ᚑくᄢቇℂᎿቇ⎇ⓥႎ๔
J. Fac. Sci. Tech., Seikei Univ.
Vol.46 No.2 (2009) pp.107-111
㧔․೎⎇ⓥ⾌ߦଥࠆ⺰ᢥ㧕ࡀ࠶࠻ࡢ࡯ࠢߣࠨ࡯ࡃߩㅪ៤ߦࠃࠆ࠻࡯࠲࡞㔚ജ૶↪㊂೥ᷫࠍታ⃻ߔࠆធ⛯ାภࠪ࡯ࠤࡦࠬߩឭ᩺㐳ฬ ଻▸㧖1㧘 ᩙᨋ િ৻㧖㧞

Proposal of a signaling sequence for connection establishment to reduce the total energy
consumption by both network and end systems
Yasunori OSANA㧖㧝 andABSTRACT :Shin-ichi KURIBAYASHI㧖㧞㧘

Most of conventional measures to treat energy consumption handle servers andnetwork devices separately. Therefore, we proposed the integrated method to reduce the total energy

consumption by the cooperation of network and end systems, and clarified the information items to beexchanged for the cooperation of network and endsyste. This paper proposes the precise signaling

sequence for connection establishment to reduce the total energy consumption by both network and endsystems.

Keywords : Reduction of power consumption, cooperation of network and end systems, signalling(Received Sep. 11, 2009) ࡀ࠶࠻ࡢ࡯ࠢߦ㑐ㅪߒߚ㔚ജ㊂೥ᷫኻ╷ߩᬌ⸛߽ᓥ᧪

㧝㧚߹߃߇߈

߆ࠄㅴ߼ࠄࠇߡ޿ࠆ‫ߣࡃ࡯ࠨޕ‬ห᭽ߦ㧘૶↪ߒߥ޿ᯏེ
 ⒖േ㧔ㅢൕ߿಴ᒛ㧕ߩ೥ᷫ㧘‛ᵹߩᦨㆡൻ㧘↢↥ߩᦨࠍભᱛ⁁ᘒ(sleeping)ߦ⸳ቯ㧘ࡊࡠ࠮࠶ࠨࠢࡠ࠶ࠢᢙߩ⺞ㆡൻߥߤ㧘㧵㧯㨀ᛛⴚߦࠃࠆࠛࡀ࡞ࠡ࡯૶↪㊂ߩᄢ᏷೥ᢛ㧘࿁✢ㅦᐲߩ⺞ᢛ(rate-adaptation)㧘ታ૶↪࿁✢ᢙߩ⺞ᷫ߇ᦼᓙߐࠇࠆ㧔Green by ICT㧕ᢛ(link aggregation)㧘⚻〝㓸⚂㧘ߥߤ߇ߘߩਥߥኻ╷ߢ޽ࠆ‫ޕ‬(1)-(3)‫ߒ߆ߒޕ‬㧘ߘࠇߦ઻ߞߡ ICT ᯏེߘߩ߽ߩߩ㔚ജ૶↪㊂߇Ⴧടߔࠆߎߣ߇੍ ߣߎࠈߢ㧘ᓥ᧪ࠃࠅ㔚ജ૶↪㊂೥ᷫኻ╷ߪࠨ࡯ࡃߥߤ

ᗐߐࠇࠆ(Green of ICT)‫ޕ‬࿖ߩ⹜▚ߢߪ㧘2025 ᐕߦߪ࿖ోߩࠛࡦ࠼ࠪࠬ࠹ࡓߣࡀ࠶࠻ࡢ࡯ࠢߢ೎‫ߦޘ‬ᬌ⸛ߐࠇࠆߎ૕ߩ㔚ജ૶↪㊂ߦභ߼ࠆ㧵C㨀ᯏེ૶↪㔚ജ㊂ߩഀวߪߣ߇ᄙ޿‫߼ߚߩߎޕ‬㧘଀߃߫㔚ജ㊂೥ᷫኻ╷ߣߒߡࠨ࡯

20㧑⒟ᐲߦ㆐ߔࠆ⷗ㄟߺߢ޽ࠆ

‫ߩߎޕ‬ਛߩ⚂ඨಽ߇ࡀ

ࡃߩಣℂㅦᐲࠍૐਅߐߖࠆߣಣℂᤨ㑆߇㐳ߊߥࠅ㧘ߘߩ࠶࠻ࡢ࡯ࠢᯏེߦࠃࠆ߽ߩߣᗐቯߐࠇߡ߅ࠅ㧘࡙ࡆࠠ࠲⚿ᨐࡀ࠶࠻ࡢ࡯ࠢᏪၞߩ଻ᜬᤨ㑆߽㐳ߊߥࠅ㧘ࡀ࠶࠻ࡢࠬࡀ࠶࠻ࡢ࡯ࠢ߿ࠢ࡜࠙࠼ࠦࡦࡇࡘ࡯࠹ࠖࡦࠣߩ᥉෸ߦ࡯ࠢ஥ߪㅒߦ㔚ജ૶↪㊂߇Ⴧടߒߡߒ߹߁น⢻ᕈ߇޽ࠆ‫ޕ‬ࠃࠅߎߩᲧ₸ߪ߹ߔ߹ߔჇടߔࠆน⢻ᕈ߇㜞޿‫ޕ‬৻ᣇ㧘ࡀ࠶࠻ࡢ࡯ࠢ஥ߣࠛࡦ࠼ࠪࠬ࠹ࡓ஥ߢㅪ៤ߒߚ⋭ ICT ᯏེߩ⋭ࠛࡀߦኻߔࠆ⼏⺰ߪ㧘ᓥ᧪ߪࠨ࡯ࡃ߿࠺ࠛࡀኻ╷߽⠨߃ࠄࠇࠆ‫ޕ‬࡯࠲࠮ࡦ࠲ߦኻߔࠆ⋭ࠛࡀᛛⴚߦኻߔࠆᬌ⸛߇ᄙ޿‫ࠨޕ‬ ߎࠇࠍ〯߹߃㧘╩⠪ࠄߪࠛࡦ࠼ࠪࠬ࠹ࡓ஥ߣࡀ࠶࠻ࡢ࡯ࡃߩ㔚ജ㊂೥ᷫኻ╷ߣߒߡߪ㧘ᯏེ߳ߩ⋭ࠛࡀᛛⴚߩ

࡯ࠢ஥ߢㅪ៤ߔࠆߎߣߦࠃࠅ㧘ߘࠇߙࠇ⁛┙ߦታᣉߔࠆ

ዉ౉㧘ᯏེߩ̈઒ᗐൻ̉ߛߌߢߥߊ㧘ࠨ࡯ࡃ૶↪₸߇ૐ႐วߦᲧߴ࠻࡯࠲࡞ߩ㔚ജ૶↪㊂ࠍᄢ᏷ߦ೥ᷫߢ߈ࠆน

޿ᤨߦࠢࡠ࠶ࠢᢙࠍ⪭ߣߔ㧘ࠨ࡯ࡃบᢙࠍ೥ᷫ㧔৻ㇱࠨ⢻ᕈࠍ␜ߒߚ‫ߡߒߘޕ‬㧘ࠛࡦ࠼ࠪࠬ࠹ࡓ஥ߣࡀ࠶࠻ࡢ࡯࡯ࡃߩ㔚Ḯ OFF ߹ߚߪભᱛ(ࠬ࡝࡯ࡊ)⁁ᘒߣߔࠆ㧕㧘ߥߤࠢ஥ߩౕ૕⊛ߥㅪ៤ᣇᴺߣਔ⠪ߢ߿ࠅߣࠅߔߴ߈ᖱႎߣ㧔㧝㧕߇ឭ᩺ߐࠇߡ޿ࠆ‫ޕ‬ߘࠇࠍ〯߹߃ߚାภࠪ࡯ࠤࡦࠬߩ᭎ⷐࠍឭ᩺ߒߚ(4)-,(6)‫ޕ‬߹ߚ㧘ㄭᐕߩ⋭ࠛࡀ࡞ࠡ࡯ᴺߩᡷᱜߥߤࠍ〯߹߃ࠆߣ㧘㧦ℂᎿቇㇱᖱႎ⑼ቇ⑼ഥᢎ (osana@st.seikei.ac.jp)*1㧦ℂᎿቇㇱᖱႎ⑼ቇ⑼ᢎ᝼ ( kuribayashi@st.seikei.ac.jp)*2੹ᓟߪ೑↪⠪Ფߩࡀ࠶࠻ࡢ࡯ࠢ㔚ജ૶↪㊂ߩᛠី߽ᔅⷐߣߥࠆߣᗐቯߐࠇࠆ‫߼ߚߩߘޕ‬㧘╩⠪ࠄߪ᷹ቯߒߚ੤ᵹ㧙㧙࠻࡜ࡅ࠶ࠢ㊂ߣቯᦼ⊛ߦ⺞ᩏߔࠆࡄࠤ࠶࠻ォㅍ⚻〝ᖱႎഀࠅᒰߡࠄࠇࠆ߽ߩߣߔࠆ‫ޕ‬ࠍ߽ߣߦ㧘ࡀ࠶࠻ࡢ࡯ࠢ㔚ജ૶↪㊂ࠍฦ೑↪⠪ߦ◲ᤃߦ

࡮Setup: ࠦࡀ࡚ࠢࠪࡦ⏕┙ⷐ᳞ࡔ࠶࠮࡯ࠫ㧘Connect:(4)-(6)

ᜲಽߔࠆᚻᴺ߽ឭ᩺ߒߚ

ࠦࡀ࡚ࠢࠪࡦ⏕┙ᔕ╵ࡔ࠶࠮࡯ࠫ㧘Connect Ack㧦ࠦࡀ‫ޕ‬ ᧄⓂߢߪ㧘╩⠪ࠄ߇ឭ᩺ߒߚࠛࡦ࠼ࠪࠬ࠹ࡓ஥ߣࡀ࠶࡚ࠢࠪࡦ⏕┙ᔕ╵⏕⹺ࡔ࠶࠮࡯ࠫ
࡮DA㧘DB㧦࠻࡯࠲࡞㔚ജ૶↪㊂ߩ೥ᷫ╷ࠍታᣉߔࠆߣࠛ

࠻ࡢ࡯ࠢ஥ㅪ៤ߦᔅⷐߥធ⛯ାภࠪ࡯ࠤࡦࠬߩ⹦⚦ࠍ᣿ࡦ࠼ࠪࠬ࠹ࡓ A㧘ࠛࡦ࠼ࠪࠬ࠹ࡓ B ߘࠇߙࠇߢ೥ᷫߢࠄ߆ߦߔࠆ‫ޕ‬߈ࠆ㔚ജ૶↪㊂
࡮UA㧘UB㧦࠻࡯࠲࡞㔚ജ૶↪㊂ߩ೥ᷫ╷ࠍታᣉߔࠆߣࠛ㧞㧚ࠛࡦ࠼ࠪࠬ࠹ࡓ஥ߣࡀ࠶࠻ࡢ࡯ࠢ஥ㅪ៤ߦᔅ

ࡦ࠼ࠪࠬ࠹ࡓ A㧘ࠛࡦ࠼ࠪࠬ࠹ࡓ B ߘࠇߙࠇߢჇടߔ

ⷐߥធ⛯ାภࠪ࡯ࠤࡦࠬߩ᭎ⷐࠆ㔚ജ૶↪㊂

࡮D1㧘Dt㧘D2㧦࠻࡯࠲࡞㔚ജ૶↪㊂ߩ೥ᷫ╷ࠍታᣉߔࠆ ╩⠪ࠄ߇ᢥ₂(3)㨪(5)ߢឭ᩺ߒߚធ⛯ାภࠪ࡯ࠤࡦࠬ

ߣࡁ࡯࠼ 1㧘ਛ⛮ࡁ࡯࠼㧘ࡁ࡯࠼ 2 ߘࠇߙࠇߢ೥ᷫߢ

ࠍ࿑ 1 ߦ␜ߔ‫ߪࠇߎޕ‬㧘න૏ᤨ㑆ᒰߚࠅߩᗐቯ㔚ജ૶↪

߈ࠆ㔚ജ૶↪㊂㊂ࠍࠨ࡯ࡆࠬⷐ᳞Ფߦផቯߒ㧘ߘࠇࠍࠦࡀ࡚ࠢࠪࡦ⏕┙࡮U1㧘Ut㧘U2㧦࠻࡯࠲࡞㔚ജ૶↪㊂ߩ೥ᷫ╷ࠍታᣉߔࠆᤨߦࠛࡦ࠼ࠪࠬ࠹ࡓߣࡀ࠶࠻ࡢ࡯ࠢ㑆ߢ੤឵ߔࠆߣ޿߁

