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: "hybrid spectrum access for mmwave networks"
  Abstract: While spectrum at millimeter wave (mmWave) frequencies is less scarce than at traditional frequencies below 6 GHz, still it is not unlimited, in particular if we consider the requirements from other services using the same band and the need to license mmWave bands to multiple mobile operators. Therefore, an efficient spectrum access scheme is critical to harvest the maximum benefit from emerging mmWave technologies. In this paper, motivated by previous results where spectrum pooling was proved to be more feasible at high mmWave frequencies, we study the performance of a hybrid spectrum scheme where exclusive access is used at frequencies in the 20/30 GHz range while spectrum pooling/unlicensed spectrum is used at frequencies around 70 GHz. Our preliminary results show that hybrid spectrum access is a promising approach for mmWave networks, and motivate further studies to achieve a more complete understanding of both technical and non technical implications.

Connected through hyperedge HE-1 (induced by source paper "hybrid spectrum sharing in mmwave cellular networks"):
  with members:
    - "stochastic geometric coverage analysis in mmwave cellular networks with a realistic channel model"
    - "resource sharing in 5g mmwave cellular networks"
    - "downlink and uplink cell association with traditional macrocells and millimeter wave small cells"
    - "spectrum and infrastructure sharing in millimeter wave cellular networks an economic perspective"
    - "understanding noise and interference regimes in 5g millimeter wave cellular networks"
    - "spectrum sharing in mmwave cellular networks via cell association coordination and beamforming"
    - "gains of restricted secondary licensing in millimeter wave cellular systems"
    - "on the value of beamforming and coordination for spectrum sharing in mmwave cellular networks"

Connected through hyperedge HE-2 (induced by source paper "spectrum sharing in mmwave cellular networks via cell association coordination and beamforming"):
  with members:
    - "downlink and uplink cell association with traditional macrocells and millimeter wave small cells"
    - "on the accuracy of interference models in wireless communications"
    - "distributed association and relaying with fairness in millimeter wave networks"
    - "spectrum pooling in mmwave networks opportunities challenges and enablers"
    - "towards an appropriate receiver beamforming scheme for millimeter wave communication a power consumption based comparison"
    - "stochastic geometry modeling and analysis of multi tier millimeter wave cellular networks"
    - "limited feedback hybrid precoding for multi user millimeter wave systems"
    - "hybrid analog digital channel estimation and beamforming training throughput tradeoff"

Connected through hyperedge HE-3 (induced by source paper "coverage in heterogeneous downlink millimeter wave cellular networks"):
  with members:
    - "modeling and analyzing millimeter wave cellular systems"
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "downlink and uplink cell association with traditional macrocells and millimeter wave small cells"
    - "performance analysis of outdoor mmwave ad hoc networks"
    - "the intensity matching approach a tractable stochastic geometry approximation to system level analysis of cellular networks"
    - "performance impact of los and nlos transmissions in dense cellular networks"
    - "stochastic geometry modeling and analysis of multi tier millimeter wave cellular networks"
    - "millimeter wave cellular networks a mac layer perspective"

Connected through hyperedge HE-4 (induced by source paper "on the value of beamforming and coordination for spectrum sharing in mmwave cellular networks"):
  with members:
    - "on the accuracy of interference models in wireless communications"
    - "stochastic geometry modeling and analysis of multi tier millimeter wave cellular networks"
    - "limited feedback hybrid precoding for multi user millimeter wave systems"
    - "hybrid analog digital channel estimation and beamforming training throughput tradeoff"
    - "millimeter wave cellular networks a mac layer perspective"
    - "exploiting device to device communications in joint scheduling of access and backhaul for mmwave small cells"
    - "hybrid mimo architectures for millimeter wave communications phase shifters or switches"
    - "the transitional behavior of interference in millimeter wave networks and its impact on medium access control"

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)