METHOD AND DEVICE FOR TRANSMITTING RANDOM ACCESS AND OTHER UPLINK CHANNELS OF OTHER CELL IN MOBILE COMMUNICATION CELL IN MOBILE COMMUNICATION
First Claim
1. A method for operating a terminal to transmit uplink channels to a base station in a wireless communication system supporting carrier aggregation of at least one carrier, the method comprising:
- determining whether a subframe carrying a random access preamble on a first carrier includes an uplink channel on a second carrier having an uplink timing different from the uplink timing of the first carrier;
determining, when the uplink channel is included, whether a sum of transmit powers required for transmitting a Random Access Preamble and the uplink channel is greater than a maximum terminal output power; and
transmitting, when the sum of the required transmit powers is greater than the maximum terminal output power, the Random Access Preamble with priority.
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Accused Products
Abstract
The present invention relates to a transmission of a random access in a specific cell from a plurality of serving cells in a mobile communication system using a carrier aggregation technology, and a method for efficiently transmitting uplink channels other than the random access in another cell. In particular, the method for a terminal to transmit an uplink channel to a base station comprises the steps of: confirming whether an uplink channel for a second carrier having an uplink timing different from a first carrier is included in a subframe transmitting a Random Access Preamble for the first carrier; if included, confirming whether the sum of the electric power required for the transmission of the random access preamble and the electric power required for the transmission of the uplink channel exceeds the maximum transmission electric power of the terminal; and, if exceeding, transmitting the random access preamble preferentially before the uplink channel. In addition, the terminal for transmitting an uplink channel to a base station comprises: a transmitter/receiver for transmitting/receiving a signal to/from the base station; and a control unit for confirming whether the uplink channel for a second carrier having an uplink timing different from a first carrier is included in a subframe for transmitting a random access preamble for the first carrier, and if included, confirming whether the sum of the electric power required for transmitting the Random Access Preamble and the electric power required for transmitting the uplink channel exceeds the maximum transmission electric power of the terminal, and if exceeding, controlling the transmission so that the random access preamble is preferentially transmitted before the uplink channel.
41 Citations
20 Claims
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1. A method for operating a terminal to transmit uplink channels to a base station in a wireless communication system supporting carrier aggregation of at least one carrier, the method comprising:
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determining whether a subframe carrying a random access preamble on a first carrier includes an uplink channel on a second carrier having an uplink timing different from the uplink timing of the first carrier; determining, when the uplink channel is included, whether a sum of transmit powers required for transmitting a Random Access Preamble and the uplink channel is greater than a maximum terminal output power; and transmitting, when the sum of the required transmit powers is greater than the maximum terminal output power, the Random Access Preamble with priority. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A terminal for transmitting uplink channels to a base station in a wireless communication system supporting carrier aggregation of at least one carrier, the terminal comprising:
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a transceiver configured to transmit and receive signals to and from the base station; and a control unit configured to determine whether a subframe carrying a random access preamble on a first carrier includes an uplink channel on a second carrier having an uplink timing different from the uplink timing of the first carrier;
determine, when the uplink channel is included, whether a sum of transmit powers required for transmitting, the Random Access Preamble and the uplink channel is greater than a maximum terminal output power; and
control transmitting, when the sum of the required transmit powers is greater than the maximum terminal output power, the Random Access Preamble with priority. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A wireless communication system supporting carrier aggregation of at least one carrier, the system comprising:
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a base station; and a terminal configured to determine whether a subframe carrying a random access preamble on a first carrier includes an uplink channel on a second carrier having an uplink timing different from the uplink timing of the first carrier;
determine, when the uplink channel is included, whether a sum of transmit powers required for transmitting the Random Access Preamble and the uplink channel is greater than a maximum terminal output power; and
transmit, when the sum of the required transmit powers is greater than the maximum terminal output power, the Random Access Preamble with priority. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification