Recent Advances in Cloud Radio Access Networks: System Architectures, Key Techniques, and Open Issues

IEEE Communications Surveys and Tutorials

Volumn 18, Issue 3, 2016, Pages 2282-2308

  Peng, Mugen ^a   Sun, Yaohua ^a   Li, Xuelong ^b   Mao, Zhendong ^a   Wang, Chonggang ^c  

^a BEIJING UNIVERSITY OF POSTS AND TELECOMMUNICATIONS   (China)

^b XI AN INSTITUTE OF OPTICS AND PRECISION MECHANICS   (China)

^c INTERDIGITAL COMMUNICATIONS   (United States)

Author keywords

channel estimation; Cloud radio access network (C RAN); fronthaul compression; large scale collaborative processing; resource allocation

Indexed keywords

BIG DATA; CHANNEL ESTIMATION; COGNITIVE RADIO; COMPUTER ARCHITECTURE; DATA MINING; ENERGY EFFICIENCY; NETWORK ARCHITECTURE; NETWORK LAYERS; RADIO; RESOURCE ALLOCATION; SOFTWARE TESTING;

HIGH SPECTRAL EFFICIENCY; PHYSICAL LAYER SECURITY; RADIO ACCESS NETWORKS; RADIO RESOURCE ALLOCATION; RESEARCH COMMUNITIES; STATE OF THE ART; SYSTEM ARCHITECTURES; THEORETICAL PERFORMANCE;

C (PROGRAMMING LANGUAGE);

EID: 84983735493     PISSN: None     EISSN: 1553877X     Source Type: Journal    
DOI: 10.1109/COMST.2016.2548658     Document Type: Article

References (151)

