Transcript Where Do You Want To Peer Today?

Varsha Jain, Prof. Gerard Parr, Dr. Philip Morrow
EPSRC-DST India-UK Centre of Excellence in Next Generation
Networks Systems and Services
Sensing/on/off
Power ON/OFF/
low power clouds
YouTube
Analog
phone
storage
LAN
IPTV
Data centers
Active/sleep mode
IP connectivity
On/Off
VOD
Wifi
phone
STB
TV
Firewire IEEE 1394
L2/L3 low power
state
sleep
Wireless LAN
xDSL access
homegateway
BNG/
BRAS
Power ports ON/
OFF
Edge- router
listening/sleep/
active
ZIGBEE/
BLUETOOTH
laptop
Power-off
WiMAX
OLT
sensors
Sensors detects
the person at home
Ethernet
switch
Core-Metro IP network
Access Network
 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.
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 An application can operate at n
different performance (QoS) levels,
denoted A0, A1... An,
Qmax
A0
A1
 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-endsystem all along operate close to
the optimal curve.
A2
x
0
Emax
y
A3
Emin
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We examine the test cases into two different access networks;
(1) ADSL (2) WiMAX.

WiMAX – video conferencing packet delay
variation vs. energy consumption
ADSL voice packet delay variation vs. energy
consumption
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WiMAX voice delay variations vs. energy
consumption
ADSL-video conferencing packet delay
variation vs. energy consumption
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
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.
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