAC protocol for multi-Hop wireless networks , 2001, MobiCom '01.

[3]  Randall Berry,et al.  Exploiting multiuser diversity for medium access control in wireless networks , 2003, IEEE INFOCOM 2003. Twenty-second Annual Joint Conference of the IEEE Computer and Communications Societies (IEEE Cat. No.03CH37428).

[4]  Ya-Wen Lin,et al.  Cross-layer goodput analysis for rate adaptive IEEE 802.11a WLAN in the generalized Nakagami fading channel , 2004, 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577).

[5]  Edward W. Knightly,et al.  Opportunistic media access for multirate ad hoc networks , 2002, MobiCom '02.

[6]  Marco Conti,et al.  IEEE 802.11 protocol: design and performance evaluation of an adaptive backoff mechanism , 2000, IEEE Journal on Selected Areas in Communications.

[7]  Ronald L. Rivest,et al.  Network control by Bayesian broadcast , 1987, IEEE Trans. Inf. Theory.

[8]  Raymond Knopp,et al.  Information capacity and power control in single-cell multiuser communications , 1995, Proceedings IEEE International Conference on Communications ICC '95.

[9]  Kevin R. Fall,et al.  Ns: notes and documentation , 1997 .

[10]  Biplab Sikdar,et al.  On the impact of IEEE 802.11 MAC on traffic characteristics , 2003, IEEE J. Sel. Areas Commun..

[11]  Leo Monteban,et al.  WaveLAN®-II: A high-performance wireless LAN for the unlicensed band , 1997, Bell Labs Technical Journal.

[12]  Hongqiang Zhai,et al.  Opportunistic media access control and rate adaptation for wireless ad hoc networks , 2004, 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577).