Radio terminal, radio station, radio communication system, and methods implemented therein
First Claim
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1. A method for a user equipment, the method comprising:
- receiving, in a first cell as a Primary Cell (PCell) operated in a licensed frequency band, a Radio Resource Control (RRC) Connection Reconfiguration message from the base station, the RRC Connection Reconfiguration message including measurement configuration information and Secondary Cell To Add Mod List (SCellToAddModList) information,wherein the measurement configuration includes;
first frequency information associated with the PCell operated in the licensed frequency band,second frequency information associated with a second cell operated in an unlicensed frequency band, andthird frequency information associated with a third cell operated in the unlicensed frequency band,wherein the SCellToAddModList information includes;
the second frequency information and a Secondary Cell (SCell) index associated with the second cell, andthe third frequency information and an SCell index associated with the third cell;
adding the second cell as a first SCell based on the SCellToAddModList information;
adding the third cell as a second SCell based on the SCellToAddModList information;
measuring Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ) of reference signals transmitted in the PCell;
measuring RSRP and RSRQ of reference signals transmitted in the added first SCell;
measuring RSRP and RSRQ of reference signals transmitted in the added second SCell;
reporting, in the PCell to the base station, a measurement report including;
the RSRP and the RSRQ in the PCell,the RSRP and the RSRQ in the first SCell, andthe RSRP and the RSRQ in the second SCell,receiving, from the base station, control information for using at least one SCell operated in the unlicensed frequency band that have been selected from among the first SCell and the second SCell, after reporting the measurement report; and
performing Carrier Aggregation using the PCell operated in the licensed frequency band and the at least one SCell operated in the unlicensed frequency band.
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Abstract
A radio terminal (2) is used in a radio communication system (100) and communicates with a radio station (1). The radio terminal (2) includes a measurement unit (20). The measurement unit (20) operates to perform, using a terminal measurement procedure for executing a first terminal measurement corresponding to radio access technology applied to the radio communication system (100), a second terminal measurement of a shared frequency shared by a plurality of radio systems including the radio communication system (100).
27 Citations
4 Claims
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1. A method for a user equipment, the method comprising:
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receiving, in a first cell as a Primary Cell (PCell) operated in a licensed frequency band, a Radio Resource Control (RRC) Connection Reconfiguration message from the base station, the RRC Connection Reconfiguration message including measurement configuration information and Secondary Cell To Add Mod List (SCellToAddModList) information, wherein the measurement configuration includes; first frequency information associated with the PCell operated in the licensed frequency band, second frequency information associated with a second cell operated in an unlicensed frequency band, and third frequency information associated with a third cell operated in the unlicensed frequency band, wherein the SCellToAddModList information includes; the second frequency information and a Secondary Cell (SCell) index associated with the second cell, and the third frequency information and an SCell index associated with the third cell; adding the second cell as a first SCell based on the SCellToAddModList information; adding the third cell as a second SCell based on the SCellToAddModList information; measuring Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ) of reference signals transmitted in the PCell; measuring RSRP and RSRQ of reference signals transmitted in the added first SCell; measuring RSRP and RSRQ of reference signals transmitted in the added second SCell; reporting, in the PCell to the base station, a measurement report including; the RSRP and the RSRQ in the PCell, the RSRP and the RSRQ in the first SCell, and the RSRP and the RSRQ in the second SCell, receiving, from the base station, control information for using at least one SCell operated in the unlicensed frequency band that have been selected from among the first SCell and the second SCell, after reporting the measurement report; and performing Carrier Aggregation using the PCell operated in the licensed frequency band and the at least one SCell operated in the unlicensed frequency band.
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2. A method for a base station, the method comprising:
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transmitting, in a first cell as a Primary Cell (PCell) operated in a licensed frequency band, a Radio Resource Control (RRC) Connection Reconfiguration message to a user equipment, the RRC Connection Reconfiguration message including measurement configuration information and Secondary Cell To Add Mod List (SCellToAddModList) information, wherein the measurement configuration includes; first frequency information associated with the PCell operated in the licensed frequency band, second frequency information associated with a second cell operated in an unlicensed frequency band, and third frequency information associated with a third cell operated in the unlicensed frequency band, wherein the SCellToAddModList information includes; the second frequency information and a Secondary Cell (SCell) index associated with the second cell, and the third frequency information and an SCell index associated with the third cell, receiving, from the user equipment in the PCell, a measurement report including; Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ), which are measured by the user equipment, of reference signals transmitted in the PCell, RSRP and RSRQ, which are measured by the user equipment, of reference signals transmitted in the second cell which has been added as a first SCell based on the SCellToAddModList information, and RSRP and RSRQ, which are measured by the user equipment, of reference signals transmitted in the third cell which has been added as a second SCell based on the SCellToAddModList information; transmitting, to the user equipment, control information for using at least one SCell operated in the unlicensed frequency band that have been selected from among the first SCell and the second SCell, after receiving the measurement report; and performing communication, with the user equipment, using the PCell and the at least one SCell for Carrier Aggregation using the PCell operated in the licensed frequency band and the at least one SCell operated in the unlicensed frequency band.
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3. A user equipment comprising:
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a transceiver; and a processor configured to receive, via the transceiver in a first cell as a Primary Cell (PCell) operated in a licensed frequency band, a Radio Resource Control (RRC) Connection Reconfiguration message from the base station, the RRC Connection Reconfiguration message including measurement configuration information and Secondary Cell To Add Mod List (SCellToAddModList) information, wherein the measurement configuration information includes; first frequency information associated with the PCell operated in the licensed frequency band, second frequency information associated with a second cell operated in an unlicensed frequency band, and third frequency information associated with a third cell operated in the unlicensed frequency band, wherein the SCellToAddModList information includes; the second frequency information and an SCell index associated with the second cell, and the third frequency information and an SCell index associated with the third cell, wherein the processor is further configured to; add the second cell as a first SCell based on the SCellToAddModList information; add the third cell as a second SCell based on the SCellToAddModList information; measure Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ) of reference signals transmitted in the PCell; measure RSRP and RSRQ of reference signals transmitted in the added first SCell; and measure RSRP and RSRQ of reference signals transmitted in the added second SCell; report, in the PCell to the base station, a measurement report including; the RSRP and the RSRQ in the PCell, the RSRP and the RSRQ in the first SCell, and the RSRP and the RSRQ in the second SCell, receive, via the transceiver from the base station, control information for using at least one SCell operated in the unlicensed frequency band that have been selected from among the first SCell and the second SCell, after reporting the measurement report; and perform Carrier Aggregation using the PCell operated in the licensed frequency band and the at least one SCell operated in the unlicensed frequency band.
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4. A base station comprising:
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a transceiver; and a processor configured to transmit, in a first cell as a Primary Cell (PCell) operated in a licensed frequency band, a Radio Resource Control (RRC) Connection Reconfiguration message to a user equipment, the RRC Connection Reconfiguration message including measurement configuration information and Secondary Cell To Add Mod List (SCellToAddModList) information, wherein the measurement configuration includes; first frequency information associated with the PCell operated in the licensed frequency band, second frequency information associated with a second cell operated in an unlicensed frequency band, and third frequency information associated with a third cell operated in the unlicensed frequency band, wherein the SCellToAddModList information includes; the second frequency information and a Secondary Cell (SCell) index associated with the second cell, and the third frequency information and an SCell index associated with the third cell, wherein the processor is further configured to; receive, from the user equipment in the PCell, a measurement report including; Reference Signal Received Power (RSRP) and Reference Signal Received Quality (RSRQ), which are measured by the user equipment, of reference signals transmitted in the PCell, RSRP and RSRQ, which are measured by the user equipment, of reference signals transmitted in the second cell which has been added as a first SCell based on the SCellToAddModList information, and RSRP and RSRQ, which are measured by the user equipment, of reference signals transmitted in the third cell which has been added as a second SCell based on the SCellToAddModList information, transmit, to a user equipment, control information for using at least one SCell operated in the unlicensed frequency band that have been selected from among the first SCell and the second SCell, after receiving the measurement report; and perform communication, with the user equipment, using the PCell and the at least one SCell for Carrier Aggregation using the PCell operated in the licensed frequency band and the at least one SCell operated in the unlicensed frequency band.
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Specification