7th International Conference on Cognitive Radio Oriented Wireless Networks

Research Article

Shadow Chasing : A Resource Allocation Scheme For Heterogeneous Networks

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  • @INPROCEEDINGS{10.4108/icst.crowncom.2012.248568,
        author={Ahmed Elsherif and Zhi Ding and Xin Liu and Jyri H\aa{}m\aa{}l\aa{}inen and Risto Wichman},
        title={Shadow Chasing : A Resource Allocation Scheme For Heterogeneous Networks},
        proceedings={7th International Conference on Cognitive Radio Oriented Wireless Networks},
        publisher={IEEE},
        proceedings_a={CROWNCOM},
        year={2012},
        month={7},
        keywords={femtocells hetnets resource allocation interference control},
        doi={10.4108/icst.crowncom.2012.248568}
    }
    
  • Ahmed Elsherif
    Zhi Ding
    Xin Liu
    Jyri Hämäläinen
    Risto Wichman
    Year: 2012
    Shadow Chasing : A Resource Allocation Scheme For Heterogeneous Networks
    CROWNCOM
    IEEE
    DOI: 10.4108/icst.crowncom.2012.248568
Ahmed Elsherif1,*, Zhi Ding2, Xin Liu3, Jyri Hämäläinen4, Risto Wichman4
  • 1: Graduate Student, ECE, UC Davis, USA
  • 2: Prof., ECE, UC Davis, USA
  • 3: Assoc. Prof., CS, UC , USA
  • 4: Prof., Aalto University, Finland
*Contact email: arelsherif@ucdavis.edu

Abstract

In this paper, we propose a resource allocation scheme for interference mitigation in heterogeneous networks to serve both Macrocell User Equipments (MUEs) and Home User Equipments (HUEs). In the proposed Shadow Chasing scheme, the Home eNB (HeNB) uses Downlink Control Information (DCI) together with ACK/NAK feedback to assign its HUEs the Physical Resource Blocks (PRBs) that are assigned to outdoor MUEs. Since the HeNB receives an outdated DCI due to backhaul delay, our Shadow Chasing algorithm (SCA) determines a likelihood metric for each PRB being either vacant or assigned to an outdoor MUE. By dynamically separating the MUE and HUE PRB assignments, SCA can control the downlink interference to the MUE. Our numerical examples demonstrate effective reduction of probability of PRB assignment collision and MUE interference over random assignment or DCI based assignment without integrating the delay effect nor the ACK/NAK signal.