ߣࡁ࡯࠼ 1㧘ਛ⛮ࡁ࡯࠼㧘ࡁ࡯࠼ 2 ߘࠇߙࠇߢჇടߔ⠨߃ᣇߦၮߠ޿ߚ߽ߩߢ޽ࠆ‫ߚ߹ޕ‬㧘ࠤ࡯ࠬ 1 ߣࠤ࡯ࠬ2 ߪࠛࡦ࠼ࠪࠬ࠹ࡓ஥߆ࠄ࠻࡯࠲࡞㔚ജ૶↪㊂ߩ೥ᷫ╷ࠆ㔚ജ૶↪㊂ࠍឭ᩺ߔࠆ႐ว㧘ࠤ࡯ࠬ 3 ߣࠤ࡯ࠬ 4 ߪࡀ࠶࠻ࡢ࡯ࠢ஥

࡮flag㧦࠻࡯࠲࡞㔚ജ૶↪㊂ߩ೥ᷫ╷ࠍታᣉߔࠆ႐วߪ߆ࠄឭ᩺ߔࠆ႐ว㧘ߦኻᔕߔࠆ‫ޕ‬

̈1̉
㧔ON㧕㧘ታᣉߒߥ޿႐วߪ̈0̉(OFF)㧘ࠍ⸳ቯ‫ޕ‬ ࿑ 1 ߦ߅޿ߡ૶↪ߔࠆ⸥ภߩቯ⟵ࠍએਅߦ⺑᣿ߔࠆ‫ޕ‬ߥ߅㧘࿑ 1 ߢߪ੹࿁ឭ᩺ߔࠆ㔚ജ૶↪㊂೥ᷫ╷ߦ㑐ㅪߔ㧟㧚ធ⛯ାภࠪ࡯ࠤࡦࠬߩౕ૕଀ࠆࡄ࡜ࡔ࡯࠲ߛߌࠍ⴫␜ߒߡ޿ࠆ‫⋧޿ߥ޿ߡࠇߐ⸥⴫ޕ‬㧚 ࠤ࡯ࠬ㧝ߩౕ૕଀

ᚻࠕ࠼࡟ࠬ߿ⷐ᳞ߐࠇߚ⸘▚⢻ജ㧛Ꮺၞ㧛ࠨ࡯ࡆࠬಣℂԘ ߹ߕ㧘ࠛࡦ࠼ࠪࠬ࠹ࡓ A ߪ࿑ 2 ߦ␜ߔ⁁ᘒߦߥߞߡ

ᤨ㑆ߥߤߩࡄ࡜ࡔ࡯࠲߽ᒰὼࠦࡀ࡚ࠢࠪࡦ⏕┙ⷐ᳞ࡔ࠶޿ࠆ߽ߩߣߔࠆ‫ࠅ߹ߟޕ‬㧘ㅢᏱ⁁ᘒߢߪⒿേߒߡ޿ࠆ࠮࡯ࠫߦ฽߹ࠇ㧘ࠛࡦ࠼ࠪࠬ࠹ࡓ㧘ࡀ࠶࠻ࡢ࡯ࠢࡁ࡯࠼

3 ߟߩࠨ࡯ࡃߩ 1 ߟࠍࠬ࡝࡯ࡊ⁁ᘒߦߒߡ޿ࠆ㧔ಣℂߢಣℂߐࠇࠆ߽ߩߣߔࠆ‫ߚ߹ޕ‬㧘Ꮺၞߪਔᣇะหߓ୯߇

⽶⩄߇ᷫߞߚߚ߼㧕‫ࠅࠃߦࠇߎޕ‬㧘㔚ജ૶↪㊂ߪㅢᏱ⁁㪓䉬䊷䉴㪈㪕䉣䊮䊄䉲䉴䊁䊛㪘⊒ା஥䊉䊷䊄䋨䊉䊷䊄䋱䋩Setup䋨DA,T x)

Connect䋨flag䋩ਛ⛮䊉䊷䊄㪓䉬䊷䉴㪉㪕⌕ା஥䊉䊷䊄䋨䊉䊷䊄䋲䋩䉣䊮䊄䉣䊮䊄䉲䉴䊁䊛㪙 䉲䉴䊁䊛㪘

Setup
䋨DA,U䋱,Tx䋩

Setup
䋨DA,U1, Ut,Tx䋩

Setup
䋨DA,U䋱2,Tx䋩

Connect
䋨flag䋩

Connect
䋨flag䋩

Connect
䋨flag䋩

⊒ା஥䊉䊷䊄䋨䊉䊷䊄䋱䋩

Setup
䋨UA,T y)

ਛ⛮䊉䊷䊄

Setup
䋨UA,D䋱,Ty䋩㪁Connect
䋨flag䋩㪁 㪑㩷㩿㪛㪘㪂㪛㪙㪀㩷㪕㩷㪬㪈㪉 䈭䉌㔚ജ૶↪㊂೥ᷫ╷䉕䉣䊮䊄䉲䉴䊁䊛䈪Connect
䋨flag䋩

