Latency-Constrained Highly-Reliable mmWave Communication via Multi-point Connectivity.
arXiv (Cornell University)(2021)
摘要
The sensitivity of millimeter-wave (mmWave) radio channel to blockage is a
fundamental challenge in achieving low-latency and ultra-reliable connectivity.
In this paper, we explore the viability of using coordinated multi-point (CoMP)
transmission for a delay bounded and reliable mmWave communication. We propose
a novel blockage-aware algorithm for the sum-power minimization problem under
the user-specific latency requirements in a dynamic mobile access network. We
use the Lyapunov optimization framework, and provide a dynamic control
algorithm, which efficiently transforms a time-average stochastic problem into
a sequence of deterministic subproblems. A robust beamformer design is then
proposed by exploiting the queue backlogs and channel information, that
efficiently allocates the required radio and cooperation resources, and
proactively leverages the multi-antenna spatial diversity according to the
instantaneous needs of the users. Further, to adapt to the uncertainties of the
mmWave channel, we consider a pessimistic estimate of the rates over link
blockage combinations and an adaptive selection of the CoMP serving set from
the available remote radio units (RRUs). Moreover, after the relaxation of
coupled and non-convex constraints via the Fractional Program (FP) techniques,
a low-complexity closed-form iterative algorithm is provided by solving a
system of Karush-Kuhn-Tucker (KKT) optimality conditions. The simulation
results manifest that, in the presence of random blockages, the proposed
methods outperform the baseline scenarios and provide power-efficient,
high-reliable, and low-latency mmWave communication.
更多查看译文
关键词
latency-constrained,highly-reliable,multi-point
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要