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 "cooperative strategies for wireless powered communications"):
  Abstract: Radio frequency (RF) energy transfer and harvesting has been intensively studied recently as a promising approach to significantly extend the lifetime of energy-constrained wireless networks. This technique has a great potential to provide relatively stable and continuous RF energy to devices wirelessly, it thus opened a new research paradigm, termed wireless-powered communication (WPC), which has raised many new research opportunities with wide applications. Among these, the design and evaluation of cooperative schemes towards energy-efficient WPC have attracted tremendous research interests nowadays. This article provides an overview of various energy-efficient cooperative strategies for WPC, with particular emphasis on relaying protocols for wireless-powered cooperative communications, cooperative spectrum sharing schemes for wireless-powered cognitive radio networks, and cooperative jamming strategies towards wireless-powered secure communications. We also identify some valuable research directions in this area before concluding this article.

Includes members:
  Member "end to end throughput maximization for underlay multi hop cognitive radio networks with rf energy harvesting":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "simultaneous wireless information and power transfer for decode and forward multihop relay systems in energy constrained iot networks")
  Member "optimizing df cognitive radio networks with full duplex enabled energy access points":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "max min fairness user scheduling and power allocation in full duplex ofdma systems")
  Member "to harvest and jam a paradigm of self sustaining friendly jammers for secure af relaying":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "mitigating jamming attacks using energy harvesting")
  Member "wireless powered communication opportunities and challenges":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "wirelessly powered sensor networks power allocation for channel estimation and energy beamforming")
  Member "distributed and optimal resource allocation for power beacon assisted wireless powered communications":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "transmission delay minimization in wireless powered communication systems")
  Member "harvest then cooperate wireless powered cooperative communications":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "relay selection scheduling and power control in wireless powered cooperative communication networks")
  Member "wireless powered cooperative communications via a hybrid relay":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "charge then forward wireless powered communication for multiuser relay networks")
  Member "wireless networks with rf energy harvesting a contemporary survey":
    also connected through other hyperedges:
      - Hyperedge HE-8 (induced by source paper "wirelessly powered sensor networks power allocation for channel estimation and energy beamforming")

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)