Device and method for fronthaul transmission in wireless communication system

Patent metadata

Field	Value
Publication number	US-2026032472-A1
Application number	US-202519348283-A
Country	US
Kind code	A1
Filing date	Oct 2, 2025
Priority date	Jul 30, 2021
Publication date	Jan 29, 2026
Grant date	—

Abstract

The disclosure relates to a pre-5 th -Generation (5G) or 5G communication system to provide for supporting higher data rates beyond a 4 th -Generation (4G) communication system. A method performed by a distributed unit (DU) in a wireless communication system is provided. The method includes transmitting one or more data streams of a message of a control plane or a user plane, which correspond to one or more layers, to a radio unit (RU) through a first fronthaul port, and transmitting a data stream corresponding to an access layer, which is the first layer used for connection of a cell among the one or more layers, to the RU through a second fronthaul port configured between the DU and the RU.

First claim

What is claimed is:

1 . A method performed by a distributed unit (DU) in a wireless communication system, the method comprising:
transmitting, to a radio unit (RU) via a first fronthaul port, one or more data streams including a first data stream corresponding to a default layer; and transmitting, to the RU via a second fronthaul port, the first data stream, wherein the first data stream is transmitted via the second fronthaul port:
in response to detecting a failure of the first fronthaul port, or
as a redundant data stream.

2 . The method of claim 1 ,
wherein the default 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 other layers of a 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 the detection of the failure of the first fronthaul port, identifying the second fronthaul port and mapping a layer other than the default layer to the RU ports of the second fronthaul port.

4 . The method of claim 1 , wherein the default 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 default layer among the one or more layers to the RU port of the second fronthaul port.

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

7 . The method of claim 1 , wherein the default layer is related with at least one of a master information block (MIB) of a cell, a physical downlink control channel (PDCCH), a synchronization signal/physical broadcast channel (SS/PBCH) block (SSB), a physical downlink shared channel (PDSCH) of a 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) via a first fronthaul port, one or more data streams including a first data stream corresponding to a default layer; and receiving, from the DU via a second fronthaul port, the first data stream, wherein the first data stream is received via the second fronthaul port:
in response to detecting a failure of the first fronthaul port, or
as a redundant data stream.

9 . The method of claim 8 ,
wherein the default 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 other layers of a message in the second fronthaul port.

10 . The method of claim 9 , further comprising:
detecting a failure of the first fronthaul port; and in response to the detection of the failure of the first fronthaul port, identifying the second fronthaul port and mapping a layer other than the default layer to the RU ports of the second fronthaul port.

11 . The method of claim 8 , wherein the default layer is mapped to an RU port of the second fronthaul port.

12 . The method of claim 11 , further comprising:
mapping a layer other than the default layer among the one or more layers to the RU port of the second fronthaul port.

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

14 . The method of claim 8 , wherein the default layer is related with at least one of a master information block (MIB) of a cell, a physical downlink control channel (PDCCH), a synchronization signal/physical broadcast channel (SS/PBCH) block (SSB), a physical downlink shared channel (PDSCH) of a 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) via a first fronthaul port, one or more data streams including a first data stream corresponding to a default layer, and
transmit, to the RU via a second fronthaul port, the first data stream, and
wherein the first data stream is transmitted via the second fronthaul port:
in response to detecting a failure of the first fronthaul port, or
as a redundant data stream.

16 . The device of claim 15 ,
wherein the default 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 other layers of a 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; and in response to the detection of the failure of the first fronthaul port:
identify the second fronthaul port, and
map a layer other than the default layer to the RU ports of the second fronthaul port.

18 . A device of a radio unit (RU) 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:
receive, from a distributed unit (DU) via a first fronthaul port, one or more data streams including a first data stream corresponding to a default layer, and
receive, from the DU via a second fronthaul port, the first data stream, and
wherein the first data stream is received via the second fronthaul port:
in response to detecting a failure of the first fronthaul port, or
as a redundant data stream.

19 . The device of claim 18 ,
wherein the default 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 other layers of a message in the second fronthaul port.

20 . The device of claim 19 , wherein the at least one processor is further configured to:
detect a failure of the first fronthaul port; and in response to the detection of the failure of the first fronthaul port:
identify the second fronthaul port, and
map a layer other than the default layer to the RU ports of the second fronthaul port.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jeon Namryul
• Ko Jaeyun
• Seol Daeyoung

Classifications

• H04W24/04 Primary

  Arrangements for maintaining operational condition · CPC title

• H04W88/085

  Access point devices with remote components · CPC title

• H04L69/40

  for recovering from a failure of a protocol instance or entity, e.g. service redundancy protocols, protocol state redundancy or protocol service redirection (management of faults, events, alarms or notifications in data switching networks H04L41/06) · CPC title