Sensing task handover for indoor clustered wireless sensor network

This paper presents the proposal of implementing sensing task handover initiation control for wireless sensor network deployed in indoor environment. The structure of the wireless sensor network is based on indoor clustering so that sensor nodes are grouped in different clusters according to room partitions. For such a network, a simple and efficient multi-node handover initiation control method is proposed for the decision of handover initiation by comparing the combined received signal strengths and the number of effective nodes between two neighbouring clusters. Experiments were conducted to test the possibility and evaluate the performance of the proposed method. The results show that sensing task handover is possible to happen at accurate time while crossing boundary between two clusters by applying the proposed method

KABLOSUZ HETEROJEN ALGILAYICI AĞLAR IÇIN BULANIK MANTIK TABANLI BIR KÜME BAŞI SEÇME ALGORITMASI

Kümeleme, algılayıcı ağın yaşam süresini arttırmak için enerji tüketimini azaltan önemli bir tekniktir. Homojen kümeleme teknikleri tüm algılayıcı düğümlerin enerji miktarlarının ve özelliklerinin aynı olduğunu varsaymaktadır. Bu yüzden, geliştirilmiş küme başı seçme algoritmaları algılayıcı düğüm heterojenliğini dikkate almamaktadır. Bu çalışmada, heterojen algılayıcı ağlar için yeni bir bulanık mantık tabanlı küme başı seçme algoritması amaçlanmıştır. Veri oranı, enerji seviyesi ve mesafe parametreleri geliştirilen bulanık mantık biriminin girişleri olarak belirlenmiştir. Amaçlanan algoritma, küme başı değişim sayısı ve enerji tüketim oranı ölçütleri ile literatürdeki benzer bir bulanık mantık tabanlı algoritma ile karşılaştırılmıştır. Geliştirilen algoritma, sadece küme başı değişim sayısını azaltmakla kalmayıp enerji tüketim oranını da düğümlere göre %5 ile %75 arasında azaltmaktadır

Telecommunications Networks

This book guides readers through the basics of rapidly emerging networks to more advanced concepts and future expectations of Telecommunications Networks. It identifies and examines the most pressing research issues in Telecommunications and it contains chapters written by leading researchers, academics and industry professionals. Telecommunications Networks - Current Status and Future Trends covers surveys of recent publications that investigate key areas of interest such as: IMS, eTOM, 3G/4G, optimization problems, modeling, simulation, quality of service, etc. This book, that is suitable for both PhD and master students, is organized into six sections: New Generation Networks, Quality of Services, Sensor Networks, Telecommunications, Traffic Engineering and Routing

Multi-Cellular Heterogenous VHO Algorithm Using Fuzzy Logic System

The need for data services with more bandwidth is increasing. Highspeedinternet and intranet access, video conferencing, various multimedia services, is in demand. WLANs (Wireless Local Area Networks) can providehighspeed access to network resources. WLANs working at the datarate of as high of 600 Mbps are already in use. Now new mobile generations are emerging thatcan provide data services like GPRS technology (2.5G), which is already in use, can support up to 171 Kbps data rate and UMTS (3G) can provide up to 2 Mbps. An interworking can be implemented between WLANs and mobile networks so that they complement each other. Thus we can utilize the benefits of both these kind of technologies which can be useful for the mobile users. In certain places very high speed and low cost data services are highly desired. These are the hotspots. WLANs can give both low cost data services with a high speed.So WLANs can be highly useful to the mobile users in the hotspots. WLANs help to provide the user with cheap and cost effective high bandwidth data services. A mobile terminal can easily change its point of contact from a WLAN to a cellular network while roaming, thus availing a seamless connection. Hence here support of mobility is highly essential. This will make the availability of a large amount of bandwidth possible for the user thus it will save both cost and power consumption. This interworking will reduce traffic and interference in the mobile network. A reliable handoff (HO) algorithm is highly essential for a seamless connection in cellular communication. New HO algorithms based on advanced techniques like neural networks and fuzzy logic systems are slowly emerging which are comparatively more robust than the conventional handoff algorithms. The algorithm designed be such that it can deal with dynamic conditions appearing in a wireless scenario

Mobile Ad-Hoc Networks

Being infrastructure-less and without central administration control, wireless ad-hoc networking is playing a more and more important role in extending the coverage of traditional wireless infrastructure (cellular networks, wireless LAN, etc). This book includes state-of-the-art techniques and solutions for wireless ad-hoc networks. It focuses on the following topics in ad-hoc networks: quality-of-service and video communication, routing protocol and cross-layer design. A few interesting problems about security and delay-tolerant networks are also discussed. This book is targeted to provide network engineers and researchers with design guidelines for large scale wireless ad hoc networks

Mobile Ad Hoc Networks

Guiding readers through the basics of these rapidly emerging networks to more advanced concepts and future expectations, Mobile Ad hoc Networks: Current Status and Future Trends identifies and examines the most pressing research issues in Mobile Ad hoc Networks (MANETs). Containing the contributions of leading researchers, industry professionals, and academics, this forward-looking reference provides an authoritative perspective of the state of the art in MANETs. The book includes surveys of recent publications that investigate key areas of interest such as limited resources and the mobility of mobile nodes. It considers routing, multicast, energy, security, channel assignment, and ensuring quality of service. Also suitable as a text for graduate students, the book is organized into three sections: Fundamentals of MANET Modeling and Simulation—Describes how MANETs operate and perform through simulations and models Communication Protocols of MANETs—Presents cutting-edge research on key issues, including MAC layer issues and routing in high mobility Future Networks Inspired By MANETs—Tackles open research issues and emerging trends Illustrating the role MANETs are likely to play in future networks, this book supplies the foundation and insight you will need to make your own contributions to the field. It includes coverage of routing protocols, modeling and simulations tools, intelligent optimization techniques to multicriteria routing, security issues in FHAMIPv6, connecting moving smart objects to the Internet, underwater sensor networks, wireless mesh network architecture and protocols, adaptive routing provision using Bayesian inference, and adaptive flow control in transport layer using genetic algorithms

Mobile Ad Hoc Networks

Guiding readers through the basics of these rapidly emerging networks to more advanced concepts and future expectations, Mobile Ad hoc Networks: Current Status and Future Trends identifies and examines the most pressing research issues in Mobile Ad hoc Networks (MANETs). Containing the contributions of leading researchers, industry professionals, and academics, this forward-looking reference provides an authoritative perspective of the state of the art in MANETs. The book includes surveys of recent publications that investigate key areas of interest such as limited resources and the mobility of mobile nodes. It considers routing, multicast, energy, security, channel assignment, and ensuring quality of service. Also suitable as a text for graduate students, the book is organized into three sections: Fundamentals of MANET Modeling and Simulation—Describes how MANETs operate and perform through simulations and models Communication Protocols of MANETs—Presents cutting-edge research on key issues, including MAC layer issues and routing in high mobility Future Networks Inspired By MANETs—Tackles open research issues and emerging trends Illustrating the role MANETs are likely to play in future networks, this book supplies the foundation and insight you will need to make your own contributions to the field. It includes coverage of routing protocols, modeling and simulations tools, intelligent optimization techniques to multicriteria routing, security issues in FHAMIPv6, connecting moving smart objects to the Internet, underwater sensor networks, wireless mesh network architecture and protocols, adaptive routing provision using Bayesian inference, and adaptive flow control in transport layer using genetic algorithms

Performance evaluation of user mobility on QoS classes in a 3G network

The popularity of IP services is increasing and the demand for managing traffic with different QoS classes has become more challenging. The stability of the system is affected by the rate of voice traffic. Mobility allows users to be connected at all time where handover may occur as it is not always possible to be connected to the same base station. Mobility and handover cause severe interference, which affects overall throughput and capacity of the system. The system requires greater capacity with more coverage area. This study deals with the impact of user mobility on voice quality in IP based application in a 3G Network. The aim is to improve the system performance in mixed traffic environment. A mathematical model is used to analyse the impact of using different type of coder on packet end-to-end delay and packet loss. The simulation results indicate that types of coder affect the system performance. Application of scheduling based on weight and load balancing technique can improve the system performance. The deployment of scheduling based on weight and a load balancing technique have been investigated to reduce the end-to-end delay and to improve overall performance in mixed traffic environment. The results under different conditions are analysed and it is found that by applying scheduling scheme, the quality of voice communication can be improved. In addition, load balancing technique can be used to improve the performance of the system. Apart from the decrease in delay, the technique can increase the capacity of the system and the overall stability of the system can be further improved. Finally, network security is another important aspect of network administration. Security policies have to be defined and implemented so that critical sections of the network are protected against unwarranted traffic or unauthorized personnel. The impact of implementing IPSec has been tested for voice communication over IP in a 3G network. Implementing the security protocol does not significantly degrade the performance of the system.EThOS - Electronic Theses Online ServiceGBUnited Kingdo

Journal of Telecommunications and Information Technology

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