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: "relay subset selection in wireless networks using partial decode and forward transmission"
  Abstract: This paper considers the problem of selecting a subset of nodes in a two-hop wireless network to act as relays in aiding the communication between the source-destination pair. Optimal relay subset selection with the objective of maximizing the overall throughput is a difficult problem that depends on multiple factors including node locations, queue lengths and power consumption. A partial decode-and-forward strategy is applied in this paper to improve the tractability of the relay selection problem and performance of the overall network. #R##N#Note that the number of relays selected ultimately determines the performance of the network. This paper benchmarks this performance by determining the net diversity achieved using the relays selected and the partial decode-and-forward strategy. This framework is subsequently used to further transform relay selection into a simpler relay placement problem, and two proximity-based approximation algorithms are developed to determine the appropriate set of relays to be selected in the network. Other selection strategies such as random relay selection and a greedy algorithm that relies on channel state information are also presented. This paper concludes by showing that the proposed proximity-based relay selection strategies yield near-optimal expected rates for a small number of selected relays.

Connected through hyperedge HE-1 (induced by source paper "generalized optimal two way relays subsets pairings in cloud based region cognitive networks"):
  with members:
    - "non orthogonal multiple access for cooperative communications challenges opportunities and trends"
    - "cognitive non orthogonal multiple access with cooperative relaying a new wireless frontier for 5g spectrum sharing"
    - "resource allocation and outage analysis for an adaptive cognitive two way relay network"
    - "cooperation in 5g hetnets advanced spectrum access and d2d assisted communications"
    - "performance of adaptive link selection with buffer aided relays in underlay cognitive networks"
    - "optimal relay selection for the parallel hybrid rf fso relay channel non buffer aided and buffer aided designs"
    - "separation framework an enabler for cooperative and d2d communication for future 5g networks"

Connected through hyperedge HE-2 (induced by source paper "consistent sensor relay and link selection in wireless sensor networks"):
  with members:
    - "a class of prediction correction methods for time varying convex optimization"
    - "qos constrained optimal sink and relay placement in planned wireless sensor networks"
    - "near optimal sensor placement for linear inverse problems"
    - "sparsity promoting sensor selection for non linear measurement models"

Connected through hyperedge HE-3 (induced by source paper "consistency in the face of change an adaptive approach to physical layer cooperation"):
  with members:
    - "airsync enabling distributed multiuser mimo with full spatial multiplexing"
    - "wireless network information flow a deterministic approach"
    - "design implementation and characterization of a cooperative communications system"

Connected through hyperedge HE-4 (induced by source paper "near optimal modulo and forward scheme for the untrusted relay channel"):
  with members:
    - "secure communication via an untrusted non regenerative relay in fading channels"
    - "achieving the secrecy capacity of wiretap channels using polar codes"
    - "nested polar codes for wiretap and relay channels"
    - "channel coding and decoding in a relay system operated with physical layer network coding"
    - "on the throughput of secure hybrid arq protocols for gaussian block fading channels"
    - "providing secrecy with lattice codes"
    - "generalized degrees of freedom of the symmetric gaussian k user interference channel"
    - "physical layer network coding"

Connected through hyperedge HE-5 (induced by source paper "sub modularity and antenna selection in mimo systems"):
  with members:
    - "massive mimo how many antennas do we need"
    - "nonregenerative mimo relaying with optimal transmit antenna selection"
    - "a simple cooperative diversity method based on network path selection"

Connected through hyperedge HE-6 (induced by source paper "splitting algorithms for fast relay selection generalizations analysis and a unified view"):
  with members:
    - "the impact of channel feedback on opportunistic relay selection for hybrid arq in wireless networks"
    - "a simple cooperative diversity method based on network path selection"

Connected through hyperedge HE-7 (induced by source paper "end to end joint antenna selection strategy and distributed compress and forward strategy for relay channels"):
  with members:
    - "to code or not to code in multi hop relay channels"
    - "dmt of multi hop cooperative networks part ii half duplex networks with full duplex performance"
    - "nonregenerative mimo relaying with optimal transmit antenna selection"
    - "diversity of mimo multihop relay channels"
    - "a simple cooperative diversity method based on network path selection"
    - "optimal space time codes for the mimo amplify and forward cooperative channel"

Connected through hyperedge HE-8 (induced by source paper "to code or not to code in multi hop relay channels"):
  with members:
    - "multi hop cooperative wireless networks diversity multiplexing tradeoff and optimal code design"
    - "diversity of mimo multihop relay channels"
    - "performance bounds for bi directional coded cooperation protocols"
    - "a simple cooperative diversity method based on network path selection"
    - "optimal space time codes for the mimo amplify and forward cooperative channel"
    - "approximately universal codes over slow fading channels"

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)