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Issues in wireless data management


Wireless connectivity is fast becoming a reality. Typical mobile and pervasive devices will be able to connect to, and accept connections from, the infrastructure whenever necessary. However, mobile data management has so far focused on disconnected operations, which involves replication of data and batch reconciliation of updates upon reconnection. Emerging wireless pervasive devices enable a new data management model for applications:

  1. Applications can propagate updates in a trickle fashion, providing several benefits:

  2. The infrastructure can push data to applications, with the following benefits:


However, there are a number of technical challenges that have to be overcome in order to implement this model:

  1. Wireless pervasive devices are "connectable" but, unlike desktops, not "connected". There are costs associated with a connection, including setup time, airtime or packet charges, and battery power. Among the questions we want to answer are:

  2. Pervasive devices are small and severely memory-constrained. Are there space-sensitive trickle-synchronization algorithms that do not overly compromise usability and latency?


[Back to Pervasive Synchronization and Messaging home page.]