Context-Aware Migratory Services in Ad Hoc Networks

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 s...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on mobile computing 2007-12, Vol.6 (12), p.1313-1328
Main Authors: Riva, O., Nadeem, T., Borcea, C., Iftode, L.
Format: Magazinearticle
Language:English
Subjects:
Ad hoc networks
Applied sciences
Building services
Context awareness
Context modeling
Context-aware services
distributed programming
distributed systems
Exact sciences and technology
Miscellaneous
mobile applications
Mobile computing
Personal digital assistants
Systems, networks and services of telecommunications
Telecommunication traffic
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Teletraffic
Traffic control
Ubiquitous computing
Valuation and optimization of characteristics. Simulation
Wireless communications
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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 context- aware 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.
ISSN:1536-1233
1558-0660
DOI:10.1109/TMC.2007.1053