Method and arrangement for spectrum sharing in a radio communication environment
First Claim
1. A method for radio communication in a predetermined radio frequency band between a first transceiver unit and a second transceiver unit, said units being arranged to transmit and receive over a communication frequency band modulated at a carrier frequency, said radio frequency band having a frequency bandwidth which is larger than said communication frequency band, wherein said method comprises the steps of:
- scanning said radio frequency band by either said first and second unit for the detection of the presence of interference prior to the start of the radio communication, andestablishing communication between said first and second unit over any part of said radio frequency band comprising said communication frequency band dependent whether the presence of interference detected at such part being below a level suitable for communication,wherein a plurality of carrier frequency positions are defined within said radio frequency band, the spacing between at least part of adjacent carrier frequency positions being smaller than said communication frequency band, wherein said radio frequency band is scanned at said carrier frequency positions and communication is established by positioning the carrier frequency of said communication frequency band at a carrier frequency position corresponding to part of said radio frequency band available for communication and comprising said communication frequency band.
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Accused Products
Abstract
There is provided a method and an arrangement for flexible coexistence of several radio communication systems on a common radio frequency band. The radio frequency band has a larger bandwidth than the communication frequency band of the several radio communication systems. Prior to the start of a radio communication, the radio frequency band is scanned by a radio transceiver unit of a system for the detection of the presence of interference. The transceiver units are arranged to establish communication over any idle part of the radio frequency band comprising or covering the communication frequency band, thereby avoiding the need for frequency or channel planning. The invention can be used in Personal Communication Systems (PCS) or Cordless Terminal Mobility (CTM) services and Radio in the Local Loop (RLL) applications.
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Citations
19 Claims
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1. A method for radio communication in a predetermined radio frequency band between a first transceiver unit and a second transceiver unit, said units being arranged to transmit and receive over a communication frequency band modulated at a carrier frequency, said radio frequency band having a frequency bandwidth which is larger than said communication frequency band, wherein said method comprises the steps of:
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scanning said radio frequency band by either said first and second unit for the detection of the presence of interference prior to the start of the radio communication, and establishing communication between said first and second unit over any part of said radio frequency band comprising said communication frequency band dependent whether the presence of interference detected at such part being below a level suitable for communication, wherein a plurality of carrier frequency positions are defined within said radio frequency band, the spacing between at least part of adjacent carrier frequency positions being smaller than said communication frequency band, wherein said radio frequency band is scanned at said carrier frequency positions and communication is established by positioning the carrier frequency of said communication frequency band at a carrier frequency position corresponding to part of said radio frequency band available for communication and comprising said communication frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for radio communication in a predetermined radio frequency band between a first transceiver unit and a second transceiver unit. said units being arranged to transmit and receive over a communication frequency band modulated at a carrier frequency, said radio frequency band having a frequency bandwidth which is larger than said communication frequency band, wherein said method comprises the steps of:
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scanning said radio frequency band by either said first and second unit for the detection of the presence of interference prior to the start of the radio communication, and establishing communication between said first and second unit over any part of said radio frequency band comprising said communication frequency band dependent whether the presence of interference detected at such part being below a level suitable for communication, wherein a plurality of interference levels is defined ranging upwards from at least a lower first level of interference to an increased second level of interference respectively, and wherein communication is directly established over part of said radio frequency band if the interference in said part is below said first level of interference, and wherein communication is established over part of said radio frequency band last scanned if the interference in said radio frequency band is above said first level of interference and below a predetermined second level of interference.
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11. An arrangement for radio communication in a predetermined radio frequency band, comprising a first transceiver unit and a second transceiver unit, said units being arranged to transmit and receive over a communication frequency band modulated at a carrier frequency, scanning means in either one of said units for detecting the presence of interference in said radio frequency band prior to establishing communication between said units, and control means for establishing communication between said first and second unit dependent whether the presence of interference detected at such part being below a level suitable for communication, wherein said control means and transceiver units are arranged for establishing communication between said first and second transceiver unit over any part of said radio frequency band comprising said communication frequency band,
wherein said scanning means are arranged for scanning said radio frequency band at a plurality of predetermined frequency positions, the spacing between at least part of adjacent frequency positions being smaller than said communication frequency band , and wherein said control means are arranged for establishing communication by positioning the carrier frequency of said communication frequency band at any frequency position corresponding to part of said radio frequency band available for communication and comprising said communication frequency band.
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19. An arrangement for radio communication in a predetermined radio frequency band, comprising a first transceiver unit and a second transceiver unit, said units being arranged to transmit and receive over a communication frequency band modulated at a carrier frequency, scanning means in either one of said units for detecting the presence of interference in said radio frequency band prior to establishing communication between said units, and control means for establishing communication between said first and second unit dependent whether the presence of interference detected at such part being below a level suitable for communication, wherein said control means and transceiver units are arranged for establishing communication between said first and second transceiver unit over any part of said radio frequency band comprising said communication frequency band,
wherein a plurality of interference levels is defined ranging upwards from at least a low first level of interference to an increased second level of interference respectively, and wherein said control means are arranged for directly establishing communication over part of said radio frequency band if the interference in said part is below said first level of interference, and wherein said control means are arranged for establishing communication over part of said radio frequency band last scanned if the interference in said radio frequency band is above said first level of interference and below said second level of interference.
Specification