human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "a key 6g challenge and opportunity connecting the remaining 4 billions a survey on rural connectivity"):
  Abstract: Providing connectivity to around half of the World population living in rural or underprivileged areas is a tremendous challenge, but also a unique opportunity. In this paper, a survey of technologies for providing connectivity to rural areas, and that can help address this challenge, is provided. Fronthaul and backhaul techniques are discussed. In addition, energy and cost efficiency of the studied technologies are analyzed. Typical application scenarios in rural areas are discussed, and several country-specific use cases are surveyed. Directions for future evolution of rural connectivity are outlined.

Includes members:
  Member "connecting the unconnected towards frugal 5g network architecture and standardization":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "realizing the frugal 5g network")
  Member "5g new radio evolution meets satellite communications opportunities challenges and solutions":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "debunking seven myths about 5g new radio")
  Member "aeronautical ad hoc networking for the internet above the clouds":
    also connected through other hyperedges:
      (none)
  Member "percolation for d2d networks on street systems":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "malware propagation in urban d2d networks")
  Member "information and communications technologies for sustainable development goals state of the art needs and perspectives":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "a survey on consensus mechanisms and mining strategy management in blockchain networks")
  Member "sum rate analysis for high altitude platform hap drones with tethered balloon relay":
    also connected through other hyperedges:
      (none)
  Member "optical communication in space challenges and mitigation techniques":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "unmanned aerial vehicles uavs a survey on civil applications and key research challenges")
  Member "feasibility architecture and cost considerations of using tvws for rural internet access in 5g":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "a review of routing protocol selection for wireless sensor networks in smart cities")

Question: Please tell me which class the source paper 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)