1. Herrera J G, Botero J F. Resource allocation in NFV: a comprehensive survey. IEEE Trans Netw Serv Manage, 2016, 13: 518–532
2. Cao J, Zhang Y, An W, et al. VNF-FG design and VNF placement for 5G mobile networks. Sci China Inf Sci, 2017, 60: 040302
3. Riera J F, Escalona E, Batalle J, et al. Virtual network function scheduling: concept and challenges. In: Proceedings of International Conference on Smart Communications in Network Technologies, Vilanova i la Geltru, 2014. 1–5
4. Mijumbi R, Serrat J, Gorricho J L, et al. Design and evaluation of algorithms for mapping and scheduling of virtual network functions. In: Proceedings of IEEE Conference on Network Softwarization, London, 2015. 1–9
5. AL-Dhahir N. Editorial a message from the new editor-in-chief. IEEE Trans Commun, 2016, 64: 1