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US 5,818,827 AGranted
Radio communication device and radio communication method
AssigneeSony Corporation
InventorsTakashi Usui, Mitsuhiro Suzuki
Life of this patent
Estimating the term…
Abstract
A radio communication device has a first transmission and reception circuit for transmitting and receiving a channel which is established in a first occupied frequency band according to a first access process, and a second transmission and reception circuit for transmitting and receiving a channel which is established in a second occupied frequency band which is established in a guard band in the first occupied frequency band according to a second access process.
Claims11
A radio communication device, comprising:
- a first transmission and reception circuit for transmitting and receiving using a first channel established in a first occupied frequency band according to a first access process;
- a second transmission and reception circuit for transmitting and receiving using a second channel established in a second occupied frequency band that is established in a guard band of said first occupied frequency band according to a second access process;
- and
- a transmission amplifier having an amplification factor for amplifying a signal to be transmitted, wherein said amplification factor is set to a first value when the radio communication device is used according to said first access process, and said amplification factor is set to a second value smaller than said first value if the radio communication device is used according to said second access process.
1 more element
A radio communication method comprising the steps of:
- transmitting and receiving using a first channel established in a first occupied frequency band according to a first access process using a first transmission power;
- and
- transmitting and receiving using a second channel established in a second occupied frequency band established in a guard band of said first occupied frequency band according to a second access process using a second transmission power, wherein said second transmission power is lower than said first transmission power.
A radio communication device comprising:
- a first transmission and reception circuit for transmitting and receiving using a first channel established in a first occupied frequency band according to a first access process;
- and
- a second transmission and reception circuit for transmitting and receiving using a second channel established in a second occupied frequency band that is established in a guard band of said first occupied frequency band according to a second access process, wherein said radio communication device is a handset unit of a cordless telephone system having a home base station using said second access process, and further comprising means for automatically switching from said second access process to said first access process in response to a system switching control signal received from said home base station.
Dependencies are inferred from the claim text.