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: "timely updates in energy harvesting two hop networks offline and online policies"
  Abstract: A two-hop energy harvesting communication network is considered, in which measurement updates are transmitted by a source to a destination through an intermediate relay. Updates are to be sent in a  timely  fashion that minimizes the  age of information , defined as the time elapsed since the most recent update at the destination was generated at the source. The source and the relay communicate using energy harvested from nature, which is stored in infinite-sized batteries. Both nodes use fixed transmission rates, and hence updates incur fixed delays (service times). Two problems are formulated: an  offline  problem, in which the energy arrival information is known a priori, and an  online  problem, in which such information is revealed casually over time. In both problems, it is shown that it is optimal to transmit updates from the source  just in time  as the relay is ready to forward them to the destination, making the source and the relay act as one combined node. A recurring theme in the optimal policy is that updates should be as  uniformly  spread out over time as possible, subject to energy causality and service time constraints. This is perfectly achieved in the offline setting, and is achieved almost surely in the online setting by a best effort policy.

Connected through hyperedge HE-1 (induced by source paper "optimizing information freshness in wireless networks a stochastic geometry approach"):
  with members:
    - "age optimal updates of multiple information flows"
    - "delay analysis of random scheduling and round robin in small cell networks"
    - "optimizing information freshness in wireless networks under general interference constraints"
    - "optimizing age of information in wireless networks with perfect channel state information"
    - "age minimal transmission for energy harvesting sensors with finite batteries online policies"
    - "optimal status update for age of information minimization with an energy harvesting source"
    - "cell edge aware precoding for downlink massive mimo cellular networks"
    - "age optimal information updates in multihop networks"

Connected through hyperedge HE-2 (induced by source paper "age oriented opportunistic relaying in cooperative status update systems with stochastic arrivals"):
  with members:
    - "minimizing the age of information of cognitive radio based iot systems under a collision constraint"
    - "minimizing age of information for real time monitoring in resource constrained industrial iot networks"
    - "the age of updates in a simple relay network"
    - "average age of information with hybrid arq under a resource constraint"
    - "update or wait how to keep your data fresh"
    - "on the age of information in status update systems with packet management"

Connected through hyperedge HE-3 (induced by source paper "how to price fresh data"):
  with members:
    - "economics of age of information management under network externalities"
    - "dynamic pricing for controlling age of information"
    - "a dynamic jamming game for real time status updates"
    - "joint status sampling and updating for minimizing age of information in the internet of things"
    - "optimizing information freshness in wireless networks under general interference constraints"
    - "on the role of age of information in internet of things"
    - "age minimal transmission for energy harvesting sensors with finite batteries online policies"
    - "optimal status update for age of information minimization with an energy harvesting source"

Connected through hyperedge HE-4 (induced by source paper "a reinforcement learning framework for optimizing age of information in rf powered communication systems"):
  with members:
    - "average peak age of information minimization in uav assisted iot networks"
    - "age optimal trajectory planning for uav assisted data collection"
    - "ultra reliable low latency vehicular networks taming the age of information tail"
    - "sending information through status updates"
    - "optimal status update for age of information minimization with an energy harvesting source"
    - "timely updates over an erasure channel"
    - "age and value of information non linear age case"
    - "update or wait how to keep your data fresh"

Connected through hyperedge HE-5 (induced by source paper "energy harvesting powered sensing in iot timeliness versus distortion"):
  with members:
    - "distributed sensing with orthogonal multiple access to code or not to code"
    - "scheduling status updates to minimize age of information with an energy harvesting sensor"
    - "optimal status update for age of information minimization with an energy harvesting source"
    - "optimal power control for transmitting correlated sources with energy harvesting constraints"
    - "uplink age of information of unilaterally powered two way data exchanging systems"
    - "energy harvesting wireless communications a review of recent advances"
    - "delay limited source and channel coding of quasi stationary sources over block fading channels design and scaling laws"

Connected through hyperedge HE-6 (induced by source paper "age of information performance of multiaccess strategies with packet management"):
  with members:
    - "a general formula for the stationary distribution of the age of information and its application to single server queues"
    - "minimizing the age of information noma or oma"
    - "average peak age of information minimization in uav assisted iot networks"
    - "age of information in multicast networks with multiple update streams"
    - "age of information in a multiple access channel with heterogeneous traffic and an energy harvesting node"
    - "age of information in a network of preemptive servers"
    - "scheduling policies for minimizing age of information in broadcast wireless networks"
    - "the age of information in networks moments distributions and sampling"

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)