Controlling radio units to transmitting signal with different transmission power
First Claim
1. A method of controlling radio units to transmit a signal to user equipment wherein each one of the radio units includes at least two antennas associated with a different transmission pattern, the method comprising:
- determining whether user equipment is located at an overlapping cell area of a first cell and a second cell; and
when the user equipment is determined as being located in the overlapping cell area, controlling a first radio unit in the first cell to transmit a signal to the user equipment using a first resource block and simultaneously controlling a second radio unit in the second cell to transmit a reference signal associated with the first resource block,wherein the first radio unit is controlled to use a first transmission power to transmit the signal, the second radio unit is controlled to use a second transmission power to transmit the reference signal, and the second transmission power is lower than the first transmission power, andwherein the method further comprises controlling the second radio unit to transmit a reference signal associated with other resource blocks with a third transmission power, wherein the third transmission power is higher than at least one of the second transmission power and the first transmission power.
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Accused Products
Abstract
Described embodiments provide a method for controlling radio units to transmit a signal to user equipment wherein each one of the radio units includes at least two antennas associated with a different transmission pattern. The method may include determining whether user equipment is located at an overlapping cell area of a first cell and a second cell and controlling a first radio unit in the first cell to transmit a signal to the user equipment using a first resource block and controlling a second radio unit in the second cell to transmit a reference signal associated with the first resource block with a second transmission power when the user equipment is determined as being located in the overlapping cell area. The second transmission power may be lower than a first transmission power of the first radio unit in the first cell for transmitting a reference signal using the first resource block.
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Citations
18 Claims
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1. A method of controlling radio units to transmit a signal to user equipment wherein each one of the radio units includes at least two antennas associated with a different transmission pattern, the method comprising:
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determining whether user equipment is located at an overlapping cell area of a first cell and a second cell; and when the user equipment is determined as being located in the overlapping cell area, controlling a first radio unit in the first cell to transmit a signal to the user equipment using a first resource block and simultaneously controlling a second radio unit in the second cell to transmit a reference signal associated with the first resource block, wherein the first radio unit is controlled to use a first transmission power to transmit the signal, the second radio unit is controlled to use a second transmission power to transmit the reference signal, and the second transmission power is lower than the first transmission power, and wherein the method further comprises controlling the second radio unit to transmit a reference signal associated with other resource blocks with a third transmission power, wherein the third transmission power is higher than at least one of the second transmission power and the first transmission power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus for controlling a plurality of radio units to transmit a signal to user equipment, where each of the plurality of radio units includes at least two antennas each associated with a different transmission pattern, the apparatus comprising:
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at least one memory configured to store information for controlling the plurality of radio units; a communication circuit configured to receive a signal strength value Sa of uplink signals between user equipment and a first radio unit in a first cell and to receive a signal strength value Sb of uplink signals between the user equipment and a second radio unit in a second cell; and at least one processor configured to perform operations for controlling the plurality of radio units, wherein the at least one processor includes a determination unit configured to determine whether the user equipment is located at an overlapping cell area of the first cell and the second cell based on the received signal strength values Sa and Sb of uplink signals; and a controlling unit configured to, when the user equipment is determined as being located in the overlapping cell area, control the first radio unit in the first cell to transmit a signal to the user equipment using a first resource block and to simultaneously control the second radio unit in the second cell to transmit a reference signal associated with the first resource block with a second transmission power, and wherein the first radio unit is controlled to use a first transmission power to transmit the signal, the second radio unit is controlled to use a second transmission power to transmit the reference signal, and the second transmission power is lower than a first transmission power of the first radio unit in the first cell for transmitting a reference signal using the first resource block. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A radio unit included in a first cell, the radio unit configured to:
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include at least two antennas each associated with a different transmission pattern; and transmit a reference signal associated with a first resource block with a first transmission power to user equipment located in an overlapping area of the first cell and a second cell when a second radio unit in the second cell transmit signals to the user equipment using the first resource block, wherein the radio unit is controlled to use the first transmission power to transmit the reference signal to the user equipment, the second radio unit is controlled to use a second transmission power to transmit the signals to the user equipment, and the first transmission power is lower than the second transmission power, and wherein the radio unit is configured to transmit a reference signal associated with other resource blocks with a third transmission power, wherein the third transmission power is higher than at least one of the first transmission power and the second transmission power. - View Dependent Claims (17, 18)
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Specification