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: "opportunistic scheduling for full duplex uplink downlink networks"
  Abstract: We study opportunistic scheduling and the sum capacity of cellular networks with a full-duplex multi-antenna base station and a large number of single-antenna half-duplex users. Simultaneous uplink and downlink over the same band results in uplink-to-downlink interference, degrading performance. We present a simple opportunistic joint uplink-downlink scheduling algorithm that exploits multiuser diversity and treats interference as noise. We show that in homogeneous networks, our algorithm achieves the same sum capacity as what would have been achieved if there was no uplink-to-downlink interference, asymptotically in the number of users. The algorithm does not require interference CSI at the base station or uplink users. It is also shown that for a simple class of heterogeneous networks without sufficient channel diversity, it is not possible to achieve the corresponding interference-free system capacity. We discuss the potential for using device-to-device side-channels to overcome this limitation in heterogeneous networks.

Connected through hyperedge HE-1 (induced by source paper "capacity limits of full duplex cellular network"):
  with members:
    - "resource allocation and rate gains in practical full duplex systems"
    - "fundamental limits of spectrum sharing full duplex multicell networks"
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "in band full duplex wireless challenges and opportunities"
    - "feedback capacity of the gaussian interference channel to within 2 bits"
    - "bilayer low density parity check codes for decode and forward in relay channels"
    - "gaussian interference channel capacity to within one bit"
    - "rate regions for relay broadcast channels"

Connected through hyperedge HE-2 (induced by source paper "on the feasibility of full duplex large scale mimo cellular systems"):
  with members:
    - "full duplex cloud radio access network stochastic design and analysis"
    - "multi cell massive mimo beamforming in assuring qos for large numbers of users"
    - "compact full duplex mimo radios in d2d underlaid cellular networks from system design to prototype results"
    - "massive mimo ten myths and one critical question"
    - "performance analysis of massive mimo for cell boundary users"
    - "prototyping real time full duplex radios"
    - "compressed channel feedback for correlated massive mimo systems"
    - "performance analysis of self interference cancellation methods in full duplex large scale mimo systems"

Connected through hyperedge HE-3 (induced by source paper "large antenna analysis of multi cell full duplex networks"):
  with members:
    - "5g cellular key enabling technologies and research challenges"
    - "degrees of freedom of full duplex multiantenna cellular networks"
    - "leveraging one hop information in massive mimo full duplex wireless systems"
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "massive mimo for next generation wireless systems"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "simultaneous transmission and reception algorithm design and system level performance"
    - "scaling up mimo opportunities and challenges with very large arrays"

Connected through hyperedge HE-4 (induced by source paper "softnull many antenna full duplex wireless via digital beamforming"):
  with members:
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "massive mimo for next generation wireless systems"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "massive mu mimo downlink tdd systems with linear precoding and downlink pilots"
    - "scaling up mimo opportunities and challenges with very large arrays"
    - "effects of channel aging in massive mimo systems"
    - "in band full duplex wireless challenges and opportunities"
    - "understanding the impact of phase noise on active cancellation in wireless full duplex"

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)