1. Varsha Jain, Prof. Gerard Parr, Dr. Philip Morrow EPSRC-DST India-UK Centre of Excellence in Next Generation Networks Systems and Services

2. 2  Power management mechanisms can affect the networks application behaviour such as performance (QoS and QoE) and availability.  Network is highly dynamic in terms of varying access technologies (Wireless, Wired and optical) and their respective different power management capabilities.

3. 3  An application can operate at n different performance (QoS) levels, denoted A0, A1... An,  For each A-state have optimal network system configuration, including choice of hardware and power management settings.  The key idea is to automatically select power management settings that keep the networks from access to HG and further customer-end- system all along operate close to the optimal curve. Q max E max E min A0A0 A1A1 A2A2 A3A3 0 x y

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6.  We examine the test cases into two different access networks; (1) ADSL (2) WiMAX. 6 WiMAX – video conferencing packet delay variation vs. energy consumption ADSL voice packet delay variation vs. energy consumption

7. 7 ADSL-video conferencing packet delay variation vs. energy consumption WiMAX voice delay variations vs. energy consumption

8.  We analysed the inter-relationship between energy consumption and application performance.  ADSL technology highly degrades the application performance in case of low power state while WiMAX is better suited for real time applications at the same time, is more energy efficient in specific conditions. 8