Beam-searching and Transmission Scheduling in Millimeter Wave Communications
2015 (English)In: 2015 IEEE International Conference on Communications (ICC), IEEE conference proceedings, 2015, Vol. 2015, 1292-1297 p.Conference paper (Refereed)
Millimeter wave (mmWave) wireless networks relyon narrow beams to support multi-gigabit data rates. Nevertheless, the alignment of transmitter and receiver beams is a time consuming operation, which introduces an alignment-throughput tradeoff. A wider beamwidth reduces the alignment overhead,but leads also to reduced directivity gains. Moreover, existing mmWave standards schedule a single transmission in eachtime slot, although directional communications facilitate multiple concurrent transmissions. In this paper, a joint consideration ofthe problems of beamwidth selection and scheduling is proposed to maximize effective network throughput. The resulting optimization problem requires exact knowledge of network topology,which may not be available in practice. Therefore, two standard compliant approximation algorithms are developed, which relyon underestimation and overestimation of interference. The first one aims to maximize the reuse of available spectrum, whereas the second one is a more conservative approach that schedules together only links that cause no interference. Extensive performance analysis provides useful insights on the directionality level and the number of concurrent transmissions that should bepursued. Interestingly, extremely narrow beams are in general not optimal.
Place, publisher, year, edition, pages
IEEE conference proceedings, 2015. Vol. 2015, 1292-1297 p.
, IEEE International Conference on Communications, ISSN 1550-3607 ; 2015
Directional communications, millimeter wave networks, concurrent transmissions, spectral efficiency
Communication Systems Computer Systems Telecommunications
IdentifiersURN: urn:nbn:se:kth:diva-164072DOI: 10.1109/ICC.2015.7248501ISI: 000371708101082ScopusID: 2-s2.0-84953709497ISBN: 978-1-4673-6432-4OAI: oai:DiVA.org:kth-164072DiVA: diva2:803089
IEEE International Conference on Communications, ICC 2015, London, United Kingdom, 8 June 2015 through 12 June 2015
QC20151015, QC 201604212015-04-132015-04-132016-04-21Bibliographically approved