Intelligent transportation systems device
AssigneeCohda Wireless Pty. Ltd.
InventorsPaul Dean Alexander, Paul Kingsley Gray
Life of this patent
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Abstract
An Intelligent Transportation Systems (ITS) device is described. The ITS device (400) includes: radio resources including a receiver (402) adapted to receive a radio signal in at least two frequency bands; a channel detector (410) arranged to analyse a signal received in a first frequency band to determine the presence of a transmission in that frequency band; a controller (402) configured to control assignment of radio resources, and in the event that the channel detector detects a signal in the first frequency band, to prevent transmission of a potentially interfering radio signal. The first frequency channel can be part of another radio communications system, such as a RTTT1 SSRC radio system.
Claims22
An Intelligent Transportation Systems (ITS) device including:
- radio resources including a receiver adapted to receive a radio signal in at least two frequency bands;
- a channel detector arranged to analyse a signal received in a first frequency band to determine the presence of a transmission in that frequency band;
- and
- a controller configured to control assignment of radio resources, and in the event that the channel detector detects a signal in the first frequency band, to prevent transmission of a potentially interfering radio signal,
- wherein the controller is configured to cause the receiver to be tuned to a second frequency band and to decode a plurality of received channels transmitted on the second frequency band, according to a predetermined access scheme applied to transmissions on the second frequency band, and
- wherein in the event that the predetermined access scheme applied to transmission on the second frequency band assigns a first transmission of a first type to a first logical channel, and a second transmission of a second type to a second logical channel, the controller is configured to assign radio resources to the first frequency during at least some periods in which a transmission on the second logical channel of the second frequency band could be received.
A method in a transceiver operating in an Intelligent Transportation System (ITS), the method including:
- enabling reception of a radio transmission in at least one ITS frequency band;
- enabling reception of a radio transmission in at least one first non-ITS frequency band;
- analysing a signal received in the first non-ITS frequency band to detect the presence of a transmission in that frequency band;
- and in the event that a signal in the first non-ITS frequency band is detected;
- and
- preventing transmission of a potentially interfering radio signal, by the transceiver,
- wherein the transmissions received on the ITS frequency band are arranged according a predetermined access scheme applied, such that the ITS frequency band includes a first logical channel and second logical channel, and wherein the method includes:
- enabling reception of a radio transmission in at least one of the first non-ITS frequency band during at least some periods in which a transmission on the second logical channel could be received.
Dependencies are inferred from the claim text.