- Title
- On load adaptation for multirate multi-AP multimedia WLAN-based cognitive networks
- Creator
- Ong, Eng Hwee; Khan, Jamil Y.
- Relation
- 2nd IFIP Wireless Days (WD) 2009. 2nd IFIP Wireless Days (WD) 2009: Proceedings (Paris, France 15-17 December, 2009)
- Publisher Link
- http://dx.doi.org/10.1109/WD.2009.5449706
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- conference paper
- Date
- 2009
- Description
- The widespread use of IEEE 802.11 WLAN and the potential to deliver QoS demanding multimedia contents, with the advent of 802.11n standard, will position itself as one of the introductory de-facto wireless access networks in the emerging cognitive networks. Existing WLANs can be augmented with cognitive functionality by the introduction of cognitive radios. However, the frequency-agile cognitive radio supports dynamic spectrum access to channels, which are heterogeneous and have largely different propagation characteristics, from diverse parts of the available frequency spectrum. Although WLAN supports link adaptation in practice, most of the existing WLANs are DCF-based which will give rise to the well-known rate anomaly problem where the long-term throughput of stations are penalized by the lowest data rate peer under multirate operation. Hence, deploying a WLAN-based cognitive network results in nontrivial radio resource management. In this paper, we introduce the novel concept of load adaptation strategy (LAS) to manage dynamic channel conditions associated with multirate multi-AP multimedia WLAN-based cognitive network in a single unifying QoS framework. Particularly, we show that our distributed LAS arbitrates optimal load distribution by maintaining a QoS-balanced system through QoS-based handovers in an opportunistic yet altruistic manner. Through simulations, we show that rate anomaly in multirate environment can be mitigated, statistical QoS guarantee can be provisioned for multimedia traffic with QoS fairness and system capacity can be maximized.
- Subject
- cognitive radio; load distribution; multimedia communication; quality of service; radio access networks; radio spectrum management; wireless LANs; wireless channels
- Identifier
- http://hdl.handle.net/1959.13/918931
- Identifier
- uon:8744
- Identifier
- ISBN:9781424456611
- Rights
- Copyright © 2009 IEEE. Reprinted from the 2nd IFIP Wireless Days (WD) 2009: Proceedings. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of University of Newcastle's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
- Language
- eng
- Full Text
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