Dynamic QoS-aware multimedia service configuration in ubiquitous computing environments

Xiaohui Gu, Klara Nahrstedt

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Ubiquitous computing promotes the proliferation of various stationary, embedded and mobile devices interconnected by heterogeneous networks. It leads to a highly dynamic distributed system with many devices and services coming and going frequently. Many emerging distributed multimedia applications are being deployed in such a computing environment. In order to make the experience for a user truly seamless and to provide soft performance guarantees, we must meet the following challenges: (1) users should be able to perform tasks continuously, despite changes of resources, devices and locations; (2) users should be able to efficiently utilize all accessible resources within runtime environments to receive the best possible Quality-of-Service (QoS). In this paper, we propose an integrated QoS-aware service configuration model to address the above problems. The configuration model includes two tiers: (1) service composition tier, which is responsible for choosing and composing current available service components appropriately and coordinating arbitrary interactions between them to achieve the user's objectives; and (2) service distribution tier, which is responsible for dividing an application into several partitions and distributing them to different available devices appropriately. Our initial experimental results based on both prototype and simulations show the soundness of our model and algorithms.

Original languageEnglish (US)
Title of host publicationProceedings - International Conference on Distributed Computing Systems
Number of pages8
StatePublished - 2002
Event22nd International Conference on Distributed Systems - Vienna, Austria
Duration: Jul 2 2002Jul 5 2002


Other22nd International Conference on Distributed Systems

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Computer Networks and Communications

Fingerprint Dive into the research topics of 'Dynamic QoS-aware multimedia service configuration in ubiquitous computing environments'. Together they form a unique fingerprint.

Cite this