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: "handoff rate and coverage analysis in multi tier heterogeneous networks"
  Abstract: This paper analyzes the impact of user mobility in multi-tier heterogeneous networks. We begin by obtaining the handoff rate for a mobile user in an irregular cellular network with the access point locations modeled as a homogeneous Poisson point process. The received signal-to-interference-ratio (SIR) distribution along with a chosen SIR threshold is then used to obtain the probability of coverage. To capture potential connection failures due to mobility, we assume that a fraction of handoffs result in such failures. Considering a multi-tier network with orthogonal spectrum allocation among tiers and the maximum biased average received power as the tier association metric, we derive the probability of coverage for two cases: 1) the user is stationary (i.e., handoffs do not occur, or the system is not sensitive to handoffs); 2) the user is mobile, and the system is sensitive to handoffs. We derive the optimal bias factors to maximize the coverage. We show that when the user is mobile, and the network is sensitive to handoffs, both the optimum tier association and the probability of coverage depend on the user's speed; a speed-dependent bias factor can then adjust the tier association to effectively improve the coverage, and hence system performance, in a fully-loaded network.

Connected through hyperedge HE-1 (induced by source paper "stochastic geometry analysis of sojourn time in multi tier cellular networks"):
  with members:
    - "handover management in 5g and beyond a topology aware skipping approach"
    - "towards understanding the fundamentals of mobility in cellular networks"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"

Connected through hyperedge HE-2 (induced by source paper "mobility in the sky performance and mobility analysis for cellular connected uavs"):
  with members:
    - "capacity and coverage enhancement using long endurance tethered airborne base stations"
    - "trajectory design for cellular connected uav under outage duration constraint"
    - "interference management for cellular connected uavs a deep reinforcement learning approach"
    - "a vision of 6g wireless systems applications trends technologies and open research problems"
    - "cellular connectivity for uavs network modeling performance analysis and design guidelines"
    - "on the 3 d placement of airborne base stations using tethered uavs"
    - "trajectory optimization for cellular connected uav under outage duration constraint"
    - "drones in distress a game theoretic countermeasure for protecting uavs against gps spoofing"

Connected through hyperedge HE-3 (induced by source paper "coverage and handoff analysis of 5g fractal small cell networks"):
  with members:
    - "modeling and analyzing millimeter wave cellular systems"
    - "a novel millimeter wave channel simulator and applications for 5g wireless communications"
    - "vehicular communications for 5g cooperative small cell networks"
    - "analysis of human body blockage in urban millimeter wave cellular communications"
    - "a dual directional path loss model in 5g wireless fractal small cell networks"
    - "energy efficiency optimization of 5g radio frequency chain systems"
    - "wireless fractal cellular networks"
    - "fundamentals of the downlink green coverage and energy efficiency in heterogeneous networks"

Connected through hyperedge HE-4 (induced by source paper "mobility aware analysis of 5g and b5g cellular networks a tutorial"):
  with members:
    - "3gpp inspired hetnet model using poisson cluster process sum product functionals and downlink coverage"
    - "coverage and rate analysis for co existing rf vlc downlink cellular networks"
    - "handover management in 5g and beyond a topology aware skipping approach"
    - "analysis of massive mimo enabled downlink wireless backhauling for full duplex small cells"
    - "on feasibility of 5g grade dedicated rf charging technology for wireless powered wearables"
    - "evolution toward 5g multi tier cellular wireless networks an interference management perspective"
    - "a stochastic geometry analysis of inter cell interference coordination and intra cell diversity"
    - "towards understanding the fundamentals of mobility in cellular networks"

Connected through hyperedge HE-5 (induced by source paper "improved handover through dual connectivity in 5g mmwave mobile networks"):
  with members:
    - "adaptive beamwidth selection for contention based access periods in millimeter wave wlans"
    - "performance comparison of dual connectivity and hard handover for lte 5g tight integration"
    - "channel dynamics and snr tracking in millimeter wave cellular systems"
    - "transport layer performance in 5g mmwave cellular"
    - "a framework for end to end evaluation of 5g mmwave cellular networks in ns 3"
    - "multi connectivity in 5g mmwave cellular networks"
    - "uplink based framework for control plane applications in 5g mmwave cellular networks"
    - "comparative analysis of initial access techniques in 5g mmwave cellular networks"

Connected through hyperedge HE-6 (induced by source paper "spatio temporal interference correlation and joint coverage in cellular networks"):
  with members:
    - "effect of user mobility on the performance of device to device networks with distributed caching"
    - "handover management in dense cellular networks a stochastic geometry approach"
    - "temporal correlation of interference and outage in mobile networks with correlated mobility in finite regions"
    - "analysis of interference correlation in non poisson networks"
    - "cooperative relaying under spatially and temporally correlated interference"
    - "the meta distribution of the sir in poisson bipolar and cellular networks"
    - "managing interference correlation through random medium access"
    - "effect of spatial interference correlation on the performance of maximum ratio combining"

Connected through hyperedge HE-7 (induced by source paper "uplink based framework for control plane applications in 5g mmwave cellular networks"):
  with members:
    - "towards an appropriate beamforming scheme for initial cell discovery in mmw 5g cellular networks"
    - "channel dynamics and snr tracking in millimeter wave cellular systems"
    - "initial access in 5g mmwave cellular networks"
    - "multi connectivity in 5g mmwave cellular networks"
    - "towards an appropriate receiver beamforming scheme for millimeter wave communication a power consumption based comparison"
    - "comparative analysis of initial access techniques in 5g mmwave cellular networks"
    - "context information for fast cell discovery in mm wave 5g networks"
    - "millimeter wave cellular networks a mac layer perspective"

Connected through hyperedge HE-8 (induced by source paper "handover management in 5g and beyond a topology aware skipping approach"):
  with members:
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "fronthauling for 5g lte u ultra dense cloud small cell networks"
    - "handover management in dense cellular networks a stochastic geometry approach"
    - "mobility aware modeling and analysis of dense cellular networks with c plane u plane split architecture"
    - "cooperative handover management in dense cellular networks"
    - "self organization in disaster resilient heterogeneous small cell networks"
    - "cooperative interference mitigation and handover management for heterogeneous cloud small cell networks"
    - "user mobility evaluation for 5g small cell networks based on individual mobility model"

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.NI(Networking and Internet Architecture)