Method and apparatus for transmitting feedback information in a wireless communication system containing a relay station
AssigneeLG Electronics Inc.
InventorsJin Young Chun, Su Nam Kim, Jin Sam Kwak, Bin Chul Ihm
Life of this patent
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Abstract
Provided are a method and apparatus for transmitting feedback information in a wireless communication system containing a relay station. A subband is divided by a plurality of partitions, and the relay station measures feedback information for each of the partitions, and transmits feedback information measured for each of the partitions cyclically at a predetermined interval. Each partition can be a physical resource unit (PRU), and one PRU contains 18 subcarriers. Feedback information for each partition can be cyclically transmitted in the order fixed in the subband.
Claims6
A method of transmitting feedback information by a relay station in a wireless communication system employing the relay station, the method comprising:
- receiving a feedback allocation advanced-MAP information element (IE) from a base station;
- measuring the feedback information in a unit of each partition by dividing a subband into a plurality of partitions,
- wherein each partition is one physical resource unit (PRU) including 18 subcarriers;
- and
- transmitting alternately the measured feedback information for each partition according to a specific period,
- wherein a unit of feedback measurement is determined by an ARS_Feedback_Mode field in the feedback allocation A-MAP IE,
- wherein if a value of the ARS_Feedback_Mode field has ‘1’, the measured feedback information is transmitted in the unit of the PRU,
- wherein if a value of the ARS_Feedback_Mode field has ‘0’, the measured feedback information is transmitted in the unit of the subband,
- wherein the value of the ARS_Feedback_Mode field is applied when a value of feedback mode is a specific value that supports a closed loop-single user (CL-SU) in a localized permutation for frequency selective scheduling,
- wherein the feedback information for two PRUs among the feedback information for four PRUs are transmitted together within a specific time period, and
- wherein the feedback information for each partition is cyclically and alternately transmitted in the order of the subband such that the feedback information for a fourth PRU is transmitted after transmission of the feedback information for a second PRU, which was transmitted after the transmission of the feedback information for a third PRU, which was transmitted after the transmission of the feedback information for a first PRU.
An apparatus for transmitting feedback information, the apparatus comprising:
- a processor configured to receive a feedback allocation advanced-MAP information element (IE) from a base station, and to measure the feedback information in a unit of each partition of a plurality of partitions constituting a subband, wherein each partition is one physical resource unit (PRU) including 18 subcarriers;
- and
- a radio frequency (RF) unit coupled to the processor and configured to alternately transmit the measured feedback information for each partition according to a specific period,
- wherein a unit of feedback measurement is determined by an ARS_Feedback_Mode field in the feedback allocation A-MAP IE,
- wherein if a value of the ARS_Feedback_Mode field has ‘1’, the measured feedback information is transmitted in the unit of the PRU,
- wherein if a value of the ARS_Feedback_Mode field has ‘0’, the measured feedback information is transmitted in the unit of the subband,
- wherein the value of the ARS_Feedback_Mode field is applied when a value of feedback mode is a specific value that supports a closed loop-single user (CL-SU) in a localized permutation for frequency selective scheduling,
- wherein the feedback information for two PRUs among the feedback information for the four PRUs are transmitted together within a specific time period, and
- wherein the feedback information for each partition is cyclically and alternately transmitted in the order of the subband such that the feedback information for a fourth PRU is transmitted after transmission of the feedback information for a second PRU, which was transmitted after the transmission of the feedback information for a third PRU, which was transmitted after the transmission of the feedback information for a first PRU.
Dependencies are inferred from the claim text.