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: "on the achievable rates of pairwise multiway relay channels"
  Abstract: In this paper, we study the effect of users' transmission ordering on the common rate and sum rate of pairwise multiway relay channels (MWRCs) with functional-decode-forward strategy. To this end, we first develop a graphical model for the data transmission in a pairwise MWRC. Using this model, we then find the optimal orderings that achieve the maximum common rate and sum rate of the system. The achieved maximum common and sum rate are also found. Moreover, we show that the performance gap between optimal orderings and a random ordering vanishes when SNR increases. Computer simulations are presented for better illustration of the results.

Connected through hyperedge HE-1 (induced by source paper "maximizing data rate for multiway relay channels with pairwise transmission strategy"):
  with members:
    - "generalized signal alignment on the achievable dof for multi user mimo two way relay channels"
    - "a novel user pairing scheme for functional decode and forward multi way relay network"
    - "mimo multiway relaying with pairwise data exchange a degrees of freedom perspective"
    - "degrees of freedom for the mimo multi way relay channel"
    - "on the equal rate capacity of the awgn multiway relay channel"
    - "the capacity region of multiway relay channels over finite fields with full data exchange"
    - "an optimal coding strategy for the binary multi way relay channel"
    - "the multi way relay channel"

Connected through hyperedge HE-2 (induced by source paper "a novel user pairing scheme for functional decode and forward multi way relay network"):
  with members:
    - "optimal coding functions for pairwise message sharing on finite field multi way relay channels"
    - "symbol and bit mapping optimization for physical layer network coding with pulse amplitude modulation"
    - "error performance analysis of df and af multi way relay networks with bpsk modulation"
    - "on the equal rate capacity of the awgn multiway relay channel"
    - "asynchronous physical layer network coding"
    - "nested lattice codes for gaussian relay networks with interference"
    - "physical layer network coding tutorial survey and beyond"
    - "lattice codes for the gaussian relay channel decode and forward and compress and forward"

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)