Cognitive radio terminal
First Claim
1. Cognitive telecommunication terminal designed to coexist with a primary telecommunication system using a set of transmission frequency bands (B) comprising a plurality of spatially distributed transmitters, each transmitter being suitable for transmitting within a coverage area in a plurality of frequency bands in said set allocated to the transmitter, said terminal being characterised in that it comprises:
- positioning means suitable for providing the position of said terminal with a predetermined precision;
a database in which the position, allocated frequency bands and coverage information defining the coverage area are stored for each transmitter;
calculation means suitable for determining the maximum power that the terminal can transmit for each frequency band in said set, starting from said terminal position, together with the position, allocated frequency bands and the coverage area for each transmitter, said calculation means also being suitable for sorting frequency bands as a function of the maximum powers thus obtained;
radio transmission/reception means suitable for detecting the presence of a signal in the frequency bands thus sorted, beginning with the frequency band associated with the highest maximum power.
1 Assignment
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Accused Products
Abstract
A cognitive telecommunication terminal designed to coexist with a primary telecommunication system using a set (B) of transmission frequencies comprising a plurality of spatially distributed transmitters, each transmitter being suitable for transmitting within a coverage area in a plurality of frequency bands in said set allocated to the transmitter. The terminal comprises positioning means, a database storing information defining the coverage area for each transmitter, calculation means suitable for determining the maximum power that the terminal can transmit for each frequency band in said set, and for sorting frequency bands as a function of the maximum powers thus obtained. Finally, the terminal comprises radio transmission/reception means suitable for detecting the presence of a signal in the frequency bands thus sorted, beginning with the frequency band associated with the highest maximum power.
39 Citations
19 Claims
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1. Cognitive telecommunication terminal designed to coexist with a primary telecommunication system using a set of transmission frequency bands (B) comprising a plurality of spatially distributed transmitters, each transmitter being suitable for transmitting within a coverage area in a plurality of frequency bands in said set allocated to the transmitter, said terminal being characterised in that it comprises:
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positioning means suitable for providing the position of said terminal with a predetermined precision; a database in which the position, allocated frequency bands and coverage information defining the coverage area are stored for each transmitter; calculation means suitable for determining the maximum power that the terminal can transmit for each frequency band in said set, starting from said terminal position, together with the position, allocated frequency bands and the coverage area for each transmitter, said calculation means also being suitable for sorting frequency bands as a function of the maximum powers thus obtained; radio transmission/reception means suitable for detecting the presence of a signal in the frequency bands thus sorted, beginning with the frequency band associated with the highest maximum power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Method of searching for available band for a terminal required to coexist with a primary telecommunication system using a set (B) of transmission frequencies comprising a plurality of spatially distributed transmitters, each transmitter being suitable for transmitting within a coverage area in a plurality of frequency bands in said set and allocated to the transmitter, said method being characterised in that:
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the position of said terminal is obtained with a predetermined precision; the maximum power that the terminal can transmit for each frequency band in said set is determined, starting from said terminal position, together with the position, allocated frequency bands and coverage area for each transmitter; frequency bands are sorted as a function of the maximum powers thus obtained; the presence of a signal is detected in the frequency bands thus sorted, beginning with the frequency band associated with the highest maximum power. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification