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SmartCAC: Call Admission Control scheme to guarantee QoS for Voice over IEEE 802.11 WLANs

by Prasanna Shete, R. N. Awale
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 42 - Number 6
Year of Publication: 2012
Authors: Prasanna Shete, R. N. Awale
10.5120/5694-7325

Prasanna Shete, R. N. Awale . SmartCAC: Call Admission Control scheme to guarantee QoS for Voice over IEEE 802.11 WLANs. International Journal of Computer Applications. 42, 6 ( March 2012), 1-5. DOI=10.5120/5694-7325

@article{ 10.5120/5694-7325,
author = { Prasanna Shete, R. N. Awale },
title = { SmartCAC: Call Admission Control scheme to guarantee QoS for Voice over IEEE 802.11 WLANs },
journal = { International Journal of Computer Applications },
issue_date = { March 2012 },
volume = { 42 },
number = { 6 },
month = { March },
year = { 2012 },
issn = { 0975-8887 },
pages = { 1-5 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume42/number6/5694-7325/ },
doi = { 10.5120/5694-7325 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T20:30:57.052117+05:30
%A Prasanna Shete
%A R. N. Awale
%T SmartCAC: Call Admission Control scheme to guarantee QoS for Voice over IEEE 802.11 WLANs
%J International Journal of Computer Applications
%@ 0975-8887
%V 42
%N 6
%P 1-5
%D 2012
%I Foundation of Computer Science (FCS), NY, USA
Abstract

Most of the wireless LANs deployed today are IEEE 802. 11b/g compliant. Since IEEE 802. 11 standard specifies a contention based MAC- DCF, it cannot support QoS requirements of real-time traffic like voice or video. Thus these WLANs are not suitable for supporting real-time voice traffic. In this paper we propose an admission control scheme "SmartCAC", which without modifying the basic access mechanism of IEEE 802. 11 tries to guarantee QoS for voice traffic. SmartCAC is a channel BW allocation scheme; in which most of the available BW is reserved for real-time voice traffic and remaining small amount is allocated to non real-time data traffic. Moreover, the BW allocation is not static; rather it can be dynamically changed depending on traffic conditions. If the voice traffic is lightly loaded then rather than wasting the greater BW share allocated to voice, it is made available for non real-time traffic sources momentarily. Our ns-2 simulations result show that the proposed SmartCAC scheme can support strict QoS requirements such as high throughput and low delay (<150ms) required for voice over IP.

References
  1. IEEE standard for Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications, ISO/IEC 8802-11: 1999(E) (1999).
  2. IEEE standard for Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Medium Access Control (MAC) Enhancements for Quality of Service (QoS), IEEE 802. 11e/ D13. 0, July (2005).
  3. ITU-T G. 114, "One-Way Transmission Time," 1996.
  4. H. Zhai, X. Chen, Y. Fang, How Well Can the IEEE 802. 11 Wireless LAN Support Quality of Service?, IEEE Trans. Wireless Commun. , vol. 4, no. 6, Nov. 2005, pp. 3084-3094.
  5. H. Zhai, Y. Kwon, and Y. Fang, Performance Analysis of IEEE 802. 11 MAC Protocols in Wireless LANs, Wireless Commun. And Mobile Comp. , vol. 4, Dec. 2004, pp. 917-31
  6. D. Gao, J. Cai, and K. N. Ngan, Admission Control in IEEE 802. 11e Wireless LANs, IEEE Network. , Special Issue on Wireless Local Area Networking: QoS Provision and Resource Management, vol. 19, no. 4, July/Aug. 2005,pp. 6-13.
  7. W. Pattara-Atikom, P. Krishnamurthy, and S. Banerjee, Distributed Mechanisms for Quality of Service in Wireless LANs, IEEE Wireless Commun. , vol. 10, no. 4, June 2003, pp. 26-34.
  8. J. Yu, S. Choi, and J. Lee, Enhancements of VoIP over IEEE 802. 11 WLAN via Dual Queue Strategy, Proc. IEEE ICC '04, Paris, France, June 2004.
  9. The network simulator ns-2. http://www. isi. edu/nsnam/ns
  10. Trace graph. http://www. tracegraph
  11. IEEE standard for Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications, ISO/IEC 8802-11: 1999(E) (1999).
  12. IEEE standard for Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications: Medium Access Control (MAC) Enhancements for Quality of Service (QoS), IEEE 802. 11e/ D13. 0, July (2005).
  13. ITU-T G. 114, "One-Way Transmission Time," 1996.
  14. H. Zhai, X. Chen, Y. Fang, How Well Can the IEEE 802. 11 Wireless LAN Support Quality of Service?, IEEE Trans. Wireless Commun. , vol. 4, no. 6, Nov. 2005, pp. 3084-3094.
  15. H. Zhai, Y. Kwon, and Y. Fang, Performance Analysis of IEEE 802. 11 MAC Protocols in Wireless LANs, Wireless Commun. And Mobile Comp. , vol. 4, Dec. 2004, pp. 917-31
  16. D. Gao, J. Cai, and K. N. Ngan, Admission Control in IEEE 802. 11e Wireless LANs, IEEE Network. , Special Issue on Wireless Local Area Networking: QoS Provision and Resource Management, vol. 19, no. 4, July/Aug. 2005,pp. 6-13.
  17. W. Pattara-Atikom, P. Krishnamurthy, and S. Banerjee, Distributed Mechanisms for Quality of Service in Wireless LANs, IEEE Wireless Commun. , vol. 10, no. 4, June 2003, pp. 26-34.
  18. J. Yu, S. Choi, and J. Lee, Enhancements of VoIP over IEEE 802. 11 WLAN via Dual Queue Strategy, Proc. IEEE ICC '04, Paris, France, June 2004.
  19. The network simulator ns-2. http://www. isi. edu/nsnam/ns
  20. Trace graph. http://www. tracegraph
Index Terms

Computer Science
Information Sciences

Keywords

Ieee 802. 11 Wireless Local Area Network (wlans) Quality Of Service (qos) Medium Access Control (mac) Bandwidth (bw)

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