Wake Transition Decision algorithm for energy saving in OBS network with LPI

Abstract

The Low Power Idle (LPI) has been proposed by IEEE 802.3az Task Force to reduce energy consumption of network devices. Recently, many researches about the LPI have been progressing to maximize the sleep time and improve the performance of energy saving. However, most researches have not considered the effect of transition which causes additional energy consumption. The transition is a serious factor, which affect the performance of energy saving and QoS. Therefore, in this paper, we propose novel algorithms, called Wake Transition Decision(WTD) algorithms to reduce unnecessary transition in an OBS edge router with LPI. The Fixed Time based WTD algorithm(FT-WTD) reduces transition by waiting certain time before sleep transition. The Burst Length based WTD algorithm(BL-WTD) controls the unnecessary transition by keeping the active state of Tx module in an OBS edge router when burst length exceeds certain threshold.Simulation results show that not only approximately 30% of energy consumption can be decreased compared with exist LPI approach but also packet delay is kept within acceptable level by proposed algorithm.

Transferências de Dados em Massa Sensíveis ao Consumo Energético em Redes Ópticas Elásticas

“…O crescente número de soluções propostas na literatura para lidar com o desafio da eficiência energética exploram principalmente a aplicação da técnica de sleep mode [Tafani et al 2012, Kang et al 2012, Khumalo and Nleya 2018 e grafo auxiliar [Costa and Drummond 2018]. Em [Tafani et al 2012]é definido o limite de consumo em 30%, aproximadamente, quando um nó está no modo de espera.…”

“…Já em [Kang et al 2012], considera-se o limite de 10% do consumo total, bem como o consumo durante as transições do estado wake para sleep. Se o tempo de transição (0.45 ms adotados pelos autores) for maior do que o tempo no qual o nó ficará em modo de espera, então o modo sleep gerará desperdício de energia, já que a transiçãoé também consumidora.…”

“…Para que haja eficiência energética em uma redeóptica, ao entrar em sleep mode, o consumo dos nós de comutaçãoópticaé reduzido, conforme Equação 8 para valores que oscilam entre 10% [Kang et al 2012] e 30% [Tafani et al 2012] da capacidade total.…”

Energy Efficient Waveband Translucent Optical Burst Switching Network

“…Zaiter, et al [10] the author recommends increasing the size of the data burst in the OBS network for further energy efficiency in the optical network. Kang, et al [11] proposed a strategy to improve energy provision efficiency by reducing the number of unnecessary transitions. Zaiter, et al [12] proposed a new strategy for Energy improvement known as Parallel Optical Burst Switching (POBS) networks.…”