RADIO COMMUNICATION SYSTEM, PARENT RADIO DEVICE AND CHILD RADIO DEVICE

摘要

In a radio communication system, a parent device and a child device perform piggyback-type communication during a time period (T1), and perform broadcasting-type communication or other communication during a time period (T2). When the parent device has a child device (child device n) for which communication data cannot be recognized during the time period (T1), a data communication request is sent to said child device (n) during the time period (T2), said data communication request being for the purpose of requesting data communication to the parent device during a time period (T3).