Abstract
Replicated real-time applications such as co-operative document editors have to continuously update a shared state, thus require low network delays. If we use such applications in mobile and weakly connected environments, state information often cannot be broadcasted immediately, and thus it is difficult to maintain consistency. We discuss this problem with the help of DreamTeam, our framework for distributed applications, which we extend to the mobile version Pocket DreamTeam. The DreamTeam environment allows the developer to generate replicated applications (e.g., collaborative diagram tools, multi-user text editors, shared web browsers) in the same way as single user applications, without struggling with network details or replication algorithms. For our mobile extension, we suggest an architectural decomposition according to the remote proxy pattern. This architecture has a number of benefits: it tolerates weakly connected devices and allows a developer to heavily re-use existing stationary applications.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Bey C., Freeman E., Hillerson G., Ostrem J., Rodriguez R., Wilson G., Dugger M.: Palm OS Programmer’s Companion, Volume I, Palm Inc, July 2001
Cormack G. V.: A Calculus for Concurrent Update, Department of Computer Science, University of Waterloo, Waterloo, Canada, 1995
Joseph A. D., Tauber J. A., Kaashoek M. F.: Mobile Computing with the Rover Toolkit, IEEE Transactions on Computers, Vol. 46, No. 3, March 1997, 337–352
Kistler J. J., Satyanarayana M.: Disconnected Operation in the Coda File System, ACM Transaction on Computer Systems, Vol. 10, No. 1, Feb. 1992, 3–25
Lotus Development Corporation: Lotus Notes, http://www.lotus.com/home.nsf/welcome/developernetwork
Lukosch S., Roth J.: Reusing Single-user Applications to Create Multi-user Internet Applications, Innovative Internet Computing Systems (I2CS), Ilmenau, June 21–22, 2001, LNCS 2060, Springer, 79–90
Munson J. P., Dewan P.: Sync: A Java Framework for Mobile Collaborative Applications, special issue on Executable Content in Java, IEEE Computer, 1997, 59–66
Myers B. A., Stiel H., Gargiulo R.: Collaboration Using Multiple PDAs Connected to a PC, Proceedings of the ACM 1998 conference on Computer supported cooperative work, 1998, 285–294
Noble B., Satyanarayanan M., Narayanan D., Tilton J. E., Flinn J., Walker K.: Agile Application-Aware Adaptation for Mobility, Proceedings of the 16th ACM Symposium on Operating System Principles, Oct. 1997, St. Malo, France
Roth J.: DreamTeam-A Platform for Synchronous Collaborative Applications, AI & Society (2000), Vol. 14, No. 1, Special Issue on Computer-Supported Cooperative Work, Springer London, March 2000, 98–119
Roth J.: Information sharing with handheld appliances, 8th IFIP Working Conference on Engineering for Human-Computer Interaction (EHCI’01), Toronto, Canada, May 11–13, 2001, LNCS 2254, Springer, 263–279
Roth J.: Patterns of mobile interaction, Proceedings of Mobile HCI 2001: Third International Workshop on Human Computer Interaction with Mobile Devices, M. D. Dunlop and S. A. Brewster (eds), IHM-HCI 2001 Lille, France, Sept. 10, 2001, 53–58
Roth J., Unger C.: Group Rendezvous in a Synchronous, Collaborative Environment, in R. Steinmetz (ed): Kommunikation in Verteilten Systemen (KiVS’99), 11. ITG/VDE Fachtagung, 2.–5. March 1999, Springer, 114–127
Roth J., Unger, C.: Using handheld devices in synchronous collaborative scenarios, Personal and Ubiquitous Computing, Vol. 5, Issue 4, Springer London, Dec. 2001, 243–252
Shapriro M.: Structure and Encapsulation in Distributed Systems: the Proxy Principle, Proc. of the 6th Internal. Conference on Distributed Computing Systems, Mai 1986, 198–204
Silva A. R., Rosa F. A., Gonçalves T., Antunes M.: Distributed Proxy: A Design Pattern for the Incremental Development of Distributed Applications, Proceedings of the 2nd International Workshop on Engineering Distributed Objects (EDO 2000), Davis, November 2000, California, USA, LNCS 1999, Springer, 165–181
Suzuki I., Kasami T.: A distributed mutal exclusion algorithm, ACM Transactions on Computer Systems, Vol. 3, No. 4, Nov. 1985, 344–349
Terry D. B., Theimer M. M., Petersen K., Demers A. J.: Managing Update Conflict in Bayou, a Weakly Connected Replicated Storage System, Proceedings of the fifteenth ACM symposium on Operating systems principles, Copper Mountain, CO USA, Dec. 3–6, 1995, 172–182
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2002 Springer-Verlag Berlin Heidelberg
About this paper
Cite this paper
Roth, J. (2002). Mobility Support for Replicated Real-Time Applications. In: Unger, H., Böhme, T., Mikler, A. (eds) Innovative Internet Computing Systems. IICS 2002. Lecture Notes in Computer Science, vol 2346. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-48080-3_16
Download citation
DOI: https://doi.org/10.1007/3-540-48080-3_16
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-43790-1
Online ISBN: 978-3-540-48080-8
eBook Packages: Springer Book Archive