System and method for resource admission and control

A method of resource admission and control comprising:

• receiving,
• by an interface unit for an application function unit, a service request sent from the application function unit, wherein the service request carries information of a type of an access network;
• implementing, by a policy decision function unit, a service-based policy and decision function (SPDF) and a policy and charging rules function (PCRF);
• identifying the type of the access network according to the service request received by the interface unit for the application function unit, and selecting corresponding service procedure for the resource admission and control according to the type of the access network;
• wherein if the type of the access network is a fixed network access, the resource admission and control is performed according to an SPDF procedure;
• and
• wherein if the type of the access network is a mobile network access, the resource admission and control is performed according to a PCRF procedure;
• wherein the service request further carries information of a bearer control mode, the policy decision function unit is further configured to identify the bearer control mode according to the service request and select a corresponding service procedure for resource admission and control according to the bearer control mode;
• wherein the bearer control mode is used to indicate which manner the policy decision function unit employs to implement bearer control;
• and
• wherein the bearer control mode comprises one of the group consisting of push manner, pull manner, on-path manner and off-path manner.