A Hybrid Architecture - Scalable Continuous Media Streaming Systems - page 348

80

TVoD

NVoD

60

UVoD

40

20

SS-VoD

0

0 1 2 3 4 5

Arrival Rate (requests/second)

Figure 19.12 Comparison of latency for different arrival rates

400

NVoD 300

TVoD

UVoD

200

SS-VoD 100

0

0 2 3 4

1 5

Arrival Rate (requests/second)

Figure 19.13 Comparison of channel requirement for different arrival rates

19.4.4 Channel Requirement
Channel requirement is defined as the minimum number of channels needed to satisfy a given
latency constraint at a certain arrival rate. Figure 19.13 plots the channel requirements of SS-
VoD, UVoD, TVoD, and NVoD versus arrival rates from 0.01 to 5 requests per second. The
latency constraint is set to 10 seconds.