Method and device in nodes used for wireless communication

A second node for wireless communications, comprising:

• a first transmitter, transmitting K first-type reference signals, K being a positive integer greater than 1;
• wherein a measurement on a first reference signal is used to determine a first pathloss, the first reference signal being one of the K first-type reference signals;
• a first index is related to a transmission antenna port/transmission antenna ports for a first signal, a target receiver for the first signal is different from the second node;
• a transmit power for the first signal is a first power value, a first reference power value is used to determine the first power value, the first reference power value being linear with the first pathloss;
• the first index is used to determine the first reference signal out of the K first-type reference signals.

A method in a first node for wireless communications, comprising:

• receiving K first-type reference signals, K being a positive integer greater than 1;
• and
• transmitting a first signal;
• wherein a transmit power for the first signal is a first power value, a first reference power value is used to determine the first power value, and the first reference power value is linear with a first pathloss, a measurement on a first reference signal is used to determine the first pathloss, the first reference signal being a first-type reference signal of the K first-type reference signals;
• a first index is related to a transmission antenna port/transmission antenna ports for the first signal, the first index being used to determine the first reference signal out of the K first-type reference signals;
• a transmitter for the K first-type reference signals is different from a target receiver for the first signal.