| 摘要 |
Communication networks and methods are disclosed for providing charging for offnet sessions between an IMS network and a legacy network. The IMS network generates a charging ID for the session and includes the charging ID in charging records that are generated for the session. The IMS network also transmits the charging ID to the legacy network in the signaling transmitted from the IMS network to the legacy network for the session. The legacy network receives the charging ID from the IMS network, and includes the charging ID in a charging record generated for the session. The billing system can then correlate charging records generated by the IMS network for the session with a charging record generated by the legacy network for the session based on the charging ID included in the charging records.
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