Patent ID: 7898974

Claim:
A method for obtaining Quality of Service (QoS) information of a session, comprising: configuring a policy for analyzing QoS of a session; extracting a control message of the session during the session; obtaining QoS information of the session from information carried in the control message according to the policy for analyzing the QoS of the session, wherein the policy is configured on a Signaling Proxy (SP), a Media Proxy (MP), an intermediate server, or a separately-arranged policy server, wherein if the policy is configured on the intermediate server or the separately-arranged policy server, when a session is established: the SP sends a message to the intermediate server or the policy server to request the intermediate server or the policy server to determine whether it is necessary to make a QoS analysis on the session; the intermediate server or the policy server determines that it is necessary to make a QoS analysis on the session according to the configured policy information and returns a notification to the SP; or the intermediate server sends a notification, which is determined according to the policy, indicating that it is necessary to make a QoS analysis on the session to the MP; the SP sends the notification indicting it is necessary to make a QoS analysis on the session to the MP; or the intermediate server or the policy server determines that it is necessary to make a QoS analysis on the session according to the configured policy information and returns the notification to the MP directly.