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Power control and clustering in heterogeneous cellular networks
Driouch E., Ajib W., Assi C. Wireless Networks23 (8):2509-2520,2017.Type:Article
Date Reviewed: Jan 23 2018

Alongside traditional macrocellular wireless communication systems, heterogeneous and new small-cell platforms are growing more than ever. Consequently, the constructive coexistence of these technologies is essential; it can happen through collaboration, to mitigate the destructive effects of interference and acquire higher values of capacity and data rate transmission.

Following a complete and comprehensive abstract is a specific and coherent literature review focusing on zero-forcing beamforming (ZFBF), precoding at multiuser multi-input multi-output (MIMO) antennas, cooperation in multicellular systems, and coalitional game theory ideas. Then, the authors start their main discussion.

An arguably centralized method for controlling the network, from the core of a communication system, is proposed, comprising a centralized cooperation scheme to reach the objectives. The performance of the downlink communication, at a geographical area, with multiple small base stations (SBS) in a cluster and a macro base station (MBS) via a common frequency band is considered. A small-cell user (SU) would suffer from interference of the other SBSs (co-tier), MBSs (cross-tier), and other clusters (intercluster). The problem is modeled mathematically and formulated to achieve the maximum sum rate and maximize the minimum rate for an individual node by optimization problem solving; an algorithm is provided to implement the clustering according to the optimization criteria. Finally, simulation results are demonstrated that compare the three heuristics of cluster forming.

The paper is well structured; however, despite its good start, it loses its integrity during the development of its ideas and progresses to a scattered and distracted argument. In the simulation results, I expected to see a comparison with the previous distributed schemes, in which the paper could exhibit its superiority, significance, and novelty. This was a good effort, but it is not mature enough.

Reviewer:  Mohammad Sadegh Kayhani Pirdehi Review #: CR145802 (1805-0237)
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