Method for separating physical layer functions in wireless communication system

Patent metadata

Field	Value
Publication number	US-2022407593-A1
Application number	US-202217890501-A
Country	US
Kind code	A1
Filing date	Aug 18, 2022
Priority date	Jan 8, 2018
Publication date	Dec 22, 2022
Grant date	—

Abstract

The present disclosure relates to a communication method and a system thereof that fuses a 5G communication system, for supporting data transmission rates higher than 4G systems, with IoT technology. The present disclosure can be applied to intelligent services (e.g. smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail, or security and safety related services), on the basis of 5G communication technology and IoT related technology. The present disclosure relates to a method and a device for separating physical layer functions of a base station.

First claim

What is claimed is:

1 . A method performed by a first entity performing high physical layer functions of a base station in a wireless communication system, the method comprising:
identifying a fronthaul interface between the first entity and a second entity performing low physical layer functions of the base station; and exchanging a control plane message or a user plane message with the second entity via the fronthaul interface, wherein the low physical layer functions include a digital beamforming, wherein the high physical layer functions include a modulation and a resource element (RE) mapping for a downlink and a demodulation and a RE demapping for an uplink, and wherein the control plane message and the user plane message are identified based on a subtype field of radio over ethernet (ROE).

2 . The method of claim 1 , wherein the low physical layer functions further include a precoding for the downlink and a physical random access channel (PRACH) filtering for the uplink.

3 . The method of claim 2 , wherein the low physical layer functions further include:
an inverse Fast Fourier Transform (iFFT) and a cyclic prefix (CP) addition for the downlink, and an FFT, and a CP removal for the uplink.

4 . The method of claim 1 ,
wherein in case of the downlink, the fronthaul interface is provided between a function of the RE mapping in the first entity and a function of the digital beamforming in the second entity, and wherein in case of the uplink, the fronthaul interface is provided between a function of the RE demapping in the first entity and the function of the digital beamforming in the second entity.

5 . The method of claim 1 , wherein the exchanging of the control plane message or the user plane message comprises:
transmitting, to the second entity via the fronthaul interface, the control plane message including scheduling information for the uplink and the downlink and information on the digital beamforming.

6 . A method performed by a second entity performing low physical layer functions of a base station in a wireless communication system, the method comprising:
identifying a fronthaul interface between a first entity performing high physical layer functions of the base station and the second entity; and exchanging a control plane message or a user plane message with the first entity via the fronthaul interface, wherein the low physical layer functions include a digital beamforming, wherein the high physical layer functions include a modulation and a resource element (RE) mapping for a downlink and a demodulation and a RE demapping for an uplink, and wherein the control plane message and the user plane message are identified based on a subtype field of radio over ethernet (ROE).

7 . The method of claim 6 , wherein the low physical layer functions further include a precoding for the downlink and a physical random access channel (PRACH) filtering for the uplink.

8 . The method of claim 7 , wherein the low physical layer functions further include:
an inverse Fast Fourier Transform (iFFT) and a cyclic prefix (CP) addition for the downlink, and an FFT, and a CP removal for the uplink.

9 . The method of claim 6 ,
wherein in case of the downlink, the fronthaul interface is provided between a function of the RE mapping in the first entity and a function of the digital beamforming in the second entity, and wherein in case of the uplink, the fronthaul interface is provided between a function of the RE demapping in the first entity and the function of the digital beamforming in the second entity.

10 . The method of claim 6 , wherein the exchanging of the control plane message or the user plane message comprises:
receiving, from the first entity via the fronthaul interface, the control plane message including scheduling information for the uplink and the downlink and information on the digital beamforming.

11 . A first entity performing high physical layer functions of a base station in a wireless communication system, the first entity comprising:
a transceiver configured to transmit and receive a signal; and at least one processor coupled with the transceiver and configured to:
identify a fronthaul interface between the first entity and a second entity performing low physical layer functions of the base station, and
exchange a control plane message or a user plane message with the second entity via the fronthaul interface,
wherein the low physical layer functions include a digital beamforming, wherein the high physical layer functions include a modulation and a resource element (RE) mapping for a downlink and a demodulation and a RE demapping for an uplink, and wherein the control plane message and the user plane message are identified based on a subtype field of radio over ethernet (ROE).

12 . The first entity of claim 11 , wherein the low physical layer functions further include a precoding for the downlink and a physical random access channel (PRACH) filtering for the uplink.

13 . The first entity of claim 12 , wherein the low physical layer functions further include:
an inverse Fast Fourier Transform (iFFT) and a cyclic prefix (CP) addition for the downlink, and an FFT, and a CP removal for the uplink.

14 . The first entity of claim 11 ,
wherein in case of the downlink, the fronthaul interface is provided between a function of the RE mapping in the first entity and a function of the digital beamforming in the second entity, and wherein in case of the uplink, the fronthaul interface is provided between a function of the RE demapping in the first entity and the function of the digital beamforming in the second entity.

15 . The first entity of claim 11 , wherein the at least one processor is configured to transmit, to the second entity via the fronthaul interface, the control plane message including scheduling information for the uplink and the downlink and information on the digital beamforming.

16 . A second entity performing low physical layer functions of a base station in a wireless communication system, the second entity comprising:
a transceiver configured to transmit and receive a signal; and at least one processor coupled with the transceiver and configured to:
identify a fronthaul interface between a first entity performing high physical layer functions of the base station and the second entity, and
exchange a control plane message or a user plane message with the first entity via the fronthaul interface,
wherein the low physical layer functions include a digital beamforming, wherein the high physical layer functions include a modulation and a resource element (RE) mapping for a downlink and a demodulation and a RE demapping for an uplink, and wherein the control plane message and the user plane message are identified based on a subtype field of radio over ethernet (ROE).

17 . The second entity of claim 16 , wherein the low physical layer functions further include a precoding for the downlink and a physical random access channel (PRACH) filtering for the uplink.

18 . The second entity of claim 17 , wherein the low physical layer functions further include:
an inverse Fast Fourier Transform (iFFT) and a cyclic prefix (CP) addition for the downlink, and an FFT, and a CP removal for the uplink.

19 . The second entity of claim 16 ,
wherein in case of the downlink, the fronthaul interface is provided between a function of the RE mapping in the first entity and a function of the digital beamforming in the second entity, and wherein i

Assignees

• Samsung Electronics Co Ltd

Inventors

• Moon Jicheol
• Kwon Ojin
• Jeon Namryul

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/21

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04B7/2603 Primary

  Arrangements for wireless physical layer control (H04B7/2612 takes precedence) · CPC title

• H04L27/2628

  Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators (H04L27/2634 takes precedence) · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title