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http://dx.doi.org/10.1109/JCN.2016.000023

Cloud Radio Access Network: Virtualizing Wireless Access for Dense Heterogeneous Systems  

Simeone, Osvaldo (New Jersey Institute of Technology)
Maeder, Andreas (NOKIA Networks)
Peng, Mugen (Beijing University of Posts and Telecommunications)
Sahin, Onur (InterDigital)
Yu, Wei (University of Toronto)
Publication Information
Journal of Communications and Networks / v.18, no.2, 2016 , pp. 135-149 More about this Journal
Abstract
Cloud radio access network (C-RAN) refers to the virtualization of base station functionalities by means of cloud computing. This results in a novel cellular architecture in which low-cost wireless access points, known as radio units or remote radio heads, are centrally managed by a reconfigurable centralized "cloud", or central, unit. C-RAN allows operators to reduce the capital and operating expenses needed to deploy and maintain dense heterogeneous networks. This critical advantage, along with spectral efficiency, statistical multiplexing and load balancing gains, make C-RAN well positioned to be one of the key technologies in the development of 5G systems. In this paper, a succinct overview is presented regarding the state of the art on the research on C-RAN with emphasis on fronthaul compression, baseband processing, medium access control, resource allocation, system-level considerations and standardization efforts.
Keywords
Backhaul; cloud radio access networks; common public radio interface (CPRI); cloud radio access network (C-RAN); 5G; fronthaul; radio resource management;
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  • Reference
1 China Mobile, "C-RAN: the road towards green RAN," White Paper, ver. 2.5, China Mobile Research Institute, Oct. 2011.
2 Huawei, "Cloud RAN Introduction. The 4th CJK International Workshop Technology Evolution and Spectrum," Sept. 2011.
3 H. Guan, T. Kolding, and P. Merz, "Discovery of Cloud-RAN," Nokia Siemens Networks, Tech. Rep., April 2010.
4 "BTS System Reference Document Version 2.0," Open Base Station Architecture Initiative. Nov. 14, 2006. Retrieved August 16, 2013.
5 B. Dai and W. Yu, "Sparse beamforming and user-centric clustering for downlink Cloud Radio Access Network," IEEE Access, vol. 2, pp. 1326-1339, 2014.   DOI
6 R. Zakhour, and D. Gesbert, "Optimized data sharing in multicell MIMO with finite backhaul capacity," IEEE Trans. Signal Process., vol. 59, no. 12, pp. 6102-6111, Dec. 2011.   DOI
7 P. Marsch and G. Fettweis, "Uplink CoMP under a constrained backhaul and imperfect channel knowledge," IEEE Trans. Wireless Commun., vol. 10, no. 6, pp. 1730-1742, June 2011.   DOI
8 Small Cell Forum, "Small cell virtualization functional splits and use cases", White Paper, June 2015.
9 NGMN Alliance, "Further study on critical C-RAN technologies", Mar. 2015.
10 3GPP, "TS 36.300 V12.5.0; Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (EUTRAN); Overall description," Mar. 2015.
11 3GPP, "TS 36.213 V10.4.0; Physical layer procedures," Dec. 2011.
12 INFSO-ICT-317941 iJOIN, "Deliverable D5.3; Final definition of iJOIN architecture", Apr. 2015.
13 P. Rost and A. Prasad, "Opportunistic Hybrid ARQ-Enabler of Centralized-RAN over non-ideal backhaul", IEEE Wireless Commun. Lett., vol. 3, no. 5, pp. 481-484, 2014   DOI
14 S. Khalili and O. Simeone, "Uplink HARQ for Distributed and Cloud RAN via Separation of Control and Data Planes," available on arXiv (arXiv:1508.06570).
15 Q. Han, C. Wang, M. Levorato, and O. Simeone, "On the effect of fronthaul latency on ARQ in C-RAN systems," submitted, available on arXiv (arXiv:1510.07176).
16 INFSO-ICT-317941 iJOIN, "Deliverable D3.3; Final definition and evaluation of MAC and RRM approaches for RANaaS and a joint backhaul/ access design," Apr. 2015.
17 R. Fritzsche, P. Rost, G. Fettweis, "Robust proportional fair scheduling with imperfect channel state information", accepted for publication in IEEE Trans. Wireless Commun., 2015.
18 E. Pateromichelakis, M. Shariat, A. Quddus, and R. Tafazolli, "Graph-based multicell scheduling in OFDMA-based small cell networks", IEEE Access, vol. 2, pp.897-908, 2014.   DOI
19 M. Neely, Stochastic network optimization with application to communication and queueing systems, Morgan & Claypool Publishers, 2010.
