- Title
- Sum throughput maximization for heterogeneous multicell networks with RF-powered relays
- Creator
- Nasir, Ali A.; Ngo, Duy T.; Zhou, Xiangyun; Kennedy, Rodney A.; Durrani, Salman
- Relation
- 2015 IEEE International Conference on Communications (ICC). Proceedings of the 2015 IEEE International Conference on Communications (London 8-12 June, 2015) p. 2196-2202
- Relation
- ARC.DP140101133
- Publisher Link
- http://dx.doi.org/10.1109/ICC.2015.7248651
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- conference paper
- Date
- 2015
- Description
- This paper considers a heterogeneous multicell network where the base station (BS) in each cell communicates with its cell-edge user with the assistance of an amplify-and-forward relay node. Equipped with a power splitter and a wireless energy harvester, the relay scavenges RF energy from the received signals to process and forward the information. In the face of strong intercell interference and limited radio resources, we develop a resource allocation scheme that jointly optimizes (i) BS transmit powers, (ii) power splitting factors for energy harvesting and information processing at the relays, and (iii) relay transmit powers. To solve the highly non-convex problem formulation of sum-rate maximization, we propose to apply the successive convex approximation (SCA) approach and devise an iterative algorithm based on geometric programming. The proposed algorithm transforms the nonconvex problem into a sequence of convex problems, each of which is solved very efficiently by the interior-point method. We prove that our developed algorithm converges to an optimal solution that satisfies the Karush-Kuhn-Tucker conditions of the original nonconvex problem. Numerical results confirm that our joint optimization solution substantially improves the network performance, compared to the existing solution wherein only the received power splitting factors at the relays are optimized.
- Subject
- relays; approximation methods; wireless communication; interference; energy harvesting; approximation algorithms; transceivers
- Identifier
- http://hdl.handle.net/1959.13/1317293
- Identifier
- uon:23385
- Identifier
- ISBN:9781467364324
- Language
- eng
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