METHOD AND APPARATUS OF CONFIGURING DOWNLINK TIMING AND TRANSMITTING RANDOM ACCESS RESPONSE IN MOBILE COMMUNICATION SYSTEM USING CARRIER AGGREGATION
First Claim
1. A method for uplink timing adjustment by a base station, the method comprising:
- generating a medium access control (MAC) protocol data unit (PDU) including a MAC control element (MAC CE), wherein the MAC CE includes an identity of a timing advance group (TAG) and a timing advance command (TAC) associated with the TAG; and
transmitting the MAC PDU to a terminal,wherein the TAG is a group of at least one cell having same uplink timing, andwherein the identity of the TAG is set to 0 if the TAG is a primary TAG including a primary cell.
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Abstract
A method of configuring downlink timings and transmitting a random access response message is provided for a random access procedure in a Long Term Evolution (LTE) system supporting carrier aggregation. The method for adjusting timing of a terminal in a wireless communication system supporting carrier aggregation of at least one carrier includes transmitting a Random Access Preamble to a base station, and receiving a Random Access Response with a Timing Advance Command (TAC) for commanding uplink timing adjustment from the base station, wherein the Random Access Response comprises information indicating a Timing Advance Group (TAG) to which the TAC is applied.
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Citations
20 Claims
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1. A method for uplink timing adjustment by a base station, the method comprising:
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generating a medium access control (MAC) protocol data unit (PDU) including a MAC control element (MAC CE), wherein the MAC CE includes an identity of a timing advance group (TAG) and a timing advance command (TAC) associated with the TAG; and transmitting the MAC PDU to a terminal, wherein the TAG is a group of at least one cell having same uplink timing, and wherein the identity of the TAG is set to 0 if the TAG is a primary TAG including a primary cell. - View Dependent Claims (2, 3, 4, 5)
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6. A base station for uplink timing adjustment, the base station comprising:
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a transceiver configured to transmit and receive a signal; and a controller configured to generate a medium access control (MAC) protocol data unit (PDU) including a MAC control element (MAC CE), wherein the MAC CE includes an identity of a timing advance group (TAG) and a timing advance command (TAC) associated with the TAG and to transmit the MAC PDU to a terminal, wherein the TAG is a group of at least one cell having same uplink timing, and wherein the identity of the TAG is set to 0 if the TAG is a primary TAG including a primary cell. - View Dependent Claims (7, 8, 9, 10)
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11. A method for uplink timing adjustment by a terminal, the method comprising:
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receiving, from a base station, a medium access control (MAC) protocol data unit (PDU) including a MAC control element (MAC CE), wherein the MAC CE includes an identity of a timing advance group (TAG) and a timing advance command (TAC) associated with the TAG; identifying that the TAG is a primary TAG including a primary cell if the identity of the TAG is set to 0; and adjusting uplink timing for at least one cell in the timing advance group (TAG) based on the received MAC PDU, wherein the TAG is a group of at least one cell having same uplink timing. - View Dependent Claims (12, 13, 14, 15)
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16. A terminal for uplink timing adjustment, the terminal comprising:
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a transceiver configured to transmit and receive a signal; and a controller configured to receive, from a base station, a medium access control (MAC) protocol data unit (PDU) including a MAC control element (MAC CE), wherein the MAC CE includes an identity of a timing advance group (TAG) and a timing advance command (TAC) associated with the TAG, to identity that the TAG is a primary TAG including a primary cell if the identity of the TAG is set to 0, and to adjust uplink timing for at least one cell in the TAG based on the received MAC PDU, wherein the TAG is a group of at least one cell having same uplink timing. - View Dependent Claims (17, 18, 19, 20)
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Specification