MECHANISM TO CONVEY DYNAMIC CHARGING INFORMATION OVER SIP

摘要

A system and method of providing charging information to the participants for a session is disclosed. User A initiates a session to user B, by sending an invitation message. The message contains an application body. A first method talks about basic charging framework involving network level manipulation and second method being an offer answer model for charging. In network level manipulation, the user A sends an invitation message to proxy server which modifies the application body of the message before sending the message to user B. In offer answer model for charging, user A initiates an offer for charging, which is sent to user B and means of negotiation is involved between both. Means of negotiation allows implementing different charging schemes, and User B or User B's network can also initiate the charging offer.