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On the Route Priority for Cognitive Radio Networks.
- Source :
- IEEE Transactions on Communications; Sep2015, Vol. 63 Issue 9, p3103-3117, 15p
- Publication Year :
- 2015
-
Abstract
- To fully unleash the potentials of the cognitive radio (CR) paradigm, new challenges must be addressed. Specifically, as regards the network layer, the problem of the <bold> route priority</bold>, i.e., the problem of prioritizing the routes for the CR packet transmission, is crucial, since the communication opportunities provided by a route are deeply affected by the primary-user (PU) activity. Furthermore, whenever the CR network layer exploits proactively acquired information on the PU activity, update packets need to be exchanged among the CR users, inducing so a route overhead independently of the adopted routing protocol. Hence, in this paper, we analytically derive the <bold> optimal route priority rule</bold>, i.e., the route priority rule maximizing the achievable capacity, by jointly accounting for the PU activity and the route overhead. To this aim, at first, we formulate the <bold> optimal route priority problem</bold>, and we prove that its computational complexity through exhaustive search is exponential. Then, we provide the closed-form expressions of the achievable capacity. Stemming from these expressions, we derive the optimal route priority, and we design a computational-efficient search algorithm. All the theoretical results are derived by adopting two routing strategies and two PU activity models. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00906778
- Volume :
- 63
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Communications
- Publication Type :
- Academic Journal
- Accession number :
- 109349101
- Full Text :
- https://doi.org/10.1109/TCOMM.2015.2459039