T2-5 - Sedma Nacionalna Konferencija so Me|unarodno U~estvo...

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FUZZY FORWARDING THE CONTENT OF EVENTS IN MOBILE AD-HOC NETWORKS Anna Lekova 1 1 Institute of Control and System Research - Sofia, [email protected] Abstract – When users meet and use their mobile devices to form a temporarily wireless network to support their collaboration, we call this a mobile ad-hoc network (MANET). Basically the paper attempts to enable spontaneous collaboration among mobile applications running on small devices like bio-sensors and smart cards, which should participate in content-based system to produce and consume notifications. Here an overview of infrastructure for less tightly coupled communication in MANET and information forwarding by fuzzy model for content-based event filtering on the local mobile devices, are presented. A new design alternative for watchdogs on the local nodes, based on fuzzy logic within the emergency-and-rescue scenarios, is the main goal of that study. Keywords – MANET, Content-based Forwarding, Publish/Subscribe Model, Fuzzy Logic 1. INTRODUCTION Mobile ad-hoc networks (MANETs) denote complex distributed systems that comprise wireless mobile nodes that can freely and dynamically self-organize into arbitrary and temporary ‘‘ad-hoc’’ network topologies, allowing people and devices to seamlessly connect in areas with no pre-existing communication infrastructure [2]. A simple MANET architecture is shown in Fig. 1. [2]. The widespread deployment and use of wireless data communications causes the need for middleware to interconnect the components that comprise a mobile application. Research on middleware for mobile ad-hoc networks is still in its early development. The dynamic nature of MANETs causes middleware services to be based on asynchronous communication solutions, such as distributed event notification system, because the mobile nodes might unexpectedly be out of reach or turned off. Classical middleware technologies have been adopted. These include mobile agents and reactive programming through the usage of events [1,3,7]. Watchdog definition: an agent who’s task is to monitor, recognize and report arbitrary local events. The DENS implements a distributed event notification service (DENS) , whereas the watchdog (WD) component implements a local event notification service (LENS). Middleware for mobile computing must deal with the increased complexity that comes with a dynamically changing population of application components and the resulting dynamic reconfiguration of the connections between these components, as it requires a less tightly coupled communication relationship between application components compared to the traditional client/server communication model [7]. Content-based communication is a novel communication service whereby the flow of messages from senders to receivers is driven by the content of the messages, rather than by explicit addresses assigned by senders and attached to the messages [1]. Using a content- based communication service, receivers declare their interests by means of selection predicates, while senders simply publish messages. An application for
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This note was uploaded on 02/18/2010 for the course ITK ETF113L07 taught by Professor Popovskiborislav during the Spring '10 term at Pacific.

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T2-5 - Sedma Nacionalna Konferencija so Me|unarodno U~estvo...

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