상세정보
학술대회
Interference Analysis and Subchannel Allocation Schemes in Tri-Sectored OFDMA Systems
- 발행일
- 200709
- 출처
- Vehicular Technology Conference (VTC) 2007 (Fall), pp.1857-1861
- 협약과제
- 07MM1100, 3G Evolution 무선전송 기술 개발, 방승찬
- 초록
- This paper analyzes the interference aspects of tri-sectored OFDMA systems and evaluates the performance of some subchannel allocation schemes to mitigate inter-sector interference. To maximize spectral efficiency, it is preferred to adopt frequency reuse of 1. But, carrier to interference and noise ratio (CINR) values at the boundary of sectors are extremely deteriorated. Two subchannel allocation methods are compared and evaluated in this environment. One is to maximize disparity, which is to maximize the number of subchannels in good CINR values, and the other is to minimize disparity, which is to maximize the number of subchannels in moderate CINR values. These schemes are compared under proportionally fair scheduling algorithm. Simulation results regarding to throughput show that the schemes outperform random allocation schemes in 802.16 based systems. © 2007 IEEE.
- KSP 제안 키워드
- Fair Scheduling, Interference Analysis, Interference and noise, OFDMA systems, Random Allocation, Scheduling algorithm, Spectral efficiency(SE), Sub-channel allocation, based system, frequency reuse, proportionally fair