Alcatel Lucent

Lucent Technologies Inc.

Ke Pei

Yigang Cai

Jie Su

Sheng Chen

Xiang Li

Qinghong He

Jay Z Zhao

Ya Wu

Ling Jiang

Judith A Stafford

Chao Liang Zhang

Chaoliang Zhang

Qing Hong He

Jie 21-211 Beijing Quin Su

Guang Rong Xing

IMS gateway systems and methods are disclosed for providing budget control in an IMS network. IMS networks allow for media changes (e.g., audio to audio/video) during an IMS session. An IMS gateway system described herein receives a session control message (e.g., SIP INVITE message) responsive to the media change during the session. The IMS gateway system identifies media information for the new media in the session control message. The IMS gateway system generates a corresponding charging request message, and includes media information for the new media in the charging request message. The IMS gateway system then transmits the charging request message to an online charging system (OCS) to provide for charging of the session based on the new media for the session.

IMS budget control for a media change during an IMS session

IMS gateway systems and methods are disclosed for providing online charging for IMS sessions. An IMS gateway system described herein operates based on a state machine to provide charging triggers and IMS session control. For one charging trigger, the IMS gateway system transmits an initial credit control request message to an online charging system (OCS) responsive to receiving a session initiation message from a first subscriber of a session. For another charging trigger, the IMS gateway system transmits an update credit control request message to the OCS responsive to receiving a session acceptance message from a second subscriber of the session. For another charging trigger, the IMS gateway system transmits a termination credit control request message to the OCS responsive to receiving a session termination message. The IMS gateway system may trigger on other session control messages or charging messages from the OCS to provide online charging.

IMS gateway systems and methods

Growing community of inventors

Beijing, China

Ke Pei