Terminal apparatus transmitting signal containing predetermined information

摘要

An RF unit and a modem unit receive a packet signal, containing information regarding a frame construction, which is transmitted from a base station apparatus in a first period of a frame at least including first periods and second periods. An extraction unit identifies the second period in the frame, based on the received packet signal. A setting unit sets a waiting time period in the identified second period. A carrier sensing unit carries out carrier sensing over the waiting time period set by the setting unit. The modem unit and the RF unit broadcast the packet signal based on a result of the carrier sensing.

主权项

1. A terminal apparatus mounted on a vehicle a comprising:
a receiver configured to receive a packet signal, containing information regarding a frame construction, which is transmitted from a base station apparatus in a first period of a frame at least including a first period and a second period; an identifying unit configured to identify the second period in the frame, based on the packet signal received by the receiver; a setting unit configured to set a waiting time period in the second period identified by the identifying unit; a carrier sensing unit configured to perform carrier sensing over the waiting time period set by the setting unit; and a transmitter configured to transmit a packet signal based on a result of the carrier sensing performed by the carrier sensing unit, wherein a range of the waiting time period settable by the setting unit is longer than a range of a waiting time period, for carrier sensing, which is settable by a terminal apparatus carried by a pedestrian capable of transmitting a packet signal in the second period.