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: "battery powered devices in wpcns"
  Abstract: Wireless powered communication networks are becoming an effective solution for improving self sustainability of mobile devices. In this context, a hybrid access point transfers energy to a group of nodes, which use the harvested energy to perform computation or transmission tasks. While the availability of the wireless energy transfer mechanism opens up new frontiers, an appropriate choice of the network parameters (e.g., transmission powers, transmission duration, amount of transferred energy, etc.) is required in order to achieve high performance. In this work, we study the throughput optimization problem in a system composed of an access point which recharges the batteries of two devices at different distances. In the literature, the main focus so far has been on slot-oriented optimization, in which all the harvested energy is used in the same slot in which it is harvested. However, this approach is strongly sub-optimal because it does not exploit the possibility to store the energy and use it at a later time. Thus, instead of considering the slot-oriented case, we address the long-term maximization. This assumption greatly increases the optimization complexity, requiring to consider, e.g., the channel state realizations, its statistics and the batteries evolution. Our objective is to find the best scheduling scheme, both for the energy transferred by the access point and for the data sent by the two nodes. We discuss how to perform the maximization with optimal as well as approximate techniques and show that the slot-oriented policies proposed so far are strongly sub-optimal in the long run.

Connected through hyperedge HE-1 (induced by source paper "online policies for throughput maximization of energy constrained wireless powered communication systems"):
  with members:
    - "optimization of energy constrained wireless powered communication networks with heterogeneous nodes"
    - "wireless power meets energy harvesting a joint energy allocation approach in ofdm based system"
    - "resource allocation and fairness in wireless powered cooperative cognitive radio networks"
    - "on optimal policies in full duplex wireless powered communication networks"
    - "an overview of sustainable green 5g networks"
    - "dynamic base station operation in large scale green cellular networks"
    - "optimal design of non orthogonal multiple access with wireless power transfer"
    - "energy efficient resource allocation for wireless powered communication networks"

Connected through hyperedge HE-2 (induced by source paper "an energy efficient controller for wirelessly powered communication networks"):
  with members:
    - "swipt using hybrid arq over time varying channels"
    - "optimal and near optimal policies for wireless power transfer in energy limited and power limited scenarios"
    - "joint sum rate and error probability optimization finite blocklength analysis"
    - "joint transfer of energy and information in a two hop relay channel"
    - "optimal energy and data routing in networks with energy cooperation"
    - "wireless powered relaying with finite block length codes"
    - "on wireless energy and information transfer in relay networks"
    - "communications and signals design for wireless power transmission"

Connected through hyperedge HE-3 (induced by source paper "efficient fair and qos aware policies for wirelessly powered communication networks"):
  with members:
    - "online policies for throughput maximization of energy constrained wireless powered communication systems"
    - "optimal and near optimal policies for wireless power transfer in energy limited and power limited scenarios"
    - "optimal hierarchical radio resource management for hetnets with flexible backhaul"
    - "distributed wireless power transfer with energy feedback"
    - "theory and experiment for wireless powered sensor networks how to keep sensors alive"
    - "capacity of remotely powered communication"
    - "wireless powered communication opportunities and challenges"
    - "wireless power transfer survey and roadmap"

Connected through hyperedge HE-4 (induced by source paper "finite horizon throughput maximization for a wirelessly powered device over a time varying channel"):
  with members:
    - "finite horizon throughput maximization and sensing optimization in wireless powered devices over fading channels"
    - "non orthogonal multiple access schemes in wireless powered communication networks"
    - "energy efficient resource allocation for wireless powered communication networks"
    - "optimal resource allocation in full duplex wireless powered communication network"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "throughput maximization in wireless powered communication networks"
    - "energy efficient scheduling of delay constrained traffic over fading channels"

Connected through hyperedge HE-5 (induced by source paper "finite horizon throughput maximization and sensing optimization in wireless powered devices over fading channels"):
  with members:
    - "a survey on mobile edge computing the communication perspective"
    - "a tutorial on thompson sampling"
    - "computation rate maximization for wireless powered mobile edge computing"
    - "non orthogonal multiple access schemes in wireless powered communication networks"
    - "user cooperation for enhanced throughput fairness in wireless powered communication networks"
    - "on optimal policies in full duplex wireless powered communication networks"
    - "an adaptive transmission protocol for wireless powered cooperative communications"
    - "optimum wirelessly powered relaying"

Connected through hyperedge HE-6 (induced by source paper "optimal and near optimal policies for wireless power transfer in energy limited and power limited scenarios"):
  with members:
    - "wireless power transfer survey and roadmap"
    - "distributed energy beamforming with one bit feedback"
    - "recent advances in joint wireless energy and information transfer"
    - "user cooperation in wireless powered communication networks"
    - "optimal resource allocation in full duplex wireless powered communication network"
    - "energy beamforming with one bit feedback"
    - "optimized training design for wireless energy transfer"
    - "throughput maximization in wireless powered communication networks"

Connected through hyperedge HE-7 (induced by source paper "a decentralized optimization framework for energy harvesting devices"):
  with members:
    - "decentralized transmission policies for energy harvesting devices"
    - "optimal adaptive random multiaccess in energy harvesting wireless sensor networks"
    - "energy harvesting wireless communications a review of recent advances"
    - "markov decision processes with applications in wireless sensor networks a survey"
    - "joint transmission and energy transfer policies for energy harvesting devices with finite batteries"
    - "universally near optimal online power control for energy harvesting nodes"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "a learning theoretic approach to energy harvesting communication system optimization"

Connected through hyperedge HE-8 (induced by source paper "non orthogonal multiple access schemes in wireless powered communication networks"):
  with members:
    - "optimization of energy constrained wireless powered communication networks with heterogeneous nodes"
    - "wireless powered communications with non orthogonal multiple access"
    - "on optimal policies in full duplex wireless powered communication networks"
    - "optimal design of non orthogonal multiple access with wireless power transfer"
    - "energy harvesting networks with energy cooperation procrastinating policies"
    - "joint transmission and energy transfer policies for energy harvesting devices with finite batteries"
    - "user cooperation in wireless powered communication networks"
    - "throughput maximization in wireless powered communication 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)