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: "on the complexity of optimal routing and content caching in heterogeneous networks"
  Abstract: We investigate the problem of optimal request routing and content caching in a heterogeneous network supporting in-network content caching with the goal of minimizing average content access delay. Here, content can either be accessed directly from a back-end server (where content resides permanently) or be obtained from one of multiple in-network caches. To access a piece of content, a user must decide whether to route its request to a cache or to the back-end server. Additionally, caches must decide which content to cache. We investigate the problem complexity of two problem formulations, where the direct path to the back-end server is modeled as i) a congestion-sensitive or ii) a congestion-insensitive path, reflecting whether or not the delay of the uncached path to the back-end server depends on the user request load, respectively. We show that the problem is NP-complete in both cases. We prove that under the congestion-insensitive model the problem can be solved optimally in polynomial time if each piece of content is requested by only one user, or when there are at most two caches in the network. We also identify a structural property of the user-cache graph that potentially makes the problem NP-complete. For the congestion-sensitive model, we prove that the problem remains NP-complete even if there is only one cache in the network and each content is requested by only one user. We show that approximate solutions can be found for both models within a (1-1/e) factor of the optimal solution, and demonstrate a greedy algorithm that is found to be within 1% of optimal for small problem sizes. Through trace-driven simulations we evaluate the performance of our greedy algorithms, which show up to a 50% reduction in average delay over solutions based on LRU content caching.

Connected through hyperedge HE-1 (induced by source paper "a ttl based approach for content placement in edge networks"):
  with members:
    - "cache version selection and content placement for adaptive video streaming in wireless edge networks"
    - "jointly optimal routing and caching for arbitrary network topologies"
    - "a utility optimization approach to network cache design"
    - "adaptive caching networks with optimality guarantees"
    - "a unified approach to the performance analysis of caching systems"

Connected through hyperedge HE-2 (induced by source paper "consistent user traffic allocation and load balancing in mobile edge caching"):
  with members:
    - "utilcache effectively and practicably reducing link cost in information centric network"
    - "optimal cache leasing from a mobile network operator to a content provider"
    - "caching at the wireless edge design aspects challenges and future directions"
    - "joint caching routing and channel assignment for collaborative small cell cellular networks"

Connected through hyperedge HE-3 (induced by source paper "kelly cache networks"):
  with members:
    - "jointly optimal routing and caching for arbitrary network topologies"
    - "adaptive caching networks with optimality guarantees"
    - "vip a framework for joint dynamic forwarding and caching in named data networks"

Connected through hyperedge HE-4 (induced by source paper "inter cluster cooperation for wireless d2d caching networks"):
  with members:
    - "skylite end to end design of low altitude uav networks for providing lte connectivity"
    - "high throughput opportunistic cooperative device to device communications with caching"
    - "optimal caching and scheduling for cache enabled d2d communications"
    - "delay analysis for wireless d2d caching with inter cluster cooperation"
    - "wireless device to device caching networks basic principles and system performance"
    - "delay analysis and optimization in cache enabled multi cell cooperative networks"
    - "edge caching for coverage and capacity aided heterogeneous networks"
    - "content centric sparse multicast beamforming for cache enabled cloud ran"

Connected through hyperedge HE-5 (induced by source paper "a novel mobile edge network architecture with joint caching delivering and horizontal cooperation"):
  with members:
    - "a survey on mobile edge computing the communication perspective"
    - "mobility aware caching for content centric wireless networks modeling and methodology"
    - "optimization and analysis of probabilistic caching in n tier heterogeneous networks"
    - "analysis and optimization of caching and multicasting in large scale cache enabled heterogeneous wireless networks"
    - "cooperative caching and transmission design in cluster centric small cell networks"
    - "cache enabled heterogeneous cellular networks optimal tier level content placement"
    - "analysis on cache enabled wireless heterogeneous networks"
    - "5g wireless backhaul networks challenges and research advances"

Connected through hyperedge HE-6 (induced by source paper "optimal cache leasing from a mobile network operator to a content provider"):
  with members:
    - "fair distributed user traffic association in cache equipped cellular networks"
    - "wireless caching technical misconceptions and business barriers"
    - "stochastic dynamic cache partitioning for encrypted content delivery"
    - "optimal geographic caching in cellular networks"
    - "cache enabled small cell networks modeling and tradeoffs"
    - "exploring the memory bandwidth tradeoff in an information centric network"

Connected through hyperedge HE-7 (induced by source paper "multi agent learning for cooperative large scale caching networks"):
  with members:
    - "a low complexity approach to distributed cooperative caching with geographic constraints"
    - "spatial multi lru caching for wireless networks with coverage overlaps"
    - "content caching and delivery over heterogeneous wireless networks"
    - "learning based optimization of cache content in a small cell base station"
    - "analyzing the performance of lru caches under non stationary traffic patterns"

Connected through hyperedge HE-8 (induced by source paper "joint data compression and caching approaching optimality with guarantees"):
  with members:
    - "jointly optimal routing and caching for arbitrary network topologies"
    - "what when and where to cache a unified optimization approach"
    - "network cache design under stationary requests exact analysis and poisson approximation"
    - "accurate learning or fast mixing dynamic adaptability of caching algorithms"
    - "adaptive caching networks with optimality guarantees"

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)