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: "performance characterization of relay assisted wireless optical cdma networks in turbulent underwater channel"
  Abstract: In this paper, we characterize the performance of relay-assisted underwater wireless optical code division multiple access (OCDMA) networks over turbulent channels. In addition to scattering and absorption effects of underwater channels, we also consider optical turbulence as a log-normal fading coefficient in our analysis. To simultaneously and asynchronously share medium among many users, we assign a unique optical orthogonal code (OOC) to each user in order to actualize OCDMA-based underwater network. The most significant challenge in underwater optical communication is in the ability to extend the short range of its coverage. In order to expand the viable communication range, we consider multi-hop transmission to the destination. Moreover, we evaluate the performance of a relay-assisted point-to-point UWOC system as a special case of the proposed relay-assisted OCDMA network. Our numerical results indicate significant performance improvement by employing intermediate relays, e.g., one can achieve $32$ {dB} improvement in the bit error rate (BER) of $10^{-6}$ using only a dual-hop transmission in a $90$ {m} point-to-point clear ocean link.

Connected through hyperedge HE-1 (induced by source paper "opportunistic routing for opto acoustic internet of underwater things"):
  with members:
    - "a software defined opto acoustic network architecture for internet of underwater things"
    - "end to end performance analysis of underwater optical wireless relaying and routing techniques under location uncertainty"
    - "underwater optical wireless communications networking and localization a survey"

Connected through hyperedge HE-2 (induced by source paper "end to end performance analysis of underwater optical wireless relaying and routing techniques under location uncertainty"):
  with members:
    - "underwater optical wireless communications networking and localization a survey"
    - "performance analysis of connectivity and localization in multi hop underwater optical wireless sensor networks"
    - "visualizing sensor network coverage with location uncertainty"
    - "optimal multicasting in hybrid rf fso dtns"

Connected through hyperedge HE-3 (induced by source paper "underwater optical wireless communications networking and localization a survey"):
  with members:
    - "end to end performance analysis of underwater optical wireless relaying and routing techniques under location uncertainty"
    - "performance analysis of connectivity and localization in multi hop underwater optical wireless sensor networks"
    - "communicating using spatial mode multiplexing potentials challenges and perspectives"
    - "on distributed routing in underwater optical wireless sensor networks"
    - "non orthogonal multiple access for visible light communications"
    - "software defined optical networks sdons a comprehensive survey"
    - "connectivity scaling laws in wireless networks"
    - "extremal properties of three dimensional sensor networks with applications"

Connected through hyperedge HE-4 (induced by source paper "statistical studies of fading in underwater wireless optical channels in the presence of air bubble temperature and salinity random variations long version"):
  with members:
    - "mimo underwater visible light communications comprehensive channel study performance analysis and multiple symbol detection"
    - "statistical distribution of intensity fluctuations for underwater wireless optical channels in the presence of air bubbles"
    - "on the ber of multiple input multiple output underwater wireless optical communication systems"

Connected through hyperedge HE-5 (induced by source paper "mimo underwater visible light communications comprehensive channel study performance analysis and multiple symbol detection"):
  with members:
    - "statistical distribution of intensity fluctuations for underwater wireless optical channels in the presence of air bubbles"
    - "on the ber of multiple input multiple output underwater wireless optical communication systems"

Connected through hyperedge HE-6 (induced by source paper "statistical distribution of intensity fluctuations for underwater wireless optical channels in the presence of air bubbles"):
  with members:
    - "cellular underwater wireless optical cdma network potentials and challenges"
    - "performance analysis of multi hop underwater wireless optical communication systems extended version"
    - "performance studies of underwater wireless optical communication systems with spatial diversity mimo scheme"
    - "on the ber of multiple input multiple output underwater wireless optical communication systems"

Connected through hyperedge HE-7 (induced by source paper "performance analysis of multi hop underwater wireless optical communication systems extended version"):
  with members:
    - "cellular underwater wireless optical cdma network potentials and challenges"
    - "performance studies of underwater wireless optical communication systems with spatial diversity mimo scheme"
    - "on the ber of multiple input multiple output underwater wireless optical communication systems"

Connected through hyperedge HE-8 (induced by source paper "cellular underwater wireless optical cdma network potentials and challenges"):
  with members:
    - "on the ber of multiple input multiple output underwater wireless optical communication systems"
    - "adaptive mode selection and power allocation in bidirectional buffer aided relay networks"

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)