SHADOW: Smart and highly adaptive data-sharing over weak connections

Mika Hongisto

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review


This paper introduces the Shadow, a decentralised data-sharing model for mobile networks, and provides insight into challenges faced in mobile replication and communication technologies. Furthermore, the viability of the implemented data-sharing model is evaluated and the results explained. The Shadow has been designed to offer maximum availability for data access while sacrificing part of reliability. This paper shows that a combination of optimistic replication and decentralised replica management can be used to form highly adaptive data sharing features for dynamic networks. The designed model cannot be compared to database solutions, as it does not provide strong consistency guarantees. On the other hand, it functions without any manual preconfiguration and centralised service providers. The Shadow provides high data access availability and adaptability into the environment at the expense of low reliability for data semantics. It proves that mobile data sharing is viable with current technology if update transactions are not allowed.
Original languageEnglish
Title of host publication1st International Conference on Mobile and Ubiquitous Multimedia
Subtitle of host publicationMUM2002
EditorsTimo Ojala, Mark Ollila
Place of PublicationOulu
PublisherUniversity of Oulu
ISBN (Print)978-951-42-6909-7
Publication statusPublished - 2002
MoE publication typeA4 Article in a conference publication
Event1st International Conference on Mobile and Ubiquitous Multimedia. MUM2002 - Oulu, Finland
Duration: 11 Dec 200213 Dec 2002


Conference1st International Conference on Mobile and Ubiquitous Multimedia. MUM2002


  • weak connections
  • Mobile replication
  • smart data distribution


Dive into the research topics of 'SHADOW: Smart and highly adaptive data-sharing over weak connections'. Together they form a unique fingerprint.

Cite this