Copyright © 2008 The Institute of Electronics, Information and Communication Engineers
Special Section on Cognitive Radio and Spectrum Sharing Technology -- Papers -- Cognitive Network |
Topology Management and Route Establishment Method for Base Station Networks Using Cognitive Radio*
1 The authors are with KDDI R&D Laboratories, Inc., Fujimino-shi, 356-8502 Japan. E-mail: yujin{at}kddilabs.jp
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Abstract |
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Cognitive radio, which utilizes the radio frequency spectrum efficiently by recognizing radio resource availability, is an attractive technology for overcoming the shortage of radio frequency. From the perspective of networking, cognitive radio technologies are also useful since they allow flexible network construction. This paper proposes base station networks using cognitive radio technologies. In order to achieve efficient utilization of the radio frequency spectrum and flexible network construction, we also propose a topology management and route control method for our proposed base station network. Our method shares the status of the wireless links along with topology information and establishes routes by using this information. Through simulation, we evaluate that our method significantly improves the throughput by efficient utilization of the radio frequency spectrum. Moreover, we demonstrate that our method works well when the size of the network gets larger.
Key Words: cognitive radio, topology management, routing, mobile ad-hoc networks, mesh networks, wireless interference
Manuscript received May 7, 2007. Manuscript revised July 20, 2007.
* This paper has been conducted under a research contract for cognitive radio technology organized by the Ministry of Internal Affairs and Communications, Japan.