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EPC and 4G Packet Networks, 2nd Edition by Catherine Mulligan, Magnus Olsson

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Chapter 10

Subscriber Data Management

An important area for mobile operators, but sometimes not very visible, is Subscriber Data Management (SDM). SDM is a term that may have different meanings in different contexts, but it is used here to describe the subscription handling for all processes related to, for example, privacy, authentication, authorization, policy control, and mobility management of end-users. Sometimes this is also referred to as User Data Management (UDM).

In mobile networks there are many functions and processes that require subscription-related information. The most obvious example of user subscription data that is used in LTE/EPC networks may be the user identity and security credentials that are required when an end-user device ...

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