Service Context – Quota Settings Properties

You can define general quota properties and Adaptive Quota Management (AQM) properties for a service context.

If any quota values are specified for a service context, it is assumed that all properties are set. Therefore, all quota properties set for the default service context are ignored. It is an all-or-nothing specification.

General Quota Management Properties describes the general quota management properties.

Table 1. General Quota Management Properties
Property	Description
Quota Holding Time	The period of time, in seconds, of inactivity after which the network should report usage and release the remaining quota. MATRIXX reports this amount in the response message to the network. This value must be 0 or more. This property does not apply to IEC.
Quota Threshold	The amount of unused quota below which the network should send a request to reauthorize assets, based on the current usage. When the subscriber has less than this amount remaining from the authorized quantity, the network should send a request for additional assets. The value must be less than or equal to the Default or Reauthorization Authorized Quantity total. You can specify a Quota Threshold for each service context. If this property is specified and the value is not zero, Rating ensures that the appropriate quota threshold AVP (Time-Quota-Threshold for duration, Volume-Quota-Threshold for volume, or Unit-Quota-Threshold for service-specific) is set in the CCA message. The value set in the CCA message may be zero if the authorized quota size would be less than the configured value or if AQM is trying to reach a balance threshold exactly. Set this property only for services using SCUR, where ongoing usage is periodically reauthorized across many CCR messages.
Quota Threshold Unit	The measurement unit of the Quota Threshold, for example, bytes or kilobytes. MATRIXX sets the Quota Threshold value in bytes for data volume rating or in seconds for duration rating, even if the Quota Threshold Unit value is a higher unit. MATRIXX then converts the unit value. For service-specific quantities, for example, SMS, there is no unit conversion of the value. Set this property only for services using SCUR, where ongoing usage is periodically reauthorized across many CCR messages.
Default Quota Validity Time	The default number of seconds for which the authorized quota is valid. The GGSN must send a request at this time, regardless of whether the authorized amount has been used. Important: If you set this value for a service type, you must also set the Minimum Quota Validity Time and Maximum Quota Validity Time. If you do not set the Quota Validity Time values, the default values are used. This property does not apply to IEC.

Adaptive Quota Management Properties describes the AQM properties.

Note: In general, AQM attributes do not apply to Immediate Event Charging (IEC).

Table 2. Adaptive Quota Management Properties
Property	Description
Is Quota Adaptive?	Enables AQM functionality for quota authorizations. This property should only be set for services using Session Charging with Unit Reservation (SCUR), where ongoing usage is periodically reauthorized across many CCR messages.
Adaptive Threshold Use Min Auth?	AQM uses a minimum quota value in the following circumstances: The quota velocity is unknown. The balance velocity is unknown. The balance velocity is near a balance threshold. In such cases, the minimum quota value can be the configured Minimum Authorized Quantity or the computed minimum, which equals the quota velocity × the Minimum Quota Validity Time. This property indicates which minimum value to use. When this property is selected or the quota velocity is unknown, the Minimum Authorized Quantity is used. When this property is not selected (the default) and the quota velocity is known, the greater of the two values is used. Set this property only for services using SCUR, where ongoing usage is periodically reauthorized across many CCR messages.
Adaptive Threshold Use Min Auth After Time Change	When authorizing across a time change into a new balance or meter whose consumption is velocity, this property determines the AQM behavior. When this property is selected, AQM uses the Minimum value after the time change, which may prevent authorization across the time change and increase network traffic at that time. When this property is not selected, the quota can use the default quota across the time change regardless of the velocity, even if that might cross a balance threshold. Set this property only for services using SCUR, where ongoing usage is periodically reauthorized across many CCR messages.
Minimum Quota Validity Time	The period of time, in seconds, that sets a minimum baseline or target validity time before rating. Rating might result in a lower value in the Validity-Time AVP based on several factors. The GGSN should reauthorize service at this time, regardless of whether the authorized amount has been used. The Charging Server might send one or more Re-Authorization Request (RAR) messages to elicit a reauthorization, after which the session might be terminated. Important: If you set this value for a service type, you must also set the Default Quota Validity Time and Maximum Quota Validity Time. If you do not set any Quota Validity Time values, the default values are used. This property does not apply to Immediate Event Charging (IEC) and is used only when the Is Quota Adaptive property is selected (`true`).
Maximum Quota Validity Time	The maximum number of seconds for which the authorized quota is valid. Important: If you set this property for the service type, you must also set the Minimum Quota Validity Time and Default Quota Validity Time values. If you do not set the Quota Validity Time properties, the default values are used. This property does not apply to IEC.
Adaptive Threshold Scale Factor	This property controls the distance before a threshold at which the quota drops from default authorization or reauthorization values to the minimum authorization or reauthorization values. This property provides a buffer if additional subscribers unexpectedly request quota. The value must be more than or equal to 1.0. The threshold scale factor value in the balance template overrides the service or context type value. If neither value is set, the default value (1.0) is used. Set this property only for services using SCUR, where ongoing usage is periodically reauthorized across many CCR messages.