1. M. Peng, D. Liang, Y. Wei, J. Li, and H. Chen, "Self-configuration and self-optimization in LTE-Advanced heterogeneous networks, " IEEE Commun. Mag., vol. 51, no. 5, pp. 36-45, May 2013.
2. M. Peng, Y. Liu, D. Wei, W. Wang, and H. Chen, "Hierarchical cooperative relay based heterogeneous networks, " IEEE Wireless Commun., vol. 18, no. 3, pp. 48-56, Jun. 2011.
3. M. Peng, H. Xiang, Y. Cheng, S. Yan, and H. V. Poor, "Inter-Tier interference suppression in heterogeneous cloud radio access networks, " IEEE Access, vol. 3, pp. 2441-2455, Dec. 2015.
4. H. Wang and Y. Zhao, "C-RAN bearer network solution, " ZTE Technologies, no. 6, Shenzhen, China, Nov. 2011.
5. G. Li et al., "Architecture of GPP based, scalable, large-scale CRAN BBU pool, " in Proc. IEEE Globecom Workshops (GC Wkshps), Anaheim, CA, USA, Dec. 2012, pp. 267-272.
6. B. Haberland et al., "Radio base stations in the cloud, " Bell Labs Tech. J., vol. 18, no. 1, pp. 129-152, 2013.
7. D. Sabella et al., "RAN as a service: Challenges of designing a flexible RAN architecture in a cloud-based heterogeneous mobile network, " in Proc. Future Netw. Summit, Jul. 2013, pp. 1-8.
8. NTT DoCoMo, "5G radio access: Requirements, concept and technologies, " Tech. Rep. V1, Japan, Jul. 2014.
9. Nokia Networks, "Liquid radio making radio networks active, adaptive and aware, " Tech. Rep. V1, Finland, 2014.
10. Ericsson AB, Huawei Technologies, NEC Corporation, Alcatel Lucent, and Nokia Siemens Networks, "Common public radio interface (CPRI); Interface specification, " CPRI specification v5.0, Sep. 2011.
11. V. Suryaprakash, P. Rost, and G. Fettweis, "Are heterogeneous cloudbased radio access networks cost effective?, " IEEE J. Sel. Areas Commun., vol. 33, no. 10, pp. 2239-2251, Oct. 2015.
12. O. Simeone, E. Erkip, and S. Shamai, "Full-duplex cloud radio access networks: An information-Theoretic viewpoint, " IEEE Wireless Commun. Lett., vol. 3, no. 4, pp. 413-416, Jun. 2014.
13. C. L. I et al., "Recent progress on C-RAN centralization and cloudification, " IEEE Access, vol. 2, pp. 1030-1039, Aug. 2014.
14. A. Checko et al., "Cloud RAN for mobile networks-A technology overview, " IEEE Commun. Surv. Tuts., vol. 17, no. 1, pp. 405-426, Mar. 2015.
15. J. Wu, Z. Zhang, Y. Hong, and Y. Wen, "Cloud radio access network (C-RAN): A primer, " IEEE Netw., vol. 29, no. 1, pp. 35-41, Jan. 2015.
16. M. Peng, C. Wang, V. Lau, and H. V. Poor, "Fronthaul-constrained cloud radio access networks: Insights and challenges, " IEEE Wireless Commun., vol. 22, no. 2, pp. 152-160, Apr. 2015.
17. S. Park, O. Simeone, O. Sahin, and S. S. 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, Oct. 2014.
18. H. Dahrouj, A. Douik, and O. Dhifallah, "Resource allocation in heterogeneous cloud radio access networks: Advances and challenges, " IEEE Wireless Commun., vol. 22, no. 3, pp. 66-73, Jul. 2015.
19. T. Pfeiffer, "Next generation mobile fronthaul and midhaul architectures, " J. Opt. Commun. Netw., vol. 7, no. 11, pp. 38-45, Nov. 2015.
20. N. Agata, A. Agata, and K. Nishimura, "A design algorithm for ring topology centralized-radio-Access-network, " in Proc. IEEE 17th Int. Conf. Opt. Netw. Des. Model. (ONDM), Brest, France, Apr. 2013, pp. 173-178.
21. P. Chanclou et al., "Optical fiber solution for mobile fronthaul to achieve cloud radio access network, " in Proc. Future Netw. Mobile Summit, Lisboa, Portugal, Jul. 2013, pp. 1-11.
22. K. Ramantas, K. Vlachos, G. Ellinas, and A. Hadjiantonis, "A converged optical wireless architecture for mobile backhaul networks, " Proc. IEEE 17th Int. Conf. Opt. Netw. Des. Model. (ONDM), Apr. 2013, Brest, France, pp. 155-160.
23. ITU-T Study Group 15, "40-gigabit-capable passive optical networks 2 (NG-PON2): Physical media dependent (PMD) layer specification, " ITU-T Recommendation G.989.2 Dec. 2014, http://www.itu.int/ITU-T/recommendations/rec.aspx?rec=12097AU.
24. K. Sundaresan et al., "FluidNet: A flexible cloud-based radio access network for small cells, " IEEE/ACM Trans. Netw., Apr. 2015, doi: 10.1109/TNET.2015.2419979, submitted for publication.
25. M. Arslan, K. Sundaresan, and S. Rangarajan, "Software-defined networking in cellular radio access networks: Potential and challenges, " IEEE Commun. Mag., vol. 53, no. 1, pp. 150-156, Jan. 2015.
26. Y. D. Beyene, R. Jantti, and K. Ruttik, "Cloud-RAN architecture for indoor DAS, " IEEE Access, vol. 2, pp. 1205-1212, Oct. 2014.
27. S. Park, C. Chae, and S. Bahk, "Large-scale antenna operation in heterogeneous cloud radio access networks: A partial centralization approach, " IEEE Wireless Commun., vol. 22, no. 3, pp. 32-40, Jul. 2015.
28. K. Meerja, A. Shami, and A. Refaey, "Hailing cloud empowered radio access networks, " IEEE Wireless Commun., vol. 22, no. 1, pp. 122-129, Mar. 2015.
29. M. Peng, Y. Li, J. Jiang, J. Li, and C. Wang, "Heterogeneous cloud radio access networks: A new perspective for enhancing spectral and energy efficiencies, " IEEE Wireless Commun., vol. 21, no. 6, pp. 126-135, Dec. 2014.
30. M. Peng, Y. Li, Z. Zhao, and C. Wang, "System architecture and key technologies for 5G heterogeneous cloud radio access networks, " IEEE Netw., vol. 29, no. 2, pp. 6-14, Mar. 2015.
31. M. Peng, S. Yan, K. Zhang, and C. Wang. Fog Computing Based Radio Access Networks: Issues and Challenges, 2015, submitted for publication [Online]. Available: http://arxiv.org/abs/1506.04233.
32. J. G. Andrews et al., "What will 5G be?, " IEEE J. Sel. Areas Commun., vol. 32, no. 6, pp. 1065-1082, Jul. 2014.
33. Nokia Networks, "Network architecture for the 5G era, " Tech. Rep. V1, Finland, 2014.
34. M. Maier and B. P. Rimal, "The audacity of fiber-wireless (FiWi) networks: Revisited for clouds and cloudlets, " China Commun., vol. 12, no. 8, pp. 33-45, Aug. 2015.
35. Nokia Networks, "Intelligent base stations, " Tech. Rep. V1, Finland, 2014.
36. A. Dhaini, P. Ho, and G. Shen, "Toward green next-generation passive optical networks, " IEEE Commun. Mag., vol. 49, no. 11, pp. 94-101, Nov. 2011.
37. Integrated Device Technology, Inc., "Front-haul compression for emerging C-RAN and small cell networks, " Tech. Rep., CA, USA, Apr. 2013.
38. S. Park et al., "Robust and efficient distributed compression for cloud radio access networks, " IEEE Trans. Veh. Technol., vol. 62, no. 2, pp. 692-703, Feb. 2013.
39. S. Park, O. Simeone, O. Sahin, and S. Shamai, "Robust layered transmission and compression for distributed uplink reception in cloud radio access networks, " IEEE Trans. Veh. Technol., vol. 63, no. 1, pp. 204-226, Jan. 2014.
40. Y. 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, Jun. 2014.
41. X. Rao and V. K. N. Lau, "Distributed fronthaul compression and joint signal recovery in C-RAN, " IEEE Trans. Signal Process., vol. 63, no. 4, pp. 1056-1065, Dec. 2014.
42. S. Park et al., "Joint decompression and decoding for cloud radio access networks, " IEEE Signal Process. Lett., vol. 20, no. 5, pp. 503-506, May. 2013.
43. J. Kang, O. Simeone, J. Kang, and S. S. Shitz, "Joint signal and channel state information compression for the backhaul of uplink network MIMO systems, " IEEE Trans. Wireless Commun., vol. 13, no. 3, pp. 1555-1567, Jan. 2014.
44. H. S. Witsenhausen, "Indirect rate distortion problems, " IEEE Trans. Inf. Theory, vol. 26, no. 5, pp. 518-521, Sep. 1980.
45. J. Hoydis, M. Kobayashi, and M. Debbah, "Optimal channel training in uplink network MIMO systems, " IEEE Trans. Signal Process., vol. 59, no. 6, pp. 2824-2833, Jun. 2011.
46. L. Liu and R. Zhang, "Optimized uplink transmission in multi-Antenna C-RAN with spatial compression and forward, " IEEE Trans. Signal Process., vol. 63, no. 19, pp. 5083-5095, Oct. 2015.
47. S. Jeong, O. Simeone, M. H. Alexander, and J. Kang, "Optimal fronthaul quantization for cloud radio positioning, " IEEE Trans. Veh. Technol., May 2015, doi: 10.1109/TVT.2015.2431491, submitted for publication.
48. S. Park, O. Simeone, O. Sahin, and S. Shamai, "Multihop backhaul compression for the uplink of cloud radio access networks, " in Proc. IEEE Int. Symp. Inf. Theory (ISIT), Honolulu, HI, USA, Jun. 2014, pp. 2704-2708.
49. S. H. Park, O. Simeone, O. Sahin, and S. Shamai, "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.
50. S. Park, O. Simeone, O. Sahin, and S. Shamai, "Inter-cluster design of precoding and fronthaul compression for cloud radio access networks, " IEEE Wireless Commun. Lett., vol. 3, no. 4, pp. 369-372, Apr. 2014.
51. P. Patil and W. Yu, "Hybrid compression and message-sharing strategy for the downlink cloud radio-Access network, " in Proc. Inf. Theory Appl. Workshop (ITA), San Diego, CA, USA, Feb. 2014, pp. 1-6.
52. J. Kang, O. Simeone, J. Kang, and S. Shamai, "Fronthaul compression and precoding design for C-RANs over ergodic fading channels, " IEEE Trans. Veh. Technol., Aug. 2015, doi: 10.1109/TVT.2015.2466619, submitted for publication.
53. N. Jindal and A. Goldsmith, "Dirty-paper coding versus TDMA for MIMO broadcast channels, " IEEE Trans. Inf. Theory, vol. 51, no. 5, pp. 1783-1794, May 2005.
54. M. H. M. Costa, "Writing on dirty paper, " IEEE Trans. Inf. Theory, vol. 29, no. 3, pp. 439-441, May 1983.
55. K. K. Wang, R. D. Murch, and K. B. Letaief, "A joint-channel diagonalization for multiuser MIMO antenna systems, " IEEE Trans. Wireless Commun., vol. 2, no. 4, pp. 773-786, Jul. 2003.
56. Q. H. Spencer, A. L. Swindlehurst, and M. Haardt, "Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels, " IEEE Trans. Signal Process., vol. 52, no. 2, pp. 461-471, Feb. 2004.
57. S. Zukang et al., "Sum capacity of multiuser MIMO broadcast channels with block diagonalization, " IEEE Trans. Wireless Commun., vol. 6, no. 6, pp. 2040-2045, Jun. 2007.
58. H. Kaibin, J. G. Andrews, and R. W. Heath, "Performance of orthogonal beamforming for SDMA with limited feedback, " IEEE Trans. Veh. Technol., vol. 58, no. 1, pp. 152-164, Jan. 2009.
59. Y. Zeng, E. Gunawan, Y. Guan, and J. Liu, "Joint base station selection and linear precoding for cellular networks with multi-cell processing, " in Proc. TENCON, Fukuoka, Japan, Nov. 2010, pp. 1976-1981.
60. Y. Shi, J. 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.
61. J. Wu, "Green wireless communications: From concept to reality[Industry Perspectives], " IEEE Wireless Commun., vol. 19, no. 4, pp. 4-5, Aug. 2012.
62. C. R. Berger, Z. Wang, J. Huang, and S. Zhou, "Application of compressive sensing to sparse channel estimation, " IEEE Commun. Mag., vol. 48, no. 11, pp. 164-174, Nov. 2010.
63. D. L. Donoho, "Compressed sensing, " IEEE Trans. Inf. Theory, vol. 52, no. 4, pp. 1289-1306, Apr. 2006.
64. E. J. Candes and T. Tao, "Near-optimal signal recovery from random projections: Universal encoding strategies?, " IEEE Trans. Inf. Theory, vol. 52, no. 12, pp. 5406-5425, Dec. 2006.
65. M. Yuan and Y. Lin, "Model selection and estimation in regression with grouped variables, " J. R. Stat. Soc. B (Stat. Methodol.), vol. 68, no. 1, pp. 49-67, Feb. 2006.
66. S. N. Negahban and M. J. Wainwright, "Simultaneous support recovery in high dimensions: Benefits and perils of block l1/l∞-regularization, " IEEE Trans. Inf. Theory, vol. 57, no. 6, pp. 3841-3863, Jun. 2011.
67. J. Wang, M. Matthaiou, S. Jin, and X. Gao, "Precoder design for multiuser MISO systems exploiting statistical and outdated CSIT, " IEEE Trans. Commun., vol. 61, no. 11, pp. 4551-4564, Nov. 2013.
68. S. A. Jafar and A. Goldsmith, "Transmitter optimization and optimality of beamforming for multiple antenna systems, " IEEE Trans. Wireless Commun., vol. 3, no. 4, pp. 1165-1175, Jul. 2004.
69. X. Gao et al., "Statistical eigenmode transmission over jointly correlated MIMO channels, " IEEE Trans. Inf. Theory, vol. 55, no. 8, pp. 3735-3750, Aug. 2009.
70. J. Wang et al., "Statistical eigenmode-based SDMA for two-user downlink, " IEEE Trans. Signal Process., vol. 60, no. 10, pp. 5371-5383, Oct. 2012.
71. V. Raghavan, S. V. Hanly, and V. V. Veeravalli, "Statistical beamforming on the grassmann manifold for the two-user broadcast channel, " IEEE Trans. Inf. Theory, vol. 59, no. 10, pp. 6464-6489, Oct. 2013.
72. M. A. Maddah-Ali and D. Tse, "Completely stale transmitter channel state information is still very useful, " IEEE Trans. Inf. Theory, vol. 58, no. 7, pp. 4418-4431, Jul. 2012.
73. X. Yi and D. Gesbert, "Precoding methods for the MISO broadcast channel with delayed CSIT, " IEEE Trans. Wireless Commun., vol. 12, no. 5, pp. 1-11, May. 2013.
74. Y. Shi, J. Zhang, and K. B. Letaief, "CSI overhead reduction with stochastic beamforming for cloud radio access networks, " in Proc. Int. Conf. Commun. (ICC), Sydney, Australia, Jun. 2014, pp. 5154-5159.
75. Y. Shi, J. Zhang, and K. B. Letaief, "Optimal stochastic coordinated beamforming with compressive CSI acquisition for C-RAN, " IEEE Trans. Signal Process., vol. 63, no. 4, pp. 960-973, Apr. 2015.
76. N. Li et al., "Robust low-complexity MMSE precoding algorithm for cloud radio access networks, " IEEE Commun. Lett., vol. 18, no. 5, pp. 773-776, May 2014.
77. Y. Shi, J. Zhang, and K. B. Letaief, "Robust group sparse beamforming for multicast green Cloud-RAN with imperfect CSI, " IEEE Trans. Signal Process., vol. 63, no. 17, pp. 4647-4659, Sep. 2015.
78. B. Dai and W. Yu, "Sparse beamforming for limited-backhaul network MIMO system via reweighted power minimization, " in Proc. Globecom, Atlanta, GA, USA, Dec. 2013, pp. 1962-1967.
79. B. Dai andW. Yu, "Sparse beamforming design for networkMIMO system with per-base-station backhaul constraints, " in Proc. IEEE 15th Int. Workshop Signal Process. Adv. Wireless Commun. (SPAWC), Toronto, ON, Canada, Jun. 2014, pp. 294-298.
80. B. Dai and W. Yu, "Sparse beamforming and user-centric clustering for downlink cloud radio access network, " IEEE Access, vol. 2, pp. 1326-1339, Oct. 2014.
81. S. Boyd et al., "Distributed optimization and statistical learning via the alternating direction method of multipliers, " Found. Trends Mach. Learn., vol. 3, no. 1, pp. 1-122, 2011.
82. T. Kim, F. Sun, and A. J. Paulraj, "Low-complexity MMSE precoding for coordinated multipoint with per-Antenna power constraint, " IEEE Signal Process. Lett., vol. 20, no. 4, pp. 395-398, May 2013.
83. 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, Sep. 2011.
84. G. Wang et al., "Acquisition of channel state information in heterogeneous cloud radio access networks: Challenges and research directions, " IEEE Wireless Commun., vol. 22, no. 3, pp. 100-107, Jun. 2015.
85. M. Biguesh and A. Gershman, "Training-based MIMO channel estimation: A study of estimator tradeoffs and optimal training signals, " IEEE Trans. Signal Process., vol. 54, no. 3, pp. 884-893, Mar. 2006.
86. I. Barhumi, G. Leus, and M. Moonen, "Optimal training design for MIMO OFDM systems in mobile wireless channels, " IEEE Trans. Signal Process., vol. 51, no. 6, pp. 1615-1624, Jun. 2003.
87. J. K. Tugnait, "Blind estimation and equalization of MIMO channels via multidelay whitening, " IEEE J. Sel. Areas Commun., vol. 19, no. 8, pp. 1507-1519, Aug. 2001.
88. Z. Ding and H. V. Poor, "A general framework of precoding design for multiple two-way relaying communications, " IEEE Trans. Signal Process., vol. 61, no. 6, pp. 1531-1535, Mar. 2013.
