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: "distributed mac protocol for cognitive radio networks design analysis and optimization"
  Abstract: In this paper, we investigate the joint optimal sensing and distributed Medium Access Control (MAC) protocol design problem for cognitive radio (CR) networks. We consider both scenarios with single and multiple channels. For each scenario, we design a synchronized MAC protocol for dynamic spectrum sharing among multiple secondary users (SUs), which incorporates spectrum sensing for protecting active primary users (PUs). We perform saturation throughput analysis for the corresponding proposed MAC protocols that explicitly capture the spectrum-sensing performance. Then, we find their optimal configuration by formulating throughput maximization problems subject to detection probability constraints for PUs. In particular, the optimal solution of the optimization problem returns the required sensing time for PUs' protection and optimal contention window to maximize the total throughput of the secondary network. Finally, numerical results are presented to illustrate developed theoretical findings in this paper and significant performance gains of the optimal sensing and protocol configuration.

Connected through hyperedge HE-1 (induced by source paper "power allocation for full duplex relay selection in underlay cognitive radio networks coherent versus non coherent scenarios"):
  with members:
    - "power control and relay selection in full duplex cognitive relay networks coherent versus non coherent scenarios"
    - "distributed mac protocol design for full duplex cognitive radio networks"
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "widely linear digital self interference cancellation in direct conversion full duplex transceiver"
    - "in band full duplex wireless challenges and opportunities"
    - "experiment driven characterization of full duplex wireless systems"
    - "full duplex bidirectional mimo achievable rates under limited dynamic range"

Connected through hyperedge HE-2 (induced by source paper "power control and relay selection in full duplex cognitive relay networks coherent versus non coherent scenarios"):
  with members:
    - "design and optimal configuration of full duplex mac protocol for cognitive radio networks considering self interference"
    - "distributed mac protocol design for full duplex cognitive radio networks"

Connected through hyperedge HE-3 (induced by source paper "multi channel mac protocol for full duplex cognitive radio networks with optimized access control and load balancing"):
  with members:
    - "channel assignment with access contention resolution for cognitive radio networks"
    - "experiment driven characterization of full duplex wireless systems"
    - "performance of joint spectrum sensing and mac algorithms for multichannel opportunistic spectrum access ad hoc networks"

Connected through hyperedge HE-4 (induced by source paper "design and optimal configuration of full duplex mac protocol for cognitive radio networks considering self interference"):
  with members:
    - "distributed mac protocol design for full duplex cognitive radio networks"
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "joint cooperative spectrum sensing and mac protocol design for multi channel cognitive radio networks"
    - "widely linear digital self interference cancellation in direct conversion full duplex transceiver"
    - "design and characterization of a full duplex multiantenna system for wifi networks"
    - "full duplex cooperative cognitive radio with transmit imperfections"
    - "in band full duplex wireless challenges and opportunities"
    - "channel assignment with access contention resolution for cognitive radio networks"

Connected through hyperedge HE-5 (induced by source paper "distributed mac protocol design for full duplex cognitive radio networks"):
  with members:
    - "channel assignment with access contention resolution for cognitive radio networks"
    - "experiment driven characterization of full duplex wireless systems"

Connected through hyperedge HE-6 (induced by source paper "joint cooperative spectrum sensing and mac protocol design for multi channel cognitive radio networks"):
  with members:
    - "channel assignment with access contention resolution for cognitive radio networks"
    - "performance of joint spectrum sensing and mac algorithms for multichannel opportunistic spectrum access ad hoc networks"

Connected through hyperedge HE-7 (induced by source paper "general analytical framework for cooperative sensing and access trade off optimization"):
  with members:
    - "channel assignment with access contention resolution for cognitive radio networks"
    - "performance of joint spectrum sensing and mac algorithms for multichannel opportunistic spectrum access ad hoc networks"

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)