Spatial opportunity for cognitive radio systems with heterogeneous path loss conditions

Kentaro Nishimori, Rocco Di Taranto, Hiroyuki Yomo, Petar Popovski, Yasushi Takatorit, Ramjee Prasad, Shuji Kubota

Research output: Chapter in Book/Report/Conference proceedingConference contribution

28 Citations (Scopus)

Abstract

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 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.

Original languageEnglish
Title of host publication2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring
Pages2631-2635
Number of pages5
DOIs
Publication statusPublished - 2007 Aug 2
Externally publishedYes
Event2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring - Dublin, Ireland
Duration: 2007 Apr 222007 Apr 25

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)1550-2252

Conference

Conference2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring
CountryIreland
CityDublin
Period07/4/2207/4/25

Keywords

  • Antenna height
  • Cognitive radio
  • Directional antenna
  • Heterogenous propagation path loss conditions
  • Reusable area

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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  • Cite this

    Nishimori, K., Taranto, R. D., Yomo, H., Popovski, P., Takatorit, Y., Prasad, R., & Kubota, S. (2007). Spatial opportunity for cognitive radio systems with heterogeneous path loss conditions. In 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring (pp. 2631-2635). [4212969] (IEEE Vehicular Technology Conference). https://doi.org/10.1109/VETECS.2007.541