1. Technical Report for BS and UE radio transmission and reception (Release 13) https://www.3gpp.org/dynareport/36802.htm 2017
2. 3GPP Service Requirements for Machine-Type Communications (MTC) http://www.3gpp.org 2014
3. 3GPP Cellular system support for ultra-low complexity and low throughput Internet of Things (CIoT) https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=2719 2016a
4. 3GPP Standardization of NB-IOT completed https://www.3gpp.org/news-events/1785-nb_iot_complete 2016b
5. 3GPP Study on the security aspects of the next generation system 2017