نتایج جستجو برای: leach tests

تعداد نتایج: 339566  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تبریز 1390

: با توجه به کاربرد گسترده شبکه های حس گری بی سیم در زمینه های علمی، نظامی و پزشکی و ... تحقیقات بسیاری در رابطه با بهینه سازی و بهبود عملکرد لایه های مختلف این شبکه انجام گرفته است. در سالهای اخیر تکنولوژی ساخت قطعات الکترونیکی پیشرفت زیادی کرده است و حسگرهای با اندازههای بسیار کوچک با توان مصرفی کم ساخته شدهاست. اما مشکل عمدهای که بیشتر در شبکههای حسگری بی سیم مطرح است، ذخیره انرژی محدود گرهه...

پایان نامه :وزارت علوم، تحقیقات و فناوری - موسسه آموزش عالی غیرانتفاعی و غیردولتی سجاد مشهد - دانشکده برق 1391

شبکه سنسوری بی سیم، شبکه ای متشکل از تعداد زیادی گره می باشد که داری محدویت های انرژی، حافظه و پهنای باند هستند و وظیفه اندازه گیری شرایط محیطی از جمله دما، فشار، تشخیص حرکت و... را بر عهده دارند و سپس داده ها را جمع آوری کرده و برای ایستگاه پایه (مرکز کنترل اصلی توسط انسان یا رایانه ) به صورت بی سیم ارسال می کنند. این شبکه ها برای مکان هایی که دسترسی انسان دشوار است، کاربردهای بسیاری دارد. یکی...

2010
Abderrahim BENI HSSANE Moulay Lahcen HASNAOUI Mostafa SAADI Said BENKIRANE

A clustering algorithm is a key technique used to increase the scalability and lifetime of the Wireless Sensor Networks (WSNs). In this paper, we propose and evaluate a distributed energy-efficient clustering algorithm for heterogeneous WSNs, which is called Position-Based Clustering (PBC). This protocol is an improvement of LEACH-E. In PBC, the cluster-heads are elected by using probabilities ...

2010
Xiaofang Li Lizhong Xu Huibin Wang Jie Song Simon X. Yang

The traditional Low Energy Adaptive Cluster Hierarchy (LEACH) routing protocol is a clustering-based protocol. The uneven selection of cluster heads results in premature death of cluster heads and premature blind nodes inside the clusters, thus reducing the overall lifetime of the network. With a full consideration of information on energy and distance distribution of neighboring nodes inside t...

2015
Arshdeep Kaur Satbir Singh

Wireless sensor network is an emerging field leading to the various applications worldwide. Small nodes being used are capable enough to sensing, computation, collection and forwarding the data to the Base Station. Battery source is one of the most prominent concerning issue in making the sensor network running for performing various assigned tasks. This battery source has all business with the...

Journal: :CoRR 2013
M. Aslam Muhammad Babar Rasheed Tauseef Shah Azizur Rahim Zahoor Ali Khan Umar Qasim M. W. Qasim Ahmad Hassan Abid Khan Nadeem Javaid

An energy efficient routing protocol is the major attentiveness for researcher in field of Wireless Sensor Networks (WSNs). In this paper, we present some energy efficient hierarchal routing protocols, prosper from conventional Low Energy Adaptive Clustering Hierarchy (LEACH) routing protocol. Fundamental objective of our consideration is to analyze, how these extended routing protocols work in...

2013
Zuo Chen Yao Xiao Xiaodong Li Renfa Li

It is the core issue of researching that how to prolong the lifetime of wireless sensor network. The purpose of this paper is to illustrate a clustering protocol LEACH-PF, which is a multihop routing algorithm with energy potential field of divided clusters. In LEACH-PF, the network is divided into a number of subnetworks and each subnetwork has a cluster head. These clusters construct an inter...

2012
Jongwon Choe Jun Xu

Abstract This paper suggests an algorithm which increases the energy efficiency based on LEACH (Low Energy Adaptive Clustering Hierarchy)[1] for sensor network routing. Due to the random cluster head election process, LEACH does not guarantee the optimization for the number and position of cluster heads. Also it results in inefficiency in energy consumption. This paper suggests improved cluster...

2017
ALAN J. GEORGE

Energy efficiency has always remained a pressing matter in the world of Wireless Sensor Networks. Irrespective of the number of routing protocols that exist for Wireless Sensor Networks, only a handful can be named as efficient. Yet above all these routing protocols stands the emblematic one, the LEACH protocol. This research work is aimed at bringing forth a new routing strategy based on the L...

2009
Rab Nawaz Kashif Bilal Mehtab Afzal

Wireless sensor network are sophisticated systems that are used to collect data from an inaccessible environment. They consist of base station and hundred to thousands of sensor nodes. Nodes in the sensor network are constrained by energy, processing power and memory. The sensor networks where base station is very distant from the sensor field, the energy efficiency in the working of sensor net...

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