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: "sinr and throughput scaling in ultradense urban cellular networks"
  Abstract: We consider a dense urban cellular network where the base stations (BSs) are stacked vertically as well as extending infinitely in the horizontal plane, resulting in a greater than two dimensional (2D) deployment. Using a dual-slope path loss model that is well supported empirically, we extend recent 2D coverage probability and potential throughput results to 3 dimensions. We prove that the "critical close-in path loss exponent" $\alpha_0$ where SINR eventually decays to zero is equal to the dimensionality $d$, i.e. $\alpha_0 \leq 3$ results in an eventual SINR of 0 in a 3D network. We also show that the potential (i.e. best case) aggregate throughput decays to zero for $\alpha_0 < d/2$. Both of these scaling results also hold for the more realistic case that we term ${3\rm{D}^{+}}$, where there are no BSs below the user, as in a dense urban network with the user on or near the ground.

Connected through hyperedge HE-1 (induced by source paper "sum rate maximization of multicell miso networks with limited information exchange"):
  with members:
    - "a deep learning framework for optimization of miso downlink beamforming"
    - "opportunistic downlink interference alignment for multi cell mimo networks"
    - "coordinated regularized zero forcing precoding for multicell miso systems with limited feedback"
    - "joint transmission with limited backhaul connectivity"
    - "analysis of massive mimo enabled downlink wireless backhauling for full duplex small cells"
    - "on the spatial degrees of freedom of multicell and multiuser mimo channels"
    - "on feasibility of interference alignment in mimo interference networks"
    - "downlink interference alignment"

Connected through hyperedge HE-2 (induced by source paper "coverage analysis of 3 d dense cellular networks with realistic propagation conditions"):
  with members:
    - "downlink cellular network analysis with los nlos propagation and elevated base stations"
    - "effect of los nlos propagation on area spectral efficiency and energy efficiency of small cells"
    - "what will 5g be"
    - "a stochastic geometry framework for los nlos propagation in dense small cell networks"
    - "coverage and economy of cellular networks with many base stations"
    - "a tractable approach to coverage and rate in cellular networks"

Connected through hyperedge HE-3 (induced by source paper "resource allocation and power control in cooperative small cell networks in frequency selective channels with backhaul constraint"):
  with members:
    - "backhaul aware user association and resource allocation for energy constrained hetnets"
    - "tier aware resource allocation in ofdma macrocell small cell networks"
    - "distributed pricing based user association for downlink heterogeneous cellular networks"
    - "optimal user cell association for massive mimo wireless networks"
    - "user association for load balancing in heterogeneous cellular networks"
    - "resource allocation for downlink cellular ofdma systems part ii practical algorithms and optimal reuse factor"
    - "resource allocation for downlink cellular ofdma systems part i optimal allocation"

Connected through hyperedge HE-4 (induced by source paper "effective capacity analysis in ultra dense wireless networks with random interference"):
  with members:
    - "effective capacity of licensed assisted access in unlicensed spectrum for 5g from theory to application"
    - "throughput and energy efficiency analysis of small cell networks with multi antenna base stations"
    - "downlink capacity and base station density in cellular networks"

Connected through hyperedge HE-5 (induced by source paper "stochastic geometry analysis of ultra dense networks impact of antenna height and performance limits"):
  with members:
    - "the major and minor factors in the performance analysis of ultra dense networks"
    - "on the performance of practical ultra dense networks the major and minor factors"
    - "performance impact of base station antenna heights in dense cellular networks"
    - "coverage and capacity scaling laws in downlink ultra dense cellular networks"
    - "please lower small cell antenna heights in 5g"
    - "performance impact of los and nlos transmissions in dense cellular networks"
    - "are we approaching the fundamental limits of wireless network densification"
    - "downlink cellular network analysis with multi slope path loss models"

Connected through hyperedge HE-6 (induced by source paper "miso in ultra dense networks balancing the tradeoff between user and system performance"):
  with members:
    - "the major and minor factors in the performance analysis of ultra dense networks"
    - "effect of densification on cellular network performance with bounded pathloss model"
    - "performance impact of base station antenna heights in dense cellular networks"
    - "fronthauling for 5g lte u ultra dense cloud small cell networks"
    - "performance impact of los and nlos transmissions in dense cellular networks"
    - "towards 1 gbps ue in cellular systems understanding ultra dense small cell deployments"
    - "downlink cellular network analysis with multi slope path loss models"
    - "a stochastic geometry framework for los nlos propagation in dense small cell networks"

Connected through hyperedge HE-7 (induced by source paper "the impact of antenna height difference on the performance of downlink cellular networks"):
  with members:
    - "effect of densification on cellular network performance with bounded pathloss model"
    - "performance impact of los and nlos transmissions in dense cellular networks"
    - "downlink cellular network analysis with multi slope path loss models"
    - "a stochastic geometry framework for los nlos propagation in dense small cell networks"
    - "modeling and analysis of k tier downlink heterogeneous cellular networks"
    - "a tractable approach to coverage and rate in cellular networks"

Connected through hyperedge HE-8 (induced by source paper "directional antennas for interference management in full duplex cellular networks"):
  with members:
    - "a primer on cellular network analysis using stochastic geometry"
    - "throughput and coverage for a mixed full and half duplex small cell network"
    - "uplink performance analysis of dense cellular networks with los and nlos transmissions"
    - "passive loop interference suppression in large scale full duplex cellular networks"
    - "full duplex radio for uplink downlink transmission with spatial randomness"
    - "full duplex mimo small cell networks performance analysis"
    - "throughput analysis for full duplex wireless networks with imperfect self interference cancellation"
    - "exploiting known interference as green signal power for downlink beamforming optimization"

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)