Fast millimeter wave beam alignment

Haitham Hassanieh, Mohammed Abdelghany, Omid Abari, Dina Katabi, Michael Rodriguez, Piotr Indyk

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

There is much interest in integrating millimeter wave radios (mmWave) into wireless LANs and 5G cellular networks to benefit from their multi-GHz of available spectrum. Yet, unlike existing technologies, e.g., WiFi, mmWave radios require highly directional antennas. Since the antennas have pencil-beams, the transmitter and receiver need to align their beams before they can communicate. Existing systems scan the space to find the best alignment. Such a process has been shown to introduce up to seconds of delay, and is unsuitable for wireless networks where an access point has to quickly switch between users and accommodate mobile clients. This paper presents Agile-Link, a new protocol that can find the best mmWave beam alignment without scanning the space. Given all possible directions for setting the antenna beam, Agile-Link provably finds the optimal direction in logarithmic number of measurements. Further, Agile-Link works within the existing 802.11ad standard for mmWave LAN, and can support both clients and access points. We have implemented Agile-Link in a mmWave radio and evaluated it empirically. Our results show that it reduces beam alignment delay by orders of magnitude. In particular, for highly directional mmWave devices operating under 802.11ad, the delay drops from over a second to 2.5 ms.

Original languageEnglish (US)
Title of host publicationSIGCOMM 2018 - Proceedings of the 2018 Conference of the ACM Special Interest Group on Data Communication
PublisherAssociation for Computing Machinery, Inc
Pages432-445
Number of pages14
ISBN (Electronic)9781450355674
DOIs
StatePublished - Aug 7 2018
Externally publishedYes
Event2018 Conference of the ACM Special Interest Group on Data Communication, ACM SIGCOMM 2018 - Budapest, Hungary
Duration: Aug 20 2018Aug 25 2018

Publication series

NameSIGCOMM 2018 - Proceedings of the 2018 Conference of the ACM Special Interest Group on Data Communication

Other

Other2018 Conference of the ACM Special Interest Group on Data Communication, ACM SIGCOMM 2018
CountryHungary
CityBudapest
Period8/20/188/25/18

Keywords

  • 5G
  • Beam Alignment
  • Millimeter Wave
  • Sparse Recovery

ASJC Scopus subject areas

  • Communication
  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Signal Processing

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