Context-Aware Migratory Services in Ad Hoc Networks

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Context-Aware Migratory Services in Ad Hoc Networks

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by Oriana Riva , Tamer Nadeem , Cristian Borcea , Liviu Iftode , Senior Member

Venue:	IEEE Transactions on Mobile Computing
Citations:	24 - 7 self

BibTeX

@ARTICLE{Riva_context-awaremigratory,
    author = {Oriana Riva and Tamer Nadeem and Cristian Borcea and Liviu Iftode and Senior Member},
    title = {Context-Aware Migratory Services in Ad Hoc Networks},
    journal = {IEEE Transactions on Mobile Computing},
    year = {},
    pages = {1313--1328}
}

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Abstract

Abstract—Ad hoc networks can be used not only as data carriers for mobile devices but also as providers of a new class of services specific to ubiquitous computing environments. Building services in ad hoc networks, however, is challenging due to the rapidly changing operating contexts, which often lead to situations where a node hosting a certain service becomes unsuitable for hosting the service execution any longer. We propose a novel model of service provisioning in ad hoc networks based on the concept of contextaware migratory services. Unlike a regular service that executes always on the same node, a migratory service can migrate to different nodes in the network in order to accomplish its task. The migration is triggered by changes of the operating context, and it occurs transparently to the client application. We designed and implemented a framework for developing migratory services. We built TJam, a proof-of-concept migratory service that predicts traffic jams in a given region of a highway by using only car-to-car short-range wireless communication. The experimental results obtained over an ad hoc network of personal digital assistants (PDAs) show the effectiveness of our approach in the presence of frequent disconnections. We also present simulation results that demonstrate the benefits of migratory services in large-scale networks compared to a statically centralized approach. Index Terms—Mobile computing, mobile applications, ubiquitous computing, distributed programming, distributed systems. Ç

Keyphrases

ad hoc network migratory service context-aware migratory service large-scale network new class service execution abstract ad hoc network contextaware migratory service client application different node personal digital assistant regular service operating context certain service mobile device building service frequent disconnection mobile application novel model present simulation result experimental result traffic jam ubiquitous computing data carrier car-to-car short-range wireless communication index term mobile computing proof-of-concept migratory service

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