Disclosed is a communication apparatus comprising: a receiver configured to: receive, from a base station, first information and second information, the first information being used for configuring a second physical cell identifier that is different from a first physical cell identifier of a serving cell, the second information being used for configuring a resource for a random access preamble transmission based on information used for indicating the second physical cell identifier, and receive, from the base station, a downlink control information format used for a physical downlink control channel (PDCCH) order for indicating performing of a random access procedure; a controller configured to perform the random access preamble transmission by using the resource based on the second information in a case where the information used for indicating the second physical cell identifier is included in the downlink control information format used for the PDCCH order.