US 2016/0242128 A1 · POWER CONTROL AND POWER HEADROOM REPORTING FOR DUAL CONNECTIVITY

Abstract

The present disclosure relates to a method for efficiently performing power control in situations where the UE is connected to both a MeNB and SeNB. The MeNB determines a power distribution ratio for the power to be used by the UE for uplink transmission to the MeNB and SeNB, determines the parameters PEMAX,MeNB and PEMAX,SeNB and sends these parameters to the SeNB/UE for use in power control. Moreover, update of the power distribution ratio is performed by the MeNB with assistance by the UE, which provides the MeNB with information on the pathloss on the secondary radio link to the SeNB, preferably by transmitting a virtual power headroom report, regarding the secondary radio link to the SeNB, to the MeNB, from which the MeNB derives the information on the pathloss for the secondary radio link.

Claims15

Dependent claims

A method for power headroom reporting in a mobile communication system, wherein a mobile station is connected via a first radio link to a master base station and at least to one secondary base station via a secondary radio link, the method comprising:

calculating by the mobile station a first power headroom report for the first radio link between the mobile station and the master base station;
transmitting the calculated first power headroom report together with information allowing the master base station to determine information on the pathloss of the secondary radio link between the mobile station and the secondary base station, from the mobile station to the master base station;
and
calculating by the mobile station a secondary power headroom report for the secondary radio link between the mobile station and the secondary base station, and transmitting the calculated secondary power headroom report from the mobile station to the secondary base station.

1 more element

A mobile station for power headroom reporting in a mobile communication system, wherein the mobile station is connectable via a first radio link to a master base station and at least to one secondary base station via a secondary radio link, the mobile station comprising:

a processor adapted to calculate a first power headroom report for the first radio link between the mobile station and the master base station;
and
a transmitter adapted to transmit the calculated first power headroom report together with information allowing the master base station to determine information on the pathloss of the secondary radio link between the mobile station and the secondary base station, to the master base station,
the processor being further adapted to calculate a secondary power headroom report for the secondary radio link between the mobile station and the secondary base station, and
the transmitter being further adapted to transmit the calculated secondary power headroom report to the secondary base station.

2 more elements

Dependencies are inferred from the claim text.

Power control and power headroom reporting for dual connectivity

Life of this patent

Power control and power headroom reporting for dual connectivity

Life of this patent

Abstract

Claims15