OPPORTUNISTIC SPECTRUM ACCESS IN MOBILE COGNITIVE RADIO NETWORKS
First Claim
1. A method of spectrum access for wireless communications by a secondary unlicensed unit in a CRN environment comprising one or more secondary unlicensed units and one or more primary licensed units, wherein the one or more secondary units are mobile units, the method comprising:
- receiving information indicative of a location and movement of the one or more secondary unlicensed units and a channel usage pattern and spatial distribution of the one or more primary licensed units;
providing a guard distance to shield the one or more primary licensed units from interference induced by the one or more secondary unlicensed units, the guard distance specifying a radius of the one or more primary licensed units within which the one or more secondary unlicensed units will not have spectrum access;
calculating channel availability to the one or more secondary unlicensed units according to a two-state Markov model including the guard distance as a constraint and based on the information indicative of the location and movement of the one or more secondary unlicensed units and the channel usage pattern and spatial distribution of the one or more primary licensed units; and
accessing the spectrum in the CRN environment from the one or more secondary unlicensed units based on the calculated channel availability.
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Accused Products
Abstract
A method of spectrum access for wireless communications by a secondary unlicensed unit in a CRN environment comprising one or more secondary unlicensed mobile units and one or more primary licensed units includes receiving information indicative of a location and movement of one or more secondary unlicensed units and a channel usage pattern and spatial distribution of one or more primary licensed units is accessed and a guard distance to shield the one or more primary licensed units from interference is calculated. The channel availability to the one or more secondary unlicensed units is then calculated according to a two-state Markov model including the guard distance as a constraint and based on the information indicative of the location and movement of the one or more secondary unlicensed units and the channel usage pattern and spatial distribution of the one or more primary licensed units.
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Citations
20 Claims
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1. A method of spectrum access for wireless communications by a secondary unlicensed unit in a CRN environment comprising one or more secondary unlicensed units and one or more primary licensed units, wherein the one or more secondary units are mobile units, the method comprising:
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receiving information indicative of a location and movement of the one or more secondary unlicensed units and a channel usage pattern and spatial distribution of the one or more primary licensed units; providing a guard distance to shield the one or more primary licensed units from interference induced by the one or more secondary unlicensed units, the guard distance specifying a radius of the one or more primary licensed units within which the one or more secondary unlicensed units will not have spectrum access; calculating channel availability to the one or more secondary unlicensed units according to a two-state Markov model including the guard distance as a constraint and based on the information indicative of the location and movement of the one or more secondary unlicensed units and the channel usage pattern and spatial distribution of the one or more primary licensed units; and accessing the spectrum in the CRN environment from the one or more secondary unlicensed units based on the calculated channel availability. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A computer-readable medium having thereon computer-executable instructions for providing spectrum access for wireless communications by a secondary unlicensed unit in a CRN environment comprising one or more secondary unlicensed units and one or more primary licensed units, wherein the one or more secondary units are mobile units, the computer-executable instructions comprising:
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instructions for receiving information indicative of a location and movement of the one or more secondary unlicensed units and a channel usage pattern and spatial distribution of the one or more primary licensed units; instructions for providing a guard distance to shield the one or more primary licensed units from interference induced by the one or more secondary unlicensed units, the guard distance specifying a radius of the one or more primary licensed units within which the one or more secondary unlicensed units will not have spectrum access; instructions for calculating channel availability to the one or more secondary unlicensed units according to a two-state Markov model including the guard distance as a constraint and based on the information indicative of the location and movement of the one or more secondary unlicensed units and the channel usage pattern and spatial distribution of the one or more primary licensed units; and instructions for accessing the spectrum in the CRN environment from the one or more secondary unlicensed units based on the calculated channel availability. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A secondary unlicensed unit operable in a system for sharing spectrum access in a CRN between one or more primary licensed units and the secondary unlicensed unit, wherein the secondary unlicensed unit is a mobile unit, the secondary unlicensed unit comprising:
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a processor configured to execute computer-executable instructions; and a memory configured to store computer-executable instructions, including instructions for receiving information indicative of a location and movement of the secondary unlicensed unit and a channel usage pattern and spatial distribution of one or more primary licensed units, providing a guard distance specifying a radius of the one or more primary licensed units within which the secondary unlicensed unit will not have spectrum access, calculating channel availability to the secondary unlicensed unit according to a two-state Markov model including the guard distance as a constraint and based on the information indicative of the location and movement of the secondary unlicensed unit and the channel usage pattern and spatial distribution of the one or more primary licensed units, and accessing the spectrum in the CRN environment from the secondary unlicensed unit based on the calculated channel availability. - View Dependent Claims (18, 19, 20)
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Specification