Granted Patent B2

US 12,349,131 · App. 17/953,830 · Granted Jul 1, 2025

Inventor: Anil Agiwal (Suwon-si, KR)

Assignee: Samsung Electronics Co., Ltd.

H04W72/1268H04W72/23H04W72/51

Abstract

Claims (37)

1. A method performed by a reduced capability user equipment (RedCap UE) in a wireless communication system, the method comprising:

receiving, from a base station, a system information block 1 (SIB1) including first information on a first initial uplink (UL) bandwidth part (BWP);

identifying whether second information on a second initial UL BWP for the RedCap UE is configured;

in response to the second information being configured, the SIB1 including second configuration information on a system information (SI) request for the RedCap UE, and criteria to select a normal uplink (NUL) carrier being met, transmitting, to the base station, a physical random access channel (PRACH) preamble for requesting an SI message on the second initial UL BWP based on the second configuration information;

in response to the second information not being configured, the SIB1 including first configuration information on the SI, and the criteria to select the NUL carrier being met, transmitting, to the base station, the PRACH preamble for requesting the SI message on the first initial UL BWP based on the first configuration information;

in response to the SIB1 not including the first configuration information, transmitting, to the base station, a radio resource control (RRC) message for requesting the SI message on the first initial UL BWP; and

receiving, from the base station, the requested SI message.

2. The method of claim 1 ,

wherein the criteria to select the NUL carrier is met in case that a reference signal received power (RSRP) measured for a downlink (DL) of a serving cell is greater or equal to a threshold.

3. A method performed by a base station in a wireless communication system, the method comprising:

transmitting, to a reduced capability user equipment (RedCap UE), a system information block 1 (SIB1) including first information on a first initial uplink (UL) bandwidth part (BWP);

in response to second information on a second initial UL BWP for the RedCap UE being configured, the SIB1 including second configuration information on a system information (SI) request for the RedCap UE, and criteria to select a normal uplink (NUL) carrier being met, receiving, from the RedCap UE, a physical random access channel (PRACH) preamble for requesting an SI message on the second initial UL BWP based on the second configuration information;

in response to the second information not being configured, the SIB1 including first configuration information on the SI, and the criteria to select the NUL carrier being met, receiving, from the RedCap UE, the PRACH preamble for requesting the SI message on the first initial UL BWP based on the first configuration information;

in response to the SIB1 not including the first configuration information, receiving, from the RedCap UE, a radio resource control (RRC) message for requesting the SI message on the first initial UL BWP; and

transmitting, to the RedCap UE, the requested SI message.

4. The method of claim 3 ,

wherein the criteria to select the NUL carrier is met in case that a reference signal received power (RSRP) measured for a downlink (DL) of a serving cell is greater or equal to a threshold.

5. A reduced capability user equipment (RedCap UE) in a wireless communication system, the RedCap UE comprising:

a transceiver configured to transmit and receive signals; and

a controller coupled with the transceiver and configured to:

receive, from a base station, a system information block 1 (SIB1) including first information on a first initial uplink (UL) bandwidth part (BWP),

identify whether second information on a second initial UL BWP for the RedCap UE is configured,

in case that the second information is configured, the SIB1 includes second configuration information on a system information (SI) request for the RedCap UE, and criteria to select a normal uplink (NUL) carrier is met, transmit, to the base station, a physical random access channel (PRACH) preamble for requesting an SI message on the second initial UL BWP based on the second configuration information,

in case that the second information is not configured, the SIB1 includes first configuration information on the SI, and the criteria to select the NUL carrier is met, transmit, to the base station, the PRACH preamble for requesting the SI message on the first initial UL BWP based on the first configuration information,

in case that the SIB1 does not include the first configuration information, transmit, to the base station, a radio resource control (RRC) message for requesting the SI message on the first initial UL BWP, and

receive, from the base station, the requested SI message.

6. The RedCap UE of claim 5 ,

wherein the criteria to select the NUL carrier is met in case that a reference signal received power (RSRP) measured for a downlink of a serving cell is greater or equal to a threshold.

7. A base station in a wireless communication system, the base station comprising:

a transceiver configured to transmit and receive signals; and

a controller coupled with the transceiver and configured to:

transmit, to a reduced capability user equipment (RedCap UE), a system information block 1 (SIB1) including first information on a first initial uplink (UL) bandwidth part (BWP),

in case that second information on a second initial UL BWP for the RedCap UE is configured, the SIB1 includes second configuration information on a system information (SI) request for the RedCap UE, and criteria to select a normal uplink (NUL) carrier is met, receive, from the RedCap UE, a physical random access channel (PRACH) preamble for requesting an SI message on the second initial UL BWP based on the second configuration information,

in case that the second information is not configured, the SIB1 includes first configuration information on the SI, and the criteria to select the NUL carrier is met, receive, from the RedCap UE, the PRACH preamble for requesting the SI message on the first initial UL BWP based on the first configuration information,

in case that the SIB1 does not include the first configuration information, receive, from the RedCap UE, a radio resource control (RRC) message for requesting the SI message on the first initial UL BWP, and

transmit, to the RedCap UE, the requested SI message.

8. The base station of claim 7 , wherein the criteria to select the NUL carrier is met in case that a reference signal received power (RSRP) measured for a downlink of a serving cell is greater or equal to a threshold.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (82)