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US 7,688,926 B2Granted
Frequency overlay communication system and control method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsChang-Ho Suh, Young-Kwon Cho, Dong-Seek Park, Jung-Soo Woo, Sung-Kwon Hong
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Abstract
A frequency overlay communication system that includes a first communication system for performing communication using a first frequency band being a preset bandwidth; and a second communication system for performing communication using a second frequency band being a second preset bandwidth, wherein the second frequency band includes the first frequency band.
Claims21
A transmission apparatus in a frequency overlay communication system using a first frequency band and a second frequency band, the apparatus comprising:
- a preamble channel generator for generating a preamble channel signal;
- a pilot channel generator for generating a pilot channel signal;
- a traffic channel generator for generating a traffic channel signal;
- a control channel generator for generating a control channel signal;
- a scheduler for, upon generation of data to be transmitted, scheduling the data and allocating a frequency band over which the data is to be transmitted according to the second frequency band;
- a multiplexer for generating a downlink channel signal by multiplexing the preamble channel signal, the pilot channel signal, the traffic channel signal, and the control channel signal according to information on the allocated frequency band;
- and
- an inverse fast Fourier transform (IFFT) unit for performing IFFT on the downlink channel signal,
- wherein the second frequency band includes the first frequency band and a third frequency band that is dependent on the second frequency band,
- wherein the preamble channel signal includes a first preamble channel signal transmitted over the first frequency band, and a second preamble channel signal transmitted over the third frequency band,
- wherein the pilot channel signal includes a first pilot channel signal transmitted over the first frequency band, and a second pilot channel signal transmitted over the third frequency band,
- wherein the traffic channel signal includes a first traffic channel signal transmitted over the first frequency band, and a second traffic channel signal transmitted over the third frequency band, and
- wherein the control channel signal includes a first control channel signal transmitted over the first frequency band, and a second control channel signal transmitted over the third frequency band.
10 more elements
A transmission method in a frequency overlay communication system using a first frequency band and a second frequency band, the method comprising:
- generating a preamble channel signal;
- generating a pilot channel signal;
- generating a traffic channel signal;
- generating a control channel signal;
- upon generation of data to be transmitted, scheduling the data and allocating a frequency band over which the data is to be transmitted according to the second frequency band;
- generating a downlink channel signal by multiplexing the preamble channel signal, the pilot channel signal, the traffic channel signal, and the control channel signal according to information on the allocated frequency band;
- and
- performing inverse fast Fourier transform (IFFT) on the downlink channel signal,
- wherein the second frequency band includes the first frequency band and a third frequency band that is dependent on the second frequency band
- wherein the preamble channel signal includes a first preamble channel signal transmitted over the first frequency band, and a second preamble channel signal transmitted over the third frequency band,
- wherein the pilot channel signal includes a first pilot channel signal transmitted over the first frequency band, and a second pilot channel signal transmitted over the third frequency band,
- wherein the traffic channel signal includes a first traffic channel signal transmitted over the first frequency band, and a second traffic channel signal transmitted over the third frequency band, and
- wherein the control channel signal includes a first control channel signal transmitted over the first frequency band, and a second control channel signal transmitted over the third frequency band.
10 more elements
A transmission apparatus in a frequency overlay communication system using a first frequency band and a second frequency band, the apparatus comprising:
- a synchronization channel generator for generating a synchronization channel signal;
- a random access channel generator for generating a random access channel signal;
- a traffic channel generator for generating a traffic channel signal;
- a control channel generator for generating a control channel signal;
- a multiplexer for generating an uplink channel signal by multiplexing the synchronization channel signal, the random access channel signal, the traffic channel signal, and the control channel signal, based on a previous frequency band allocation of the second frequency band;
- and
- an inverse fast Fourier transform (IFFT) unit for performing IFFT on the uplink channel signal,
- wherein the second frequency band includes the first frequency band and a third frequency band that is dependent on the second frequency band,
- wherein the synchronization channel signal includes a first synchronization channel signal transmitted over the first frequency band, and a second synchronization channel signal transmitted over the third frequency band,
- wherein the random access channel signal includes a first random access channel signal transmitted over the first frequency band, and a second random access channel signal transmitted over the third frequency band,
- wherein the traffic channel signal includes a first traffic channel signal transmitted over the first frequency band, and a second Waffle channel signal transmitted over the third frequency band, and
- wherein the control channel signal includes a first control channel signal transmitted over the first frequency band, and a second control channel signal transmitted over the third frequency band.
9 more elements
A transmission method in a frequency overlay communication system using a first frequency band and a second frequency band, the method comprising:
- generating a synchronization channel signal;
- generating a random access channel signal;
- generating a traffic channel signal;
- generating a control channel signal;
- generating an uplink channel signal by multiplexing the synchronization channel signal, the random access channel signal, the traffic channel signal, and the control channel signal, said multiplexing based on a previous allocation of a frequency band of the second frequency band;
- and
- performing inverse fast Fourier transform (IFFT) on the uplink channel signal,
- wherein the second frequency band includes the first frequency band and a third frequency band that is dependent on the second frequency band,
- wherein the synchronization channel signal includes a first synchronization channel signal transmitted over the first frequency band, and a second synchronization channel signal transmitted over the third frequency band,
- wherein the random access channel signal includes a first random access channel signal transmitted over the first frequency band, and a second random access channel signal transmitted over the third frequency band,
- wherein the traffic channel signal includes a first traffic channel signal transmitted over the first frequency band, and a second traffic channel signal transmitted over the third frequency band, and
- wherein the control channel signal includes a first control channel signal transmitted over the first frequency band, and a second control channel signal transmitted over the third frequency band.
9 more elements
Dependencies are inferred from the claim text.