⌕ା஥䊉䊷䊄䋨䊉䊷䊄䋲䋩

Setup
䋨UA,D1,Dt,Ty䋩䉣䊮䊄䉲䉴䊁䊛㪙

Setup
䋨UA,D䋱2 ,Ty䋩
Connect
䋨flag䋩

Connect
䋨flag䋩㪁㪁 㪑㩷㩿㪬㪘㪂㪬㪙㪀㩷㪓㩷㪛㪈㪉 䈭䉌㔚ജ૶↪㊂೥ᷫ╷䉕䉣䊮䊄䉲䉴䊁䊛䈪ታᣉ䈚䇮㪽㫃㪸㪾䈮㵱㪈㵱䉕⸳ቯታᣉ䈚䇮㪽㫃㪸㪾䈮㵱㪈㵱䉕⸳ቯ㪓䉬䊷䉴㪊㪕䉣䊮䊄䉲䉴䊁䊛㪘⊒ା஥䊉䊷䊄䋨䊉䊷䊄䋱䋩Setupਛ⛮䊉䊷䊄Setup
䋨D䋱,Vx䋩

ConnectConnect
䋨UB䋬D䋱2, Vx䋩 䋨UB䋬D䋱2䋩㪁㪓䉬䊷䉴㪋㪕⌕ା஥䊉䊷䊄䋨䊉䊷䊄䋲䋩Setup
䋨D1,Dt ,Vx䋩
Connect
䋨UB䋬D䋱2䋩䉣䊮䊄䉣䊮䊄䉲䉴䊁䊛㪙 䉲䉴䊁䊛㪘

Setup
䋨D䋱2 ,Vx䋩
Connect
䋨UB䋩⊒ା஥䊉䊷䊄䋨䊉䊷䊄䋱䋩ਛ⛮䊉䊷䊄

Setup

Setup
䋨U䋱 ,Vy䋩

Connect
䋨DB,U䋱2,Vy䋩

Connect
䋨DB,U䋱2䋩⌕ା஥䊉䊷䊄
䋨䊉䊷䊄䋲䋩

䉣䊮䊄
䉲䉴䊁䊛㪙

Setup
䋨U1,Ut ,Vy䋩

Setup
䋨U䋱2 ,Vy䋩

Connect
䋨DB,U䋱2䋩

Connect
䋨DB䋩

Connect Ack Connect Ack
Connect Ack Connect Ack(flag)
䋨flag䋩
䋨flag䋩
䋨flag䋩

Connect Ack Connect Ack
Connect Ack Connect Ack(flag)
䋨flag䋩
䋨flag䋩
䋨flag䋩㪁㪁 㪑㩷㪛㪈㪉 㪕㩷㩿㪬㪘㪂㪬㪙㪀䈭䉌㔚ജ૶↪㊂೥ᷫ╷䉕䊈䉾䊃䊪䊷䉪䊉䊷䊄䈪㪁 㪑㩷㪬㪈㪉 㪓㩷㩿㪛㪘㪂㪛㪙㪀䈭䉌㔚ജ૶↪㊂೥ᷫ╷䉕䊈䉾䊃䊪䊷䉪䊉䊷䊄䈪ታᣉ䈚䇮㪽㫃㪸㪾䈮㵱㪈㵱䉕⸳ቯታᣉ䈚䇮㪽㫃㪸㪾䈮㵱㪈㵱䉕⸳ቯ㪑 䊃䊷䉺䊦㔚ജ૶↪㊂೥ᷫ╷䈱ታᣉ႐ᚲ࿑䋱䋮䉣䊮䊄䉲䉴䊁䊛஥䈫䊈䉾䊃䊪䊷䉪஥䈱ㅪ៤䉕೨ឭ䈫䈚䈢ធ⛯ାภ䉲䊷䉬䊮䉴଀࿑㧝㧚ࠛࡦ࠼ࠪࠬ࠹ࡓ஥ߣࡀ࠶࠻ࡢ࡯ࠢ஥ߩㅪ៤ࠍ೨ឭߣߒߚធ⛯ାภࠪ࡯ࠤࡦࠬ଀㧙㧙ᘒࠃࠅ߽ DA ߛߌዋߥߊߥߞߡ޿ࠆ‫ߚ߹ޕ‬㧘ᦨᄢഀࠅ䉣䊮䊄䉲䉴䊁䊛㪘㪓ㅢᏱ⁁ᘒ㪕ᒰߡน⢻ߥ⸘▚⢻ജߪ Wx ߣߔࠆ‫ޕ‬㵰Ⓙേਛ㵱䉰䊷䊋ԙ ᣂߚߥⷐ᳞߇⊒↢ߒ㧘⸘▚⢻ജࠍ Wx એ਄ᔅⷐߣߔ㪓⃻⁁ᘒ㪕㵰Ⓙേਛ㵱䉰䊷䊋㵰䉴䊥䊷䊒⁁ᘒ㵱䉰䊷䊋ࠆ႐ว㧘ࠬ࡝࡯ࡊ⁁ᘒߦߥߞߡ޿ࠆࠨ࡯ࡃࠍⒿേਛߦᚯߔᔅⷐ߇޽ࠆ‫ߡߞࠃߦࠇߘޕ‬㧘㔚ജ૶↪㊂߇ DA ߛ䊶Ⓙേਛ䉰䊷䊋䈱ᢙ 䋳䊶㔚ജ૶↪㊂㪰㪂㪛㪘䊶ᣂ䈢䈭ⷐ᳞䈮ഀ䉍ᒰ䈩น⢻䈭㪮 㩿㪕㪮㫏㪀ᦨᄢ⸘▚⢻ജߌჇടߔࠆߎߣߦߥࠆ‫ޕ‬ ߎߎߢ㧘ᣂߚߥⷐ᳞ߦഀࠅᒰߡࠆ⸘▚⢻ജࠍ Wx એਅߦߢ߈ࠇ߫㧘ࠬ࡝࡯ࡊ⁁ᘒߦߥߞߡ޿ࠆࠨ࡯ࡃࠍⒿേ䋲㪰㪮㫏࿑䋲䋮࿑䋱䉬䊷䉴䋱䈱ౕ૕଀䋨䉣䊮䊄䉲䉴䊁䊛A䈱⁁ᘒ䋩࿑㧞㧚࿑㧝ࠤ࡯ࠬ㧝ߩౕ૕⊛㧔ࠛࡦ࠼ࠪࠬ࠹ࡓ㧭ߩ⁁ᘒ㧕ਛߦᚯߔᔅⷐ߇ߥ޿ߚ߼㔚ജ૶↪㊂ߪჇടߒߥ޿㧔ઁ
ߩ 2 ߟߩࠨ࡯ࡃߪ߽ߣ߽ߣⒿേਛߢ޽ࠅ㧘ߘࠇࠍ૶↪
ߔࠆߛߌ㧕‫ޕ‬Ԛ ߘߩߚ߼㧘߽ߣ߽ߣⷐ᳞ߐࠇߚ⸘▚⢻ജ߇ Wx એ਄㪓ㅢᏱ⁁ᘒ㪕㪓⃻⁁ᘒ㪕⊒ା஥䊉䊷䊄ਛ⛮䊉䊷䊄㩿䊉䊷䊄㪈㪀㵰Ⓙേਛ㵱࿁✢⊒ା஥䊉䊷䊄ਛ⛮䊉䊷䊄㩿䊉䊷䊄㪈㪀㵰Ⓙേਛ㵱࿁✢ߩ႐วߦߪ㧘ࠛࡦ࠼ࠪࠬ࠹ࡓ A ߪᣂߚߥⷐ᳞ߦഀࠅᒰߡࠆ⸘▚⢻ജࠍ Wx એਅߦߔࠆ㔚ജ૶↪㊂೥ᷫ╷ࠍឭ᩺ߔࠆ㧔߽ߣ߽ߣⷐ᳞ߐࠇߚ⸘▚⢻ജߪ Wx એ਄ߣߔࠆ㧕‫ࠅ߹ߟޕ‬㧘DA ߛߌ೥ᷫߢ߈ࠆߣ⸒߃ࠆ‫ޕ‬ ⸘▚⢻ജࠍዊߐߊߔࠆߎߣߦࠃࠅ㧘ࠨ࡯ࡆࠬಣℂᤨ㑆㵰䉴䊥䊷䊒⁁ᘒ㵱࿁✢䊶Ⓙേਛ࿁✢䈱ᢙ䊶㔚ജ૶↪㊂䊶ᣂ䈢䈭ⷐ᳞䈮ഀ䉍ᒰ䈩น⢻䈭ᦨᄢᏪၞ䋳㪯㪂㪛㪈䋲㪯㪭 㩿㪕㪭㫏㪀

