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Mesh Networking

Mesh Networking

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Mesh Networking

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  1. Mesh Networking Emily Bates | Joe Garrow Andreas Gillberg | Al Godin

  2. Network topology review Types of mesh topologies Disadvantages of mesh Advantages of mesh Modern uses of mesh networking Why hasn’t it caught on? Agenda

  3. The topology is the physical layout of a network • Related to the specific networking technology and specific standards used • Types of Network Topologies • Star • Bus • Ring • Mesh Network Topologies

  4. Most common topology • All devices connected to a central point • The basic hub sends/receives in and out all information to all devices Star Topology

  5. Each device connect to the next device in a logical loop • Send packets around loop • Each device acts as a repeater Ring Topology

  6. Each device connected to the one next to it • All devices receive every signal sent • Each device has to coordinate when it sends data so it won’t collide with other data Bus Topology

  7. Wired Mesh • Every device is connected on a dedicated line • Many connections • Wireless Mesh • Fixed wireless using ad hoc • Mobile peer-to-peer using ad hoc • Node to node (infrastructure) Mesh Topology

  8. https://www.youtube.com/watch?v=hWnvRjSlA1Q Wireless Mesh Network Video

  9. Every device connected to every other device • Direct communication between devices • Difficult to scale Full Mesh Topology

  10. Devices are grouped into nodes which are connected to other nodes • Typically used for larger networks • Still allows communication between devices but not every device is directly connected to each other Partial Mesh Topology

  11. Simplest form of wireless network • Download and upload link connected by two antennas in direct communication with each other • Not scalable Point-to-Point Partial

  12. Uplink node is connected to omni-directional antenna that transmits data to other antennas • Nodes download data from their dedicated antenna • Better scalability than point to point • Antennas must be in range of each other Point-to-Multipoint Partial

  13. Similar structure to wired internet • Multiple omni-directional antennas connect with each other and send information to devices • Data sent along optimal path from sender to receiver Multipoint-to-Multipoint Partial

  14. Connection of M2M sub-networks with other M2M sub-networks • Uses two different types of antennas to connect nodes • Allows for greater functionality over a greater area Metropolitan Partial

  15. Wired Mesh Networks • Large investment necessary to build wired network (cables, hardware ports, etc) • Difficult to install and reconnect • Bulk of wiring can exceed space restrictions • Wireless Mesh Networks • Uses a lot of bandwidth causing slower interactions • Low interoperability Disadvantages

  16. General Mesh Networks • Connect to many devices simultaneously • No need for a central node • Easily scalable • Wireless Mesh Networks • Inexpensive • Even more scalable • Supports high demand • Outdoor connectivity • Fault tolerance Advantages

  17. Home automation • Education • Healthcare • Military/Defense • Public safety • Hotels • Warehousing • Mobile communication • Solar powered networks • Developing communities Versatility

  18. iOS and Android app • Utilizes new Multipeer Connectivity framework • Infrastructure WiFi • Peer-to-Peer WiFi • Bluetooth PANs • 100 foot range Communication: FireChat

  19. US non-profit organization • Bring technology to developing nations • XO laptop model • Rugged design • Flash storage • Linux OS • Mesh networking • Student collaboration • Greater range • No maintenance • 2.4 million laptops delivered One Laptop Per Child

  20. Solar and battery powered access points • Could provide universal access • Inadequate power SolarMESH

  21. “Take away the wires and routes and we will still communicate.” • In January 2011, Egyptian government blocked the entire internet • Open Mesh Project aims to circumvent government restrictions • Open and free communication internationally • Two-click installation Open Mesh Project

  22. Free and open mesh network • Vienna, Austria • https://www.youtube.com/watch?v=PGlMmp056_U FunkFeuer

  23. Mobility • Speed and performance • Scalable • Secure through encryption • Variety of uses • Police • Soldiers • Tanks and military vehicles Military, Defense, Public Safety

  24. Complexity to set up and maintain • Difficult for routing protocols to scale over a few hundreds nodes • Limited range of wireless user devices Technical Limitations

  25. Cannot be easily regulated • Regarded as a potential danger by the government • Ethical issues: Seattle Police Department Other Issues