Initial Beam Association in Millimeter Wave Cellular Systems: Analysis and Design Insights

Ahmed Alkhateeb, Young Han Nam, Md Saifur Rahman, Jianzhong Zhang, Robert W. Heath

Research output: Contribution to journalArticle

34 Citations (Scopus)

Abstract

Enabling the high data rates of millimeter wave (mmWave) cellular systems requires deploying large antenna arrays at both the basestations and mobile users. Prior work on coverage and rate of mmWave cellular networks focused on the case when basestations and mobile beamforming vectors are predesigned for maximum beamforming gains. Designing beamforming/combining vectors, though, requires training, which may impact both the SINR coverage and rate of mmWave systems. This paper evaluates mmWave cellular network performance while accounting for the beam training/association overhead. First, a model for the initial beam association is developed based on beam sweeping and downlink control pilot reuse. To incorporate the impact of beam training, a new metric, called the effective reliable rate, is defined and adopted. Using stochastic geometry, the effective rate of mmWave cellular networks is derived for two special cases: near-orthogonal pilots and full pilot reuse. Analytical and simulation results provide insights into the answers of two important questions. First, what is the impact of beam association on mmWave network performance? Then, should orthogonal or reused pilots be employed? The results show that unless the employed beams are very wide, initial beam training with full pilot reuse is nearly as good as perfect beam alignment.

Original languageEnglish (US)
Article number7880676
Pages (from-to)2807-2821
Number of pages15
JournalIEEE Transactions on Wireless Communications
Volume16
Issue number5
DOIs
StatePublished - May 1 2017
Externally publishedYes

Fingerprint

Millimeter Wave
Cellular Systems
Systems Analysis
Millimeter waves
System Design
Systems analysis
Beamforming
Cellular Networks
Network performance
Reuse
Network Performance
Coverage
Stochastic Geometry
Antenna arrays
Sweeping
Antenna Arrays
Alignment
Geometry
Metric
Training

Keywords

  • beam association
  • initial access
  • Millimeter wave cellular systems
  • stochastic geometry

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

Cite this

Initial Beam Association in Millimeter Wave Cellular Systems : Analysis and Design Insights. / Alkhateeb, Ahmed; Nam, Young Han; Rahman, Md Saifur; Zhang, Jianzhong; Heath, Robert W.

In: IEEE Transactions on Wireless Communications, Vol. 16, No. 5, 7880676, 01.05.2017, p. 2807-2821.

Research output: Contribution to journalArticle

Alkhateeb, Ahmed ; Nam, Young Han ; Rahman, Md Saifur ; Zhang, Jianzhong ; Heath, Robert W. / Initial Beam Association in Millimeter Wave Cellular Systems : Analysis and Design Insights. In: IEEE Transactions on Wireless Communications. 2017 ; Vol. 16, No. 5. pp. 2807-2821.
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