Journal
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
Volume 21, Issue 4, Pages 2352-2367Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TWC.2021.3111707
Keywords
IEEE 802; 11 Standard; Wireless communication; Array signal processing; Uplink; NOMA; Interference; Power control; NR-U and WiGig coexistence; mmWave MIMO-NOMA; user grouping; beam coordination
Funding
- National Natural Science Foundation Program of China [61801333]
- Young Elite Scientists Sponsorship Program by CAST 2019
- Natural Science Foundation General Program of Hubei Province [2020CFB633]
- National Natural Science Foundation of China Enterprise Innovation Development Key Project [U19B2004]
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This paper introduces a coexistence network for mmWave and WiGig based on MIMO-NOMA, with a joint user grouping, hybrid beam coordination, and power control strategy to maximize spectral efficiency. The proposed strategy guarantees the strict NR-U delay requirement and the real-time WiGig transmission performance.
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 in future wireless networks. However, the development of NR-U networks should consider the coexistence with the incumbent Wireless Gigabit (WiGig) networks. In this paper, we introduce a novel multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) based mmWave NR-U and WiGig coexistence network for uplink transmission. Our aim for the proposed coexistence network is to maximize the spectral efficiency while ensuring the strict NR-U delay requirement and the WiGig transmission performance in real time environments. A joint user grouping, hybrid beam coordination and power control strategy is proposed, which is formulated as a Lyapunov optimization based mixed-integer nonlinear programming (MINLP) with unit-modulus and nonconvex coupling constraints. Hence, we introduce a penalty dual decomposition (PDD) framework, which first transfers the formulated MINLP into a tractable augmented Lagrangian (AL) problem. Thereafter, we integrate both convex-concave procedure (CCCP) and inexact block coordinate update (BCU) methods to approximately decompose the AL problem into multiple nested convex subproblems, which can be iteratively solved under the PDD framework. Numerical results illustrate the performance improvement ability of the proposed strategy, as well as demonstrating the effectiveness to guarantee the NR-U traffic delay and WiGig network performance.
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