IP Library › Granted Patent US 12,550,203

Granted Patent B2

US 12,550,203 · App. 18/013,869 · Granted Feb 10, 2026

Method for transmitting and receiving data in wireless communication system supporting full duplex communication, and apparatus therefor

Inventors: Dongsoo Shin (Seoul, KR); Woochan Kim (Seoul, KR)

Assignee: LG ELECTRONICS INC.

H04W76/10 H04L5/14 H04W48/08 H04L5/1438

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Quick Facts

Patent No.: US 12,550,203
App. No.: 18/013,869
Granted: Feb 10, 2026
Kind: B2

External Links

USPTO Patent Center↗ Full Patent PDF↗

Abstract

The present document discloses a method for transmitting and receiving data by user equipment in a wireless communication system, the method comprising the steps of: receiving a master information block (MIB) from a base station; transmitting a radio resource control (RRC) connection request to the base station on the basis of the MIB; and receiving, from the base station, a response to the RRC connection request, wherein the MIB includes information about one or more duplex modes supportable by the base station, and the RRC connection request includes information about a duplex mode supportable by the user equipment.

Claims (74)

1 . A method performed by a user equipment (UE), the method comprising:

receiving, from a base station (BS), a primary synchronization signal and a secondary synchronization signal;

acquiring synchronization with the BS and a cell identifier (ID) based on the primary synchronization signal and the secondary synchronization signal;

receiving, from the BS, a physical broadcast channel (PBCH);

obtaining a Master Information Block (MIB) based on the PBCH;

transmitting, to the BS, a Radio Resource Control (RRC) setup request message based on the MIB; and

receiving, from the BS, a response to the RRC setup request message,

wherein the MIB includes information on one or more duplex modes supported by the BS and the RRC setup request message includes information on a duplex mode supported by the UE,

wherein the information on the one or more duplex modes supported by the BS includes a bitmap, and

wherein the bitmap indicates whether a Half Duplex (HD) mode, a Full Duplex (FD), a Frequency Division Duplex (FDD) mode, a Time Division Duplex (TDD) mode, and a Space Division Duplex (SDD) mode are supported by the BS.

2 . The method of claim 1 , wherein the form of bitmap includes 1 bit indicating one of the HD mode and the FD mode and 2 bits indicating one of the FDD mode, the TDD mode, the SDD mode, and a reserved mode.

3 . The method of claim 1 , wherein the bitmap includes 5 bits corresponding to HD-FDD, HD-TDD, FD-FDD, FD-TDD, and FD-SDD, respectively.

4 . The method of claim 1 , further comprising determining whether the duplex mode supported by the UE exists in the one or more duplex modes supported by the BS based on the MIB,

wherein, based on a case that the duplex mode supported by the UE does not exist, the response to the RRC setup request message is an RRC reject message, and

wherein, based on a case that the duplex mode supported by the UE exists, the response to the RRC setup request message is an RRC setup message.

5 . The method of claim 4 , wherein the RRC reject message includes information on another BS different from the BS.

6 . The method of claim 5 , further comprising:

performing a cell search based on the information on the another BS.

7 . The method of claim 6 , further comprising:

attempting the cell search again after changing the duplex mode of the UE or waiting for a specific time.

8 . A user equipment (UE) comprising:

a transceiver; and

a processor configured to:

receive, from a base station (BS), a primary synchronization signal and a secondary synchronization signal;

acquire synchronization with the BS and a cell identifier (ID) based on the primary synchronization signal and the secondary synchronization signal;

receive, from the BS, a physical broadcast channel (PBCH);

obtaining a Master Information Block (MIB) based on the PBCH:

transmit, to the BS, a Radio Resource Control (RRC) setup request message based on the MIB; and

receive, from the BS, a response to the RRC setup request message,

wherein the MIB includes information on one or more duplex modes supportable supported by the BS and the RRC setup request message includes information on a duplex mode supported by the UE,

wherein the information on the one or more duplex modes supported by the BS includes a bitmap, and

9 . A method performed by a base station (BS), the method comprising:

transmitting, to a user equipment (UE), a primary synchronization signal and a secondary synchronization signal;

transmitting, to the UE, a Master Information Block (MIB) through a physical broadcast channel (PBCH);

receiving, from the UE, a Radio Resource Control (RRC) setup request message based on the MIB; and

transmitting, to the UE, a response to the RRC setup request message,

wherein the MIB includes information on one or more duplex modes supported by the BS and the RRC setup request message includes information on a duplex mode supported by the UE,

wherein the information on the one or more duplex modes supported by the BS includes a bitmap, and

wherein the bitmap indicates whether a Half Duplex (HD) mode, a Full Duplex (FD) mode, a Frequency Division Duplex (FDD) mode, a Time Division Duplex (TDD) mode, and a Space Division Duplex (SDD) mode are supported by the BS.

10 . The method of claim 9 ,

wherein the bitmap includes 1 bit indicating one of the HD mode and the FD mode and 2 bits indicating one of the FDD mode, the TDD mode, the SDD mode, and a reserved mode.

11 . A base station (BS) comprising:

a transceiver; and

a processor configured to;

transmit, to a user equipment (UE), a primary synchronization signal and a secondary synchronization signal;

transmit, to the UE, a Master Information Block (MIB) through a physical broadcast channel (PBCH);

receive, from the UE, a Radio Resource Control (RRC) setup request message based on the MIB; and

transmit, to the UE, a response to the RRC setup request message,

wherein the MIB includes information on one or more duplex modes supported by the BS and the RRC setup request message includes information on a duplex mode supported by the UE

wherein the information on the one or more duplex modes supported by the BS includes a bitmap, and

12 . An apparatus for a user equipment (UE), the apparatus comprising:

at least one processor; and

at least one computer memory operably connected to the at least one processor and storing instructions enabling the at least one processor to perform operations when executed, the operations comprising:

receiving, from a base station (BS), a primary synchronization signal and a secondary synchronization signal;

acquiring synchronization with the BS and a cell identifier (ID) based on the primary synchronization signal and the secondary synchronization signal;

receiving, from the BS, a physical broadcast channel (PBCH);

obtaining a Master Information Block (MIB) based on the PBCH;

transmitting, to the BS, a Radio Resource Control (RRC) setup request message based on the MIB; and

receiving, from the BS, a response to the RRC setup request message,

wherein the MIB includes information on one or more duplex modes supportable supported by the BS and the RRC setup request includes information on a duplex mode supported by the UE,

wherein the information on the one or more duplex modes supported by the BS includes a bitmap, and

13 . A non-transitory computer-readable storage medium storing at least one computer program including an instruction enabling at least one processor to perform an operation for a user equipment when executed by the at least one processor, the operation comprising: