Abstract
WLAN MAC layer implements Point Coordination Function (PCF) for real-time traffic. The polling overhead and null packets wasted bandwidth when the polled station has no data to send. To increase the channel utilization and reduce the delay of real-time packets, presents a modified polling scheme. Adaptive polling scheme adopts a dynamic polling list to reduce unnecessary Polls and Null packets, and uses moredata list with extended PCF scheme to utilize the remaining CFP. Unpolled station utilizes real-time uplink protocol to transmit real-time multimedia packets in CP. Simulations show that the proposed scheme reduces the poling overhead and the delay of real-time traffic, and improve the throughput of real-time traffic.
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References
IEEE Std 802.11, Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE (1999)
Veeraraghavan, M., Cocker, N., Moors, T.: Support of voice services in IEEE 802.11 wireless LANs. In: Proceeding of IEEE Computer and Communications Societies, pp. 488–497 (2001)
Coutras, C., Gupta, S., Shroff, N.B.: Scheduling of real-time in IEEE 802.11 LANs. Wireless Networks, 457–466 (June 2000)
Ganz, A., Phonphoem, A., Ganz, Z.: Robust SuperPoll with Chaining Protocol for IEEE802.11 Wireless LANs in Support of Multimedia Applications. Wireless Networks, 65–73 (July 2001)
Zhao, L., Fan, C.: M-PCF Modified IEEE 802.11 PCF Protocol Implementing QoS. Electronic Letters, 1611–1613 (November 2002)
Kanjanavapastit, A., Landfeldt, B.: A modified point coordination function in IEEE 802.11 wireless LAN. In: IEEE ICON 2003, pp. 561–566 (2003)
Kanjanavapastit, A., Landfeldt, B.: An Analysis of a Modified Point Coordination in IEEE 802.11. In: 14th IEEE Proceedings, vol. 2, pp. 1732–1736 (2003)
Hsu, M.-C., Chen, Y.-C.: Enhanced PCF Protocols for Real-time Multimedia Services 802.11 Wireless Networks. In: Proceedings of 26th IEEE International Conference on Distributed Computing Systems Workshops (ICDCSW 2006) (2006)
Kanjanavapastit, A., Landfeldt, B.: A Performance Investigation of the Modified PCF with Priority Scheme. ECTI Transactions on Electrical ENG., Electronics, and Communications 3(1), 2–9 (2005)
Ziouva, E., Antonakopoulos, T.: A dynamically adaptable polling scheme for voice support in IEEE802.11 networks. Computer Communications 26(2), 129–142 (2003)
Kawata, T.: Using Dynamic PCF to Improve the Capacity for VoIP Traffic in IEEE 802.11 Networks. In: Wireless Communications and Networking Conferernce, vol. 3, pp. 1589–1595. IEEE (2005)
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Xiaoying, S., Dong-ben, L., HaiSheng, H. (2012). Research of PCF for Real-Time Multimedia Services in WLAN. In: Zhang, W. (eds) Advanced Technology in Teaching. Advances in Intelligent and Soft Computing, vol 163. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-29458-7_26
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DOI: https://doi.org/10.1007/978-3-642-29458-7_26
Publisher Name: Springer, Berlin, Heidelberg
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