数据中心网络的节能路由算法大体可分为流量感知和拓扑感知两大类.前者性能的好坏很大程度取决于流量矩阵预判的准确性.由于实际网络流量动态、随机产生,具有突发性,预判流量矩阵不一定与网络实时流量状态相符,因此,这类算法往往难以保...数据中心网络的节能路由算法大体可分为流量感知和拓扑感知两大类.前者性能的好坏很大程度取决于流量矩阵预判的准确性.由于实际网络流量动态、随机产生,具有突发性,预判流量矩阵不一定与网络实时流量状态相符,因此,这类算法往往难以保证突发流的可靠传输.而后者在休眠冗余设备时,仅从保证网络拓扑具有某种程度的连通性出发,并未考虑网络负载情况,可能导致低负载时设备空闲率较高,节能效果有限.为此,针对fat-tree拓扑的软件定义数据中心网络(software-defined data center network,SDCN),将网络流量因素引入拓扑感知节能路由机制,提出等效节点、最小网络连通子集、孤岛交换机、无效链路等概念以及辅助图模型和SDCN连通条件,给出多约束节能路由优化模型,同时还提出一种多约束节能路由算法(multi-constrained energy-saving routing,MER).MER算法在保证数据流的时延和可靠性要求前提下,尽可能多地休眠冗余交换机和链路,以降低网络能耗.最后,通过Mininet和Floodlight进行仿真测试.仿真结果表明:与文献中已有算法相比,MER具有更低的平均分组时延和丢包率,并且可以达到理想的节能效果.展开更多
Wireless Sensor Network (Wireless Sensor Network, WSN) is a self-organizing<span style="font-family:;" "=""> network formed by a large number of wireless sensor nodes through radio commu...Wireless Sensor Network (Wireless Sensor Network, WSN) is a self-organizing<span style="font-family:;" "=""> network formed by a large number of wireless sensor nodes through radio communication </span><span style="font-family:" color:#943634;"=""><a href="#ref1">[1]</a></span><span></span><span><span></span></span><span style="font-family:;" "="">. The sensor nodes in the network cooperate with each other to monitor and collect the object information in the observation area, and the information is transmitted to the users who need this information after data fusion processing. It is often deployed in harsh environments</span><span style="font-family:;" "="">,</span><span style="font-family:;" "=""> such as oceans, dee</span><span style="font-family:Verdana;"></span><span style="font-family:;" "="">p forests, and deserts. At the same time, the sensor nodes in the network are powered by batteries</span><span> <span></span></span><span style="font-family:" color:#943634;"=""><a href="#ref2">[2]</a></span><span></span><span><span></span></span><span style="font-family:;" "="">. These external factors make it impossible to replace batteries manually. Therefore, energy is an important resource for wireless sensor networks</span><span> <span></span></span><span style="font-family:" color:#943634;"=""><a href="#ref3">[3]</a></span><span></span><span><span></span></span><span style="font-family:;" "="">. In this paper, aiming at the problems of LEACH inter-cluster communication, from the perspective of energy saving, an improved strategy using inter-cluster ring routing is proposed. This strategy first abstracts all sensor nodes into a ring system model during the network topology formation stage. In the data transmission stage, a ring transmission strategy is adopted, and nodes on the ring are used to randomly and evenly undertake data transmission tasks, so the imbalance of energy consumption of sensor nodes can be effectively reduced. Simulation experiments show that this strategy can extend the network life cycle t展开更多
According to the high operating costs and a large number of energy waste in the current data center network architectures, we propose a kind of trusted flow preemption scheduling combining the energy-saving routing me...According to the high operating costs and a large number of energy waste in the current data center network architectures, we propose a kind of trusted flow preemption scheduling combining the energy-saving routing mechanism based on typical data center network architecture. The mechanism can make the network flow in its exclusive network link bandwidth and transmission path, which can improve the link utilization and the use of the network energy efficiency. Meanwhile, we apply trusted computing to guarantee the high security, high performance and high fault-tolerant routing forwarding service, which helps improving the average completion time of network flow.展开更多
