Cisco Cisco ASR 5000
Quality of Service (QoS) Management for SGSN
▀ Quality of Service Management
▄ SGSN Administration Guide, StarOS Release 18
2. Once the EPS bearer is activated, the Activate PDP Accept is sent by mapping the accepted QoS value as
described in Scenario-2.
Scenario-5:
Description of the scenario:
1. Attach is received from an EPC capable UE
2. The HLR subscription has EPS subscription data.
3. A secondary PDP context is activated with all QoS parameters set to “Subscribed” values.
2. The HLR subscription has EPS subscription data.
3. A secondary PDP context is activated with all QoS parameters set to “Subscribed” values.
QoS mapping for the scenario:
The SGSN sends a Bearer Resource Command with the following parameters:
1. Linked EPS Bearer ID = EPS bearer ID of linked Primary PDP
2. PTI = Transaction ID received from the MS (In MME, the received PTI is used in the NAS message as the PTI
2. PTI = Transaction ID received from the MS (In MME, the received PTI is used in the NAS message as the PTI
towards S-GW. But for the SGSN PTI is not there in the NAS message. The 3GPP TS is not clear on what the
SGSN should send as PTI, therefore TI is sent.
SGSN should send as PTI, therefore TI is sent.
Flow QoS:
1. QCI = Mapped from requested Traffic Class, if TC= conversational / streaming
2. MBR UL = APN-AMBR last received from P-GW for primary PDP activation
3. MBR DL = APN-AMBR last received from P-GW for primary PDP activation
4. GBR UL = APN-AMBR last received from P-GW for primary PDP activation
5. GBR DL = APN-AMBR last received from P-GW for primary PDP activation
6. Else, the values will be MBR UL = “0”, BR DL =“0”, GBR UL = “0”, GBR DL = “0”
2. MBR UL = APN-AMBR last received from P-GW for primary PDP activation
3. MBR DL = APN-AMBR last received from P-GW for primary PDP activation
4. GBR UL = APN-AMBR last received from P-GW for primary PDP activation
5. GBR DL = APN-AMBR last received from P-GW for primary PDP activation
6. Else, the values will be MBR UL = “0”, BR DL =“0”, GBR UL = “0”, GBR DL = “0”
References:
3GPP TS 23.401 Annexure E and 3GPP TS 29.274 (sections 8.15 and 8.16).
Scenario-6:
Description of the scenario:
1. Attach is received from an EPC capable UE
2. The HLR subscription has EPS subscription data.
3. A secondary PDP context is activated with all QoS parameters set to specified values.
2. The HLR subscription has EPS subscription data.
3. A secondary PDP context is activated with all QoS parameters set to specified values.
QoS mapping for the scenario:
The SGSN sends a Bearer Resource Command with the following parameters:
1. Linked EPS Bearer ID = EPS bearer ID of linked Primary PDP
2. PTI = Transaction ID received from the MS (In MME, the received PTI is used in the NAS message as the PTI
2. PTI = Transaction ID received from the MS (In MME, the received PTI is used in the NAS message as the PTI
towards S-GW. But for the SGSN PTI is not there in the NAS message. The 3GPP TS is not clear on what the
SGSN should send as PTI, therefore TI is sent.
SGSN should send as PTI, therefore TI is sent.
Flow QoS:
1. QCI = Mapped from requested Traffic Class, if TC= conversational or streaming.
2. MBR UL = Requested MBR UL, MBR DL = Requested MBR DL
3. GBR UL = Requested GBR UL, GBR DL = Requested GBR DL or GBR UL = “0”, GBR DL = “0”
2. MBR UL = Requested MBR UL, MBR DL = Requested MBR DL
3. GBR UL = Requested GBR UL, GBR DL = Requested GBR DL or GBR UL = “0”, GBR DL = “0”
References:
3GPP TS 23.401 Annexure E and 3GPP TS 29.274 (sections 8.15 and 8.16)
Scenario-7:
Description of the scenario:
1. Attach is received from an EPC capable UE
2. The HLR subscription does not have EPS subscription data.
3. A secondary PDP context is activated with all QoS parameters set to “Subscribed”.
2. The HLR subscription does not have EPS subscription data.
3. A secondary PDP context is activated with all QoS parameters set to “Subscribed”.
QoS mapping for the scenario: