Description: 定向扩散（Directed Diffusion, DD）协议在omnet++模拟器上的实现。原理：Sink 向所有传感器节点发送兴趣(兴趣是通过分配不同的属性值来表示不同任务的描述符) , 每个传感器节点在收到兴趣后将其保存在各自的 CACHE 中。每个兴趣项包含一个时间标签域和若干个梯度域。当一个兴趣传遍整个网络后, 从 Source 到 Sink 之间的梯度就建立起来了，梯度反映了网络中节点对匹配请求条件的数据源的近似判断。一旦Source 采集到兴趣所需的数据, 那么它将沿着该兴趣的梯度路径传输数据到汇集点或基站。-Directional proliferation (Directed Diffusion, DD) agreement omnet++ Realize simulator. Principle: Sink to all sensor nodes send interest (interest is through the distribution of different attribute values to express a different mission descriptors), each sensor node after the receipt of interest in the preservation of their respective CACHE. Interest of each tag contains a time domain and a number of gradient domain. When an interest throughout the network, from the Source to Sink gradient between the built up, the gradient reflects the network node on the request of the conditions of matching the data source to determine approximate. Once the Source of interest collected the required data, it would be interested in the gradient along the path to transmit data to the focal point or base station. Platform: |
Size: 657408 |
Author:xiaomeihua |
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Description: Wireless Sensor Networks are wireless networks where every nodes recolects surrounding information. WSNs have several aplications such as militar survival, traffic control, building security, scientific research in other planets, etc. This project presents a communication protocol for wireless sensor networks based on the ant colony optimization metaheuristic, which uses artificial ant agents that recolects data from all sensor nodes of the network. Every ants fuzes data from a node and sends it to every other sensor and then to the base station. All ants look for a way to go where there is an energy eficient path. Platform: |
Size: 60416 |
Author:rodrigo |
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Description: Abstract: The optimal number of cluster heads is an important parameter of wireless sensor network performance. Network nodes will consume more energy if the number of cluster heads is too much or too little. This paper focuses on novel calculation method for ptimal number of cluster heads. Base on the analysis of LEACH energy dissipation model,novel lation method is derived from the total energy dissipation of a round. Simulation shows the
relationship of the optimal number of cluster heads, the number of frames in steady state phase and the distance between cluster heads and base station (BS).And it provides a theoretical basis for calculation of optimal number of cluster heads which can reduce
the energy consumption among nodes and achieves
an improvement on the network lifetime. Platform: |
Size: 260096 |
Author:Amir |
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Description: Wireless Sensor Networks (WSN) is different than the Cellular Networks as I mentioned earlier.
A WSN is composed of a large number of sensor nodes that communicate using a wireless medium (air).
The sensor nodes are deployed randomly in the environment to be monitored.
The sensor nodes distributed in ad hoc structure.
In WSN there is no base station and not all nodes hear each other.
The WSN is a multi-hop network.
Basic part of my code is to randomly place the sensor nodes in the given space then connecting each two nodes if the distance between them less than or equal to the communication radius. Platform: |
Size: 41984 |
Author:khala |
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Description: 温室：一个使用传感器监测大棚的TinyOS方案
通过无线网状网连接MICA2微尘。
此软件版本的目的是为人们熟悉与TinyOS的。 “
应用程序由三个方案：
* mica_greenhouse：一个TinyOS应用到温度和光照
从温室传感器读数。该应用程序处理消息路由
保持尘埃和微粒之间的每个Unix时间。路由拓扑
网络是动态建立在运行时的微尘。
* mica_transparentbase：在TinyOS的一部分发布一个TinyOS应用
软件分发，透明地向前从微尘的无线电消息
基站。此软件的完整性。
* java_basestation：一个Java应用程序从接收消息
温室。它还发送控制mesages听微尘
动态配置。-Greenhouse: A greenhouse uses the TinyOS sensor monitoring program to connect through the wireless mesh network MICA2 dust. This software release is intended for people familiar with TinyOS' s. " Application consists of three programs:* mica_greenhouse: a TinyOS application to temperature and light sensor readings from the greenhouse. The application handles message routing to keep dust and particles between each Unix time network routing topology is dynamically created at runtime of dust.* mica_transparentbase: part of the TinyOS TinyOS release a software distribution application, transparently forward messages from the dust of the radio base station. the integrity of the software.* java_basestation: a Java application receives a message from the greenhouse. It listen to dust control mesages to send dynamic configuration. Platform: |
Size: 459776 |
Author:李林 |
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Description: Wireless Sensor Networks (WSNs) have attracted much attention in recent years. The potential applications of WSNs
are immense. They are used for collecting, storing and sharing sensed data. WSNs have been used for various applica-
tions including habitat monitoring, agriculture, nuclear reactor control, security and tactical surveillance. The WSN
system developed in this paper is for use in precision agriculture applications, where real time data of climatologically
and other environmental properties are sensed and control decisions are taken based on it to modify them. The architec-
ture of a WSN system comprises of a set of sensor nodes and a base station that communicate with each other and
gather local information to make global decisions about the physical environment. The sensor network is based on the
IEEE 802.15.4 standard and two topologies for this application. -Wireless Sensor Networks (WSNs) have attracted much attention in recent years. The potential applications of WSNs
are immense. They are used for collecting, storing and sharing sensed data. WSNs have been used for various applica-
tions including habitat monitoring, agriculture, nuclear reactor control, security and tactical surveillance. The WSN
system developed in this paper is for use in precision agriculture applications, where real time data of climatologically
