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: "software defined space air ground integrated vehicular networks challenges and solutions"
  Abstract: This article proposes a software defined space-air-ground integrated network architecture for supporting diverse vehicular services in a seamless, efficient, and cost-effective manner. Firstly, the motivations and challenges for integration of space-air-ground networks are reviewed. Secondly, a software defined network architecture with a layered structure is presented. To protect the legacy services in satellite, aerial, and territorial segments, resources in each segment are sliced through network slicing to achieve service isolation. Then, available resources are put into a common and dynamic space-air-ground resource pool, which is managed by hierarchical controllers to accommodate vehicular services. Finally, a case study is carried out, followed by discussion on some open research topics.

Connected through hyperedge HE-1 (induced by source paper "allocation of computation intensive graph jobs over vehicular clouds in iov"):
  with members:
    - "power aware allocation of graph jobs in geo distributed cloud networks"
    - "allocation of graph jobs in geo distributed cloud networks"
    - "joint task offloading scheduling and transmit power allocation for mobile edge computing systems"
    - "a survey on low latency towards 5g ran core network and caching solutions"
    - "scheduling storms and streams in the cloud"

Connected through hyperedge HE-2 (induced by source paper "uav communications for 5g and beyond recent advances and future trends"):
  with members:
    - "comparison of limited feedback schemes for noma transmission in mmwave drone networks"
    - "energy optimization for cellular connected multi uav mobile edge computing systems with multi access schemes"
    - "beyond 5g with uavs foundations of a 3d wireless cellular network"
    - "resource allocation for solar powered uav communication systems"
    - "cellular connected uav potentials challenges and promising technologies"
    - "real time optimal resource allocation for embedded uav communication systems"
    - "optimal 3d trajectory design and resource allocation for solar powered uav communication systems"
    - "minimum throughput maximization in uav aided wireless powered communication networks"

Connected through hyperedge HE-3 (induced by source paper "ultra reliable low latency communications in autonomous vehicular networks"):
  with members:
    - "joint optimization of computation and communication power in multi user massive mimo systems"
    - "coverage and handoff analysis of 5g fractal small cell networks"
    - "5g software defined vehicular networks"
    - "network slicing to enable scalability and flexibility in 5g mobile networks"
    - "dense small cell networks from noise limited to dense interference limited"
    - "vehicular communications for 5g cooperative small cell networks"
    - "heterogeneous cellular networks with spatio temporal traffic delay analysis and scheduling"
    - "from network sharing to multi tenancy the 5g network slice broker"

Connected through hyperedge HE-4 (induced by source paper "authentication scheme based on hashchain for space air ground integrated network"):
  with members:
    - "lsb a lightweight scalable blockchain for iot security and privacy"
    - "blockchain in internet of things challenges and solutions"

Connected through hyperedge HE-5 (induced by source paper "mobility aware joint service placement and routing in space air ground integrated networks"):
  with members:
    - "power aware virtual network function placement and routing using an abstraction technique"

Connected through hyperedge HE-6 (induced by source paper "air ground integrated vehicular network slicing with content pushing and caching"):
  with members:
    - "comp in the sky uav placement and movement optimization for multi user communications"
    - "cost effective cache deployment in mobile heterogeneous networks"
    - "self sustaining caching stations toward cost effective 5g enabled vehicular networks"
    - "policy optimization for content push via energy harvesting small cells in heterogeneous networks"
    - "designing and implementing future aerial communication networks"
    - "mobility aware caching for content centric wireless networks modeling and methodology"
    - "fso based vertical backhaul fronthaul framework for 5g wireless networks"
    - "the new frontier in ran heterogeneity multi tier drone cells"

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)