The throttling feature is a powerful tool used to protect an HLR from peak overload. Throttling helps regulate the amount of traffic going to a particular HLR.
The throttling rule is a highly configurable and flexible algorithm used to select incoming messages going to the HLR. The throttling rule consists of a set of configurable criteria (conditions) on which the HLR selects the incoming message for further throttling treatment. Up to one thousand throttling rules can be defined, in any combination and configuration, depending on the reason and the purpose for the throttling. The HLR selects an incoming message; if it matches one of the active throttling rules, it applies the throttling treatment specified by the rule. Throttling treatment can include discarding the selected incoming message and not sending it to the HLR.
Any updates to throttling rules have an immediate impact on message processing, and there is no need to stop/re-start the application.