and other environmental properties are sensed and control decisions are taken based on it to modify them. The architec-
ture of a WSN system comprises of a set of sensor nodes and a base station that communicate with each other and
gather local information to make global decisions about the physical environment. The sensor network is based on the
IEEE 802.15.4 standard and two topologies for this application. Platform: |
Size: 491520 |
Author:eng |
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Description: 论文:在无线传感器网络中,传感器节点收集本地数据,通常通过其它节点将数据转发给基站,因而离基站越近的节点,消耗
的能量越多.如果采用通常的方法,即均匀布置传感器节点,则基站附近的节点将很快消耗完能量,基站也就无法收集数据.本
文通过研究无线传感器网络中的能量消耗,得到了一个布置传感器节点的密度函数,按此函数布置传感器节点可以有效地延长
系统的生命期.理论分析和模拟结果表明,本文的布置方案将系统生命期提高到均匀布置方案的3R2t倍,这里t为传感器节点的
通信距离,R为传感器节点的分布区域半径.-Fusion-based Sensor Placement for Target Detection with Guaranteed Accuracy
Abstract:In sensor networks,sensor nodes collect local data and transfer these data to the base station often relayed by other
nodes.Therefore sensor nodes that are nearer to the base station will consume more energy. If deploying sensor nodes in
general way, i.e. deploying nodes uniformly in the network, sensor nodes nearby the base station will use up energy soon and
the base station can t collect data anymore. This paper presents a density function to deploy sensor nodes through investigating
energy consumption in wireless sensor network. Theoretical analysis and simulation result show that deploying by method of
this paper improve system lifetime to times of deploying uniformly, where t is radio distance of sensor node and R is radius of
the region of deploying sensor nodes.
Platform: |
Size: 102400 |
Author:子木 |
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Description: in this file, modified leach is there. Inwhich cluster head not directly send data to base station. instead of it, it send data to nearer node of cluster which is also nearer to base station. so it save clster head energy and this way extend the life of wireless sensor network. Platform: |
Size: 30720 |
Author:Gaurang Rathod |
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Description: LEACH (Low Energy Adaptive Clustering Hierarchy) is designed for sensor networks where an end-user wants to remotely monitor the environment. In such a situation, the data from the individual nodes must be sent to a central base station, often located far from the sensor network, through which the end-user can access the data. Platform: |
Size: 1648640 |
Author:chandan kumar |
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Description: LEACH (Low Energy Adaptive Clustering Hierarchy) is designed for sensor networks where an end-user wants to remotely monitor the environment. In such a situation, the data from the individual nodes must be sent to a central base station, often located far from the sensor network, through which the end-user can access the data. MODIFIED LEACH IS ENHANCED VERSION OF LEACH PROTOCOL TO SAVE ENERGY. Platform: |
Size: 248832 |
Author:chandan kumar |
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Description: 一种用于无线传感网络的东西，用来对于传输数据到基站的节能传输算法-Stuff for a wireless sensor network, used for the transmission of data to the base station, saving transmission algorithm Platform: |
Size: 339968 |
Author:刘友为 |
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Description: The aim of the present work is to develop a new
Convergecast routing technique which allows to connect many
source nodes to a single sink node via a wireless sensor network
(WSN). The synthesized method overcame the problem of energy
consumption resulting the repetition of the course of the
edges during a transmission period. The proposed technique,
based on intelligent routing algorithm to transmit the collected
data to the base station, ensured a reduction of the routing paths
length. This new approach was applied to a WSN, designed to
control the temperature and volume of propane and butane in
the tanks of the British Gas Group, for minimizing the energy
consumed and increasing the life cycle of the network.
Index Terms—Convergecast routing technique,Wireless Sensor
Network WSN, Reduction of routing paths length, Minimization
of energy consumption, Elongation of the life cycle.-The aim of the present work is to develop a new
Convergecast routing technique which allows to connect many
source nodes to a single sink node via a wireless sensor network
(WSN). The synthesized method overcame the problem of energy
consumption resulting the repetition of the course of the
edges during a transmission period. The proposed technique,
based on intelligent routing algorithm to transmit the collected
data to the base station, ensured a reduction of the routing paths
length. This new approach was applied to a WSN, designed to
control the temperature and volume of propane and butane in
the tanks of the British Gas Group, for minimizing the energy
consumed and increasing the life cycle of the network.
Index Terms—Convergecast routing technique,Wireless Sensor
Network WSN, Reduction of routing paths length, Minimization
of energy consumption, Elongation of the life cycle. Platform: |
Size: 248832 |
Author:enis |
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Description: that monitor certain conditions in different locations and transfer data
through a network to an endpoint called base station. Because WSN nodes are
often deployed outdoors where a direct power outlet may not be available, energy
efficiency becomes a key factor in the design of WSNs. This work proposes an
antenna transmission power optimisation algorithm (TPOA) which dynamically
adjusts the power level of the transmission according to the last received signal
strength indicator (RSSI). The mechanism was implemented and tested on an
XbeeWSNthat uses a modifiedMixed Hop and signalReceived routing for mobile
Wireless Sensor Networks (MHRWSN) protocol. The energy consumption results
have shown that the proposed system can save as much as 76% of power in Tx
operations while maintaining a packet reception rate of above 85% Platform: |
Size: 1959880 |
Author:elmustafasayed@gmail.com |
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Search - sensor network for base station