Method and apparatus for performing effective feedback in wireless communication system supporting multiple antennas
First Claim
1. A method for transmitting channel status information (CSI) of downlink (DL) multi-carrier transmission, the method comprising:
- generating the CSI including at least one of a rank indicator (RI), a first precoding matrix index (PMI), a second PMI and a channel quality indicator (CQI) for one or more DL carriers, wherein the CQI is calculated based on precoding information determined by a combination of the first and second PMIs;
determining, when two or more CSIs collide with one another in one uplink (UL) subframe of one UL carrier, a CSI to be transmitted on the basis of priority; and
transmitting the determined CSI over a UL channel,wherein the CSI is classified into a first group including an RI, a second group including a wideband (WB) first PMI, a third group including a WB CQI, and a fourth group including an SB CQI, andwherein the priority is defined that, if a CSI of the first group or a CSI of the second group collides with a CSI of the third group or a CSI of the fourth group, the CSI of the third or fourth group has low priority and is dropped.
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Accused Products
Abstract
A method for transmitting channel status information (CSI) of downlink multi-carrier transmission includes generating the CSI including at least one of a rank indicator (RI), a first precoding matrix index (PMI), a second PMI and a channel quality indicator (CQI) for one or more downlink carriers, the CQI being calculated based on precoding information determined by a combination of the first and second PMIs, determining, when two or more CSIs collide with one another in one uplink subframe of one uplink carrier, a CSI to be transmitted on the basis of priority, and transmitting the determined CSI over a uplink channel. If a CSI including an RI or a wideband first PMI collides with a CSI including a wideband CQI or a subband CQI, the CSI including a wideband CQI or a subband CQI has low priority and is dropped.
365 Citations
16 Claims
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1. A method for transmitting channel status information (CSI) of downlink (DL) multi-carrier transmission, the method comprising:
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generating the CSI including at least one of a rank indicator (RI), a first precoding matrix index (PMI), a second PMI and a channel quality indicator (CQI) for one or more DL carriers, wherein the CQI is calculated based on precoding information determined by a combination of the first and second PMIs; determining, when two or more CSIs collide with one another in one uplink (UL) subframe of one UL carrier, a CSI to be transmitted on the basis of priority; and transmitting the determined CSI over a UL channel, wherein the CSI is classified into a first group including an RI, a second group including a wideband (WB) first PMI, a third group including a WB CQI, and a fourth group including an SB CQI, and wherein the priority is defined that, if a CSI of the first group or a CSI of the second group collides with a CSI of the third group or a CSI of the fourth group, the CSI of the third or fourth group has low priority and is dropped. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A user equipment (UE) for transmitting channel status information (CSI) of downlink multi-carrier transmission comprising:
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a reception module for receiving a downlink signal from an eNode B; a transmission module for transmitting an uplink signal to the eNode B; and a processor for controlling the user equipment (UE) including the reception module and the transmission module, wherein the processor includes; generating the CSI including at least one of a rank indicator (RI), a first precoding matrix index (PMI), a second PMI and a channel quality indicator (CQI) for one or more DL carriers, wherein the CQI is calculated based on precoding information determined by a combination of the first and second PMIs, determining, when two or more CSIs collide with one another in one uplink (UL) subframe of one UL carrier, a CSI to be transmitted on the basis of priority, transmitting, through the transmission module, the determined CSI over a UL channel, wherein the CSI is classified into a first group including an RI, a second group including a wideband (WB) first PMI, a third group including a WB CQI, and a fourth group including an SB CQI, and wherein the priority is defined that, if a CSI of the first group or a CSI of the second group collides with a CSI of the third group or a CSI of the fourth group, the CSI of the third or fourth group has low priority and is dropped. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification