RELAY STATION IN MOBILE COMMUNICATION SYSTEM, MOBILE STATION, AND RELAY TRANSMISSION METHOD
3 Assignments
0 Petitions
Accused Products
Abstract
Provided is a mobile communication system capable of eliminating the use of a control channel for transmitting specific area information and suppressing the overhead caused by a frequency change process for a mobile station to receive the specific area information. In the mobile communication system, a relay station (20) has a coverage area (21) (specific area) and relays and transmits, in the coverage area (21), a signal received from a base station (10) to a mobile station (30). The relay station (20) adds, to the signal received from the base station (10), the offset of any of a frequency offset, a time offset, and a power offset depending on a risk indicated by risk information in the coverage area (21) (specific area) and transmits the signal after the addition of the offset to the mobile station (30) located in the coverage area (21).
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Citations
10 Claims
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1-5. -5. (canceled)
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6. A relay station comprising:
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a receiving section that receives a signal from a base station covering a first coverage area; an addition section that adds to the signal one of a frequency offset, a time offset and a power offset, in accordance with a level shown by specific area information in a second coverage area, partly or entirely included in the first coverage area; and a transmitting section that transmits, in the second coverage area, the offset-added signal to a mobile station. - View Dependent Claims (7)
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8. A mobile station comprising:
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a receiving section that receives, in a first coverage area, a signal transmitted by a base station covering the first coverage area, and that receives a signal relayed by a relay station in a second coverage area, partly or entirely included in the first coverage area; and a detection section that, when one of a frequency offset, a time offset and a power offset is added to the received signal, detects a level shown by specific area information in the second coverage area, based on the offset.
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9. A relay transmission method comprising:
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adding to a signal received from a base station covering a first coverage area, one of a frequency offset, a time offset and a power offset, in accordance with a level shown by specific area information in a second coverage area, partly or entirely included in the first coverage area; and transmitting, in the second coverage area, the offset-added signal to a mobile station.
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10. A specific area reception method comprising:
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receiving, in a first coverage area, a signal transmitted by a base station covering the first coverage area, and receiving a signal relayed by a relay station in a second coverage area, partly or entirely included in the first coverage area; and when one of a frequency offset, a time offset and a power offset is added to the received signal, detecting a level shown by specific area information in the second coverage area, based on the offset.
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Specification