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A Measurement Study of Cache Rejection in P2P Live Streaming System

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Yishuai Chen
Yishuai Chen
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A Measurement Study of Cache Rejection in P2P Live Streaming System Yishuai Chen*, Changjia Chen, Chunxi Li Network Research Group, Telecom Lab, Beijing Jiaotong University http:// telcomlab.googlepages.com
Index ,[object Object],[object Object],[object Object],[object Object]
Limited Cache Size ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Sliding Window ,[object Object],[object Object]
Example ,[object Object],[object Object],1111111111111…………1111111111 001011011 1111111111111…………1111111111 001011011 1111111111111 0000000000001 Get a new chunk Reject the same amount of chunks No, We are downloading!
Rate Changes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Measurement ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Rs vs. Ro(One Peer) Rate Change Tracking (PLL) Latency
Peers Change Ro at Different Time ,[object Object]
[object Object],At the Same Chunk!
Detail, 4 Peers, Rate Change Point 4
Rs also Change at the Same Chunk! ,[object Object]
Behavior & Meaning ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Modeling ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Validation
Virtual Buffer Abstract ,[object Object],[object Object],[object Object],[object Object],[object Object]
Thanks!
Backup
Numerical Result Rate change chunk offset: 104923 94901 55382 53509 33106 24206 Max 104890 94879 55372 53474 33086 24193 Min 33 22 10 35 20 13 Max-Min 104909 94895 55377 53498 33097 24200 Mean 12.59 7.17 4.84 11.14 7.20 4.93 Std. Dev 6 5 4 3 2 1 Interval
Comparison: Ro and Rs Change Change Chunk Offset Difference -126 56 186 -42 -72 3 Difference 6 5 4 3 2 1 Interval
Lack of Explicit Result ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Performance ,[object Object],[object Object],[object Object],[object Object]
Reference ,[object Object],[object Object]

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A Measurement Study of Cache Rejection in P2P Live Streaming System

  • 1. A Measurement Study of Cache Rejection in P2P Live Streaming System Yishuai Chen*, Changjia Chen, Chunxi Li Network Research Group, Telecom Lab, Beijing Jiaotong University http:// telcomlab.googlepages.com
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8. Rs vs. Ro(One Peer) Rate Change Tracking (PLL) Latency
  • 9.
  • 10.
  • 11. Detail, 4 Peers, Rate Change Point 4
  • 12.
  • 13.
  • 14.
  • 16.
  • 19. Numerical Result Rate change chunk offset: 104923 94901 55382 53509 33106 24206 Max 104890 94879 55372 53474 33086 24193 Min 33 22 10 35 20 13 Max-Min 104909 94895 55377 53498 33097 24200 Mean 12.59 7.17 4.84 11.14 7.20 4.93 Std. Dev 6 5 4 3 2 1 Interval
  • 20. Comparison: Ro and Rs Change Change Chunk Offset Difference -126 56 186 -42 -72 3 Difference 6 5 4 3 2 1 Interval
  • 21.
  • 22.
  • 23.