1. A radio communication apparatus that transmits a transmission packet to another radio communication apparatus, comprising:a free resource searcher that searches for free resources in a resource range;
a transmission processor that transmits the transmission packet, using a free resource within the resource range; and
a transmission prohibition timer that sets a transmission prohibition time to prohibit starting a next resource range after transmission of the transmission packet by the resource range,
wherein the free resource searcher searches for free resources in the next resource range after expiration of the transmission prohibition time, and
wherein the free resource searcher searches for free resources in the next resource range even before the transmission prohibition time expires in a case where a type of the transmission packet requires real-time property.