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: "two way communication with energy exchange"
  Abstract: The conventional assumption made in the design of communication systems is that the energy used to transfer information between a sender and a recipient cannot be reused for future communication tasks. A notable exception to this norm is given by passive RFID systems, in which a reader can transfer both information and energy via the transmitted radio signal. Conceivably, any system that exchanges information via the transfer of given physical resources (radio waves, particles, qubits) can potentially reuse, at least part, of the received resources for communication later on. In this paper, a two-way communication system is considered that operates with a given initial number of physical resources, referred to as energy units. The energy units are not replenished from outside the system, and are assumed, for simplicity, to be constant over time. A node can either send an "on" symbol (or "1"), which costs one unit of energy, or an "off" signal (or "0"), which does not require any energy expenditure. Upon reception of a "1" signal, the recipient node "harvests" the energy contained in the signal and stores it for future communication tasks. Inner and outer bounds on the achievable rates are derived, and shown via numerical results to coincide if the number of energy units is large enough.

Connected through hyperedge HE-1 (induced by source paper "robust transceiver design for miso interference channel with energy harvesting"):
  with members:
    - "distributed power splitting for swipt in relay interference channels using game theory"
    - "secure beamforming for mimo broadcasting with wireless information and power transfer"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "joint transmit beamforming and receive power splitting for miso swipt systems"
    - "beamforming for miso interference channels with qos and rf energy transfer"
    - "interactive joint transfer of energy and information"
    - "wireless information and power transfer a dynamic power splitting approach"
    - "distributed robust multicell coordinated beamforming with imperfect csi an admm approach"

Connected through hyperedge HE-2 (induced by source paper "joint transceiver design algorithms for multiuser miso relay systems with energy harvesting"):
  with members:
    - "a general design framework for mimo wireless energy transfer with limited feedback"
    - "robust transceiver design for miso interference channel with energy harvesting"
    - "distributed power splitting for swipt in relay interference channels using game theory"
    - "collaborative wireless energy and information transfer in interference channel"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "full duplex wireless powered relay with self energy recycling"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "joint transmit beamforming and receive power splitting for miso swipt systems"

Connected through hyperedge HE-3 (induced by source paper "beamforming for miso interference channels with qos and rf energy transfer"):
  with members:
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "joint transmit beamforming and receive power splitting for miso swipt systems"
    - "joint beamforming and power control in coordinated multicell max min duality effective network and large system transition"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "relay selection for simultaneous information transmission and wireless energy transfer a tradeoff perspective"
    - "wireless information and power transfer a dynamic power splitting approach"
    - "throughput maximization for an energy harvesting communication system with processing cost"
    - "medium access control protocols for wireless sensor networks with energy harvesting"

Connected through hyperedge HE-4 (induced by source paper "optimal packet scheduling in energy harvesting multiple access channels with common data"):
  with members:
    - "on online energy harvesting in multiple access communication systems"
    - "on the transfer of information and energy in multi user systems"
    - "transmission with energy harvesting nodes in fading wireless channels optimal policies"
    - "optimal packet scheduling in an energy harvesting communication system"
    - "multiple access channels with cooperative encoders and channel state information"
    - "joint source channel coding over a fading multiple access channel with partial channel state information"

Connected through hyperedge HE-5 (induced by source paper "energy cooperation in energy harvesting communications"):
  with members:
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "optimal scheduling and power allocation for two hop energy harvesting communication systems"
    - "throughput optimal policies for energy harvesting wireless transmitters with non ideal circuit power"
    - "throughput maximization for an energy harvesting communication system with processing cost"
    - "on the transfer of information and energy in multi user systems"
    - "enabling wireless power transfer in cellular networks architecture modeling and deployment"
    - "communicating using an energy harvesting transmitter optimum policies under energy storage losses"
    - "optimal transmission policies for energy harvesting two hop networks"

Connected through hyperedge HE-6 (induced by source paper "on the transfer of information and energy in multi user systems"):
  with members:
    - "mimo broadcasting for simultaneous wireless information and power transfer"

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)