Performance of Parallel Signaling between IMS Presence Server and Web Services

There is an increasing trend of accessing multimedia and web services embedded with Presence service over the mobile, which have driven the telecom operators to look for the new and better ways to provide such services. Presence service puts a lot of load on the IMS network and it can contribute 50% or more to the total signaling load which can increase end-to-end delay. In this paper we have analyzed the time needed to update presence information between IMS network and Web services and also proposed the way to minimize the delay by sending messages to all Web services at the same time.