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Description: 设定无线接入点能够始终提供最大吞吐量，终端节点的冗余通信模块各自的网络信道信噪比值随机变化，由此计算得冗余网络各自的CHF值。CHF切换机制根据冗余网络各自的采样值大小进行切换判决，考虑门限的CHF切换机制根据设定的上下切换门限值进行切换判决-Configure wireless access points can always provide the maximum throughput, end-node redundant network communication module respective channel signal to noise ratio value of random changes, which calculated the respective redundant network CHF values. CHF redundant network switching mechanism in accordance with their respective values of the size of the sampling switch decision, consider the threshold of CHF switch mechanism according to set upper and lower limit switch door switch decision
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Size: 1024 |
Author: 王一 |
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Description: 研究了多速率mesh网络中节点的吞吐量.:提出了多速率无线Mesh网络中节点吞吐量分析模型,用以分析在公平性保证条件下基于IEEE 802·11协
议构建的无线Mesh网络节点吞吐量.该模型计算出不同速率无线链路发送数据包的时间,寻找网络中单位时间
内完成数据包发送时间最大的瓶颈冲突域,根据瓶颈冲突域内负载流量速率得到节点吞吐量最大值.仿真结果表
明,该方法计算出的节点最大吞吐量与网络仿真结果一致,可以准确分析多速率无线Mesh网络节点吞吐量.
-Studied the multi-rate mesh network node throughput.: A multi-rate wireless Mesh network node throughput analysis model to analyze the conditions to guarantee the fairness of IEEE 802.11-based protocol to build a wireless network node throughput Mesh . The model calculated rate of wireless link to send a different packet of time, look for the network per unit time to complete a packet send time biggest bottlenecks in the domain of conflict, according to the bottleneck load flow rate region of conflict to be the maximum node throughput. The simulation results show that the method to calculate the maximum throughput of the node with the network simulation results can be an accurate analysis of multi-rate wireless Mesh network node throughput.
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Size: 223232 |
Author: 胡位 |
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Description: delays, jitter, processing times, round trip times, throughput graphs and statistics
whole network, link and node graphs and statistics
all the results can be
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Size: 3072 |
Author: Shin Kong Keun |
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Description: delays, jitter, processing times, round trip times, throughput graphs and statistics
whole network, link and node graphs and statistics
all the results can be
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Size: 142336 |
Author: Shin Kong Keun |
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Description: 用NS- 2 仿真各种路由协议性能时用到的传统运动场景发生器存在两个缺陷: 运动状态不能迅速过渡到稳态, 节点速度的
均匀分布区间起始值只能为0。为了弥补上述缺陷, Tracy Camp 研制了稳态运动场景发生器。通过仿真验证了采用该发生器可大
大缩短仿真时间, 在此基础上仿真AODV 和DSDV 两种路由协议, 首次从吞吐量、协议包开销、平均延迟三个方面对稳态运动场景
下的两种路由协议性能进行分析, 得出结论表明采用稳态运动场景进行路由协议仿真是非常必要的。
关键词: 稳态运动场景 setdest 更新过程 Random Waypoint-Abstr act: As a module of NS2, the traditional movement scenario generator, when simulating routing protocol, has two limitations.
One is that the transition time of stable status is long, and the other is that the uniform- distributing low bound of node speed is
only zero.To remedy these faults, Tracy Camp has developed a stable movement scenario generator.The simulation proves that
simulation time can be reduced largely by using this generator.Based on this result, a simulation for AODV and DSDV routing
protocol is implemented.Then the performance of two protocols is analyzed on three aspects: throughput, routing overhead packets,
average delay.At last the conclusion is drawn, which shows it is essential to adopt stable movement for simulation of routing
protocols.
Key words: stable movement scenario setdest renewal process Random Waypoint
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Size: 172032 |
Author: 王立 |
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Description: 该程序用于模拟单向mesh类型片上网络在给定的发包分布数据的文件决定下，预先得出该网络在每个节点中的throughput,而不需要进行真实的测试。该程序用来验证单向mesh类型片上网络是否具有可接受的throughput，然后再来决定是否进行进一步模拟。-The program used to simulate a one-way type of on-chip mesh network in a given distribution of data files contracting decision, pre-draw the network in each node throughput, without the need for a true test. The program used to verify the type of on-chip one-way mesh network is an acceptable throughput, and then come back to decide whether to conduct further simulations.
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Size: 547840 |
Author: 马思土 |
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Description: NS2结果分析awk文件，包括吞吐量、队长、jitter、延时等分析。-Analysis of NS2 awk files, including throughput, captain, jitter, delay and other analysis.
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Size: 2048 |
Author: 李华 |
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Description: To improve network spect ral efficiency , a network coding2aware met rics for wireless routing
expected coding2aware t ransmission count ( ECTX) is proposed. In general , there are two steps in cod2
ing2aware routing communication : one is finding coding opportunity and network2coded node in the
routing discovery phase , the other is determining the optimum path f rom the coding2available paths
and the coding2unavailable ones. The expected coding2aware t ransmission count fairly quantifies the
network coding gain while considering the wireless t ransmission conditions. We implement the ECTX
routing in wireless mesh system in C + + and conduct extensive evaluation. Simulation result s illust rate
that , compared with the ones which oblivious of coding gains using , the t ransmission efficiency can be
sharply increased in the whole network and achieves 5 ～20 throughput gains.-To improve network spect ral efficiency , a network coding2aware met rics for wireless routing
expected coding2aware t ransmission count ( ECTX) is proposed. In general , there are two steps in cod2
ing2aware routing communication : one is finding coding opportunity and network2coded node in the
routing discovery phase , the other is determining the optimum path f rom the coding2available paths
and the coding2unavailable ones. The expected coding2aware t ransmission count fairly quantifies the
network coding gain while considering the wireless t ransmission conditions. We implement the ECTX
routing in wireless mesh system in C + + and conduct extensive evaluation. Simulation result s illust rate
that , compared with the ones which oblivious of coding gains using , the t ransmission efficiency can be
sharply increased in the whole network and achieves 5 ～20 throughput gains.
