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:
- transmitting, to a terminal, a radio resource control message to configure a secondary cell (SCell) for a carrier aggregation (CA);
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) including the SCell and a timing advance command (TAC) for uplink timing adjustment of the TAG including the SCell; and
transmitting the MAC PDU to the terminal,wherein the TAG is a group of at least one cell having same uplink timing,wherein the identity of the TAG is set to 0 if the TAG including the SCell is a primary TAG (PTAG), andwherein the PTAG is a TAG that includes a primary cell (PCell).
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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.
29 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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transmitting, to a terminal, a radio resource control message to configure a secondary cell (SCell) for a carrier aggregation (CA); 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) including the SCell and a timing advance command (TAC) for uplink timing adjustment of the TAG including the SCell; and transmitting the MAC PDU to the terminal, wherein the TAG is a group of at least one cell having same uplink timing, wherein the identity of the TAG is set to 0 if the TAG including the SCell is a primary TAG (PTAG), and wherein the PTAG is a TAG that includes a primary cell (PCell). - 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; transmit, to a terminal, a radio resource control message to configure a secondary cell (SCell) for carrier aggregation (CA), 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) including the SCell and a timing advance command (TAC) for uplink timing adjustment of the TAG including the SCell, and transmit the MAC PDU to the terminal, wherein the TAG is a group of at least one cell having same uplink timing, wherein the identity of the TAG is set to 0 if the TAG including the SCell is a primary TAG (PTAG), and wherein the PTAG is a TAG which includes a primary cell (PCell). - 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 radio resource control message to configure a secondary cell (SCell) for a carrier aggregation (CA); receiving, from the 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 including the SCell; identifying that the TAG including the SCell is a primary TAG (PTAG) if the identity of the TAG is set to 0, wherein the PTAG is a TAG that includes a primary cell (PCell) of the terminal; and adjusting 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 (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 radio resource control message to configure a secondary cell (SCell) for a carrier aggregation (CA), receive, from the 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 including the SCell, identify that the TAG including the SCell is a primary TAG (PTAG) if the identity of the TAG is set to 0, wherein the PTAG is a TAG that includes a primary cell (PCell) of the terminal, and 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