文摘数据中心网络的节能路由算法大体可分为流量感知和拓扑感知两大类.前者性能的好坏很大程度取决于流量矩阵预判的准确性.由于实际网络流量动态、随机产生,具有突发性,预判流量矩阵不一定与网络实时流量状态相符,因此,这类算法往往难以保证突发流的可靠传输.而后者在休眠冗余设备时,仅从保证网络拓扑具有某种程度的连通性出发,并未考虑网络负载情况,可能导致低负载时设备空闲率较高,节能效果有限.为此,针对fat-tree拓扑的软件定义数据中心网络(software-defined data center network,SDCN),将网络流量因素引入拓扑感知节能路由机制,提出等效节点、最小网络连通子集、孤岛交换机、无效链路等概念以及辅助图模型和SDCN连通条件,给出多约束节能路由优化模型,同时还提出一种多约束节能路由算法(multi-constrained energy-saving routing,MER).MER算法在保证数据流的时延和可靠性要求前提下,尽可能多地休眠冗余交换机和链路,以降低网络能耗.最后,通过Mininet和Floodlight进行仿真测试.仿真结果表明:与文献中已有算法相比,MER具有更低的平均分组时延和丢包率,并且可以达到理想的节能效果.
文摘Wireless Sensor Network (Wireless Sensor Network, WSN) is a self-organizing<span style="font-family:;" "=""> network formed by a large number of wireless sensor nodes through radio communication </span><span style="font-family:" color:#943634;"=""><a href="#ref1">[1]</a></span><span></span><span><span></span></span><span style="font-family:;" "="">. The sensor nodes in the network cooperate with each other to monitor and collect the object information in the observation area, and the information is transmitted to the users who need this information after data fusion processing. It is often deployed in harsh environments</span><span style="font-family:;" "="">,</span><span style="font-family:;" "=""> such as oceans, dee</span><span style="font-family:Verdana;"></span><span style="font-family:;" "="">p forests, and deserts. At the same time, the sensor nodes in the network are powered by batteries</span><span> <span></span></span><span style="font-family:" color:#943634;"=""><a href="#ref2">[2]</a></span><span></span><span><span></span></span><span style="font-family:;" "="">. These external factors make it impossible to replace batteries manually. Therefore, energy is an important resource for wireless sensor networks</span><span> <span></span></span><span style="font-family:" color:#943634;"=""><a href="#ref3">[3]</a></span><span></span><span><span></span></span><span style="font-family:;" "="">. In this paper, aiming at the problems of LEACH inter-cluster communication, from the perspective of energy saving, an improved strategy using inter-cluster ring routing is proposed. This strategy first abstracts all sensor nodes into a ring system model during the network topology formation stage. In the data transmission stage, a ring transmission strategy is adopted, and nodes on the ring are used to randomly and evenly undertake data transmission tasks, so the imbalance of energy consumption of sensor nodes can be effectively reduced. Simulation experiments show that this strategy can extend the network life cycle t
基金supported by the National Natural Science Foundation of China(The key trusted running technologies for the sensing nodes in Internet of things: 61501007The outstanding personnel training program of Beijing municipal Party Committee Organization Department (The Research of Trusted Computing environment for Internet of things in Smart City: 2014000020124G041
文摘According to the high operating costs and a large number of energy waste in the current data center network architectures, we propose a kind of trusted flow preemption scheduling combining the energy-saving routing mechanism based on typical data center network architecture. The mechanism can make the network flow in its exclusive network link bandwidth and transmission path, which can improve the link utilization and the use of the network energy efficiency. Meanwhile, we apply trusted computing to guarantee the high security, high performance and high fault-tolerant routing forwarding service, which helps improving the average completion time of network flow.
