Mobility and Blockage-aware Communications in Millimeter-Wave Vehicular Networks

02/25/2020
by   Muddassar Hussain, et al.
0

Mobility may degrade the performance of next-generation vehicular networks operating at the millimeter-wave spectrum: frequent loss of alignment and blockages require repeated beam training and handover, thus incurring huge overhead. In this paper, an adaptive and joint design of beam training, data transmission and handover is proposed, that exploits the mobility process of mobile users (MUs) and the dynamics of blockages to optimally trade-off throughput and power consumption. At each time slot, the serving base station decides to perform either beam training, data communication, or handover when blockage is detected. The decision problem is cast as a partially observable Markov decision process, and the goal is to maximize the throughput delivered to the MU, subject to an average power constraint. To address the high dimensionality of the problem, an approximate dynamic programming algorithm based on a variant of PERSEUS [1] is developed, where both the primal and dual functions are simultaneously optimized to meet the power constraint. Numerical results show that the PERSEUS-based policy has near-optimal performance, and achieves a 55 periodic beam training. Motivated by the structure of the PERSEUS-based policy, two heuristic policies with lower computational cost are proposed. These are shown to achieve a performance comparable to that of PERSEUS, with just a 10 loss in spectral efficiency.

READ FULL TEXT
research
03/01/2020

Adaptive Millimeter-Wave Communications Exploiting Mobility and Blockage Dynamics

Mobility may degrade the performance of next-generation vehicular networ...
research
04/26/2018

Beam Training and Data Transmission Optimization in Millimeter-Wave Vehicular Networks

Future vehicular communication networks call for new solutions to suppor...
research
01/28/2018

Optimal Beam Sweeping and Communication in Mobile Millimeter-Wave Networks

Millimeter-wave (mm-wave) communications incur a high beam alignment cos...
research
05/16/2018

Energy-Efficient Interactive Beam-Alignment for Millimeter-Wave Networks

Millimeter-wave (mm-wave) will be the key enabling technology in the nex...
research
05/02/2020

Optimal Beam Association for High Mobility mmWave Vehicular Networks: Lightweight Parallel Reinforcement Learning Approach

In intelligent transportation systems (ITS), vehicles are expected to fe...
research
05/23/2018

MmWave Beam Prediction with Situational Awareness: A Machine Learning Approach

Millimeter-wave communication is a challenge in the highly mobile vehicu...
research
06/10/2021

Fastening the Initial Access in 5G NR Sidelink for 6G V2X Networks

The ever-increasing demand for intelligent, automated, and connected mob...

Please sign up or login with your details

Forgot password? Click here to reset