Procedures are a very important tool for describing and understanding how a telecommunication system works. Some procedures have already been described in previous chapters of this book, together with the presentation of the EPC key concepts. In this chapter, we provide a brief introduction to some additional procedures used in EPS. It should be noted, however, that it is not feasible within this book to include a complete description of all procedures that exist in EPS. Instead, we have chosen a few key procedures that should give a good overview of some of the most important use cases. Interested readers can consult the 3GPP technical specifications TS 23.060, 23.401, and 23.402 for complete descriptions.
In the first few ...