A ramp for accessing a truck cab. The UE detects a number of Assignment Advanced-MAP groups and a number of a plurality of A-A-MAP Information Elements included in each of the A-A-MAP groups, extracts type and flag of each of the plurality of A-A-MAP IEs; and performs blind detection of resource assignment information on the basis of the type and flag of each of the A-A-MAP IEs. The at least one protrusion is configured to support one of the light emitting element and the light receiving element in a contact manner in a state that the terminal is electrically connected to the circuit board.