Journal of Korea Multimedia Society (한국멀티미디어학회논문지)

Korea Multimedia Society (한국멀티미디어학회)
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Performance Evaluation of Distributed Cooperative MAC Protocol Algorithm for Enhancing Multimedia QoS of WiMedia Communication Network

와이미디어 통신네트워크의 멀티미디어 QoS 개선을 위한 분산협력방식 MAC 프로토콜 성능분석

  • 김진우 (목포대학교 정보산업연구소(대학중점연구소)) ;
  • 이연우 (목포대학교 정보통신공학과) ;
  • 이성로 (목포대학교 정보전자공학과)
  • Received : 2012.01.02
  • Accepted : 2012.01.28
  • Published : 2012.04.30
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Abstract

In this paper, an efficient technique for enhancing the QoS of multimedia service for an WiMedia network applying distributed cooperative medium access (D-MAC) protocol is proposed. D-MAC protocol has been proposed to support high-rate Wireless Personal Area Networks (HR-WPANs) by the WiMedia Alliance. Unlike the centralized IEEE 802.15.3 MAC, the D-MAC UWB specified by WiMedia supports all devices to be self-organized and removes the SOP (Simultaneous Operating Piconet) problem, i.e., packet collisions between overlapped piconets in the centralized IEEE 802.15.3 MAC. However the WiMedia D-MAC can't prevent reduce the throughput degradation occurred by mobile nodes with low data rate. Therefore, a distributed cooperative MAC protocol for multi-hop UWB network is proposed in this paper. The proposed technique can intelligently select the transmission path with higher data rate to provide real-time multimedia services with minimum delay, thus enhances QoS of multimedia service.

본 논문에서는 와이미디어(WiMedia) 통신네트워크용 분산협력적 매체접근제어 프로토콜(D-MAC)의 멀티미디어 서비스 QoS를 개선하기 기법을 제안하였다. D-MAC방식은 고속 WPAN시스템에 적용하기 위한 것으로 기존에 제안된 중앙집중적 방식인 IEEE 802.15.3 프로토콜과 달리 모든 디바이스 장치들이 자원을 분산적 예약이 가능하게 하는 방식이다. 본 논문에서는 기존의 WiMedia 프로토콜에서는 채널의 링크 상태 변화를 적절하게 대처하지 못하여 발생하는 멀티미디어 QoS 감소문제를 해결하는 분산협력방식 DMAC 프로토콜 기법을 제안하여 성능을 분석하였다.

Keywords

References

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