MOBILE RADIO COMMUNICATION SYSTEM, MOBILE COMMUNICATION DEVICE, AND FREQUENCY CONTROL METHOD THEREOF
First Claim
1. A mobile radio communication system including a mobile station and a stationary base station, whereinthe base station transmits a high-frequency signal to the mobile station, andthe mobile station predicts a frequency change in a reception high-frequency signal received from the base station based on mobile environment information on the mobile station provided from outside and controls a frequency of a local oscillator signal based on a prediction result.
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Accused Products
Abstract
A mobile communication device and a frequency control method for the device are provided that can have an internal reference frequency follow a change in reception frequency even when the reception frequency changes abruptly. In a mobile radio communication system including a mobile station and a stationary base station, the mobile station includes: a transceiver that receives a high-frequency signal from the base station; and an information processing section that predicts a frequency change in the reception high-frequency signal received from the base station based on mobile environment information on the mobile station provided from outside and controls a frequency of a local oscillator signal of the transceiver section based on a prediction result.
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Citations
20 Claims
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1. A mobile radio communication system including a mobile station and a stationary base station, wherein
the base station transmits a high-frequency signal to the mobile station, and the mobile station predicts a frequency change in a reception high-frequency signal received from the base station based on mobile environment information on the mobile station provided from outside and controls a frequency of a local oscillator signal based on a prediction result.
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7. A mobile communication device in a mobile radio communication system including at least one stationary base station, comprising:
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a transceiver for performing radio communication with the base station; and a controller that predicts a frequency change in a reception high-frequency signal received from the base station based on mobile environment information provided from outside and controls a frequency of a local oscillator signal of the transceiver based on a prediction result. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A frequency control method for a mobile communication device performing radio communication with a stationary base station, comprising:
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a) receiving a reception high-frequency signal from the base station by using a local oscillator signal; and b) predicting a frequency change in the reception high-frequency signal received from the base station based on mobile environment information provided from outside; and c) controlling a frequency of the local oscillator signal based on a prediction result. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A program, stored in a non-transitory recording medium, causing a control processor of a mobile communication device in a mobile radio communication system including at least one stationary base station to execute frequency control processing, comprising:
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a) receiving a reception high-frequency signal from the base station by using a local oscillator signal; b) predicting a frequency change in the reception high-frequency signal received from the base station based up mobile environment information provided from outside; and c) controlling a frequency of the local oscillator signal based on a prediction result. - View Dependent Claims (20)
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Specification