Granted Patent B2

US 12,464,381 · App. 18/146,219 · Granted Nov 4, 2025

Inventors: Namryul Jeon (Suwon-si, KR); Jaeyun Ko (Suwon-si, KR); Daeyoung Seol (Suwon-si, KR)

Assignee: Samsung Electronics Co., Ltd.

H04W24/04

Abstract

Claims (59)

1 . A method performed by a distributed unit (DU) in a wireless communication system, the method comprising:

transmitting, to a radio unit (RU) through a first fronthaul port, one or more data streams including a first data stream corresponding to an access layer, which is a first layer among one or more layers used for connection of a cell, and one or more second data streams of a message of a control plane or a user plane, which correspond to one or more other layers; and

transmitting, to the RU through a second fronthaul port configured between the DU and the RU, the first data stream corresponding to the access layer.

2 . The method of claim 1 ,

wherein the access layer is mapped to an additional RU port of the second fronthaul port, and

wherein the additional RU port is different from RU ports allocated for layers of the message in the second fronthaul port.

3 . The method of claim 2 , further comprising:

detecting a failure of the first fronthaul port; and

in response to detecting the failure of the first fronthaul port, identifying the second fronthaul port and mapping a layer other than the access layer among the one or more layers to the RU ports of the second fronthaul port.

4 . The method of claim 1 , further comprising:

detecting a failure of the first fronthaul port; and

in response to detecting the failure of the first fronthaul port, identifying the second fronthaul port,

wherein the access layer is mapped to an RU port of the second fronthaul port.

5 . The method of claim 4 , further comprising:

mapping a layer other than the access layer among the one or more layers to the RU port of the second fronthaul port.

6 . The method of claim 1 , wherein the access layer corresponds to a lowest layer ID among layer IDs of the DU.

7 . The method of claim 1 , wherein the access layer is related with at least one of a master information block (MIB) of the cell, a physical downlink control channel (PDCCH), a synchronization signal/physical broadcast channel (SS/PBCH) synchronization signal block (SSB), a physical downlink shared channel (PDSCH) of the first layer, a cell-specific reference signal (CRS) of the first fronthaul port, or a channel state information-reference signal (CSI-RS) of the first fronthaul port.

8 . A method performed by a radio unit (RU) in a wireless communication system, the method comprising:

receiving, from a distributed unit (DU) through a first fronthaul port, one or more data streams including a first data stream corresponding to an access layer, which is a first layer among one or more layers used for connection of a cell, and one or more second data streams of a first message of a control plane or a user plane, which correspond to one or more other layers; and

receiving, from the DU through a second fronthaul port configured between the DU and the RU, a first data stream corresponding to the access layer.

9 . The method of claim 8 ,

wherein the access layer is associated with an additional RU port of the second fronthaul port, and

wherein the additional RU port is different from RU ports allocated for layers of the first message in the second fronthaul port.

10 . The method of claim 9 , further comprising:

obtaining first information by decoding a data stream delivered from the first fronthaul port;

obtaining second information by decoding a data stream delivered from the second fronthaul port; and

in response to redundancy being identified based on a comparison result of the first information and the second information, transmitting, to a terminal, a second message based on the first information.

11 . The method of claim 8 , further comprising:

in response to detecting a failure of the first fronthaul port, decoding the first data stream corresponding to the access layer, which is delivered from the second fronthaul port.

12 . The method of claim 11 , further comprising:

decoding a data stream corresponding to a layer other than the access layer received through an RU port of the second fronthaul port among the one or more layers.

13 . The method of claim 8 , wherein the access layer corresponds to a lowest layer ID among layer IDs of the DU.

14 . The method of claim 8 , wherein the access layer is related to at least one of:

a master information block (MIB) of the cell;

a physical downlink control channel (PDCCH);

a synchronization signal/physical broadcast t channel (SS/PBCH) synchronization signal block (SSB);

a physical downlink shared channel (PDSCH) of the first layer;

a cell-specific reference signal (CRS) of the first fronthaul port; or

a channel state information-reference signal (CSI-RS) of the first fronthaul port.

15 . A device of a distributed unit (DU) in a wireless communication system, the device comprising:

at least one transceiver; and

at least one processor communicatively coupled to the at least one transceiver,

wherein the at least one processor is configured to:

transmit, to a radio unit (RU) through a first fronthaul port, one or more data streams including a first data stream corresponding to an access layer, which is a first layer among one or more layers used for connection of a cell, and one or more second data streams of a message of a control plane or a user plane, which correspond to one or more other layers, and

transmit, to the RU through a second fronthaul port configured between the DU and the RU, the first data stream corresponding to the access layer.

16 . The device of claim 15 ,

wherein the access layer is mapped to an additional RU port of the second fronthaul port, and

wherein the additional RU port is different from RU ports allocated for layers of the message in the second fronthaul port.

17 . The device of claim 16 , wherein the at least one processor is further configured to:

detect a failure of the first fronthaul port,

in response to detecting the failure of the first fronthaul port, identify the second fronthaul port, and

map a layer other than the access layer among the one or more layers to RU ports of the second fronthaul port.

18 . The device of claim 15 , wherein the at least one processor is further configured to:

detect a failure of the first fronthaul port,

in response to detecting the failure of the first fronthaul port, identify the second fronthaul port, wherein the access layer is mapped to an RU port of the second fronthaul port, and

transmit the mapped access layer to the RU.

19 . The device of claim 18 , wherein the at least one processor is further configured to:

map a layer other than the access layer among the one or more layers to the RU port of the second fronthaul port.

20 . The device of claim 15 , wherein the access layer corresponds to a lowest layer ID among layer IDs of the DU.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (24)