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Analyzing Effects of Directional Deafness on mmWave Channel Access in Unlicensed Bands

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Original languageEnglish
Title of host publication2017 IEEE Globecom Workshops, GC Wkshps 2017 - Proceedings
Number of pages7
ISBN (Electronic)9781538639207
Publication statusPublished - 24 Jan 2018
Publication typeA4 Article in a conference publication
Event IEEE Global Telecommunications Conference - Singapore, Singapore
Duration: 4 Dec 20178 Dec 2017


Conference IEEE Global Telecommunications Conference


Directional deafness problem is one of the most important challenges in beamforming-based channel access at mmWave frequencies, which is believed to have detrimental effects on system performance in form of excessive delays and significant packet drops. In this paper, we contribute a quantitative analysis of deafness in directional random access systems operating in unlicensed bands by relying on stochastic geometry formulations. We derive a general numerical approach that captures the behavior of deafness probability as well as provide a closed-form solution for a typical sector-shaped antenna model, which is then may be extended to a more realistic two-sector pattern. Finally, employing contemporary IEEE 802.11ad modeling numerology, we illustrate our analysis revealing the importance of deafness-related considerations and their system- level impact.

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