Patent attributes
In general, this disclosure describes usage monitoring techniques. In one example, a method comprises storing, by a monitoring device that performs usage monitoring for at least one packet flow that traverses an access network by which subscriber devices access a packet data network, data indicating an amount of unused granted service units for the at least one packet flow that is unused as of a policy rule deactivation time for one or more policy rules matched by the at least one packet flow. The monitoring device further reactivates the usage monitoring for the at least one packet flow at a policy rule reactivation time for the one or more policy rules matched by the at least one packet flow based on an updated amount of granted service units, wherein the updated amount of granted service units are based on the data indicating the amount of unused granted service units.
