Wireless communication apparatus and wireless communication method

A radio communication system in a wireless network system in which a plurality of radio communication apparatuses transmit beacons to each other, the radio communication system comprising a first radio communication apparatus and a second radio communication apparatus, wherein:

• the first radio communication apparatus has:
• an address processor that:
• (i) generates a first unicast address from a first address range, the first unicast address being a temporary address,
• (ii) generates a second unicast address from a second address range, and
• (iii) associates the first unicast address and the second unicast address with a single MAC (Media Access Control) processing unit;
• a first beacon processor that determines whether or not a conflict exists between the second unicast address generated by the address processor and a second unicast address of the second radio communication apparatus;
• and
• a transmitter that, in response to the first beacon processor determining that the conflict exists, switches a value of a source address field of a data frame to be set from the second unicast address generated by the address processor to the first unicast address generated by the address processor and transmits the data frame to the second radio communication apparatus, and
• the second radio communication apparatus has:
• a receiver that receives an address transmitted by the first radio communication apparatus;
• an address determiner that has a first unicast address generated from a third address range, the first unicast address of the second radio communication apparatus being a temporary address, and a second unicast address generated randomly to attempt to be unique, from a fourth address range, the first unicast address of the second radio communication device and the second unicast address of the second radio communication device being associated with a single MAC processing unit, and determines whether or not the address received by the receiver matches either the first unicast address of the second radio communication apparatus or the second unicast address of the second radio communication apparatus;
• and
• a second beacon processor that determines whether or not the second unicast address of the second radio communication apparatus matches the second unicast address of the first radio communication apparatus.

A radio communication method in a wireless network system in which a plurality of radio communication apparatuses transmit beacons to each other, the radio communication method comprising:

• an address generating step of (i) generating a first unicast address from a first address range, the first unicast address being a temporary address, (ii) generating a second unicast address randomly to attempt to be unique, from a second address range, and (iii) associating the first unicast address and the second unicast address with a single MAC (Media Access Control) processing unit;
• a determining step of determining whether or not a conflict exists between the second unicast address generated in the address generating step and a second unicast address of another radio communication apparatus;
• and
• a transmitting step of, in response to the determining step determining that the conflict exists, switching a value of a source address field of a data frame to be set from the second unicast address generated in the address generating step to the first unicast address generated in the address generating step and transmitting the data frame to the another radio communication apparatus in a data period, whereby the data frame includes as the source address the first unicast address generated in the address generating step.