Device and method for fronthaul transmission in wireless communication system

Patent metadata

Field	Value
Publication number	US-12464381-B2
Application number	US-202218146219-A
Country	US
Kind code	B2
Filing date	Dec 23, 2022
Priority date	Jul 30, 2021
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

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) 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.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Jeon Namryul
• Ko Jaeyun
• Seol Daeyoung

Classifications

• 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

• H04W24/04 Primary

  Arrangements for maintaining operational condition · CPC title