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http://dx.doi.org/10.4218/etrij.17.0116.0035

Spatial Reuse Algorithm Using Interference Graph in Millimeter Wave Beamforming Systems  

Jo, Ohyun (5G Giga Communication Research Laboratory, ETRI)
Yoon, Jungmin (Department of Electrical Engineering and INMC, Seoul National University)
Publication Information
ETRI Journal / v.39, no.2, 2017 , pp. 255-263 More about this Journal
Abstract
This paper proposes a graph-theatrical approach to optimize spatial reuse by adopting a technique that quantizes the channel information into single bit sub-messages. First, we introduce an interference graph to model the network topology. Based on the interference graph, the computational requirements of the algorithm that computes the optimal spatial reuse factor of each user are reduced to quasilinear time complexity, ideal for practical implementation. We perform a resource allocation procedure that can maximize the efficiency of spatial reuse. The proposed spatial reuse scheme provides advantages in beamforming systems, where in the interference with neighbor nodes can be mitigated by using directional beams. Based on results of system level measurements performed to illustrate the physical interference from practical millimeter wave wireless links, we conclude that the potential of the proposed algorithm is both feasible and promising.
Keywords
mmWave; Spatial reuse; Graph coloring; Scheduling; Beamforming; Modem implantation;
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Times Cited By KSCI : 3  (Citation Analysis)
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