PACKET ROUND TRIP TIME MEASURING METHOD

摘要

When measuring a packet round trip time RTT between a source device (10) and a sync device (20), a band managing unit (28) allocates to a super frame period, a reservation period (CTBt) for transmitting an RTT test command to the sync device (20) from the source device (10) and (CTBr) for transmitting an RTT response setting request command to the source device (10) from the sync device (20). A controller (13) transmits the RTT test command at the start timing of the reservation period (CTBt) so as to start the RTT measurement and terminates the RTT measurement upon reception of the RTT response setting request command.