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6LoWPAN

6LoWPAN. Extending IP to Low-Power WPAN. By: Shadi Janansefat. CS441 Dr. Kemal Akkaya Fall 2011. Contents:. A review on WSN Introducing 6LoWPAN 6LoWPAN Adaptation Layer 6LoWPAN Stacked Headers Routing in 6LoWPAN Conclusion. What is a WSN?. WSN: Wireless Sensor Network

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6LoWPAN

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  1. 6LoWPAN Extending IP to Low-Power WPAN By: ShadiJanansefat CS441 Dr. Kemal Akkaya Fall 2011

  2. Contents: • A review on WSN • Introducing 6LoWPAN • 6LoWPAN Adaptation Layer • 6LoWPAN Stacked Headers • Routing in 6LoWPAN • Conclusion

  3. What is a WSN? • WSN: Wireless Sensor Network • A network with wireless links formed in an ad-hoc manner • The nodes are collaborative spatially distributed sensors • Usually consists of a large number of nodes • All nodes are used for a common task

  4. Applications of WSNs • Networking unattended sensor nodes have significant impact on the efficiency of many applications: • Military applications such as combat field surveillance • Civil applications such as security and disaster management

  5. Characteristics of a Sensor Node • Small device that can sense information around itself • Capable of short range communication • Constrained in energy supply and bandwidth

  6. IEEE 802.15.4 • A MAC layer protocol for WSNs • Uses CSMA-CA channel access • Low power consumption • Supports star and peer-to-peer topology

  7. 6LoWPAN: Extending IPv6 to Low Power WPANs • 6LoWPAN defines how to extend IPv6 over low data rate, low power networks(LoWPAN) • Why? • Employing tools already developed rather than starting from scratch • Challenges • Large size of IPv6 datagram • A responsive network layer is needed • The need for supporting Multi-hop topology

  8. IPv6 over IEEE 802.15.4 • 6LoWPAN introduces an adaptation layer between the IP stack’s link and network layers • The adaptation layer enables efficient transmission of IPv6 datagrams over 802.15.4

  9. 6LoWPAN Adaptation Layer • Introducing the idea of stacked header: • You only pay for what you use • This layer provides : • Header compression • Fragmentation • Support for layer-two forwarding

  10. 6LoWPAN Stacked Headers • All header formats are identified using dispatch header • The mesh header is used to encode the hop limit • The fragmentation header supports the fragmentation and reassembly of payloads

  11. Utilizing Separate Headers • 1)Point to Point Small Packet • 2)Fragmented Large Packet • 3)Mesh Transmitted Packet

  12. Routing in 6LoWPAN • Mesh Under Routing • No IP routing • Routing within the LoWPAN • Route Over Routing • Routing at the IP layer • Utilizing network-layer capabilities defined by IP

  13. Conclusion • 6LoWPAN introduces a high quality IPv6 network stack on 802.15.4 • 6LoWPAN does not solve all of the problems and issues related to sensor networks • Future research areas: • Neighbor Discovery • secure neighbor discovery • service discovery

  14. Thank You For Your Attention

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