Voice-Centric LTE Femtocells and Improper Graph Colorings

Luis Guilherme Uzeda Garcia, Klaus Pedersen, Preben Mogensen

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

2 Citations (Scopus)
699 Downloads (Pure)


This paper addresses carrier-based inter-cell interference coordination (CB-ICIC) among LTE femtocells operating on a single carrier. CB-ICIC is in many ways linked to the widely investigated dynamic channel assignment problem, which is often studied in the context of graph coloring. The investigation revolves around the sensible definition of the underlying graph, i.e. the network model, rather than focusing on the coloring algorithms and their properties. Ultimately, we posit that improper online graph-coloring suffices and is actually preferable. In short, settling for less-than-optimal configurations avoids uncontrolled service interruptions. Such disruptions tend to raise understandable concerns when it comes to fully autonomous selection of operational CCs. Our results dispel such concerns by showing that conservative methods can achieve most of the benefits of unrestricted off-line coloring algorithms with a very modest number (2-3) of CCs to choose from.
Original languageEnglish
Title of host publication2012 IEEE 75th Vehicular Technology Conference (VTC Spring)
Number of pages5
PublisherIEEE Press
Publication dateApr 2012
ISBN (Print)978-1-4673-0989-9
ISBN (Electronic)978-1-4673-0988-2
Publication statusPublished - Apr 2012
Event2012 IEEE 75th Vehicular Technology Conference - Yokohama, Japan
Duration: 6 May 20129 May 2012


Conference2012 IEEE 75th Vehicular Technology Conference
SeriesI E E E V T S Vehicular Technology Conference. Proceedings


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