Comparison of Wireless Protocols. Paweł Ciepliński

Transcription

1 Comparison of Wireless Protocols

2 Comparison of Wireless Protocols Field test and comparing protocol vs nstreme In Point To Multipoint scenarios

3 IDEA? What force me to make such a comparison.

4 Testing Equipment Network: Access Point : RB dbi sector Antenna 1 CPE's RB dbi Panel Antenna

5 Testing Equipment Testbed: Linux Server Intel C2D 2GHz 512 MB RAM 1 mbps ethernet interface Debian Lenny traffic terminals RB 411 OpenWRT backfire 1.3

6 Testing Location

7 Testing Network Overview

8 82.11: Network Configuration 82.11a network with no fancy configuration (most of settings were default) Nstreme: No aggregation Just nstreme enabled with polling with CSMA on

9 Traffic Generator How to choose good Generator? Must support multipoint scenarios Must logs all data like: throughput, packetloss, delay, etc. Must be FREE J

10 Traffic Generator D-ITG (Distributed Internet Traffic Generator) is a platform capable to produce traffic at packet level accurately replicating appropriate stochastic processes for both IDT (Inter Departure Time) and PS (Packet Size) random variables (exponential, uniform, cauchy, normal, pareto,...). D-ITG supports both IPv4 and IPv6 traffic generation and it is capable to generate traffic at network, transport, and application layer. Available at: ITG/

11 Traffic Scenario Server starting sending flow #1: 1 mbps UDP traffic to terminal 1, and terminal 1 back to server Waits 3 seconds Servers starting flow #2: 1mbps UDP to Terminal 2 and Terminal 2 back to server. And so on...

12 Results

13 Throughput Bitrate - 1mbps UDP - nstreme Bitrate [kbps] TIME [s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1

14 Throughput Bitrate - 1mbps Bitrate [kbps] Time [s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1

15 Aggregate Throughput Throughput per AP Bitrate [ kbps] 6 nstreme The linked image cannot be displayed. The file may have been moved, renamed, or deleted. Verify that the link points to the correct file and location Time [s]

16 Delay Delay - 1mbps - nstreme 1, 6,31 3,981 2,512 1,585 1,,631,398,251 Delay [s],158,1,63,4,25,16,1,6,4,3,2, Time[s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1

17 Delay Delay - 1mbps , 6,31 3,981 2,512 1,585 1,,631,398,251 Delay [s],158,1,63,4,25,16,1,6,4,3,2, Time[s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1

18 Aggregate Delay Agregate Delay 1 1 Delay [s] nstreme 82.11,1,1 Time [s]

19 Packet Loss Packetloss - 1mbps - nstreme Packetloss [p/s] Time[s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1

20 Packet Loss Packetloss - 1mbps Packetloss [p/s] Time[s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1

21 Jitter Jitter - 1mbps - nstreme 3,981 1,585,631,251 Jitter [s],1,4,16,6,3, Time[s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1

22 Jitter Jitter - 1mbps ,981 1,585,631,251 Jitter [s],1,4,16,6,3, Time[s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1

23 Traffic Scenario II - Voice Server starting #1 voice call traffic to terminal 1 Waits 3 seconds Server starting #2 voice call traffic to terminal 2 And so on...

24 Traffic Scenario II - Voice Voip Traffic: G.711 1sample / pkt Estimated Traffic (Layer 3): Bandwidth: 96,1 kbps Packet rate: 1 pkt/s Packet size: 12 Bytes

25 Results

26 Throughput VoIP Throughput - nstreme Bitrate [kbps] Time [s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1 CPE11 CPE12 CPE13 CPE14 CPE15 CPE16 CPE17 CPE18 CPE19

27 Throughput VoIP Throughput Bitrate [kbps] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1 CPE11 CPE12 CPE13 CPE14 CPE15 CPE16 CPE17 CPE18 CPE19 Time [s]

28 Delay VoIP Delay - nstreme 1 1 Delay [s],1, Time [s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1 CPE11 CPE12 CPE13 CPE14 CPE15 CPE16 CPE17 CPE18 CPE19

29 Delay VoIP Delay Delay [s],1, Time [s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1 CPE11 CPE12 CPE13 CPE14 CPE15 CPE16 CPE17 CPE18 CPE19

30 Packet Loss VoIP Packetloss nstreme Packetloss [p/s] Time [s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1 CPE11 CPE12 CPE13 CPE14 CPE15 CPE16 CPE17 CPE18 CPE19

31 Packet Loss VoIP Packetloss Packetloss [p/s] Time [s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1 CPE11 CPE12 CPE13 CPE14 CPE15 CPE16 CPE17 CPE18 CPE19

32 Jitter VoIP Packetloss - nstreme 1,995 1,,51,251,126 Packetloss [p/s],63,32,16,8,4,2, CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1 CPE11 CPE12 CPE13 CPE14 CPE15 CPE16 CPE17 CPE18 CPE19 Time [s]

33 Jitter VoIP Packetloss ,995 1,,51,251,126 Packetloss [p/s],63,32,16,8,4,2,1 The linked image cannot be displayed. The file may have been moved, renamed, or deleted. Verify that the link points to the correct file and location Time [s] CPE1 CPE2 CPE3 CPE4 CPE5 CPE6 CPE7 CPE8 CPE9 CPE1 CPE11 CPE12 CPE13 CPE14 CPE15 CPE16 CPE17 CPE18 CPE19

34 What about NV2? NV2 was not available when test was performed.

35 Conclusion does not provide reliable long distances or multipoint links! Testing Point-Point and Point-MultiPoint gives different results!