Method of measuring channel quality in a wireless access system and apparatus for same
First Claim
1. A method of allowing a user equipment to measure channel quality in a wireless access system, the method comprising the steps of:
- measuring channel quality by using each CRS (cell-specific reference signal) transmitted at 0th, 4th, 7th and 11th OFDM (orthogonal frequency division multiplexing) symbols of each subframe;
determining whether a channel quality measurement value at the 0th OFDM symbol is greater as much as a predetermined first threshold value than an average value of channel quality measurement values of the 4th, 7th and 11th OFDM symbols; and
transmitting channel quality information to the base station,wherein the channel quality information is an average value of the channel quality measurement values at 0th, 4th, 7th and 11th OFDM symbols when the channel quality measurement value of the 0th OFDM symbol is not grater greater as much as the first threshold value than the average value of channel quality measurement values of the 4th, 7th and 11th OFDM symbols.
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Abstract
The present invention relates to a method of measuring channel quality in a wireless access system and an apparatus for same. The method of measuring channel quality in a wireless access system includes the steps of: measuring channel quality using each CRS (cell-specific reference signal) transmitted in 0th, 4th, 7th and 11th OFDM (orthogonal frequency division multiplexing) symbols in each subframe from a base station; determining whether a channel quality measurement value of the 0th OFDM symbol is greater by a preset first threshold than an average value of channel quality measurement values of the 4th, 7th and 11th OFDM symbols; and transmitting channel quality information.
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Citations
10 Claims
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1. A method of allowing a user equipment to measure channel quality in a wireless access system, the method comprising the steps of:
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measuring channel quality by using each CRS (cell-specific reference signal) transmitted at 0th, 4th, 7th and 11th OFDM (orthogonal frequency division multiplexing) symbols of each subframe; determining whether a channel quality measurement value at the 0th OFDM symbol is greater as much as a predetermined first threshold value than an average value of channel quality measurement values of the 4th, 7th and 11th OFDM symbols; and transmitting channel quality information to the base station, wherein the channel quality information is an average value of the channel quality measurement values at 0th, 4th, 7th and 11th OFDM symbols when the channel quality measurement value of the 0th OFDM symbol is not grater greater as much as the first threshold value than the average value of channel quality measurement values of the 4th, 7th and 11th OFDM symbols. - View Dependent Claims (2, 3, 4, 5)
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6. A user equipment measuring channel quality in a wireless access system, the user equipment comprising:
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a radio frequency (RF) unit configured to transmit and receive a radio signal; and a processor configured to measure channel quality by using each CRS (cell-specific reference signal) transmitted at 0th, 4th, 7th and 11th OFDM (orthogonal frequency division multiplexing) symbols of each subframe from a base station, determine whether a channel quality measurement value at the Oth OFDM symbol is greater as much as a predetermined first threshold value than an average value of channel quality measurement values of the 4th, 7th and 11th OFDM symbols, and transmit channel quality information to the base station, wherein the channel quality information is an average value of the channel quality measurement values at 0th, 4th, 7th and 11th OFDM symbols when the channel quality measurement value of the 0th OFDM symbol is not greater as much as the first threshold value than the average value of channel quality measurement values of the 4th, 7th and 11th OFDM symbols. - View Dependent Claims (7, 8, 9, 10)
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Specification