human: Given a node-centered hypergraph: <hypergraph>, where nodes represent papers and hyperedges represent sets of papers co-cited by a source paper.

Details of the hypergraph:
Center node: "software defined and virtualized future mobile and wireless networks a survey"
  Abstract: With the proliferation of mobile demands and increasingly multifarious services and applications, mobile Internet has been an irreversible trend. Unfortunately, the current mobile and wireless network (MWN) faces a series of pressing challenges caused by the inherent design. In this paper, we extend two latest and promising innovations of Internet, software-defined networking and network virtualization, to mobile and wireless scenarios. We first describe the challenges and expectations of MWN, and analyze the opportunities provided by the software-defined wireless network (SDWN) and wireless network virtualization (WNV). Then, this paper focuses on SDWN and WNV by presenting the main ideas, advantages, ongoing researches and key technologies, and open issues respectively. Moreover, we interpret that these two technologies highly complement each other, and further investigate efficient joint design between them. This paper confirms that SDWN and WNV may efficiently address the crucial challenges of MWN and significantly benefit the future mobile and wireless network.

Connected through hyperedge HE-1 (induced by source paper "fronthaul aware software defined wireless networks resource allocation and user scheduling"):
  with members:
    - "fronthaul aware software defined joint resource allocation and user scheduling for 5g networks"
    - "programming flows in dense mobile environments a multi user diversity perspective"
    - "fronthaul constrained cloud radio access networks insights and challenges"
    - "a lyapunov optimization approach to repeated stochastic games"
    - "backhaul aware interference management in the uplink of wireless small cell networks"

Connected through hyperedge HE-2 (induced by source paper "downlink user association and uplink scheduling for energy harvesting users in software defined mobile networks"):
  with members:
    - "user association in massive mimo hetnets"
    - "energy efficient precoding design for swipt in mimo two way relay networks"
    - "greendelivery proactive content caching and push with energy harvesting based small cells"
    - "energy efficiency in massive mimo based 5g networks opportunities and challenges"

Connected through hyperedge HE-3 (induced by source paper "overview of millimeter wave communications for fifth generation 5g wireless networks with a focus on propagation models"):
  with members:
    - "indoor office wideband penetration loss measurements at 73 ghz"
    - "study on 3gpp rural macrocell path loss models for millimeter wave wireless communications"
    - "investigation and comparison of 3gpp and nyusim channel models for 5g wireless communications"
    - "millimeter wave small scale spatial statistics in an urban microcell scenario"
    - "a novel millimeter wave channel simulator and applications for 5g wireless communications"
    - "small scale local area and transitional millimeter wave propagation for 5g communications"
    - "5g 3gpp like channel models for outdoor urban microcellular and macrocellular environments"
    - "millimeter wave human blockage at 73 ghz with a simple double knife edge diffraction model and extension for directional antennas"

Connected through hyperedge HE-4 (induced by source paper "will sdn be part of 5g"):
  with members:
    - "5g fronthaul latency and jitter studies of cpri over ethernet"
    - "r fft function split at ifft fft in unified lte cran and cable access network"
    - "nfv and sdn key technology enablers for 5g networks"
    - "hardware accelerated sdr platform for adaptive air interfaces"
    - "srslte an open source platform for lte evolution and experimentation"
    - "software defined optical networks sdons a comprehensive survey"
    - "cross layer software defined 5g network"
    - "are heterogeneous cloud based radio access networks cost effective"

Connected through hyperedge HE-5 (induced by source paper "defining and surveying wireless link virtualization and wireless network virtualization"):
  with members:
    - "survey on network virtualization hypervisors for software defined networking"
    - "network function virtualization state of the art and research challenges"
    - "a prioritised traffic embedding mechanism enabling a public safety virtual operator"
    - "virtualization of 5g cellular networks as a hierarchical combinatorial auction"
    - "distributed virtual resource allocation in small cell networks with full duplex self backhauls and virtualization"
    - "abstraction representation theory for heterotic physical computing"
    - "software defined networking a comprehensive survey"
    - "when does a physical system compute"

Connected through hyperedge HE-6 (induced by source paper "software defined optical networks sdons a comprehensive survey"):
  with members:
    - "survey on network virtualization hypervisors for software defined networking"
    - "network function virtualization state of the art and research challenges"
    - "fronthaul constrained cloud radio access networks insights and challenges"
    - "system architecture and key technologies for 5g heterogeneous cloud radio access networks"
    - "renewable energy aware inter datacenter virtual machine migration over elastic optical networks"
    - "wireless sensor network virtualization early architecture and research perspectives"
    - "software defined networking a comprehensive survey"
    - "nfv state of the art challenges and implementation in next generation mobile networks vepc"

Connected through hyperedge HE-7 (induced by source paper "survey on network virtualization hypervisors for software defined networking"):
  with members:
    - "network function virtualization state of the art and research challenges"
    - "wireless sensor network virtualization a survey"
    - "nfv based gateways for virtualized wireless sensor networks a case study"
    - "software defined networking a comprehensive survey"
    - "nfv state of the art challenges and implementation in next generation mobile networks vepc"
    - "scalability and resilience of software defined networking an overview"
    - "software defined networking state of the art and research challenges"
    - "disco distributed multi domain sdn controllers"

Connected through hyperedge HE-8 (induced by source paper "efficient access of mobile flows to heterogeneous networks under flash crowds"):
  with members:
    - "software defined networking a comprehensive survey"

Question: Please tell me which class the center node belongs to. The 40 classes are: cs.NA(Numerical Analysis), cs.MM(Multimedia), cs.LO(Logic in Computer Science), cs.CY(Computers and Society), cs.CR(Cryptography and Security), cs.DC(Distributed, Parallel, and Cluster Computing), cs.HC(Human-Computer Interaction), cs.CE(Computational Engineering, Finance, and Science), cs.NI(Networking and Internet Architecture), cs.CC(Computational Complexity), cs.AI(Artificial Intelligence), cs.MA(Multiagent Systems), cs.GL(General Literature), cs.NE(Neural and Evolutionary Computing), cs.SC(Symbolic Computation), cs.AR(Hardware Architecture), cs.CV(Computer Vision and Pattern Recognition), cs.GR(Graphics), cs.ET(Emerging Technologies), cs.SY(Systems and Control), cs.CG(Computational Geometry), cs.OH(Other Computer Science), cs.PL(Programming Languages), cs.SE(Software Engineering), cs.LG(Machine Learning), cs.SD(Sound), cs.SI(Social and Information Networks), cs.RO(Robotics), cs.IT(Information Theory), cs.PF(Performance), cs.CL(Computation and Language), cs.IR(Information Retrieval), cs.MS(Mathematical Software), cs.FL(Formal Languages and Automata Theory), cs.DS(Data Structures and Algorithms), cs.OS(Operating Systems), cs.GT(Computer Science and Game Theory), cs.DB(Databases), cs.DL(Digital Libraries), cs.DM(Discrete Mathematics). Directly output the class name.

gpt: cs.NI(Networking and Internet Architecture)