Method, system and computer program to enable SIP event-based discovery of services and content within a community built on context information

摘要

A method for event notification system having servers and operating them, and offeree unit is disclosed. The method as discovery servers from offeree unit, transmitting a subscription request message comprising a discovery query; In response to the subscription request message, parsing a discovery query; If the discovery query can be supported by the discovery server and a step that allows for the subscription request. The method also includes forming a year context (context) query based on the analysis discovery query; And a context query server further comprises the step of sending the context query. Context query server parses the context query and thereby return the identifiers of the plurality of event servers that form the community of event servers that together determine a result of the discovery query. Discovery server a subscription event servers each used for forming a community of event servers, and a notification about the availability of services found in the subscriber unit.