Assistance information indication for rat and interface selection for new radio vehicle-to-everything (v2x)

A user equipment (UE), comprising:

• a memory that stores instructions;
• a processor, coupled to the memory, wherein upon execution of the instructions is configured to:
• determine, by a vehicle-to-everything (V2X) layer operating on the processor, whether one or more interfaces are available for signaling based on availability information obtained from a lower layer entity;
• select an interface that is available for signaling based on the availability information obtained from the lower layer entity;
• and
• instruct the lower layer entity or another lower layer entity to use the determined available interface for signaling,
• wherein the V2X layer is configured to provide V2X communications for the UE.

A non-transitory computer-readable storage medium that stores instructions that, when executed by one or more processors of a user equipment (UE), causes the UE to perform operations, the operations comprising:

• determining, by an upper layer entity, whether one or more interfaces are available for signaling based on availability information obtained from a lower layer entity;
• selecting an available interface based on the determining;
• and
• instructing, by the upper layer entity, the lower layer entity or another lower layer entity to use the selected available interface for signaling,
• wherein the upper layer entity is a vehicle-to-everything (V2X) layer or a vehicle-to-vehicle layer (V2V) operating on the UE.