Now in modern telecommunication, one of the big topic research is a Vehicle Ad-hoc Network “VANET” (V2V). This topic is one of an “issues of the day” because research has problematic topic due to its many applicat...Now in modern telecommunication, one of the big topic research is a Vehicle Ad-hoc Network “VANET” (V2V). This topic is one of an “issues of the day” because research has problematic topic due to its many application-questions, what we need to solve: avoid collisions, any accidents on a way, and notifications about congestions on the road, available car parking, road-side commercial-business ads, and etcetera. These like application forms creating big delay constraining’s i.e. the instant data should reach the destination within certain time limits. Therefore, we need a really efficient stable clustering method and routing in vehicle ad-hoc network which will be resistant to network delays and meets network requirements. The methods are proposed in the paper for optimization VANETs data traffic as well as to minimizing delay. First, here is presented, a stable clustering algorithm based on the destination, contextually take into consideration various physical parameters for cluster formation such as location of the vehicle and its direction, vehicle speed and destination, as well as a possible list of interests of the vehicle. And also the next main process is to depend on these “five parameters” we can calculate the “Cluster Head Eligibility” of each car. Second, based on this “Cluster Head Eligibility”, described cluster head selection method. Third, for efficient communication between clusters, present a routing protocol based on the “destination”, which considered an efficient selecting method of next forwarding nodes, which is calculated by using “FE” metric.展开更多
该文主要面向上行汇聚流量为主的传感器网络应用场景,针对现有优化方案在灵活性和计算开销等方面的问题进行了分析,包括优化目标单一、节能方法对于多重寿命标准难以适应、计算复杂度与求解近似比难以取舍、环境突变或管理需求的调整无...该文主要面向上行汇聚流量为主的传感器网络应用场景,针对现有优化方案在灵活性和计算开销等方面的问题进行了分析,包括优化目标单一、节能方法对于多重寿命标准难以适应、计算复杂度与求解近似比难以取舍、环境突变或管理需求的调整无法快速响应等等,对当前流行的传感器硬件进行了数据收发的功耗测试后,根据其射频耗能特性,以提高网络可靠性的最小化"最大链路利用率"和单纯功耗优化的最小化"网络连通支配集"为优化目标,引入加权绿色因子,建立了功耗和性能可以调节的模型RES-WSN(Reliability and Energy Steerable WSN).该模型的求解复杂度较低,当网络有数百个节点时,问题依然可以较快求解,为传感器网络提供了一种在能量消耗和可靠性及多重寿命准则间柔性调节的方案.根据该文方案求得的路由关系和数据流传输的分配结果,以"Multiple Instances"的思路和拓展选项的方式在RPL路由协议的基础上给出了部署方案.通过实验验证,该文模型对网络的可靠性的调控比例最高为52.08%,对能量消耗的调控比例最高为60.51%,特别是在仅考虑节能优化且允许部分节点死亡的情况下,网络存活时间相比只考虑可靠性的情况延长了42.54%,与近期相关研究"MinST"模型相比延长了9.23%～15.38%.展开更多
在无线传感器网络中,节点能量有限且一般没有能量补充,因此如何减少节点的能量消耗成为路由协议的研究目标。文中提出一种基于簇头预测和功率控制的节能路由算法CHFPC(Cluster Head Forecasting andPower Controlling),该算法利用能量...在无线传感器网络中,节点能量有限且一般没有能量补充,因此如何减少节点的能量消耗成为路由协议的研究目标。文中提出一种基于簇头预测和功率控制的节能路由算法CHFPC(Cluster Head Forecasting andPower Controlling),该算法利用能量和距离参数对簇头进行预测,并将功率控制这一机制引入分簇路由和数据传输的过程中,从而使节点的平均能耗降低。最后用OMNeT++仿真的结果表明所提出的方案在网络生存时间和网络总剩余能量指标上比LEACH算法分别提高23%和15%,而且节点生命周期也明显长于LEACH算法。展开更多
In this paper, an optimal resource allocation strategy is proposed to enhance traffic dynamics in complex networks. The network resources are the total node packet-delivering capacity and the total link bandwidth. An ...In this paper, an optimal resource allocation strategy is proposed to enhance traffic dynamics in complex networks. The network resources are the total node packet-delivering capacity and the total link bandwidth. An analytical method is developed to estimate the overall network capacity by using the concept of efficient betweenness （ratio of algorithmic betweenness and local processing capacity）. Three network structures （scale-free, small-world, and random networks） and two typical routing protocols （shortest path protocol and efficient routing protocol） are adopted to demonstrate the performance of the proposed strategy. Our results show that the network capacity is reversely proportional to the average path length for a particular routing protocol and the shortest path protocol can achieve the largest network capacity when the proposed resource allocation strategy is adopted.展开更多
