I gone through the RFC4006 but didnt get the context of below paragraph
Certain applications require multiple credit-control sub-sessions.
These applications would send messages with a constant Session-Id
AVP, but with a different CC-Sub-Session-Id AVP. If several credit
sub-sessions will be used, all sub-sessions MUST be closed separately
before the main session is closed so that units per sub-session may
be reported. The absence of this AVP implies that no sub-sessions
are in use.
But here my question is
1. What could be the types of Multiple credit-ontrol Sub-session?
2. How can we include different cc-sub-session-ID for each sub-session, please give me an example with message structure using CCR message.