Reducing the energy consumption of radio access networks is a critical focus for 5G-focused R&D efforts, both by individual companies and standards bodies. Two of the most important in the latter group, the UN’s ITU and Europe’s ETSI, have agreed a standard to measure the energy efficiency of RANs, in order to offer a uniform evaluation of live networks. The standard is called ‘Energy efficiency measurement and metrics for telecommunication network’ (or ITU-T L.1330), and was developed by the ITU-T Study Group 5 and ETSI Technical Committee on Environmental Engineering, in liaison with the 3GPP and the GSMA. The equivalent ETSI title is ES 203 228. The ITU says that the standard takes into account that overall energy efficiency optimization…