6.15 Energy efficiency

22.2613GPPRelease 18Service requirements for the 5G systemTS

6.15.1 Description

Energy efficiency is a critical issue in 5G. The potential to deploy systems in areas without a reliable energy source requires new methods of managing energy consumption not only in the UEs but throughout all components of the 5G system.

Small form factor UEs also typically have a small battery and this not only puts constrains on general power optimization but also on how the energy is consumed. With smaller batteries it is more important to understand and follow the limitations for the both the maximum peak and continuous current drain.

6.15.2 Requirements

The 5G access network shall support an energy saving mode with the following characteristics:

– the energy saving mode can be activated/deactivated either manually or automatically;

– service can be restricted to a group of users (e.g. public safety user, emergency callers).

NOTE: When in energy saving mode the UE’s and Access transmit power may be reduced or turned off (deep sleep mode), end-to-end latency and jitter may be increased with no impact on set of users or applications still allowed.

The 5G system shall support mechanisms to improve battery life for a UE over what is possible in EPS.

The 5G system shall optimize the battery consumption of a relay UE via which a UE is in indirect network connection mode.

The 5G system shall support UEs using small rechargeable and single coin cell batteries (e.g. considering impact on maximum pulse and continuous current).