Indoor infrared ad-hoc networking

This paper proposes a method that enables channel assignment distribution to be undertaken for wireless infrared ad hoc networking where the participant transceivers are equipped with directional LEDs. Multiple control handshake code signals are used for channel assignment and reassignment. By employing them at different unique carrier frequencies/channel, transmission with directional emitters reduces the interference between them. Co-channel interference, within one hop between the transceivers, can be hindered since different unique channels are assigned after the channel assignment takes place. This paper also discusses a proposed multiple channel MAC algorithm method based on our transceiver circuit design, and is fully controlled by microcontroller M16/C. By employing a MAC algorithm which enables the status of emitters and photodiodes at the transceiver to be either active or non active, two known popular problems in ad-hoc networking, the exposed and hidden terminal problems, can be fully resolved.