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: "joint power allocation for energy harvesting and power superposition coding in cooperative spectrum sharing"
  Abstract: In this paper, a decode-and-forward type cooperative spectrum sharing scheme exploiting energy harvesting and power superposition coding is proposed. The secondary transmitter (ST) acting as a relay harvests energy in the first phase of every two phases from the radio frequency signal transmitted by the primary transmitter (PT) of the primary network (PN) and uses it in the second phase for transmitting power superposed codes of primary signal of the PN and secrecy signal of the secondary network (SN). The ST splits the received primary signal with adjustable power splitting ratio for decoding the primary signal and charging the battery. The harvested energy in addition to internal energy from the battery of the ST is used for power superposition coding with variable power sharing coefficient. Our main concern here is to know the impact of the two power parameters on outage performances (probabilities) of the PN and the SN. Impact of the other system parameters on outage performances is also considered to provide more comprehensive view of system operation. Analytical or mathematical expressions of the outage probabilities of the PN and the SN are derived in terms of the power parameters, location of the ST, channel gain, and other system related parameters. Jointly optimal power splitting ratio and power sharing coefficient achieving target outage probabilities of the PN and the SN are found from the expressions.

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)