In the Logical Layered Architecture (LLA) of TMN [1], Network-OSFs (N-OSF) are concerned with the management function on Network Management Level (NML), and Element-OSFs (E-OSF) with the management function on Element Management Level (EML). These two logical layers respectively play the role of Network Management Function (NMF). This report provides Element Management Layer (EML) operation system functions and function sets. The content is associated with the 3GPP TS 32.xyz-series.

The present document identifies and defines the needs in the E-OSFs. The intention is not to define new requirements for the eventual standardization of new Interface IRP or NRM IRP and/or System Context. The present document proposes to define the E-OSFs including the following main aspects:

• Define functional scope of Element-OSF (E-OSF)
• Define functional requirement of Elements-OSF (E-OSF)

The present document identifies a set of functions require by operators to operate mobile networks. By identifying these functional capabilities and then comparing them with the 3GPP IRP capabilities, widely used functions and omissions in the 3GPP set of IRPs are indicated. Change Requests and new IRPs are expected to be created in order to narrow the functional gap.