Content for  TS 23.402  Word version:  18.3.0

When the QoS Policy rules provided by the PCRF to the Serving Gateway in step A.1 of Figure 5.4.1-1 above results in the Serving Gateway to decide to modify the QoS of an already existing bearer, this procedure is applied. QoS modification may result in a bearer modification in the E-UTRAN access. The procedure depicted in Figure 5.4.1-1 applies to this case as well. On receiving message A.1, the Serving-GW uses this QoS policy to determine that traffic flow(s) shall be aggregated to or removed from an active bearer. The Serving-GW generates the TFT and updates the EPS Bearer QoS to match the aggregated set of traffic flows. The Serving-GW then follows the procedure shown in clause 5.4.2 of TS 23.401 by sending the Update Bearer Request (EPS Bearer QoS, TFT) message to the MME. The message descriptions for A.1, B.1 and B.2 in clause 5.4.1 apply to this procedure as well. The steps between A.1 and B.1 are described in clause 5.4.2.1 of TS 23.401.

The HSS Initiated Subscribed QoS Modification for a PMIP-based S5/S8 is depicted in Figure 5.4.3.2-1.

After Step A.1, the Serving-GW follows the procedure shown in clause 5.4.2.1 of TS 23.401 by sending the Update Bearer Request message to the MME. The procedure is completed when the Serving-GW receives a Update Bearer Response from the MME in Step 10 of clause 5.4.2.1 of TS 23.401.

When the QoS Policy rules provided by the PCRF to the Serving Gateway in step A.1 of Figure 5.4.1-1 above results in the Serving Gateway to decide to deactivate an existing dedicated bearer, this procedure is applied. The procedure depicted in Figure 5.4.1-1 applies to this case as well. On receiving message A.1, the Serving-GW uses this QoS policy to determine that a dedicated bearer needs to be deactivated, the Serving-GW follows the procedure shown in clause 5.4.4 of TS 23.401 by sending the Delete Bearer Request message to the MME. If the S-GW determines that the default bearer needs to be deactivated, the S-GW follows the procedure specified in clause 5.6.2.1. The message descriptions for A.1, B.1 and B.2 in clause 5.4.1 apply to this procedure as well. The steps between A.1 and B.1 are described in clause 5.4.4.1 of TS 23.401.

This clause contains the procedure steps that vary between the GTP and PMIP variant of S5 and S8 for the procedure defined in clause 5.4.4.2 of TS 23.401 for -MME initiated dedicated bearer deactivation.

This procedure applies to the Non-Roaming (Figure 4.2.1-1), Roaming (Figure 4.2.1-2) and Local Breakout (Figure 4.2.3-4) cases. For the Roaming and Local Breakout cases, the vPCRF forwards messages between the Serving-GW and the hPCRF. In the Local Breakout case, the vPCRF forwards messages between the PDN-GW and the hPCRF. The optional interaction steps between the gateways and the PCRF in the procedures in Figure 5.4.5.3-1 only occur if dynamic policy provisioning is deployed. Otherwise policy may be statically configured with the gateway. Before Step A.1, the procedure shown in clause 5.4.4.2 of TS 23.401 is followed and the Serving-GW receives a Delete Bearer Command message from the MME.