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: "fm backscatter enabling connected cities and smart fabrics"
  Abstract: This paper enables connectivity on everyday objects by transforming them into FM radio stations. To do this, we show for the first time that ambient FM radio signals can be used as a signal source for backscatter communication. Our design creates backscatter transmissions that can be decoded on any FM receiver including those in cars and smartphones. This enables us to achieve a previously infeasible capability: backscattering information to cars and smartphones in outdoor environments. #R##N#Our key innovation is a modulation technique that transforms backscatter, which is a multiplication operation on RF signals, into an addition operation on the audio signals output by FM receivers. This enables us to embed both digital data as well as arbitrary audio into ambient analog FM radio signals. We build prototype hardware of our design and successfully embed audio transmissions over ambient FM signals. Further, we achieve data rates of up to 3.2 kbps and ranges of 5-60 feet, while consuming as little as 11.07{\mu}W of power. To demonstrate the potential of our design, we also fabricate our prototype on a cotton t-shirt by machine sewing patterns of a conductive thread to create a smart fabric that can transmit data to a smartphone. We also embed FM antennas into posters and billboards and show that they can communicate with FM receivers in cars and smartphones.

Connected through hyperedge HE-1 (induced by source paper "performance characterisation of relaying using backscatter devices"):
  with members:
    - "ambient backscatter systems exact average bit error rate under fading channels"
    - "modulation in the air backscatter communication over ambient ofdm carrier"
    - "backscatter communications for the internet of things a stochastic geometry approach"
    - "wirelessly powered backscatter communication networks modeling coverage and capacity"
    - "semi coherent detection and performance analysis for ambient backscatter system"

Connected through hyperedge HE-2 (induced by source paper "tunnelscatter low power communication for sensor tags using tunnel diodes"):
  with members:
    - "living iot a flying wireless platform on live insects"
    - "solargest ubiquitous and battery free gesture recognition using solar cells"
    - "lora backscatter enabling the vision of ubiquitous connectivity"
    - "inter technology backscatter towards internet connectivity for implanted devices"
    - "powering the next billion devices with wi fi"

Connected through hyperedge HE-3 (induced by source paper "lightweight sybil resilient multi robot networks by multipath manipulation"):
  with members:
    - "shieldscatter improving iot security with backscatter assistance"
    - "authenticating on body backscatter by exploiting propagation signatures"
    - "lora backscatter enabling the vision of ubiquitous connectivity"
    - "the mason test a defense against sybil attacks in wireless networks without trusted authorities"

Connected through hyperedge HE-4 (induced by source paper "living iot a flying wireless platform on live insects"):
  with members:
    - "netscatter enabling large scale backscatter networks"
    - "lora backscatter enabling the vision of ubiquitous connectivity"
    - "inter technology backscatter towards internet connectivity for implanted devices"

Connected through hyperedge HE-5 (induced by source paper "hybrid beamformer design for high dynamic range ambient backscatter receivers"):
  with members:
    - "backscatter multiplicative multiple access systems fundamental limits and practical design"
    - "modulation in the air backscatter communication over ambient ofdm carrier"
    - "full duplex backscatter interference networks based on time hopping spread spectrum"

Connected through hyperedge HE-6 (induced by source paper "optimal resource allocation in full duplex ambient backscatter communication networks for wireless powered iot"):
  with members:
    - "cooperative ambient backscatter communications for green internet of things"
    - "riding on the primary a new spectrum sharing paradigm for wireless powered iot devices"
    - "wireless powered asynchronous backscatter networks with sporadic short packets performance analysis and optimization"
    - "lora backscatter enabling the vision of ubiquitous connectivity"
    - "backscatter multiplicative multiple access systems fundamental limits and practical design"
    - "modulation in the air backscatter communication over ambient ofdm carrier"
    - "throughput optimization for massive mimo systems powered by wireless energy transfer"
    - "multi antenna wireless energy transfer for backscatter communication systems"

Connected through hyperedge HE-7 (induced by source paper "cooperative ambient backscatter communications for green internet of things"):
  with members:
    - "riding on the primary a new spectrum sharing paradigm for wireless powered iot devices"
    - "modulation in the air backscatter communication over ambient ofdm carrier"
    - "inter technology backscatter towards internet connectivity for implanted devices"
    - "multi antenna wireless energy transfer for backscatter communication systems"
    - "spectrum refarming a new paradigm of spectrum sharing for cellular networks"

Connected through hyperedge HE-8 (induced by source paper "optimal resource allocation in full duplex ambient backscatter communication networks for green iot"):
  with members:
    - "cooperative ambient backscatter communications for green internet of things"
    - "riding on the primary a new spectrum sharing paradigm for wireless powered iot devices"
    - "modulation in the air backscatter communication over ambient ofdm carrier"
    - "multi antenna wireless energy transfer for backscatter communication systems"
    - "wireless information and power transfer in multiuser ofdm 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)