Content for  TS 23.503  Word version:  19.1.0

The purpose of the PDU Session related policy information is to provide policy and charging control related information that is applicable to a single Monitoring key or the whole PDU Session respectively. The PCF may provide PDU Session related policy information to the SMF together with PCC rules or separately. Table 6.4-1 includes the PDU Session related policy information. The differences with Table 6.4 and Table 6.6 in TS 23.203 are shown, either "none" means that the IE applies in 5GS or "removed" meaning that the IE does not apply in 5GS, this is due to the lack of support in the 5GS for this feature or "modified" meaning that the IE applies with some modifications defined in the IE.

Upon the initial interaction with the SMF, the PCF may provide the following attributes to the SMF: The Charging information contains addresses of the CHF that manages charging for the PDU Session and optionally the associated CHF instance ID and CHF set ID (see clause 6.3.1.0 of TS 23.501). If received, the SMF shall apply it as defined in clause 6.3.11 of TS 23.501. The Default charging method indicates what charging method shall be used in the PDU Session for every PCC rule where the charging method identifier is omitted, including predefined PCC rules that are activated by the SMF. If received by the SMF, it supersedes the Default charging method in the charging characteristics profile. The PDU Session with offline charging only can be assigned to a PDU Session by the PCF to indicate that the online charging method is never set for any of the PCC Rules activated during the lifetime of the PDU Session nor provided as Default charging method. The IP Index indicates the IP Address/Prefix allocation method which is used by the SMF for IP Address/Prefix allocation during PDU Session Establishment procedure as defined in clause 5.8.2.2.1 of TS 23.501. Upon every interaction with the SMF, the PCF may provide the following attributes to the SMF: The Revalidation time limit defines the time period within which the SMF shall trigger a request for PCC rules for an established PDU Session. The Reflective QoS Timer defines the lifetime of a UE derived QoS rule belonging to the PDU Session. It is used in the UE as defined in clause 5.7.5.3 of TS 23.501. The Authorized Session-AMBR defines the UL/DL Aggregate Maximum Bit Rate for the Non-GBR QoS Flows of the PDU Session, which is enforced in the UPF as defined in clause 5.7.1 of TS 23.501. The PCF may provide the Authorized Session-AMBR in every interaction with the SMF. When the SMF receives it from the PDU Session policy, it is provided to the UPF over N4 interface for the enforcement. The Authorized default 5QI/ARP defines the 5QI and ARP values of the QoS Flow associated with the default QoS rule as described in clause 6.2.2.4. The PCF may provide a 5QI Priority Level according to clause 5.7.3.3 of TS 23.501 together with the Authorized default 5QI, when a 5QI Priority Level value different from the standardized Default Priority Level value in the QoS characteristics Table 5.7.4-1 of TS 23.501 is required. The SMF applies the Authorized default 5QI/ARP also for the QoS Flow binding as described in clause 6.1.3.2.4. The Time Condition and Subsequent Authorized Session-AMBR / Subsequent Authorized default 5QI/ARP are used together and up to four instances with different values of the Time Condition parameter may be provided by the PCF. Time Condition indicates that the associated Subsequent Authorized Session-AMBR/ Subsequent Authorized default 5QI/ARP is only applied when the time defined by this attribute is met. The PCF may provide a 5QI Priority Level according to clause 5.7.3.3 of TS 23.501 together with the Subsequent Authorized default 5QI, when a 5QI Priority Level value different from the standardized Default Priority Level value in the QoS characteristics Table 5.7.4-1 of TS 23.501 is required. When the SMF receives a Time Condition and Subsequent Authorized Session-AMBR/ Subsequent Authorized default 5QI/ARP pair, it stores it locally. The SMF shall discard any previously received Subsequent Authorized Session-AMBR / Subsequent Authorized default 5QI/ARP instances on explicit instruction as well as whenever the PCF provides a new instruction for one or more Subsequent Authorized Session-AMBR / Subsequent Authorized default 5QI/ARP. When the time defined by the Time Condition parameter is reached, the SMF shall apply (or instruct the UPF to apply) Subsequent Authorized Session-AMBR/ Subsequent Authorized default 5QI/ARP. The Monitoring Key is the reference to a resource threshold. Any number of PCC Rules may share the same monitoring key value. The monitoring key values for each service shall be operator configurable. It shall also be possible for an operator to use the Monitoring Key parameter to indicate usage monitoring on an PDU Session level or, in the case of an MA PDU Session, to indicate usage monitoring on PDU Session level for the 3GPP access and/or the Non-3GPP access. Usage monitoring on PDU Session level is active when a PDU Session is active when a Monitoring Key for the PDU Session and a corresponding volume and/or time threshold value have been provided to the SMF. Usage monitoring on Monitoring key level is active when a volume and/or time threshold has been provided for a Monitoring Key to the SMF and there is at least one PCC rule active for the PDU Session that is associated with that Monitoring Key. The Volume threshold indicates the overall user traffic volume value after which the SMF shall report the Usage threshold reached trigger to the PCF. The Time threshold indicates the overall resource time usage after which the SMF shall report the Usage threshold reached trigger to the PCF. The Monitoring time indicates the time at which the SMF shall store the accumulated usage information. The Subsequent Volume threshold indicates the overall user traffic volume value measured after Monitoring time, after which the SMF shall report the Usage threshold reached trigger to the PCF. The Subsequent Time threshold indicates the overall resource time usage measured after Monitoring time, after which the SMF shall report the Usage threshold reached trigger to the PCF. The Inactivity Detection Time indicates the period of time after which the time measurement shall stop, if no packets are received during that time period. The Port Management Information Container carries Ethernet or IP port management information for an Ethernet/IP port located in DS-TT or NW-TT. The port for which the container is provided is identified by the port number. The User plane node Management Information Container carries User plane node management information for a 5GS Bridge or Router. The VPLMN specific offloading policy carries the attributes for the traffic to be offloaded to the local part of DN in VPLMN. The following attributes under this policy is applicable only for the serving VPLMN. When the H-SMF receives it from PCF and HR-SBO is authorized, H-SMF shall generate VPLMN Specific Offloading Information based on this policy to the V-SMF as described in clause 6.7.2.2 of TS 23.548. The V-SMF may use this information to configure V-EASDF, ULCL/BP UPF and Local UPF. The IP range(s) indicates one or more IPv4/IPv6 address range(s) that are allowed to be offloaded to the local part of the DN in VPLMN when the PDU Session is authorized for HR-SBO. The FQDN(s) indicates one or more FQDN or FQDN range expressed by regular expression that are allowed to be offloaded to the local part of the DN in VPLMN when the PDU Session is authorized for HR-SBO. The Authorized DL Session AMBR for Offloading defines the DL Aggregate Maximum Bit Rate for the Non-GBR QoS Flows applicable for the local traffic offloaded to the local part of DN in VPLMN of the PDU Session for HR-SBO. The Offload Identifier is used to identify a certain VPLMN Specific Offloading Information to be generated based on this VPLMN Specific Offloading Policy and can be used in any subsequent HR-SBO PDU Sessions between V-SMF(s) and H-SMF(s), see details in clause 6.7.2 of TS 23.548. The Local Offloading Policy carries the attributes for the traffic to be offloaded to the local part of DN when Local Offloading Management of Edge Computing is supported for the non-roaming PDU Session. The IP range(s) indicates one or more IPv4/IPv6 address range(s) that are allowed to be offloaded to the local part of the DN for Local Offloading Management. The FQDN(s) indicates one or more FQDN or FQDN range expressed by regular expression that are allowed to be offloaded to the local part of the DN for Local Offloading Management.

