|  Kamiyama N, Mori T, Kawahara R, Harada S, Hasegawa H. ISP-Operated CDN. In Proc. IEEE INFOCOMWorkshops, April 2009, pp.1-6. Wang Z, Zhu W W, Chen M H, Sun L F, Yang S Q. CPCDN:Content delivery powered by context and user intelligence. IEEE Transactions on Multimedia, 2015, 17(1):92-103. Freedman M J, Freudenthal E, Maziéres D. Democratizing content publication with coral. In Proc. the 1st Conference on Symposium on Networked Systems Design and Implementation, March 2004, p.18. Pallis G, Vakali A. Insight and perspectives for content delivery networks. Communications of the ACM, 2006, 49(1):101-106. Torres R, Finamore A, Kim J R, Mellia M, Munafo M M, Rao S.Dissecting video server selection strategies in the YouTube CDN. In Proc. the 31st International Conference on Distributed Computing Systems, June 2011, pp.248-257. Poularakis K, Iosifidis G, Tassiulas L. Approximation algorithms for mobile data caching in small cell networks. IEEE Transactions on Communications, 2014, 62(10):3665-3677. Jaccard P. Etude Comparative de la Distribution Florale dans une Portion des Alpes et du Jura. Lausanne, 1901. (In French) Wang Y G, Lee K, Venkataraman B, Shamanna R L, Rhee I, Yang S.Advertising cached content items in the control plane:Necessity and feasibility. In Proc. the IEEE Conference on Computer Communications Workshops, March 2012, pp.286-291. Chen K T, Huang C Y, Huang P, Lei C L. Quantifying Skype user satisfaction. ACM SIGCOMM Computer Communication Review, 2006, 36(4):399-410. Krajsa O, Fojtova L. RTT measurement and its dependence on the real geographical distance. In Proc. the 34th International Conference on Telecommunications and Signal Processing, August 2011, pp.231-234. Poularakis K, Iosifidis G, Argyriou A, Tassiulas L. Video delivery over heterogeneous cellular networks:Optimizing cost and performance. In Proc. the IEEE Conference on Computer Communications, April 27-May 2, 2014, pp.1078-1086. Yang K, Shekhar A H, Oliver D, Shekhar S.Capacityconstrained Network-Voronoi Diagram. IEEE Transactions on Knowledge and Data Engineering, 2015, 27(11):2919-2932. Voronoi G. Nouvelles applications des paramétres continus à la théorie des formes quadratiques. Journal für die Reine und Angewandte Mathematik, 1907, 133:97-178. (In French) Forgy EW. Cluster analysis of multivariate data:Efficiency versus interpretability of classifications. Biometrics, 1965, 21(3):768-769. Goldenberg D K, Qiuy L, Xie H Y, Yang Y R, Zhang Y. Optimizing cost and performance for multihoming. ACM SIGCOMM Computer Communication Review, 2004, 34(4):79-92. Golrezaei N, Shanmugam K, Dimakis A G, Molisch A F, Caire G. FemtoCaching:Wireless video content delivery through distributed caching helpers. In Proc. IEEE INFOCOM, March 2012, pp.1107-1115. Cha M, Kwak H, Rodriguez P, Ahn Y Y, Moon S.Analyzing the video popularity characteristics of large-scale user generated content systems. IEEE/ACM Transactions on Networking, 2009, 17(5):1357-1370. Ma M, Wang Z, Su K, Sun L F. Understanding content placement strategies in smartrouter-based peer video CDN. In Proc. the 26th International Workshop on Network and Operating Systems Support for Digital Audio and Video, May 2016, Article No. 7. Chen L, Zhou Y P, Jing M, Ma R T B. Thunder crystal:A novel crowdsourcing-based content distribution platform. In Proc. the 25th ACM Workshop on Network and Operating Systems Support for Digital Audio and Video, March 2015, pp.43-48. Frank B, Poese I, Lin Y, Smaragdakis G, Feldmann A, Maggs B, Rake J, Uhlig S, Weber R. Pushing CDN-ISP collaboration to the limit. ACM SIGCOMM Computer Communication Review, 2013, 43(3):34-44. Qiu L L, Padmanabhan V N, Voelker G M. On the placement of web server replicas. In Proc. the 20th Annual Joint Conference of the IEEE Computer and Communications Societies, April 2001, pp.1587-1596. Chen Y, Qiu L L, Chen W Y, Nguyen L, Katz R H. Efficient and adaptive web replication using content clustering. IEEE Journal on Selected Areasin Communications, 2003, 21(6):979-994. Hu H, Wen Y G, Chua T S, Huang J, Zhu W W, Li X L. Joint content replication and request routing for social video distribution over cloud CDN:A community clustering method. IEEE Transactions on Circuits and Systems for Video Technology, 2016, 26(7):1320-1333. Park K, Pai V S.Scale and performance in the CoBlitz large-file distribution service. In Proc. the 3rd Conference on Networked Systems Design & Implementation, May 2006. Jiang W J, Ioannidis S, Massoulié L, Picconi F. Orchestrating massively distributed CDNs. In Proc. the 8th International Conference on Emerging Networking Experiments and Technologies, December 2012, pp.133-144. Hu W, Wang Z, Sun L F. Path-aware peer-assisted web content delivery against network failures. In Proc. the 23rd International Symposium on Quality of Service, June 2015, pp.79-80. Valancius V, Laoutaris N, Massoulié L, Diot C, Rodriguez P. Greening the Internet with nano data centers. In Proc. the 5th International Conference on Emerging Networking Experiments and Technologies, December 2009, pp.37-48. Wei T M, Chang L, Yu B Y, Pan J P. MPCS:A mobility/popularity-based caching strategy for information-centric networks. In Proc. the IEEE Global Communications Conference, December 2014, pp.4629-4634. Bulut E, Szymanski B K. WIFI access point deployment for efficient mobile data offloading. ACM SIGMOBILE Mobile Computing and Communications Review, 2013, 17(1):71-78. Shen S H, Akella A. An information-aware QoE-centric mobile video cache. In Proc. the 19th Annual International Conference on Mobile Computing & Networking, September 2013, pp.401-412. Li Z H, Wilson C, Xu T Y, Liu Y, Lu Z, Wang Y L. Offline downloading in China:A comparative study. In Proc. the ACM Conference on Internet Measurement Conference, October 2015, pp.473-486.