5.28a.2 Transfer of TL-Container between SMF/CUC and AN-TL and CN-TL

If NG-RAN and UPF support AN-TL and CN-TL, the SMF/CUC may use the TL-Container to send a:

• get-request.
• set-request: submits the following information elements to the AN-TL or CN-TL:
• InterfaceConfiguration as described in Annex M, clause M.1 (one InterfaceConfiguration is associated with each QFI in the N3 tunnel)
• Interface ID Group.
• TN Stream Identification Information for DataFrameSpecification.
• TN Stream Identification Information for mask-and-match.
• Interval (only provided together with TimeAwareOffset).
• MaxFrameSize (only provided together with TimeAwareOffset).

The AN-TL or CN-TL may use the TL-Container to send a:

• get-response: indicates the following elements of the Talker or Listener group from the AN-TL or CN-TL:
• EndStationInterfaces: list of InterfaceIDs.
• InterfaceCapabilities.
• Buffer capability: maximum possible buffer duration for a packet of a stream with the maximum size of an Ethernet packet (1522 Bytes) that is supported by the AN-TL / CN-TL when acting as a Talker.
• set-response: reports the processing results for the corresponding set-request to the SMF/CUC.

Details on the TL-Container information are provided in Table M.2-1 of clause M.2.

The SMF/CUC may request the NG-RAN/UPF to report AN-TL or CN-TL information by including a TL-Container with a get-request to the AN-TL or CN-TL, respectively. The get-request is sent to AN-TL in the N2 SM information and to CN-TL in the N4 Session Establishment as described in clause 4.3.2.2 of TS 23.502 [3].

If the NG-RAN/UPF supports AN-TL/CN-TL, the NG-RAN/AN-TL and UPF/CN-TL responds with a TL-Container including the elements defined for the get-response.

The SMF/CUC may submit TL-Container including a set-request the elements defined for the set-request to NG-RAN/AN-TL and UPF/CN-TL. The set-request is sent to AN-TL in the N2 SM information and to CN-TL in the N4 Session Modification request as described in clause 4.3.3.2 of TS 23.502 [3]. The SMF/CUC shall initiate to the CN-TL/AN-TL the deletion of TN stream configurations as described in 4.3.4.2 of TS 23.502 [3].

The InterfaceConfiguration is associated with the corresponding QFI in the N3 tunnel in the NG-RAN or UPF, respectively. The AN-TL/CN-TL uses the provided configuration for the traffic in the QoS Flow of the given QFI as described in Annex M.