Parallel processing of triggering rules in SIP event notification filters
US8132182B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2007 |
| Grant date | Mar 6, 2012 |
| Priority date | — |
| Expiry date | Jan 3, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2209/544
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system for processing triggering rules in SIP event notification filters, including an XPath processor configured to collect a set of XPath expressions from at least one trigger of at least one SIP event notification filter of at least one subscribers in a set of subscribers who are subscribed to state information of a resource, and create a merged finite state automaton having a plurality of nodes and transitions that collectively represent the combination of the XPath expressions, and a streaming parser configured to parse previously-published state information of the resource and newly-published state information of the resource, and stream parsing events of the parsed information to the XPath processor, where the XPath processor is configured to employ the automaton to perform a streaming evaluation of the XPath expressions in parallel to determine which nodes of the parsed information satisfies any of the XPath expressions represented by the automaton.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.