Apparatus and method for improving reception performance in a smart antenna system
First Claim
1. An apparatus of a Base Station (BS) in a communication system, comprising:
- a channel state checker for checking a channel state of a Mobile Station (MS) serviced by the BS;
an interference cancellation decider for making a determination whether to cancel interference for the MS according to the channel state of the MS; and
a channel allocator for making a determination whether to allocate a fixed channel to the MS according to the determination of the interference cancellation decider,wherein the channel allocator allocates the fixed channel to the MS when a determination of interference cancelling is made, and does not allocate the fixed channel to the MS when a determination of interference cancelling is not made, and sends channel allocation information to a neighbor BS,wherein the fixed channel is a channel that is allocated for forming a fixed beam for the MS, andwherein the neighbor BS forms a beam taking into account the channel allocation information.
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Accused Products
Abstract
An apparatus and method for improving the reception performance of a Mobile Station (MS) in a multiple antenna system are provided. In an apparatus of a Base Station (BS) in the multiple antenna system, upon receipt of a request for interference cancellation for a first MS serviced by a neighbor BS, a channel estimator estimates a channel from the first MS and a channel from a second MS serviced by the BS. A beam coefficient generator generates a first beam coefficient based on channel estimates of the first and second MSs and a second beam coefficient based on the channel estimate of the second MS. An interference cancellation decider determines whether to perform interference cancellation for the first MS using the first and second beam coefficients.
12 Citations
23 Claims
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1. An apparatus of a Base Station (BS) in a communication system, comprising:
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a channel state checker for checking a channel state of a Mobile Station (MS) serviced by the BS; an interference cancellation decider for making a determination whether to cancel interference for the MS according to the channel state of the MS; and a channel allocator for making a determination whether to allocate a fixed channel to the MS according to the determination of the interference cancellation decider, wherein the channel allocator allocates the fixed channel to the MS when a determination of interference cancelling is made, and does not allocate the fixed channel to the MS when a determination of interference cancelling is not made, and sends channel allocation information to a neighbor BS, wherein the fixed channel is a channel that is allocated for forming a fixed beam for the MS, and wherein the neighbor BS forms a beam taking into account the channel allocation information. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus of a Base Station (BS) in a communication system, comprising:
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a channel estimator for, upon receipt of a request for interference cancellation for a first Mobile Station (MS) serviced by a neighbor BS, estimating a channel from the first MS and a channel from a second MS serviced by the BS; a beam coefficient generator for generating a first beam coefficient based on channel estimates of the first and second MSs and a second beam coefficient based on the channel estimate of the second MS; an interference cancellation decider for determining whether to perform interference cancellation for the first MS using the first and second beam coefficients; and a channel allocator for allocating a fixed channel to the second MS when interference cancellation is performed for the first MS, wherein the fixed channel is a channel that is allocated for forming a fixed beam for the second MS in order to avoid interference to the first MS, and wherein the channel estimator estimates the channel of the second MS using a signal received from the second MS, and estimates the channel of the first MS using channel allocation information of the first MS received from the neighbor BS. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. An operation method of a Base Station (BS) in a communication system, comprising the steps of:
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checking a channel state of a Mobile Station (MS) serviced by the BS; determining whether to cancel interference for the MS according to the channel state of the MS; determining whether to allocate a fixed channel to the MS according to the determination as to whether to cancel interference for the MS; and sending channel allocation information of the MS to a neighbor BS, wherein determining whether to allocate a fixed channel to the MS comprises; determining to allocate the fixed channel to the MS when it is determined to cancel interference for the MS; and determining not to allocate the fixed channel to the MS when it is determined not to cancel interference for the MS, wherein the fixed channel is a channel that is allocated for forming a fixed beam for the MS, and wherein the neighbor BS forms a beam taking into account the channel allocation information. - View Dependent Claims (16, 17, 18)
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19. An operation method of a Base Station (BS) in a communication system, comprising the steps of:
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estimating a channel from a first Mobile Station (MS) serviced by a neighbor BS and a channel from a second MS serviced by the BS, upon receipt of a request for interference cancellation for the first MS; generating a first beam coefficient based on channel estimates of the first and second MSs and a second beam coefficient based on the channel estimate of the second MS; determining whether to perform the interference cancellation for the first MS using the first and second beam coefficients; and performing beamforming using the first beam coefficient when interference cancellation is performed for the first MS, wherein, when interference cancellation is performed for the first MS, allocating a fixed channel to the second MS, wherein the fixed channel is a channel that is allocated for forming a fixed beam for the second MS in order to avoid interference to the first MS, and wherein estimating the channel comprises; estimating the channel of the second MS using a signal received from the second MS; and estimating the channel of the first MS using channel allocation information of the first MS received from the neighbor BS. - View Dependent Claims (20, 21, 22, 23)
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Specification