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One-Way Video Transmission
The following graphs represent the packet inter-arrival time and lengths captured by Web Camera 1 transmitting video to Computer 2. This was the only video data being sent and resulted in two flows, the video data from Computer 1 to Computer 2 and the data acknowledgements from Computer 2 to Computer 1.
Inter-packet Arrival Results
Figure 2.1: Data Packet Flow
Figure 2.2: Data Packet Flow
Figure 2.3: ACK Packet Flow
Figure 2.4: ACK Packet Flow
We can see from Figures 2.1 and 2.2 (cropped for visual ease) that 68.6% of data packets had an inter-arrival time of 0.25msec or less. Figures 2.3 and 2.4 indicate that of all the ACK packets from Computer 2, just under 8% had an inter-arrival time of less than or equal to 0.25msec. We can also clearly see the wide distribution of packet inter-arrival times between 100msec and 200msec.
Packet Length Results
Figure 2.5: Data Packet Flow
Figure 2.6: Data Packet Flow
Figure 2.7: ACK Packet Flow
Figure 2.8: ACK Packet Flow
Figures 2.5 and 2.6 show that just under 31% of packets being sent by Computer 1 were 52bytes long and 37% were 1500bytes long. There is also a low percentage packet length distribution from approximately 1084bytes up to 1500bytes. Both Figures 2.7 and 2.8 show that Comptuer 2 replies to Computer 1 with 46byte ACK packets.
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Last Updated: Monday 28-Jun-2004 10:00:04 AEST URL: Maintained by: Ana Pavlicic apavlicic@groupwise.swin.edu.au Authorised by: Grenville Armitage garmitage@swin.edu.au