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: "terahertz technologies to deliver optical network quality of experience in wireless systems beyond 5g"
  Abstract: This article discusses the basic system architecture for terahertz (THz) wireless links with bandwidths of more than 50 GHz into optical networks. New design principles and breakthrough technologies are required in order to demonstrate Tbps data-rates at near zero-latency using the proposed system concept. Specifically, we present the concept of designing the baseband signal processing for both the optical and wireless link and using an end-to-end (E2E) error correction approach for the combined link. We provide two possible electro-optical baseband interface architectures, namely transparent optical-link and digital-link architectures, which are currently under investigation. THz wireless link requirements are given as well as the main principles and research directions for the development of a new generation of transceiver frontends, which will be capable of operating at ultra-high spectral efficiency by employing higher-order modulation schemes. Moreover, we discuss the need for developing a novel THz network information theory framework, which will take into account the channel characteristics and the nature of interference in the THz band. Finally, we highlight the role of pencil-beamforming (PBF), which is required in order to overcome the propagation losses, as well as the physical layer and medium access control challenges.

Connected through hyperedge HE-1 (induced by source paper "mac protocols for terahertz communication a comprehensive survey"):
  with members:
    - "on the reliability of wireless virtual reality at terahertz thz frequencies"
    - "a tutorial on beam management for 3gpp nr at mmwave frequencies"
    - "on unified vehicular communications and radar sensing in millimeter wave and low terahertz bands"
    - "survey on terahertz nanocommunication and networking a top down perspective"
    - "end to end simulation of 5g mmwave networks"
    - "wireless terahertz system architectures for networks beyond 5g"
    - "slotted csma ca based energy efficient mac protocol design in nanonetworks"
    - "last meter indoor terahertz wireless access performance insights and implementation roadmap"

Connected through hyperedge HE-2 (induced by source paper "ergodic capacity evaluation of wireless thz fiber extenders"):
  with members:
    - "wireless terahertz system architectures for networks beyond 5g"
    - "low cost cognitive radios against spectrum scarcity"
    - "i q imbalance self interference coordination"
    - "millimeter wave cellular networks a mac layer perspective"
    - "massive mimo systems with hardware constrained base stations"
    - "a new look at dual hop relaying performance limits with hardware impairments"
    - "optimal coordinated beamforming in the multicell downlink with transceiver impairments"
    - "mimo transmission with residual transmit rf impairments"

Connected through hyperedge HE-3 (induced by source paper "analytical performance evaluation of beamforming under transceivers hardware imperfections"):
  with members:
    - "wireless terahertz system architectures for networks beyond 5g"
    - "low cost cognitive radios against spectrum scarcity"
    - "a new look at dual hop relaying performance limits with hardware impairments"
    - "mimo transmission with residual transmit rf impairments"

Connected through hyperedge HE-4 (induced by source paper "analytical performance evaluation of thz wireless fiber extenders"):
  with members:
    - "wireless terahertz system architectures for networks beyond 5g"
    - "statistical modeling of propagation channels for terahertz band"

Connected through hyperedge HE-5 (induced by source paper "performance evaluation of thz wireless systems under the joint impact of misalignment fading and phase noise"):
  with members:
    - "i q imbalance self interference coordination"

Connected through hyperedge HE-6 (induced by source paper "wireless terahertz system architectures for networks beyond 5g"):
  with members:
    - "low cost cognitive radios against spectrum scarcity"
    - "hybrid beamforming for massive mimo a survey"
    - "tracking angles of departure and arrival in a mobile millimeter wave channel"
    - "millimeter wave cellular networks a mac layer perspective"
    - "spatially common sparsity based adaptive channel estimation and feedback for fdd massive mimo"
    - "efficient scheduling and power allocation for d2d assisted wireless caching networks"
    - "an overview of load balancing in hetnets old myths and open problems"
    - "channel estimation and hybrid precoding for millimeter wave cellular 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)