Default Quota of UGW9811

When a subscriber requests access to a service, the UGW9811 may block the subscribers packets from the moment when the subscriber applies for a quota to the moment when the quota is delivered, which affects user experience. If the default quota function is enabled on the UGW9811, the subscriber can use the default quota to access services during the period from the moment when the subscriber applies for quotas to the moment when the quotas are delivered. This ensures service continuity and improves user experience.

The default quota is applicable to the following quota application scenarios:

·         Quota application triggered by new services: When a subscriber requests to access a new service, the UGW9811 sends a CCR message to apply for quotas. Before the OCS server delivers new quotas, the subscriber can use the default quota and service packets can pass through the UGW9811 normally. If the default quota function is disabled, packets are blocked.

·         Quota application triggered by quota exhaustion: When the quota for a subscriber is insufficient, the UGW9811 sends a CCR message to apply for quotas. If the quota is exhausted before the OCS server returns a CCA message carrying new quotas, the subscriber can use the default quota to continue using the current service. If the default quota function is disabled, packets are blocked.

·         Quota application triggered by charging condition changes: When a charging condition changes, such as the SGSN/S-GW IP address, quality of service (QoS), radio access technology (RAT), or user location information (ULI), the UGW9811 sends a CCR message to apply for quotas. Before the OCS server delivers new quotas, the subscriber can use the default quota to continue using the current service. Which charging condition change will trigger a CCR message is determined by the local configurations on the UGW9811 and the information elements in the message from the OCS server. For details, see Configuring Conditions for the UGW9811 to Send CCR Messages. If the default quota function is disabled, the system uses the available quotas; if the quotas are exhausted, packets are blocked.

·         Quota application triggered by VT expiration: When the VT expires, the UGW9811 sends a CCR message to apply for quotas. Before the OCS server delivers new quotas, the subscriber can use the default quota to continue using the current service. If the default quota function is disabled, the system uses the available quotas; if the quotas are exhausted, packets are blocked.

·         Quota update triggered by an RAR message from the OCS server: When the OCS server sends an RAR message in a situation, (for example, after a subscriber recharges the account successfully), the UGW9811 sends a CCR message to apply for quotas. Before the OCS server returns a CCA message carrying new quotas, the subscriber can use the default quota to continue using the current service. If the default quota function is disabled, the system uses the available quotas; if the quotas are exhausted, packets are blocked.

A subscriber can use the default quota to access services before the OCS server delivers new quotas. After quotas are delivered successfully, the used default quota amount is deducted from the delivered quotas for the subscriber. For subscribers, the default quota function ensures service continuity and better user experience; for carriers, it helps attract more subscribers, improves the efficiency of network resource usage, and enhances competitiveness.

The following commands can be used to enable or disable the default quota function:

·         default-quota-switch: global quota switch.

·         default-quota-trigger: case-specific quota switch that takes effect only when the global quota switch is enabled.

Default quota function configurations determine how the UGW9811 processes packets.

·         In the scenario where the global default quota switch is disabled by using default-quota-switch:

The default quota function is disabled. The UGW9811 uses a common online charging procedure to process quotas.

§  If quota application is triggered by a new service or quota exhaustion, the UGW9811 blocks user packets until new quotas are delivered. This is because no quota is available in the interval between quota application (the CCR message is sent) and quota delivery (the CCA message is received).

§  If quota application is triggered by a PDP context/EPS bearer update, VT expiration, or re-authorization, packets still can be processed in the interval. This is because there may be unused quotas.

·         In the scenario where the global default quota switch is enabled by using default-quota-switch and case-specific quota switches are enabled by using default-quota-trigger:

The default quota function is enabled. The UGW9811 uses a common online charging procedure to process quotas.

The default quota function is used for service processing in the interval, ensuring service continuity.

·         In the scenario where the global default quota switch is enabled by using default-quota-switch and case-specific quota switches are disabled by using default-quota-trigger:

In this case, neither the default quota procedure nor the common online charging procedure is used.

The UGW9811 blocks packets until new quotas are delivered. This is because no quota is available in the interval. Configuration in this scenario is not recommended.