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An algorithm based on mobile agent for delay constrained least cost unicast routing


The delay constrained least cost path problem with imprecise delay information is discussed, and a distributed heuristic algorithm without any assumption of imprecise state information is presented.


In this paper, we add a delay variation constraint to the problem of delay constrained shortest path.


In this section, we simulate to study the effect of contention resolution scheme for delay constrained traffic.


In our simulation, we consider 20% of the total traffic as delay constrained traffic.

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It calculates the maximum number of sessions in a network with an endtoend delay constraint based on the adjacency matrix and the linkdelay matrix of the network.


Effective multicasting algorithm for dynamic membership with delay constraint


For streaming video, a big buffer is used as the associated delay constraint of the application is moderate and a very small buffer is used for conversational video to ensure that the forwarding delay of every packet is limited.


To be more realistic, we assume that the requesting peer has a delay constraint to display the content within a certain delay bound, and it also has limited incoming bandwidth.


The objective of the algorithms is to maximize the userdefined utility function value while meeting the endtoend delay constraint.

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An algorithm based on mobile agent for delay constrained least cost unicast routing


The delay constrained least cost path problem with imprecise delay information is discussed, and a distributed heuristic algorithm without any assumption of imprecise state information is presented.


In this paper, we add a delay variation constraint to the problem of delay constrained shortest path.


In this section, we simulate to study the effect of contention resolution scheme for delay constrained traffic.


In our simulation, we consider 20% of the total traffic as delay constrained traffic.

 更多 


 Mobile satellite network is a special timevarying network,and its QoS Routing problem is more complicated than the QoS Routing problem of current terrestrial networks.By exploiting the predictive nature of the mobile satellite topology and introducing the interrupting probability and the cost model of service,the influence on the QoS and network performance caused by the handover is described.Besides,a novel satellite network delay constraint minimum cost routing(SDCMCR) algorithm,which can obtain a path to... Mobile satellite network is a special timevarying network,and its QoS Routing problem is more complicated than the QoS Routing problem of current terrestrial networks.By exploiting the predictive nature of the mobile satellite topology and introducing the interrupting probability and the cost model of service,the influence on the QoS and network performance caused by the handover is described.Besides,a novel satellite network delay constraint minimum cost routing(SDCMCR) algorithm,which can obtain a path to satisfy the delay constraint as well as the minimization of influence caused by the handover,is proposed.This algorithm gives attention to the network performance of service interrupting and blocking.And at the same time,it has a low computing complexity to adapt to the restricted computing capability of satellite equipment.Correlative simulation indicates that this novel algorithm is superior to other current algorithm in respect of computing complexity,service blocking probability etc.  卫星网络是一种特殊的时变网络,其QoS路由问题比地面网络QoS路由问题更为复杂.本文利用卫星拓扑的可预测性,通过引入业务的中断概率和费用模型来描述链路切换对业务QoS以及网络的影响,并给出时延受限最小费用路由(SDCMCR)算法来解决在卫星链路时延长的情况下寻找满足时延限制条件且受切换影响最小的路径的问题,该算法可兼顾网络业务中断率和业务阻塞率等性能,且计算复杂度低,可适应星上设备处理能力的要求.仿真表明算法在计算复杂性、业务请求被阻塞的概率等方面都优于同类算法.  By the analysis of the characteristics of mobile satellite network,such as a long delay and a topological timevarying,a novel satellite network delay constraint optimal path(SDCOP)algorithm,which could obtain a path to satisfy the delay constraint condition as well as the minimization of interruption during the service,was proposed.This algorithm exploits the predictive nature of connectivity changes of timevarying topological to decrease the influence in the QoS routing performance caused by the handover.Besides,it... By the analysis of the characteristics of mobile satellite network,such as a long delay and a topological timevarying,a novel satellite network delay constraint optimal path(SDCOP)algorithm,which could obtain a path to satisfy the delay constraint condition as well as the minimization of interruption during the service,was proposed.This algorithm exploits the predictive nature of connectivity changes of timevarying topological to decrease the influence in the QoS routing performance caused by the handover.Besides,it has a low computing complexity to adapt to the restricted computing capability of satellite equipments.Correlative simulation indicates that this novel algorithm is superior to other current algorithm in respect of computing complexity,service blocking probability and interrupting probability etc.  针对卫星网络链路时延长和拓扑时变的特点,给出一种可满足时延限制且在业务持续时间内尽可能不发生中断的时延受限最优寻路(SDCOP)算法,该算法通过预测拓扑链接情况来有效降低链路切换对网络QoS的影响,且具有计算复杂度低,可适应星上设备处理能力的要求等优点。仿真表明算法在计算复杂性、业务阻塞率以及业务中断率方面都优于同类算法。  
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