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: "ns 3 implementation of the 3gpp mimo channel model for frequency spectrum above 6 ghz"
  Abstract: Communications at mmWave frequencies will be a key enabler for the next generation of cellular networks, due to the multi-Gbps rate that can be achieved. However, before this technology can be widely adopted, there are still several problems that must be solved, primarily associated with the interplay between the variability of mmWave links and the complexity of mobile networks. An end-to-end network simulator represents a great tool to assess the performance of any proposed solution to meet the stringent 5G requirements. Given the criticality of channel propagation characteristics at higher frequencies, it is of fundamental importance to properly simulate detailed propagation behaviors. Towards this goal, in this paper we present our implementation of the 3GPP channel model for the 6-100 GHz band for the ns--3 end-to-end 5G mmWave module, and detail its associated MIMO beamforming architecture.

Connected through hyperedge HE-1 (induced by source paper "implementation of a spatial channel model for ns 3"):
  with members:
    - "nr u and wigig coexistence in 60 ghz bands"
    - "new radio physical layer abstraction for system level simulations of 5g networks"
    - "scalable and accurate modeling of the millimeter wave channel"
    - "end to end simulation of 5g mmwave networks"
    - "ieee 802 11ay based mmwave wlans design challenges and solutions"
    - "multi sector and multi panel performance in 5g mmwave cellular networks"
    - "impact of channel models on the end to end performance of mmwave cellular networks"
    - "modeling and analyzing millimeter wave cellular systems"

Connected through hyperedge HE-2 (induced by source paper "spatially stationary model for holographic mimo small scale fading"):
  with members:
    - "degrees of freedom of holographic mimo channels"
    - "beyond massive mimo the potential of data transmission with large intelligent surfaces"
    - "massive mimo has unlimited capacity"
    - "optimal pilot and payload power control in single cell massive mimo systems"
    - "a generalized spatial correlation model for 3d mimo channels based on the fourier coefficients of power spectrums"
    - "on landau s eigenvalue theorem and information cut sets"
    - "optimal design of energy efficient multi user mimo systems is massive mimo the answer"
    - "energy and spectral efficiency of very large multiuser mimo systems"

Connected through hyperedge HE-3 (induced by source paper "implementation of reference public safety scenarios in ns 3"):
  with members:
    - "end to end simulation of 5g mmwave networks"
    - "end to end simulation of integrated access and backhaul at mmwaves"
    - "the sky is not the limit lte for unmanned aerial vehicles"
    - "improved handover through dual connectivity in 5g mmwave mobile networks"
    - "a survey on legacy and emerging technologies for public safety communications"
    - "millimeter wave cellular wireless networks potentials and challenges"

Connected through hyperedge HE-4 (induced by source paper "end to end simulation of 5g mmwave networks"):
  with members:
    - "integration of carrier aggregation and dual connectivity for the ns 3 mmwave module"
    - "x tcp a cross layer approach for tcp uplink flows in mmwave networks"
    - "enhancing tcp end to end performance in millimeter wave communications"
    - "beam alignment for millimetre wave links with motion prediction of autonomous vehicles"
    - "tcp in 5g mmwave networks link level retransmissions and mp tcp"
    - "provisioning low latency resilient mobile edge clouds for 5g"
    - "caching meets millimeter wave communications for enhanced mobility management in 5g networks"
    - "reliable video streaming over mmwave with multi connectivity and network coding"

Connected through hyperedge HE-5 (induced by source paper "impact of channel models on the end to end performance of mmwave cellular networks"):
  with members:
    - "study of realistic antenna patterns in 5g mmwave cellular scenarios"
    - "end to end simulation of 5g mmwave networks"
    - "modeling and analyzing millimeter wave cellular systems"
    - "improved handover through dual connectivity in 5g mmwave mobile networks"
    - "overview of millimeter wave communications for fifth generation 5g wireless networks with a focus on propagation models"
    - "rapid fading due to human blockage in pedestrian crowds at 5g millimeter wave frequencies"
    - "transport layer performance in 5g mmwave cellular"
    - "tractable resource management with uplink decoupled millimeter wave overlay in ultra dense cellular networks"

Connected through hyperedge HE-6 (induced by source paper "integration of carrier aggregation and dual connectivity for the ns 3 mmwave module"):
  with members:
    - "statistical blockage modeling and robustness of beamforming in millimeter wave systems"
    - "end to end simulation of 5g mmwave networks"
    - "tcp in 5g mmwave networks link level retransmissions and mp tcp"
    - "reliable video streaming over mmwave with multi connectivity and network coding"
    - "improved handover through dual connectivity in 5g mmwave mobile networks"
    - "base station diversity propagation measurements at 73 ghz millimeter wave for 5g coordinated multipoint comp analysis"
    - "performance comparison of dual connectivity and hard handover for lte 5g tight integration"
    - "a framework for end to end evaluation of 5g mmwave cellular networks in ns 3"

Connected through hyperedge HE-7 (induced by source paper "multi sector and multi panel performance in 5g mmwave cellular networks"):
  with members:
    - "study of realistic antenna patterns in 5g mmwave cellular scenarios"
    - "end to end simulation of 5g mmwave networks"
    - "tcp in 5g mmwave networks link level retransmissions and mp tcp"
    - "improved handover through dual connectivity in 5g mmwave mobile networks"
    - "5g cellular user equipment from theory to practical hardware design"
    - "performance comparison of dual connectivity and hard handover for lte 5g tight integration"
    - "understanding noise and interference regimes in 5g millimeter wave cellular networks"
    - "millimeter wave cellular wireless networks potentials and challenges"

Connected through hyperedge HE-8 (induced by source paper "reliable video streaming over mmwave with multi connectivity and network coding"):
  with members:
    - "end to end simulation of 5g mmwave networks"
    - "improved handover through dual connectivity in 5g mmwave mobile networks"
    - "transport layer performance in 5g mmwave cellular"
    - "a framework for end to end evaluation of 5g mmwave cellular networks in ns 3"
    - "millimeter wave cellular wireless networks potentials and challenges"
    - "network coding meets multimedia a review"

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)