NDLI: Cognitive Radio Using Multi-transmission Links: A novel approach effective in metropolitan areas

Content Provider	IEEE Xplore Digital Library
Author	Takeuchi, Kazunori Fukuhara, Tadayuki Nomura, Shingo Yamamoto, Shu
Copyright Year	2007
Description	Author affiliation: KDDI R&D Laboratories, YRP Research Center, YRP No. 3 Bldg., Hikarinooka 7-1, 239-9847 Yokosuka city, Kanagawa, JAPAN, ka-takeuchi@kddilabs.jp (Takeuchi, Kazunori) \|\| KDDI R&D Laboratories, YRP Research Center, YRP No. 3 Bldg., Hikarinooka 7-1, 239-9847 Yokosuka city, Kanagawa, JAPAN, sy-yamamoto@kddilabs.jp (Yamamoto, Shu) \|\| KDDI R&D Laboratories, YRP Research Center, YRP No. 3 Bldg., Hikarinooka 7-1, 239-9847 Yokosuka city, Kanagawa, JAPAN, fukuhara@kddilabs.jp (Fukuhara, Tadayuki) \|\| KDDI R&D Laboratories, YRP Research Center, YRP No. 3 Bldg., Hikarinooka 7-1, 239-9847 Yokosuka city, Kanagawa, JAPAN, sh-nomura@kddilabs.jp (Nomura, Shingo)
Abstract	Although the definition of cognitive radio is still being discussed by IEEE P1900 and other organizations, the objective of cognitive radio addresses improvements in frequency utilization, flexible selection of optimal frequency bands, wireless channel bandwidth, modulation schemes, and access methods. In metropolitan areas, a huge number of wireless stations consume a variety of frequency bands. In such a radio environment, it is difficult to continuously utilize DSA (Dynamic Spectrum Access) because of the lack of vacant areas for secondary usage. Although if a wireless station feeds its transmission data to the wireless system with the largest margin of capability packet-by-packet, it effectively utilizes the "white space" and improves the performance of all wireless connections. The cognitive radio system proposed in this paper has the advantage of implementing existing wireless technologies within the current wireless regulations. This paper introduces cognitive radio using multi-transmission methods and its implementation. The estimated method of defining the margin of the wireless system second-by-second also addresses the universal index for various wireless systems.
Starting Page	291
Ending Page	297
File Size	6568702
Page Count	7
File Format	PDF
ISBN	9781424408146
DOI	10.1109/CROWNCOM.2007.4549813
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-08-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless LAN Base stations Urban areas Switches Cognitive radio Convergence cognitive radio Space technology radio resouce recognition multi-transmission white space White spaces Frequency Communication system traffic control
Content Type	Text
Resource Type	Article

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