The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
현재 전 세계적으로 수많은 LAN 스위치가 사용되고 있습니다. 따라서 이러한 장치의 에너지 소비를 줄일 수 있는 방법은 실질적인 관심을 끌고 있습니다. LAN 스위치에서 전력을 절약하는 간단한 방법은 버퍼링된 패킷이 없을 때 인터페이스를 절전 모드로 전환하고 전송할 패킷이 있는 동안 인터페이스를 활성 모드로 유지하는 것입니다. 이것이 가장 효과적인 에너지 절약 방식인 것처럼 보이지만 모드 전환은 돌입 전류를 발생시켜 장치에 전기적 손상을 일으킬 수 있습니다. 이 문제는 과도한 모드 전환으로 인해 발생하므로 피해야 합니다. 따라서, 에너지 효율에는 크게 기여하지 않지만 장치에 손상을 줄 수 있는 짧은 시간의 슬립 모드를 초래하는 모드 전환 횟수를 줄이는 방법을 개발하는 것이 주요 목표입니다. 이를 위해 모든 패킷이 버퍼에서 플러시된 후 인터페이스가 "추가" 기간 동안 활성 모드로 유지되는 방법이 채택되었습니다. 이 기간은 "추가 활성 기간(EAP)"이며 이 방식은 에너지 절약 효율성을 희생하여 장치를 보호합니다. 본 논문에서는 M/M/1 및 IPP/M/1 큐잉 모델을 수정하여 이 방식을 전력 감소 비율과 모드 변경 빈도 측면에서 분석적으로 평가합니다. 수치 결과는 추가 활성 기간의 지속 시간이 모드 변경 횟수를 줄이면서 에너지 절약 성능을 저하시키는 방법을 보여줍니다. 우리는 포아송 패킷 도착을 사용하는 EAP 모델에서 전력 감소율과 평균 턴온 수 사이의 정확한 균형을 분석적으로 보여줍니다. 또한, 인터페이스의 단기 활용에 따라 동적으로 적응적으로 EAP를 결정하는 방식을 확장하고 시뮬레이션을 통해 확장된 방식의 효율성을 입증합니다. 새로 개발된 방식을 사용하면 장치의 제약을 초과하지 않고 에너지 절약을 염두에 두고 LAN 스위치를 설계할 수 있습니다.
절전, 랜 스위치, 수면 조절, 대기열 분석, 활성화 인스턴스 수
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Hitomi TAMURA, Ritsuko TOMIHARA, Yutaka FUKUDA, Kenji KAWAHARA, Yuji OIE, "Energy Saving Scheme with an Extra Active Period for LAN Switches" in IEICE TRANSACTIONS on Communications,
vol. E93-B, no. 12, pp. 3542-3554, December 2010, doi: 10.1587/transcom.E93.B.3542.
Abstract: An immense number of LAN switches are currently in use worldwide. Therefore, methods that can reduce the energy consumption of these devices are of great practical interest. A simple way to save power in LAN switches is to switch the interfaces to sleep mode when no packets are buffered and to keep the interfaces in active mode while there are packets to be transmitted. Although this would appear to be the most effective energy saving scheme, mode switching gives rise to in-rush current, which can cause electrical damage to devices. This problem arises from excessive mode switching, which should be avoided. Thus, the main objective is to develop a method by which to reduce the number of mode switchings that result in short-duration sleep modes because these switchings do not contribute greatly to energy efficiency but can damage the device. To this end, a method is adopted whereby the interface is kept in active mode for an "extra" period of time after all packets have been flushed from the buffer. This period is the "extra active period (EAP)" and this scheme protects the device at the expense of energy saving efficiency. In this paper, this scheme is evaluated analytically in terms of its power reduction ratio and frequency of mode changes by modifying the M/M/1 and IPP/M/1 queuing models. The numerical results show how the duration of the extra active period degrades the energy saving performance while reducing the number of mode changes. We analytically show an exact trade-off between the power reduction ratio and the average number of turn-ons in the EAP model with Poisson packet arrival. Furthermore, we extend the scheme to determine the EAP dynamically and adaptively depending on the short-term utilization of the interface and demonstrate the effectiveness of the extended scheme by simulation. The newly developed scheme will enable LAN switches to be designed with energy savings in mind without exceeding the constraints of the device.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E93.B.3542/_p
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@ARTICLE{e93-b_12_3542,
author={Hitomi TAMURA, Ritsuko TOMIHARA, Yutaka FUKUDA, Kenji KAWAHARA, Yuji OIE, },
journal={IEICE TRANSACTIONS on Communications},
title={Energy Saving Scheme with an Extra Active Period for LAN Switches},
year={2010},
volume={E93-B},
number={12},
pages={3542-3554},