20 G. Scutari, F. Facchinei, L. Lampariello, and P. Song, "Distributed methods for constrained nonconvex multi-agent optimization-Part I: Theory," arXiv:1410.4754.
21 S.-H. Park, O. Simeone, O. Sahin, and S. Shamai (Shitz), "Performance evaluation of multiterminal backhaul compression for cloud radio access networks," in Proc. CISS, Princeton, NJ, Mar. 19-21, 2014.
22 Q. Shi, M. Razaviyayn, Z. Luo, and C. He, "An iteratively weighted MMSE approach to distributed sum-utility maximization for a MIMO interfering broadcast channel," IEEE Trans. Signal Process., vol. 59, no. 9, pp. 4331-4340, Sept. 2011.   DOI
23 J. Tang, W. Tay, and T. Quek, "Cross-layer resource allocation with elastic service scaling in cloud radio access network," IEEE Trans. Wireless Commun., vol. PP, no. 99, p. 1, May. 2015.
24 L. Zhou and W. Yu, "Optimized backhaul compression for uplink cloud radio access network," IEEE J. Sel. Areas Commun., vol. 32, no. 6, pp. 1295-1307, June 2014.   DOI
25 M. J. Wainwright, "Sparse graph codes for side information and binning," IEEE Signal Process. Mag., vol. 24, no. 5, pp. 47-57, Sept. 2007.   DOI
26 S.-H. Park, O. Simeone, O. Sahin, and S. Shamai (Shitz), "Joint precoding and multivariate backhaul compression for the downlink of cloud radio access networks," IEEE Trans. Signal Process., vol. 61, no. 22, pp. 5646-5658, Nov. 2013.   DOI
27 D. Gesbert, S. Hanly, H. Huang, S. Shamai (Shitz), O. Simeone, and Wei Yu, "Multi-Cell MIMO cooperative networks: A new look at interference," IEEE J. Sel. Areas Commun., vol. 28, no. 9, pp. 1380-1408, Dec. 2010.   DOI
28 A. Gersho and R. M. Gray, Vector quantization and signal compression, Kluwer Acad. Press, 1992.
29 P. Patil, B. Dai, and W. Yu, "Performance comparison of data-sharing and compression strategies for cloud radio-access networks," in Proc. EUSIPCO, 2015.
30 D. Wubben, P. Rost, J. Bartelt, M. Lalam, V. Savin, M. Gorgoglione, A. Dekorsy, and G. Fettweis, "Benefits and impact of cloud computing on 5G signal processing: Flexible centralization through cloud-RAN." IEEE Signal Process. Mag., no. 31, pp. 35-44, 2014.
31 Integrated Device Technology, Inc., "Front-haul compression for emerging C-RAN and small cell networks," Apr. 2013.
32 D. Samardzija, J. Pastalan, M. MacDonald, S. Walker, and R. Valenzuela, "Compressed transport of baseband signals in radio access networks," IEEE Trans. Wireless Commun., vol. 11, no. 9, pp. 3216-3225, Sept. 2012.   DOI
33 B. Guo, W. Cao, A. Tao, and D. Samardzija, "CPRI compression transport for LTE and LTE-A signal in C-RAN," in Proc. Int. ICST Conf. CHINACOM, 2012, pp. 843-849.
34 K. F. Nieman and B. L. Evans, "Time-domain compression of complex-baseband LTE signals for cloud radio access networks," in Proc. IEEE GlobalSIP, 2013, pp. 1198-1201.
35 A. Vosoughi, M. Wu, and J. R. Cavallaro, "Baseband signal compression in wireless base stations," in Proc. IEEE GLOBECOM, Dec. 2012, pp. 4505-4511.
36 A. Sanderovich, O. Somekh, H. V. Poor, and S. Shamai (Shitz), "Uplink macro diversity of limited backhaul cellular network," IEEE Trans. Inf. Theory, vol. 55, no. 8, pp. 3457-3478, Aug. 2009.   DOI
37 J. Lorca and L. Cucala, "Lossless compression technique for the fronthaul of LTE/LTE-advanced cloud-RAN architectures," in Proc. IEEE WoW-MoM, June 2013, pp. 1-9.
38 S. Grieger, S. Boob, and G. Fettweis, "Large scale field trial results on frequency domain compression for uplink joint detection," in Proc. IEEE GLOBECOM, 2012, pp. 1128-1133.
