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 cooperation in cellular networks with renewable powered base stations"
  Abstract: In this paper, we propose a model for energy cooperation between cellular base stations (BSs) with individual hybrid power supplies (including both the conventional grid and renewable energy sources), limited energy storages, and connected by resistive power lines for energy sharing. When the renewable energy profile and energy demand profile at all BSs are deterministic or known ahead of time, we show that the optimal energy cooperation policy for the BSs can be found by solving a linear program. We show the benefits of energy cooperation in this regime. When the renewable energy and demand profiles are stochastic and only causally known at the BSs, we propose an online energy cooperation algorithm and show the optimality properties of this algorithm under certain conditions. Furthermore, the energy-saving performances of the developed offline and online algorithms are compared by simulations, and the effect of the availability of energy state information (ESI) on the performance gains of the BSs' energy cooperation is investigated. Finally, we propose a hybrid algorithm that can incorporate offline information about the energy profiles, but operates in an online manner.

Connected through hyperedge HE-1 (induced by source paper "energy sustainable paradigms and methods for future mobile networks a survey"):
  with members:
    - "information exchange in randomly deployed dense wsns with wireless energy harvesting capabilities"
    - "a stochastic geometry based demand response management framework for cellular networks powered by smart grid"
    - "fog computing based radio access networks issues and challenges"
    - "a hybrid energy sharing framework for green cellular networks"
    - "recent advances in cloud radio access networks system architectures key techniques and open issues"
    - "green networking in cellular hetnets a unified radio resource management framework with base station on off switching"
    - "online ski rental for on off scheduling of energy harvesting base stations"
    - "dynamic clustering and on off strategies for wireless small cell networks"

Connected through hyperedge HE-2 (induced by source paper "dynamic network slicing for scalable fog computing systems with energy harvesting"):
  with members:
    - "distributed optimization for energy efficient fog computing in the tactile internet"
    - "computing resource allocation in three tier iot fog networks a joint optimization approach combining stackelberg game and matching"
    - "sdfog a software defined computing architecture for qos aware service orchestration over edge devices"
    - "response time optimized distributed cloud resource allocation"
    - "fog computing principles architectures and applications"
    - "from network sharing to multi tenancy the 5g network slice broker"
    - "network slicing games enabling customization in multi tenant networks"
    - "spatial spectrum and energy efficiency of random cellular networks"

Connected through hyperedge HE-3 (induced by source paper "time complexity analysis of a distributed stochastic optimization in a non stationary environment"):
  with members:
    - "a qos aware scheduling algorithm for high speed railway communication system"
    - "energy efficient resource management in ultra dense small cell networks a mean field approach"
    - "optimal power cost management using stored energy in data centers"

Connected through hyperedge HE-4 (induced by source paper "energy sustainable traffic steering for 5g mobile networks"):
  with members:
    - "fundamentals of heterogeneous cellular networks with energy harvesting"

Connected through hyperedge HE-5 (induced by source paper "joint energy bandwidth allocation for multi user channels with cooperating hybrid energy nodes"):
  with members:
    - "iterative dynamic water filling for fading multiple access channels with energy harvesting"
    - "comp meets smart grid a new communication and energy cooperation paradigm"
    - "joint energy and spectrum cooperation for cellular communication systems"
    - "energy cooperation in energy harvesting communications"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "optimal power allocation for energy harvesting and power grid coexisting wireless communication systems"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "decentralized delay optimal control for interference networks with limited renewable energy storage"

Connected through hyperedge HE-6 (induced by source paper "optimal energy and data routing in networks with energy cooperation"):
  with members:
    - "joint energy and spectrum cooperation for cellular communication systems"
    - "cost aware green cellular networks with energy and communication cooperation"
    - "application of smart antenna technologies in simultaneous wireless information and power transfer"
    - "energy cooperation in energy harvesting communications"
    - "wireless information and power transfer architecture design and rate energy tradeoff"
    - "enabling wireless power transfer in cellular networks architecture modeling and deployment"
    - "optimal energy allocation for wireless communications with energy harvesting constraints"
    - "transmission with energy harvesting nodes in fading wireless channels optimal policies"

Connected through hyperedge HE-7 (induced by source paper "energy group buying with loading sharing for green cellular networks"):
  with members:
    - "green 5g heterogeneous networks through dynamic small cell operation"
    - "comp meets smart grid a new communication and energy cooperation paradigm"
    - "bargaining based mobile data offloading"
    - "what will 5g be"
    - "joint energy and spectrum cooperation for cellular communication systems"
    - "cost aware green cellular networks with energy and communication cooperation"
    - "cooperative energy trading in comp systems powered by smart grids"
    - "green cellular networks a survey some research issues and challenges"

Connected through hyperedge HE-8 (induced by source paper "networked mimo with fractional joint transmission in energy harvesting systems"):
  with members:
    - "comp meets smart grid a new communication and energy cooperation paradigm"
    - "energy cooperation in energy harvesting communications"
    - "optimal power allocation for energy harvesting and power grid coexisting wireless communication systems"
    - "broadcasting with an energy harvesting rechargeable transmitter"
    - "sum rate optimal power policies for energy harvesting transmitters in an interference channel"
    - "transmission with energy harvesting nodes in fading wireless channels optimal policies"
    - "optimal multiuser zero forcing with per antenna power constraints for network mimo coordination"
    - "networked mimo with clustered linear precoding"

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)