abstract={An immense number of LAN switches are currently in use worldwide. Therefore, methods that can reduce the energy consumption of these devices are of great practical interest. A simple way to save power in LAN switches is to switch the interfaces to sleep mode when no packets are buffered and to keep the interfaces in active mode while there are packets to be transmitted. Although this would appear to be the most effective energy saving scheme, mode switching gives rise to in-rush current, which can cause electrical damage to devices. This problem arises from excessive mode switching, which should be avoided. Thus, the main objective is to develop a method by which to reduce the number of mode switchings that result in short-duration sleep modes because these switchings do not contribute greatly to energy efficiency but can damage the device. To this end, a method is adopted whereby the interface is kept in active mode for an "extra" period of time after all packets have been flushed from the buffer. This period is the "extra active period (EAP)" and this scheme protects the device at the expense of energy saving efficiency. In this paper, this scheme is evaluated analytically in terms of its power reduction ratio and frequency of mode changes by modifying the M/M/1 and IPP/M/1 queuing models. The numerical results show how the duration of the extra active period degrades the energy saving performance while reducing the number of mode changes. We analytically show an exact trade-off between the power reduction ratio and the average number of turn-ons in the EAP model with Poisson packet arrival. Furthermore, we extend the scheme to determine the EAP dynamically and adaptively depending on the short-term utilization of the interface and demonstrate the effectiveness of the extended scheme by simulation. The newly developed scheme will enable LAN switches to be designed with energy savings in mind without exceeding the constraints of the device.},
keywords={},
doi={10.1587/transcom.E93.B.3542},
ISSN={1745-1345},
month={December},}
부
TY - JOUR
TI - Energy Saving Scheme with an Extra Active Period for LAN Switches
T2 - IEICE TRANSACTIONS on Communications
SP - 3542
EP - 3554
AU - Hitomi TAMURA
AU - Ritsuko TOMIHARA
AU - Yutaka FUKUDA
AU - Kenji KAWAHARA
AU - Yuji OIE
PY - 2010
DO - 10.1587/transcom.E93.B.3542
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E93-B
IS - 12
JA - IEICE TRANSACTIONS on Communications
Y1 - December 2010
AB - An immense number of LAN switches are currently in use worldwide. Therefore, methods that can reduce the energy consumption of these devices are of great practical interest. A simple way to save power in LAN switches is to switch the interfaces to sleep mode when no packets are buffered and to keep the interfaces in active mode while there are packets to be transmitted. Although this would appear to be the most effective energy saving scheme, mode switching gives rise to in-rush current, which can cause electrical damage to devices. This problem arises from excessive mode switching, which should be avoided. Thus, the main objective is to develop a method by which to reduce the number of mode switchings that result in short-duration sleep modes because these switchings do not contribute greatly to energy efficiency but can damage the device. To this end, a method is adopted whereby the interface is kept in active mode for an "extra" period of time after all packets have been flushed from the buffer. This period is the "extra active period (EAP)" and this scheme protects the device at the expense of energy saving efficiency. In this paper, this scheme is evaluated analytically in terms of its power reduction ratio and frequency of mode changes by modifying the M/M/1 and IPP/M/1 queuing models. The numerical results show how the duration of the extra active period degrades the energy saving performance while reducing the number of mode changes. We analytically show an exact trade-off between the power reduction ratio and the average number of turn-ons in the EAP model with Poisson packet arrival. Furthermore, we extend the scheme to determine the EAP dynamically and adaptively depending on the short-term utilization of the interface and demonstrate the effectiveness of the extended scheme by simulation. The newly developed scheme will enable LAN switches to be designed with energy savings in mind without exceeding the constraints of the device.
ER -