BASE STATION, RECEIVING DEVICE, MOBILE TERMINAL, AND FREQUENCY SHARING METHOD
First Claim
1. A base station in a first wireless communication system using a first frequency band that is the same as or adjacent to a second frequency band used by a second wireless communication system, the base station comprising:
- a propagation loss estimation unit configured to estimate propagation loss of a signal in the first frequency band when the signal arrives at a receiving device of the second wireless communication system;
a frequency difference calculation unit configured to calculate a frequency difference between the first frequency band and the second frequency band;
a maximum transmission power determining unit configured to determine maximum transmission power based on the propagation loss estimated by the propagation loss estimation unit and the frequency difference calculated by the frequency difference calculation unit; and
a transmission control unit configured to transmit a signal with transmission power less than or equal to the maximum transmission power determined by the maximum transmission power determining unit.
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Accused Products
Abstract
A disclosed base station is used in a first wireless communication system using a first frequency band that is the same as or adjacent to a second frequency band used by a second wireless communication system, and includes a propagation loss estimation unit configured to estimate propagation loss of a signal in the first frequency band when the signal arrives at a receiving device of the second wireless communication system; a frequency difference calculation unit configured to calculate a frequency difference between the first frequency band and the second frequency band; a maximum transmission power determining unit configured to determine maximum transmission power based on the estimated propagation loss and the calculated frequency difference; and a transmission control unit configured to transmit a signal with transmission power less than or equal to the maximum transmission power determined by the maximum transmission power determining unit.
53 Citations
26 Claims
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1. A base station in a first wireless communication system using a first frequency band that is the same as or adjacent to a second frequency band used by a second wireless communication system, the base station comprising:
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a propagation loss estimation unit configured to estimate propagation loss of a signal in the first frequency band when the signal arrives at a receiving device of the second wireless communication system; a frequency difference calculation unit configured to calculate a frequency difference between the first frequency band and the second frequency band; a maximum transmission power determining unit configured to determine maximum transmission power based on the propagation loss estimated by the propagation loss estimation unit and the frequency difference calculated by the frequency difference calculation unit; and a transmission control unit configured to transmit a signal with transmission power less than or equal to the maximum transmission power determined by the maximum transmission power determining unit. - View Dependent Claims (2, 3, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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4. A base station in a first wireless communication system using a first frequency band that is the same as or adjacent to a second frequency band used by a second wireless communication system, the base station comprising:
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a frequency difference calculation unit configured to calculate a frequency difference between the first frequency band and the second frequency band; a distance calculation unit configured to calculate a distance between the base station and a receiving device of the second wireless communication system; a maximum transmission power determining unit configured to determine maximum transmission power based on the frequency difference calculated by the frequency difference calculation unit and the distance calculated by the distance calculation unit; and a transmission control unit configured to transmit a signal with transmission power less than or equal to the maximum transmission power determined by the maximum transmission power determining unit. - View Dependent Claims (5, 6)
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24. A receiving device in a wireless communication system, comprising:
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a system information storing unit configured to store system information regarding the wireless communication system including the receiving device; and a transmitting unit configured to transmit the system information; wherein the system information includes at least one of an allowable interference level, transmission power used for transmitting the system information, and operating frequency information.
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25. A mobile terminal in a first wireless communication system using a first frequency band that is the same as or adjacent to a second frequency band used by a second wireless communication system, the mobile terminal comprising:
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a frequency difference calculation unit configured to calculate a frequency difference between the first frequency band and the second frequency band; a distance calculation unit configured to calculate a distance between the mobile terminal and a receiving device of the second wireless communication system; a maximum transmission power determining unit configured to determine maximum transmission power based on the frequency difference calculated by the frequency difference calculation unit and the distance calculated by the distance calculation unit; and a transmission control unit configured to transmit a signal with transmission power less than or equal to the maximum transmission power determined by the maximum transmission power determining unit.
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26. A frequency sharing method performed by a base station in a first wireless communication system using a first frequency band that is the same as or adjacent to a second frequency band used by a second wireless communication system, the method comprising:
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a frequency difference calculation step of calculating a frequency difference between the first frequency band and the second frequency band; a distance calculation step of calculating a distance between a mobile terminal of the first wireless communication system and a receiving device of the second wireless communication system; a maximum transmission power determining step of determining maximum transmission power based on the frequency difference calculated in the frequency difference calculation step and the distance calculated in the distance calculation step; and a transmission control step of transmitting a signal with transmission power less than or equal to the maximum transmission power determined in the maximum transmission power determining step.
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Specification