A distributed network coded control channel for multihop cognitive radio networks
Designing a solution for multihop cognitive radio networks poses several challenges such as the realization of the control channel, the detection of primary users, and the coordination of secondary users for dynamic spectrum access purposes. In this article we discuss these challenges and propose a...
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| Veröffentlicht in: | IEEE network 2009, Vol.23 (4), p.26-32 |
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| creator | Asterjadhi, A. Baldo, N. Zorzi, M. |
| description | Designing a solution for multihop cognitive radio networks poses several challenges such as the realization of the control channel, the detection of primary users, and the coordination of secondary users for dynamic spectrum access purposes. In this article we discuss these challenges and propose a solution that aims to meet most of them. The proposed solution is completely distributed, and does not need dedicated spectrum resources for control purposes, but rather leverages on a virtual control channel that is implemented by having users exchange control information whenever they meet in a particular channel, using network coding techniques for better dissemination performance. Due to these aspects, our proposal represents a significant improvement over existing dynamic spectrum access and multichannel MAC solutions. We discuss the effectiveness of our scheme in multihop cognitive ad hoc networks, where secondary users need to opportunistically access the spectrum at those locations and times at which it is not used by primary users. Finally, we report the results of an evaluation study assessing the performance of the proposed scheme with respect to different system and scenario parameters. |
| doi_str_mv | 10.1109/MNET.2009.5191143 |
| format | Article |
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| source | IEEE Electronic Library (IEL) |
| subjects | Access control Ad hoc networks Channels Coding Cognitive radio Communication system control Distributed control Dynamics Multichannel Network coding Networks Proposals Radio Radio control Spread spectrum communication Switches Telecommunication control |
| title | A distributed network coded control channel for multihop cognitive radio networks |
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