文摘Now in modern telecommunication, one of the big topic research is a Vehicle Ad-hoc Network “VANET” (V2V). This topic is one of an “issues of the day” because research has problematic topic due to its many application-questions, what we need to solve: avoid collisions, any accidents on a way, and notifications about congestions on the road, available car parking, road-side commercial-business ads, and etcetera. These like application forms creating big delay constraining’s i.e. the instant data should reach the destination within certain time limits. Therefore, we need a really efficient stable clustering method and routing in vehicle ad-hoc network which will be resistant to network delays and meets network requirements. The methods are proposed in the paper for optimization VANETs data traffic as well as to minimizing delay. First, here is presented, a stable clustering algorithm based on the destination, contextually take into consideration various physical parameters for cluster formation such as location of the vehicle and its direction, vehicle speed and destination, as well as a possible list of interests of the vehicle. And also the next main process is to depend on these “five parameters” we can calculate the “Cluster Head Eligibility” of each car. Second, based on this “Cluster Head Eligibility”, described cluster head selection method. Third, for efficient communication between clusters, present a routing protocol based on the “destination”, which considered an efficient selecting method of next forwarding nodes, which is calculated by using “FE” metric.
文摘该文主要面向上行汇聚流量为主的传感器网络应用场景,针对现有优化方案在灵活性和计算开销等方面的问题进行了分析,包括优化目标单一、节能方法对于多重寿命标准难以适应、计算复杂度与求解近似比难以取舍、环境突变或管理需求的调整无法快速响应等等,对当前流行的传感器硬件进行了数据收发的功耗测试后,根据其射频耗能特性,以提高网络可靠性的最小化"最大链路利用率"和单纯功耗优化的最小化"网络连通支配集"为优化目标,引入加权绿色因子,建立了功耗和性能可以调节的模型RES-WSN(Reliability and Energy Steerable WSN).该模型的求解复杂度较低,当网络有数百个节点时,问题依然可以较快求解,为传感器网络提供了一种在能量消耗和可靠性及多重寿命准则间柔性调节的方案.根据该文方案求得的路由关系和数据流传输的分配结果,以"Multiple Instances"的思路和拓展选项的方式在RPL路由协议的基础上给出了部署方案.通过实验验证,该文模型对网络的可靠性的调控比例最高为52.08%,对能量消耗的调控比例最高为60.51%,特别是在仅考虑节能优化且允许部分节点死亡的情况下,网络存活时间相比只考虑可靠性的情况延长了42.54%,与近期相关研究"MinST"模型相比延长了9.23%～15.38%.
文摘在无线传感器网络中,节点能量有限且一般没有能量补充,因此如何减少节点的能量消耗成为路由协议的研究目标。文中提出一种基于簇头预测和功率控制的节能路由算法CHFPC(Cluster Head Forecasting andPower Controlling),该算法利用能量和距离参数对簇头进行预测,并将功率控制这一机制引入分簇路由和数据传输的过程中,从而使节点的平均能耗降低。最后用OMNeT++仿真的结果表明所提出的方案在网络生存时间和网络总剩余能量指标上比LEACH算法分别提高23%和15%,而且节点生命周期也明显长于LEACH算法。
基金Project supported by the National Basic Research Program of China (Grant No. 2012CB725404)the National Natural Science Foundation of China(Grant Nos. 71071044, 71171185, 71201041, 71271075, and 11247291/A05)the Doctoral Program of the Ministry of Education of China (Grant No. 20110111120023)
文摘In this paper, an optimal resource allocation strategy is proposed to enhance traffic dynamics in complex networks. The network resources are the total node packet-delivering capacity and the total link bandwidth. An analytical method is developed to estimate the overall network capacity by using the concept of efficient betweenness （ratio of algorithmic betweenness and local processing capacity）. Three network structures （scale-free, small-world, and random networks） and two typical routing protocols （shortest path protocol and efficient routing protocol） are adopted to demonstrate the performance of the proposed strategy. Our results show that the network capacity is reversely proportional to the average path length for a particular routing protocol and the shortest path protocol can achieve the largest network capacity when the proposed resource allocation strategy is adopted.
