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: "an analysis of the ds cdma cellular uplink for arbitrary and constrained topologies"
  Abstract: A new analysis is presented for the direct-sequence code-division multiple access (DS-CDMA) cellular uplink. For a given network topology, closed-form expressions are found for the outage probability and rate of each uplink in the presence of path-dependent Nakagami fading and shadowing. The topology may be arbitrary or modeled by a random spatial distribution with a fixed number of base stations and mobiles placed over a finite area. The analysis is more detailed and accurate than existing ones and facilitates the resolution of network design issues including the influence of the minimum base-station separation, the role of the spreading factor, and the impact of various power-control and rate-control policies. It is shown that once power control is established, the rate can be allocated according to a fixed-rate or variable-rate policy with the objective of either meeting an outage constraint or maximizing throughput. An advantage of variable-rate power control is that it allows an outage constraint to be enforced on every uplink, which is impossible when a fixed rate is used throughout the network.

Connected through hyperedge HE-1 (induced by source paper "analyzing the impact of access point density on the performance of finite area networks"):
  with members:
    - "joint rate and sinr coverage analysis for decoupled uplink downlink biased cell associations in hetnets"
    - "downlink mimo hetnets modeling ordering results and performance analysis"
    - "equivalence and comparison of heterogeneous cellular networks"
    - "analyzing the reduced required bs density due to comp in cellular networks"
    - "average rate of downlink heterogeneous cellular networks over generalized fading channels a stochastic geometry approach"
    - "distance distributions in regular polygons"
    - "downlink rate distribution in heterogeneous cellular networks under generalized cell selection"
    - "offloading in heterogeneous networks modeling analysis and design insights"

Connected through hyperedge HE-2 (induced by source paper "frequency hopping on a 5g millimeter wave uplink"):
  with members:
    - "stochastic geometry modeling and analysis of multi tier millimeter wave cellular networks"
    - "performance analysis of fifth generation cellular uplink"
    - "average error probability analysis in mmwave cellular networks"
    - "tractable model for rate in self backhauled millimeter wave cellular networks"
    - "a direct approach to computing spatially averaged outage probability"
    - "coverage and rate analysis for millimeter wave cellular networks"
    - "what will 5g be"
    - "millimeter wave cellular wireless networks potentials and challenges"

Connected through hyperedge HE-3 (induced by source paper "an accurate and efficient analysis of a mbsfn network"):
  with members:
    - "analysis of multi cell downlink cooperation with a constrained spatial model"
    - "a new analysis of the ds cdma cellular downlink under spatial constraints"
    - "the outage probability of a finite ad hoc network in nakagami fading"
    - "a tractable approach to coverage and rate in cellular networks"

Connected through hyperedge HE-4 (induced by source paper "the role of computational outage in dense cloud based centralized radio access networks"):
  with members:
    - "analytical modeling of uplink cellular networks"
    - "towards a communication theoretic understanding of system level power consumption"

Connected through hyperedge HE-5 (induced by source paper "a new analysis of the ds cdma cellular downlink under spatial constraints"):
  with members:
    - "modeling and analysis of k tier downlink heterogeneous cellular networks"
    - "the outage probability of a finite ad hoc network in nakagami fading"
    - "a tractable approach to coverage and rate in cellular networks"
    - "an overview of the transmission capacity of wireless 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)