Cisco Cisco ASR 5000
Quality of Service (QoS) Management for SGSN
Quality of Service Management ▀
SGSN Administration Guide, StarOS Release 18 ▄
3. The Negotiated QoS is mapped to EPC QoS as per the mapping table in 3GPP TS 23.203 Table 6.1.7 and 3GPP
TS 23.401 Annexure E.
4. The mapped values are sent in Create Session Request to the SGW or PGW.
5. The PGW is allowed to change the APN-AMBR value in Create Session Response.
6. The SGSN accepts the APN-AMBR value sent by the PGW. No further negotiation happens as described in
5. The PGW is allowed to change the APN-AMBR value in Create Session Response.
6. The SGSN accepts the APN-AMBR value sent by the PGW. No further negotiation happens as described in
3GPP TS 23.060 section 9.2.2.1A, list item “d”.
7. The S4-SGSN maps the received the APN-AMBR to MBR value as per the mapping table described in 3GPP TS
23.203 table 6.1.7 and 3GPP TS 23.401 Annexure “E”.
8. The mapped MBR values are sent to the RNC in RAB assignment request and in Activate Accept to UE.
QoS Handling During Secondary PDP Activation
QoS Handling When EPS Subscription is Available
1. The Requested QoS is mapped to EPC QoS and sent in the Bearer Resource Command to the SGW or PGW.
2. If the traffic class requested is a non-GBR traffic class (interactive / background), the per bearer MBR / GBR
2. If the traffic class requested is a non-GBR traffic class (interactive / background), the per bearer MBR / GBR
values sent in Bearer Resource Command will all be zeroes.
3. The PGW sends a Create Bearer Request to the SGW or SGSN.
4. The SGSN sends a RAB assignment request to the RNC by mapping QoS as follows:
4. The SGSN sends a RAB assignment request to the RNC by mapping QoS as follows:
• If the bearer is a non-GBR: The APN-AMBR is mapped to MBR values and GBR is set to “0”.
• If the bearer is GBR: The MBR / GBR values received in Create Bearer Request are sent to RNC / UE
• If the bearer is GBR: The MBR / GBR values received in Create Bearer Request are sent to RNC / UE
in the Secondary Activate Accept.
QoS Handling When Only GPRS Subscription is Available
1. The Requested QoS from the UE and the Subscribed QoS are negotiated. The SGSN chooses the least of the two
values as the negotiated output. If the Requested QoS is mentioned as the Subscribed QoS, then the SGSN
chooses the Subscribed QoS as is, if local QoS capping is not configured.
chooses the Subscribed QoS as is, if local QoS capping is not configured.
2. The Requested QoS is mapped to the EPC QoS and sent in the Bearer Resource Command to the SGW or PGW.
3. If the traffic class requested is a non-GBR traffic class (interactive / background), the per bearer MBR / GBR
3. If the traffic class requested is a non-GBR traffic class (interactive / background), the per bearer MBR / GBR
values sent in Bearer Resource Command will be all zeroes.
4. The PGW sends a Create Bearer Request to SGW or SGSN.
5. The SGSN sends a RAB assignment request to the RNC by mapping QoS as follows:
5. The SGSN sends a RAB assignment request to the RNC by mapping QoS as follows:
• If the bearer is non-GBR: The APN-AMBR is mapped to MBR values and the GBR value is set to “0”.
• If the bearer is GBR: The MBR / GBR values received in the Create Bearer Request will be sent to
• If the bearer is GBR: The MBR / GBR values received in the Create Bearer Request will be sent to
RNC / UE in Secondary Activate Accept.
MS Initiated QoS Modification
The MS sends a Modify PDP Context Request (TI, QoS Requested, TFT, and Protocol Configuration Options)
message to the SGSN. Either QoS Requested or TFT or both may be included. The QoS Requested indicates
the desired QoS profile, while the TFT indicates the TFT that is to be added or modified or deleted from the
PDP context. Protocol Configuration Options may be used to transfer optional PDP parameters and/or requests
to the PGW.
the desired QoS profile, while the TFT indicates the TFT that is to be added or modified or deleted from the
PDP context. Protocol Configuration Options may be used to transfer optional PDP parameters and/or requests
to the PGW.
The SGSN identifies the bearer modification scenario that applies and sends the Bearer Resource Command
(TEID, LBI, PTI, EPS Bearer QoS (excluding ARP), TFT, EBI, RAT type, Protocol Configuration Options,
serving network identity, CGI/SAI, User CSG Information, MS Info Change Reporting support indication, DL
TEID and DL Address, DTI) message to the selected Serving GW.
serving network identity, CGI/SAI, User CSG Information, MS Info Change Reporting support indication, DL
TEID and DL Address, DTI) message to the selected Serving GW.