When energy harvesting (EH) technique is applied in Internet of Things (IoT) to replenish energy for low power consumption sensing nodes, e.g., sensors and radio frequency identification (RFID) tags, the end-to-end (e2e) data rate is usually maximized without accounting for the energy consumption at the nodes. In this paper, however, the energy consumption at secondary users (SUs) along a cognitive relaying link is characterized by means of energy efficiency, defined as the achievable data rate per Joule. In particular, the energy states at each node is modelled as a finite-state Markov chain and the transmit power at a node is optimally allocated by jointly accounting for the interference threshold prescribed by primary users (PUs), the maximum allowable transmit power and the harvested energy at the node. To maximize the energy efficiency, a best relay selection criterion is proposed and the subsequent optimal transmit power allocation is initially formulated as a nonlinear fractional programming problem and, then, equivalently transformed into a parametric programming problem and, finally, solved analytically by using the classic Karush-Kuhn-Tucker (KKT) conditions. With extensive Monte-Carlo simulation results, the effectiveness of the proposed relay selection algorithm and corresponding optimal power allocation strategy are corroborated, in terms of the energy efficiency of SUs.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Energy States Aided Relay Selection for Cognitive Relaying Transmission


    Beteiligte:
    Xia, Minghua (Autor:in) / Tang, Dong (Autor:in) / Jiang, Dandan (Autor:in) / Xing, Chengwen (Autor:in)


    Erscheinungsdatum :

    01.09.2016


    Format / Umfang :

    337357 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Performance of Incremental Relaying with an Energy-Buffer Aided Relay

    Bapatla, Dileep / Prakriya, Shankar | IEEE | 2019



    Optimal Resource Allocation and Relay Selection for Self-Sustainable Relaying Networks

    Deep, M. Prudhvi / Jain, Shubham / Ubaidulla, P. | IEEE | 2017


    Cognitive Covert Transmission Aided by Energy Harvesting

    Xie, Rong / Chen, Rui / Hu, Kecong | IEEE | 2024


    A Multiple Relay Selection Scheme in Cognitive Relay Network

    Xu, Jiali / Zhang, Haixia / Yuan, Dongfeng | Springer Verlag | 2012