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: "a survey on legacy and emerging technologies for public safety communications"
  Abstract: Effective emergency and natural disaster management depend on the efficient mission-critical voice and data communication between first responders and victims. Land mobile radio system (LMRS) is a legacy narrowband technology used for critical voice communications with limited use for data applications. Recently, long term evolution (LTE) emerged as a broadband communication technology that has a potential to transform the capabilities of public safety technologies by providing broadband, ubiquitous, and mission-critical voice and data support. For example, in the United States, FirstNet is building a nationwide coast-to-coast public safety network based on LTE broadband technology. This paper presents a comparative survey of legacy and the LTE-based public safety networks, and discusses the LMRS-LTE convergence as well as mission-critical push-to-talk over LTE. A simulation study of LMRS and LTE band class 14 technologies is provided using the NS-3 open source tool. An experimental study of APCO-25 and LTE band class 14 is also conducted using software-defined radio to enhance the understanding of the public safety systems. Finally, emerging technologies that may have strong potential for use in public safety networks are reviewed.

Connected through hyperedge HE-1 (induced by source paper "heuristic approach for jointly optimizing feicic and uav locations in multi tier lte advanced public safety hetnet"):
  with members:
    - "predictive deployment of uav base stations in wireless networks machine learning meets contract theory"
    - "performance analysis for practical unmanned aerial vehicle networks with los nlos transmissions"
    - "interference coordination for aerial and terrestrial nodes in three tier lte advanced hetnet"
    - "coexistence of terrestrial and aerial users in cellular networks"
    - "a stochastic geometry model of backhaul and user coverage in urban uav networks"
    - "optimal transport theory for power efficient deployment of unmanned aerial vehicles"
    - "uav assisted heterogeneous networks for capacity enhancement"
    - "drone small cells in the clouds design deployment and performance analysis"

Connected through hyperedge HE-2 (induced by source paper "unmanned aerial vehicles uavs a survey on civil applications and key research challenges"):
  with members:
    - "resource allocation for solar powered uav communication systems"
    - "3 d placement of an unmanned aerial vehicle base station for maximum coverage of users with different qos requirements"
    - "indoor mobile coverage problem using uavs"
    - "the sky is not the limit lte for unmanned aerial vehicles"
    - "a tutorial on uavs for wireless networks applications challenges and open problems"
    - "wireless communication using unmanned aerial vehicles uavs optimal transport theory for hover time optimization"
    - "efficient 3d placement of a uav using particle swarm optimization"
    - "placement optimization of uav mounted mobile base stations"

Connected through hyperedge HE-3 (induced by source paper "implementation of reference public safety scenarios in ns 3"):
  with members:
    - "end to end simulation of 5g mmwave networks"
    - "end to end simulation of integrated access and backhaul at mmwaves"
    - "the sky is not the limit lte for unmanned aerial vehicles"
    - "improved handover through dual connectivity in 5g mmwave mobile networks"
    - "ns 3 implementation of the 3gpp mimo channel model for frequency spectrum above 6 ghz"
    - "millimeter wave cellular wireless networks potentials and challenges"

Connected through hyperedge HE-4 (induced by source paper "analysis of non pilot interference on link adaptation and latency in cellular networks"):
  with members:
    - "lte phy layer vulnerability analysis and testing using open source sdr tools"
    - "narrowband iot data transmission procedures for massive machine type communications"
    - "performance analysis of a mission critical portable lte system in targeted rf interference"

Connected through hyperedge HE-5 (induced by source paper "exploiting lte advanced hetnets and feicic for uav assisted public safety communications"):
  with members:
    - "game based approach for qos provisioning and interference management in heterogeneous networks"
    - "optimal transport theory for power efficient deployment of unmanned aerial vehicles"
    - "uav assisted heterogeneous networks for capacity enhancement"
    - "drone small cells in the clouds design deployment and performance analysis"
    - "algorithms for enhanced inter cell interference coordination eicic in lte hetnets"
    - "capacity analysis of lte advanced hetnets with reduced power subframes and range expansion"

Connected through hyperedge HE-6 (induced by source paper "interference coordination for aerial and terrestrial nodes in three tier lte advanced hetnet"):
  with members:
    - "exploiting lte advanced hetnets and feicic for uav assisted public safety communications"
    - "coexistence of terrestrial and aerial users in cellular networks"
    - "designing and implementing future aerial communication networks"
    - "preliminary results on 3d channel modeling from theory to standardization"

Connected through hyperedge HE-7 (induced by source paper "uav empowered disaster resilient edge architecture for delay sensitive communication"):
  with members:
    - "a survey on low latency towards 5g ran core network and caching solutions"
    - "mobile edge computing via a uav mounted cloudlet optimization of bit allocation and path planning"
    - "lte enhancements for public safety and security communications to support group multimedia communications"

Connected through hyperedge HE-8 (induced by source paper "self enforcing game theory based resource allocation for lorawan assisted public safety communications"):
  with members:
    - "energy efficient resource allocation for mobile edge computing based augmented reality applications"
    - "energy efficient resource allocation for mobile edge computation offloading"

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)