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: "downlink and uplink cell association with traditional macrocells and millimeter wave small cells"
  Abstract: Millimeter wave (mmWave) links will offer high capacity but are poor at penetrating into or diffracting around solid objects. Thus, we consider a hybrid cellular network with traditional sub-6 GHz macrocells coexisting with denser mmWave small cells, where a mobile user can connect to either opportunistically. We develop a general analytical model to characterize and derive the uplink and downlink cell association in the view of the signal-to-interference-and-noise-ratio and rate coverage probabilities in such a mixed deployment. We offer extensive validation of these analytical results (which rely on several simplifying assumptions) with simulation results. Using the analytical results, different decoupled uplink and downlink cell association strategies are investigated and their superiority is shown compared with the traditional coupled approach. Finally, small cell biasing in mmWave is studied, and we show that unprecedented biasing values are desirable due to the wide bandwidth.

Connected through hyperedge HE-1 (induced by source paper "intelligent uav base station selection in urban environments a supervised learning approach"):
  with members:
    - "performance analysis of mobile cellular connected drones under practical antenna configurations"
    - "cellular connectivity for uavs network modeling performance analysis and design guidelines"
    - "mobility in the sky performance and mobility analysis for cellular connected uavs"
    - "understanding uav cellular communications from existing networks to massive mimo"
    - "deep learning coordinated beamforming for highly mobile millimeter wave systems"
    - "the sky is not the limit lte for unmanned aerial vehicles"
    - "a tutorial on uavs for wireless networks applications challenges and open problems"
    - "backhaul for low altitude uavs in urban environments"

Connected through hyperedge HE-2 (induced by source paper "millimeter wave integrated access and backhaul in 5g performance analysis and design insights"):
  with members:
    - "integrated access and backhaul in 5g mmwave networks potentials and challenges"
    - "a tractable analysis of the blind spot probability in localization networks under correlated blocking"
    - "end to end simulation of integrated access and backhaul at mmwaves"
    - "max min rates in self backhauled millimeter wave cellular networks"
    - "distributed path selection strategies for integrated access and backhaul at mmwaves"
    - "modeling and analyzing millimeter wave cellular systems"
    - "integrated mmwave access and backhaul in 5g bandwidth partitioning and downlink analysis"
    - "capacity scaling of cellular networks impact of bandwidth infrastructure density and number of antennas"

Connected through hyperedge HE-3 (induced by source paper "sense and predict harnessing spatial interference correlation for cognitive radio networks"):
  with members:
    - "ultra reliable and low latency communications in 5g downlink physical layer aspects"
    - "millimeter wave interference avoidance via building aware associations"
    - "the connectivity of millimeter wave networks in urban environments modeled using random lattices"
    - "macro diversity in cellular networks with random blockages"
    - "sense and predict opportunistic mac based on spatial interference correlation for cognitive radio networks"
    - "spatio temporal interference correlation and joint coverage in cellular networks"
    - "design and analysis of initial access in millimeter wave cellular networks"
    - "cognitive random access for internet of things networks"

Connected through hyperedge HE-4 (induced by source paper "coverage analysis of integrated sub 6ghz mmwave cellular networks with hotspots"):
  with members:
    - "cache enabled hetnets with millimeter wave small cells"
    - "equi coverage contours in cellular networks"
    - "downlink coverage probability in cellular networks with poisson poisson cluster deployed base stations"
    - "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"
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "nearest neighbor and contact distance distributions for thomas cluster process"

Connected through hyperedge HE-5 (induced by source paper "dynamic model for network selection in next generation hetnets with memory affecting rational users"):
  with members:
    - "a learning based coexistence mechanism for laa lte based hetnets"
    - "energy minimization for wireless communication with rotary wing uav"
    - "blocking probability and spatial throughput characterization for cellular enabled uav network with directional antenna"
    - "green 5g heterogeneous networks through dynamic small cell operation"
    - "physical layer security in millimeter wave cellular networks"
    - "5g ultra dense cellular networks"
    - "tractable model for rate in self backhauled millimeter wave cellular networks"
    - "what will 5g be"

Connected through hyperedge HE-6 (induced by source paper "coverage analysis of relay assisted millimeter wave cellular networks with spatial correlation"):
  with members:
    - "improving the coverage and spectral efficiency of millimeter wave cellular networks using device to device relays"
    - "coverage analysis for millimeter wave networks the impact of directional antenna arrays"
    - "performance analysis of millimeter wave relaying impacts of beamwidth and self interference"
    - "performance analysis of outdoor mmwave ad hoc networks"
    - "coverage in heterogeneous downlink millimeter wave cellular networks"
    - "tractable model for rate in self backhauled millimeter wave cellular networks"
    - "coverage and rate analysis for millimeter wave cellular networks"
    - "millimeter wave cellular wireless networks potentials and challenges"

Connected through hyperedge HE-7 (induced by source paper "dual band fading multiple access relay channels"):
  with members:
    - "gaussian 1 2 1 networks capacity results for mmwave communications"
    - "secure communication over 1 2 1 networks"
    - "beam management for millimeter wave beamspace mu mimo systems"
    - "millimeter wave beam selection using out of band spatial information"
    - "link regime and power savings of decode forward relaying in fading channels"
    - "joint millimeter wave and microwave resources allocation in cellular networks with dual mode base stations"
    - "hybrid millimeter wave systems a novel paradigm for hetnets"

Connected through hyperedge HE-8 (induced by source paper "stochastic geometry analysis of hybrid aerial terrestrial networks with mmwave backhauling"):
  with members:
    - "uav aided offloading for cellular hotspot"
    - "a tutorial on uavs for wireless networks applications challenges and open problems"
    - "modeling and analyzing millimeter wave cellular systems"
    - "a stochastic geometry model of backhaul and user coverage in urban uav networks"
    - "a primer on cellular network analysis using stochastic geometry"
    - "energy efficient uav communication with trajectory optimization"
    - "enabling uav cellular with millimeter wave communication potentials and approaches"

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)