| 講演抄録/キーワード |
| 講演名 |
2007-05-17 13:50
Spatial opportunity for cognitive radios under directional interference ○Kentaro Nishimori・Rocco Di Taranto(NTT)・Hiroyuki Yomo・Petar Popovski(Aalborg Univ.)・Yasushi Takatori(NTT)・Ramjee Prasad(Aalborg Univ.)・Shuji Kubota(NTT) AP2007-15 |
| 抄録 |
(和) |
本報告では,大(中)ゾーンのPrimaryシステムと小ゾーンのSecondaryシステム
の共存を考えた場合において,Secondaryシステムの空間的な利用効率
(Re-usable area)を導出する.特に,本報告では,Primaryシステムと
Secondaryシステムの伝搬パスロスの違いにより,Secondaryシステムの
Re-usable areaがどの程度変化するかを明らかにする.この評価のために,
送受信のアンテナ高に対するパスロス係数を変化させることが可能な伝搬
パスロスモデルを導入する.数値計算により,Primary/Secondary
システムのアンテナ高の違いがRe-usable areaに大きく影響を与えることを
示す |
| (英) |
In this paper, the possibility for a short--range cognitive radio
(secondary communication system) to be located within the service
area of the primary system is discussed. Although the secondary
system interferes with the primary system, there can be certain
locations in the service area of the primary system where the
cognitive radio can reuse the frequency of the primary system
without disturbing it or being disturbed by the primary system. We
say that in those locations there is a emph{spatial opportunity}
for communication in the secondary system. The primary and
secondary systems have different features and usage scenarios,
which result in different deployment conditions. This gives rise
to differences between the path loss for a link in the primary
system and the path loss for the interference from the primary to
secondary systems. This paper investigates the impact of the
heterogeneous path loss conditions on the spatial opportunity for
the secondary system. Our approach can be applied as a general way
to investigate the coexistence among multiple systems. We clarify
that the change of the path loss coefficient due to the different
antenna heights of the primary and secondary systems can largely
affect the spatial opportunity for frequency reuse by the
cognitive radios. |
| キーワード |
(和) |
Cognitive無線 / Re-usableエリア / 異種伝搬パスロスモデル / 指向性アンテナ / アンテナ高 / / / |
| (英) |
Cognitive radio / reusable area / heterogenous propagation path loss conditions / directional antenna / antenna height / / / |
| 文献情報 |
信学技報, vol. 107, no. 35, AP2007-15, pp. 13-18, 2007年5月. |
| 資料番号 |
AP2007-15 |
| 発行日 |
2007-05-10 (AP) |
| ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
| PDFダウンロード |
AP2007-15 |