㪭㫏߇Ⴧടߔࠆ‫ߩߘޕ‬Ⴧടಽࠍ Tx ߣߔࠆ‫ࠢ࡯ࡢ࠻࠶ࡀޕ‬࿑䋳䋮࿑䋱䉬䊷䉴䋳䈱ౕ૕଀䋨⊒ା஥䊉䊷䊄䋱䋭ਛ⛮䊉䊷䊄㑆䋩࿑㧟㧚࿑㧝ࠤ࡯ࠬ㧟ߩౕ૕଀㧔⊒ା஥ࡁ࡯࠼㧝㧙ਛ⛮ࡁ࡯࠼㑆㧕ࠆ㔚ജ૶↪㊂㧔߽ߜࠈࠎჇടߒߥ޿႐ว߽޽ࠆ㧕ࠍ⸘A ߇ឭ᩺ߒߚ࠻࡯࠲࡞㔚ജ૶↪㊂ߩ೥ᷫ╷ࠍታᣉߖߕ㧘ࡁ࡯࠼ߪᏪၞࠍ Tx ಽߛߌ㐳ߊ଻ᜬߔࠆߎߣߢჇടߔ

flag=0 ࠍ⸳ቯߒߚ Connect ࡔ࠶࠮࡯ࠫࠍࡁ࡯࠼ 2 ߦㅍ▚ߔࠆߎߣ߇ߢ߈ࠆ‫ޕ‬ԛ ࠛࡦ࠼ࠪࠬ࠹ࡓ A ߪ㧘DA ߣ Tx ࠍࠦࡀ࡚ࠢࠪࡦ⏕┙ⷐ᳞ࡔ࠶࠮࡯ࠫ㧔Setup㧕ߦタߖߡ⊒ା஥ࡁ࡯࠼㧔ࡁ࡯࠼ 1㧕ߦㅍࠆ‫ޕ‬Ԝ ࡁ࡯࠼㧝ߪ㧘Ꮺၞࠍ Tx ಽߛߌ㐳ߊ଻ᜬߔࠆߎߣߢࠆ‫ޕ‬Ԡ ࡁ࡯࠼ 2㧘ਛ㑆ࡁ࡯࠼㧘ࡁ࡯࠼ 1 ߪ Connect ࡔ࠶࠮࡯ࠫࠍࠛࡦ࠼ࠪࠬ࠹ࡓ A ߦะߌਛ⛮ߔࠆ‫ޕ‬ԡ ࠦࡀ࡚ࠢࠪࡦ⏕┙ᔕ╵ࠍฃାߒߚࡁ࡯࠼ࠛࡦ࠼ࠪࠬჇടߔࠆ㔚ജ૶↪㊂ U1 ࠍ▚಴ߒ㧔U1=0 ߩ႐ว߽޽ࠆ㧕㧘DA㧘Tx ߣ৻✜ߦ Setup ࡔ࠶࠮࡯ࠫߦ฽߼ਛ⛮ࡁ࡯࠼ߦㅍࠆ‫ޕ‬ԝ ห᭽ߦ㧘ਛ⛮ࡁ࡯࠼ߪ Tx ࠍ߽ߣߦਛ⛮ࡁ࡯࠼ߢჇ

