Method for transmitting and receiving single-cell multi-transmission data and apparatus therefor

1. A method for receiving, by a user equipment (UE), single-cell multi-transmission data, the method comprising:

receiving system information for single-cell multi-transmission in a primary cell (PCell), wherein the single-cell multi-transmission performs group communication through a Physical Downlink Shared Channel (PDSCH) radio resource shared with other UEs included in a same group in the primary cell;

receiving single-cell multi-transmission control information in the primary cell, wherein the single-cell multi-transmission control information is information for controlling the single-cell multi-transmission; and

identifying whether a neighboring cell provides the single-cell multi-transmission using the single-cell multi-transmission control information,

wherein the single-cell multi-transmission control information comprises cell identification information on a neighboring cell providing the single-cell multi-transmission, group communication service identification information (Temporary Mobile Group Identity: TMGI) that the neighboring cell provides, and information on the neighboring cell providing the single-cell multi-transmission associated with group identification information (Group-Radio Network Temporary Identifier: G-RNTI),

wherein the single-cell multi-transmission control information is indicated through a Physical Downlink Control Channel (PDCCH) and is scheduled by the system information, and

wherein the method comprises requesting to receive a group communication service through unicast to one of a group communication service application server, a base station, and a broadcast/multicast server before a cell change to the neighboring cell when the neighboring cell does not provide single-cell multi-transmission.

2. The method as claimed in claim 1 , further comprising performing a cell reselection procedure by assigning a top priority to a frequency of a cell providing single-cell multi-transmission.

3. A method for transmitting, by a base station, single-cell multi-transmission data, the method comprising:

transmitting system information for single-cell multi-transmission in a primary cell (PCell) wherein the single-cell multi-transmission performs group communication through a Physical Downlink Shared Channel (PDSCH) radio resource shared with UEs included in a same group in the primary cell;

generating single-cell multi-transmission control information for controlling the single-cell multi-transmission; and

transmitting the single-cell multi-transmission control information to a user equipment (UE) in the primary cell,

wherein the single-cell multi-transmission control information comprises cell identification information on a neighboring cell providing single-cell multi-transmission, group communication service identification information (Temporary Mobile Group Identity: TMGI) that the neighboring cell provides, and information on the neighboring cell providing single-cell multi-transmission associated with group identification information (Group-Radio Network Temporary Identifier: G-RNTI),

wherein the single-cell multi-transmission control information is indicated through a Physical Downlink Control Channel (PDCCH) and is scheduled by the system information, and

wherein user equipment (UE) identifies whether a neighboring cell provides single-cell multi-transmission using the single-cell multi-transmission control information and requests to receive a group communication service through unicast to one of a group communication service application server, the base station, and a broadcast/multicast server before a cell change to the neighboring cell when the neighboring cell is identified as not providing single-cell multi-transmission.

4. The method as claimed in claim 3 , wherein user equipment (UE) performs a cell reselection procedure by assigning a top priority to a frequency of a cell providing single-cell multi-transmission.

5. A user equipment (UE) for receiving single-cell multi-transmission data, the UE comprising:

a receiver configured to receive system information for single-cell multi-transmission in a primary cell (PCell) and to receive single-cell multi-transmission control information in the primary cell, wherein the single-cell multi-transmission performs group communication through a Physical Downlink Shared Channel (PDSCH) radio resource shared with other UEs included in a same group in the primary cell and the single-cell multi-transmission control information is information for controlling the single-cell multi-transmission; and

a controller configured to identify whether a neighboring cell provides single-cell multi-transmission using the single-cell multi-transmission control information,

wherein the single-cell multi-transmission control information comprises cell identification information on a neighboring cell providing single-cell multi-transmission, group communication service identification information (Temporary Mobile Group Identity: TMGI) that the neighboring cell provides, and information on the neighboring cell providing single-cell multi-transmission associated with group identification information (Group-Radio Network Temporary Identifier: G-RNTI),

wherein the single-cell multi-transmission control information is indicated through a Physical Downlink Control Channel (PDCCH) and is scheduled by the system information, and

wherein the method comprises requesting to receive a group communication service through unicast to one of a group communication service application server, a base station, and a broadcast/multicast server before a cell change to the neighboring cell when the neighboring cell does not provide single-cell multi-transmission.

6. The UE as claimed in claim 5 , wherein the controller performs a cell reselection procedure by assigning a top priority to a frequency of a cell providing single-cell multi-transmission.