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: "fronthauling for 5g lte u ultra dense cloud small cell networks"
  Abstract: Ultra dense cloud small cell network (UDCSNet), which combines cloud computing and massive deployment of small cells, is a promising technology for the fifth-generation (5G) LTE-U mobile communications because it can accommodate the anticipated explosive growth of mobile users' data traffic. As a result, fronthauling becomes a challenging problem in 5G LTE-U UDCSNet. In this article, we present an overview of the challenges and requirements of the fronthaul technology in 5G \mbox{LTE-U} UDCSNets. We survey the advantages and challenges for various candidate fronthaul technologies such as optical fiber, millimeter-wave based unlicensed spectrum, Wi-Fi based unlicensed spectrum, sub 6GHz based licensed spectrum, and free-space optical based unlicensed spectrum.

Connected through hyperedge HE-1 (induced by source paper "joint fronthaul multicast and cooperative beamforming for cache enabled cloud based small cell networks an mds codes aided approach"):
  with members:
    - "joint long term cache allocation and short term content delivery in green cloud small cell networks"
    - "layered group sparse beamforming for cache enabled green wireless networks"
    - "fog aided wireless networks for content delivery fundamental latency tradeoffs"
    - "joint optimization of user association data delivery rate and precoding for cache enabled f rans"
    - "optimizing mds coded caching in wireless networks with device to device communication"
    - "coded multicast fronthauling and edge caching for multi connectivity transmission in fog radio access networks"
    - "delivery time minimization in edge caching synergistic benefits of subspace alignment and zero forcing"
    - "content centric sparse multicast beamforming for cache enabled cloud ran"

Connected through hyperedge HE-2 (induced by source paper "energy efficient optimization of wireless powered 5g full duplex cellular networks a mean field game approach"):
  with members:
    - "tradeoff between delay and physical layer security in wireless networks"
    - "distributed user association in energy harvesting small cell networks a probabilistic bandit model"
    - "ultra dense small cell networks turning density into energy efficiency"
    - "toward a tractable delay analysis in ultra dense networks"
    - "heterogeneous cellular networks with spatio temporal traffic delay analysis and scheduling"
    - "5g ultra dense cellular networks"
    - "energy harvesting small cell networks feasibility deployment and operation"
    - "mean field energy games in wireless networks"

Connected through hyperedge HE-3 (induced by source paper "cloud based queuing model for tactile internet in next generation of ran"):
  with members:
    - "resource management and admission control for tactile internet in next generation of ran"
    - "joint uplink and downlink resource configuration for ultra reliable and low latency communications"
    - "network slicing based 5g and future mobile networks mobility resource management and challenges"
    - "power domain non orthogonal multiple access noma in 5g systems potentials and challenges"
    - "realizing the tactile internet haptic communications over next generation 5g cellular networks"
    - "joint millimeter wave fronthaul and ofdma resource allocation in ultra dense cran"
    - "uplink transmission design with massive machine type devices in tactile internet"
    - "resource management in non orthogonal multiple access networks for 5g and beyond"

Connected through hyperedge HE-4 (induced by source paper "lens based millimeter wave reconfigurable antenna noma"):
  with members:
    - "a new reconfigurable antenna mimo architecture for mmwave communication"
    - "a machine learning approach for power allocation in hetnets considering qos"
    - "reconfigurable antenna multiple access for 5g mmwave systems"
    - "impact of beam misalignment on hybrid beamforming noma for mmwave communications"
    - "optimal user scheduling and power allocation for millimeter wave noma systems"
    - "noma principles and recent results"
    - "5g ultra dense cellular networks"
    - "spatially sparse precoding in millimeter wave mimo systems"

Connected through hyperedge HE-5 (induced by source paper "resource management and admission control for tactile internet in next generation of ran"):
  with members:
    - "improving network availability of ultra reliable and low latency communications with multi connectivity"
    - "joint uplink and downlink resource configuration for ultra reliable and low latency communications"
    - "network slicing based 5g and future mobile networks mobility resource management and challenges"
    - "realizing the tactile internet haptic communications over next generation 5g cellular networks"
    - "joint millimeter wave fronthaul and ofdma resource allocation in ultra dense cran"
    - "uplink transmission design with massive machine type devices in tactile internet"
    - "joint user association and resource allocation in virtualized wireless networks"
    - "system architecture and key technologies for 5g heterogeneous cloud radio access networks"

Connected through hyperedge HE-6 (induced by source paper "iot platforms for 5g network and practical considerations a survey"):
  with members:
    - "fog computing based radio access networks issues and challenges"
    - "collaborative mobile edge computing in 5g networks new paradigms scenarios and challenges"
    - "network function virtualization state of the art and research challenges"
    - "fog computing focusing on mobile users at the edge"
    - "an internet of things framework for smart energy in buildings designs prototype and experiments"
    - "a survey on internet of things from industrial market perspective"
    - "five disruptive technology directions for 5g"

Connected through hyperedge HE-7 (induced by source paper "joint precoding and power control in small cell networks with proportional rate miso bc backhaul"):
  with members:
    - "secure distributed on device learning networks with byzantine adversaries"
    - "robust energy efficient beamforming in misome swipt systems with proportional secrecy rate"
    - "cache enabled physical layer security for video streaming in backhaul limited cellular networks"
    - "fronthaul aware group sparse precoding and signal splitting in swipt c ran"
    - "interference alignment and soft space reuse based cooperative transmission for multi cell massive mimo networks"
    - "downlink energy efficiency of power allocation and wireless backhaul bandwidth allocation in heterogeneous small cell networks"
    - "heterogeneous cellular networks using wireless backhaul fast admission control and large system analysis"

Connected through hyperedge HE-8 (induced by source paper "hybrid beamforming noma for mmwave communications"):
  with members:
    - "a new reconfigurable antenna mimo architecture for mmwave communication"
    - "multi beam noma for hybrid mmwave systems"
    - "reconfigurable antenna multiple access for 5g mmwave systems"
    - "non orthogonal multiple access based on hybrid beamforming for mmwave systems"
    - "non orthogonal multiple access common myths and critical questions"
    - "exploiting multiple antenna techniques for non orthogonal multiple access"
    - "modeling and analyzing millimeter wave cellular systems"
    - "energy efficient power allocation in millimeter wave massive mimo with non orthogonal multiple access"

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)