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: "inter technology backscatter towards internet connectivity for implanted devices"
  Abstract: We introduce inter-technology backscatter, a novel approach that transforms wireless transmissions from one technology to another, on the air. Specifically, we show for the first time that Bluetooth transmissions can be used to create Wi-Fi and ZigBee-compatible signals using backscatter communication. Since Bluetooth, Wi-Fi and ZigBee radios are widely available, this approach enables a backscatter design that works using only commodity devices. #R##N#We build prototype backscatter hardware using an FPGA and experiment with various Wi-Fi, Bluetooth and ZigBee devices. Our experiments show we can create 2-11 Mbps Wi-Fi standards-compliant signals by backscattering Bluetooth transmissions. To show the generality of our approach, we also demonstrate generation of standards-complaint ZigBee signals by backscattering Bluetooth transmissions. Finally, we build proof-of-concepts for previously infeasible applications including the first contact lens form-factor antenna prototype and an implantable neural recording interface that communicate directly with commodity devices such as smartphones and watches, thus enabling the vision of Internet connected implanted devices.

Connected through hyperedge HE-1 (induced by source paper "design of ambient backscatter training for retrodirective wireless power transfer"):
  with members:
    - "retrodirective large antenna energy beamforming in backscatter multi user networks"
    - "retrodirective multi user wireless power transfer with massive mimo"
    - "next generation backscatter communication systems techniques and applications"
    - "ambient backscatter communications a contemporary survey"
    - "modulation in the air backscatter communication over ambient ofdm carrier"
    - "communications and signals design for wireless power transmission"
    - "wireless powered communication opportunities and challenges"
    - "performance analysis of massive mimo for cell boundary users"

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"
    - "fm backscatter enabling connected cities and smart fabrics"
    - "powering the next billion devices with wi fi"

Connected through hyperedge HE-3 (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"
    - "fm backscatter enabling connected cities and smart fabrics"

Connected through hyperedge HE-4 (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"
    - "fm backscatter enabling connected cities and smart fabrics"
    - "modulation in the air backscatter communication over ambient ofdm carrier"
    - "multi antenna wireless energy transfer for backscatter communication systems"
    - "spectrum refarming a new paradigm of spectrum sharing for cellular networks"

Connected through hyperedge HE-5 (induced by source paper "ambient backscatter systems exact average bit error rate under fading channels"):
  with members:
    - "lora backscatter enabling the vision of ubiquitous connectivity"
    - "modulation in the air backscatter communication over ambient ofdm carrier"
    - "wirelessly powered backscatter communication networks modeling coverage and capacity"
    - "semi coherent detection and performance analysis for ambient backscatter system"

Connected through hyperedge HE-6 (induced by source paper "authenticating on body backscatter by exploiting propagation signatures"):
  with members:
    - "securing on body iot devices by exploiting creeping wave propagation"

Connected through hyperedge HE-7 (induced by source paper "backscatter communications for internet of things theory and applications"):
  with members:
    - "backscatter multiplicative multiple access systems fundamental limits and practical design"
    - "ambient backscatter communications a contemporary survey"
    - "waveform design for wireless power transfer"
    - "full duplex backscatter interference networks based on time hopping spread spectrum"
    - "wireless communications with unmanned aerial vehicles opportunities and challenges"
    - "multi antenna wireless energy transfer for backscatter communication systems"
    - "in band full duplex wireless challenges and opportunities"

Connected through hyperedge HE-8 (induced by source paper "next generation backscatter communication systems techniques and applications"):
  with members:
    - "backscatter multiplicative multiple access systems fundamental limits and practical design"
    - "ambient backscatter communications a contemporary survey"
    - "waveform design for wireless power transfer"
    - "full duplex backscatter interference networks based on time hopping spread spectrum"
    - "wireless communications with unmanned aerial vehicles opportunities and challenges"
    - "multi antenna wireless energy transfer for backscatter communication systems"
    - "in band full duplex wireless challenges and opportunities"

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)