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: "the urge to merge when cellular service providers pool capacity"
  Abstract: As cellular networks are turning into a platform for ubiquitous data access, cellular operators are facing a severe data capacity crisis due to the exponential growth of traffic generated by mobile users. In this work, we investigate the benefits of sharing infrastructure and spectrum among two cellular operators. Specifically, we provide a multi-cell analytical model using stochastic geometry to identify the performance gain under different sharing strategies, which gives tractable and accurate results. To validate the performance using a realistic setting, we conduct extensive simulations for a multi-cell OFDMA system using real base station locations. Both analytical and simulation results show that even a simple cooperation strategy between two similar operators, where they share spectrum and base stations, roughly quadruples capacity as compared to the capacity of a single operator. This is equivalent to doubling the capacity per customer, providing a strong incentive for operators to cooperate, if not actually merge.

Connected through hyperedge HE-1 (induced by source paper "radio access network and spectrum sharing in mobile networks a stochastic geometry perspective"):
  with members:
    - "a primer on cellular network analysis using stochastic geometry"
    - "resource sharing in 5g mmwave cellular networks"
    - "on spectrum and infrastructure sharing in multi operator cellular networks"
    - "poisson hole process theory and applications to wireless networks"
    - "gains of restricted secondary licensing in millimeter wave cellular systems"
    - "co primary multi operator resource sharing for small cell networks"
    - "technical rate of substitution of spectrum in future mobile broadband provisioning"
    - "on the feasibility of sharing spectrum licenses in mmwave cellular systems"

Connected through hyperedge HE-2 (induced by source paper "spectrum and infrastructure sharing in millimeter wave cellular networks an economic perspective"):
  with members:
    - "the potential of resource sharing in 5g millimeter wave bands"
    - "resource sharing in 5g mmwave cellular networks"
    - "spectrum pooling in mmwave networks opportunities challenges and enablers"
    - "a sharing and competition aware framework for cellular network evolution planning"
    - "on the feasibility of sharing spectrum licenses in mmwave cellular systems"
    - "coverage and rate analysis for millimeter wave cellular networks"
    - "millimeter wave channel modeling and cellular capacity evaluation"
    - "on the role of infrastructure sharing for mobile network operators in emerging markets"

Connected through hyperedge HE-3 (induced by source paper "a truthful auction based incentive framework for femtocell access"):
  with members:
    - "mechanisms for multi unit auctions"
    - "femtocell networks a 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)