࠹ࡓ A ߪ flag=1 ߥࠄឭ᩺ߒߚ㔚ജ૶↪㊂೥ᷫ╷ࠍታᣉߒ㧘flag = 0 ߥࠄ೥ᷫ╷ࠍታᣉߒߥ޿‫ޕ‬ ߥ߅㧘࿑ 2 ߢߪⒿേਛࠨ࡯ࡃᢙߩჇᷫࠍ೨ឭᗐቯߒߚ߇㧘ࠨ࡯ࡃߩࠢࡠ࠶ࠢᢙჇᷫࠍ೨ឭߣߒߚ଀߽⠨߃ࠄࠇ㧘ടߔࠆ㔚ജ૶↪㊂ Ut ࠍ▚಴ߒ㧔Ut = 0 ߩ႐ว߽޽ࠆ㧕ࠆ‫ޕ‬࠼㧔ࡁ࡯࠼ 2㧕ߦㅍࠆ‫ޕ‬㧚 ࠤ࡯ࠬ㧞ߩౕ૕଀

㧘DA㧘U12
૶↪㊂ U2 ࠍ▚಴ߒ㧔U2 = 0 ߩ႐ว߽޽ࠆ㧕ߟ߹ࠅࠛࡦ࠼ࠪࠬ࠹ࡓ஥ߩ㔚ജ૶↪㊂ࠍჇടߐߖࠆ㧔ߎ

DA, U1, Tx ߣ৻✜ߦ Setup ࡔ࠶࠮࡯ࠫߦ฽߼⌕ା஥ࡁ࡯Ԟ ࡁ࡯࠼ 2 ߪ㧘Tx ࠍ߽ߣߦ⌕ାࡁ࡯࠼ߢჇടߔࠆ㔚ജ
㧔=U1 㧗 Ut 㧗 U2㧕㧘Tx ࠍ Setup ࡔ࠶࠮࡯ࠫߦ฽߼⌕ା஥ߩࠛࡦ࠼ࠪࠬ࠹ࡓ B ߦㅍࠆ‫ޕ‬ԟ ࠛࡦ࠼ࠪࠬ࠹ࡓ B ߪ㧘Tx ࠍ߽ߣߦ⥄りߢ೥ᷫߢ߈ࠆ㔚ജ૶↪㊂ DB㧔ࠛࡦ࠼ࠪࠬ࠹ࡓ㧭ߣหߓࠃ߁ߦಣℂ⢻ജࠍᛥ߃ࠆߎߣߢታ⃻㧕ࠍ▚಴ߔࠆ‫ޕ‬DB=0 ߩ႐ว߽ ࠤ࡯ࠬ 2 ߪឭ᩺ߔࠆ㔚ജ૶↪㊂೥ᷫ╷߇ࠤ࡯ࠬ 1 ߣㅒ㧘ࠇߦࠃߞߡࠨ࡯ࡆࠬಣℂᤨ㑆߇ Ty ߛߌ⍴❗㧕㧘એᄖߪࠤ࡯ࠬ 1 ߣ߶߷หߓᚻ㗅ߣߥࠆߚ߼㧘⹦⚦ߪ⋭⇛ߔࠆ‫ޕ‬㧚 ࠤ࡯ࠬ㧟ߩౕ૕଀Ԙ ߹ߕ㧘⊒ା஥ࡁ࡯࠼㧔ࡁ࡯࠼ 1㧕ߣਛ⛮ࡁ࡯࠼㑆ߪ

࿑ 3 ߦ␜ߔ⁁ᘒߦߥߞߡ޿ࠆ߽ߩߣߔࠆ‫ࠅ߹ߟޕ‬㧘ㅢ޽ࠆ‫ߡߒߘޕ‬㧘     ( D A + DB )U 12          (1)Ᏹ⁁ᘒߢߪⒿേߒߡ޿ࠆ 3 ᧄߩ࿁✢ 1 ᧄࠍࠬ࡝࡯ࡊ⁁ ߥࠄ߫ࠛࡦ࠼ࠪࠬ࠹ࡓ A ߇ឭ᩺ߒߚ࠻࡯࠲࡞㔚ജ૶↪

ᘒߦߒߡ޿ࠆ㧔࠻࡜ࡅ࠶ࠢ㊂߇ᷫߞߚߚ߼㧕‫ࠃߦࠇߎޕ‬ࠅ㧘㔚ജ૶↪㊂ߪㅢᏱ⁁ᘒࠃࠅ߽ D㧝ߛߌዋߥߊߥߞ

㊂ߩ೥ᷫ╷ࠍታᣉߒ㧘flag=1 ࠍ⸳ቯߒߚࠦࡀ࡚ࠢࠪࡦ⏕┙ᔕ╵ࡔ࠶࠮࡯ࠫ㧔Connect㧕ࠍࡁ࡯࠼ 2 ߦ㄰ାߔࠆ‫ޕ‬ㅒߦ㧘ᑼ(1)߇ᚑ┙ߒߥ޿႐วߪ㧘ࠛࡦ࠼ࠪࠬ࠹ࡓߡ޿ࠆ‫ߚ߹ޕ‬㧘ഀࠅᒰߡน⢻ߥᦨᄢᏪၞߪ Vx ߣߔࠆ‫ޕ‬ԙ ᣂߚߥⷐ᳞߇⊒↢ߒ㧘Ꮺၞࠍ Vx એ਄ᔅⷐߣߔࠆ႐㧙㧙ว㧘ࠬ࡝࡯ࡊ⁁ᘒߦߥߞߡ޿ࠆ࿁✢ࠍⒿേਛߦᚯߔᔅ೥ᷫ╷ࠍታᣉߒ㧘flag=0 ߥࠄ೥ᷫ╷ࠍታᣉߒߥ޿‫ޕ‬ⷐ߇޽ࠆ‫ߡߞࠃߦࠇߘޕ‬㧘㔚ജ૶↪㊂߇ D1 ߛߌჇടߔ ߥ߅㧘࿑ 3 ߢߪⒿേਛ࿁✢ᢙߩჇᷫࠍ೨ឭᗐቯߒߚ߇㧘ࠆߎߣߦߥࠆ‫ޕ‬࿁✢ㅦᐲჇᷫ㧔1Gb/s100Mb/s ߥߤ㧕ࠍ೨ឭߣߒߚ଀߽ ߎߎߢ㧘ᣂߚߥⷐ᳞ߦഀࠅᒰߡࠆᏪၞࠍ Vx એਅߦ⠨߃ࠄࠇࠆ‫ޕ‬ߢ߈ࠇ߫㧘ࠬ࡝࡯ࡊ⁁ᘒߦߥߞߡ޿ࠆ࿁✢ࠍⒿേਛߦᚯߔᔅⷐ߇ߥ޿ߚ߼㔚ജ૶↪㊂ߪჇടߒߥ޿㧔ઁߩ 2ߟߩ࿁✢ߪ߽ߣ߽ߣⒿേਛߢ޽ࠅ㧘ߘࠇࠍ૶↪ߔࠆߛߌ㧕‫ࠅ߹ߟޕ‬㧘D1 ߛߌ೥ᷫߢ߈ࠆߣ⸒߃ࠆ‫ޕ‬Ԛ ߘߩߚ߼㧘߽ߣ߽ߣⷐ᳞ߐࠇߚᏪၞ߇ Vx એ਄ߩ႐วߦߪ㧘⊒ା஥ࡁ࡯࠼㧔ࡁ࡯࠼ 1㧕ߪᣂߚߥⷐ᳞ߦഀ

