XIR: Cache Invalidation Strategy for Xml Data in Mobile Environments

As eXtensible Markup Language becomes ubiquitous, XML transmission efficiency has been emerged as an important issue. The research area of XML is currently expanding into wireless environments, however, most previous works for XML broadcasting in wireless environments have not considered updating data. In this paper, we concern XML data update in wireless broadcast environments. We propose a cache invalidation strategy based on an invalidation report for XML data in wireless environments. Using our strategy, we can use the portion of cached XML data which updates only structural information. Simulations are carried out to evaluate the proposed methodology. Compared to the previous invalidation report based strategy, our strategy can reduce tuning time and increase cache hit ratio.