| 摘要 |
The SIP server can be comprised of an engine tier that is designed for high throughput processing of SIP communications and a state tier that maintains state information for access by the engine tier. A Java-based online charging application can be deployed on the SIP server and can enable various applications residing thereon to generate and transmit credit authorization requests to an online charging function server in accordance with the Diameter Ro protocol. These requests can be based on credit authorization with unit reservation and credit authorization with direct debiting. The session state associated with these requests can be maintained in the state tier of the SIP server which can be queried and accessed by the engine tier. Upon receiving appropriate responses from the OCF server, the SIP server can deliver the services and sessions requested by end users.
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