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The Study of Body Access Network ボディアクセス網に関する研究

The Study of Body Access Network ボディアクセス網に関する研究. BAN. PAN. Cellular Network. WLAN. Satellite Network. Background. User-center mobile world: Personal area domain: BAN Immediate area domain: PAN, WLAN Up to several tens of meters Wide area domain: Cellular and satellite networks

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The Study of Body Access Network ボディアクセス網に関する研究

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  1. The Study of Body Access Networkボディアクセス網に関する研究

  2. BAN PAN Cellular Network WLAN Satellite Network Background • User-center mobile world: • Personal area domain: • BAN • Immediate area domain: • PAN, WLAN • Up to several tens of meters • Wide area domain: • Cellular and satellite networks • Global coverage BAN: Body Area Network PAN: Personal Area Network

  3. Introduction to Intra-body Communications • What is intra-body communication (IBC)? • Short-range communication between devices in which the human body is used as the signal transmission medium • Near-field communication solution for BANs • Methods for intra-body transmissions: • Electric field type • Electromagnetic type • IBC classification: • Body-environment communication • Body-body communication: • Intra-body • Inter-body

  4. Security door E-wallet Exchange personal information Potential IBC Applications • New e-wallet system • Transfer of information between all type of devices • Patient medical record access in medical emergencies • Applications for blind people: • Orientation (walking in streets, train terminals) • Location-based information • E-payment (buying products, access station ticket gate) • Personal identification (open doors)

  5. Elements and Features IBC System Model (1) • Central unit or master device (CU) • Intelligent hub for user’s BAN • Manage and control all the active IBC enabled devices • Store information about: • user’s personal data • properties of active BAN devices • Detection of potential establishment of IBC between BAN devices • Transfer the data to the most suitable terminal CU Intra-body communications (IBC) Out-body communications

  6. New Dynamic Personalized Advertising System by Using IBC in Trains • Advertising device above handle with a small system-on-a-chip integrated: • Store several types of data with commercials addressed to different social groups • When passenger touches the handle, personalized information could be sent • Wristwatch: • Central unit • Store information about user’s interests and preferences • Decide whether user wants to receive information from the handle • Depending on the type of BAN devices available, resend the most suitable type of data to the most suitable device • Data + identification code of selected BAN device transmitted so that only the selected device could receive the information correctly Advertising device Handle IBC enabled wristwatch IBC enabled mobile phone

  7. Top view 0 20cm 55cm 10cmx5cm, GND 5cmx5cm, NGND Rx 10cmx5cm,NGND 5cmx5cm,GND Side view Tx Experiment Setup (2) • TX and RX design model: • Signal electrode: round copper plate • Ground (GND): • Circuit board as the GND plate • Round copper electrode touching the body (some configurations) • Height between signal electrode and GND plate: 1.2cm • Several combinations of TX and RX in order to decide the optimal configuration: • GND circuit board plate size • Signal electrode size • With or without GND electrode touching the arm • Height between signal electrode and GND plate

  8. Frequency Domain Response Configuration 7 • Long distance causes more path loss, especially in high frequency band • Suitable frequency band between 200MHz~500MHz

  9. Time Domain Response Air Propagation Intra-body Propagation Distance = 20cm Distance = 55cm The power of strongest echo of body channel is nearly 22-25dB higher than air channel  confirmation of intra-body communication when TX&RX touching skin In intra-body propagation, there is some periodicity between the first three echoes with a time difference of approximately 5ns between echoes

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