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: "service function chaining resource allocation a survey"
  Abstract: Service Function Chaining (SFC) is a crucial technology for future Internet. It aims to overcome the limitation of current deployment models which is rigid and static. Application of this technology relies on algorithms that can optimally mapping SFC to substrate network. This category of algorithms is referred as "Service Function Chaining Resource Allocation (SFC-RA)" algorithms or "VNF placement (VNFP)" algorithms. This paper presents a survey of current researches in SFC-RA algorithms. After presenting the formulation and related problems, several variants of SFC-RA problem are summarized. At last, we discussed several future research directions.

Connected through hyperedge HE-1 (induced by source paper "a virtual network customization framework for multicast services in nfv enabled core networks"):
  with members:
    - "air ground integrated vehicular network slicing with content pushing and caching"
    - "service overlay forest embedding for software defined cloud networks"
    - "network slicing for service oriented networks under resource constraints"
    - "distributed service function chaining"
    - "vehicular communications a network layer perspective"
    - "scalable steiner tree for multicast communications in software defined networking"
    - "specifying and placing chains of virtual network functions"

Connected through hyperedge HE-2 (induced by source paper "robust online composition routing and nf placement for nfv enabled services"):
  with members:
    - "a virtual network customization framework for multicast services in nfv enabled core networks"
    - "near optimal online algorithms and fast approximation algorithms for resource allocation problems"
    - "distributed service function chaining"
    - "online admission control and embedding of service chains"
    - "scalable steiner tree for multicast communications in software defined networking"
    - "competitive and deterministic embeddings of virtual networks"

Connected through hyperedge HE-3 (induced by source paper "robust network function virtualization"):
  with members:
    - "integrated nfv sdn architectures a systematic literature review"
    - "a scalable approach for service chain mapping with multiple sc instances in a wide area network"
    - "shortest path and maximum flow problems under service function chaining constraints"
    - "an approximation algorithm for path computation and function placement in sdns"
    - "service chain and virtual network embeddings approximations using randomized rounding"
    - "network function virtualization state of the art and research challenges"
    - "fronthaul constrained cloud radio access networks insights and challenges"
    - "lp rounding algorithms for facility location problems"

Connected through hyperedge HE-4 (induced by source paper "dynamic cloud network control under reconfiguration delay and cost"):
  with members:
    - "optimal dynamic cloud network control"
    - "throughput optimal scheduling for multi hop networked transportation systems with switch over delay"
    - "optimal control of wireless computing networks"
    - "streaming big data meets backpressure in distributed network computation"
    - "power consumption of virtualization technologies an empirical investigation"
    - "adaptive policies for scheduling with reconfiguration delay an end to end solution for all optical data centers"

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)