Radio terminal apparatus and its reception control program
First Claim
1. A radio terminal apparatus in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting a signal containing information that identifies a type of the radio base station, said radio terminal apparatus comprising:
- determination means (18a) for receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining a type of the radio base station based on said information; and
selection means (18b, 18c) for selecting a reception operation mode for receiving a signal from the radio base station in accordance with the determined type of the radio base station.
2 Assignments
0 Petitions
Accused Products
Abstract
A base station transmits information in a downlink signal that identifies whether the base station is an adaptive array base station. If a terminal capable of performing diversity reception determines that a terminal to be connected is an adaptive array base station, it stops to perform diversity reception and set an antenna used for an uplink signal transmission to be used for an immediately following reception among a plurality of antennas (11, 12). Thus, a reception effectively utilizing transmission directivity from the adaptive array base station is attained, and interference wave can be reduced. These process are executed with software by DSP (18).
23 Citations
10 Claims
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1. A radio terminal apparatus in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting a signal containing information that identifies a type of the radio base station, said radio terminal apparatus comprising:
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determination means (18a) for receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining a type of the radio base station based on said information; and
selection means (18b, 18c) for selecting a reception operation mode for receiving a signal from the radio base station in accordance with the determined type of the radio base station.
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2. A radio terminal apparatus capable of performing diversity reception using a plurality of antennas (11, 12) in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting information that identifies whether the radio base station is a radio base station performing an adaptive array operation with directivity, said radio terminal apparatus comprising:
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determination means (18a) for receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining whether the radio base station is a radio base station performing said adaptive array operation based on said information; and
set means (18b) for setting an antenna used for a signal transmission to the radio base station among said plurality of antennas to be used for a signal reception from the radio base station that immediately follows the signal transmission when the radio base station is determined to be a radio base station performing said adaptive array operation, and for setting said plurality of antennas to be used for receiving a signal from the radio base station by diversity reception when the radio base station is determined to be a radio base station not performing said adaptive array operation.
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3. A radio terminal apparatus capable of selectively performing adaptive array reception or diversity reception using a plurality of antennas (11, 12) in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting information that identifies whether the radio base station is a radio base station performing an adaptive array operation with directivity, said radio terminal apparatus comprising:
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determination means (18a) for receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining whether the radio base station is a radio base station performing said adaptive array operation based on said information; and
set means (18c) for setting said plurality of antennas to be used for receiving a signal from the radio base station by adaptive array reception when the radio base station is determined to be a radio base station performing said adaptive array operation, and for setting said plurality of antennas to be used for receiving a signal from the radio base station by diversity reception or adaptive array reception when the radio base station is determined to be a radio base station not performing said adaptive array operation.
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4. A radio terminal apparatus capable of performing diversity reception using a plurality of antennas (11, 12) in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting information that identifies whether the radio base station is a radio base station performing a spatial multiplexing operation with directivity, said radio terminal apparatus comprising:
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determination means (18a) for receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining whether the radio base station is a radio base station performing said spatial multiplexing operation based on said information; and
set means (18b) for setting an antenna used for a signal transmission to the radio base station among said plurality of antennas to be used for a signal reception from the radio base station that immediately follows the signal transmission when the radio base station is determined to be a radio base station performing said spatial multiplexing operation, and for setting said plurality of antennas to be used for receiving a signal from the radio base station by diversity reception when the radio base station is determined to be a radio base station not performing said spatial multiplexing operation.
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5. A radio terminal apparatus capable of selectively performing adaptive array reception or diversity reception using a plurality of antennas (11, 12) in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting information that identifies whether the radio base station is a radio base station performing a spatial multiplexing operation with directivity, said radio terminal apparatus comprising:
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determination means (18a) for receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining whether the radio base station is a radio base station performing said spatial multiplexing operation based on said information; and
set means (18c) for setting said plurality of antennas to be used for receiving a signal from the radio base station by adaptive array reception when the radio base station is determined to be a radio base station performing said spatial multiplexing operation, and for setting said plurality of antennas to be used for receiving a signal from the radio base station by diversity reception or adaptive array reception when the radio base station is determined to be a radio base station not performing said spatial multiplexing operation.
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6. A reception operation control program for controlling a reception operation in a radio terminal apparatus in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting a signal containing information that identifies a type of the radio base station, said reception operation control program being for causing a computer to execute:
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a determination step of receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining a type of the radio base station based on said information; and
a selection step of selecting a reception operation mode for receiving a signal from the radio base station in accordance with the determined type of the radio base station.
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7. A reception operation control program for controlling a reception operation in a radio terminal apparatus capable of performing diversity reception using a plurality of antennas (11, 12) in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting information that identifies whether the radio base station is a radio base station performing an adaptive array operation with directivity, said reception operation control program being for causing a computer to execute:
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a determination step of receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining whether the radio base station is a radio base station performing said adaptive array operation based on said information; and
a set step of setting an antenna used for a signal transmission to the radio base station among said plurality of antennas to be used for a signal reception from the radio base station that immediately follows the signal transmission when the radio base station is determined to be a radio base station performing said adaptive array operation, and for setting said plurality of antennas to be used for receiving a signal from the radio base station by diversity reception when the radio base station is determined to be a radio base station not performing said adaptive array operation.
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8. A reception operation control program for controlling a reception operation in a radio terminal apparatus capable of selectively performing adaptive array reception or diversity reception using a plurality of antennas (11, 12) in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting information that identifies whether the radio base station is a radio base station performing an adaptive array operation with directivity, said reception operation control program being for causing a computer to execute:
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a determination step of receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining whether the radio base station is a radio base station performing said adaptive array operation based on said information; and
a set step of setting said plurality of antennas to be used for receiving a signal from the radio base station by adaptive array reception when the radio base station is determined to be a radio base station performing said adaptive array operation, and for setting said plurality of antennas to be used for receiving a signal from the radio base station by diversity reception or adaptive array reception when the radio base station is determined to be a radio base station not performing said adaptive array operation.
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9. A reception operation control program for controlling a reception operation in a radio terminal apparatus capable of performing diversity reception using a plurality of antennas (11, 12) in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting information that identifies whether the radio base station is a radio base station performing spatial multiplexing operation with directivity, said reception operation control program being for causing a computer to execute:
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a determination step of receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining whether the radio base station is a radio base station performing said spatial multiplexing operation based on said information; and
a set step of setting an antenna used for a signal transmission to the radio base station among said plurality of antennas to be used for a signal reception from the radio base station that immediately follows the signal transmission when the radio base station is determined to be a radio base station performing said spatial multiplexing operation, and for setting said plurality of antennas to be used for receiving a signal from the radio base station by diversity reception when the radio base station is determined to be a radio base station not performing said spatial multiplexing operation.
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10. A reception operation control program for controlling a reception operation in a radio terminal apparatus capable of selectively performing adaptive array reception or diversity reception using a plurality of antennas (11, 12) in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting information that identifies whether the radio base station is a radio base station performing a spatial multiplexing operation with directivity, said reception operation control program being for causing a computer to execute:
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a determination step of receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining whether the radio base station is a radio base station performing said spatial multiplexing operation based on said information; and
a set step of setting said plurality of antennas to be used for receiving a signal from the radio base station by adaptive array reception when the radio base station is determined to be a radio base station performing said spatial multiplexing operation, and for setting said plurality of antennas to be used for receiving a signal from the radio base station by diversity reception or adaptive array reception when the radio base station is determined to be a radio base station not performing said spatial multiplexing operation.
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Specification