Wireless communication apparatus, wireless communication system, and wireless communication method

A wireless communication system, comprising:

• a first wireless communication apparatus and a second wireless communication apparatus, wherein
• the first wireless communication apparatus executes
• receiving a plurality of data blocks which are broadcast-transmitted in conformity with a predetermined wireless communication standard by the second wireless communication apparatus,
• receiving, from the second wireless communication apparatus, first notification data as a notification for causing the first wireless communication apparatus to declare that there is an unsuccessfully received data block, the first notification data being broadcast-transmitted after completion of transmission of the plurality of data blocks, and
• transmitting, if the first wireless communication apparatus unsuccessfully receives any of the plurality of data blocks, second notification data indicating the unsuccessfully received data block to the second wireless communication apparatus, in response to the first notification data,
• the second wireless communication apparatus executes
• successively broadcast-transmitting the plurality of data blocks,
• broadcast-transmitting the first notification data after completion of the transmission of the plurality of data blocks, and
• retransmitting, if the second notification data is transmitted as a response to the first notification data from the first wireless communication apparatus, the data block indicated by the second notification data, and
• the second wireless communication apparatus broadcast-transmits a signal giving notice of initiation of the transmission of the plurality of data blocks before initiating the broadcast-transmitting of the plurality of data blocks.

A wireless communication method to be performed by a first wireless communication apparatus and a second wireless communication apparatus, wherein

• the first wireless communication apparatus executes
• receiving a plurality of data blocks which are broadcast-transmitted in conformity with a predetermined wireless communication standard by the second wireless communication apparatus,
• receiving, from the second wireless communication apparatus, first notification data as a notification for causing the first wireless communication apparatus to declare that there is an unsuccessfully received data block, the first notification data being broadcast-transmitted after completion of transmission of the plurality of data blocks, and
• transmitting, if the first wireless communication apparatus unsuccessfully receives any of the plurality of data blocks, second notification data indicating the unsuccessfully received data block to the second wireless communication apparatus, in response to the first notification data,
• the second wireless communication apparatus executes
• successively broadcast-transmitting the plurality of data blocks,
• broadcast-transmitting the first notification data after completion of the transmission of the plurality of data blocks,
• retransmitting, if the second notification data is transmitted as a response to the first notification data from the first wireless communication apparatus, the data block indicated by the second notification data, and
• the second wireless communication apparatus further executes a step of broadcast-transmitting a signal giving notice of initiation of the transmission of the plurality of data blocks before initiating the broadcast-transmitting of the plurality of data blocks.