L.1 Introduction

23.4013GPPGeneral Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) accessRelease 18TS

The EPS Optimised for CIoT includes the support of the following characteristics:

– Ultra low UE power consumption.

– Large number of devices per cell.

– Narrowband spectrum RATs.

– Enhanced coverage level.

The EPS Optimised for CIoT supports traffic patterns that is different as compared to the normal UEs and may support only sub-set and necessary functionalities as compared with the existing EPS.

An EPS Optimised for CIoT can be enabled by having sub-set of functionalities implemented in single logical entity C-SGN (CIoT Serving Gateway Node). C-SGN is described in clause L.4. Mobility and Attach procedures are performed as described in other clauses for corresponding entities MME, S-GW and P-GW.

The Core Network node involved in the EPS Architecture optimised for CIoT can be deployed as DCNs within a PLMN.