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: "performance impact of los and nlos transmissions in small cell networks"
  Abstract: In this paper, we introduce a sophisticated path loss model incorporating both line-of-sight (LoS) and non-line-of-sight (NLoS) transmissions to study their performance impact in small cell networks (SCNs). Analytical results are obtained on the coverage probability and the area spectral efficiency (ASE) for two user association strategies (UASs) assuming both a general path loss model and two special cases of path loss models recommended by the 3GPP standards. The performance impact of LoS and NLoS transmissions in SCNs in terms of the coverage probability and the ASE is shown to be significant both quantitatively and qualitatively, compared with previous work that does not differentiate LoS and NLoS transmissions. Particularly, our analysis demonstrates when the density of small cells is larger than a threshold, the network coverage probability will decrease as small cells become denser, which in turn makes the ASE suffer from a slow growth or even a notable decrease. For practical regime of small cell density, the performance results derived from our analysis are distinctively different from previous results, and show that small cell density matters. Therefore, our results shed new insights on the design and deployment of future SCNs.

Connected through hyperedge HE-1 (induced by source paper "coverage in downlink heterogeneous mmwave cellular networks with user centric small cell deployment"):
  with members:
    - "3gpp inspired hetnet model using poisson cluster process sum product functionals and downlink coverage"
    - "modeling and analyzing millimeter wave cellular systems"
    - "coverage analysis for millimeter wave networks the impact of directional antenna arrays"
    - "on the energy efficient deployment for ultra dense heterogeneous networks with nlos and los transmissions"
    - "stochastic geometric coverage analysis in mmwave cellular networks with a realistic channel model"
    - "poisson cluster process bridging the gap between ppp and 3gpp hetnet models"
    - "dense small cell networks from noise limited to dense interference limited"
    - "enriched k tier hetnet model to enable the analysis of user centric small cell deployments"

Connected through hyperedge HE-2 (induced by source paper "analysis of device to device communications in uplink cellular networks with lognormal fading"):
  with members:
    - "ultra dense networks is there a limit to spatial spectrum reuse"
    - "towards 1 gbps ue in cellular systems understanding ultra dense small cell deployments"
    - "d2d enhanced heterogeneous cellular networks with dynamic tdd"
    - "an analytical framework for device to device communication in cellular networks"
    - "power control for d2d underlaid cellular networks modeling algorithms and analysis"
    - "analytical modeling of uplink cellular networks"
    - "a tractable approach to coverage and rate in cellular networks"

Connected through hyperedge HE-3 (induced by source paper "the intensity matching approach a tractable stochastic geometry approximation to system level analysis of cellular networks"):
  with members:
    - "performance impact of los and nlos transmissions in dense cellular networks"
    - "stochastic geometry modeling and analysis of multi tier millimeter wave cellular networks"
    - "effect of los nlos propagation on ultra dense networks"
    - "stochastic geometry modeling of cellular networks analysis simulation and experimental validation"
    - "downlink cellular network analysis with multi slope path loss models"
    - "on the joint impact of beamwidth and orientation error on throughput in directional wireless poisson networks"
    - "on association cells in random heterogeneous networks"
    - "analysis of blockage effects on urban cellular networks"

Connected through hyperedge HE-4 (induced by source paper "towards 1 gbps ue in cellular systems understanding ultra dense small cell deployments"):
  with members:
    - "study on scheduling techniques for ultra dense small cell networks"
    - "algorithms for enhanced inter cell interference coordination eicic in lte hetnets"
    - "capacity analysis of lte advanced hetnets with reduced power subframes and range expansion"
    - "massive mimo for next generation wireless systems"
    - "will the area spectral efficiency monotonically grow as small cells go dense"
    - "on the impact of hardware impairments on massive mimo"
    - "scaling up mimo opportunities and challenges with very large arrays"
    - "effects of channel aging in massive mimo systems"

Connected through hyperedge HE-5 (induced by source paper "impact of dual slope path loss on user association in hetnets"):
  with members:
    - "why to decouple the uplink and downlink in cellular networks and how to do it"
    - "analysis of the decoupled access for downlink and uplink in wireless heterogeneous networks"
    - "effect of los nlos propagation on area spectral efficiency and energy efficiency of small cells"
    - "downlink cellular network analysis with multi slope path loss models"
    - "an overview of load balancing in hetnets old myths and open problems"
    - "joint rate and sinr coverage analysis for decoupled uplink downlink biased cell associations in hetnets"
    - "coverage and rate analysis for millimeter wave cellular networks"
    - "millimeter wave cellular wireless networks potentials and challenges"

Connected through hyperedge HE-6 (induced by source paper "stochastic geometry modeling of cellular networks analysis simulation and experimental validation"):
  with members:
    - "stochastic geometry modeling and analysis of multi tier millimeter wave cellular networks"
    - "on modeling heterogeneous wireless networks using non poisson point processes"
    - "analysis of blockage effects on urban cellular networks"
    - "average rate of downlink heterogeneous cellular networks over generalized fading channels a stochastic geometry approach"
    - "a tractable approach to coverage and rate in 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)