This memo specifies the network element behavior required to deliver Controlled-Load service in the Internet. Controlled-load service provides the client data flow with a quality of service closely approximating the QoS that same flow would receive from an unloaded network element@ but uses capacity (admission) control to assure that this service is received even when the network element is overloaded.
RFC 2211-1997 history
1997RFC 2211-1997 Specification of the Controlled-Load Network Element Service