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Main Title: Autonomous algorithms for centralized and distributed interference coordination: a virtual layer-based approach
Author(s): Kasparick, Martin
Wunder, Gerhard
Type: Article
Language Code: en
Abstract: Interference mitigation techniques are essential for improving the performance of interference limited wireless networks. In this paper, we introduce novel interference mitigation schemes for wireless cellular networks with space division multiple access (SDMA). The schemes are based on a virtual layer that captures and simplifies the complicated interference situation in the network and that is used for power control. We show how optimization in this virtual layer generates gradually adapting power control settings that lead to autonomous interference minimization. Thereby, the granularity of control ranges from controlling frequency sub-band power via controlling the power on a per-beam basis, to a granularity of only enforcing average power constraints per beam. In conjunction with suitable short-term scheduling, our algorithms gradually steer the network towards a higher utility. We use extensive system-level simulations to compare three distributed algorithms and evaluate their applicability for different user mobility assumptions. In particular, it turns out that larger gains can be achieved by imposing average power constraints and allowing opportunistic scheduling instantaneously, rather than controlling the power in a strict way. Furthermore, we introduce a centralized algorithm, which directly solves the underlying optimization and shows fast convergence, as a performance benchmark for the distributed solutions. Moreover, we investigate the deviation from global optimality by comparing to a branch-and-bound-based solution.
Issue Date: 2014
Date Available: 29-Aug-2017
DDC Class: 620 Ingenieurwissenschaften und zugeordnete Tätigkeiten
004 Datenverarbeitung; Informatik
Subject(s): cellular interference management
distributed algorithms
autonomous inter-cell coordination
power control
network utility maximization
Journal Title: EURASIP Journal on wireless communications and networking
Publisher: Springer
Publisher Place: Heidelberg
Volume: 2014
Issue: 1
Article Number: 120
Publisher DOI: 10.1186/1687-1499-2014-120
EISSN: 1687-1499
Appears in Collections:FG Theoretische Grundlagen der Kommunikationstechnik » Publications

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