89. J. Tugnait and W. Luo, "On channel estimation using superimposed training and first-order statistics, " IEEE Commun. Lett., vol. 7, no. 9, pp. 413-416, Sep. 2003.
90. X. Xie, M. Peng, F. Gao, and W. Wang, "Superimposed training based channel estimation for uplink multiple access relay networks, " IEEE Trans. Wireless Commun., vol. 14, no. 8, pp. 4439-4453, Aug. 2015.
91. T. Kong and Y. Hua, "Optimal design of source and relay pilots for MIMO relay channel estimation, " IEEE Trans. Signal Process., vol. 59, no. 9, pp. 4438-4446, Sep. 2011.
92. X. Xie, M. Peng, W. Wang, and H. V. Poor, "Training design and channel estimation in uplink cloud radio access networks, " IEEE Signal Process. Lett., vol. 22, no. 8, pp. 1060-1064, Aug. 2015.
93. N. Shariati, E. Bengtsson, and M. Debbah, "Low-complexity polynomial channel estimation in large-scale MIMO with arbitrary statistics, " IEEE J. Sel. Topics Signal Process., vol. 8, no. 5, pp. 815-830, Oct. 2014.
94. S. Zhou, B. Muquet, and G. Giannakis, "Subspace-based blind channel estimation for block precoded space-Time OFDM, " IEEE Trans. Signal Process., vol. 50, no. 5, pp. 1215-1228, May 2002.
95. S. Abdallah and I. Psaromiligkos, "Semi-blind channel estimation with superimposed training for OFDM-based AF two-way relaying, " IEEE Trans. Wireless Commun., vol. 13, no. 5, pp. 2468-2477, May 2014.
96. M. A. Marotta et al., "Resource sharing in heterogeneous cloud radio access networks, " IEEE Wireless Commun., vol. 22, no. 3, pp. 74-82, Jun. 2015.
97. Y. Shi et al., "Large-scale convex optimization for ultra-dense cloud-RAN, " IEEE Wireless Commun., vol. 22, no. 3, pp. 84-91, Jun. 2015.
98. H. Zhang, C. Jiang, and J. Cheng, "Cooperative interference mitigation and handover management for heterogeneous cloud small cell networks, " IEEE Trans. Wireless Commun., vol. 22, no. 3, pp. 92-99, Jun. 2015.
99. M. Gerasimenko et al., "Cooperative radio resource management in heterogeneous cloud radio access networks, " IEEE Access, vol. 3, no. 99, pp. 397-406, Apr. 2015.
100. X. Huang, G. Xue, R. Yu, and S. Leng, "Joint scheduling and beamforming coordination in cloud radio access networks with QoS guarantees, " IEEE Trans. Veh. Technol., Aug. 2015, doi: 10.1109/TVT.2015.2464278, submitted for publication.
101. 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. 14, no. 9, pp. 5068-5081, Sep. 2015.
102. M. Peng et al., "Energy-efficient resource assignment and power allocation in heterogeneous cloud radio access networks, " IEEE Trans. Veh. Technol., vol. 64, no. 11, pp. 5275-5287, Nov. 2015.
103. 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.
104. 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.
105. B. Fu, Y. Xiao, H. Deng, and H. Zeng, "A survey of cross-layer design in wireless networks, " IEEE Commun. Surv. Tuts., vol. 16, no. 1, pp. 110-126, 1st Quart. 2014.
106. M. Razaviyayn, H. Baligh, A. Callard, and Z. Q. Luo, "Joint user grouping and transceiver design in a MIMO interfering broadcast channel, " IEEE Trans. Signal Process., vol. 62, no. 1, pp. 85-94, Jan. 2014.
107. M. L. Ku, L. C. Wang, and Y. L. Liu, "Joint antenna beamforming, multiuser scheduling, and power allocation for hierarchical cellular systems, " IEEE J. Sel. Areas Commun., vol. 33, no. 5, pp. 896-909, May 2015.
108. H. Baligh et al., "Cross-layer provision of future cellular networks: A WMMSE-based approach, " IEEE Signal Process. Mag., vol. 31, no. 6, pp. 56-68, Nov. 2014.
109. C. Zarakovitis, Q. Ni, D. Skordoulis, and M. Hadjinicolaou, "Powerefficient cross-layer design for OFDMA systems with heterogeneous QoS, imperfect CSI, and outage considerations, " IEEE Trans. Veh. Technol., vol. 61, no. 2, pp. 781-798, Feb. 2012.
