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: "small cell traffic balancing over licensed and unlicensed bands"
  Abstract: The Third-Generation Partnership Project (3GPP) has recently started standardizing the “licensed-assisted access using LTE” for small cells, which is referred to as dual-band femtocell (DBF) in this paper, which uses the Long-Term Evolution (LTE) air interface in both the licensed and unlicensed bands based on the LTE carrier aggregation feature. Alternatively, the Small Cell Forum introduced the integrated femto-WiFi (IFW) small cell, which simultaneously accesses both the licensed band (via cellular interface) and the unlicensed band (via WiFi interface). In this paper, a practical algorithm for IFW and DBF to automatically balance their traffic in licensed and unlicensed bands, based on the real-time channel, interference, and traffic conditions of both bands, is described. The algorithm considers the fact that some “smart” devices (sDevices) have both cellular and WiFi radios, while some WiFi-only devices (wDevices) may only have WiFi radio. In addition, the algorithm considers a realistic scenario where a single small-cell user may simultaneously use multiple sDevices and wDevices via either the IFW or the DBF in conjunction with a wireless local area network. The goal is to maximize the total user satisfaction/utility of the small-cell user, while keeping the interference from small cells to macrocells below predefined thresholds. The algorithm can be implemented at the radio link control or the network layer of the IFW and DBF small-cell base stations. Results demonstrate that the proposed traffic-balancing algorithm applied to either IFW or DBF significantly increases the sum utility of all macrocell and small-cell users, compared with the current practices. Finally, various implementation issues of IFW and DBF are addressed.

Connected through hyperedge HE-1 (induced by source paper "contract based incentive mechanism for lte over unlicensed channels"):
  with members:
    - "orla olaa orthogonal coexistence of laa and wifi in unlicensed spectrum"
    - "echo state networks for self organizing resource allocation in lte u with uplink downlink decoupling"
    - "network formation in the sky unmanned aerial vehicles for multi hop wireless backhauling"
    - "proactive resource management in lte u systems a deep learning perspective"
    - "the impact of unlicensed access on small cell resource allocation"
    - "breaking the economic barrier of caching in cellular networks incentives and contracts"
    - "caching in the sky proactive deployment of cache enabled unmanned aerial vehicles for optimized quality of experience"
    - "auction based coopetition between lte unlicensed and wi fi"

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"
    - "unlicensed lte wifi coexistence is lbt inherently fairer than csat"
    - "rigorous and practical proportional fair allocation for multi rate wi fi"
    - "control theoretic optimization of 802 11 wlans implementation and experimental evaluation"

Connected through hyperedge HE-3 (induced by source paper "echo state networks for self organizing resource allocation in lte u with uplink downlink decoupling"):
  with members:
    - "a multi game framework for harmonized lte u and wifi coexistence over unlicensed bands"
    - "opportunistic sleep mode strategies in wireless small cell networks"
    - "learning how to communicate in the internet of things finite resources and heterogeneity"
    - "holistic small cell traffic balancing across licensed and unlicensed bands"
    - "modeling and analyzing the coexistence of wi fi and lte in unlicensed spectrum"
    - "dynamic clustering and on off strategies for wireless small cell networks"
    - "why to decouple the uplink and downlink in cellular networks and how to do it"
    - "joint rate and sinr coverage analysis for decoupled uplink downlink biased cell associations in hetnets"

Connected through hyperedge HE-4 (induced by source paper "traffic management for heterogeneous networks with opportunistic unlicensed spectrum sharing"):
  with members:
    - "modeling and analyzing the coexistence of wi fi and lte in unlicensed spectrum"
    - "fundamentals of the downlink green coverage and energy efficiency in heterogeneous networks"
    - "on the limits of coexisting coverage and capacity in multi rat heterogeneous networks"
    - "coexisting success probability and throughput of multi rat wireless networks with unlicensed band access"
    - "random cell association and void probability in poisson distributed cellular networks"
    - "optimal cell load and throughput in green small cell networks with generalized cell association"
    - "coexistence of wi fi and heterogeneous small cell networks sharing unlicensed spectrum"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"

Connected through hyperedge HE-5 (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"
    - "unlicensed lte wifi coexistence is lbt inherently fairer than csat"
    - "rigorous and practical proportional fair allocation for multi rate wi fi"
    - "convexity conditions for 802 11 wlans"

Connected through hyperedge HE-6 (induced by source paper "holistic small cell traffic balancing across licensed and unlicensed bands"):
  with members:
    - "coordinated dynamic spectrum management of lte u and wi fi networks"
    - "unlicensed lte wifi coexistence is lbt inherently fairer than csat"
    - "adaptive spectrum sharing of lte co existing with wlan in unlicensed frequency bands"
    - "enhanced intercell interference coordination challenges in heterogeneous networks"

Connected through hyperedge HE-7 (induced by source paper "a multi game framework for harmonized lte u and wifi coexistence over unlicensed bands"):
  with members:
    - "echo state networks for self organizing resource allocation in lte u with uplink downlink decoupling"
    - "sharing of unlicensed spectrum by strategic operators"

Connected through hyperedge HE-8 (induced by source paper "embedding lte u within wi fi bands for spectrum efficiency improvement"):
  with members:
    - "coexistence of wi fi and heterogeneous small cell networks sharing unlicensed spectrum"

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)