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: "millimeter wave wireless communications new results for rural connectivity"
  Abstract: This paper shows the remarkable distances that can be achieved using millimeter wave communications, and presents a new rural macrocell (RMa) path loss model for millimeter wave frequencies, based on measurements at 73 GHz in rural Virginia. Path loss models are needed to estimate signal coverage and interference for wireless network design, yet little is known about rural propagation at millimeter waves. This work identifies problems with the RMa model used by the 3rd Generation Partnership Project (3GPP) TR 38.900 Release 14, and offers a close-in (CI) reference distance model that has improved accuracy, fewer parameters, and better stability as compared with the existing 3GPP RMa path loss model. The measurements and models presented here are the first to validate rural millimeter wave path loss models.

Connected through hyperedge HE-1 (induced by source paper "a key 6g challenge and opportunity connecting the remaining 4 billions a survey on rural connectivity"):
  with members:
    - "connecting the unconnected towards frugal 5g network architecture and standardization"
    - "5g new radio evolution meets satellite communications opportunities challenges and solutions"
    - "aeronautical ad hoc networking for the internet above the clouds"
    - "percolation for d2d networks on street systems"
    - "information and communications technologies for sustainable development goals state of the art needs and perspectives"
    - "sum rate analysis for high altitude platform hap drones with tethered balloon relay"
    - "optical communication in space challenges and mitigation techniques"
    - "feasibility architecture and cost considerations of using tvws for rural internet access in 5g"

Connected through hyperedge HE-2 (induced by source paper "a channel measurement campaign for mmwave communication in industrial settings"):
  with members:
    - "a square peg in a round hole the complex path for wireless in the manufacturing industry"

Connected through hyperedge HE-3 (induced by source paper "propagation measurement system and approach at 140 ghz moving to 6g and above 100 ghz"):
  with members:
    - "simulating motion incorporating spatial consistency into the nyusim channel model"
    - "millimeter wave extended nyusim channel model for spatial consistency"
    - "verification and calibration of antenna cross polarization discrimination and penetration loss for millimeter wave communications"
    - "position locationing for millimeter wave systems"
    - "indoor office wideband penetration loss measurements at 73 ghz"
    - "investigation and comparison of 3gpp and nyusim channel models for 5g wireless communications"
    - "a flexible wideband millimeter wave channel sounder with local area and nlos to los transition measurements"
    - "a novel millimeter wave channel simulator and applications for 5g wireless communications"

Connected through hyperedge HE-4 (induced by source paper "overview of millimeter wave communications for fifth generation 5g wireless networks with a focus on propagation models"):
  with members:
    - "indoor office wideband penetration loss measurements at 73 ghz"
    - "study on 3gpp rural macrocell path loss models for millimeter wave wireless communications"
    - "investigation and comparison of 3gpp and nyusim channel models for 5g wireless communications"
    - "millimeter wave small scale spatial statistics in an urban microcell scenario"
    - "a novel millimeter wave channel simulator and applications for 5g wireless communications"
    - "small scale local area and transitional millimeter wave propagation for 5g communications"
    - "5g 3gpp like channel models for outdoor urban microcellular and macrocellular environments"
    - "millimeter wave human blockage at 73 ghz with a simple double knife edge diffraction model and extension for directional antennas"

Connected through hyperedge HE-5 (induced by source paper "joint millimeter wave fronthaul and ofdma resource allocation in ultra dense cran"):
  with members:
    - "locally orthogonal training design for cloud rans based on graph coloring"
    - "content centric sparse multicast beamforming for cache enabled cloud ran"
    - "wireless communications in the era of big data"
    - "5g ultra dense cellular networks"
    - "large scale convex optimization for ultra dense cloud ran"
    - "optimized uplink transmission in multi antenna c ran with spatial compression and forward"
    - "optimized backhaul compression for uplink cloud radio access network"
    - "dynamic nested clustering for parallel phy layer processing in cloud rans"

Connected through hyperedge HE-6 (induced by source paper "a novel millimeter wave channel simulator and applications for 5g wireless communications"):
  with members:
    - "study on 3gpp rural macrocell path loss models for millimeter wave wireless communications"
    - "investigation of prediction accuracy sensitivity and parameter stability of large scale propagation path loss models for 5g wireless communications"
    - "local multipath model parameters for generating 5g millimeter wave 3gpp like channel impulse response"
    - "synthesizing omnidirectional antenna patterns received power and path loss from directional antennas for 5g millimeter wave communications"
    - "spatially sparse precoding in millimeter wave mimo systems"
    - "joint spatial division and multiplexing for mm wave channels"

Connected through hyperedge HE-7 (induced by source paper "ieee 802 11ad based radar an approach to joint vehicular communication radar system"):
  with members:
    - "common codebook millimeter wave beam design designing beams for both sounding and communication with uniform planar arrays"
    - "millimeter wave vehicular communication to support massive automotive sensing"
    - "the impact of beamwidth on temporal channel variation in vehicular channels and its implications"
    - "60 ghz multi gigabit indoor wlans dream or reality"
    - "in band full duplex wireless challenges and opportunities"

Connected through hyperedge HE-8 (induced by source paper "study on 3gpp rural macrocell path loss models for millimeter wave wireless communications"):
  with members:
    - "a novel millimeter wave channel simulator and applications for 5g wireless communications"
    - "5g 3gpp like channel models for outdoor urban microcellular and macrocellular environments"
    - "investigation of prediction accuracy sensitivity and parameter stability of large scale propagation path loss models for 5g wireless communications"
    - "five disruptive technology directions for 5g"

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)