Cisco Cisco ASR 5000
Quality of Service (QoS) Management for SGSN
▀ Quality of Service Management
▄ SGSN Administration Guide, StarOS Release 18
Figure 73. QoS Mapping from SGSN to UE/RNC
QoS Handling Scenarios
Listed below are various QoS handling scenarios and QoS Mapping for each of the scenarios:
Scenario-1:
Description of the scenario:
1. Attach is received from an EPC capable UE.
2. The HLR subscription does not have EPS subscription data. Only GPRS subscription is present.
3. Activate a PDP context with all QoS parameters set to “subscribed”.
2. The HLR subscription does not have EPS subscription data. Only GPRS subscription is present.
3. Activate a PDP context with all QoS parameters set to “subscribed”.
QoS mapping for the scenario:
If S4 is the selected interface, then the subscribed MBR is mapped to APN AMBR. The EPS bearer QoS MBR is set to
subscribed MBR (for conversational and streaming class bearers). For non-GBR bearers the EPS bearer QoS MBR is set
to “0”. If the traffic class is conversational or streaming, then the EPS bearer QoS GBR is set to subscribed GBR.
subscribed MBR (for conversational and streaming class bearers). For non-GBR bearers the EPS bearer QoS MBR is set
to “0”. If the traffic class is conversational or streaming, then the EPS bearer QoS GBR is set to subscribed GBR.
A detailed list of mapping:
1. APN AMBR = Subscribed MBR
2. Bearer QoS – PVI = Taken from local policy [use call-control-profile qos gn-gp config]
3. Bearer QoS – PCI = Taken from local policy [use call-control-profile qos gn-gp config]
4. Bearer QoS – PL = Taken from local policy [use call-control-profile qos gn-gp config]
5. Bearer QoS – QCI = Mapped from subscribed traffic class
6. Bearer QoS – MBR UL and DL = Mapped from subscribed MBR + MBR-Extended for UL and DL
7. Bearer QoS – GBR UL and DL = Zero for interactive or background traffic. For streaming or conversational it is
mapped from subscribed GBR + Ext.GBR UL / DL
References: