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: "smart contract slas for dense small cell as a service"
  Abstract: The disruptive power of blockchain technologies represents a great opportunity to re-imagine standard practices of telecommunication networks and to identify critical areas that can benefit from brand new approaches. As a starting point for this debate, we look at the current limits of infrastructure sharing, and specifically at the Small-Cell-as-a-Service trend, asking ourselves how we could push it to its natural extreme: a scenario in which any individual home or business user can become a service provider for mobile network operators, freed from all the scalability and legal constraints that are inherent to the current modus operandi. We propose the adoption of smart contracts to implement simple but effective Service Level Agreements (SLAs) between small cell providers and mobile operators, and present an example contract template based on the Ethereum blockchain.

Connected through hyperedge HE-1 (induced by source paper "smart contract based secure spectrum sharing in multi operators wireless communication networks"):
  with members:
    - "traffic management for heterogeneous networks with opportunistic unlicensed spectrum sharing"
    - "spatial spectrum and energy efficiency of random cellular networks"
    - "user mobility evaluation for 5g small cell networks based on individual mobility model"
    - "energy efficiency evaluation of cellular networks based on spatial distributions of traffic load and power consumption"
    - "capacity analysis of a multi cell multi antenna cooperative cellular network with co channel interference"

Connected through hyperedge HE-2 (induced by source paper "on the ethereum blockchain structure a complex networks theory perspective"):
  with members:
    - "likestarter a smart contract based social dao for crowdfunding"
    - "towards blockchain enabled wireless mesh networks"
    - "a blockchain based flight data recorder for cloud accountability"
    - "towards blockchain based auditable storage and sharing of iot data"
    - "a blockchain based approach for data accountability and provenance tracking"
    - "highly intensive data dissemination in complex networks"
    - "simulation of the internet of things"

Connected through hyperedge HE-3 (induced by source paper "practical modeling and analysis of blockchain radio access network"):
  with members:
    - "a survey on consensus mechanisms and mining strategy management in blockchain networks"
    - "delay and communication tradeoffs for blockchain systems with lightweight iot clients"
    - "cloud fog computing resource management and pricing for blockchain networks"
    - "analysis of hashrate based double spending"

Connected through hyperedge HE-4 (induced by source paper "blockchain based smart contracts applications and challenges"):
  with members:
    - "a first look at identity management schemes on the blockchain"
    - "blockchain based smart contracts a systematic mapping study"
    - "secure and trustable electronic medical records sharing using blockchain"
    - "towards an ontology driven blockchain design for supply chain provenance"
    - "understanding modern banking ledgers through blockchain technologies future of transaction processing and smart contracts on the internet of money"

Connected through hyperedge HE-5 (induced by source paper "the use of smart contracts and challenges"):
  with members:
    - "a first look at identity management schemes on the blockchain"
    - "blockchain based proxy re encryption scheme for secure iot data sharing"
    - "blockchain based smart contracts a systematic mapping study"
    - "secure and trustable electronic medical records sharing using blockchain"
    - "towards an ontology driven blockchain design for supply chain provenance"

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)