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  • Cleveland State university

    Electrical and Computer Engineering

    Architecture and Implementation of Biosensors

    For Health Monitoring

    Abou-Bakar M. Fofana

    Abou.m.fofana@gmail.com

  • Architecture and Implementation of Biosensors

    For Health Monitoring

    1. Biosensors

    2. Topology of a Wireless Body Sensors Area Networks

    3. Architecture of a Wireless Body Sensors Area Networks

    4. Wireless Communication Technology for Body Area Networks (BAN)

    5. Power Consumption and Energy Scavenging

    6. Security in the Body Area Network

    7. Conclusion

  • Architecture and Implementation of Biosensors for Health Monitoring

    1. Biosensors

    2. Topology of a Wireless Body Sensors Area

    Networks

    3. Architecture of a Wireless Body Sensors

    Area Networks

    4. Wireless Communication Technology for

    Body Area Networks (BAN)

    5. Power Consumption and Energy

    Scavenging

    6. Security in the Body Area Network

    7. Conclusion

    Bio-: refers to biology

    Sensors: small scale device

    In the family of microsystem

    Low power consumption

    Used in many applications

    Implantable and wearable

    Figure1: Diagram of a sensor

  • Architecture and Implementation of Biosensors for Health Monitoring

    1. Biosensors

    2. Topology of a Wireless Body Sensors

    Area Networks

    3. Architecture of a Wireless Body Sensors

    Area Networks

    4. Wireless Communication Technology for

    Body Area Networks (BAN)

    5. Power Consumption and Energy

    Scavenging

    6. Security in the Body Area Network

    7. Conclusion

    Star networks

    Mesh networks

    Star-mesh hybrid networks

    Cluster tree networks

  • Architecture and Implementation of Biosensors for Health Monitoring

    1. Biosensors

    2. Topology of a Wireless Body Sensors Area

    Networks

    3. Architecture of a Wireless Body Sensors

    Area Networks

    4. Wireless Communication Technology for

    Body Area Networks (BAN)

    5. Power Consumption and Energy

    Scavenging

    6. Security in the Body Area Network

    7. Conclusion

    Figure 2: Architecture of a Body Area Network

  • Architecture and Implementation of Biosensors for Health Monitoring

    1. Biosensors

    2. Topology of a Wireless Body Sensors Area

    Networks

    3. Architecture of a Wireless Body Sensors

    Area Networks

    4. Wireless Communication Technology for

    Body Area Networks (BAN)

    5. Power Consumption and Energy

    Scavenging

    6. Security in the Body Area Network

    7. Conclusion

    Bluetooth standard IEEE 802.15.1

    Operate in the range 2400-2483.5 MHz Data rate 1-3Mbit/s RF range 10m Security 128 bit AES Architecture point to point Power consumption 100mw class1

    ZigBee 802.15.4

    Frequency band 2.4GHz Data rate 250Kbit/s Communication range >50m Security 128 bit AES Mesh, Multiple star 60mW

  • Architecture and Implementation of Biosensors for Health Monitoring

    1. Biosensors

    2. Topology of a Wireless Body Sensors Area

    Networks

    3. Architecture of a Wireless Body Sensors

    Area Networks

    4. Wireless Communication Technology for

    Body Area Networks (BAN)

    5. Power Consumption and Energy

    Scavenging

    6. Security in the Body Area Network

    7. Conclusion

    UWB Ultra Wide Band

    Initially under standard P802.15.3a Real time location system High data rate: video streaming, wireless

    monitoring. From 100-500Mbit/s

    Low power transceivers: suitable for hospitals Approximately 2mW/Mbps

    Wi-Fi 802.11 WLAN

    High rate Power consumption higher Battery lifetime reduced Not suitable for BSN

    Standard 802.15.6

    Support many PHY layers-NB, UWB, HBC Use industrial scientific medical band Increase battery life Provide strong security

  • Architecture and Implementation of Biosensors for Health Monitoring

    1. Biosensors

    2. Topology of a Wireless Body Sensors Area

    Networks

    3. Architecture of a Wireless Body Sensors

    Area Networks

    4. Wireless Communication Technology for

    Body Area Networks (BAN)

    5. Power Consumption and Energy

    Scavenging

    6. Security in the Body Area Network

    7. Conclusion

    Primary design challenges

    Hardware: design new PHY layers, efficient architecture

    Software: manage activity and inactivity of nodes through special algorithms

    Energy Scavenging

    Need to wirelessly powered the sensors Through energy sources

    o Motion and vibration

    o Air flow, temperature

    o Solar cells, ambient electromagnetic

    Alternatives Explore battery technology

    Lithium energy 1400-3600J/cc Fuel cells, very high energy 638kJ/mol for

    methanol

  • Architecture and Implementation of Biosensors for Health Monitoring

    1. Biosensors

    2. Topology of a Wireless Body Sensors Area

    Networks

    3. Architecture of a Wireless Body Sensors

    Area Networks

    4. Wireless Communication Technology for

    Body Area Networks (BAN)

    5. Power Consumption and Energy

    Scavenging

    6. Security in the Body Area Network

    7. Conclusion

    Virus in BSNs view

    Compromised Nodes Attacks in the BSN

    o Buffer overflow attack, exhaustion of the

    battery, selective forwarding attack

    o Collision, jamming attacks, Trojan

    Horse Solution

    Choose the most efficient topology Star is suitable for the body sensor

    networks

    Peer-to-peer implies mesh-based topology

    o Ensure a good routing mechanism

    o Provide a well defined slave/master

    role between nodes

    Cryptographic approach

  • Architecture and Implementation of Biosensors for Health Monitoring

    1. Biosensors

    2. Topology of a Wireless Body Sensors Area

    Networks

    3. Architecture of a Wireless Body Sensors

    Area Networks

    4. Wireless Communication Technology for

    Body Area Networks (BAN)

    5. Power Consumption and Energy

    Scavenging

    6. Security in the Body Area Network

    7. Conclusion

    Cryptographic approach

    o Using block ciphers : For example the cipher

    block chaining technique is the most secure

    Figure 3: Cipher block chaining mode

  • Architecture and Implementation of Biosensors for Health Monitoring

    1. Biosensors

    2. Topology of a Wireless Body Sensors Area

    Networks

    3. Architecture of a Wireless Body Sensors

    Area Networks

    4. Wireless Communication Technology for

    Body Area Networks (BAN)

    5. Power Consumption and Energy

    Scavenging

    6. Security in the Body Area Network

    7. Conclusion

    Cryptographic approach

    o Through secure protocols:

    Secure Networks Encryption Protocol (SNEP)

    and TESLA

    Figure 4: SNEP, encryption and decryption with

    counter mode

  • Architecture and Implementation of Biosensors for Health Monitoring

    1. Biosensors

    2. Topology of a Wireless Body Sensors Area

    Networks

    3. Architecture of a Wireless Body Sensors

    Area Networks

    4. Wireless Communication Technology for

    Body Area Networks (BAN)

    5. Power Consumption and Energy

    Scavenging

    6. Security in the Body Area Network

    7. Conclusion

    In this presentation, we presented multiple

    topologies relative to the BSN and also exposed

    the constraint in term of hardware and software

    design to provide high level security and reliable

    transfer of data. We have shown that the body

    sensor networks could successfully be implemented

    for monitoring purposes in the health system using

    adequate topology and security measurement.

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