1. Insomnia
in
the
Access
Or
How
to
Curb
Access
Network
Energy
Cosump7on
Marco
Canini
EPFL
Eduard
Goma,
Alberto
Lopez
Toledo,
Nikolaos
Laoutaris
(Telefonica
Research),
Dejan
KosCć
(EPFL),
Pablo
Rodriguez
(Telefonica
Research)
,
Rade
Stanojević
(IMDEA
Networks),
Pablo
Yagüe
ValenOn
(Telefonica
Research)
浅見・川原研究室 M1 山口
2. 論文の概要
• ICTにおける電力消費
ACCESS
−
data
center,
backbone,
other
70
–
80
%
access
network,
PC
access
networkに関する有効
な消費電力削減手法がない
• DSLにおけるuser/ISPの消費電力削減の研究
−
消費電力の66%を削減
年間で33TWh(USの原発3基分)
2
3. DSL
access
network
ACCESS
ISP
part
User
part
Distribu7on
Frame
METRO
CORE
Cable
bundle
DSL
Access
Mul7plexers
Central
(DSLAMs)
Gateway
Office
3
26. 補足:ISPの電力消費削減量
60
% of total energy savings
50 Optimal SoI + k-switch
40
on the ISP side
BH2 + k-switch
30
20
10
SoI
0
0 5 10 15 20 24
Time [h]
26
27. Number of sleeping gateways 補足:gateway密度
40
35
30 home
+
2
remote
25
gateways
20
15
10 50%+
of
gateways
sleep
5
0
1 2 3 4 5 6 7 8 9 10
Mean number of available gateways per client
27