To enable the enforcement in the 5GC system of the access and mobility policy decisions made by the PCF for the control as described in clause 6.1.2.1, the 5GC system may provide the Access and mobility related policy information from the PCF to the AMF. Table 6.5-1 lists the AMF access and mobility related policy information.

  The list of allowed TAIs indicates the TAIs where the UE is allowed to be registered, see clause 5.3.4 of TS 23.501 for the description on how AMF uses this information. The list of non-allowed TAIs indicates the TAIs where the UE is not allowed to be registered, see clause 5.3.4 of TS 23.501 for the description on how AMF uses this information. The Maximum number of allowed TAs indicates the maximum number of allowed Tracking Areas, the list of TAI is defined in the AMF and not explicitly provided by the PCF. The RFSP Index for Allowed NSSAI and RFSP Index for Target NSSAI defines the RFSP Index for radio resource management functionality. RFSP Index in Use Validity Time defines the time for which the RFSP Index in use will be used in MME after 5GS to EPS mobility as specified in clause 5.17.2.2 of TS 23.501. The UE-AMBR limits the aggregated bit rate across all Non-GBR QoS Flows of a UE in the serving network. The list of UE-Slice-MBR defines the list of authorized UE-Slice-MBR allocated for a UE, how it is enforced is described in clause 5.7.1.10 of TS 23.501. The DNN replacement of unsupported DNNs indicates that the AMF shall contact the PCF for replacement of an unsupported DNN requested by the UE. The List of S-NSSAIs defines the S-NSSAIs, valid in the serving network, of the Allowed NSSAI that contain DNN candidates for replacement by PCF. The List of DNNs defines the DNN candidates for which the AMF shall contact the PCF for replacement if such a DNN is requested by a UE. The 5G access stratum time distribution indicates the 5G access stratum time distribution parameters to be indicated to the NG-RAN via AMF. The S-NSSAI availability information indicates whether the S-NSSAI is not available or is available, and/or an alternative S-NSSAI that the S-NSSAI can be replaced with. The Charging information includes CHF address(es) and if available, the associated CHF instance ID(s) and/or CHF set ID(s). This is described in detail in clause 6.3.11 of TS 23.501 and in clause 6.1.1.4.