Method and device in nodes used for wireless communication

A second node for wireless communications, comprising:

• a second transmitter, transmitting a first signaling;
• and
• a second receiver, receiving a first signal;
• wherein the first signaling is used to determine scheduling information for the first signal;
• a transmit power for the first signal is a first power, and a linear value of the first power is equal to a product of a linear value of a second power and a first coefficient, the first coefficient being a non-negative real number;
• the first signaling is used to determine a first reference signal resource and a first matrix;
• the first reference signal resource is used to determine a spatial relation of the first signal;
• the first reference signal resource is a reference signal resource in a first reference signal resource set, the first reference signal resource set is one of S reference signal resource sets, S being a positive integer greater than 1, any of the S reference signal resource sets comprises at least one reference signal resource;
• S matrix sets respectively correspond to the S reference signal resource sets, any of the S matrix sets comprises at least one matrix;
• a first matrix set is a matrix set corresponding to the first reference signal resource set among the S matrix sets, whether the first matrix belongs to the first matrix set is used to determine the first coefficient.

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

• receiving a first signaling;
• and
• transmitting a first signal;
• wherein the first signaling is used to determine scheduling information for the first signal;
• a transmit power for the first signal is a first power, and a linear value of the first power is equal to a product of a linear value of a second power and a first coefficient, the first coefficient being a non-negative real number;
• the first signaling is used to determine a first reference signal resource and a first matrix;
• the first reference signal resource is used to determine a spatial relation of the first signal;
• the first reference signal resource is a reference signal resource in a first reference signal resource set, the first reference signal resource set is one of S reference signal resource sets, S being a positive integer greater than 1, any of the S reference signal resource sets comprises at least one reference signal resource;
• S matrix sets respectively correspond to the S reference signal resource sets, any of the S matrix sets comprises at least one matrix;
• a first matrix set is a matrix set corresponding to the first reference signal resource set among the S matrix sets, whether the first matrix belongs to the first matrix set is used to determine the first coefficient.