Cooperative Transmission in Cognitive Radio Ad Hoc Networks
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 sp...
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| Format: | Article |
| Language: | English |
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Wiley
2012-05-01
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| Series: | International Journal of Distributed Sensor Networks |
| Online Access: | https://doi.org/10.1155/2012/863634 |
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| _version_ | 1850218637862895616 |
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| author | Juncheng Jia Shukui Zhang |
| author_facet | Juncheng Jia Shukui Zhang |
| author_sort | Juncheng Jia |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-320de509852047d79d7fadbfd4e31c2d |
| institution | OA Journals |
| issn | 1550-1477 |
| language | English |
| publishDate | 2012-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Distributed Sensor Networks |
| spelling | doaj-art-320de509852047d79d7fadbfd4e31c2d2025-08-20T02:07:40ZengWileyInternational Journal of Distributed Sensor Networks1550-14772012-05-01810.1155/2012/863634Cooperative Transmission in Cognitive Radio Ad Hoc NetworksJuncheng Jia0Shukui Zhang1 School of Computer Science and Technology, Soochow University, Suzhou 215006, China State Key Laboratory for Novel Software Technology, Nanjing University, Nanjin 210093, ChinaCognitive 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.https://doi.org/10.1155/2012/863634 |
| spellingShingle | Juncheng Jia Shukui Zhang Cooperative Transmission in Cognitive Radio Ad Hoc Networks International Journal of Distributed Sensor Networks |
| title | Cooperative Transmission in Cognitive Radio Ad Hoc Networks |
| title_full | Cooperative Transmission in Cognitive Radio Ad Hoc Networks |
| title_fullStr | Cooperative Transmission in Cognitive Radio Ad Hoc Networks |
| title_full_unstemmed | Cooperative Transmission in Cognitive Radio Ad Hoc Networks |
| title_short | Cooperative Transmission in Cognitive Radio Ad Hoc Networks |
| title_sort | cooperative transmission in cognitive radio ad hoc networks |
| url | https://doi.org/10.1155/2012/863634 |
| work_keys_str_mv | AT junchengjia cooperativetransmissionincognitiveradioadhocnetworks AT shukuizhang cooperativetransmissionincognitiveradioadhocnetworks |