전자통신동향분석 (Electronics and Telecommunications Trends)

한국전자통신연구원 (Electronics and Telecommunications Research Institute)
권호 표지
DOI QR코드

DOI QR Code

개방형 5G 프론트홀 기술 동향

Technological Trends in Open 5G Fronthaul

  • 발행 : 2022.06.02
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Traditional centralized radio access network architecture used for 4G is based on Option 8, a functional split between PHY and RF. This option is commonly used with a fronthaul interface based on common public radio interface (CPRI) specifications; however, the increased data rates in 5G make this option impractical because of the fronthaul interface's high bandwidth requirement. Since CPRI specifications have many vendor-specific options, achieving multi-vendor interoperability becomes challenging. Open RAN (O-RAN) Alliance is developing novel open fronthaul interface specifications based on the functional split Option 7-2x, one of the intra-PHY split options, to relax the bandwidth requirement of the fronthaul interface and achieve multi-vendor interoperability. This article provides a brief overview of the various functional split options for 5G fronthaul that have been reported so far and existing fronthaul technologies. Further, the technological trends in the 5G open fronthaul interface is discussed, focusing on the O-RAN Alliance specifications under standardization.

키워드

과제정보

이 논문은 2022년도 정부(과학기술정보통신부)의 재원으로 정보통신기획평가원의 지원을 받아 수행된 연구임[No. 2019-0-01360, 동적 기능분할을 지원하는 개방형 기지국 분산 유닛(DU) 기술 개발].

참고문헌

  1. CPRI Specification V7.0, Common Public Radio Interface (CPRI); Interface Specification, 2015.
  2. eCPRI Specification V1.2, Common Public Radio Interface: eCPRI Interface Specification, 2018.
  3. 5G 포럼, "개방형 5G 프론트홀 시장 전망 및 산업계 활성화 방안," 2021.
  4. O-RAN Alliance Working Group 4(Open Fronthaul Interfaces WG), "Control, user and synchronization plane specification 8.0," 2021.
  5. O-RAN Alliance Working Group 4(Open Fronthaul Interfaces WG), "Management plane specification 8.0," 2021.
  6. 3GPP TR 38.801 V14.0.0, Study on New Radio Access Technology: Radio Access Architecture and Interfaces, 2017.
  7. IETF, RFC 6241, Network Configuration Protocol (NETCONF), 2011.
  8. IETF, RFC 7950, The YANG 1.1 Data Modeling Language, 2016.
  9. O-RAN Alliance Working Group 1, "O-RAN architecture description 3.0," 2021.
  10. O-RAN Alliance White Paper, "O-RAN use cases and deployment scenarios," 2020.
  11. O-RAN Alliance White Paper, "O-RAN: Towards an open and smart RAN," 2018