4 Overview

29.5983GPPRelease 18TSUnstructured data storage services

The UDSF, as depicted in Figure 4.1-1 below, is described in clause 4.2.5 of 3GPP TS 23.501 [2]. Any of the 5GS NFs can make use of the UDSF to store and retrieve unstructured data, i.e., data that is not defined in 3GPP specifications, and can make use of the UDSF to run timers and get notified on timer expiry. The UDSF is deployed in the same network where the CP NF is located and the same UDSF may be shared by all the NFs in the PLMN to store/retrieve their respective data or an NF may have its own UDSF depending on operator configuration.

NOTE 1: Structured data in this specification refers to data for which the structure is defined in 3GPP specifications. Unstructured data refers to data for which the structure is not defined in 3GPP specifications.

Figure 4.1-1: Reference model – UDSF