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Broadcast

Broadcast. Root. Use a spanning tree. synchronous. It takes the same time at link to send a message It takes the same time at each node to process the incoming data. nodes. levels. Time complexity:. Message complexity:. asynchronous. Links and nodes may have different delays. slow

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Broadcast

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Presentation Transcript

  1. Broadcast

  2. Root Use a spanning tree

  3. synchronous • It takes the same time at link to send a message • It takes the same time at each node to process • the incoming data

  4. nodes levels Time complexity: Message complexity:

  5. asynchronous Links and nodes may have different delays

  6. slow link

  7. slow link

  8. Actual delivery

  9. nodes levels Time complexity: Message complexity:

  10. Convergecast

  11. synchronous

  12. nodes levels Time complexity: Message complexity:

  13. asynchronous

  14. nodes levels Time complexity: Message complexity:

  15. Building a BFS Spanning Tree

  16. Tree algorithm for node : Upon receipt of <invitation> message from neighbor node : If not member of tree: accept invitation by sending <accept> message to ; (the father) Send invitations to all neighbors, except If member of tree: decline invitation by sending <reject> message to ;

  17. synchronous

  18. A node initiates the BFS process <invitation> <invitation>

  19. become members of tree

  20. <accept> <accept>

  21. <reject>

  22. <reject>

  23. Alternative solution

  24. reject

  25. nodes edges diameter Time complexity: Message complexity:

  26. asynchronous

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