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: "pushing the limits of lte a survey on research enhancing the standard"
  Abstract: Cellular networks are currently experiencing a tremendous growth of data traffic. To cope with this demand, a close cooperation between academic researchers and industry/standardization experts is necessary, which hardly exists in practice. In this paper, we try to bridge this gap between researchers and engineers by providing a review of current standard-related research efforts in wireless communication systems. Furthermore, we give an overview about our attempt in facilitating the exchange of information and results between researchers and engineers, via a common simulation platform for 3GPP long term evolution (LTE) and a corresponding webforum for discussion. Often, especially in signal processing, reproducing results of other researcher is a tedious task, because assumptions and parameters are not clearly specified, which hamper the consideration of the state-of-the-art research in the standardization process. Also, practical constraints, impairments imposed by technological restrictions and well-known physical phenomena, e.g., signaling overhead, synchronization issues, channel fading, are often disregarded by researchers, because of simplicity and mathematical tractability. Hence, evaluating the relevance of research results under practical conditions is often difficult. To circumvent these problems, we developed a standard-compliant opensource simulation platform for LTE that enables reproducible research in a well-defined environment. We demonstrate that innovative research under the confined framework of a real-world standard is possible, sometimes even encouraged. With examples of our research work, we investigate on the potential of several important research areas under typical practical conditions, and highlight consistencies as well as differences between theory and practice.

Connected through hyperedge HE-1 (induced by source paper "metaanalysis of methods for scaling blockchain technology for automotive uses"):
  with members:
    - "a roadmap toward the resilient internet of things for cyber physical systems"
    - "polyshard coded sharding achieves linearly scaling efficiency and security simultaneously"
    - "spectre attacks exploiting speculative execution"
    - "a survey on the security of blockchain systems"
    - "on the feasibility of integrating mmwave and ieee 802 11p for v2v communications"
    - "millimeter wave vehicular communication to support massive automotive sensing"

Connected through hyperedge HE-2 (induced by source paper "software defined optical networks sdons a comprehensive survey"):
  with members:
    - "survey on network virtualization hypervisors for software defined networking"
    - "network function virtualization state of the art and research challenges"
    - "fronthaul constrained cloud radio access networks insights and challenges"
    - "system architecture and key technologies for 5g heterogeneous cloud radio access networks"
    - "renewable energy aware inter datacenter virtual machine migration over elastic optical networks"
    - "software defined and virtualized future mobile and wireless networks a survey"
    - "wireless sensor network virtualization early architecture and research perspectives"
    - "software defined networking a comprehensive survey"

Connected through hyperedge HE-3 (induced by source paper "software defined optical access networks sdoans a comprehensive survey"):
  with members:
    - "network function virtualization state of the art and research challenges"
    - "wireless sensor network virtualization a survey"
    - "fronthaul constrained cloud radio access networks insights and challenges"
    - "system architecture and key technologies for 5g heterogeneous cloud radio access networks"
    - "renewable energy aware inter datacenter virtual machine migration over elastic optical networks"
    - "nfv state of the art challenges and implementation in next generation mobile networks vepc"
    - "scalability and resilience of software defined networking an overview"
    - "group sparse beamforming for green cloud ran"

Connected through hyperedge HE-4 (induced by source paper "sleep period optimization model for layered video service delivery over embms networks"):
  with members:
    - "resource allocation frameworks for network coded layered multimedia multicast services"
    - "network coding meets multimedia a review"

Connected through hyperedge HE-5 (induced by source paper "exploring the physical layer frontiers of cellular uplink the vienna lte a simulator"):
  with members:
    - "massive mimo for next generation wireless systems"
    - "scaling up mimo opportunities and challenges with very large arrays"

Connected through hyperedge HE-6 (induced by source paper "optimized network coded scalable video multicasting over embms networks"):
  with members:
    - "resource allocation frameworks for network coded layered multimedia multicast services"
    - "network coding meets multimedia a review"

Connected through hyperedge HE-7 (induced by source paper "resource allocation frameworks for network coded layered multimedia multicast services"):
  with members:
    - "network coding meets multimedia a review"

Connected through hyperedge HE-8 (induced by source paper "latency and resource utilization analysis for v2x communication over lte mbsfn transmission"):
  with members:
    - "secure vehicular communication systems design and architecture"

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.IT(Information Theory)