Method for estimating channel in wireless access system and apparatus for same
First Claim
1. A method of estimating a channel in a wireless access system having a macro cell and a pico cell coexisting therein, the method performed by a user equipment and comprising:
- determining whether or not a CRS (Cell-specific Reference Signal) being inserted in a subframe of the pico cell respective to the MBSFN ABS overlays with a CRS being inserted in a MBSFN ABS of the macro cell, when a MBSFN (Multicast Broadcast Single Frequency Network) ABS (Almost Blank Subframe) is being transmitted from the macro cell;
performing channel estimation by using remaining CRSs excluding the CRS overlaying with the CRS of the macro cell among the CRSs of the pico cell; and
decoding a channel received from a subframe of the pico cell by using the channel estimation value.
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Accused Products
Abstract
Disclosed in the present invention are a method for estimating a channel in a wireless access system in which a macro cell and a pico cell coexist, and an apparatus for same. More specifically, the present invention comprises the steps of: determining whether a cell-specific reference signal (CRS) that is inserted into a subframe of a pico cell, which corresponds to a multicast broadcast signal frequency network (MBSFN) almost blank subframe (ABS), overlaps with a CRS that is inserted into an MBSFN ABS of the macro cell, when the MBSFN ABS is transmitted from the macro cell; estimating the channel by using a CRS from the pico cell that remains after excluding the CRS that overlaps with the CRS of the macro cell; and decoding the channel which is received from the subframe of the pico cell by using a channel estimation value.
6 Citations
12 Claims
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1. A method of estimating a channel in a wireless access system having a macro cell and a pico cell coexisting therein, the method performed by a user equipment and comprising:
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determining whether or not a CRS (Cell-specific Reference Signal) being inserted in a subframe of the pico cell respective to the MBSFN ABS overlays with a CRS being inserted in a MBSFN ABS of the macro cell, when a MBSFN (Multicast Broadcast Single Frequency Network) ABS (Almost Blank Subframe) is being transmitted from the macro cell; performing channel estimation by using remaining CRSs excluding the CRS overlaying with the CRS of the macro cell among the CRSs of the pico cell; and decoding a channel received from a subframe of the pico cell by using the channel estimation value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A user equipment performing channel estimation in a wireless access system having a macro cell and a pico cell coexisting therein, the user equipment comprising:
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a RF (Radio Frequency) unit configured to transmit and receive radio signals; and a processor configured to; determine whether or not a CRS (Cell-specific Reference Signal) being inserted in a subframe of the pico cell respective to a MBSFN ABS overlays with a CRS being inserted in a MBSFN ABS of the macro cell, in case the MBSFN (Multicast Broadcast Single Frequency Network) ABS (Almost Blank Subframe) is being transmitted from the macro cell; perform channel estimation by using remaining CRSs excluding the CRS overlaying with the CRS of the macro cell among the CRSs of the pico cell; and decode a channel received from a subframe of the pico cell by using the channel estimation value. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification