Advances in emergency networking

Crisis situations require fast regain of control. Wireless ad-hoc networks will enable emergency services to act upon the actual status of the situation by retrieving and exchanging detailed up-to-date information. Deployment of highbandwidth, robust, self-organising ad-hoc networks will therefore enable quicker response to typical hat/where/when questions, than the more vulnerable low-bandwidth communication networks currently in use. This paper addresses a number of results of the projects AAF (Adaptive Ad-hoc Freeband communications) and Easy Wireless that enable high bandwidth robust ad-hoc networking

A survey on Routing Protocols in Wireless Sensor Networks

In ad-hoc WSN is a collection of mobile nodes that are dynamically and randomly located in such a manner that the interconnections between nodes are changing on a continual basis. The dynamic nature of these networks demands new set of network routing strategy protocols to be implemented in order to provide efficient end-to end communication. Moreover, such issues are very critical due to severe resource constraints like efficient energy utilization, lifetime of network, and drastic environmental conditions in WSNs. Neither hop-by-hop nor neither direct reach ability is possible in case of WSNs. In order to facilitate communication within the network, a routing protocol is used. In this paper we have carried out an extensive survey on WSN protocols based on structure of network, routing protocol of network & clustering techniques of routing protocols

A flexible QoS-aware routing protocol for infrastructure-less B3G networks

International audienceCurrent mobile devices support multiple network technolo- gies and network composition via such devices can enable service provisioning across heterogeneous networks. One of the key challenges for realizing this view is inter-domain routing. Indeed, given the diversity of involved network technologies and infrastructures, a exible routing protocol that takes into account their quality properties and dynam- ics is an important requirement. In this paper, we present a exible quality-aware routing protocol for infrastructure-less B3G environments that enables discovery of routes with op- timal bandwidth, delay or cost according to the preference of each client. The protocol is based on the Optimized Link- State Routing (OLSR) protocol and is designed to enable computation of quality-aware routes in multi-network envi- ronments. We detail the protocol, discuss its deployment and provide experimental results

An Insight into Current IoT Security Methods

This paper examines the security methods in the Internet-of-Things. The security methods are carefully studied and categorized into six layers according to the Internet-ofThings framework namely Event Producer and Consumer, Event Queuing System, Transformation and Analysis, Storage, Presentation and Action, and Users and Systems. It can be observed that most security methods emphasizes on Event Producer and Consumer layer whereas the least focused layer is Users and Systems layer. This study aims to present a comprehensive overview to researchers working in the domain of the Internet-of-Things security

Quality of service support, security and OSPF interconnection in a MANET using OLSR, Journal of Telecommunications and Information Technology, 2008, nr 2

The MANET networks are of prime interest for military networks. One of the proeminent routing protocols for MANET is OLSR, and indeed, OLSR has been used in many evaluations and experiments of MANETs. As OLSR is on its way to standardization, there are still a number of extensions that are useful and sometimes necessary for practical use of OLSR networks: such extensions are quality of service support, security, and OSPF interconnection. In this paper, we present the architecture, design, specifications and implementations that we made to integrate these features in a military test-bed. This test-bed is a real MANET comprising 18 nodes. These nodes communicate by radio and use the IEEE 802.11b MAC protocol. The OLSR routing protocol updates the routing table used by the IP protocol to forward packets

A survey on Routing Protocols in Wireless Sensor Networks

In ad-hoc WSN is a collection of mobile nodes that are dynamically and randomly located in such a manner that the interconnections between nodes are changing on a continual basis. The dynamic nature of these networks demands new set of network routing strategy protocols to be implemented in order to provide efficient end-to end communication.  Moreover, such issues are very critical due to severe resource constraints like efficient energy utilization, lifetime of network, and drastic environmental conditions in WSNs. Neither hop-by-hop nor neither direct reach ability is possible in case of WSNs. In order to facilitate communication within the network, a routing protocol is used. In this paper we have carried out an extensive survey on WSN protocols based on structure of network, routing protocol of network & clustering techniques of routing protocols

OLSR Fuzzy Cost (OLSR-FC): an extension to OLSR protocol based on fuzzy logic and applied to avoid selfish nodes

The mobile ad-hoc networks (MANET) are those whose nodes have mobility, energy restriction and operate simultaneously as end systems and router. One of the main problems found in MANETs is the occurrence of selfish nodes, which are those that refuse to route packets for other nodes. To address the issue of selfish nodes in MANETs and improve the flow of traffic in these networks, this paper proposes an extension to the OLSR protocol, based on Fuzzy logic, called OLSR Fuzzy Cost (OLSR -FC). Using the NS-2 simulator, the OLSR-FC proposal was compared to other extensions of OLSR protocol (e.g., OLSR-ETX, OLSR-ML e OLSR-MD) concerning the performance metrics: packet loss, end-to-end delay, Jitter, power consumption, routing overhead and throughput. The results showed that OLSR-FC obtains better performance than the evaluated extensions, avoiding selfish nodes and selecting routes whose links have little packet losses

Аналіз варіантів розвитку протоколу OLSR

Метою роботи є аналіз модифікацій протоколу маршрутизації OLSR. В даній роботі розглядається протокол маршрутизації OLSR, принцип та алгоритм його роботи. Визначаються переваги та недоліки цього протоколу. Проведений аналіз модифікацій протоколу OLSR, їх алгоритм роботи. Визначено способи усунення деякий недоліків основного протоколу за допомогою даних модифікацій. Велику увагу приділяється модифікації SU-OLSR. Цей варіант розвитку основного протоколу виконує визначення підозрілих MPR. Визначено основні недоліки протоколу.The theme of the work is "Analysis of the options for the development of the protocol OLSR". The purpose of the work is to analyze the modifications of the protocol routing OLSR. In this paper, OLSR routing protocol is considered, the principle and algorithm of its work. The advantages and disadvantages of this protocol are determined. An analysis of protocol modifications OLSR, their algorithm of work is carried out. The ways of eliminating some of the disadvantages of the main protocol with the help of these modifications are determined. Much attention is paid to SU-OLSR modifications. This variant of the development of the main protocol performs the definition of suspicious MPR. The main shortcomings of the protocol are determined