Cognitive Radio Oriented Wireless Networks. 10th International Conference, CROWNCOM 2015, Doha, Qatar, April 21–23, 2015, Revised Selected Papers

Research Article

Downlink Scheduling and Power Allocation in Cognitive Femtocell Networks

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  • @INPROCEEDINGS{10.1007/978-3-319-24540-9_8,
        author={Hesham Elmaghraby and Dongrun Qin and Zhi Ding},
        title={Downlink Scheduling and Power Allocation in Cognitive Femtocell Networks},
        proceedings={Cognitive Radio Oriented Wireless Networks. 10th International Conference, CROWNCOM 2015, Doha, Qatar, April 21--23, 2015, Revised Selected Papers},
        proceedings_a={CROWNCOM},
        year={2015},
        month={10},
        keywords={Cognitive femtocell Cross-tier interference Resource assignment Outage constraint Power allocation},
        doi={10.1007/978-3-319-24540-9_8}
    }
    
  • Hesham Elmaghraby
    Dongrun Qin
    Zhi Ding
    Year: 2015
    Downlink Scheduling and Power Allocation in Cognitive Femtocell Networks
    CROWNCOM
    Springer
    DOI: 10.1007/978-3-319-24540-9_8
Hesham Elmaghraby1,*, Dongrun Qin1,*, Zhi Ding1,*
  • 1: University of California
*Contact email: hmelmaghraby@ucdavis.edu, drqin@ucdavis.edu, zding@ucdavis.edu

Abstract

We consider resource assignment and power allocation problem in femtocells under channel estimation errors. Our formulation is to maximize the throughput of femtocell users that share spectrum resources with macrocell base station (MBS) while limiting interference between macrocell and femtocells. Using cognitive capabilities, femtocell basestations (FBS) can acquire the needed information about the neighboring MBS users to reduce cross-tier interference between FBS and MBS users. We analyze the distributions of signal to interference and noise ratio (SINR) of MBS users and signal to interference ratio (SIR) of FBS users. Based on the analytical results, we present resource assignment and power allocation solutions to maximize the mean sum rate subject to SINR and SIR outage constraints, along with simulation verifications.