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: "tradeoff between delay and physical layer security in wireless networks"
  Abstract: Exchange of crucial and confidential information leads to the unprecedented attention on the security problem in wireless networks. Though the security has been studied in a number of works, the joint optimization of the physical layer security and the end-to-end delay management, which requires a meticulous cross-layer design, has seldom been evaluated. In this work, by combining the tools from stochastic geometry and queueing theory, we analyze the tradeoff between the delay and the security performance in large wireless networks. We further propose a simple transmission mechanism which splits a message into two packets and evaluate its effect on the mean delay and the secrecy outage probability. Our numerical results reveal that the security performance is better for larger path loss exponent when the density of legitimate nodes is large, and it is reverse when the density is small. Moreover, it is observed that by introducing the simple mechanism of message split, the security performance is greatly improved in the backlogged scenario and slightly improved in the dynamic scenario when the density of legitimate transmitters is large. In summary, this work provides an understanding and a rule-of-thumb for the practical design of wireless networks where both the delay and the security are key concerns.

Connected through hyperedge HE-1 (induced by source paper "spatio temporal modeling for massive and sporadic access"):
  with members:
    - "aggregation and resource scheduling in machine type communication networks a stochastic geometry approach"
    - "random access analysis for massive iot networks under a new spatio temporal model a stochastic geometry approach"
    - "spatiotemporal stochastic modeling of iot enabled cellular networks scalability and stability analysis"
    - "heterogeneous cellular networks with spatio temporal traffic delay analysis and scheduling"
    - "massive machine type communication with data aggregation and resource scheduling"
    - "massive machine type communications in 5g physical and mac layer solutions"
    - "user centric mobility management in ultra dense cellular networks under spatio temporal dynamics"
    - "spatial spectrum and energy efficiency of random cellular networks"

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:
    - "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"
    - "fronthauling for 5g lte u ultra dense cloud small cell 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 "secure communication in dynamic wireless ad hoc networks"):
  with members:
    - "k connectivity in random key graphs with unreliable links"
    - "directional cell search delay analysis for cellular networks with static users"
    - "toward a tractable delay analysis in ultra dense networks"
    - "connectivity in secure wireless sensor networks under transmission constraints"
    - "on topological properties of wireless sensor networks under the q composite key predistribution scheme with on off channels"
    - "physical layer security in cellular networks a stochastic geometry approach"
    - "on the throughput cost of physical layer security in decentralized wireless networks"
    - "information propagation speed in mobile and delay tolerant networks"

Connected through hyperedge HE-4 (induced by source paper "a new small world iot routing mechanism based on cayley graphs"):
  with members:
    - "ultra reliable low latency communications in autonomous vehicular networks"
    - "joint optimization of computation and communication power in multi user massive mimo systems"
    - "coverage and handoff analysis of 5g fractal small cell networks"
    - "cache aided non orthogonal multiple access"
    - "toward a tractable delay analysis in ultra dense networks"
    - "energy efficiency evaluation of cellular networks based on spatial distributions of traffic load and power consumption"
    - "capacity analysis of a multi cell multi antenna cooperative cellular network with co channel interference"
    - "throughput delay reliability tradeoff with arq in wireless ad hoc networks"

Connected through hyperedge HE-5 (induced by source paper "delay analysis in full duplex heterogeneous cellular networks"):
  with members:
    - "modeling and performance analysis of full duplex communications in cache enabled d2d networks"
    - "full duplex device to device collaboration for low latency wireless video distribution"
    - "hybrid duplex switching in heterogeneous networks"
    - "toward a tractable delay analysis in ultra dense networks"
    - "hybrid full half duplex system analysis in heterogeneous wireless networks"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"

Connected through hyperedge HE-6 (induced by source paper "effect of spatial and temporal traffic statistics on the performance of wireless networks"):
  with members:
    - "the meta distribution of the sir for cellular networks with power control"
    - "stable throughput and delay analysis of a random access network with queue aware transmission"
    - "random access analysis for massive iot networks under a new spatio temporal model a stochastic geometry approach"
    - "spatiotemporal stochastic modeling of iot enabled cellular networks scalability and stability analysis"
    - "poisson cluster process based analysis of hetnets with correlated user and base station locations"
    - "heterogeneous cellular networks with spatio temporal traffic delay analysis and scheduling"
    - "the learning and prediction of application level traffic data in cellular networks"
    - "user centric mobility management in ultra dense cellular networks under spatio temporal dynamics"

Connected through hyperedge HE-7 (induced by source paper "spatiotemporal model for uplink iot traffic scheduling random access paradox"):
  with members:
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "the meta distribution of the sir for cellular networks with power control"
    - "random access analysis for massive iot networks under a new spatio temporal model a stochastic geometry approach"
    - "spatiotemporal stochastic modeling of iot enabled cellular networks scalability and stability analysis"
    - "lte lte a random access for massive machine type communications in smart cities"
    - "on the evaluation of lte random access channel overload in a smart city scenario"
    - "toward a tractable delay analysis in ultra dense networks"
    - "analytical modeling of interference aware power control for the uplink of 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)