Method for a terminal to transmit channel state information to a base station in a radio communication system, and device for same
A method for a terminal to allocate a resource for transmitting uplink control information to a serving base station (BS) in a radio communication system includes when a report of at least one periodic RI and a report of at least one aperiodic RI occur in the same subframe, mapping the at least one periodic RI and the at least one aperiodic RI into a physical uplink shared channel of the subframe and transmitting the mapped at least one periodic RI and at least one aperiodic RI to the serving BS. The at least one aperiodic RI may correspond to at least one component carrier wave in each of the serving BS and an adjacent BS for CoMP transmission of the serving BS and the adjacent BS, and the at least one periodic RI may correspond to at least one component carrier wave for non-CoMP transmission in the serving BS.
1. A method of transmitting a rank indicator (RI) to a serving base station at a user equipment in a wireless communication system, the method comprising:
mapping at least one periodic RI and at least one aperiodic RI to a physical uplink shared channel (PUSCH) of a subframe, if a report on the at least one periodic RI and a report on the at least one aperiodic RI occur in a same subframe; and
transmitting the at least one periodic RI and the at least one aperiodic RI to the serving base station,
wherein the at least one periodic RI and the at least one aperiodic RI are separately time first mapped to resource elements corresponding to a pre-defined symbol of the subframe,
wherein the at least one aperiodic RI corresponds to at least one component carrier configured in each of the serving base station and a neighboring base station for a coordinated multi point (CoMP) transmission of the serving base station and the neighboring base station,
wherein the at least one periodic RI corresponds to at least one component carrier configured in the serving base station for a non-CoMP transmission, and
wherein mapping the at least one periodic RI and the at least one aperiodic RI comprises performing the time first mapping of the at least one periodic RI to the resource elements corresponding to the pre-defined symbol in a descending order of a subcarrier index, after performing the time first mapping of the at least one aperiodic RI to the resource elements corresponding to the pre-defined symbol of the subframe in the descending order of the subcarrier index.
2. The method of claim 1 , wherein mapping the at least one periodic RI and the at least one aperiodic RI comprises:
performing the time first mapping of the at least one aperiodic RI to the resource elements corresponding to the pre-defined symbol of the subframe in a descending order of a subcarrier index;
performing the time first mapping of CQI (channel quality indicator)/PMI (precoding matrix index) information in an ascending order of the subcarrier index; and
performing the time first mapping of the at least one periodic RI followed by the CQI/PMI information in the ascending order of the subcarrier index.
3. The method of claim 1 , wherein mapping the at least one periodic RI and the at least one aperiodic RI comprises mapping each of the at least one aperiodic RI and the at least one periodic RI in an eNode B index order.
4. The method of claim 1 , wherein mapping the at least one periodic RI and the at least one aperiodic RI comprises mapping each of the at least one aperiodic RI and the at least one periodic RI in a component carrier index order.
5. A user equipment device in a wireless communication system, comprising:
a processor configured to map at least one periodic rank indicator (RI) and at least one aperiodic RI to a physical uplink shared channel (PUSCH) of a subframe if a report on the at least one periodic RI and a report on the at least one aperiodic RI occur in a same subframe; and
a transmission module configured to transmit the at least one periodic RI and the at least one aperiodic RI to a serving base station,
wherein the at least one periodic RI and the at least one aperiodic RI are separately time first mapped to resource elements corresponding to a pre-defined symbol of the subframe,
wherein the at least one aperiodic RI corresponds to at least one component carrier configured in each of the serving base station and a neighboring base station for a coordinated multi point (CoMP) transmission of the serving base station and the neighboring base station, and
the at least one periodic RI corresponds to at least one component carrier configured in the serving base station for a non-CoMP transmission, and
wherein the processor is configured to perform the time first mapping of the at least one aperiodic RI to the resource elements corresponding to the pre-defined symbol of the subframe in a descending order of a subcarrier index, and then to perform the time first mapping of the at least one periodic RI to the resource elements corresponding to the pre-defined symbol in the descending order of the subcarrier index.
6. The user equipment device of claim 5 , wherein the processor is configured to perform the time first mapping of the at least one aperiodic RI to the resource elements corresponding to the pre-defined symbol of the subframe in a descending order of a subcarrier index, perform the time first mapping of CQI (channel quality indicator)/PMI (precoding matrix index) information in an ascending order of the subcarrier index, and perform the time first mapping of the at least one periodic RI followed by the CQI/PMI information in the ascending order of the subcarrier index.
7. The user equipment device of claim 5 , wherein the processor is configured to map each of the at least one aperiodic RI and the at least one periodic RI in an eNode B index order.
8. The user equipment device of claim 5 , wherein the processor is configured to map each of the at least one aperiodic RI and the at least one periodic RI in a component carrier index order.