Hub-polling-based IEEE 802.11 PCF with integrated QoS differentiation

IEEE 802.11 is one of the most influential wireless LAN (WLAN) standards. Point coordination function (PCF) is its medium access control (MAC) protocol with real-time traffic (rt-traffic) quality-of-service (QoS) guarantees. In PCF, it is very likely that non-real-time traffic (nrt-traffic) will use the contention free period (CFP) that should be dedicated to traffic having higher priority such as rt-traffic. Therefore, a modified PCF protocol called MPCF, which is based on hub polling and an integrated QoS differentiation, is presented in this paper. With the integrated QoS differentiation, MPCF can prioritize bandwidth requests according to service classes and QoS requirements. With hub polling, MPCF can reduce the bandwidth for control frames and improve the network throughput. A simple and accurate analytical model is derived and presented in this paper to calculate the system throughput of MPCF. Simulation results show that MPCF protocol is much better than PCF in terms of system capacity and rt-traffic QoS guarantees. Copyright © 2008 John Wiley & Sons, Ltd.

[1]  Michael G. Barry,et al.  Supporting service differentiation in wireless packet networks using distributed control , 2001, IEEE J. Sel. Areas Commun..

[2]  Anan Phonphoem,et al.  Robust SuperPoll with Chaining Protocol for IEEE 802.11 Wireless LANs in Support of Multimedia Applications , 2001, Wirel. Networks.

[3]  Yang Xiao.  A simple and effective priority scheme for IEEE 802.11 , 2003, IEEE Commun. Lett..

[4]  Kwang-Cheng Chen,et al.  Interference analysis of nonpersistent CSMA with hidden terminals in multicell wireless data networks , 1995, Proceedings of 6th International Symposium on Personal, Indoor and Mobile Radio Communications.

[5]  Ruay-Shiung Chang,et al.  A Priority Scheme for IEEE 802. 11 DCF Access Method , 1999 .

[6]  Shiann-Tsong Sheu,et al.  A bandwidth allocation/sharing/extension protocol for multimedia over IEEE 802.11 ad hoc wireless LANs , 2001, IEEE J. Sel. Areas Commun..

[7]  Srikanth V. Krishnamurthy,et al.  Polling-based media access protocols for use with smart adaptive array antennas , 2001, TNET.

[8]  Claude Castelluccia,et al.  Differentiation mechanisms for IEEE 802.11 , 2001, Proceedings IEEE INFOCOM 2001. Conference on Computer Communications. Twentieth Annual Joint Conference of the IEEE Computer and Communications Society (Cat. No.01CH37213).

[9]  Thierry Turletti,et al.  A survey of QoS enhancements for IEEE 802.11 wireless LAN , 2004, Wirel. Commun. Mob. Comput..

[10]  Thierry Turletti,et al.  Adaptive EDCF: enhanced service differentiation for IEEE 802.11 wireless ad-hoc networks , 2003, 2003 IEEE Wireless Communications and Networking, 2003. WCNC 2003..

[11]  Liqiang Zhao,et al.  Enhancement of QoS differentiation over IEEE 802.11 WLAN , 2004, IEEE Communications Letters.

[12]  Zi-Tsan Chou,et al.  UPCF: a new point coordination function with QoS and power management for multimedia over wireless LANs , 2006, TNET.

[13]  Liqiang Zhao,et al.  M-PCF: modified IEEE 802.11 PCF protocol implementing QoS , 2002 .

[14]  Philip C. Kelly,et al.  Modeling and Analysis of Computer-Communication Networks , 1980 .

[15]  Wen-Kuang Kuo,et al.  Time bounded services and mobility management in IEEE 802.11 wireless LANs , 1997, 1997 IEEE International Conference on Personal Wireless Communications (Cat. No.97TH8338).

[16]  A. S. Krishnakumar,et al.  Real-time traffic over the IEEE 802.11 medium access control layer , 1996, Bell Labs Technical Journal.

[17]  Liqiang Zhao,et al.  Enhancement of QoS Differentiation Over , 2004 .