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1. (WO2018222098) METHOD AND POWER CONTROL UNIT FOR SUPPLYING ELECTRIC POWER TO A RADIO UNIT

Pub. No.:    WO/2018/222098    International Application No.:    PCT/SE2017/050590
Publication Date: Fri Dec 07 00:59:59 CET 2018 International Filing Date: Sat Jun 03 01:59:59 CEST 2017
IPC: H04W 52/02
H02J 7/00
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: HUMLA, Lars
ELEFTHERIADIS, Lackis
Title: METHOD AND POWER CONTROL UNIT FOR SUPPLYING ELECTRIC POWER TO A RADIO UNIT
Abstract:
A method and power control unit (300) for supplying electric power to a first radio unit (302) of a network node (304) in a wireless network (306). The power control unit (300) obtains (3:1) a scheduled power demand related to an amount of electric power required in the first radio unit (302) for transmissions scheduled in an imminent time interval such as a resource block or subframe. Then, electric power is supplied (3:2) to the first radio unit (302) from a power supply unit (308) if the power demand does not exceed a power threshold, or from the power supply unit (308) and a supplementary power source (310) if the power demand exceeds the power threshold. The supplementary power source (310) may comprise a battery that can be connected or disconnected (3:2A) for successive time intervals depending on the scheduled power demand which may fluctuate greatly depending on the first radio unit's (302) transmissions. Thereby, the power supply unit (308) can have less power capacity by being helped by the supplementary power source (310) when the power demand is high.