Method and device for carrier activation in carrier aggregation system
First Claim
1. A method for establishing time alignment by a terminal in a wireless communication system supporting carrier aggregation, the method comprising:
- receiving, from a base station, medium access control (MAC) control information for activating a secondary cell (SCell);
activating the SCell based on the MAC control information;
determining whether a timer associated with a timing advance group to which the SCell belongs is running, the timer being used to control the timing advance group to be uplink time aligned;
transmitting a random access preamble on the SCell if the timer is not running; and
receiving a random access response message including timing advance information.
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Accused Products
Abstract
The present invention relates to a method and a device for cell activation in a carrier aggregation system, and the method for activating a cell of a terminal according to one embodiment of the present invention comprises: a step for receiving an activation message of a first cell; a step for activating the first cell when the message of the first cell is received; an information obtaining step for obtaining uplink activation information of the first cell; and a transmission determination step for determining whether to execute an uplink transmission according to the uplink activation information. According to an embodiment of the present invention, efficient carrier management plan can be provided.
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Citations
14 Claims
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1. A method for establishing time alignment by a terminal in a wireless communication system supporting carrier aggregation, the method comprising:
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receiving, from a base station, medium access control (MAC) control information for activating a secondary cell (SCell); activating the SCell based on the MAC control information; determining whether a timer associated with a timing advance group to which the SCell belongs is running, the timer being used to control the timing advance group to be uplink time aligned; transmitting a random access preamble on the SCell if the timer is not running; and receiving a random access response message including timing advance information. - View Dependent Claims (2, 3, 4, 5)
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6. A terminal in a wireless communication system supporting carrier aggregation, the terminal comprising:
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a transceiver configured to receive and transmit a signal; and a controller coupled with the transceiver and configured to; receive, from a base station, medium access control (MAC) control information for activating a secondary cell (SCell), activate the SCell based on the MAC control information, determine whether a timer associated with a timing advance group to which the SCell belongs is running, the timer being used to control the timing advance group to be uplink time aligned, transmit a random access preamble on the SCell if the timer is not running, and receive a random access response message including timing advance information. - View Dependent Claims (7, 8, 9, 10)
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11. A method for establishing time alignment by a base station in a wireless communication system supporting carrier aggregation, the method comprising:
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transmitting, to a terminal, medium access control (MAC) control information for activating a secondary cell (SCell); determining whether to receive, from the terminal, a random access preamble on the SCell according to an operation of a timer associated with a timing advance group to which the SCell belongs, the timer being used to control the timing advance group to be uplink time aligned; receiving the random access preamble on the SCell if the timer is not running; and transmitting a random access response message including timing advance information. - View Dependent Claims (12)
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13. A base station in a wireless communication system supporting carrier aggregation, the base station comprising:
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a transceiver configured to transmit and receive a signal; and a controller coupled with the transceiver and configured to; transmit, to a terminal, medium access control (MAC) control information for activating a secondary cell (SCell), determine whether to receive, from the terminal, a random access preamble on the SCell according to an operation of a timer associated with a timing advance group to which the SCell belongs, the timer being used to control the timing advance group to be uplink time aligned, receive the random access preamble on the SCell if the timer is not running, and transmit a random access response message including timing advance information. - View Dependent Claims (14)
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Specification