Apparatus and method for receiving data signals of two adjacent frequency allocations in cellular environments
First Claim
1. A base station apparatus for a wireless communication system with a frequency reuse factor of N, the apparatus comprising:
- a subcarrier mapper for mapping, when there is another base station using an frequency allocation (FA) adjacent to an FA of the base station, control information to subcarriers of predetermined sections such that a mobile station simultaneously receives data signals of the adjacent FAs; and
an inverse fast Fourier transform (IFFT) processor for IFFT-processing data mapped to the subcarriers.
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Accused Products
Abstract
Provided is an apparatus and method for simultaneously receiving data signals of two adjacent frequency allocation (FA) in a cellular environment. When there is another base station using an adjacent FA to an FA of the base station, a subcarrier mapper maps control information to subcarriers of predetermined sections such that a mobile station simultaneously receives data signals of the adjacent FAs. An inverse fast Fourier transform (IFFT) processor IFFT-processes data mapped to the subcarriers. Because two different BSs transmit the same data through independent paths, the mobile station can obtain a macro diversity gain. Also, it is possible to balance the loads of the two BSs.
10 Citations
27 Claims
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1. A base station apparatus for a wireless communication system with a frequency reuse factor of N, the apparatus comprising:
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a subcarrier mapper for mapping, when there is another base station using an frequency allocation (FA) adjacent to an FA of the base station, control information to subcarriers of predetermined sections such that a mobile station simultaneously receives data signals of the adjacent FAs; and
an inverse fast Fourier transform (IFFT) processor for IFFT-processing data mapped to the subcarriers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A mobile station apparatus for simultaneously receiving data signals of two adjacent frequency allocations (FAs) in a wireless communication system that has a frequency reuse factor of N, the apparatus comprising:
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a frequency controller for selecting, when signals are simultaneously received from two base stations using two adjacent FAs, a carrier for simultaneously receiving data signals of the two adjacent FAs;
a local oscillator for generating the carrier selected by the frequency controller; and
a multiplier for multiplying the generated carrier from the local oscillator by a received signal to generate a baseband signal. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method for transmitting data from a base station in a wireless communication system with a frequency reuse factor of N, the method comprising the steps of:
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determining whether there is another base station using a frequency allocation (FA) adjacent to an FA of the base station;
when there is the another base station, creating a frame by locating control information such that a mobile station can simultaneously receive data of the two adjacent FAs; and
transmitting the created frame to the mobile station. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method for receiving data of two adjacent frequency allocations (FAs) at a mobile station in a wireless communication system that has a frequency reuse factor of N, the method comprising the steps of:
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when signals are simultaneously received from two base stations, determining whether FAs of the two base stations are adjacent to each other; and
when the FAs of the two base stations are adjacent to each other, simultaneously communicating with the two base stations by shifting an in-use FA of the mobile station. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification