저전력 무선통신 시스템에서 사용자 다중화가 지연 QoS 성능에 미치는 영향 분석

Effect Analysis of User-Multiplexing on Delay QoS Performance in Low-Power Wireless Communication Systems

  • 안성우 (연세대학교 전기전자공학부) ;
  • 홍대식 (연세대학교 전기전자공학부)
  • Ahn, Seong-Woo (Dept. of Electrical and Electronic Engin., Yonsei University) ;
  • Hong, Dae-Sik (Dept. of Electrical and Electronic Engin., Yonsei University)
  • 투고 : 2011.01.06
  • 심사 : 2011.04.14
  • 발행 : 2011.04.25

초록

본 논문은 지연 QoS (delay Quality of Service)에 대한 제약이 주어졌을 때의 시스템 용량을 정량화 할 수 있는 분석모델을 제시하고, 이를 바탕으로 다중사용자 저전력 무선통신 시스템에서 사용자 다중화가 지연 QoS에 미치는 영향을 분석하였다. 이를 위해, 한 프레임에서 스케줄 되는 사용자 수를 다중화도 (degree of multiplexing)이라 정의하고, 다중화도가 지연 서비스 품질과 시스템 용량 간의 관계에 미치는 영향을 분석하였다. 또한, 저전력 통신환경에서 에너지 효율성을 고려할 때 최적의 다중화도가 어떻게 변화하는지를 확인하였다. 마지막으로 모의실험을 통하여, 최적의 다중화도를 이용할 때 상당한 성능이득을 얻을 수 있음을 확인하였다.

In this paper, we present the analytic model to quantify the system capacity with delay Quality of Service (QoS) constraints, and analyze the effect of user-multiplexing on the delay QoS performance in multiuser low-power wireless communication systems. For this purpose, we define the degree of multiplexing as the number of scheduled users to be served in a frame, and investigate the effect of degree of multiplexing (DoM) on the trade-off of throughput and delay QoS constraints. Through this analysis, we characterize the optimal DoM maximizing the energy efficiency in low-power communication environments. Finally, through the simulation results, we verify that our approach with its optimal DoM yields substantial capacity gain.

키워드

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