ࠅᒰߡࠆᏪၞࠍ Vx એਅߦߔࠆ㔚ജ૶↪㊂೥ᷫ╷ࠍឭ㧟㧚㧠 ࠤ࡯ࠬ㧠ߩౕ૕଀ ࠤ࡯ࠬ 4 ߪឭ᩺ߔࠆ㔚ജ૶↪㊂ߩ೥ᷫ╷߇ࠤ࡯ࠬ 3 ߣㅒ㧘ߟ߹ࠅᏪၞࠍჇടߐߖࠆ㧔ߎࠇࠍ Vy ߣ⴫␜㧕ߎߣߦࠃࠅࡁ࡯࠼ߩ㔚ജ૶↪㊂ࠍჇടߐߖࠆ㧔ߎࠇߦࠃߞߡࠛ
ࡦ࠼ࠪࠬ࠹ࡓ㑆ߩ࠺࡯࠲ォㅍಣℂᤨ㑆߇⍴ߊߥࠆ㧕㧘એᄖߪࠤ࡯ࠬ 3 ߣ߶߷หߓᚻ㗅ߣߥࠆߚ߼㧘⹦⚦ߪ⋭⇛ߔࠆ‫ޕ‬᩺ߔࠆ‫ޕ‬Ꮺၞࠍዊߐߊߔࠆߎߣߦࠃࠅ㧘ࠛࡦ࠼ࠪࠬ࠹ࡓ㑆ߩ࠺࡯࠲ォㅍᤨ㑆߇㐳ߊߥࠅ㧘ߘߩ⚿ᨐࠛࡦ࠼ࠪ㧠㧚߻ߔ߮ࠬ࠹ࡓߩ㔚ജ૶↪㊂߇Ⴧടߔࠆน⢻ᕈ߇޽ࠆ‫ޕ‬ԛ ⊒ା஥ߩࠛࡦ࠼ࠪࠬ࠹ࡓ A ߆ࠄࠦࡀ࡚ࠢࠪࡦ⏕┙ⷐ ᧄⓂߢߪ,ᣢߦឭ᩺ߒߚࠛࡦ࠼ࠪࠬ࠹ࡓ஥ߣࡀ࠶࠻ࡢ᳞ࡔ࠶࠮࡯ࠫ㧔Setup㧕ࠍฃାߒߚࡁ࡯࠼㧝ߪ㧘Ꮺၞߩ࡯ࠢ஥ߢㅪ៤ߔࠆߎߣߢ࠻࡯࠲࡞ߩ㔚ജ૶↪㊂ࠍ೥ᷫߢ೥ᷫߦࠃࠆ㔚ജ૶↪㊂೥ᷫ╷ࠍឭ᩺ߔࠆ‫ޕ‬Ꮺၞߩ೥ᷫ߈ࠆᣇᑼࠍታ⃻ߔࠆߚ߼ߩធ⛯ାภࠪ࡯ࠤࡦࠬߩౕ૕଀

ߦࠃࠆࡁ࡯࠼ 1 ߩ㔚ജ૶↪㊂೥ᷫಽ D1 ࠍ▚಴ߔࠆ‫ߘޕ‬ࠍ᣿ࠄ߆ߦߒߚ‫ޕ‬ߒߡ㧘Ꮺၞߩ೥ᷫ୯ Vx ߣ৻✜ߦ Setup ࡔ࠶࠮࡯ࠫߦ฽ ੹࿁ߪ 1 ߟ 1 ߟߩⷐ᳞Ფߦ್ᢿߔࠆߎߣࠍ೨ឭߣߒߡ߼ਛ⛮ࡁ࡯࠼ߦㅍࠆ‫ޕ‬޿ࠆ߇㧘ⶄᢙߩ࡙࡯ࠩ߿ⶄᢙߩⷐ᳞ߦࠃࠅ⾗Ḯߪ౒↪ߐԜ ห᭽ߦ㧘ਛ⛮ࡁ࡯࠼ߪ Vx ࠍ߽ߣߦਛ⛮ࡁ࡯࠼ߩ㔚ࠇࠆߩ߇৻⥸⊛ߢ޽ࠆ‫੹ޕ‬ᓟߪߘࠇࠍ⠨ᘦߒߚធ⛯ାภജ૶↪㊂೥ᷫಽ Dt ࠍ▚಴ߒ
㧔Dt =0 ߩ႐ว߽޽ࠆ㧕㧘
D1㧘ࠪ࡯ࠤࡦࠬࠍᬌ⸛ߔࠆᔅⷐ߇޽ࠆ‫ߚ߹ޕ‬㧘੹࿁ߪ 1㧦1

࡯࠼ 2㧕ߦㅍࠆ‫ޕ‬ᣇะ࠻࡜ࡅ࠶ࠢ㊂ߩࠕࡦࡃ࡜ࡦࠬ㧔 ᣇะㅢା߽฽߻㧕Vx ߣ৻✜ߦ Setup ࡔ࠶࠮࡯ࠫߦ฽߼⌕ା஥ࡁ࡯࠼㧔ࡁԝ ࡁ࡯࠼ 2 ߪ㧘Vx ࠍ߽ߣߦࡁ࡯࠼ 2 ߩ㔚ജ૶↪㊂೥ᷫ

