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: "optimal caching and scheduling for cache enabled d2d communications"
  Abstract: To maximize offloading gain of cache-enabled device-to-device (D2D) communications, content placement and delivery should be jointly designed. In this letter, we jointly optimize caching and scheduling policies to maximize successful offloading probability, defined as the probability that a user can obtain desired file in local cache or via D2D link with data rate larger than a given threshold. We obtain the optimal scheduling factor for a random scheduling policy that can control interference in a distributed manner, and a low complexity solution to compute caching distribution. We show that the offloading gain can be remarkably improved by the joint optimization.

Connected through hyperedge HE-1 (induced by source paper "optimizing joint probabilistic caching and channel access for clustered d2d networks"):
  with members:
    - "performance analysis of mobile cellular connected drones under practical antenna configurations"
    - "detecting sybil attacks using proofs of work and location in vanets"
    - "privacy preserving smart parking system using blockchain and private information retrieval"
    - "on the reliability of wireless virtual reality at terahertz thz frequencies"
    - "privacy preserving and collusion resistant charging coordination schemes for smart grid"
    - "mimic learning to generate a shareable network intrusion detection model"
    - "mobility in the sky performance and mobility analysis for cellular connected uavs"
    - "blockchain based firmware update scheme tailored for autonomous vehicles"

Connected through hyperedge HE-2 (induced by source paper "wireless caching helper system with heterogeneous traffic and random availability"):
  with members:
    - "modeling and performance analysis of full duplex communications in cache enabled d2d networks"
    - "a survey on mobile edge networks convergence of computing caching and communications"
    - "cache enabled device to device communications offloading gain and energy cost"
    - "spatially correlated content caching for device to device communications"
    - "wireless caching technical misconceptions and business barriers"
    - "on the delay of geographical caching methods in two tiered heterogeneous networks"
    - "content caching and distribution in smart grid enabled wireless networks"
    - "energy efficiency of downlink networks with caching at base stations"

Connected through hyperedge HE-3 (induced by source paper "joint caching and resource allocation in d2d assisted wireless hetnet"):
  with members:
    - "cache placement in two tier hetnets with limited storage capacity cache or buffer"
    - "inter cluster cooperation for wireless d2d caching networks"
    - "a delay aware caching algorithm for wireless d2d caching networks"
    - "cooperation in 5g hetnets advanced spectrum access and d2d assisted communications"
    - "wireless device to device caching networks basic principles and system performance"
    - "optimization and analysis of probabilistic caching in n tier heterogeneous networks"
    - "mode selection resource allocation and power control for d2d enabled two tier cellular network"
    - "analysis on cache enabled wireless heterogeneous networks"

Connected through hyperedge HE-4 (induced by source paper "optimal and scalable caching for 5g using reinforcement learning of space time popularities"):
  with members:
    - "ultra dense edge caching under spatio temporal demand and network dynamics"
    - "context aware proactive content caching with service differentiation in wireless networks"
    - "wireless device to device caching networks basic principles and system performance"
    - "wireless caching technical misconceptions and business barriers"
    - "a learning based approach to caching in heterogenous small cell networks"
    - "placing dynamic content in caches with small population"
    - "continuous control with deep reinforcement learning"
    - "optimal geographic caching in cellular networks"

Connected through hyperedge HE-5 (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"
    - "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"
    - "analysis on cache enabled wireless heterogeneous networks"

Connected through hyperedge HE-6 (induced by source paper "on minimizing energy consumption for d2d clustered caching networks"):
  with members:
    - "inter cluster cooperation for wireless d2d caching networks"
    - "delay analysis for wireless d2d caching with inter cluster cooperation"
    - "spatially correlated content caching for device to device communications"
    - "energy efficiency of downlink networks with caching at base stations"
    - "modeling and performance analysis of clustered device to device networks"
    - "asymptotics and approximation of the sir distribution in general cellular networks"
    - "optimal geographic caching in cellular networks"
    - "base station assisted device to device communications for high throughput wireless video networks"

Connected through hyperedge HE-7 (induced by source paper "learning based delay aware caching in wireless d2d caching networks"):
  with members:
    - "wireless device to device caching networks basic principles and system performance"
    - "wireless caching technical misconceptions and business barriers"
    - "cluster content caching an energy efficient approach to improve quality of service in cloud radio access networks"
    - "a survey on device to device communication in cellular networks"
    - "on the average performance of caching and coded multicasting with random demands"
    - "living on the edge the role of proactive caching in 5g wireless networks"

Connected through hyperedge HE-8 (induced by source paper "cache enabled device to device communications offloading gain and energy cost"):
  with members:
    - "wireless device to device caching networks basic principles and system performance"
    - "cache enabled heterogeneous cellular networks comparison and tradeoffs"
    - "energy efficiency of downlink networks with caching at base stations"
    - "energy costs for traffic offloading by cache enabled d2d communications"
    - "a survey on device to device communication in cellular networks"
    - "living on the edge the role of proactive caching in 5g wireless networks"
    - "base station assisted device to device communications for high throughput wireless video networks"
    - "exploring social ties for enhanced device to device communications in wireless networks"

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)