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: "on the limits of coexisting coverage and capacity in multi rat heterogeneous networks"
  Abstract: This paper devises a general modeling and analyzing framework for a heterogeneous wireless network (HetNet) in which several wireless subnetworks coexist and use multiple radio access technologies (multi-RATs). The coexisting coverage and network capacity in such a multi-RAT HetNet are hardly investigated in prior works. To characterize the coexisting interactions in a multi-RAT HetNet, in this paper we consider a HetNet consisting of K-tier APs and two different RATs, RAT-L and RAT-U, are adopted in the HetNet. RAT-L is adopted by the access points (APs) in the first K-1 tiers and APs in the Kth tier only use RAT-U. Both noncrossing-RAT and crossing-RAT user association scenarios are considered. In each scenario, the void probability and channel access probability of the APs in each tier are first found and then the tight lower bounds and their lowest limits on the proposed coexisting coverage and network capacity are derived. We show that multi-RAT networks in general can achieve higher link coverage and capacity by using opportunistic CSMA/CA that avoids/alleviates severe interfering between all coexisting APs. Also, crossing-RAT user association is shown to achieve much higher coexisting coverage and network capacity than noncrossing-RAT user association. Finally, numerical simulations for the LTE-U and WiFi networks coexisting in the HetNet validate our findings.

Connected through hyperedge HE-1 (induced by source paper "fundamentals of simultaneous wireless information and power transmission in heterogeneous networks a cell load perspective"):
  with members:
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "wireless power transfer in massive mimo aided hetnets with user association"
    - "fundamentals of the downlink green coverage and energy efficiency in heterogeneous networks"
    - "traffic management for heterogeneous networks with opportunistic unlicensed spectrum sharing"
    - "random cell association and void probability in poisson distributed cellular networks"
    - "optimal cell load and throughput in green small cell networks with generalized cell association"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "simultaneous information and energy transfer in large scale networks with without relaying"

Connected through hyperedge HE-2 (induced by source paper "full duplex heterogeneous networks with decoupled user association rate analysis and traffic scheduling"):
  with members:
    - "user selection and power allocation in full duplex multicell networks"
    - "downlink and uplink decoupling in two tier heterogeneous networks with multi antenna base stations"
    - "optimal joint power and subcarrier allocation for full duplex multicarrier non orthogonal multiple access systems"
    - "fundamentals of the downlink green coverage and energy efficiency in heterogeneous networks"
    - "traffic management for heterogeneous networks with opportunistic unlicensed spectrum sharing"
    - "full duplex mimo small cell networks with interference cancellation"
    - "random cell association and void probability in poisson distributed cellular networks"
    - "why to decouple the uplink and downlink in cellular networks and how to do it"

Connected through hyperedge HE-3 (induced by source paper "traffic management for heterogeneous networks with opportunistic unlicensed spectrum sharing"):
  with members:
    - "modeling and analyzing the coexistence of wi fi and lte in unlicensed spectrum"
    - "fundamentals of the downlink green coverage and energy efficiency in heterogeneous networks"
    - "coexisting success probability and throughput of multi rat wireless networks with unlicensed band access"
    - "random cell association and void probability in poisson distributed cellular networks"
    - "small cell traffic balancing over licensed and unlicensed bands"
    - "optimal cell load and throughput in green small cell networks with generalized cell association"
    - "coexistence of wi fi and heterogeneous small cell networks sharing unlicensed spectrum"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"

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)