Processing digital signal
First Claim
1. 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 including a first antenna and a second antenna, each associated with a different transmission pattern, the method comprising:
- determining whether user equipment is located at an overlapping service area of a first radio unit and a second radio unit;
determining whether traffic load of at least one of the first and second radio units is greater than a predetermined reference traffic load; and
controlling the first radio unit to transmit a signal to the user equipment using the first antenna and controlling the second radio unit to transmit the same signal to the user equipment using the second antenna when the user equipment is located in the overlapping service area and when the traffic load of at least one of the first and second radio units is greater than the predetermined reference traffic load,wherein a transmission pattern of the first antenna of the first radio unit is different from a transmission pattern of the second antenna of the second radio unit.
3 Assignments
0 Petitions
Accused Products
Abstract
Described embodiments provide a digital unit for controlling a plurality of radio units to transmit a signal to user equipment. The digital unit may determine whether user equipment is located at an overlapping service area of a first radio unit and a second radio unit and control the first radio unit to transmit a signal to the user equipment using the first antenna and control the second radio unit to transmit the same signal to the user equipment using the second antenna when the user equipment is located in the overlapping service area. A transmission pattern of the first antenna of the first radio unit may be different from a transmission pattern of the second antenna of the second radio unit.
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Citations
17 Claims
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1. 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 including a first antenna and a second antenna, each associated with a different transmission pattern, the method comprising:
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determining whether user equipment is located at an overlapping service area of a first radio unit and a second radio unit; determining whether traffic load of at least one of the first and second radio units is greater than a predetermined reference traffic load; and controlling the first radio unit to transmit a signal to the user equipment using the first antenna and controlling the second radio unit to transmit the same signal to the user equipment using the second antenna when the user equipment is located in the overlapping service area and when the traffic load of at least one of the first and second radio units is greater than the predetermined reference traffic load, wherein a transmission pattern of the first antenna of the first radio unit is different from a transmission pattern of the second antenna of the second radio unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A digital unit 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 including a first antenna and a second antenna each associated with a different transmission pattern, the digital unit comprising:
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a receiving unit configured to receive a signal strength value Sa of uplink signals between user equipment and a first radio unit, to receive a signal strength value Sb of uplink signals between the user equipment and a second radio unit, and to receive information on traffic load of the first radio unit and the second radio unit; a determination unit configured to determine whether the user equipment is located at an overlapping service area of the first radio unit and the second radio unit based on the received signal strength values Sa and Sb of uplink signals and to determine whether at least one of the first and second radio units has comparatively high traffic load based on the received information on the traffic load; and a controlling unit configured to control the first radio unit and the second radio unit to transmit the same signal to the user equipment each using both of the first and second antennas when the user equipment is determined as being located in the overlapping service area and when the first and second radio units are determined as having comparatively low traffic load, wherein a transmission pattern of the first antenna of the first radio unit is different from a transmission pattern of the second antenna of the second radio unit. - View Dependent Claims (12, 13, 14, 15)
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16. A radio unit spatially separated from a digital unit and transmitting and receiving a signal to/from user equipment in response to the digital unit, the radio unit configured to:
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include a first antenna and a second antenna each associated with a different transmission pattern; in response to an instruction of the digital unit, select one of the first antenna and the second antenna and transmit a signal to user equipment using the selected one antenna when the user equipment is located at an overlapping service area of the radio unit and a neighbor radio unit and when the radio unit has a comparatively high traffic load, wherein when the radio unit transmits the signal to the user equipment using the selected one antenna, the neighbor radio unit transmits the same signal to the user equipment using one antenna associated with a transmission pattern different from the selected one antenna of the radio unit, and wherein the radio unit is configured to transmit a signal to the user equipment using both of the first antenna and the second antenna when the user equipment is in the overlapping service area and when the traffic load of the radio unit is comparatively low. - View Dependent Claims (17)
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Specification