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: "analytical evaluation of fractional frequency reuse for heterogeneous cellular networks"
  Abstract: Interference management techniques are critical to the performance of heterogeneous cellular networks, which will have dense and overlapping coverage areas, and experience high levels of interference. Fractional frequency reuse (FFR) is an attractive interference management technique due to its low complexity and overhead, and significant coverage improvement for low-percentile (cell-edge) users. Instead of relying on system simulations based on deterministic access point locations, this paper instead proposes an analytical model for evaluating Strict FFR and Soft Frequency Reuse (SFR) deployments based on the spatial Poisson point process. Our results both capture the non-uniformity of heterogeneous deployments and produce tractable expressions which can be used for system design with Strict FFR and SFR. We observe that the use of Strict FFR bands reserved for the users of each tier with the lowest average SINR provides the highest gains in terms of coverage and rate, while the use of SFR allows for more efficient use of shared spectrum between the tiers, while still mitigating much of the interference. Additionally, in the context of multi-tier networks with closed access in some tiers, the proposed framework shows the impact of cross-tier interference on closed access FFR, and informs the selection of key FFR parameters in open access.

Connected through hyperedge HE-1 (induced by source paper "treating interference as noise in cellular networks a stochastic geometry approach"):
  with members:
    - "system level modeling and optimization of the energy efficiency in cellular networks a stochastic geometry framework"
    - "downlink and uplink decoupling in two tier heterogeneous networks with multi antenna base stations"
    - "backscatter communications for the internet of things a stochastic geometry approach"
    - "enhanced cellular coverage and throughput using rateless codes"
    - "analytical modeling of interference aware power control for the uplink of heterogeneous cellular networks"
    - "stochastic geometry modeling and analysis of multi tier millimeter wave cellular networks"
    - "optimality of treating interference as noise a combinatorial perspective"
    - "coverage and rate analysis for millimeter wave cellular networks"

Connected through hyperedge HE-2 (induced by source paper "load aware performance analysis of cell center edge users in random hetnets"):
  with members:
    - "a primer on cellular network analysis using stochastic geometry"
    - "offloading in heterogeneous networks modeling analysis and design insights"
    - "load aware modeling and analysis of heterogeneous cellular networks"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"
    - "modeling heterogeneous network interference using poisson point processes"
    - "modeling and analysis of k tier downlink heterogeneous cellular networks"
    - "a tractable approach to coverage and rate in cellular networks"
    - "analytical evaluation of fractional frequency reuse for ofdma cellular networks"

Connected through hyperedge HE-3 (induced by source paper "handoff rate and coverage analysis in multi tier heterogeneous networks"):
  with members:
    - "tier association probability and spectrum partitioning for maximum rate coverage in multi tier heterogeneous networks"
    - "joint resource partitioning and offloading in heterogeneous cellular networks"
    - "structured spectrum allocation and user association in heterogeneous cellular networks"
    - "downlink rate distribution in heterogeneous cellular networks under generalized cell selection"
    - "offloading in heterogeneous networks modeling analysis and design insights"
    - "towards understanding the fundamentals of mobility in cellular networks"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"
    - "modeling heterogeneous network interference using poisson point processes"

Connected through hyperedge HE-4 (induced by source paper "spectrum allocation for icic based picocell"):
  with members:
    - "analysis and comparison of coverage probability in the presence of correlated nakagami m interferers and non identical independent nakagami m interferers"
    - "optimal thresholds for coverage and rate in ffr schemes for planned cellular networks"
    - "power control factor selection in uplink ofdma cellular networks"
    - "modeling heterogeneous network interference using poisson point processes"
    - "modeling and analysis of k tier downlink heterogeneous cellular networks"
    - "a tractable approach to coverage and rate in cellular networks"
    - "analytical evaluation of fractional frequency reuse for ofdma cellular networks"

Connected through hyperedge HE-5 (induced by source paper "massive mimo meets hetnet interference coordination through spatial blanking"):
  with members:
    - "an overview of load balancing in hetnets old myths and open problems"
    - "on the optimality of treating interference as noise"
    - "on number of almost blank subframes in heterogeneous cellular networks"
    - "downlink mimo hetnets modeling ordering results and performance analysis"
    - "joint resource partitioning and offloading in heterogeneous cellular networks"
    - "joint spatial division and multiplexing for mm wave channels"
    - "downlink multi antenna heterogeneous cellular network with load balancing"
    - "offloading in heterogeneous networks modeling analysis and design insights"

Connected through hyperedge HE-6 (induced by source paper "a stochastic geometry analysis of inter cell interference coordination and intra cell diversity"):
  with members:
    - "the performance of successive interference cancellation in random wireless networks"
    - "effect of spatial interference correlation on the performance of maximum ratio combining"
    - "diversity polynomials for the analysis of temporal correlations in wireless networks"
    - "diversity loss due to interference correlation"
    - "a tractable approach to coverage and rate in cellular networks"
    - "analytical evaluation of fractional frequency reuse for ofdma cellular networks"

Connected through hyperedge HE-7 (induced by source paper "tier association probability and spectrum partitioning for maximum rate coverage in multi tier heterogeneous networks"):
  with members:
    - "joint resource partitioning and offloading in heterogeneous cellular networks"
    - "structured spectrum allocation and user association in heterogeneous cellular networks"
    - "offloading in heterogeneous networks modeling analysis and design insights"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"
    - "a tractable approach to coverage and rate in cellular networks"

Connected through hyperedge HE-8 (induced by source paper "energy efficient resource allocation for fractional frequency reuse in heterogeneous networks"):
  with members:
    - "quantifying potential energy efficiency gain in green cellular wireless networks"
    - "a parameterized base station power model"
    - "interference based cell selection in heterogenous 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)