Millimeter-Wave NR-U and WiGig Coexistence: Joint User Grouping, Beam Coordination, and Power Control

Millimeter wave (mmWave) communication is a promising New Radio in Unlicensed (NR-U) technology to meet with the ever-increasing data rate and connectivity requirements future wireless networks. However, development of NR-U networks should consider coexistence incumbent Wireless Gigabit (WiGig) In this paper, we introduce novel multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) based mmWave WiGig network for uplink transmission. Our aim proposed maximize spectral efficiency while ensuring strict delay requirement transmission performance real time environments. A joint user grouping, hybrid beam coordination power control strategy proposed, which formulated as Lyapunov optimization mixed-integer nonlinear programming (MINLP) unit-modulus nonconvex coupling constraints. Hence, penalty dual decomposition (PDD) framework, first transfers MINLP into tractable augmented Lagrangian (AL) problem. Thereafter, integrate both convex-concave procedure (CCCP) inexact block coordinate update (BCU) methods approximately decompose AL problem nested convex subproblems, can be iteratively solved under PDD framework. Numerical results illustrate improvement ability strategy, well demonstrating effectiveness guarantee traffic performance.