Cell selection and inter-frequency handover
First Claim
1. A method for allocating frequency bands to users on a multiplicity of channels associated with a multi-layer access network across at least two cells communicatively coupled to a first and a second base station, respectively, the method comprising:
- monitoring a radio emission parameter associated with said first and second base stations; and
based on the radio emission parameter of said first and second base stations, selecting a target cell among said at least two cells for a mobile wireless device and transferring said mobile wireless device from a first frequency band to a second frequency band.
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Accused Products
Abstract
The present invention provides a method and an apparatus for controlling a communications system that includes a mobile wireless device, a first and a second base station and a radio network controller. The communications system may allocate frequency bands to users on a multiplicity of channels associated with a multi-layer access network across at least two cells communicatively coupled to a first and a second base station, respectively. The method comprises monitoring a radio emission parameter associated with the first and second base stations that communicate with the mobile wireless device. A radio emission parameter associated with the first and second base stations, such as signal strength or quality, is monitored, to select a target cell among a set of candidate cells for the mobile wireless device and to transfer the mobile wireless device from a first frequency band to a second frequency band. For example, radio resource management algorithms may cause emission-controlled cell selection and inter-frequency handover from a first frequency band to a second frequency band with a transmit power level lower than that of the first frequency band. In accordance with one aspect of the instant application, electromagnetic exposure to a user of the mobile wireless device is substantially decreased, resulting in lower energy costs and reduced environmental impacts.
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Citations
27 Claims
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1. A method for allocating frequency bands to users on a multiplicity of channels associated with a multi-layer access network across at least two cells communicatively coupled to a first and a second base station, respectively, the method comprising:
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monitoring a radio emission parameter associated with said first and second base stations; and
based on the radio emission parameter of said first and second base stations, selecting a target cell among said at least two cells for a mobile wireless device and transferring said mobile wireless device from a first frequency band to a second frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for controlling a communications system including a first and second base station and a radio network controller, the method comprising:
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monitoring a radio emission parameter associated with said first and second base stations;
executing instructions at a mobile wireless device to reduce the emission of radio transmit power from said first and second base stations;
executing instructions at said radio network controller to cause an inter-frequency handover for a user of said mobile wireless device; and
allocating a lower frequency band to said user on a multiplicity of channels associated with a multi-layer access network across at least two cells communicatively coupled to said first and second base stations, respectively. - View Dependent Claims (12, 13, 14, 15)
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16. A communications system comprising:
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a first and a second base station;
a radio network controller coupled to said first and second base stations; and
a storage coupled to said radio network controller, said storage storing instructions to cause an inter-frequency handover for a user of a mobile wireless device that monitors a radio emission parameter associated with said first and second base stations to enable allocation of a lower frequency band to said user on a multiplicity of channels associated with a multi-layer access network across at least two cells communicatively coupled to said first and second base stations, respectively, for reducing the emission of radio transmit power from said first and second base stations. - View Dependent Claims (17)
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18. An article comprising a computer readable storage medium storing instructions that, when executed cause a system to:
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monitor a radio emission parameter associated with a first and a second base station for allocating frequency bands to users on a multiplicity of channels associated with a multi-layer access network across at least two cells communicatively coupled to said first and second base stations, respectively; and
based on the radio emission parameter of said first and second base stations, select a target cell among said at least two cells for a mobile wireless device and transfer said mobile wireless device from a first frequency band to a second frequency band. - View Dependent Claims (19, 20, 21)
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22. An article comprising a computer readable storage medium storing instructions that, when executed cause a system to:
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monitor a radio emission parameter associated with said first and second base stations;
execute instructions at a mobile wireless device to reduce the emission of radio transmit power from said first and second base stations;
execute instructions at said radio network controller to cause an inter-frequency handover for a user of said mobile wireless device; and
allocate a lower frequency band to said user on a multiplicity of channels associated with a multi-layer access network across at least two cells communicatively coupled to said first and second base stations, respectively. - View Dependent Claims (23, 24, 25)
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26. An apparatus for allocating frequency bands to users on a multiplicity of channels associated with a multi-layer access network across at least two cells communicatively coupled to a first and a second base station, respectively, the apparatus comprising:
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means for monitoring a radio emission parameter associated with said first and second base stations; and
means for selecting a target cell among said at least two cells for a mobile wireless device and transferring said mobile wireless device from a first frequency band to a second frequency band based on the radio emission parameter of said first and second base stations.
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27. An apparatus for controlling a communications system including a first and second base station and a radio network controller, the apparatus comprising:
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means for monitoring a radio emission parameter associated with said first and second base stations when transferring said mobile wireless device from said first frequency band to said second frequency band with a transmit power level lower than that of said first frequency band;
means for executing instructions at a mobile wireless device to reduce the emission of radio transmit power from said first and second base stations;
means for executing instructions at said radio network controller to cause an inter-frequency handover for a user of said mobile wireless device; and
means for allocating a lower frequency band to said user on a multiplicity of channels associated with a multi-layer access network across at least two cells communicatively coupled to said first and second base stations, respectively.
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Specification