Method and apparatus for handover measurement
First Claim
1. A method, comprising:
- processing pilot symbols in a user equipment device in a radio access network, the user equipment device located in a serving cell, the serving cell having a cell-edge section and a cell-center section;
performing handover measurement over a frequency sub-band of an operation bandwidth of the serving cell and one or more different frequency sub-bands of one or more cells adjacent to the serving cell based on the pilot symbols for obtaining a handover measurement result; and
determining whether the user equipment is located in the cell-center section or in the cell-edge section at least partly based on a frequency reuse pattern in the operation bandwidth, wherein the frequency sub-band comprises a cell-edge frequency sub-band and a cell-center frequency sub-band, said method further comprising;
allocating the cell-edge frequency sub-band to the user equipment device for downlink data reception in the user equipment device when the user equipment device is located in the cell-edge section, andallocating the cell-center frequency sub-band to the user equipment device for downlink data reception in the user equipment device when the user equipment device is located in the cell-center section.
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Accused Products
Abstract
A UE performs pilot measurements over a frequency sub-band of serving cell and adjacent cells based on pilot symbols for used in handover. UE uses channel quality measurement result to adjust frequency sub-band and periodicity of pilot measurement. In interference coordination scheme, UE is classified into cell edge or cell center UE based on channel quality measurement result. For downlink data reception, UE in cell edge is allocated cell edge frequency sub-band and UE in cell center is allocated with cell center frequency sub-band. If UE is in cell edge of the serving cell, UE also performs pilot measurement over cell edge frequency sub-band. If UE is in cell center, UE also performs pilot measurement over cell center frequency sub-band of the serving cell. When UE is located in cell edge, it performs measurement at a higher rate than when it is located in cell center.
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Citations
26 Claims
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1. A method, comprising:
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processing pilot symbols in a user equipment device in a radio access network, the user equipment device located in a serving cell, the serving cell having a cell-edge section and a cell-center section; performing handover measurement over a frequency sub-band of an operation bandwidth of the serving cell and one or more different frequency sub-bands of one or more cells adjacent to the serving cell based on the pilot symbols for obtaining a handover measurement result; and determining whether the user equipment is located in the cell-center section or in the cell-edge section at least partly based on a frequency reuse pattern in the operation bandwidth, wherein the frequency sub-band comprises a cell-edge frequency sub-band and a cell-center frequency sub-band, said method further comprising; allocating the cell-edge frequency sub-band to the user equipment device for downlink data reception in the user equipment device when the user equipment device is located in the cell-edge section, and allocating the cell-center frequency sub-band to the user equipment device for downlink data reception in the user equipment device when the user equipment device is located in the cell-center section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 25)
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9. An apparatus, comprising:
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a receiver for receiving pilot symbols in a radio access network, wherein the apparatus is located in a serving cell in the radio access network, wherein the serving cell has a cell-edge section and a cell-center section; and a measurement module configured to perform handover measurement over a frequency sub-band of an operation bandwidth of the serving cell and one or more different frequency sub-bands of one or more cells adjacent to the serving cell based on the pilot symbols for obtaining a handover measurement result, wherein whether the apparatus is located in the cell-edge section or in the cell-center section is determined at least partly based on a frequency reuse pattern in the operation bandwidth, wherein said measurement module is also configured for performing channel quality measurement of the serving cell for providing a channel quality measurement result, said apparatus further comprising; a determining module configured for determining, based on the channel quality measurement result, whether the handover measurement is carried out, and a time interval for the handover measurement. - View Dependent Claims (10, 11, 12, 13, 26)
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14. A method, comprising:
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measuring channel quality of a serving cell in a radio access network for obtaining a channel quality measurement result, wherein the radio access network comprises a serving cell and a plurality of adjacent cells adjacent to the serving cell, and a user equipment device located in the serving cell, the serving cell having a cell-edge section and a cell-center section, and wherein the user equipment device is configured to receive and process pilot symbols; and determining, based on the channel measurement result, whether a handover measurement over a frequency sub-band of an operation bandwidth of the server cell and one or more different frequency sub-bands of one or more cells adjacent to the serving cell based on the pilot symbols is carried out, and a time interval for performing the handover measurement, wherein whether the user equipment is located in the cell-edge section or the cell-center section is determined at least partly based on a frequency reuse pattern in the operation bandwidth. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 24)
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22. A wireless communications network comprising:
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a first network component, and a second network component configured for communication with the first network component, wherein the first network component is located in a first cell adjacent to one or more second cells, each of the first and second cells having a frequency sub-band, and wherein the first network component comprises; means for receiving pilot symbols in a radio access network, wherein the first network component is located in a serving cell of the radio access network, the serving cell having a cell-edge section and a cell-center section, and means for performing handover measurement over the frequency sub-band of an operation bandwidth of the serving cell and one or more cells adjacent to the serving cell based on the pilot symbols, based on the received pilot symbols, and for providing handover measurement result to the second network component; and the second network component is configured to determine whether the first network component is located in the cell-edge section on in the cell-center section at least partly based on a frequency reuse pattern in the operation bandwidth, and to decide whether to carry out a handover event for the first network component at least partly based on the handover measurement results, wherein the frequency sub-band comprises a cell-edge frequency sub-band and a cell-center frequency sub-band, and the cell-edge frequency sub-band is allocated to the user equipment device for downlink data reception in the user equipment device when the user equipment device is located in the cell-edge section, and the cell-center frequency sub-band is allocated to the user equipment device for downlink data reception in the user equipment device when the user equipment device is located in the cell-center section. - View Dependent Claims (23)
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Specification