2018/09/25 by Christian Vitale, Vincenzo Sciancalepore, Vitale, Christian +3
Computer Science · Engineering · #Cooperative Communication and Network Coding #Advanced MIMO Systems Optimization #Wireless Networks and Protocols
paper · pdf · doi:10.48550/arxiv.1809.09524
Time-domain Inter-Cell Interference Coordination (ICIC) is recognized as the\nmain driver towards efficient and effective ultra-dense network deployments.\nAlmost Blank Subframe (ABS), as key-example of ICIC, has been recently\nstandardized so as to achieve high spectral efficiency. As we show in this\narticle, adopting ABS implies non-trivial complexity to be effective in\nmulticellular environments with heterogeneous cell coverage and user density.\nNonetheless, no fairness determinism is guaranteed by ICIC and ABS in\nparticular. Instead, we analytically show that a compound exploitation of ABS\nwith outband sidelinks used for Device-to-Device (D2D) communications on\nunlicensed bands not only allows to abate the complexity of operating ABS, but\nalso results in unexpectedly high levels of fairness. Based on the analysis, we\nformulate a convex optimization problem to stochastically make ABS decisions\nwhile providing proportional fairness guarantees. Our results prove that,\ncompared to a legacy system, stochastically orchestration of ABS largely boosts\nfairness while retaining a notable throughput gain offered by mmWave outband\nsidelinks used for relay.\n