Perspectives de gestion de la consommation
énergétique dans le réseau domestique
François Baron, THOMSON.
Francois.baron@thomson .net Brest, 26 mars 2009

Home Network Power consumption
Home Network equipments
Communication technologies
Power consumption
Rules, standards, labels
Some use cases

Home Network equipments
Room TV Gaming console
Desktop PC
Laptop PC PS3/Xbox/Wii
GateWay
NAS
Main TV
Photo Map
DVD/ Bluray
STB

Communication technologies
Communication technologies
– WiFi
Wireless, 54…300Mbps ( 1Gbps for .11ac)
– Ethernet
Needs house wiring, 100Mbps…1Gbps
– CPL
No new wire; up to 50-60Mbps
– POF
Needs home wiring, up to 1Gbps
– Bluetooth
Wireless, 1Mbps ( 100Mbps for BT3.0)
– ZigBee
Wireless; 250kbps; suited for home automation
–…

Power Consumption : Rules, Standards, Labels
EU Mandatory regulations
“EuP” Directive 2005/32/EC on eco-design requirements for Energy-Using Products:
(Lot7) EPS: regulated, mandatory expected Mar. 2010 - all EuPs, (η>87%)
(Lot6) Standby and Off-mode: regulated, mandatory Jan. 2010 - all EuPs, (Poff<1W…0.5W)
(Lot15) Simple STB: regulated, mandatory Mar. 2010 - (Pstby<1W..0.5W, power-down t<3hrs)
Next step :
– (Lot18) Complex STBs – regulation to be issued in 2010 (effects 2011?)
– Broadband equipment (ADSL modems…) considered for future work
– Networked Standby, Broadband… other environmental impacts, waste, product end of life
EU Volontary agreements : Codes of Conduct
Yearly volontary agreements
Using a philosophy of Best Current Practice
DTV, STB CoC :
– V7 now (Watt limits) : base power + options
– V8 in preparation for [2010-2012+] : 50-60kWh limits + options, auto stby < 4hrs
Broadband Products CoC :
– V3 for [2009-2011] (Watt limits,)
– Assumes HW switch to lowest possible power consumption mode.

Power Consumption : Rules, Standards, Labels
Energy Star
Label for US products
Using Total Energy Consumption (TEC) method of specification
(specified in kWh/year rather than Watts).
– Based on usage scenarios with a percentage of time spent in various
modes (e.g., 2hrs recording (while watching), 5 hrs watching, 19 hrs
idle….).
Effective date : Sept 2009.
CEA Energy Efficiency Working Group (EEWG)
CEA has produced two energy related STB standards
– CEA-2013-A (Digital STB Background Power Consumption)
– CEA-2022 (Digital STB Active Power Consumption Measurement)

Power Consumption : some figures
Gaming console Desktop PC 130-700 W
Laptop PC 10-30 W PS3/Xbox 200 W
Wii 20W
GateWay 15-20W /9W
NAS Basic 14W / 10W
RAID5 45W / 40W
Networking Power
Ethernet : 1.5W/node
PLC : 5W/node
Main TV – 30W – 200W
Photo Map
/ down to 1 W POF : 1.5W/node
5-20 W
DVD/ Bluray 25-30W / 3W WiFi : 1.2W/node
STB 20 W /
ZigBee : 5mW/node
8W down to 2W

Use case : one evening…
Gaming console Desktop PC 130-700 W
Laptop PC 10-30 W PS3/Xbox 200 W
Wii 20W
GateWay 15-20W /9W
NAS Basic 14W / 10W
RAID5 45W / 40W
Watching TV
Play recorded film on TV
Kid 1 go to bedroom and play
Main TV – 30W – 200W
Dad use PC to download a film for tomorrow
/ down to 1 W
Kid 2 works on laptop with desktop and internet
DVD/ Bluray 25-30W / 3W
Dad’ go back to see the film
STB 20 W /
Mom’ go browsing on internet
8W down to 2W
Kid 1 stop playing and watch film
Go to sleep (still downloading…)

Conclusion
Home Network…
Heterogeneous
Complex
Power Consuming
Devices not used continuously (can be turned off)
Usage …
Good knowledge on the network and turn on/off device when needed :
complicated
Keep (nearly) all devices turned on : power consuming
Automatically turn on/off device depending on the need
– UPnP low power ?
– Low power Overlay network for remote on/off (ZigBee, LAN, PLC…)?
–…