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Ubiquitous Healthcare Using MAC Protocols in Wireless Body Area Sensor Networks (WBASNs) PowerPoint Presentation
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Ubiquitous Healthcare Using MAC Protocols in Wireless Body Area Sensor Networks (WBASNs)
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  1. Ubiquitous Healthcare Using MAC Protocols in Wireless Body Area Sensor Networks (WBASNs)

  2. Group Members • Muhammad Sarim Hayat FA08-BET-131 • Nadir Ali Khan FA08-BET-089 • Umair Rafiq FA08-BET-132

  3. OUTLINE • Abstract • Introduction • Summary of Architectures of WBANs • Energy Efficient MAC Protocols • MAC Frame structure • Path Loss in WBAN • Conclusion

  4. OUTLINE • Abstract • Introduction • Summary of Architectures of WBANs • Energy Efficient MAC Protocols • MAC Frame structure • Path Loss in WBAN • Conclusion

  5. Abstract(1/2) • Wireless Body Area Sensor Networks (WBASNs) • Ubiquitous Healthcare (UHC) • Survey of different architectures of WBANs • Functionality of devices used in architectures • Survey of different MAC protocols used in WBASNs • Advantages and disadvantages is discussed • Trade-offs • Mechanisms used by different protocols • Analyses of different MAC protocols with respect to different architectures used in UHC

  6. Abstract(2/2) • Path loss in WBAN • In-body Communication • With respect to MAC Protocols • With respect to WBAN models • On-body Communication • With respect to MAC Protocols • With respect to distance, amplitude and RMS delay • Off-body communication • With respect to MAC Protocols

  7. OUTLINE • Abstract • Introduction • Summary of Architectures of WBANs • Energy Efficient MAC Protocols • MAC Frame structure • Path Loss in WBAN • Conclusion

  8. Introduction (1/3) • WBASNs • Emerging domain of wireless communication • A lot of advancement in this domain • Consists of tiny sensors • UHC • Provided to patients all around the globe, especially to elderly peoples • Different architectures are discussed • Each architecture has its own applications depending upon the communication scenarios

  9. Introduction (2/3) • Energy Efficiency of the system • One of the basic requirement for WBASNs because of limited power of batteries • Life time of a node depends upon: • Energy consumption during communication • Energy wastage during communication • Packet collision • Overhearing • Idle listening • Over emitting • Control overhead

  10. Introduction (3/3) • Path loss • Data is transferred through wireless medium so path loss is probable to occur • Path loss is different for different scenarios and it depends upon: • Frequency of operations • Distance between transmitter and receiver nodes (d)

  11. Most Frequently Used Standards for WBAN Communication • IEEE 802.15.1 Bluetooth • ZigBee • Medical Implant Communications Service (MICS) • IEEE 802.15.6 Ultra Wide Band (UWB)

  12. Wearable Sensors used for Ubiquitous HealthCare • Wrist watch (eWatch) • Oximeter • Chest belt • Wearable shirt type (smart shirt/life shirt)

  13. General WBAN Architecture

  14. General WBAN Architecture

  15. General WBAN Architecture

  16. General WBAN Architecture

  17. OUTLINE • Abstract • Introduction • Summary of Architectures of WBANs • Energy Efficient MAC Protocols • MAC Frame structure • Path Loss in WBAN • Conclusion

  18. OUTLINE • Abstract • Introduction • Summary of Architectures of WBANs • Energy Efficient MAC Protocols • MAC Frame structure • Path Loss in WBAN • Conclusion

  19. Energy Efficient MAC Protocols • MAC Layer is the most suitable layer for discussing energy and power issues • Collision avoidance for energy efficiency, minimum latency, high throughput, and communication reliability, are basic requirements in the design of MAC protocol. • There are several sources of energy wastage:

  20. Energy minimization techniques in MAC Protocols for WBANs (1/2) • There are three main approaches adopted for the energy saving mechanisms in MAC protocols for WBANs, which are listed and discussed below: • Low Power Listening (LPL) • Node awakes for a very short period to check activity of channel • If the channel is not idle then the node remains in active state to receive data and other nodes go back to sleeping mode. • LPL is sensitive to traffic rates

  21. Energy minimization techniques in MAC Protocols for WBANs (2/2) • Scheduled Contention • Combination of the scheduling and contention based mechanisms • In Contention based protocols, contending nodes try to access the channel for data transmission • Scheduling or Contention free means that each node has the schedule of transmission in the form of bandwidth or time slot. • Time Division Multiple Access (TDMA) • Time slots are allocated to the sensor nodes by a master node (MN). • This scheme is highly sensitive to clock drift • The scheme is power efficient because a node gets time slot for transmission of data and remains in sleep mode for rest of the time

  22. Advantages and disadvantages of MAC Protocols

  23. Advantages and disadvantages of MAC Protocols

  24. Advantages and disadvantages of MAC Protocols

  25. Advantages and disadvantages of MAC Protocols

  26. Advantages and disadvantages of MAC Protocols

  27. Advantages and disadvantages of MAC Protocols

  28. Advantages and disadvantages of MAC Protocols

  29. Advantages and disadvantages of MAC Protocols

  30. Advantages and disadvantages of MAC Protocols

  31. Energy minimization mechanism in MAC protocols

  32. Energy minimization mechanism in MAC protocols