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: "worst case user analysis in poisson voronoi cells"
  Abstract: In this letter, we focus on the performance of a worst-case mobile user (MU) in the downlink cellular network. We derive the coverage probability and the spectral efficiency of the worst-case MU using stochastic geometry. Through analytical and numerical results, we draw out interesting insights that the coverage probability and the spectral efficiency of the worst-case MU decrease down to 23% and 19% of those of a typical MU, respectively. By applying a coordinated scheduling (CS) scheme, we also investigate how much the performance of the worst-case MU is improved.

Connected through hyperedge HE-1 (induced by source paper "air to air communications beyond 5g a novel 3d comp transmission scheme"):
  with members:
    - "coordinated multi point transmission a poisson delaunay triangulation based approach"
    - "a tractable framework for coverage analysis of cellular connected uav networks"
    - "a vision of 6g wireless systems applications trends technologies and open research problems"
    - "cellular connectivity for uavs network modeling performance analysis and design guidelines"
    - "beyond 5g with uavs foundations of a 3d wireless cellular network"
    - "supporting uav cellular communications through massive mimo"
    - "unified analytical volume distribution of poisson delaunay simplex and its application to coordinated multi point transmission"
    - "a tutorial on uavs for wireless networks applications challenges and open problems"

Connected through hyperedge HE-2 (induced by source paper "unified analytical volume distribution of poisson delaunay simplex and its application to coordinated multi point transmission"):
  with members:
    - "downlink coordinated joint transmission for mutual information accumulation"
    - "optimal dynamic point selection for power minimization in multiuser downlink comp"
    - "random cell association and void probability in poisson distributed cellular networks"
    - "deploying dense networks for maximal energy efficiency small cells meet massive mimo"
    - "optimal cell load and throughput in green small cell networks with generalized cell association"
    - "spectral efficiency scaling laws in dense random wireless networks with multiple receive antennas"
    - "what will 5g be"
    - "a tractable approach to coverage and rate in cellular networks"

Connected through hyperedge HE-3 (induced by source paper "a tractable model for noncoherent joint transmission base station cooperation"):
  with members:
    - "a stochastic geometry framework for analyzing pairwise cooperative cellular networks"
    - "analysis of non coherent joint transmission cooperation in heterogeneous cellular networks"
    - "effect of spatial interference correlation on the performance of maximum ratio combining"
    - "cooperative relaying in a poisson field of interferers a diversity order analysis"
    - "offloading in heterogeneous networks modeling analysis and design insights"
    - "modeling heterogeneous network interference using poisson point processes"
    - "fundamental limits of cooperation"
    - "modeling and analysis of k tier downlink heterogeneous cellular networks"

Connected through hyperedge HE-4 (induced by source paper "the mean interference to signal ratio and its key role in cellular and amorphous networks"):
  with members:
    - "asymptotic deployment gain a simple approach to characterize the sinr distribution in general cellular networks"
    - "the ginibre point process as a model for wireless networks with repulsion"
    - "a stochastic geometry analysis of inter cell interference coordination and intra cell diversity"
    - "diversity polynomials for the analysis of temporal correlations in wireless networks"
    - "modeling and analysis of k tier downlink heterogeneous cellular 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.IT(Information Theory)