human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "optimal spectrum access for a rechargeable cognitive radio user based on energy buffer state"):
  Abstract: This paper investigates the maximum throughput for a rechargeable secondary user (SU) sharing the spectrum with a primary user (PU) plugged to a reliable power supply. The SU maintains a finite energy queue and harvests energy from natural resources, e.g., solar, wind and acoustic noise. We propose a probabilistic access strategy by the SU based on the number of packets at its energy queue. We investigate the effect of the energy arrival rate, the amount of energy per energy packet, and the capacity of the energy queue on the SU throughput under fading channels. Results reveal that the proposed access strategy can enhance the performance of the SU.

Includes members:
  Member "dynamic spectrum access in cognitive radio networks with rf energy harvesting":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "compressive spectrum sensing for cognitive radio networks")
  Member "on spectrum sharing between energy harvesting cognitive radio users and primary users":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "interference aided energy harvesting cognitive relaying with multiple primary transceivers")
  Member "power optimal feedback based random spectrum access for an energy harvesting cognitive user":
    also connected through other hyperedges:
      (none)
  Member "on the coexistence of a primary user with an energy harvesting secondary user a case of cognitive cooperation":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "on spectrum sharing between energy harvesting cognitive radio users and primary users")
  Member "optimal selection of spectrum sensing duration for an energy harvesting cognitive radio":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "cooperative cognitive radio network with energy harvesting stability analysis")
  Member "optimal random access and random spectrum sensing for an energy harvesting cognitive radio":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "on energy cooperation in energy harvesting underlay cognitive radio network")
  Member "cooperative cognitive relaying with ordered cognitive multiple access":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "a particle filtering approach for enabling distributed and scalable sharing of dsa network resources")
  Member "green cellular networks a survey some research issues and challenges":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "spatial and temporal management of cellular hetnets with multiple solar powered drones")

Question: Please tell me which class the source paper 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)