Wireless communication apparatus
First Claim
1. A wireless communications terminal apparatus which receives signals transmitted from a plurality of radio stations and calculates its position, using the received signals, comprising:
- repeater detection means for detecting a signal from a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations from among said received signals; and
position calculation means for calculating the position of the terminal apparatus, wherein, when said repeater detection means has detected a signal from a repeater, said position calculation means ignores the detected signal from the repeater and calculates the position of the terminal apparatus, using the received signals from other radio stations.
6 Assignments
0 Petitions
Accused Products
Abstract
The disclosed invention provides a wireless communications terminal apparatus that calculates its accurate position, eliminating the influence of a repeater on the calculation without using complicated processing. The terminal apparatus receives signals transmitted from a plurality of radio stations and calculates its position, using the received signals. The terminal apparatus comprises repeater detection means for detecting a signal from a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from that radio station from among the received signals and position calculation means for calculating its position. When the repeater detection means has detected a signal from a repeater, the position calculation means ignores the detected signal from the repeater and calculates the terminal position, using the received signals from other radio stations.
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Citations
20 Claims
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1. A wireless communications terminal apparatus which receives signals transmitted from a plurality of radio stations and calculates its position, using the received signals, comprising:
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repeater detection means for detecting a signal from a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations from among said received signals; and
position calculation means for calculating the position of the terminal apparatus, wherein, when said repeater detection means has detected a signal from a repeater, said position calculation means ignores the detected signal from the repeater and calculates the position of the terminal apparatus, using the received signals from other radio stations. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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2. A wireless communications terminal apparatus which receives signals transmitted from a plurality of radio stations and calculates its position, using the received signals, comprising:
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repeater detection means for detecting a signal from a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations from among said received signals; and
position calculation means for calculating the position of the terminal apparatus, wherein, when said repeater detection means has detected a signal from a repeater, said position calculation means determines the location of the repeater transmitting the detected signal as the position of the terminal apparatus.
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9. A system for determining terminal position, comprising:
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radio stations which transmit signals to a wireless communications terminal apparatus;
a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations; and
a wireless communications terminal apparatus which receives signals from a plurality of radio stations for calculating its position, using the received signals, said system further comprising;
repeater detection means for detecting a signal from said repeater from among said received signals; and
position calculation means for calculating the position of the terminal apparatus, wherein, when said repeater detection means has detected a signal from a repeater, said position calculation means ignores the detected signal from the repeater and calculates the position of the terminal apparatus, using the received signals from other radio stations.
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10. A system for determining terminal position, comprising:
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radio stations which transmit signals to a wireless communications terminal apparatus;
a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations; and
a wireless communications terminal apparatus which receives signals from a plurality of radio stations for calculating its position, using the received signals, said system further comprising;
repeater detection means for detecting a signal from said repeater from among said received signals; and
position calculation means for calculating the position of the terminal apparatus, wherein, when said repeater detection means has detected a signal from a repeater, said position calculation means determines the location of the repeater transmitting the detected signal as the position of the terminal apparatus. - View Dependent Claims (11, 12)
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13. A position calculation method by which a wireless communications terminal apparatus receives signals transmitted from a plurality of radio stations and calculates its position, using the received signals, said position calculation method comprising:
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a repeater detection step for detecting a signal from a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations from among said received signals; and
a position calculation step for calculating the position of the terminal apparatus, wherein, when a signal from a repeater has been detected by said repeater detection step, the detected signal from the repeater is ignored and the position of the terminal apparatus is calculated by using the received signals from other radio stations in said position calculation step. - View Dependent Claims (15, 16)
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14. A position calculation method by which a wireless communications terminal apparatus receives signals transmitted from a plurality of radio stations and calculates its position, using the received signals, said position calculation method comprising:
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a repeater detection step for detecting a signal from a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations from among said received signals; and
a position calculation step for calculating the position of the terminal apparatus, wherein, when a signal from a repeater has been detected by said repeater detection step, the location of the repeater transmitting the detected signal is determined as the position of the terminal apparatus in said position calculation step.
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17. A server apparatus which calculates the position of a wireless communications terminal apparatus which received signals from a plurality of radio stations, said server apparatus comprising:
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position calculation means for calculating the position of the terminal apparatus, based on timing when said wireless communications terminal apparatus received the signals; and
repeater detection means for detecting a signal from a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations from among said received signals;
wherein, when said repeater detection means has detected a signal from a repeater, said position calculation means ignores the detected signal from the repeater and calculates the position of the terminal apparatus, using the received signals from other radio stations.
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18. A server apparatus which calculates the position of a wireless communications terminal apparatus which received signals from a plurality of radio stations, said server apparatus comprising:
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position calculation means for calculating the position of the terminal apparatus, based on timing when said wireless communications terminal apparatus received the signals; and
repeater detection means for detecting a signal from a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations from among said received signals;
wherein, when said repeater detection means has detected a signal from a repeater, said position calculation means determines the location of the repeater transmitting the detected signal as the position of the terminal apparatus.
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19. An apparatus fabricated with semiconductor integrated circuits having a memory into which a program can be stored and a CPU,
wherein a computer-executable program is stored into said memory and said CPU executes said program stored and retained in said memory, said program comprising: -
a repeater detection step for detecting a signal from a repeater which transmits signals that are based on signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations from among said received signals; and
a position calculation step for calculating the position of the terminal apparatus, wherein, when a signal from a repeater has been detected by said repeater detection step, the detected signal from the repeater is ignored and the position of the terminal apparatus is calculated by using the received signals from other radio stations in said position calculation step.
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20. An apparatus fabricated with semiconductor integrated circuits having a memory into which a program can be stored and a CPU,
wherein a computer-executable program is stored into said memory and said CPU executes said program stored and retained in said memory, said program comprising: -
a repeater detection step for detecting a signal from a repeater which transmits signals that are generated on the basis of signals transmitted from one of the radio stations and indistinguishable from the signals transmitted from the one of the radio stations from among said received signals; and
a position calculation step for calculating the position of the terminal apparatus, wherein, when a signal from a repeater has been detected by said repeater detection step, the location of the repeater transmitting the detected signal is determined as the position of the terminal apparatus in said position calculation step.
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Specification