Università di Pisa
Sistema bibliotecario di ateneo

A distributed power-saving framework for LTE Het-Nets exploiting Almost Blank Subframes

Virdis, Antonio and Stea, Giovanni and Sabella, Dario and Caretti, Marco (2017) A distributed power-saving framework for LTE Het-Nets exploiting Almost Blank Subframes. Technical Report del Dipartimento di Informatica, TR . Università di Pisa, Pisa, IT. (Submitted)

PDF (Technical Report - ABS) - Supplemental Material
Available under License Creative Commons Attribution No Derivatives.

Download (2383Kb) | Preview


    Almost Blank Subframes (ABS) have been defined in LTE as a means to coordinate transmissions in heterogeneous networks (HetNets), composed of macro and micro eNodeBs: the macro issues ABS periods, and refrains from transmitting during ABSs, thus creating interference-free subframes for the micros. Micros report their capacity demands to the macro via the X2 interface, and the latter provisions the ABS period accordingly. Existing algorithms for ABS provisioning usually share resources proportionally among HetNet nodes in a long-term perspective (e.g., based on traffic forecast). We argue instead that this mechanism can be exploited to save power in the HetNet: in fact, during ABSs, the macro consumes less power, since it only transmits pilot signals. Dually, the micros may inhibit data transmission themselves in some subframes, and optimally decide when to do this based on knowledge of the ABS period. This allows us to define a power saving framework that works in the short term, modifying the ABS pattern at the fastest possible pace, serving the HetNet traffic at reduced power cost. Our framework is designed using only standard signaling. Simulations show that the algorithm consumes less power than its competitors, especially at low loads, and improves the UE QoS.

    Item Type: Book
    Uncontrolled Keywords: LTE, Interference Control, ABS, e-ICIC
    Subjects: Area09 - Ingegneria industriale e dell'informazione > ING-INF/05 - Sistemi di elaborazione delle informazioni
    Divisions: Dipartimenti (from 2013) > DIPARTIMENTO DI INGEGNERIA DELL'INFORMAZIONE
    Depositing User: Prof. Giovanni Stea
    Date Deposited: 09 Jun 2017 09:10
    Last Modified: 09 Jun 2017 09:10
    URI: http://eprints.adm.unipi.it/id/eprint/2370

    Repository staff only actions

    View Item