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: "broadcast capacity region of two phase bidirectional relaying"
  Abstract: In a three-node network bidirectional communication between two nodes can be enabled by a half-duplex relay node with a decode-and-forward protocol. In the first phase, the messages of two nodes are transmitted to the relay node. In the second phase a re-encoded composition is broadcasted by the relay node. In this work the capacity region of the broadcast phase in terms of the maximal probability of error is determined. It is characterized by the mutual informations of the separate channels coupled by the common input.

Connected through hyperedge HE-1 (induced by source paper "on the dof of two way 2 2 2 relay networks with or without relay caching"):
  with members:
    - "fundamental limits of cache aided interference management"
    - "on the capacity regions of two way diamond channels"
    - "beyond one way communication degrees of freedom of multi way relay mimo interference networks"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "caching eliminates the wireless bottleneck in video aware wireless networks"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "nested lattice codes for gaussian two way relay channels"
    - "lattice coding for the two way two relay channel"

Connected through hyperedge HE-2 (induced by source paper "the dof of two way butterfly networks"):
  with members:
    - "sprout a functional caching approach to minimize service latency in erasure coded storage"
    - "on the capacity regions of two way diamond channels"
    - "beyond one way communication degrees of freedom of multi way relay mimo interference networks"
    - "real interference alignment exploiting the potential of single antenna systems"
    - "caching eliminates the wireless bottleneck in video aware wireless networks"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "nested lattice codes for gaussian two way relay channels"
    - "lattice coding for the two way two relay channel"

Connected through hyperedge HE-3 (induced by source paper "layered space time index coding"):
  with members:
    - "golden coded index coding"
    - "index codes for the gaussian broadcast channel using quadrature amplitude modulation"
    - "lattice index coding"
    - "index coded psk modulation"
    - "optimal coding schemes for the three receiver awgn broadcast channel with receiver message side information"
    - "lattice index codes from algebraic number fields"
    - "joint network and gelfand pinsker coding for 3 receiver gaussian broadcast channels with receiver message side information"
    - "fundamental limits of caching"

Connected through hyperedge HE-4 (induced by source paper "noisy broadcast networks with receiver caching"):
  with members:
    - "the exact rate memory tradeoff for caching with uncoded prefetching"
    - "on the optimality of separation between caching and delivery in general cache networks"
    - "opportunistic content delivery in fading broadcast channels"
    - "cache aided content delivery over erasure broadcast channels"
    - "scalable content delivery with coded caching in multi antenna fading channels"
    - "on coded caching in the overloaded miso broadcast channel"
    - "multi antenna coded caching"
    - "information theoretic caching the multi user case"

Connected through hyperedge HE-5 (induced by source paper "three way channels with multiple unicast sessions capacity approximation via network transformation"):
  with members:
    - "device relaying in cellular d2d networks a fairness perspective"
    - "a survey on device to device communication in cellular networks"
    - "mimo multiway relaying with pairwise data exchange a degrees of freedom perspective"
    - "the degrees of freedom of multi way device to device communications is limited by 2"
    - "approximate sum capacity of the y channel"
    - "degrees of freedom for the mimo multi way relay channel"
    - "the deterministic multicast capacity of 4 node relay networks"
    - "in band full duplex wireless challenges and opportunities"

Connected through hyperedge HE-6 (induced by source paper "half duplex or full duplex communications a capacity analysis under self interference"):
  with members:
    - "self interference in full duplex multi user mimo channels"
    - "half duplex or full duplex relaying a capacity analysis under self interference"
    - "in band full duplex wireless challenges and opportunities"
    - "experiment driven characterization of full duplex wireless systems"

Connected through hyperedge HE-7 (induced by source paper "on the capacity regions of two way diamond channels"):
  with members:
    - "on the symmetric k user interference channels with limited feedback"
    - "on the capacity and degrees of freedom regions of two user mimo interference channels with limited receiver cooperation"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "nested lattice codes for gaussian two way relay channels"
    - "lattice coding for the two way two relay channel"
    - "the gaussian two way diamond channel"
    - "on the capacity region and the generalized degrees of freedom region for the mimo interference channel with feedback"
    - "divide and conquer approaching the capacity of the two pair bidirectional gaussian relay network"

Connected through hyperedge HE-8 (induced by source paper "cyclic communication and the inseparability of mimo multi way relay channels"):
  with members:
    - "spectral and energy efficiency in 3 way relay channels with circular message exchanges"
    - "simultaneous diagonalization on the dof region of the k user mimo multi way relay channel"
    - "beyond one way communication degrees of freedom of multi way relay mimo interference networks"
    - "approximate sum capacity of the y channel"
    - "degrees of freedom for the mimo multi way relay channel"
    - "the deterministic multicast capacity of 4 node relay networks"
    - "the degrees of freedom of the mimo y channel"
    - "optimal transmit power allocation for mimo two way cognitive relay networks with multiple relays"

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)