自适应延迟感知的光无线混合宽带接入网节能机制

利用数据的延迟容忍特性,提出了一种自适应延迟感知光无线混合网络节能机制.为了充分利用数据的延迟容忍度,网关动态地感知数据的到达率,采用排队模型来分析网关能耗和数据延迟,从而自适应地选择休眠周期;同时,采用多网关均衡负载机制来减小网关休眠带来的路径重建延迟和拥塞,从而减小因休眠而增加的延迟.结果表明,所提出的机制可降低网关总能耗36%,并有效提高网关利用率,降低网络中数据的路径延迟.

Adaptive Energy Saving Mechanism with Delay Aware in Hybrid Optical Wireless Broadband Access Networks

Abstract： Gateway utilization is low in hybrid optical wireless broadband access networks. Therefore, the energy efficiency can be effectively enhanced by employing the gateway sleep scheduling mechanism at the expense of increasing the system delay. In this paper, a novel adaptive energy saving mechanism with delay aware in hybrid optical wireless broadband access networks was proposed based on the delay tolerance feature of data. In order to fully exploit the delay tolerance feature of data, and to adaptively determine the sleeping interval according to arrival rate, the queuing theory model was introduced to analyse the energy consumption and the data gateway latency. Meanwhile, to achieve the energy efficiency, the path reconstruction delay and congestion rate were dramatically reduced by the proposed multi gateway load balance mechanism. The results show that the proposed mechanism can reduce the total energy consumption of gateways by 36%. Besides, the utilization rate of the gateway is effectively improved and the path delay is reduced.