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Providing Telemedicine Service In An Infrastructure-based Cognitive Radio Network

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  1. Providing Telemedicine Service In An Infrastructure-based Cognitive Radio Network Presented by Seoungyoul Oh

  2. Reference • Providing Telemedicine Service In An Infrastructure-based Cognitive Radio Network • IEEE Wireless Communications, February 2010 • Shan Feng, Zhongliang Liang, and Dongmei Zhao • McMaster Univ.

  3. Introduction • Telemedicine system • Remote patient monitoring system • Blood pressure, glucose, electrocardiography … • Existing solution – Body area network (BAN) • IEEE 802.15.4-based • Data rate & Comm range are limited

  4. System model CBS • Upload infrastructure model • Cognitive base station (CBS) • Multiple radio • H-station • Types of traffic • Urgent traffic • Monitoring traffic • Assumption • Only CBS performs sensing • Data (H-station) – Ack (CBS) • If an ACK is not received, H-station considers the current channel is occupied by the PU H-station H-station H-station

  5. Proposed telemedicine system- Initial phase • Assumption • N channels, K radios at the CBS • At most N/K times sensing • Step1) CBS stops sensing if • Found k available channel • Or all N channels have been sensed • Step2) The radios switch to available channels • Step3) Mapping procedure

  6. Proposed telemedicine system • Periodic sensing • At CBS • Beacon msg • Time sync • Inform the available channel to H-station

  7. Proposed telemedicine system Superframe 1 Superframe 2 CH available CH available Time MD1 MD2 MD3 UD MD3 MD4 MD5 MD6 S B S B S B Tr Tr Tu S MD : Sensing : Monitoring data B : Beacon UD : Urgent data