39 A. E. Gamal and Y.-H. Kim, Network information theory, Cambridge University Press, 2011.
40 A. del Coso and S. Simoens, "Distributed compression for MIMO coordinated networks with a backhaul constraint," IEEE Trans. Wireless Commum., vol. 8, no. 9, pp. 4698-4709, Sept. 2009.   DOI
41 S.-H. Park, O. Simeone, O. Sahin, and S. Shamai (Shitz), "Robust and efficient distributed compression for cloud radio access networks," IEEE Trans. Veh. Technol., vol. 62, no. 2, pp. 692-703, Feb. 2013.   DOI
42 H. Bo, V. Gopalakrishnan, L. Ji, and S. Lee, "Network function virtualization: Challenges and opportunities for innovations," IEEE Commun. Mag., vol. 53, no. 2, pp. 90-97, Feb. 2015.   DOI
43 A. Checko et al., "Cloud RAN for mobile networks - A technology overview," IEEE Commun. Surveys Tuts., vol. 17, no. 1, pp. 405-426, 2015.   DOI
44 H. Al-Raweshidy and S. Komaki, Radio over fiber technologies for mobile communications networks. Artech House, 2002.
45 J. Kang, O. Simeone, J. Kang, and S. Shamai (Shitz), "Fronthaul compression and precoding design for C-RANs over ergodic fading channels," to appear in IEEE Trans. Veh. Technol.
46 L. Zhou andW. Yu, "Uplink multicell processing with limited backhaul via per-base-station successive interference cancellation," IEEE J. Sel. Areas Commun., vol. 31, no. 10, pp. 1981-1993, Oct. 2013.   DOI
47 S.-H. Park, O. Simeone, O. Sahin, and S. Shamai (Shitz), "Joint decompression and decoding for cloud radio access networks," IEEE Signal Process. Lett., vol. 20, no. 5, pp. 503-506, May 2013.   DOI
48 Y. Zhou and W. Yu, "Optimized beamforming and backhaul compression for uplink MIMO cloud radio-access networks," in Proc. IEEE GLOBECOM, 2014.
49 Jian Zhao, T. S. Quek, and Zhongding Lei, "Coordinated multipoint transmission with limited backhaul data transfer," IEEE Trans. Wireless Commun., vol. 12, no. 6, pp. 2762-2775, June 2013.   DOI
50 Yuanming Shi, Jun Zhang, and K. B. Letaief, "Group sparse beamforming for green Cloud-RAN," IEEE Trans. Wireless Commun., vol. 13, no. 5, pp. 2809-2823, May 2014.   DOI
51 A. Liu and V. Lau, "Joint power and antenna selection optimization in large cloud radio access networks," IEEE Trans. Signal Process., vol. 62, no. 5, pp. 1319-1328, Mar. 2014.   DOI
52 Fuxin Zhuang and V. K. N. Lau, "Backhaul limited asymmetric cooperation forMIMO cellular networks via semidefinite relaxation," IEEE Trans. Signal Process., vol. 62, no. 3, pp. 684-693, Feb. 2014.   DOI
53 Ghebretensae et al., "Transmission solutions and architectures for heterogeneous networks built as C-RANs." in Proc. International Conference on Communications and Networking in China, 2012.
54 C. Lu, M. Berg, E. Trojer, P.-E. Eriksson, K. Laraqui, O. V. Tidbl, and H. Almeida, "Connecting the dots: small cells shape up for high-performance indoor radio," Ericsson Review, 2014.
55 Jun Zhang, Runhua Chen, J. G. Andrews, A. Ghosh, and R. W. Heath, "Networked MIMO with clustered linear precoding," IEEE Trans. Wireless Commun., vol. 8, no. 4, pp. 1910-1921, Apr. 2009.   DOI
56 Ericsson AB, Huawei Technologies, NEC Corporation, Alcatel Lucent, and Nokia Siemens Networks, "Common public radio interface (CPRI); interface specification," CPRI specification v5.0, Sept. 2011.
57 U. Dotsch, M. Doll, H. P. Mayer, F. Schaich, J. Segel, and P. Sehier, "Quantitative analysis of split base station processing and determination of advantageous architectures for LTE." Bell Labs Tech. J., vol. 18, no. 1, pp. 105-128, 2013.   DOI
58 ETSI ORI ISG, [Online]. Available: http://portal.etsi.org/tb.aspx?tbid=738&SubTB=738
59 ETSINFV ISG, "Network Functions Virtualisation," Dec., 2012, [Online]. Available: http://portal.etsi.org/portal/server.pt/community/NFV/367
60 "The benefits of Cloud-RAN architecture in mobile network expansion", Fujitsu, White paper, 2015.
