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: "rigorous and practical proportional fair allocation for multi rate wi fi"
  Abstract: Recent experimental studies confirm the prevalence of the widely known performance anomaly problem in current Wi-Fi networks, and report on the severe network utility degradation caused by this phenomenon. Although a large body of work addressed this issue, we attribute the refusal of prior solutions to their poor implementation feasibility with off-the-shelf hardware and their imprecise modelling of the 802.11 protocol. Their applicability is further challenged today by very high throughput enhancements (802.11n/ac) whereby link speeds can vary by two orders of magnitude. Unlike earlier approaches, in this paper we introduce the first rigorous analytical model of 802.11 stations' throughput and airtime in multi-rate settings, without sacrificing accuracy for tractability. We use the proportional-fair allocation criterion to formulate network utility maximisation as a convex optimisation problem for which we give a closed-form solution. We present a fully functional light-weight implementation of our scheme on commodity access points and evaluate this extensively via experiments in a real deployment, over a broad range of network conditions. Results demonstrate that our proposal achieves up to 100\% utility gains, can double video streaming goodput and reduces TCP download times by 8x.

Connected through hyperedge HE-1 (induced by source paper "wireless optimisation via convex bandits unlicensed lte wifi coexistence"):
  with members:
    - "introduction to online convex optimization"
    - "distributed user association in energy harvesting small cell networks a probabilistic bandit model"
    - "fair coexistence of scheduled and random access wireless networks unlicensed lte wifi"
    - "multi armed bandits with application to 5g small cells"
    - "kernel based methods for bandit convex optimization"
    - "an optimal algorithm for bandit convex optimization"
    - "analysis and optimization of caching and multicasting in large scale cache enabled heterogeneous wireless networks"
    - "combinatorial bandits revisited"

Connected through hyperedge HE-2 (induced by source paper "orla olaa orthogonal coexistence of laa and wifi in unlicensed spectrum"):
  with members:
    - "fair coexistence of scheduled and random access wireless networks unlicensed lte wifi"
    - "random access preamble design and detection for 3gpp narrowband iot systems"
    - "srslte an open source platform for lte evolution and experimentation"
    - "small cell traffic balancing over licensed and unlicensed bands"
    - "unlicensed lte wifi coexistence is lbt inherently fairer than csat"
    - "control theoretic optimization of 802 11 wlans implementation and experimental evaluation"

Connected through hyperedge HE-3 (induced by source paper "maximising the utility of enterprise millimetre wave networks"):
  with members:
    - "understanding noise and interference regimes in 5g millimeter wave cellular networks"
    - "five disruptive technology directions for 5g"
    - "user association for load balancing in heterogeneous cellular networks"
    - "max min fairness in 802 11 mesh networks"

Connected through hyperedge HE-4 (induced by source paper "utility fair rate allocation in lte 802 11 networks"):
  with members:
    - "proportional fair mu mimo in 802 11 wlans"
    - "an overview of load balancing in hetnets old myths and open problems"
    - "log convexity of rate region in 802 11e wlans"
    - "user network association in a wlan umts hybrid cell global individual optimality"

Connected through hyperedge HE-5 (induced by source paper "fair airtime allocation for content dissemination in wifi direct based mobile social networks"):
  with members:
    - "enabling multi hop ad hoc networks through wifi direct multi group networking"
    - "content centric routing in wi fi direct multi group networks"

Connected through hyperedge HE-6 (induced by source paper "fair coexistence of scheduled and random access wireless networks unlicensed lte wifi"):
  with members:
    - "srslte an open source platform for lte evolution and experimentation"
    - "small cell traffic balancing over licensed and unlicensed bands"
    - "unlicensed lte wifi coexistence is lbt inherently fairer than csat"
    - "convexity conditions for 802 11 wlans"

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)