Controlling signal transmission in radio units
First Claim
1. A method for controlling signal transmission in a plurality of radio units coupled to a digital unit where the digital unit is located in centralized location and is spatially separated from the plurality of radio units, and each one of radio units is located at a corresponding service call area with an antenna and each forms an independent cell different from cells formed by neighbor radio units, the method comprising:
- receiving, by the digital unit, from multiple radio units, signal quality measurements of a user equipment located within an overlapping service area among cells of the multiple radio units;
determining, by the digital unit, whether to simultaneously use at least two of the multiple radio units located in different cells to transmit a data signal to the user equipment based on the received signal quality measurements; and
controlling, by the digital unit, at least two of the multiple radio units in different cells to transmit a same data signal to the user equipment using a same channel based on the determination result,wherein the controlling includes allocating one of a same symbol and a same subcarrier to the at least two of multiple radio units to transmit the same data signal when orthogonal frequency division multiplexing (OFDM) is employed.
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Accused Products
Abstract
Described embodiments provide controlling signal transmission in a plurality of radio units. The plurality of radio units may be coupled to a digital unit. The digital unit may be spatially separated from the plurality of radio units. Signal quality measurements may be received from multiple radio units when a user equipment is located within an overlapping service area of the multiple radio units. Determination may be made as to whether to simultaneously use at least two of the multiple radio units to transmit a data signal to the user equipment based on the received signal quality measurements. At least two of the multiple radio units may be controlled to transmit a same data signal to the user equipment using a same channel based on the determination result.
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Citations
19 Claims
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1. A method for controlling signal transmission in a plurality of radio units coupled to a digital unit where the digital unit is located in centralized location and is spatially separated from the plurality of radio units, and each one of radio units is located at a corresponding service call area with an antenna and each forms an independent cell different from cells formed by neighbor radio units, the method comprising:
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receiving, by the digital unit, from multiple radio units, signal quality measurements of a user equipment located within an overlapping service area among cells of the multiple radio units; determining, by the digital unit, whether to simultaneously use at least two of the multiple radio units located in different cells to transmit a data signal to the user equipment based on the received signal quality measurements; and controlling, by the digital unit, at least two of the multiple radio units in different cells to transmit a same data signal to the user equipment using a same channel based on the determination result, wherein the controlling includes allocating one of a same symbol and a same subcarrier to the at least two of multiple radio units to transmit the same data signal when orthogonal frequency division multiplexing (OFDM) is employed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A digital unit for controlling signal transmission in a plurality of radio units, wherein each one of the plurality of radio units is located in a cell different from a cell of the digital unit, is coupled to the digital unit through a communication network, located at a corresponding service cell area with an antenna, an independent cell from cells of neighbor radio units, and spatially separated from the digital unit, the digital unit comprising:
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a receiver configured to receive signal quality measurements from multiple radio units when user equipment is located within an overlapping service area of the multiple radio units; a determination unit configured to determine whether to simultaneously use at least two of the multiple radio units located in different cells to transmit a data signal to the user equipment based on the received signal quality measurements; and a controlling unit configured to control at least two of the multiple radio units located in different cells to transmit a same data signal to the user equipment using a same channel based on the determination result, wherein the controlling unit is configured to allocate one of a same symbol and a same subcarrier to the at least two of multiple radio units to transmit the same data signal when orthogonal frequency division multiplexing (OFDM) is employed. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A base station system comprising:
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a plurality of radio units, each radio unit configured to measure a signal intensity value of a signal received from user equipment located within an overlapping service area of the plurality of radio units; and a digital unit configured to receive the signal intensity values from the plurality of radio units and to determine whether to simultaneously use at least two of the plurality of radio units in different cells to transmit a data signal to the user equipment using a same channel, wherein the digital unit is located in a cell spatially separated from the plurality of radio units each forms an independent cell and is located at the formed independent cell for providing a service to a corresponding service call area and each having an independent service area from neighbor radio units, and wherein the digital unit is configured to allocate one of a same symbol and a same subcarrier to the at least two of multiple radio units to transmit the same data signal when orthogonal frequency division multiplexing (OFDM) is employed. - View Dependent Claims (18, 19)
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Specification