110. J. Tang and X. Zhang, "Cross-layer-model based adaptive resource allocation for statistical QoS guarantees in mobile wireless networks, " IEEE Trans. Wireless Commun., vol. 7, no. 6, pp. 2318-2328, Jun. 2008.
111. M. J. Neely, "Delay-based network utility maximization, " IEEE/ACM Trans. Netw., vol. 21, no. 1, pp. 41-54, Feb. 2013.
112. M. J. Neely, Stochastic Network Optimization With Application to Communication and Queueing Systems. San Rafael, CA, USA: Morgan & Claypool Publishers, 2010.
113. J. Chen and V. K. N. Lau, "Large deviation delay analysis of queueaware multi-user MIMO systems with two-Timescale mobile-driven feedback, " IEEE Trans. Signal Process., vol. 61, no. 16, pp. 4067-4076, Aug. 2013.
114. H. Ju, B. Liang, J. Li, and X. Yang, "Dynamic joint resource optimization for LTE-Advanced relay networks, " IEEE Trans. Wireless Commun., vol. 12, no. 11, pp. 5668-5678, Nov. 2013.
115. Y. Li et al., "Throughput-delay tradeoff in interference-free wireless networks with guaranteed energy efficiency, " IEEE Trans. Wireless. Commun., vol. 14, no. 13, pp. 1608-1621, Mar. 2015.
116. W. B. Powell, Approximate Dynamic Programming: Solving the Curses of Dimensionality. Hoboken, NJ, USA: Wiley, 2007.
117. J. Li et al., "Resource allocation optimization for delay-sensitive traffic in fronthaul constrained cloud radio access networks, " IEEE Syst. J., Nov. 2014, doi: 10.1109/JSYST.2014.2364252, submitted for publication.
118. V. K. N. Lau and F. Zhang, "Low complexity delay-constrained beamforming for multi-user MIMO systems with imperfect CSIT, " IEEE Trans. Signal Process., vol. 61, no. 16, pp. 4090-4099, Aug. 2013.
119. F. Zhang and V. K. N. Lau, "Closed-form delay-optimal power control for energy harvesting wireless system with finite energy storage, " IEEE Trans. Signal Process., vol. 62, no. 21, pp. 5706-5715, Nov. 2014.
120. Y. Cui et al., "A survey on delay-Aware resource control for wireless systems-Large deviation theory, stochastic Lyapunov drift, and distributed stochastic learning, " IEEE Trans. Inf. Theory, vol. 58, no. 3, pp. 1677-1701, Mar. 2012.
121. K. Akkarajitsakul, E. Hossain, D. Niyato, and I. K. Dong, "Game theoretic approaches for multiple access in wireless networks: A survey, " IEEE Commun. Surv. Tuts., vol. 13, no. 3, pp. 372-395, May/Jun. 2011.
122. W. Saad, Z. Han, M. Debbah, and A. Hjorungnes, "A distributed coalition formation framework for fair user cooperation in wireless networks, " IEEE Trans. Wireless Commun., vol. 8, no. 9, pp. 4580-4593, Sep. 2009.
123. F. Pantisano et al., "Interference alignment for cooperative femtocell networks: A game-Theoretic approach, " IEEE Trans. Mobile Comput., vol. 12, no. 11, pp. 2233-2246, Sep. 2012.
124. S. Guruacharya, D. Niyato, M. Bennis, and D. Kim, "Dynamic coalition formation for network MIMO in small cell networks, " IEEE Trans. Wireless Commun., vol. 12, no. 10, pp. 5360-5372, Sep. 2013.
125. Z. Zhao et al., "Cluster formation in cloud radio access networks: Performance analysis and algorithms design, " in Proc. IEEE Int. Conf. Commun. (ICC), London, U.K., Jun. 2015, pp. 3903-3908.
126. L. Duan, L. Gao, and J. Huang, "Cooperative spectrum sharing: A contract-based approach, " IEEE Trans. Mobile Comput., vol. 13, no. 1, pp. 174-187, Jan. 2014.
127. L. Gao, X. Wang, Y. Xu, and Q. Zhang, "Spectrum trading in cognitive radio networks: A contract-Theoretic modeling approach, " IEEE J. Sel. Areas Commun., vol. 29, no. 4, pp. 843-855, Apr. 2011.
128. Z. Hasan and V. Bhargava, "Relay selection for OFDM wireless systems under asymmetric information: A contract-Theory based approach, " IEEE Trans. Wireless Commun., vol. 12, no. 8, pp. 3824-3837, Aug. 2013.
129. 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.
130. Y. Gu et al., "Matching theory for future wireless networks: Fundamentals and applications, " IEEE Commun. Mag., vol. 53, no. 5, pp. 52-59, May 2015.
