Cooperative Transmission in Cognitive Radio Ad Hoc Networks
Joint Authors
Source
International Journal of Distributed Sensor Networks
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-22
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Telecommunications Engineering
Information Technology and Computer Science
Abstract EN
Cognitive radio technology is the key to realize dynamic spectrum access system and promote the spectrum utilization through exploiting the spectrum holes left by primary users.
However, the spatial heterogeneity of spectrum availability imposes special challenges for efficient utilization of the spectrum resources for cognitive radio ad hoc networks (CRAHNs).
The cross-layer cooperative transmission scheme is a promising approach to improve the efficiency of spectrum utilization and improve the performance of cognitive radio networks.
Such an approach leverages relay-assisted discontiguous OFDM (DOFDM) for data transmission at physical and MAC layers in a basic three-node configuration.
With this scheme, a relay node will be selected that can bridge the source and the destination using its common channels between those two nodes.
In this paper, we investigate the application of such a cooperative transmission scheme to address the spectrum heterogeneity issue in CRAHNs.
In particular, we describe several types of cooperative transmission and formulate a new resource allocation problem with joint relay selection and channel allocation.
We propose a heuristic algorithm to solve the resource allocation problem, which is based on the metric of utility-spectrum ratio of transmission groups.
Simulations demonstrate the performance improvement of the cooperative transmission over the direct transmission.
American Psychological Association (APA)
Jia, Juncheng& Zhang, Shukui. 2012. Cooperative Transmission in Cognitive Radio Ad Hoc Networks. International Journal of Distributed Sensor Networks،Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-504410
Modern Language Association (MLA)
Jia, Juncheng& Zhang, Shukui. Cooperative Transmission in Cognitive Radio Ad Hoc Networks. International Journal of Distributed Sensor Networks No. 2012 (2012), pp.1-10.
https://search.emarefa.net/detail/BIM-504410
American Medical Association (AMA)
Jia, Juncheng& Zhang, Shukui. Cooperative Transmission in Cognitive Radio Ad Hoc Networks. International Journal of Distributed Sensor Networks. 2012. Vol. 2012, no. 2012, pp.1-10.
https://search.emarefa.net/detail/BIM-504410
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-504410