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: "energy efficient resource allocation in ofdma systems with hybrid energy harvesting base station"
  Abstract: We study resource allocation algorithm design for energy-efficient communication in an OFDMA downlink network with hybrid energy harvesting base station. Specifically, an energy harvester and a constant energy source driven by a non-renewable resource are used for supplying the energy required for system operation. We first consider a deterministic offline system setting. In particular, assuming availability of non-causal knowledge about energy arrivals and channel gains, an offline resource allocation problem is formulated as a non-convex optimization problem taking into account the circuit energy consumption, a finite energy storage capacity, and a minimum required data rate. We transform this non-convex optimization problem into a convex optimization problem by applying time-sharing and fractional programming which results in an efficient asymptotically optimal offline iterative resource allocation algorithm. In each iteration, the transformed problem is solved by using Lagrange dual decomposition. The obtained resource allocation policy maximizes the weighted energy efficiency of data transmission. Subsequently, we focus on online algorithm design. A stochastic dynamic programming approach is employed to obtain the optimal online resource allocation algorithm which requires a prohibitively high complexity. To strike a balance between system performance and computational complexity, we propose a low complexity suboptimal online iterative algorithm which is motivated by the offline optimization.

Connected through hyperedge HE-1 (induced by source paper "cross layer scheduling and beamforming in smart grid powered cellular networks with heterogeneous energy coordination"):
  with members:
    - "deep reinforcement learning for adaptive caching in hierarchical content delivery networks"
    - "optimal 3d trajectory design and resource allocation for solar powered uav communication systems"
    - "robust energy efficient beamforming in misome swipt systems with proportional secrecy rate"
    - "dynamic cross layer beamforming in hybrid powered communication systems with harvest use trade strategy"
    - "a hybrid energy sharing framework for green cellular networks"
    - "an overview of sustainable green 5g networks"
    - "ergodic energy management leveraging resource variability in distribution grids"
    - "comp meets smart grid a new communication and energy cooperation paradigm"

Connected through hyperedge HE-2 (induced by source paper "energy efficiency of distributed antenna systems with wireless power transfer"):
  with members:
    - "energy efficient swipt in iot distributed antenna systems"
    - "wirelessly powered backscatter communications waveform design and snr energy tradeoff"
    - "fundamental green tradeoffs progresses challenges and impacts on 5g networks"
    - "power allocation for secure swipt systems with wireless powered cooperative jamming"
    - "wireless information and power transfer nonlinearity waveform design and rate energy tradeoff"
    - "artificial noise aided secrecy information and power transfer in ofdma systems"
    - "information and energy cooperation in ofdm relaying protocols and optimization"
    - "secure and green swipt in distributed antenna networks with limited backhaul capacity"

Connected through hyperedge HE-3 (induced by source paper "online power allocation at energy harvesting transmitter for multiple receivers with and without individual rate constraints for oma and noma transmissions"):
  with members:
    - "stochastic control of computation offloading to a helper with a dynamically loaded cpu"
    - "dynamic computation offloading for mobile edge computing with energy harvesting devices"
    - "online power control optimization for wireless transmission with energy harvesting and storage"
    - "energy efficient transmission design in non orthogonal multiple access"
    - "throughput optimal policies for energy harvesting wireless transmitters with non ideal circuit power"
    - "optimal energy allocation for wireless communications with energy harvesting constraints"

Connected through hyperedge HE-4 (induced by source paper "understanding relative network delay inmicro energy harvesting wireless networks"):
  with members:
    - "throughput optimal policies for energy harvesting wireless transmitters with non ideal circuit power"

Connected through hyperedge HE-5 (induced by source paper "energy efficient resource allocation for time varying ofdma relay systems with hybrid energy supplies"):
  with members:
    - "cross layer scheduling for ofdma based cognitive radio systems with delay and security constraints"
    - "power allocation for conventional and buffer aided link adaptive relaying systems with energy harvesting nodes"
    - "maximizing energy efficiency in multi relay ofdma cellular networks"
    - "decentralized delay optimal control for interference networks with limited renewable energy storage"
    - "jointly optimal channel and power assignment for dual hop multi channel multi user relaying"
    - "a cross layer perspective on energy harvesting aided green communications over fading channels"
    - "adaptive power management for wireless base stations in a smart grid environment"
    - "wsr maximized resource allocation in multiple df relays aided ofdma downlink transmission"

Connected through hyperedge HE-6 (induced by source paper "secure swipt networks based on a non linear energy harvesting model"):
  with members:
    - "robust layered transmission in secure miso multiuser unicast cognitive radio systems"
    - "secrecy wireless information and power transfer challenges and opportunities"
    - "practical non linear energy harvesting model and resource allocation for swipt systems"
    - "energy efficient resource allocation for wireless powered communication networks"
    - "enhancing wireless information and power transfer by exploiting multi antenna techniques"
    - "multi objective optimization for robust power efficient and secure full duplex wireless communication systems"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "simultaneous wireless information and power transfer in modern communication systems"

Connected through hyperedge HE-7 (induced by source paper "max min fair beamforming for swipt systems with non linear eh model"):
  with members:
    - "secure swipt networks based on a non linear energy harvesting model"
    - "robust resource allocation for mimo wireless powered communication networks based on a non linear eh model"
    - "practical non linear energy harvesting model and resource allocation for swipt systems"
    - "enhancing wireless information and power transfer by exploiting multi antenna techniques"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "secure and green swipt in distributed antenna networks with limited backhaul capacity"
    - "max min fair wireless energy transfer for secure multiuser communication systems"
    - "secrecy wireless information and power transfer with miso beamforming"

Connected through hyperedge HE-8 (induced by source paper "beamforming and power splitting designs for an aided secure multi user mimo swipt systems"):
  with members:
    - "transceiver design to maximize the weighted sum secrecy rate in full duplex swipt systems"
    - "physical layer security in mimo backscatter wireless systems"
    - "wireless powered communication opportunities and challenges"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "secure beamforming for mimo broadcasting with wireless information and power transfer"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "power efficient and secure multiuser communication systems with wireless information and power transfer"
    - "application of smart antenna technologies in 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)