Abstract
In this paper, we propose interference avoidance resource allocation scheme based on graph-coloring algorithm to introduce performance gain using spatial reuse in D2D (Device-to-Device) system. By assigning multiple D2D pairs to a single D2D resource, interference from neighboring D2D pairs is inevitable, which leads to performance degradation. Therefore, we first introduce the feedback information and the method considering the amount of information that can be practically provided by a D2D pair. Then, we propose how to construct a graph, which is corresponding to the D2D system, using the feedback information and adopt a graph-coloring algorithm to efficiently avoid interference. Simulation results show that the proposed resource allocation scheme outperforms traditional resource allocation schemes in both overall sum rate and spectral efficiency of D2D system while reducing the outage probability. Moreover, the outage probability, which indicates a failure rate of D2D communication, can be reduced by adopting the proposed scheme. 논문 14-39A-12-05 The Journal of Korean Institute of Communications and Information Sciences '14-12 Vol.39A No.12 http://dx.doi.org/10.7840/kics.2014.39A.12.729 729 ※ 본 연구는 미래창조과학부 및 정보통신기술진흥센터의 정보통신·방송 연구개발 사업의 일환으로 수행하였음.[14-000-04-001, 초연결 스마트 모바일 서비스를 위한 5G 이동통신 핵심기술 개발] ° First and and Corresponding Author : Wired & Wireless Access Research Department, Electronics and Telecommunications Research Institute (ETRI), ch.lee88@etri.re.kr, 정회원 * Wired & Wireless Access Research Department, ETRI, smoh@etri.re.kr, aspark@etri.re.kr, 정회원 논문번호:KICS2014-08-329, Received August 28, 2014; Revised October 28, 2014; Accepted November 24, 2014 The Journal of Korean Institute of Communications and Information Sciences '14-12 Vol.39A No.12
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