Analysis and management of heterogeneous user mobility in large-scale downlink systems
2013 (English)In: 2013 Asilomar Conference on Signals, Systems and Computers, IEEE Computer Society, 2013, 773-777 p.Conference paper (Refereed)
Modern cellular networks need to serve user terminals with large disparities in mobility, which incurs different accuracy of the channel state information for each user. The impact of such heterogeneous mobility on the multi-cell downlink is analyzed in this paper. The base stations serve a multitude of users by coordinated beamforming. We derive deterministic equivalents for the user performance in a large scale system where the number of transmit antennas and user terminals grow large at a fixed ratio. We show that low and high mobility users can coexist and be served simultaneously, since the CSI imperfections of a user only harms the performance of this particular user. Simulations are used to verify the applicability of our large scale approximations for systems of practical dimensions. Furthermore, we show that the performance of high mobility users can be improved by explicitly managing the user priorities in the network.
Place, publisher, year, edition, pages
IEEE Computer Society, 2013. 773-777 p.
, Asilomar Conference on Signals, Systems and Computers. Conference Record, ISSN 1058-6393
Cellular network, Coordinated beamforming, Deterministic equivalents, Downlink systems, Heterogeneous users, Transmit antenna, User performance, User priorities
IdentifiersURN: urn:nbn:se:kth:diva-147294DOI: 10.1109/ACSSC.2013.6810390ScopusID: 2-s2.0-84901278576ISBN: 978-1-4799-2388-5OAI: oai:DiVA.org:kth-147294DiVA: diva2:729538
2013 47th Asilomar Conference on Signals, Systems and Computers; Pacific Grove, CA; United States; 3 November 2013 through 6 November 2013
QC 201406262014-06-262014-06-252014-06-26Bibliographically approved