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: "collaborative wireless energy and information transfer in interference channel"
  Abstract: This paper studies the  simultaneous wireless information and power transfer  (SWIPT) in a multiuser wireless system, in which distributed transmitters send independent messages to their respective receivers, and at the same time cooperatively transmit wireless power to the receivers via energy beamforming. Accordingly, from the wireless information transmission (WIT) perspective, the system of interest can be modeled as the classic interference channel, while it also can be regarded as a distributed multiple-input multiple-output (MIMO) system for collaborative wireless energy transmission (WET). To enable both information decoding (ID) and energy harvesting (EH) in SWIPT, we adopt the low-complexity  time switching  operation at each receiver to switch between the ID and EH modes over scheduled time. For the hybrid system, we aim to characterize the achievable rate-energy (R–E) trade-offs by various transmitter-side collaboration schemes. Specifically, to facilitate the collaborative energy beamforming, we propose a new  signal splitting  scheme at the transmitters, where each transmit signal is generally split into an  information signal  and an  energy signal  for WIT and WET, respectively. With this new scheme, first, we study the two-user SWIPT system over the fading channel and derive the optimal mode switching rule at the receivers as well as the corresponding transmit signal optimization to achieve various R-E trade-offs. We also compare the R-E performance of our proposed scheme with transmit energy beamforming and signal splitting against two existing schemes with partial or no cooperation of the transmitters. Next, the general case of SWIPT systems with more than two users is studied, for which we propose a practical transmit collaboration scheme by extending the result for the two-user case: we group users into different pairs and apply the cooperation schemes obtained in the two-user case to each paired group. Furthermore, we present a benchmarking scheme based on joint cooperation of all the transmitters inspired by the principle of  interference alignment , against which the performance of the proposed scheme is compared.

Connected through hyperedge HE-1 (induced by source paper "joint beamforming and power splitting design for c ran with multicast fronthaul"):
  with members:
    - "optimized base station cache allocation for cloud radio access network with multicast backhaul"
    - "beamforming design for max min fair swipt in green cloud ran with wireless fronthaul"
    - "joint millimeter wave fronthaul and ofdma resource allocation in ultra dense cran"
    - "energy efficient joint congestion control and resource optimization in heterogeneous cloud radio access networks"
    - "wireless powered communication opportunities and challenges"
    - "outage constrained robust transmit optimization for multiuser miso downlinks tractable approximations by conic optimization"

Connected through hyperedge HE-2 (induced by source paper "transmission delay minimization in wireless powered communication systems"):
  with members:
    - "power allocation and effective capacity of af successive relays"
    - "optimization and analysis of wireless powered multi antenna cooperative systems"
    - "cross layer optimization for ultra reliable and low latency radio access networks"
    - "wireless powered dual hop multi antenna relaying systems impact of csi and antenna correlation"
    - "effective capacity of receive antenna selection mimo ostbc systems in co channel interference"
    - "wireless charging technologies fundamentals standards and network applications"
    - "wireless powered communication networks an overview"
    - "some new research trends in wirelessly powered communications"

Connected through hyperedge HE-3 (induced by source paper "common throughput maximization for uav enabled interference channel with wireless powered communications"):
  with members:
    - "uav communications for 5g and beyond recent advances and future trends"
    - "fundamentals of wireless information and power transfer from rf energy harvester models to signal and system designs"
    - "capacity characterization of uav enabled two user broadcast channel"
    - "cellular enabled uav communication a connectivity constrained trajectory optimization perspective"
    - "optimal 1d trajectory design for uav enabled multiuser wireless power transfer"
    - "minimum throughput maximization in uav aided wireless powered communication networks"
    - "a tutorial on uavs for wireless networks applications challenges and open problems"
    - "uav enabled wireless power transfer with directional antenna a two user case"

Connected through hyperedge HE-4 (induced by source paper "dynamic power splitting for swipt with nonlinear energy harvesting in ergodic fading channel"):
  with members:
    - "fundamentals of wireless information and power transfer from rf energy harvester models to signal and system designs"
    - "joint tx power allocation and rx power splitting for swipt system with multiple nonlinear energy harvesting circuits"
    - "wirelessly powered backscatter communications waveform design and snr energy tradeoff"
    - "secure swipt networks based on a non linear energy harvesting model"
    - "wireless information and power transfer over an awgn channel nonlinearity and asymmetric gaussian signaling"
    - "waveform design for wireless power transfer"
    - "wireless information and power transfer nonlinearity waveform design and rate energy tradeoff"
    - "secrecy wireless information and power transfer in fading wiretap channel"

Connected through hyperedge HE-5 (induced by source paper "distributed wireless power transfer with energy feedback"):
  with members:
    - "a general design framework for mimo wireless energy transfer with limited feedback"
    - "wireless powered communication networks an overview"
    - "some new research trends in wirelessly powered communications"
    - "wireless powered communication opportunities and challenges"
    - "distributed energy beamforming with one bit feedback"
    - "optimized training for net energy maximization in multi antenna wireless energy transfer over frequency selective channel"
    - "simultaneous wireless information and power transfer in modern communication systems"
    - "energy beamforming with one bit feedback"

Connected through hyperedge HE-6 (induced by source paper "achievable rate region of non orthogonal multiple access systems with wireless powered decoder"):
  with members:
    - "wireless powered communication networks an overview"
    - "communications and signals design for wireless power transmission"
    - "cooperative non orthogonal multiple access with simultaneous wireless information and power transfer"
    - "practical non linear energy harvesting model and resource allocation for swipt systems"
    - "fairness for non orthogonal multiple access in 5g systems"
    - "wireless information and power transfer in relay systems with multiple antennas and interference"
    - "outage minimization for a fading wireless link with energy harvesting transmitter and receiver"
    - "uplink non orthogonal multiple access for 5g wireless networks"

Connected through hyperedge HE-7 (induced by source paper "group cooperation with optimal resource allocation in wireless powered communication networks"):
  with members:
    - "resource allocation and fairness in wireless powered cooperative cognitive radio networks"
    - "wireless powered communication networks an overview"
    - "wireless powered cooperative communications power splitting relaying with energy accumulation"
    - "wireless powered communication opportunities and challenges"
    - "resource allocation techniques for wireless powered communication networks with energy storage constraint"
    - "relay selection in wireless powered cooperative networks with energy storage"
    - "energy harvesting wireless communications a review of recent advances"
    - "placement optimization of energy and information access points in wireless powered communication networks"

Connected through hyperedge HE-8 (induced by source paper "transmission game in mimo interference channels with radio frequency energy harvesting"):
  with members:
    - "information and energy cooperation in ofdm relaying protocols and optimization"
    - "multiuser miso beamforming for simultaneous wireless information and power transfer"
    - "wireless information and energy transfer in multi antenna interference channel"
    - "simultaneous information and power transfer for broadband wireless systems"
    - "wireless information and power transfer in multiuser ofdm systems"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "wireless information transfer with opportunistic energy harvesting"
    - "enabling wireless power transfer in cellular networks architecture modeling and deployment"

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)