Question: In a scenario where Resource Sharing (ResShare) is supported by both BBERF and PCRF, how does the BBERF determine the common Guaranteed Bit Rate (GBR) value for QoS rules bound to the same bearer with the same sharing key value?
Option 1: The BBERF uses the lowest GBR value among those QoS rules as input for calculating the common GBR value.
Option 2: The BBERF calculates a weighted average of the GBR values from all applicable QoS rules.
Option 3: The BBERF uses the highest GBR value among those QoS rules, considering uplink and downlink separately.
Option 4: The BBERF relies on a predefined default GBR value for shared resources, ignoring individual QoS rule values.
Explanation: This is correct because, according to the ResShare feature's logic, when multiple QoS rules share resources (indicated by the same sharing key value and being bound to the same bearer), the BBERF must ensure sufficient bandwidth allocation. By selecting the highest GBR value among these rules for both uplink and downlink (which may originate from different QoS rules), the BBERF guarantees that the common resource reservation can accommodate the most demanding flow in each direction, thus preventing potential bottlenecks or service degradation.