Section: 4.4.1 E-UTRAN
Content: E-UTRAN is described in more detail in TS 36.300[ Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 ]  [5]. In addition to the E-UTRAN functions described in TS 36.300[ Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 ]  [5], E-UTRAN functions include: - Header compression and user plane ciphering and integrity protection (for user plane data sent across S1-U); - MME selection when no routing to an MME can be determined from the information provided by the UE; - UL bearer level rate enforcement based on UE-AMBR and MBR via means of uplink scheduling (e.g. by limiting the amount of UL resources granted per UE over time); - DL bearer level rate enforcement based on UE-AMBR; - UL and DL bearer level admission control; - Transport level packet marking in the uplink, e.g. setting the DiffServ Code Point, based on the QCI, and optionally the ARP priority level, of the associated EPS bearer; - ECN-based congestion control.