131. S. Bayat et al., "Distributed user association and femtocell allocation in heterogeneous wireless networks, " IEEE Trans. Commun., vol. 62, no. 8, pp. 3027-3043, Jul. 2014.
132. O. Semiari et al., "Matching theory for priority-based cell association in the downlink of wireless small cell networks, " in Proc. IEEE Int. Conf. Acoust. Speech and Signal Process. (ICASSP), Florence, Italy, May 2014, pp. 444-448.
133. W. Saad et al., "A college admissions game for uplink user association in wireless small cell networks, " in Proc. INFOCOM, Toronto, ON, Canada, Apr. 2014, pp. 1096-1104.
134. M. Kryder and C. S. Kim, "After hard drives-What comes next?, " IEEE Trans. Magn., vol. 45, no. 10, pp. 3406-3413, Oct. 2009.
135. H. Ahlehagh and S. Dey, "Video-Aware scheduling and caching in the radio access network, " IEEE/ACM Trans. Netw., vol. 22, no. 5, pp. 1444-1462, Jan. 2014.
136. F. Pantisano, M. Bennis, W. Saad, and M. Debbah, "Cache-Aware user association in backhaul-constrained small cell networks, " in Proc. 12th Int. symp. Model. Optim. Mobile Ad Hoc Wireless Netw. (WiOpt), Hammamet, Tunisia, May 2014, pp. 37-42.
137. F. Pantisano, M. Bennis, W. Saad, and M. Debbah, "Match to cache: Joint user association and backhaul allocation in cache-Aware small cell networks, " in Proc. Int. Conf. Commun. (ICC), London, U.K., Jun. 2015, pp. 3082-3087.
138. A. Imran and A. Zoha, "Challenges in 5G: How to empower SON with big data for enabling 5G, " IEEE Netw., vol. 28, no. 6, pp. 27-33, Nov. 2014.
139. X. Wu, X. Zhu, G. Wu, and W. Ding, "Data mining with big data, " IEEE/ACM Trans. Knowl. Data Eng., vol. 26, no. 1, pp. 97-107, Jun. 2013.
140. Y. Li et al., "Social-Aware D2D communications: Qualitative insights and quantitative analysis, " IEEE Commun. Mag., vol. 52, no. 6, pp. 150-158, Jun. 2014.
141. X. Chen, B. Proulx, X. Gong, and J. Zhang, "Exploiting social ties for cooperative D2D communications: A mobile social networking case, " IEEE/ACM Trans. Netw., vol. 23, no. 5, pp. 1471-1484, Oct. 2015.
142. F. Wang, Y. Li, Z. Wang, and Z. Yang, "Social community aware resource allocation for D2D communications underlaying cellular networks, " IEEE Trans. Veh. Technol., Jun. 2015, doi: 10.1109/TVT.2015.2450774, submitted for publication.
143. M. N. Tehrani, M. Uysal, and H. Yanikomeroglu, "Device-To-device communication in 5G cellular networks: Challenges, solutions, and future directions, " IEEE Commun. Mag., vol. 52, no. 5, pp. 86-92, May 2014.
144. I. F. Akyildiz et al., "A survey on spectrum management in cognitive radio networks, " IEEE Commun. Mag., vol. 46, no. 4, pp. 40-48, Apr. 2008.
145. S. Sun, Y. Ju, and Y. Yamao, "Overlay cognitive radio OFDM system for 4G cellular networks, " IEEE Wireless Commun., vol. 20, no. 2, pp. 68-73, Apr. 2013.
146. A. Ghasemi and E. S. Sousa, "Spectrum sensing in cognitive radio networks: Requirements, challenges and design trade-offs, " IEEE Commun. Mag., vol. 46, no. 4, pp. 32-39, Apr. 2008.
147. H. Su and X. Zhang, "Energy-efficient spectrum sensing for cognitive radio networks, " in Proc. Int. Conf. Commun. (ICC), Cape Town, South Africa, May 2010, pp. 1-5.
148. M. Jammal et al., "Software defined networking: State of the art and research challenges, " Comput. Netw., vol. 72, pp. 74-98, Oct. 2014.
149. F. Oggier and B. Hassibi, "The secrecy capacity of the MIMO wiretap channel, " IEEE Trans. Inf. Theory, vol. 57, no. 8, pp. 4961-4972, Oct. 2007.
150. Y. Zou et al., "Securing physical-layer communications for cognitive radio networks, " IEEE Commun. Mag., vol. 53, no. 9, pp. 48-54, Sep. 2015.
151. Y. Zou, B. Champagne, W. Zhu, and L. Hanzo, "Relay-selection improves the security-reliability trade-off in cognitive radio systems, " IEEE Trans. Commun., vol. 63, no. 1, pp. 215-228, Jan. 2015.