Information and Communications Magazine (정보와 통신)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
권호 표지

클라우드 무선 접속 네트워크 개요와 주요 이슈 분석

  • Published : 2013.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

최근 4세대 이동통신은 기술/경제적인 이유로 클라우드 기지국 (또는 C-RAN: Cloud Radio Access Network) 구조를 택하는 추세이다. C-RAN은 기존 일체형 기지국에서의 MAC/PHY 기능을 담당하는 BBU(Base Band Unit)와 RF신호 송수신 만을 담당하는 RRH(Remote Radio Head)로 분리된 기지국 구조를 가지며, RRH의 무선 송수신 신호는 중앙의 BBU에 집중되어 처리된다. 본고에서는 BBU와 RRH로 분리되어 설치/운용되는 C-RAN의 구조와 기지국 가상화 개념을 소개하며, 향후 이동통신시스템에서의 기술동향과 관련하여 C-RAN에서 발생할 수 있는 이슈들을 살펴본다.

Keywords

References

  1. Chaina Mobile Research Institute, "C-RAN: The road towards green RAN," White Paper, http://labs.chinamobile.com/article download.php?id=104035.
  2. K. I. Pedersen, P. H. Michaelsen, and C. Rosa, S. Barbera ,"Mobility Enhancements for LTE-Advanced Multilayer Networks with Inter-Site Carrier Aggregation," Communication Magazine, May, 2013
  3. T. Nakamura, S. Nagata, A. Benjebbour, Y. Kishiyama, T. Hai, S. Xiaodong, Y. Ning, and L. Nan, "Trends in Small Cell Enhancements in LTE Advanced," Communication Magazine, Febuary, 2013
  4. M. Iwamura et al., "Carrier Aggregation Framework in 3GPP LTE-Advanced," IEEE Commun. Mag., vol. 48, no. 8, Aug. 2010, pp. 60-67.
  5. Liu, Cheng, et al. "The case for re-configurable backhaul in cloud-RAN based small cell networks." INFOCOM, 2013 Proceedings IEEE. IEEE, 2013.
  6. Yang, Qing, et al. "BigStation: enabling scalable realtime signal processing in large mu-mimo systems." Proceedings of the ACM SIGCOMM 2013 conference on SIGCOMM. ACM, 2013.
  7. Shepard, Clayton, et al. "Argos: practical manyantenna base stations." Proceedings of the 18th annual international conference on Mobile computing and networking. ACM, 2012.
  8. C. Lee, C.-B. Chae, T. Kim, S. Choi, and J. Lee, "Network massive MIMO for cell-boundary users: From a precoding normalization perspective,"in Proc. IEEE Glob. Telecom. Conf., 2012, pp. 1-5.
  9. H. Yang and T. L. Marzetta Lee, "Performance of conjugate and zeroforcing beamforming in largescale antenna systems," IEEE Jour. Select. Areas in Comm., vol. 31, no. 2, pp. 172-179, Feb. 2013. https://doi.org/10.1109/JSAC.2013.130206
  10. S. Bhaumik, S. Preeth Chandrabose, M. K. Jataprolu, G. Kumar, A. Muralidhar, P. Polakos, V. Srinivasan, and T.s Woo "CloudIQ: A Framework for Processing Base Stations in a Data Center," in Proc. ACM Mobicom, 2012.
  11. "CPRI specification v5.0 (2011-09-21)," http://www.cpri.info/downloads/CPRI v 5 0 2011-09-21.pdf.
  12. S. Park, C. Chae, S. Bahk, " Before/After Precoded Massive MIMO in Cloud Radio Access Networks," Journal of Communications and Networks, Aug. 2013
  13. T. L. Marzetta, "Noncooperative cellular wireless with unlimited numbers of base station antennas," IEEE Trans. Wireless Comm., vol. 9, no. 11, pp. 3590-3600, Nov. 2010. https://doi.org/10.1109/TWC.2010.092810.091092
  14. Hejazi, Seyed Amin, and Shawn P. Stapleton. "Virtual Cells versus Small Cells for In-Building Radio Planning." Journal of Selected Areas in Telecommunications, October, 2012.
  15. S.-B. Yun, S.-Y. Park and Y.-W. Lee, "Hybrid division duplex system for next-generation cellular services," IEEE Trans. Veh. Technol., Vol.56 (5), pp. 3040-3059, 2007. https://doi.org/10.1109/TVT.2007.900389
  16. W. Jeong and M. Kavehrad, "Cochannel interference reducation in dynamic-TDD fixed wireless applications using time slot allocation algorithms," IEEE Trans. Commun., vol. 50, pp. 1627-1636, Oct. 2002. https://doi.org/10.1109/TCOMM.2002.803991
  17. 3GPP TS 37.104, "Multi-Standard Radio (MSR) Base Station (BS) radio transmission and reception"
  18. ETSI GS ORI 001: "Open Radio Equipment Interface (ORI); Requirements for Open Radio equipment Interface (ORI) (Release 1)," vol. 1. 2. 1, 2012. 8.
  19. ETSI GS ORI 002-1: " Open Radio equipment Interface (ORI); ORI Interface Specification; Part 1: Low Layers (Release 1)," vol. 1. 2. 1, 2012. 8.
  20. ETSI GS ORI 002-2: " Open Radio Equipment Interface (ORI); ORI Interface Specification; Part 2: Control and Management (Release 1)," vol. 1. 1. 1, 2012. 8.
  21. 3GPP "Overview of 3GPP Release 11 V0.1.5 (2013-06)"
  22. 3GPP "Overview of 3GPP Release 12 V0.0.9 (2013-06)"
  23. http://www.obsai.org/.
  24. Z. Zhu, P. Gupta, Q. Wang, S.Lalyanaraman, Y. Lin, H. Franke, and S. Sarangi, "Virtual base station pool: towards a wireless network cloud for radio access networks," in Proc. of the 8th ACM International Conference on Computing Frontiers, 2011.
  25. I. Gomez-Miguelez, V. Marojevic, and A.Gelonch. "Deployment and management of SDR cloud computing resources: problem definition and fundamental limits." EURASIP Journal on Wireless Communications and Networking, Jan. 2013
  26. H. Li, J. Hajipour, A. Attar, and V. Leung, "Efficient hetnet implementation using broadband wireless access with fiber-connected massively distributed antennas architecture," in IEEE Wireless Communications Magazine, Jun 2011
  27. Guangjie, Li, et al., "Architecture of GPP based, scalable, large-scale C-RAN BBU pool," Globecom Workshops, 2012.