Abstract

웨어러블 컴퓨터 시스템은 WiMedia PHY/MAC 기술과 결합된 USB 기술로 WUSB (wireless universal serial bus) 기술을 사용하여 구성할 수 있다. 본 논문은 U-Health 기능을 지원하는 무선 웨어러블 컴퓨터시스템을 구성하기 위해 WUSB기술과 IEEE 802.15.6 WBAN (wireless body area networks) 기술을 결합한 통신시스템 구조에 초점을 맞추었다. 그리고 IEEE 802.15.6 기반 WUSB 통신 구조에서 저전력 Hibernation 통신 구조를 제안하였다. 제안하는 Hibernation 구조는 WBAN Wakeup Period 및 Wakeup Phase 메시지 필드들을 사용하여, WBAN의 주기적인 Inactive 구간에서 WUSB 통신 구간을 할당한다. 성능 평가에서는 WBAN Wakeup Period에 따른 성능 및 WUSB 통신량에 따른 성능을 비교분석하여, WUSB over IEEE 802.15.6 통신구조에서 제안한 Hibernation 구조의 효율성을 평가하였다. Wearable computer systems can use the wireless universal serial bus (WUSB) that refers to USB technology that is merged with WiMedia PHY/MAC technical specifications. In this paper, we focus on an integrated system of the wireless USB over the IEEE 802.15.6 wireless body area networks (WBAN) for wireless wearable computer systems supporting U-health services. And a communication structure that performs the hibernation for low power consumption is proposed for WUSB over IEEE 802.15.6 hierarchical protocol. In the proposed hibernation mechanisms, WUSB communications are permitted at each m-periodic inactive periods of WBAN superframes by using the WBAN information of Wakeup Period and Wakeup Phase message fields. In our performance evaluations, performances according to amount of WUSB traffic and Wakeup Periods are analyzed respectively to evaluate the effectiveness of proposed hibernation structure in WUSB over IEEE 802.15.6.

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