CS4344 Lecture 9: Traffic Analysis
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This document analyzes the characteristics of network traffic generated by online multiplayer games like Counter-Strike. It finds that game traffic has predictable periodic patterns as servers regularly broadcast updates. Counter-Strike traffic in particular uses UDP, has an average packet size around 80 bytes, and accounted for 3rd largest source of UDP packets behind DNS and RealAudio at the time. The study collected 500 million packets from over 5,000 Counter-Strike clients over one week to analyze bandwidth usage and packet sizes.
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CS4344 Lecture 9: Traffic Analysis
- 1. Networked Game Traffic Analysis 1
- 2. Web File Transfer BitTorrent Skype Calls 2
- 3. Understanding network traffic is crucial to traffic engineering and protocol design 3
- 4. What are the characteristic of traffic generated by games? 4
- 5. data rate packet size UDP or TCP pattern 5
- 6. Differences between RTS FPS RPG ? 6
- 7. Counter Strike 7
- 8. 20,000 servers as of May 2002 8
- 9. 3rd largest source of UDP packets (behind DNS and RealAudio) 9
- 10. Centralized Architecture 10
- 11. 32 players supported 11
- 12. 3 minutes per round 12
- 13. 30 minutes per map 13
- 14. Traffic includes state updates text messages voice : 14
- 15. How to collect packet traces? 15
- 16. Run own Counter Strike’s server 16
- 17. Collect packets over one week 17
- 18. 5886 different clients 18
- 19. 500 million packets analyzed 19
- 20. 500 million packets analyzed 20
- 21. 21
- 22. 22
- 23. 542 341 kbps kbps mean out-going mean in-coming bandwidth bandwidth 23
- 24. 24
- 25. 25
- 26. 26
- 27. 27
- 28. 28
- 29. 50 ms periodic broadcast from server 29
- 30. 30
- 31. 31
- 32. 80.3 average packet size in bytes 32
- 33. 39.72 129.51 average in- average out- coming packet going packet size in bytes size in bytes 33
- 34. 34
- 35. small packets (< 50 bytes) 35
- 36. periodic 36
- 37. predictable 37
- 38. Shen Zhou Online 38
- 39. 39
- 40. 20 hours of traces 40
- 41. 112,369 connections 41
- 42. 58 terra bytes of data 42
- 43. 43
- 44. 36% 52% of packets are of packets are 23 27 bytes bytes 44
- 45. 45
- 46. 46
- 47. 7 kbps of bandwidth on average 47
- 48. 48
- 49. 49
- 50. 200 ms periodic broadcast from server 50
- 51. 51
- 52. 52
- 53. 53
- 54. “flash crowd” effects 54
- 55. even smaller packets 55
- 56. small bandwidth 56
- 57. periodic 57
- 58. predictable 58
- 59. temporal locality 59
- 60. spatial locality 60