ធ⛯ᒻᘒࠍ೨ឭߣߒߚ߇㧘਄ࠅᣇะ࠻࡜ࡅ࠶ࠢ㊂ߣਅࠅߥᒻᘒ㧘ࡑ࡞࠴ࡐࠗࡦ࠻ធ⛯ᒻᘒ㧘ⶄᢙࡀ࠶࠻ࡢ࡯ࠢ⚻ಽ D2 ࠍ▚಴ߒ㧔D2=0 ߩ႐ว߽޽ࠆ㧕㧘D12㧔=D1㧗Dt↱ᒻᘒ㧘ߥߤࠍ೨ឭߣߒߚᬌ⸛߇੹ᓟᔅⷐߢ޽ࠆ‫ޕ‬࠹ࡓ㧮ߦㅍࠆ‫߅ߥޕ‬㧘ࡁ࡯࠼ 2 ߪ D12 ࠍ৻ᤨ⊛ߦ଻ᜬ‫ޣ‬ෳ⠨ᢥ₂‫ޤ‬

㧗D2㧕ࠍ Setup ࡔ࠶࠮࡯ࠫߦ฽߼⌕ା஥ߩࠛࡦ࠼ࠪࠬߔࠆ‫ޕ‬Ԟ ࠛࡦ࠼ࠪࠬ࠹ࡓ B ߪ㧘Vx ࠍ߽ߣߦ㔚ജ૶↪㊂Ⴧട(1) ⚻ᷣ↥ᬺ⋭㧘̌ࠣ࡝࡯ࡦ IT ࠗ࠾ࠪࠕ࠹ࠖࡉ̍㧘ᐔᚑ 19ࡦ࠼ࠪࠬ࠹ࡓ㑆ߩ࠺࡯࠲ォㅍᤨ㑆߇㐳ߊߥࠆߚ߼㧕‫ޕ‬(2) ࠣ࡝࡯ࡦ㧵㨀ផㅴද⼏ળ㧘̌ࡐࠬ࠻੩ㇺߦ᜸߻ᣣᧄߩಽ UB ࠍ▚಴ߔࠆ㧔Ꮺၞࠍዊߐߊߔࠆߎߣߦࠃࠅ㧘ࠛ

UB=0 ߩ႐ว߽޽ࠆ‫ߡߒߘޕ‬㧘Connect ࡔ࠶࠮࡯ࠫߦ฽߼ߡࡁ࡯࠼ 2 ߦ㄰ାߔࠆ‫ޕ‬ԟ ࡁ࡯࠼ 2 ߪ଻ᜬߒߡ޿ߚ D12 ߣ৻✜ߦ UB ࠍ Connect

ᐕ 12 ᦬ 6 ᣣࠣ࡝࡯ࡦ㧵㨀̍㧘ࠣ࡝࡯ࡦ㧵㨀ࡈࠜ࡯࡜ࡓ (2009.3)(3) ITU Symposium on ̌ ICTs and Climate Change ̍Summary Report, London, June 17&18,2008

http://www.itu.int/dms_pub/itu-t/oth/06/0F/T060F00600

ࡔ࠶࠮࡯ࠫߦ฽߼ߡਛ⛮ࡁ࡯࠼⚻↱ߢࡁ࡯࠼ 1 ߦㅍࠆ‫ޕ‬Ԡ ࡁ࡯࠼㧝ߪ D12㧘UB㧘Vx ࠍ฽߻ Connect ࡔ࠶࠮࡯ࠫࠍࠛࡦ࠼ࠪࠬ࠹ࡓ㧭ߦㅍࠆ‫ޕ‬ԡ ࠛࡦ࠼ࠪࠬ࠹ࡓ A ߪ㧘ࠛࡦ࠼ࠪࠬ࠹ࡓ B ߣห᭽ߦߘߒߡ㧘Vx ࠍ߽ߣߦ㔚ജ૶↪㊂Ⴧടಽ UA ࠍ▚಴ߔࠆ‫ޕ‬    D12 > 㧔UA㧗UB㧕          㧔2㧕ߥࠄ߫㧘ࠛࡦ࠼ࠪࠬ࠹ࡓ A ߪ flag=1 ࠍ⸳ቯߒߚ Connect

90001PDFE.pdf(4) ⇗ጊ㧘㐳ฬ㧘ᩙᨋ㧘̌ࠛࡦ࠼ࠪࠬ࠹ࡓߣࡀ࠶࠻ࡢ࡯ࠢߩㅪ៤ߦࠃࠆ㔚ജ૶↪㊂೥ᷫ╷ߩឭ᩺̍㧘ᖱႎಣℂቇળ ⎇ⓥႎ๔ 2006-DPS-137 㧔2008.11㧕

(5) ᩙᨋ,㐳ฬ,̌ࠛࡦ࠼ࠪࠬ࠹ࡓߣࡀ࠶࠻ࡢ࡯ࠢߩㅪ៤ߦ
ࠃࠆ࠻࡯࠲࡞㔚ജ૶↪㊂೥ᷫᴺߩታ⃻ᣇᑼ”, 㔚ሶ

Ack ࡔ࠶࠮࡯ࠫࠍࡁ࡯࠼ 1 ߦㅍࠆ‫ޕ‬

Ԣ Connect Ack ࡔ࠶࠮࡯ࠫࠍฃାߒߚࡁ࡯࠼ 1㧘ਛ⛮ࡁ࡯࠼㧘ࡁ࡯࠼ 2 ߪ㧘flag=1 ߥࠄឭ᩺ߒߚ㔚ജ૶↪㊂ߩᖱႎㅢାቇળ ᖱႎࡀ࠶࠻ࡢ࡯ࠢ⎇ⓥળ IN2009-27
(2009.7)

(6) K. Hatakeyama, Y. Osana and S. Kuribayashi, “ Reducing㧙㧙total energy consumption with collaboration between
network and end systems,”NBiS2009, 7B-4, Aug. 2009.

㧙㧙