Method and apparatus for power control

A method implemented at a first wireless device, the method comprising:

• receiving multi-user multiple input multiple output (MU-MIMO) transmissions including receiving message or data over a first beam for the first wireless device from a network node;
• wherein an output power of the first beam for the first wireless device is controlled based on a value of power back-off for the first wireless device,
• wherein the value of power back-off for the first wireless device of a plurality of wireless devices, wherein the plurality of wireless devices are co-scheduled by the network node for MU-MIMO transmissions using two or more beams wherein the first beam of the two or more beams is for the first wireless device, the value of power back-off is determined based on at least one of:
• a number of the plurality of wireless devices including the first wireless device, and
• an estimated increase max power owing to overlap of the two or more beams in an overlap areas, wherein the estimated increase in max power increase in the overlap area is determined by simulation or testing.

A network node, comprising:

• a processor;
• and
• a memory, the memory containing instructions executable by the processor, whereby the network node is operative to:
• determine a value of power back-off for a first wireless device of a plurality of wireless devices, wherein the plurality of wireless devices are co-scheduled by the network node for multi-user multiple input multiple output (MU-MIMO) transmissions using two or more beams wherein a first beam of the two or more beams is for the first wireless device, the value of power back-off being determined based on at least one of:
• a number of the plurality of wireless devices including the first wireless device, and
• an estimated increase max power owing to overlap of the two or more beams in an overlap area, wherein the estimated increase in max power increase in the overlap area is determined by simulation or testing;
• and
• transmit the MU-MIMO transmissions including transmitting a message or data over the first beam for the first wireless device, wherein an output power of the first beam for the first wireless device is controlled based on the value of power back-off for the first wireless device.