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[HPR16b] Uplink Resource Allocation in Cooperative OFDMA with Multiplexing Mobile Relays
Revue Internationale avec comité de lecture : Journal EURASIP Journal on Wireless Communications and Networking, pp. -, 2016, (doi:10.1186/s13638-016-0704-3)Mots clés: Multiplexing mobile Relays, resource allocation, OFDMA, required QoS, optimization problem, uplink
Résumé:
Cooperative relaying is an important feature for the 4th Generation wireless system to upgrade
system performance. Mobile relays can offer better results than fixed relays without any additional
infrastructure cost. However, efficient cooperation decision as well as resource allocation are critical to
satisfy model constraints as required quality of service (QoS). In this work, simple mobile users with
advantageous channels can act as potential relays for cell edge users for an uplink transmission. They
multiplex, in the frequency domain, their own data to that of the relayed sources, with the objective for
both relay and sources to reach a target data rate. An optimal joint Resource Blocks (RB) allocation and
Power Allocation scheme under a required data rate constraint per user is proposed. The optimization
problem is formulated to minimize the total system power. Dual decomposition and subgradient method
are used to solve the optimization problem after dividing it into independent subproblems with less
complexity to find the optimal solution. The cooperation decision and the sources-relays association is
either performed as a first step of resource allocation, or jointly optimized with RB and power allocation.
Simulation results show that these proposed algorithms both reduce system’s power consumption while
ensuring the required QoS. Joint optimization of relay selection, RB and power allocation provides a
higher power consumption decrease, but requires higher complexity and overhead.
Commentaires:
URL: http://www.jwcn.eurasipjournals.com/content/2016/1/215
Collaboration:
6'Tel
BibTeX
| @article { | |||
| HPR16b, | |||
| title | = | "{Uplink Resource Allocation in Cooperative OFDMA with Multiplexing Mobile Relays}", | |
| author | = | "S. Hamda and M. Pischella and D. Roviras and R. Bouallegue", | |
| journal | = | "EURASIP Journal on Wireless Communications and Networking", | |
| year | = | 2016, | |
| pages | = | "-", | |
| note | = | "{URL: http://www.jwcn.eurasipjournals.com/content/2016/1/215}", | |
| doi | = | "10.1186/s13638-016-0704-3", | |
| } | |||
