Flexible resource configuration for NR V2X unicast

A wireless device in a wireless communication system, the wireless device comprising:

• at least one transceiver;
• at least one processor;
• and
• at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
• establishing a radio resource control (RRC) connection with a network;
• receiving, from the network, a configuration for a network scheduled sidelink resource allocation;
• transmitting, to the network, sidelink user equipment (UE) information;
• receiving, from the network, information for a first resource pool, from a first plurality of resource pools, for a first transmission mode and at least one a second resource pool, from a second plurality of resource pools, for a second transmission mode;
• performing, to the network, sidelink buffer status reporting (BSR);
• receiving, from the network, downlink control information (DCI) including a sidelink grant;
• receiving, from the network, information for monitoring a channel busy ratio (CBR) threshold and an entering CBR threshold;
• performing a sidelink transmission in the first transmission mode using a third resource pool among the first plurality of resource pools;
• measuring a CBR of the third resource pool;
• monitoring the plurality of second resource pools based on the CBR of the third resource pool being higher than the monitoring CBR threshold;
• and
• performing sidelink transmission in the first transmission mode using the third resource pool and a fourth resource pool among the plurality of second resource pools based on the entering CBR threshold and at least one of the CBR of the third resource pool or a CBR of the fourth resource pool.

A processing apparatus configured to operate a wireless device in a wireless communication system, wherein the processing apparatus comprises:

• a processor configured to perform operations comprising:
• establishing a radio resource control (RRC) connection with a network;
• receiving, from the network, a configuration for a network scheduled sidelink resource allocation;
• transmitting, to the network, sidelink user equipment (UE) information;
• receiving, from the network, information for a first resource pool, from a plurality of first resource pools, for a first transmission mode and a second resource pool, from a plurality of second resource pools, for a second transmission mode;
• performing, to the network, sidelink buffer status reporting (BSR);
• receiving, from the network, downlink control information (DCI) including a sidelink grant;
• receiving, from the network, information for a monitoring channel busy ratio (CBR) threshold and an entering CBR threshold;
• performing a sidelink transmission in the first transmission mode using a third resource pool among the plurality of first resource pools;
• measuring a CBR of the third resource pool;
• monitoring the plurality of second resource pools based on the CBR of the third resource pool being higher than the monitoring CBR threshold;
• and
• performing a sidelink transmission in the first transmission mode using the third resource pool and a fourth resource pool among the plurality of second resource pools based on the entering CBR threshold and at least one of the CBR of the third resource pool or a CBR of the fourth resource pool.