Method and device in a node used for wireless communication

A second node for wireless communications, comprising:

• a first transmitter, transmitting first information, the first information being used for determining a target carrier;
• a second transmitter, transmitting a first signaling in a first candidate resource set;
• and
• a second transceiver, executing a first signal in a first carrier, and the first signaling being used for determining time-frequency resources occupied by the first signal in the first carrier;
• wherein the executing action is transmitting, or the executing action is receiving;
• the first signaling carries a first identifier, and the first identifier is used for identifying the first carrier;
• the first candidate resource set comprises a positive integer number of candidate resource group(s), and the first signaling occupies a candidate resource group in the first candidate resource set;
• any candidate resource group in the first candidate resource set belongs to a target time-frequency-resource pool, and the target time-frequency-resource pool comprises time-frequency resources other than a candidate resource group comprised in the first candidate resource set;
• frequency-domain resources occupied by the target time-frequency-resource pool belong to the target carrier;
• a target identifier is a non-negative integer, which is used for determining the first candidate resource set out of the target time-frequency-resource pool;
• the target time-frequency-resource pool is one of a first time-frequency-resource pool or a second time-frequency-resource pool;
• whether the target time-frequency-resource pool is the same as the first time-frequency-resource pool is used for determining the target identifier out of a first integer and a second integer;
• the first integer is not equal to the second integer, and the first integer and the second integer are both non-negative integers.

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

• receiving first information, the first information being used for determining a target carrier;
• detecting a first signaling in a first candidate resource set;
• and
• when the first signaling is detected, operating a first signal in a first carrier, and the first signaling being used for determining time-frequency resources occupied by the first signal in the first carrier;
• wherein the operating action is receiving, or, the operating action is transmitting;
• the first signaling carries a first identifier, and the first identifier is used for identifying the first carrier;
• the first candidate resource set comprises a positive integer number of candidate resource group(s), and the first signaling occupies a candidate resource group in the first candidate resource set;
• any candidate resource group in the first candidate resource set belongs to a target time-frequency-resource pool, and the target time-frequency-resource pool comprises time-frequency resources other than a candidate resource group comprised in the first candidate resource set;
• frequency-domain resources occupied by the target time-frequency-resource pool belong to the target carrier;
• a target identifier is a non-negative integer, which is used for determining the first candidate resource set out of the target time-frequency-resource pool;
• the target time-frequency-resource pool is one of a first time-frequency-resource pool or a second time-frequency-resource pool;
• whether the target time-frequency-resource pool is the same as the first time-frequency-resource pool is used for determining the target identifier out of a first integer and a second integer;
• the first integer is not equal to the second integer, and the first integer and the second integer are both non-negative integers.