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: "reliable physical layer network coding"
  Abstract: When two or more users in a wireless network transmit simultaneously, their electromagnetic signals are linearly superimposed on the channel. As a result, a receiver that is interested in one of these signals sees the others as unwanted interference. This property of the wireless medium is typically viewed as a hindrance to reliable communication over a network. However, using a recently developed coding strategy, interference can in fact be harnessed for network coding. In a wired network, (linear) network coding refers to each intermediate node taking its received packets, computing a linear combination over a finite field, and forwarding the outcome towards the destinations. Then, given an appropriate set of linear combinations, a destination can solve for its desired packets. For certain topologies, this strategy can attain significantly higher throughputs over routing-based strategies. Reliable physical layer network coding takes this idea one step further: using judiciously chosen linear error-correcting codes, intermediate nodes in a wireless network can directly recover linear combinations of the packets from the observed noisy superpositions of transmitted signals. Starting with some simple examples, this survey explores the core ideas behind this new technique and the possibilities it offers for communication over interference-limited wireless networks.

Connected through hyperedge HE-1 (induced by source paper "towards massive connectivity support for scalable mmtc communications in 5g networks"):
  with members:
    - "a random access protocol for pilot allocation in crowded massive mimo systems"
    - "compressive coded random access for massive mtc traffic in 5g systems"
    - "reliable and efficient access for alarm initiated and regular m2m traffic in ieee 802 11ah systems"
    - "massive machine type communication mmtc access with integrated authentication"
    - "reliable recovery of hierarchically sparse signals and application in machine type communications"
    - "pulse shaped ofdm for 5g systems"
    - "coded pilot access a random access solution for massive mimo systems"
    - "random access for massive mimo systems with intra cell pilot contamination"

Connected through hyperedge HE-2 (induced by source paper "wirelessly powered data aggregation for iot via over the air functional computation beamforming and power control"):
  with members:
    - "inference from randomized transmissions by many backscatter sensors"
    - "over the air function computation in sensor networks"
    - "communications and signals design for wireless power transmission"
    - "resource allocation in wireless powered relay networks a bargaining game approach"
    - "wireless powered communication opportunities and challenges"
    - "throughput optimization for massive mimo systems powered by wireless energy transfer"
    - "energy harvesting for physical layer security in ofdma networks"
    - "simultaneous wireless information and power transfer under different csi acquisition schemes"

Connected through hyperedge HE-3 (induced by source paper "capacity of the gaussian two pair two way relay channel to within 1 2 bit"):
  with members:
    - "optimal dof region for the asymmetric two pair mimo two way relay channel"
    - "expanding the compute and forward framework unequal powers signal levels and multiple linear combinations"
    - "cyclic communication and the inseparability of mimo multi way relay channels"
    - "mimo multiway relaying with clustered full data exchange signal space alignment and degrees of freedom"
    - "degrees of freedom for the mimo multi way relay channel"
    - "the degrees of freedom of the mimo y channel"
    - "divide and conquer approaching the capacity of the two pair bidirectional gaussian relay network"
    - "on the equal rate capacity of the awgn multiway relay channel"

Connected through hyperedge HE-4 (induced by source paper "practical power balanced non orthogonal multiple access"):
  with members:
    - "power domain non orthogonal multiple access noma in 5g systems potentials and challenges"
    - "dynamic user clustering and power allocation for uplink and downlink non orthogonal multiple access noma systems"
    - "network coded multiple access with high order modulations"
    - "coded random access applying codes on graphs to design random access protocols"
    - "network coded multiple access"
    - "random access with physical layer network coding"

Connected through hyperedge HE-5 (induced by source paper "physical layer network coding with multiple antennas an enabling technology for smart cities"):
  with members:
    - "complex linear physical layer network coding"
    - "an algebraic approach to physical layer network coding"
    - "random access with physical layer network coding"
    - "physical layer network coding tutorial survey and beyond"

Connected through hyperedge HE-6 (induced by source paper "asynchronous physical layer network coding symbol misalignment estimation and its effect on decoding"):
  with members:
    - "asynchronous physical layer network coding"
    - "joint ldpc and physical layer network coding for asynchronous bi directional relaying"
    - "physical layer network coding tutorial survey and beyond"

Connected through hyperedge HE-7 (induced by source paper "user activity detection via group testing and coded computation"):
  with members:
    - "on or many access channels"
    - "robust nonnegative sparse recovery and the nullspace property of 0 1 measurements"

Connected through hyperedge HE-8 (induced by source paper "expanding the compute and forward framework unequal powers signal levels and multiple linear combinations"):
  with members:
    - "an achievable rate region for the three user interference channel based on coset codes"
    - "a joint typicality approach to algebraic network information theory"
    - "secure compute and forward in a bidirectional relay"
    - "secure degrees of freedom of one hop wireless networks"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "multiple access via compute and forward"
    - "lattices over eisenstein integers for compute and forward"
    - "uplink downlink duality for integer forcing"

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)