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Cell outage compensation in LTE networks: Algorithms and performance assessment

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Author: Amirijoo, M. · Jorguseski, L. · Litjens, R. · Schmelz, L.C.
Type:article
Date:2011
Source:2011 IEEE 73rd Vehicular Technology Conference, VTC2011-Spring, 15-18 May 2011, Budapest, Hungary.
Identifier: 436030
doi: doi:10.1109/VETECS.2011.5956497
Keywords: Informatics · Compensation algorithm · Control parameters · Mobile wireless network · Outage management · Performance assessment · Received power · Self-organising · Simulation result · Algorithms · Cells · Mathematical operators · Quality of service · Wireless networks · Outages · Communication & Information Communication · NT - Network Technology PNS - Performance of Networks & Services · TS - Technical Sciences

Abstract

Cell outage compensation is a self-healing function and as such part of the Self-Organising Networks concept for mobile wireless networks. It aims at mitigating the degradation of coverage, capacity and service quality caused by a cell or site level outage. Upon detection of such an outage, cell outage compensation tunes a variety of control parameters, e.g., electrical antenna tilt and uplink target received power level, in cells surrounding the affected site, in order to minimise the outage-induced performance effects in accordance with the operator policy. In this paper we outline the cell outage management framework, propose concrete compensation algorithms and assess the achieved performance effects in various scenarios. The reported simulation results show that the proposed compensation algorithm is able to recover a significant percentage of the users that would otherwise be dropped, while still providing sufficient service quality in the compensating cells. © 2011 IEEE.