61 O. Simeone, N. Levy, A. Sanderovich, O. Somekh, B. M. Zaidel, H. V. Poor, and S. Shamai (Shitz), "Cooperative wireless cellular systems: an information-theoretic view," Foundations and Trends in Communications and Information Theory, vol. 8, nos. 1-2, pp. 1-177, 2012.
62 S. Hur, T. Kim, D. J. Love, J. V. Krogmeier, T. A. Thomas, and A. Ghosh, "Millimeter wave beamforming for wireless backhaul and access in small cell networks," IEEE Trans. Commun., vol. 61, no. 10, pp. 4391-4403, Oct. 2013.   DOI
63 Z. Zhao et al., "Cluster formation in cloud radio access networks: performance analysis and algorithms design," in Proc. ICC, London, UK, June 2015, pp. 1-6.
64 S.-H. Park, O. Simeone, O. Sahin, and S. Shamai (Shitz), "Multi-hop backhaul compression for the uplink of cloud radio access networks," arXiv:1312.7135.
65 P. Rost et al., "Cloud technologies for flexible 5G radio access networks," IEEE Commun. Mag., vol. 52, no. 5, pp. 68-76, Apr. 2014.
66 S.-H. Park, O. Simeone, O. Sahin, and S. Shamai (Shitz), "Fronthaul compression for cloud radio access networks: Signal processing advances inspired by network information theory," IEEE Signal Process. Mag., vol. 31, no. 6, pp. 69-79, 2014.   DOI
67 A. Liu and V. Lau, "Joint power and antenna selection optimization in large cloud radio access networks," IEEE Trans. Signal Process., vol. 62, no. 5, pp. 1319-1328, Mar. 2014.   DOI
68 S. Luo, R. Zhang, and T.J. Lim, "Downlink and uplink energy minimization through user association and beamforming in C-RAN," IEEE Trans. Wireless Commun., vol. 14, no. 1, pp. 494-508, Jan. 2015.   DOI
69 M. Peng et al., "Contract-based interference coordination in heterogeneous cloud radio access networks," IEEE J. Sel. Areas Commun., vol. 33, no. 6, pp. 1140-1153, Mar. 2015.   DOI
70 M. L. Puterman, Markov Decision Processes: Discrete Stochastic Dynamic Programming, Wiley-Interscience, 2005.
71 J. Li, M. Peng, A. Cheng, Y. Yu, and C. Wang, "Resource allocation optimization for delay-sensitive traffic in fronthaul constrained cloud radio access networks," IEEE Syst. J., pp. 1-12, Nov. 2014.
72 A. de la Oliva et al., "Xhaul: Towards an Integrated Fronthaul/ Backhaul Architecture in 5G Networks," [Online]. Available: http://eprints.networks.imdea.org/1059/1/Xhaul_Towards_Integrated_Fronthaul_Backhaul_2015_EN.pdf
73 J. Li, M. Peng, A. Cheng, and Y. Yu, "Delay-aware cooperative multipoint transmission with backhaul limitation in cloud-RAN," in Proc. IEEE ICC, Sydney, Australia, June. 2014, pp. 665-670.
74 P. Teseng, "Convergence of a block coordinate descent method for nondifferentiable minimization," J. Opt. Theory App., vol. 109, no. 3, pp. 475-494, June 2001.   DOI
75 J. Li, J. Wu, M. Peng, W.Wang, and V. K. N. Lau, "Queue-aware joint remote radio head activation and beamforming for green cloud radio access networks," in Proc. IEEE GLOBECOM, San Diego, USA, Dec. 2015.
76 J. Li, M. Peng, Y. Yu, and A. Cheng, "Dynamic resource optimization with congestion control in heterogeneous cloud radio access networks," in Proc. IEEE GLOBECOM, Austin, USA, Dec. 2014, pp. 906-911.
77 L. Jingchu, T. Zhao, S. Zhou, Y. Cheng, and Z. Niu, "Concert: a cloud-based architecture for next-generation cellular systems," IEEE Wireless Commun., vol. 21, no. 6, pp. 14-22, 2014.   DOI
78 J. Segel and M. Weldon, "Lightradio portfolio-technical overview," Technology White Paper 1, Alcatel-Lucent.