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: "why to decouple the uplink and downlink in cellular networks and how to do it"
  Abstract: Ever since the inception of mobile telephony, the downlink and uplink of cellular networks have been coupled, i.e. mobile terminals have been constrained to associate with the same base station (BS) in both the downlink and uplink directions. New trends in network densification and mobile data usage increase the drawbacks of this constraint, and suggest that it should be revisited. In this paper we identify and explain five key arguments in favor of Downlink/Uplink Decoupling (DUDe) based on a blend of theoretical, experimental, and logical arguments. We then overview the changes needed in current (LTE-A) mobile systems to enable this decoupling, and then look ahead to fifth generation (5G) cellular standards. We believe the introduced paradigm will lead to significant gains in network throughput, outage and power consumption at a much lower cost compared to other solutions providing comparable or lower gains.

Connected through hyperedge HE-1 (induced by source paper "performance of network assisted full duplex for cell free massive mimo"):
  with members:
    - "on the feasibility of full duplex large scale mimo cellular systems"
    - "cell free massive mimo versus small cells"
    - "full duplex emulation via spatial separation of half duplex nodes in a planar cellular network"
    - "cell free massive mimo uniformly great service for everyone"
    - "interference management in 5g reverse tdd hetnets with wireless backhaul a large system analysis"
    - "compflex comp for in band wireless full duplex"
    - "in band alpha duplex scheme for cellular networks a stochastic geometry approach"
    - "multipair full duplex relaying with massive arrays and linear processing"

Connected through hyperedge HE-2 (induced by source paper "joint uplink and downlink transmissions in user centric ofdma cloud ran"):
  with members:
    - "joint precoding and rrh selection for user centric green mimo c ran"
    - "fronthaul limited uplink ofdma in ultra dense cran with hybrid decoding"
    - "joint millimeter wave fronthaul and ofdma resource allocation in ultra dense cran"
    - "green ofdma resource allocation in cache enabled cran"
    - "fronthaul constrained cloud radio access networks insights and challenges"
    - "coordinated scheduling for the downlink of cloud radio access networks"
    - "what will 5g be"
    - "sparse beamforming and user centric clustering for downlink cloud radio access network"

Connected through hyperedge HE-3 (induced by source paper "optimal downlink uplink scheduling of wireless networked control for industrial iot"):
  with members:
    - "real time remote estimation with hybrid arq in wireless networked control"
    - "to retransmit or not real time remote estimation in wireless networked control"
    - "wireless network design for control systems a survey"
    - "the emerging internet of things marketplace from an industrial perspective a survey"
    - "on the complexity of solving markov decision problems"
    - "in band full duplex wireless challenges and opportunities"
    - "optimal packet scheduling in an energy harvesting communication system"

Connected through hyperedge HE-4 (induced by source paper "distributed user clustering and resource allocation for imperfect noma in heterogeneous networks"):
  with members:
    - "distributed cluster formation and power bandwidth allocation for imperfect noma in dl hetnets"
    - "optimal resource allocation for power efficient mc noma with imperfect channel state information"
    - "dynamic user clustering and power allocation for uplink and downlink non orthogonal multiple access noma systems"
    - "power and channel allocation for non orthogonal multiple access in 5g systems tractability and computation"
    - "non orthogonal multiple access noma for downlink multiuser mimo systems user clustering beamforming and power allocation"

Connected through hyperedge HE-5 (induced by source paper "dynamic time frequency division duplex"):
  with members:
    - "user selection and power allocation in full duplex multicell networks"
    - "interference spins scheduling of multiple interfering two way wireless links"
    - "multi objective optimization for robust power efficient and secure full duplex wireless communication systems"
    - "analysis of the decoupled access for downlink and uplink in wireless heterogeneous networks"
    - "on the spectral efficiency of full duplex small cell wireless systems"

Connected through hyperedge HE-6 (induced by source paper "multi channel access solutions for 5g new radio"):
  with members:
    - "compflex comp for in band wireless full duplex"
    - "an overview of load balancing in hetnets old myths and open problems"
    - "downlink and uplink decoupling a disruptive architectural design for 5g networks"

Connected through hyperedge HE-7 (induced by source paper "a queueing approach to the latency of decoupled ul dl with flexible tdd and asymmetric services"):
  with members:
    - "interference spins scheduling of multiple interfering two way wireless links"
    - "analysis of the decoupled access for downlink and uplink in wireless heterogeneous networks"

Connected through hyperedge HE-8 (induced by source paper "a data aided channel estimation scheme for decoupled systems in heterogeneous networks"):
  with members:
    - "performance impact of los and nlos transmissions in dense cellular networks"
    - "analysis of the decoupled access for downlink and uplink in wireless heterogeneous networks"
    - "joint rate and sinr coverage analysis for decoupled uplink downlink biased cell associations in hetnets"
    - "what will 5g be"
    - "massive mimo meets hetnet interference coordination through spatial blanking"
    - "downlink and uplink decoupling a disruptive architectural design for 5g networks"
    - "load backhaul aware decoupled downlink uplink access in 5g systems"
    - "massive mimo and small cells improving energy efficiency by optimal soft cell coordination"

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)