- Title
- Provisioning delay sensitive services in cognitive radio networks by opportunistically sharing spectrum from CSMA/CA networks
- Creator
- Hasan, Rashidul; Murshed, Manzur
- Date
- 2010
- Type
- Text; Conference paper
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/59299
- Identifier
- vital:6272
- Identifier
- ISBN:9780769542140
- Abstract
- Cognitive radio network (CRN) users are inherently expected to experience widely varied delays and jitters due to the uncertainty in channel availability. Supporting delay sensitive real-time services through CRNs thus remains a challenging task. This paper presents a novel technique to provision QoS guarantee in CRNs by modeling the resultant channel of multiple primary networks and finding the optimum number of primary channels to support a desired level of expected latency. In doing so, this paper introduces a cognitive radio based MAC, which can effectively co-exists with primary CSMA/CA networks by accurately estimating the start of the spectrum holes, reliably modeling channel occupation by the primary users, and using event-driven sensing to adaptively control the sensing frequency and interval. Simulation results with ns-2.33 reveal that a CR network based on the proposed MAC can achieve the targeted service delay time by appropriately selecting optimal WLAN primary channels.
- Publisher
- Melbourne, VIC IEEE Computer Society
- Relation
- 12th IEEE International Conference on High Performance Computing and Communications p. 616-622
- Rights
- This metadata is freely available under a CCO license
- Subject
- Carrier sense multiple access; Cognitive radio; Delays; Jitter; Quality of service; Wireless LAN
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