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: "agile millimeter wave networks with provable guarantees"
  Abstract: There is much interest in integrating millimeter wave radios (mmWave) into wireless LANs and 5G cellular networks to benefit from their multiple GHz of available spectrum. Yet unlike existing technologies, e.g., WiFi, mmWave radios require highly directional antennas. Since the antennas have pencil-beams, the transmitter and receiver need to align their antenna beams before they can communicate. Existing solutions scan the entire space to find the best alignment. Such a process has been shown to introduce up to seconds of delay, and is unsuitable for wireless networks where an access point has to quickly switch between users and accommodate mobile clients. #R##N#This paper presents Rapid-Link, a new protocol that can find the best mmWave beam alignment without scanning the space. Given all possible directions for setting the antenna beam, Rapid-Link provably finds the optimal direction in logarithmic number of measurements. Further, Rapid-Link works within the existing 802.11ad standard for mmWave LAN, and can support both clients and access points. We have implemented Rapid-Link in a mmWave radio and evaluated it empirically. Our results show that it reduces beam alignment delay by orders of magnitude. In particular, for highly directional mmWave devices operating under 802.11ad, the delay drops from over a second to 2.5 ms.

Connected through hyperedge HE-1 (induced by source paper "association blockage and handoffs in ieee 802 11ad based 60 ghz picocells a closer look"):
  with members:
    - "performance analysis of ieee 802 11ad mac protocol"
    - "60 ghz outdoor urban measurement study of the feasibility of multi gbps mm wave cellular networks"
    - "tracking mm wave channel dynamics fast beam training strategies under mobility"
    - "60 ghz mac standardization progress and way forward"
    - "60 ghz multi gigabit indoor wlans dream or reality"

Connected through hyperedge HE-2 (induced by source paper "beam discovery using linear block codes for millimeter wave communication networks"):
  with members:
    - "millimeter wave mimo channel estimation based on adaptive compressed sensing"
    - "linear block coding for efficient beam discovery in millimeter wave communication networks"
    - "efficient beam alignment in millimeter wave systems using contextual bandits"
    - "a compressive channel estimation technique robust to synchronization impairments"
    - "millimeter wave mimo channel estimation using overlapped beam patterns and rate adaptation"
    - "an overview of signal processing techniques for millimeter wave mimo systems"
    - "low power analog to digital conversion in millimeter wave systems impact of resolution and bandwidth on performance"
    - "compressed sensing for wireless communications useful tips and tricks"

Connected through hyperedge HE-3 (induced by source paper "linear block coding for efficient beam discovery in millimeter wave communication networks"):
  with members:
    - "millimeter wave mimo channel estimation based on adaptive compressed sensing"
    - "a compressive channel estimation technique robust to synchronization impairments"
    - "millimeter wave mimo channel estimation using overlapped beam patterns and rate adaptation"
    - "an overview of signal processing techniques for millimeter wave mimo systems"
    - "low power analog to digital conversion in millimeter wave systems impact of resolution and bandwidth on performance"
    - "compressed sensing for wireless communications useful tips and tricks"
    - "compressed sensing based multi user millimeter wave systems how many measurements are needed"
    - "channel estimation and hybrid precoding for millimeter wave cellular systems"

Connected through hyperedge HE-4 (induced by source paper "efficient beam alignment in millimeter wave systems using contextual bandits"):
  with members:
    - "millimeter wave beam selection using out of band spatial information"
    - "energy efficient power and bandwidth allocation in an integrated sub 6 ghz millimeter wave system"
    - "coordinated initial access in millimetre wave standalone networks"
    - "unimodal thompson sampling for graph structured arms"
    - "unimodal bandits regret lower bounds and optimal algorithms"
    - "directional cell discovery in millimeter wave cellular networks"
    - "dynamic rate and channel selection in cognitive radio systems"
    - "optimal rate sampling in 802 11 systems"

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.NI(Networking and Internet Architecture)