Cell Outage Detection and Compensation in Two-Tier Heterogeneous NetworksReport as inadecuate




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International Journal of Antennas and Propagation - Volume 2014 2014, Article ID 624858, 9 pages -

Research ArticleWireless Signal Processing and Network Lab, Key Laboratory of Universal Wireless Communications, Ministry of Education, Beijing University of Posts & Telecommunications, Beijing 100876, China

Received 14 February 2014; Accepted 18 April 2014; Published 13 May 2014

Academic Editor: Xiang Zhang

Copyright © 2014 Wenqian Xue et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Heterogeneous networks HetNets can increase network capacitythrough complementing the macro-base-station with low-power nodes, in response to the ongoing exponential growth in datatraffic demand. While, unprecedented challenges exist in theplanning, optimization, and maintenance in HetNets, especially activities such as cell outage detection and mitigation arelabor-intensive and costly. One potential solution to address theseissues is to introduce the extensively attracted self-organizingnetwork SON. This paper is mainly devoted to cell outage detectionand compensation methods in two-tier HetNets where macrocell andpicocells are coexisted. A -nearest neighbor KNN classificationalgorithm is employed to detect the cell outage automatically. Consider the breakdown picocell can reload its degraded service tothe overlapped macrocell via vertical handover; only the breakdownmacrocell executes the performance compensation. Power adjustment oneach resource block is carried out via Lagrange optimizing algorithmto compensate the breakdown cell. Through intensive numericalexperiments, with the help of our proposal, the outage cells can besuccessfully detected and performance gain for the outage macrocellcan reach 91.4% with .





Author: Wenqian Xue, Hengzhi Zhang, Yong Li, Dong Liang, and Mugen Peng

Source: https://www.hindawi.com/



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