Cell measurement and special function small cell selection method and apparatus for use in a mobile communication system
Disclosed is a method by a base station in a wireless communication system. The method includes receiving cell measurement information related to the serving and neighboring cells from at least one terminal served by the base station, receiving status information including load information on serving cells of the small cell base station from the small cell base station, determining a secondary cell group (SCG) of the serving cells of the small cell base station that are capable of serving the terminal based on the cell measurement information and the status information and transmitting information on the SCG to the small cell base station.
1. A method by a master base station in a wireless communication system, the method comprising:
receiving measurement information from a terminal;
transmitting, to a secondary base station, a first message including measurement result for a secondary cell group (SCG) of the secondary base station based on the measurement information;
receiving, from the secondary base station, a second message including information on a SCG configuration, the information on the SCG configuration including information on a primary secondary cell (PSCell) of the SCG; and
transmitting, to the terminal, a third message including the information on the PSCell,
wherein the information on the PSCell includes a physical cell identifier of the PSCell, an SCell index of the PSCell and configuration information on a physical uplink control channel (PUCCH) of the PSCell.
2. The method of claim 1 , wherein the PSCell is used for transmitting the PUCCH through the secondary base station.
3. The method of claim 1 , wherein the third message is a radio resource control (RRC) connection reconfiguration message.
4. The method of claim 1 , wherein the PSCell is selected by the secondary base station based on the measurement result in first message.
5. A master base station in a wireless communication system, the master base station comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to control the transceiver to:
receive measurement information from a terminal,
transmit, to a secondary base station, a first message including measurement result for a secondary cell group (SCG) of the secondary base station based on the measurement information,
receive, from the secondary base station, a second message including information on a SCG configuration, the information on the SCG configuration including information on a primary secondary cell (PSCell) of the SCG, and
transmit, to the terminal, a third message including the information on the PSCell,
wherein the information on the PSCell includes a physical cell identifier of the PSCell, an SCell index of the PSCell and configuration information on a physical uplink control channel (PUCCH) of the PSCell.
6. The master base station of claim 5 , wherein the PSCell is used for transmitting the PUCCH through the secondary base station.
7. The master base station of claim 5 , wherein the third message is a radio resource control (RRC) connection reconfiguration message.
8. The master base station of claim 5 , wherein the PSCell is selected by the secondary base station based on the measurement result in first message.
9. A method by a secondary base station in a wireless communication system, the method comprising:
receiving, from a master base station, a first message including measurement result for a secondary cell group (SCG) of the secondary base station;
determining a primary secondary cell (PSCell) based on the measurement result; and
transmitting, to the master base station, a second message including information on a SCG configuration, the information on the SCG configuration including information on the PSCell of the SCG,
wherein the information on the PSCell includes a physical cell identifier of the PSCell, an SCell index of the PSCell and configuration information on a physical uplink control channel (PUCCH) of the PSCell.
10. The method of claim 9 , wherein the PSCell is used for transmitting a PUCCH of a terminal through the secondary base station.
11. A secondary base station in a wireless communication system, the secondary base station comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
control the transceiver to receive, from a master base station, a first message including measurement result for a secondary cell group (SCG) of the secondary base station,
determine a primary secondary cell (PSCell) based on the measurement result, and
control the transceiver to transmit, to the master base station, a second message including information on a SCG configuration, the information on the SCG configuration including information on the PSCell of the SCG,
wherein the information on the PSCell includes a physical cell identifier of the PSCell, an SCell index of the PSCell and configuration information on a physical uplink control channel (PUCCH) of the PSCell.
12. The secondary base station of claim 11 , wherein the PSCell is used for transmitting a PUCCH of a terminal through the secondary base station.
13. A method by a terminal in a wireless communication system, the method comprising:
transmitting measurement information to a master base station;
receiving a message including information on a primary secondary cell (PSCell) of a secondary base station from the master base station; and
transmitting control information through a physical uplink control channel (PUCCH) of the PSCell,
wherein the PSCell is determined by the secondary base station, and
wherein the information on the PSCell includes a physical cell identifier of the PSCell, an SCell index of the PSCell and configuration information on a physical uplink control channel (PUCCH) of the PSCell.
14. The method of claim 13 , wherein a secondary cell group (SCG) configuration includes the information on the PSCell, and
wherein the SCG configuration is transmitted from the secondary base station to the master base station.
15. The method of claim 13 , wherein the message is a radio resource control, RRC, connection reconfiguration message.
16. A terminal in a wireless communication system, the terminal comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to control the transceiver to:
transmit measurement information to a master base station,
receive a message including information on a primary secondary cell (PSCell) of a secondary base station from the master base station, and
transmit control information through a physical uplink control channel (PUCCH) of the PSCell,
wherein the PSCell is determined by the secondary base station, and
wherein the information on the PSCell includes a physical cell identifier of the PSCell, an SCell index of the PSCell and configuration information on a physical uplink control channel (PUCCH) of the PSCell.
17. The terminal of claim 16 , wherein a secondary cell group (SCG) configuration includes the information on the PSCell, and
wherein the SCG configuration is transmitted from the secondary base station to the master base station.
18. The terminal of claim 16 , wherein the message is a radio resource control, RRC, connection reconfiguration message.