Design and implementation of SIP-based AOCE

Advance of charge at the end of conversation (AOCE) is a promising value-added service of telecommunication industry for the upgrading of telecommunication network to session initiation protocol SIP-based softswitch network. However, there is not a complete AOCE solution available for softswitch network. On the basis of softswith billing, the implementation of the signaling process of AOCE is studied and analyzed. This paper proposes a method for the implementation of AOCE function by SIP instant message mechanism and designs a dedicated AOCE SIPServe for AOCE and AOCE service software in Java. We have also performed a number of experiments in our NGN lab, the result of which shows that the billing system realizes the AOCE function for the general phone calls.