at last, using the ns-2 network simulator, this thesis presents the results of a detailed performance evaluation on primitive dream protocol and improved dream protocol from four aspects: end-to-end delay, data packet delivery ratio, control packet overhead and total number of packets.

we simulated the two improved algorithm using the network simulation software opnet, the result proved that both of them performed better than the dynamic source routing protocol from the aspect of average end-to-end delay and packet delivery ratio.

最后使用网络仿真软件OPNET分别对两种改进方案进行了仿真分析，实验结果表明改进后的DSR协议在平均端到端时延、包传输率和路由开销等性能上都有明显的改善。

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the relationship between its end-to-end voice quality and delay is quantitatively analyzed by using the e-model, the main delay components in the voip system pointed out by setting up a mathematical model and the mechanism of their generation and parameters affecting them studied.

利用E模型定量地分析了语音质量与端到端时延的关系，通过建立数学模型，指出了VoIP系统中主要的时延分量，并研究了这些时延分量产生的机理和影响它们的参数。

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to estimate performance of essdrr in end-to-end delay and short-term throughput property, extensive simulation experiments have been done using ns2 in the same condition.

为了评价其优劣性，在同一仿真条件下利用NS2对该算法以及三个类似算法做了大量仿真实验，主要考察并比较了各算法的端到端时延、短期吞吐率等性能指标。

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in this paper, a delay coordination based multihop crossbar scheduling algorithm is presented, which is the most urgent packet. this algorithm can provide end-to-end delay guarantee of packets.

提出了一种能够提供端到端时延保证的多跳间时延协作Crossbar调度算法（紧急分组优先算法）。

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simulation shows the wgc improves predict accuracy. third, investigate the scale behavior of end-to-end delay.

仿真结果表明WGC改善了预测的性能。（三）分析了端到端时延的尺度特性。

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recently, multimedia technologies have been developed rapidly. this kind of application require the network to provide a certain amount of quality of service ( qos), such as bandwidth, the end-to-end delay and packet loss rate.

近年来，多媒体技术快速发展，这类应用需要网络能够提供一定的服务质量保证（QoS），例如带宽、端到端时延和丢包率等。

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at last, in order to better analyze the system behavior, the paper proposes a modified two-dimensional tandem queuing model, which can calculate the qos metrics more accurately, especially the end-to-end delay.

最后，为了更好地分析系统特性，提出了一种改进的二维串联队列模型，该模型能够更准确地估计QoS指标，尤其是端到端时延。

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simulation results based on the platform ns show that this algorithm has been significantly improved compared to the red algorithm in the performance of packet loss ratio, end-to-end delay, throughput and delay jitter.

NS仿真结果表明该算法在丢包率、端到端时延、吞吐量以及时延抖动性能方面比RED算法均有较明显的提高。

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compared to the primitive dream protocol, the improved dream protocol can reduce end-to-end delay, control packet overhead and total number of packets notably.

与原始DREAM协议相比，改进后的协议的平均端到端时延、控制分组开销和网络分组量都有明显减少。

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analysis of end to end delay of ngn service

NGN业务的端到端时延分析

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simulation results show that the algorithm can provide qos quality, such as higher collateral-received-ratio and lower end-to-end delay.

仿真结果表明，该算法能保障较高的通信成功率及较低的端到端时延，提供QoS保障。

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qos control for providing end-to-end delay and delay jitter guarantee

提供端到端时延和时延抖动保障的QoS控制

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measurement and implementation of internet end-to-end delay

基于GPS的端到端时延测量方法设计方案

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measurement and estimation of end-to-end delay in ip networks

IP网络中端到端时延特性的测量与估计

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compared with other fixed control channel based protocol, it significantly reduces the probability of collision and congestion, thereby improves the end-to-end delay and network throughput. 3.

与其它基于固定控制信道的MAC协议相比，大大降低了发生冲突和拥塞的概率，进而降低了端到端时延，并提供了良好的端到端吞吐性能。

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as one of the most important parameters to evaluate the quality of services of internet, internet end-to-end delay has become a research focus in recent years.

端到端时延是评估Internet的网络性能的重要参数之一，也是近年来的研究热点。

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the effect of the parameters on the joining process using powder interlayer was studied. the density of joint using assisted electromagnetic field was lower than using assisted electronic field. however, the crack tended to generate in the joint with assisted electronic field.

分析了采用粉末中间层时工艺参数对于连接过程的影响，发现电磁场辅助连接接头比电场辅助连接接头的致密度低，但是采用电场辅助连接时在接头处容易产生裂纹。

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finally, the research reveals that variation in subgenres imposes no significant influence on the density of english and chinese global conjunctives in expository texts except for the obvious statistical distinction between the numbers of global conjunctives in chinese essay and speech.

三，除了汉语小品文及演讲中的连接成分在数量上有统计学差异外，连接成分使用密度在其它英汉说明文次体裁中的变化不大。

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in the case of suffering ddos attacks, there are plenty of packets which are unable to establish communication with servers in the network, as is called one-way connection packet, whose capacity can be reflected by the density of one-way connection.

当发生DDoS攻击时，被攻击网络中存在大量与服务器无法建立正常通信的数据包&单边连接包，单边连接密度能直观地体现当前网络中单边连接包的量。

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the density and refractive index of glass are increased evidently with the addition of tio_2, which plays the role of enhancing connection and compactness degree of glass structure net.

TiO2的加入能提高玻璃结构网络的连接程度和堆积密度，从而使玻璃的密度和折射率线性增大。

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