Latency-Aware Highly-Reliable mmWave Systems via Multi-Point Connectivity

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 using coordinated multi-point (CoMP) transmission for delay bounded reliable mmWave communication. We propose novel blockage-aware algorithm sum-power minimization problem under user-specific latency requirements dynamic mobile access network. use Lyapunov optimization framework, provide control algorithm, which efficiently transforms time-average stochastic into sequence deterministic subproblems. A robust beamformer design then proposed by exploiting queue backlogs information, that allocates required cooperation resources, proactively leverages multi-antenna spatial diversity according instantaneous needs users. Further, adapt uncertainties channel, consider pessimistic estimate rates over link combinations an adaptive selection CoMP serving set from available remote units (RRUs). Moreover, after relaxation coupled non-convex constraints via Fractional Program (FP) techniques, low-complexity closed-form iterative provided solving system Karush-Kuhn-Tucker (KKT) optimality conditions. simulation results manifest that, presence random blockages, methods outperform baseline scenarios power-efficient, high-reliable,