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: "a versatile dependent model for heterogeneous cellular networks"
  Abstract: We propose a new model for heterogeneous cellular networks that incorporates dependencies between the layers. In particular, it places lower-tier base stations at locations that are poorly covered by the macrocells, and it includes a small-cell model for the case where the goal is to enhance network capacity.

Connected through hyperedge HE-1 (induced by source paper "analyzing dependent placements of small cells in a two layer heterogeneous network with a rate coverage constraint"):
  with members:
    - "analyzing the impact of access point density on the performance of finite area networks"
    - "stochastic geometry modeling of cellular networks analysis simulation and experimental validation"
    - "downlink mimo hetnets modeling ordering results and performance analysis"
    - "equivalence and comparison of heterogeneous cellular networks"
    - "average rate of downlink heterogeneous cellular networks over generalized fading channels a stochastic geometry approach"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"
    - "modeling and analysis of k tier downlink heterogeneous cellular networks"
    - "a tractable approach to coverage and rate in cellular networks"

Connected through hyperedge HE-2 (induced by source paper "on modeling heterogeneous wireless networks using non poisson point processes"):
  with members:
    - "cooperative relaying under spatially and temporally correlated interference"
    - "managing interference correlation through random medium access"
    - "statistical modeling and probabilistic analysis of cellular networks with determinantal point processes"
    - "the ginibre point process as a model for wireless networks with repulsion"
    - "modeling and analysis of k tier downlink heterogeneous cellular networks"
    - "diversity loss due to interference correlation"
    - "spatial and temporal correlation of the interference in aloha ad hoc networks"
    - "interference and outage in clustered wireless ad hoc networks"

Connected through hyperedge HE-3 (induced by source paper "coverage and throughput analysis with a non uniform small cell deployment"):
  with members:
    - "analytical evaluation of coverage oriented femtocell network deployment"
    - "offloading in heterogeneous networks modeling analysis and design insights"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"
    - "modeling and analysis of k tier downlink heterogeneous cellular networks"
    - "downlink capacity and base station density in cellular networks"
    - "a tractable approach to coverage and rate in cellular networks"
    - "analytical evaluation of fractional frequency reuse for ofdma cellular networks"
    - "coverage in multi antenna two tier networks"

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)