Method and apparatus for transmitting uplink signal or uplink channel
First Claim
1. A method for transmitting a sounding reference signal (SRS) by a terminal in an environment in which a first carrier corresponding to a first serving cell and a second carrier corresponding to a second serving cell are aggregated, the method comprising:
- receiving first downlink control information (DCI) which is used for downlink scheduling and includes a first transmit power control (TPC) command through the first serving cell;
controlling transmit power of the SRS based on the first TPC command for transmit power control of the SRS; and
transmitting the SRS through the second serving cell using the controlled transmit power,wherein the controlling of the transmit power of the SRS comprises controlling the transmit power of the SRS based on the first TPC command of the first DCI received from at least a fourth downlink sub-frame before a first sub-frame in which the SRS is transmitted among sub-frames.
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Accused Products
Abstract
A method for transmitting a sounding reference signal (SRS) by a terminal in an environment in which a first carrier corresponding to a first serving cell and a second carrier corresponding to a second serving cell are aggregated is provided. The terminal receives first downlink control information (DCI) which is used for downlink scheduling and includes a first transmit power control (TPC) command through the first serving cell. The terminal controls transmit power of the SRS based on the first TPC command for transmit power control of the SRS. Next, the terminal transmits the SRS through the second serving cell using the controlled transmit power.
14 Citations
17 Claims
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1. A method for transmitting a sounding reference signal (SRS) by a terminal in an environment in which a first carrier corresponding to a first serving cell and a second carrier corresponding to a second serving cell are aggregated, the method comprising:
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receiving first downlink control information (DCI) which is used for downlink scheduling and includes a first transmit power control (TPC) command through the first serving cell; controlling transmit power of the SRS based on the first TPC command for transmit power control of the SRS; and transmitting the SRS through the second serving cell using the controlled transmit power, wherein the controlling of the transmit power of the SRS comprises controlling the transmit power of the SRS based on the first TPC command of the first DCI received from at least a fourth downlink sub-frame before a first sub-frame in which the SRS is transmitted among sub-frames. - View Dependent Claims (2, 3, 4)
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5. A method for transmitting a sounding reference signal (SRS) by a terminal in an environment in which a first carrier corresponding to a first serving cell and a second carrier corresponding to a second serving cell are aggregated, the method comprising:
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receiving first downlink control information (DCI) which is used for downlink scheduling and includes a first transmit power control (TPC) command through the first serving cell; controlling transmit power of the SRS based on the first TPC command for transmit power control of the SRS; and transmitting the SRS through the second serving cell using the controlled transmit power, wherein the receiving of the first DCI comprises receiving the first DCI within a first sub-frame group defined for receiving the first DCI, and the controlling of the transmit power of the SRS comprises controlling the transmit power of the SRS based on the first TPC command of the first DCI which is lastly received among the first DCIs received within the first sub-frame group. - View Dependent Claims (6, 7, 8)
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9. A method for transmitting a sounding reference signal (SRS) by a terminal in an environment in which a first carrier corresponding to a first serving cell and a second carrier corresponding to a second serving cell are aggregated, the method comprising:
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receiving first downlink control information (DCI) which is used for downlink scheduling and includes a first transmit power control (TPC) command through the first serving cell; controlling transmit power of the SRS based on the first TPC command for transmit power control of the SRS; transmitting the SRS through the second serving cell using the controlled transmit power; receiving second DCI for uplink TPC, which includes a plurality of second TPC commands and a carrier indicator (CI) indicating a cell to which the second TPC command is applied, through the first serving cell serving as a primary cell for the terminal; determining a third TPC command for the terminal among the plurality of second TPC commands included in the second DCI; and controlling the transmit power of the SRS to be transmitted through the second serving cell based on the third TPC command when the CI included in the second DCI indicates the second serving cell which is a secondary cell for the terminal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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Specification