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 spectrum sharing for hybrid satellite terrestrial networks with large scale csi"
  Abstract: Satellites and terrestrial cellular networks can be integrated together for extended broadband coverage in e.g., maritime communication scenarios. The co-channel interference (CCI) is a challenging issue for spectrum sharing between satellites and terrestrial networks. Different from previous studies that adopt full channel state information (CSI) or CSI with Gaussian estimation errors for CCI mitigation, we consider a more practical case with only slowly-varying large-scale CSI to facilitate overhead reduction. A joint power and channel allocation scheme is proposed for the terrestrial system, under the constraint of leakage interference to satellite mobile terminals (MTs). The proposed scheme provides near-optimal performance according to both theoretical analysis and simulation results.

Connected through hyperedge HE-1 (induced by source paper "optimal beamforming for hybrid satellite terrestrial networks with nonlinear pa and imperfect csit"):
  with members:
    - "hybrid satellite terrestrial communication networks for the maritime internet of things key technologies opportunities and challenges"
    - "generic optimization of linear precoding in multibeam satellite systems"

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)