Description: 根据有无固定基础设施，无线局域网又可分为BSS (Basic Service Set)和IBSS (Independent Basic Service Set)。我们要研究的ad hoc网络属于后者。假设在一个ad hoc网络中，移动节点的发射功率PTx总是恒定的。要发送数据的移动节点总是先监听信道，测量接收到的信号功率X，其中X= I + N, I为接收到的干扰，N是噪声。移动节点只有在X＜INThre时，才可以发射。式中，INThre为背景噪声门限。
在仿真中，我们规定每个移动节点的发射功率是常数，PTx = 1W；接收节点接收机的灵敏度Smin = -80 dBm；信号质量 min = 2 dB；系统的背景噪声门限INThre = 1.2e-10。
-According to the availability of fixed infrastructure, wireless local area network can be divided into BSS (Basic Service Set) and IBSS (Independent Basic Service Set). We have to study the ad hoc network belong to the latter. Assuming in an ad hoc network, mobile node s transmission power is always constant PTX. To send data to the mobile node always monitor channel, measuring the received signal power X, which X = I+ N, I was received interference, N is the noise. Mobile node only when X <INThre when it is fired. Where, INThre threshold for background noise. In the simulation, we require that each mobile node s transmission power is constant, PTx = 1W receiver node receiver sensitivity Smin =-80 dBm signal quality Platform: |
Size: 7168 |
Author:何炳钦 |
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Description: 基于P2P结构的无线网格资源发现机制.pdf
针对无线网络的特殊环境,提出了一种基于P2P 结构的无线网格资源发现机制,该机制结合了分布式
与集中式网格资源发现的优点,引入了超级节点的概念,通过超级节点管理域内用户,将资源信息存放在超级
节点中,避免了中央节点聚合目录的更新. 并在此机制基础上给出了一个无线网格信息服务架构,满足了无线
网格资源发现的分散性和可扩展性的特点. 理论分析和实验证明能够提高无线网格资源发现效率.-Based on the structure of a wireless P2P Grid Resource Discovery Mechanism. Pdf for the unique environment of the wireless network, a P2P-based wireless mesh structure resource discovery mechanism, which combines the distributed and centralized grid resource discovered the advantages of introduced the concept of super-node, through the super-node management region users, resource information will be stored in the super-node, to avoid polymerization of the central node of the updated directory. and in this mechanism is given based on a wireless mesh architecture information services to meet the a wireless mesh decentralized resource discovery and scalability characteristics. theoretical analysis and experimental results prove that wireless mesh to improve the efficiency of resource discovery. Platform: |
Size: 243712 |
Author:yinlu |
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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 Platform: |
Size: 1024 |
Author:王一 |
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Description: 无线传感器自组织成簇的基本思想是通过簇首对簇内节点间的相关信息融合及转发机制减少数据的传输量和距离，从而降低通信能量，达到网络节能的目的。-Self-organizing wireless sensor clusters through the basic idea is to cluster the first node of the cluster inter-related information fusion and forwarding mechanism to reduce the data transmission capacity and distance, thereby reducing communication energy and achieve energy-saving purpose of the network. Platform: |
Size: 396288 |
Author:中种种 |
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Description: 无线传感器网络节点数量大、资源有限,采用全球定位系统(GPS)定位设备来获取节点位置信息
成本太高,研究适合无线传感器网络节点定位算法具有重要意义。通过分析无线传感器网络节点定位算
法的基本原理,介绍已提出的几种节点定位算法,并进行分析比较。-The number of wireless sensor network node, and limited resources, the use of Global Positioning System (GPS) positioning equipment to obtain high cost of node location information, research for wireless sensor network node location algorithm of great significance. By analyzing the wireless sensor network node positioning algorithm for the basic principles that have been put forward to introduce several node localization algorithms, and analyzed and compared. Platform: |
Size: 128000 |
Author:luofengqing |
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Description: 无线自组网中源节点向目标节点发送数据包的过程-Wireless ad hoc network in the source node to the target node of the process of sending data packets Platform: |
Size: 3072 |
Author:snowapple |
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Description: Example: Distributed Wireless Control System，可用于无线传感器网络中-This example shows distributed control of a DC-servo using
communication over a wireless network. The example also shows how to
simulate power consumption and how to use the battery block. The model
contains two computer nodes located 20 m apart, each represented by a
TrueTime kernel block. A time-driven sensor/actuator node samples the
