e peak data rate (thus more than a 2G implementation using GSM) but instead to have other reductions compared to Release 12 category 0 UE such as smaller supported maximum RF bandwidth, down to 1.4 MHz, Data transmit/receive Data transmit/receive Attach/connection set-up Service request UE off Power Saving Mode (PSM) Figure 3.1 Release 12 power saving mode (PSM) operation LTE Small Cell Optimization Figure 3.2 Example M2M modems HSPA (left) and LTE (right) (courtesy of Gemalto) or even 200 kHz, instead of full 20 MHz. All devices abovementioned including Release 12 support the maximum 20 MHz bandwidth, as long as the 20 MHz bandwidth is part of the supported bandwidths in 3GPP specifications for the specific frequency band in use. The intention is to further narrow the gap with cost when compared to the 2G implementation based on GSM/GRPS technology or compared with the more capable HSPA+ modem (including also GSM capability), such as the one shown in Figure 3.2 with 80-pin connector. An example of the narrowband operation is shown in Figure 3.3, with the MTC LTE UE supporting only 1.4 MHz being operated as part of the larger bandwidth. In such a case, the normal UE categories could be scheduled in any part of the 20 MHz carrier but the MTC UEs with limited RF bandwidth would be listening only to the part of the carrier where they are assigned. The 3GPP needs still also to solve how to handle the control signalling reception, Release 8 PDCCH Release 11 EPDCCH PSD boosting EPDCCH (UE1) EPDCCH (UE2) EPDCCH (UE1) PDSCH (UE1) PDSCH (UE1) PDSCH (UE2) 1 ms sub-frame Figure 3.3 LTE-M operation using 1.4 MHz bandwidth with the 20 MHz system bandwidth LTE-Advanced Evolution in Releases 12-13 including reception of common control for all UEs (System Information Blocks, SIBs) in such a way that the existing devices do not get any significant performance impact. The UE-specific physical layer downlink control signalling with LTE-M with narrow RF bandwidth is based on the Release 11 Enhanced DPCCH (EDPCCH), which allows sendi