Transmitter, transmission method used by the same, receiver for receiving a radio signal from transmitter and wireless communication system including the same

摘要

A receiver has an ID that includes three signal detection intervals (S1, S2, S3). The three signal detection intervals (S1, S2, S3) are detected as the receiver detects a signal consisting of a value larger than a threshold at each of the detection timings (DT1 to DT4). The transmitter transmits four radio frames (FR1 to FR4) such that each of the radio frames straddles the corresponding one of the detection timings (DT1 to DT4) in the receiver.

主权项

1. A transmitter transmitting a radio frame in accordance with a wireless communication scheme where the transmitter performs carrier sensing and transmits a radio signal when a wireless communication space is available and waits to transmit the radio signal when the wireless communication space is not available, comprising:
a carrier sensing unit that performs carrier sensing in a desired frequency band including a plurality of frequency channels, and a transmitting unit that performs, each time executing carrier sensing, a transmission process where: (1) when the wireless communication space is available as a result of the carrier sensing by the carrier sensing unit, the transmitting unit transmits, in the desired frequency band, one radio frame such that a receiver-side radio apparatus receives a radio frame at a reception timing determined by one or more unit signal detection intervals representing an identifier for the receiver-side radio apparatus, the identifier being defined by using one or more unit signal detection intervals, each of which is a time interval between detection timings of a radio frame, and (2) when the wireless communication space is not available as a result of the carrier sensing, the transmitting unit waits to transmit the one radio frame.