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Overload Control Model Monitor: monitors SIP load and generates load samples (L). Control Function: implements overload control algorithm that decides when to throttle and to which extent. Uses load samples (L) and generates throttle commands (T). Actuator: controls the load that is forwarded to the downstream entity. Implements well-defined behavior for throttle commands (T). Implements algorithm to transition between throttle states. SIP Processor Actuator SIP Processor Monitor Control Function Upstream Entity Downstream Entity Overload Control SIP System (L) (T) (L) |