On the relay-fallback tradeoff in millimeter wave wireless systems
2016 (English)Conference paper (Refereed)
Millimeter wave (mmWave) communications systemsare promising candidate to support extremely high data rateservices in future wireless networks. MmWave communicationsexhibit high penetration loss (blockage) and require directionaltransmissions to compensate for severe channel attenuationsand for high noise powers. When blockage occurs, there areat least two simple prominent options: 1) switching to theconventional microwave frequencies (fallback option) and 2)using an alternative non-blocked path (relay option). However,currently it is not clear under which conditions and networkparameters one option is better than the other. To investigatethe performance of the two options, this paper proposes anovel blockage model that allows deriving maximum achievablethroughput and delay performance of both options. A simplecriterion to decide which option should be taken under whichnetwork condition is provided. By a comprehensive performanceanalysis, it is shown that the right option depends on the payloadsize, beam training overhead, and blockage probability. For anetwork with light traffic and low probability of blockage inthe direct link, the fallback option is throughput- and delayoptimal.For a network with heavy traffic demands and semistatictopology (low beam training overhead), the relay option ispreferable.
Place, publisher, year, edition, pages
IEEE Computer Society, 2016.
millimeter wave networks, relay, fallback, blockage, directionality, 5G.
Communication Systems Computer Systems Telecommunications
Research subject Electrical Engineering; Computer Science
IdentifiersURN: urn:nbn:se:kth:diva-182105OAI: oai:DiVA.org:kth-182105DiVA: diva2:903286
IEEE International Conference on Computer Communications (INFOCOM)10-15 April 2016
QC 201604012016-02-152016-02-152016-04-01Bibliographically approved