Cisco Cisco ASR 5000
Quality of Service (QoS) Management for SGSN
Quality of Service Management ▀
SGSN Administration Guide, StarOS Release 18 ▄
ARP configured in CC Profile
The QoS configured in the Call Control Profile is used if the S4 interface is chosen for PDP activation, but the
subscription does not have an EPS subscription. Therefore, GPRS subscription data (which uses QoS in pre-release 8
format), will be mapped to EPS QoS. The Allocation and Retention policy will be mapped to EPS ARP using the
configuration in the Call Control Profile.
subscription does not have an EPS subscription. Therefore, GPRS subscription data (which uses QoS in pre-release 8
format), will be mapped to EPS QoS. The Allocation and Retention policy will be mapped to EPS ARP using the
configuration in the Call Control Profile.
If the QoS mapping configuration is not used, the following default mappings are used:
Default ARP high-priority value = 5.
Default ARP medium-priority value = 10.
Default pre-emption capability = shall-not-trigger-pre-emption.
.Default pre-emption vulnerability = not pre-emptable
The mapping is configured through the following CLI command:
config
call-control-profile <profile_name>
qos { gn-gp | ue-ambr } qos gn-gp { arp high-priority priority medium-priority priority |
pre-emption { capability { may-trigger-pre-emption | shall-not-trigger-pre-emption } |
vulnerability { not-pre-emptable | pre-emptable }
pre-emption { capability { may-trigger-pre-emption | shall-not-trigger-pre-emption } |
vulnerability { not-pre-emptable | pre-emptable }
exit
The mapping of these configured values to EPC ARP is given in below, this table is present 3GPP TS 23.401:
Table 29. Mapping of Release 99 bearer parameter ARP to EPS bearer ARP
Release 99 bearer parameter ARP value EPS bearer ARP priority value
1
1
2
H + 1
3
M + 1
In the above table H = High-priority value configured and M = Medium-priority value.
ARP-RP Mapping for Radio Priority in Messages
The SGSN can choose a preferred radio priority according to the ARP values sent by the GGSN and HLR using the
ARP to RP mapping. These mappings will be used by the corresponding 2G and/or 3G services to choose the radio
priority value while triggering messages (such as those listed below) towards the MS/UE:
ARP to RP mapping. These mappings will be used by the corresponding 2G and/or 3G services to choose the radio
priority value while triggering messages (such as those listed below) towards the MS/UE:
Activate PDP Accept.
Modify PDP Request during network-initiated PDP modification procedure.
Modify PDP Accept during MS-initiated PDP modification procedure provided the ARP has been changed by the
network.
network.