Multiple Web Cameras, Two-Way Video Tranmsission
The following graphs are representative of traffic data gathered for when Computer 1 transmitted and received video to/from three, four, five then six other computers (Connections A to D). Data sent to receiving computers was automatically sent via Yahoo! for efficiency purposes. The ACK replies from the participating computers were also sent via Yahoo!. Video data sent from Computers 2 to 7 was, however, sent directly to Computer 1 and in turn, Computer 1 sent all ACKs back to Computers 2 to 7 directly.
Inter-packet Arrival Results
All packet inter-arrival graphs showed very similar characteristics regardless of the number of computers transmitting web camera video to/receiving from Computer 1.
We can see in Figures 6.1 to 6.4 that regardless of the number of computers sending web camera video to Computer 1, they all shared very similar packet inter-arrival time characteristics. 64.4 to 69.5% of data packet inter-arrival times were less than or equal to 0.25msec from Computers 1 to 7.
Figures 6.5 to 6.8 show that less than 15% of ACK packets arrived to Computer 1 with an inter-packet arrival time of less than 0.25msec (1usec to 249usec). For all connections (A to D) packet inter-arrival times were widely distributed between 100msec to 200msec with a frequency of less than 1%.
We can see from Figure 6.9 that approximately 71% of data packets from Computer 1 to Yahoo! had an inter-arrival time of less than 0.25msec. Figure 6.10 is representative of the 38.1 to 43.5% of ACK packets sent from Yahoo! to Computer 1 having an inter-arrival time of less than or equal to 1msec. A distribution of peaks between 76msec to 118msec with a frequency of less than 1% also occured, as seen in Figure 6.10.
Packet Length Results
All packet length graphs showed very similar characteristics regardless of the number of computers transmitting web camera video to/receiving from Computer 1.
Figures 6.11 to 6.14 are representative of the 30.1 to 38.8% of data packets that were 52bytes long and 32.8 to 39.1% of data packets that were 1500bytes long, sent from computers in Connections A to D to Computer 1. Figure 6.15 shows a typical cumulative graph where 100% of packets from Computer 1 were 46bytes long (ACK packets).
Figures 6.16 is representative of the 27.1 to 28.9% of packets that were 52bytes long and over 42.5 to 45% of packets that were 1420bytes long for data sent from Computer 1 to Yahoo!. Figure 6.17 is representative of the 100% of packets from Yahoo! that were 46bytes long (ACK packets).
Inter-packet Arrival Results
All packet inter-arrival graphs showed very similar characteristics regardless of the number of computers transmitting web camera video to/receiving from Computer 1.
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We can see in Figures 6.1 to 6.4 that regardless of the number of computers sending web camera video to Computer 1, they all shared very similar packet inter-arrival time characteristics. 64.4 to 69.5% of data packet inter-arrival times were less than or equal to 0.25msec from Computers 1 to 7.
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Figures 6.5 to 6.8 show that less than 15% of ACK packets arrived to Computer 1 with an inter-packet arrival time of less than 0.25msec (1usec to 249usec). For all connections (A to D) packet inter-arrival times were widely distributed between 100msec to 200msec with a frequency of less than 1%.
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We can see from Figure 6.9 that approximately 71% of data packets from Computer 1 to Yahoo! had an inter-arrival time of less than 0.25msec. Figure 6.10 is representative of the 38.1 to 43.5% of ACK packets sent from Yahoo! to Computer 1 having an inter-arrival time of less than or equal to 1msec. A distribution of peaks between 76msec to 118msec with a frequency of less than 1% also occured, as seen in Figure 6.10.
Packet Length Results
All packet length graphs showed very similar characteristics regardless of the number of computers transmitting web camera video to/receiving from Computer 1.
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Figures 6.11 to 6.14 are representative of the 30.1 to 38.8% of data packets that were 52bytes long and 32.8 to 39.1% of data packets that were 1500bytes long, sent from computers in Connections A to D to Computer 1. Figure 6.15 shows a typical cumulative graph where 100% of packets from Computer 1 were 46bytes long (ACK packets).
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Figures 6.16 is representative of the 27.1 to 28.9% of packets that were 52bytes long and over 42.5 to 45% of packets that were 1420bytes long for data sent from Computer 1 to Yahoo!. Figure 6.17 is representative of the 100% of packets from Yahoo! that were 46bytes long (ACK packets).
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