4th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications

Research Article

Opportunistic band sharing for point-to-point link connection of cognitive radios

  • @INPROCEEDINGS{10.1109/CROWNCOM.2009.5188994,
        author={Hyewon Lee and Kwanghun  Han and Youngwoo  Hwang and Sunghyun  Choi},
        title={Opportunistic band sharing for point-to-point link connection of cognitive radios},
        proceedings={4th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2009},
        month={8},
        keywords={Cognitive radio opportunistic underlay spectrum sharing point-to-point communication.},
        doi={10.1109/CROWNCOM.2009.5188994}
    }
    
  • Hyewon Lee
    Kwanghun Han
    Youngwoo Hwang
    Sunghyun Choi
    Year: 2009
    Opportunistic band sharing for point-to-point link connection of cognitive radios
    CROWNCOM
    IEEE
    DOI: 10.1109/CROWNCOM.2009.5188994
Hyewon Lee1,*, Kwanghun Han1,*, Youngwoo Hwang1,*, Sunghyun Choi1,*
  • 1: The School of Electrical Engineering and INMC, Seoul National University, Seoul 151-744, Korea.
*Contact email: hwlee@mwnl.snu.ac.kr , khhan@mwnl.snu.ac.kr , ywhwang@mwnl.snu.ac.kr , schoi@snu.ac.kr

Abstract

Cognitive radios are typically known to exploit vacant spectrum resources yet not interfering with primary communication systems. However, cognitive radios may not be able to secure a clear spectrum band, i.e., white hole, in certain environments. Underlay spectrum sharing provides a way to cope with such a spectrum sharing problem in a bustling spectrum band; cognitive radios share the spectrum band with the spectrum licensees, i.e., primary users, by adjusting signal transmit power so as not to severely deteriorate the performance of the primary users. In this paper, we propose an underlay spectrum sharing policy for cognitive radios. Primary users are assumed to form a cellular network, and a point-to-point link of cognitive radio leverages uplink spectrum resource of the primary network. We formulate the transmit power constraints of the cognitive radio transmitter and propose a practical uplink band sharing framework. We also demonstrate that such an uplink band sharing can enhance the throughput performance of point- to-point link, while the interference to the primary users can be regulated under the allowed level decided by the primary users.