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Size: 461824 |
Author: sunwei |
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Description: 整个无线通信演示系统由ABCD四个节点组成，根据硬件前端的实现，每个节点在收到与自己地址对应的数据包时触发同步信号，所以就需要一个中心节点来进行同步触发，本系统中以A节点为中心节点，B、C、D三个节点地位对等。A节点周期性的广播同步信息，从而实现四个节点的同步。A节点连接一台PC机，用来监视网络的情况并显示从其它节点发送过来的图像流信息。该软件可以实时对串口进行监听并显示A节点的路由表、网络的时隙表和吞吐量，实时获得B、C、D三个节点的图像流数据。-The wireless communications demonstration system consists of four nodes ABCD, depending on the hardware front-end implementation, each node address received with their corresponding data packet triggered synchronous signal, so we need a central node for syncing trigger, this system A central node to node, B, C, D status of the other three nodes. A node periodically broadcasts synchronization information in order to achieve synchronization of the four nodes. A node connected to a PC, used to monitor the situation of the network and displays from other nodes to send information over the image stream. The software can monitor real-time on the serial port and displays the A node routing table, the network time slot table and throughput, real-time access to B, C, D are three nodes of the image stream data.
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Size: 197632 |
Author: |
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Description: The channel is modeled by adding the Gaussian noise and Rayleigh Fading. Different combining methods and relaying protocols are studied and compared in this project. We analyzed performance characterizations in terms of The Bit Error Rate and the Throughput. The relaying protocols considered are Amplify & Forward and Detect & forward out of which the Amplify and Forward showed better performance. Among the combining schemes, the Maximal Ratio Combining scheme showed better Bit Error Rate and Throughput curves. The network was also extended to a four node communication system with two relays which act as the distributed antennas. Thus using the distributed antennas we can provide the space diversity without need for physical arrays.
Index Terms: Cooperative Diversity, Fading channels, combining techniques,
transmission protocols, Relay channel, Bit error rate, Throughput, Amplify and forward, Detect and Forward.
-The channel is modeled by adding the Gaussian noise and Rayleigh Fading. Different combining methods and relaying protocols are studied and compared in this project. We analyzed performance characterizations in terms of The Bit Error Rate and the Throughput. The relaying protocols considered are Amplify & Forward and Detect & forward out of which the Amplify and Forward showed better performance. Among the combining schemes, the Maximal Ratio Combining scheme showed better Bit Error Rate and Throughput curves. The network was also extended to a four node communication system with two relays which act as the distributed antennas. Thus using the distributed antennas we can provide the space diversity without need for physical arrays.
Index Terms: Cooperative Diversity, Fading channels, combining techniques,
transmission protocols, Relay channel, Bit error rate, Throughput, Amplify and forward, Detect and Forward.
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Size: 27648 |
Author: nani |
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Description: Hadoop是一个用于运行应用程序在大型集群的廉价硬件设备上的框架。Hadoop为应用程序透明的提供了一组稳定/可靠的接口和数据运动。在 Hadoop中实现了Google的MapReduce算法，它能能够把应用程序分割成许多很小的工作单元，每个单元可以在任何集群节点上执行或重复执行。此外，Hadoop还提供一个分布式文件系统用来在各个计算节点上存储数据，并提供了对数据读写的高吞吐率。由于应用了map
-Hadoop is a framework for running applications on large clusters of inexpensive hardware. Hadoop applications to transparently provide a stable/reliable set of interfaces and data movement. In Hadoop Google' s MapReduce algorithm, it can applications be split into many small units of work, each unit can be executed on any cluster node, or Repeat. In addition, Hadoop provides a distributed file system used to store data on each computing node, and provides a high throughput of data read and write. The application of the map
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Size: 4078592 |
Author: jw |
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Description: 实现多级节点的停止等待ARQ，算出吞吐量-To achieve the multi-stage node Stop and Wait ARQ, calculated throughput
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Size: 2048 |
Author: 黄东 |
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Description: NS2仿真 无线传感网 中节点的吞吐量，可直接使用。-This is NS2 simulation of wireless sensor network node ，it is about throughput, the code can be used directly。
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Size: 1024 |
Author: QQF |
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Description: Abstract—In this paper, we analyzed the impact of the hardware impairments at the relay node in amplifying and forwarding based cooperative networks. Especially, the accurate expression for the outage probability is proven with respect to the level of hardware impairments for Rayleigh fading channels. Moreover, we uate the system’s performance in term of the throughput which depends on the antenna noise, transmission rate and the source’s transmission power. Finally, the Monte-Carlo simulation’s result verifies the analysis in order to propose system’s design with the acceptable impairment of hardware in physical which can ensure the communication’s quality.-Abstract—In this paper, we analyzed the impact of the hardware impairments at the relay node in amplifying and forwarding based cooperative networks. Especially, the accurate expression for the outage probability is proven with respect to the level of hardware impairments for Rayleigh fading channels. Moreover, we uate the system’s performance in term of the throughput which depends on the antenna noise, transmission rate and the source’s transmission power. Finally, the Monte-Carlo simulation’s result verifies the analysis in order to propose system’s design with the acceptable impairment of hardware in physical which can ensure the communication’s quality.
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Size: 2048 |
Author: phuoc |
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