name: DNN
full_form: Data Network Name
context: policies. But it is applicable only in the UE initially accessing via 5GS scenario. This Rel 17 work item specifies a mechanism to achieve the same PCF selection for AMF and SMF in the EPS to 5GS mobility scenario, where the PCF selection for AMF may be performed after the PCF selection for SMF/PGW-C. In this WI, subscription data is expanded to assist the same PCF selection, to offer more flexibility for operation of corresponding service. The mechanism in this WI is based on the PGW-C+SMF registration of the selected PCF for SM Policy Control into the UDM+HSS. When performing PCF selection, based on subscription data for the PCF selection received from the UDM, the AMF determines that the same PCF for AMF and the SMF serving a specific DNN and/or S-NSSAI needs to be selected, then it selects the PCF ID serving the specific DNN and/or S-NSSAI received from UDM before initiating the Establishment of AM Policy Association. It is applicable for EPS to 5GS Mobility. For the scenario of
description: A Data Network Name (DNN) refers to a specific network or service within the telecommunications infrastructure, often used in conjunction with other identifiers like S-NSSAI to uniquely identify and manage network services.
explanation: The text explicitly states that DNN is used to identify 'specific networks or services' within the telecommunications infrastructure, aligning it with the definition of a Network.
section_title: 17.2	Same PCF selection for AMF and SMF
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