Technique for wireless communications using a multi-sector antenna arrangement
First Claim
1. Apparatus for transmitting at least one beam containing information to a selected area, the apparatus comprising:
- an antenna for radiating the at least one beam toward the selected area, a portion of power of the at least one beam being distributed to the selected area; and
a controller for controlling a ratio of the portion of power of the at least one beam to total power of the at least one beam radiated from the antenna, the ratio varying with a measure indicative of uniformness of distribution of the portion of power of the at least one beam over the selected area.
6 Assignments
0 Petitions
Accused Products
Abstract
In a base station for providing wireless cellular service, an antenna arrangement is employed to transmit information to Mobile terminals, e.g., cellular radiotelephones, in a cell. The cell is divided into sectors. The antenna arrangement includes a number of antennas, each of which is used to serve one or more of the sectors. However, transmission of an antenna to a sector corresponding thereto is interfered by transmissions of other antennas to their corresponding sectors. To reduce such inter-sector interference in each sector, each antenna is designed to maximize beam efficiency of the sector, which is defined as a ratio of the power transmitted to the sector by the corresponding antenna to the total power radiated from the antenna.
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Citations
44 Claims
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1. Apparatus for transmitting at least one beam containing information to a selected area, the apparatus comprising:
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an antenna for radiating the at least one beam toward the selected area, a portion of power of the at least one beam being distributed to the selected area; and a controller for controlling a ratio of the portion of power of the at least one beam to total power of the at least one beam radiated from the antenna, the ratio varying with a measure indicative of uniformness of distribution of the portion of power of the at least one beam over the selected area. - View Dependent Claims (2, 3, 4, 5, 6)
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7. Apparatus for transmitting at least one beam containing information to a cell, the cell being divided into a plurality of sectors, the apparatus comprising:
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an antenna for radiating the at least one beam toward a selected sector in the cell, a portion of power of the at least one beam being distributed to the selected sector; and a controller for setting a ratio of the portion of power of the at least one beam to total power of the at least one beam radiated from the antenna, the ratio varying with a measure indicative of uniformness of distribution of the portion of power of the at least one beam over the selected sector. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A system for communicating information with a plurality of communication terminals in an area, the area including a plurality of sections, the system comprising:
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at least one antenna for transmitting a signal containing information to a selected one of the plurality of sections, the signal being receivable by one of the plurality of communication terminals which is in the selected section, power of the transmitted signal being distributed amongst the plurality of sections; and a controller for controlling a proportion of the power of the transmitted signal distributed to the selected section, the proportion being a function of a constraint on uniformness of distribution of the power of the transmitted signal over the selected section. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A communications system comprising:
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means for identifying at least one weight value; and means responsive to the at least one weight value for transmitting a signal representative of information toward a selected area, a portion of power of the signal being distributed to the selected area, the at least one weight value being identified to affect a magnitude of the portion of power of the signal relative to total power of the signal, the magnitude varying with a measure indicative of uniformness of distribution of the portion of power of the signal over the selected area. - View Dependent Claims (22, 23, 24, 25)
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26. A method for transmitting at least one beam containing information to a selected area, the method comprising the steps of:
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radiating the at least one beam toward the selected area, a portion of power of the at least one beam being distributed to the selected area; and controlling a ratio of the portion of power of the at least one beam to total power of the at least one beam radiated from the antenna, the ratio varying with a measure indicative of uniformness of distribution of the portion of power of the at least one beam over the selected area. - View Dependent Claims (27, 28, 29)
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30. A method for transmitting at least one beam containing information to a cell, the cell being divided into a plurality of sectors, the method comprising the steps of:
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radiating the at least one beam toward a selected sector in the cell, a portion of power of the at least one beam being distributed to the selected sector; and setting a ratio of the portion of power of the at least one beam to total power of the at least one beam radiated from the antenna, the ratio varying with a measure indicative of uniformness of distribution of the portion of power of the at least one beam over the selected sector. - View Dependent Claims (31, 32)
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33. A method for use in a system for communicating information with a plurality of communication terminals in an area, the area including a plurality of sections, the method comprising the steps of:
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transmitting a signal containing information to a selected one of the plurality of sections, the signal being receivable by one of the plurality of communication terminals which is in the selected section, power of the transmitted signal being distributed amongst the plurality of sections; and controlling a proportion of the power of the transmitted signal distributed to the selected section, the proportion being a function of a constraint on uniformness of distribution of the power of the transmitted signal over the section. - View Dependent Claims (34, 35, 36, 37, 38, 39)
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40. A communications method comprising the steps of:
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identifying at least one weight value; and in response to the at least one weight value, transmitting a signal representative of information to a selected area, a portion of power of the signal being distributed to the selected area, the at least one weight value being identified to affect a magnitude of the portion of power of the signal relative to total power of the signal, the magnitude varying with a measure indicative of uniformness of distribution of the portion of power of the signal over the selected area. - View Dependent Claims (41, 42, 43, 44)
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Specification