Mobile communication terminal, communication method and program
First Claim
1. A mobile communication terminal for performing reception and transmission using an adaptive array method, the mobile communication terminal being provided with (a) a plurality of antennas, (b) reception means for forming a directivity pattern for receiving a desired reception signal from a base station and receiving the reception signal from the base station using the formed directivity pattern, and (c) transmission means for transmitting at least one of a transmission signal using the directivity pattern formed in reception and an omnidirectional transmission signal, the mobile communication terminal comprising:
- detection means for detecting a reception error in the reception signal; and
transmission control means for controlling the transmission means, wherein when the detection means detects the reception error in the reception signal the transmitted transmission signal is the omnidirectional transmission signal and when the detection means does not detect the reception error, the transmission signal is transmitted in the directivity pattern formed in reception.
2 Assignments
0 Petitions
Accused Products
Abstract
A mobile communication terminal having adaptive array antennas is provided that is capable of transmitting signals to an intended base station without interfering other devices, even when a reception error occurs. The mobile communication terminal basically performs array transmission/reception using weight vectors produced in reception to weight and combine signals received via antennas, and thereby receives a desired signal. In transmission, the mobile communication terminal uses the weight vectors used in reception to weight and combine transmission signals and transmits them. However, when an error detection circuit detects a reception error in the desired signal, a transmission control unit turns off a switch for the antenna and transmits the transmission signals in a non-directional pattern via the antenna, so that the transmission signal reaches the intended base station.
38 Citations
28 Claims
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1. A mobile communication terminal for performing reception and transmission using an adaptive array method, the mobile communication terminal being provided with (a) a plurality of antennas, (b) reception means for forming a directivity pattern for receiving a desired reception signal from a base station and receiving the reception signal from the base station using the formed directivity pattern, and (c) transmission means for transmitting at least one of a transmission signal using the directivity pattern formed in reception and an omnidirectional transmission signal, the mobile communication terminal comprising:
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detection means for detecting a reception error in the reception signal; and transmission control means for controlling the transmission means, wherein when the detection means detects the reception error in the reception signal the transmitted transmission signal is the omnidirectional transmission signal and when the detection means does not detect the reception error, the transmission signal is transmitted in the directivity pattern formed in reception. - View Dependent Claims (2, 3, 4)
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5. A mobile communication method for performing reception and transmission using an adaptive array method, the mobile communication terminal being provided with (a) a plurality of antennas, (b) reception means for forming a directivity pattern for receiving a desired reception signal from a base station and receiving the reception signal from the base station using the formed directivity pattern, and (c) transmission means for transmitting at least one of a transmission signal using the directivity pattern formed in reception and an omnidirectional transmission signal, the mobile communication method comprising:
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detection step for detecting a reception error in the reception signal; and transmission control step for controlling the transmission means, wherein when the detection step detects the reception error in the reception signal the transmitted transmission signal is the omnidirectional transmission signal and when the detection step does not detect the reception error, the transmission signal is transmitted in the directivity pattern formed in reception. - View Dependent Claims (6, 7, 8)
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9. A program to be executed by a computer in a mobile communication terminal for performing reception and transmission using an adaptive array method, the program being stored on a computer-readable recording medium, the mobile communication terminal being provided with (a) a plurality of antennas, (b) reception means for forming a directivity pattern for receiving a desired reception signal from a base station and receiving the reception signal from the base station using the formed directivity pattern, and (c) transmission means for transmitting at least one of a transmission signal using the directivity pattern formed in reception and an omnidirectional transmission signal, the program comprising:
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detection step for detecting a reception error in the reception signal; and transmission control step for controlling the transmission means, wherein when the detection step detects the reception error in the reception signal the transmitted transmission signal is the omnidirectional transmission signal and when the detection step does not detect the reception error, the transmission signal is transmitted in the directivity pattern formed in reception. - View Dependent Claims (10, 11, 12)
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13. A mobile communication terminal for performing reception and transmission using an adaptive array method, the mobile communication terminal being provided with (a) a plurality of antennas, (b) a reception circuit which multiplies a signal received using each of the plurality of antennas by a weight vector, and (c) a transmission circuit which transmits the multiplied signal using each of the plurality of antennas, the reception circuit forming a directivity pattern for receiving a desired reception signal from a base station and receiving the reception signal from the base station using the formed directivity pattern, and the transmission circuit transmitting at least one of a transmission signal using the directivity pattern formed in reception and an omnidirectional transmission signal, the mobile communication terminal comprising:
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detection means for detecting a reception error in the reception signal; and transmission control means for controlling the transmission circuit, wherein when the detection means detects the reception error in the reception signal the transmitted transmission signal is the omnidirectional transmission signal and when the detection means does not detect the reception error the transmission signal is transmitted in the directivity pattern formed in reception. - View Dependent Claims (14, 15, 16)
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17. A communication method used for a mobile communication terminal for performing reception and transmission using an adaptive array method, the mobile communication terminal being provided with (a) a plurality of antennas, (b) a reception circuit which multiplies a signal received using each of the plurality of antennas by a weight vector, and (c) a transmission circuit which transmits the multiplied signal using each of the plurality of antennas, the reception circuit forming a directivity pattern for receiving a desired reception signal from a base station and receiving the reception signal from the base station using the formed directivity pattern, and the transmission circuit transmitting at least one of a transmission signal using the directivity pattern formed in reception and an omnidirectional transmission signal, the mobile communication method comprising:
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detection step for detecting a reception error in the reception signal; and transmission control step for controlling the transmission means, wherein when the detection step detects the reception error in the reception signal the transmitted transmission signal is the omnidirectional transmission signal and when the detection step does not detect the reception error, the transmission signal is transmitted in the directivity pattern formed in reception. - View Dependent Claims (18, 19, 20)
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21. A program to be executed by a computer in a mobile communication terminal for performing reception and transmission using an adaptive array method, the program being stored on a computer-readable recording medium, the mobile communication terminal being provided with (a) a plurality of antennas, (b) a reception circuit which multiplies a signal received using each of the plurality of antennas by a weight vector, and (c) a transmission circuit which transmits the multiplied signal using each of the plurality of antennas, the reception circuit forming a directivity pattern for receiving a desired reception signal from a base station and receiving the reception signal from the base station using the formed directivity pattern, and the transmission circuit transmitting at least one of a transmission signal using the directivity pattern formed in reception and an omnidirectional transmission signal, the program comprising:
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detection step for detecting a reception error in the reception signal; and transmission control step for controlling the transmission means, wherein when the detection step detects the reception error in the reception signal the transmitted transmission signal is the omnidirectional transmission signal and when the detection step does not detect the reception error, the transmission signal is transmitted in the directivity pattern formed in reception. - View Dependent Claims (22, 23, 24)
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25. A method for ensuring a signal is transmitted to a proper destination, comprising the steps of:
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receiving, from a base station, a first signal at a mobile communication device, the first signal comprising a first directivity pattern; determining, by the mobile communication device, wherein the first signal includes a reception error; and transmitting, by the mobile communication device, one of a second signal to the base station when the first signal does not include the reception error, the second signal comprising a second directivity pattern corresponding to the first directivity pattern, and a third signal comprising an omnidirectional pattern when the first signal includes the reception error. - View Dependent Claims (26, 27, 28)
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Specification