process periodically and sends the samples over the network to the
controller node. The control task in this node calculates the control
signal and sends the result back to the sensor/actuator node, where it
is actuated. The wireless communication link is at the same time
subject to a simple power control scheme. Power control tasks running
in both the sensor/actuator node and in the controller node
periodically send out ping messages to the other node to test the
channel transmission. If a reply is received, the channel is assumed
to be good and the transmission power is lowered. If on the other hand
no reply is received, then the transmi Platform: |
Size: 12288 |
Author:zhangxiangbin |
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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. Platform: |
Size: 223232 |
Author:胡位 |
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Description: 该编程是基于OPNET网络仿真软件，该代码功能是实现多无线传感器节点无线联系之间的节能方法。-The program is based on the OPNET network simulation software, the code function is to achieve multi-node wireless links in wireless sensor energy saving between. Platform: |
Size: 1462272 |
Author:王丽娟 |
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Description: 利用NS-2进行无线网络模拟 采用一个有3个节点的实例来说明利用NS-2进行无线网络模拟的具体流程，场景设置为一个500m*400m的矩形区域中。-Using NS-2 wireless network simulation using a three node example to illustrate the use of NS-2 wireless network simulation of specific processes, the scene is set to a 500m* 400m the rectangular area. Platform: |
Size: 1024 |
Author:lvfangfang |
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Description: 实现RSSI信号的16个Node节点采集，这个程序加以修改可以得到声音定位程序，实验室现在在做视频无线传感器网络的是在starget上实现的。-RSSI signal to achieve the 16 Node node collection, this procedure can be modified sound localization procedures, lab is now doing video wireless sensor network is implemented on the starget. Platform: |
Size: 7168 |
Author:范玉红 |
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Description: 设计无线传感器网络的路由协议，LEACH是第一个基于多簇结构的集群路由协议，是一种分布式的协议,每一个节点通过一个概率来决定自己是否成为簇头节点,并保证每轮有相当数量的簇头节点.
-Design of wireless sensor network routing protocol, LEACH is the first structure of a cluster based on multi-cluster routing protocol, the protocol is a distributed, each node to determine their own through a probability whether a cluster head node, and to ensure that each round there is considerable number of cluster head node. Platform: |
Size: 51200 |
Author:杨扬 |
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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. Platform: |
Size: 197632 |
Author: |
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Description: AODV(Ad hoc On—demand Distance VecLor Routing protoc01)是无线Ad
Hoc网络中一个重要的路由协议，其原理是源节点洪泛路由请求报文到目标节点，
目标节点收到此报文后立刻发送路由响应报文，发生路由中断的中间节点在本地
发送路由请求报文以恢复路由。-AODV (Ad hoc On-demand Distance VecLor Routing protoc01) is a wireless Ad Hoc network routing protocol is an important principle is to source nodes flood route request packets to the destination node, the target node receives the routing message sent immediately after response message, the occurrence of an intermediate node routing interrupt routing in the local request message sent to restore the route. Platform: |
Size: 19456 |
Author:赵杰 |
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Description: The proposed routing protocol for Wireless Sensor Network is hierarchical and cluster based. The protocol supports mobility in the Sensor Nodes as well as in the Sink. The entire
protocol is described in terms of two phases namely Setup Phase and Data Forwarding Phase. After deployment of the Sensor Nodes entire sensor field in divided into some logical clusters and each cluster contains Sensor Nodes with different roles such as Gateway Node, Cluster Head Node and Ordinary Sensor Node.
Majority of the computation intensive tasks are carried out in the Sink. Simulation results show the energy efficiency of the proposed protocol. The performance of the proposed protocol
has been compared with that of CBR mobile WSN and results show better performance of the proposed protocol. Future scope of the work is outlined. Platform: |
Size: 718848 |
Author:Mohamed Rias |
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Search - node wireless network