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 simple cooperative diversity method based on network path selection"
  Abstract: Cooperative diversity has been recently proposed as a way to form virtual antenna arrays that provide dramatic gains in slow fading wireless environments. However, most of the proposed solutions require distributed space-time coding algorithms, the careful design of which is left for future investigation if there is more than one cooperative relay. We propose a novel scheme that alleviates these problems and provides diversity gains on the order of the number of relays in the network. Our scheme first selects the best relay from a set of M available relays and then uses this "best" relay for cooperation between the source and the destination. We develop and analyze a distributed method to select the best relay that requires no topology information and is based on local measurements of the instantaneous channel conditions. This method also requires no explicit communication among the relays. The success (or failure) to select the best available path depends on the statistics of the wireless channel, and a methodology to evaluate performance for any kind of wireless channel statistics, is provided. Information theoretic analysis of outage probability shows that our scheme achieves the same diversity-multiplexing tradeoff as achieved by more complex protocols, where coordination and distributed space-time coding for M relay nodes is required, such as those proposed by Laneman and Wornell (2003). The simplicity of the technique allows for immediate implementation in existing radio hardware and its adoption could provide for improved flexibility, reliability, and efficiency in future 4G wireless systems.

Connected through hyperedge HE-1 (induced by source paper "dynwalks global topology and recent changes awareness dynamic network embedding"):
  with members:
    - "dyngem deep embedding method for dynamic graphs"
    - "dynnode2vec scalable dynamic network embedding"
    - "streaming network embedding through local actions"
    - "timers error bounded svd restart on dynamic networks"
    - "representation learning on graphs methods and applications"
    - "a survey on network embedding"
    - "scalable temporal latent space inference for link prediction in dynamic social networks"
    - "node2vec scalable feature learning for networks"

Connected through hyperedge HE-2 (induced by source paper "joint power splitting and relay selection in energy harvesting communications for iot networks"):
  with members:
    - "when internet of things meets blockchain challenges in distributed consensus"
    - "cooperative ambient backscatter communications for green internet of things"
    - "optimization of a power splitting protocol for two way multiple energy harvesting relay system"
    - "incentive mechanism design for wireless energy harvesting based internet of things"
    - "practical non linear energy harvesting model and resource allocation for swipt systems"
    - "optimal cooperative power allocation for energy harvesting enabled relay networks"
    - "outage probability of energy harvesting relay aided cooperative networks over rayleigh fading channel"
    - "power allocation strategies in energy harvesting wireless cooperative networks"

Connected through hyperedge HE-3 (induced by source paper "aeronautical ad hoc networking for the internet above the clouds"):
  with members:
    - "optimizing space air ground integrated networks by artificial intelligence"
    - "regularized zero forcing precoding aided adaptive coding and modulation for large scale antenna array based air to air communications"
    - "a survey of multi objective optimization in wireless sensor networks metrics algorithms and open problems"
    - "optical communication in space challenges and mitigation techniques"
    - "adaptive coding and modulation for large scale antenna array based aeronautical communications in the presence of co channel interference"
    - "survey of important issues in uav communication networks"
    - "on the security of the automatic dependent surveillance broadcast protocol"
    - "security challenges in mobile ad hoc networks a survey"

Connected through hyperedge HE-4 (induced by source paper "system outage performance for three step two way energy harvesting df relaying"):
  with members:
    - "heterogeneous power splitting based two way df relaying with non linear energy harvesting"
    - "optimization of a power splitting protocol for two way multiple energy harvesting relay system"
    - "simultaneous information and energy flow for iot relay systems with crowd harvesting"
    - "simultaneous wireless information and power transfer in modern communication systems"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "relaying protocols for wireless energy harvesting and information processing"

Connected through hyperedge HE-5 (induced by source paper "optimal combining and performance analysis for two way eh relay systems with tdbc protocol"):
  with members:
    - "outage analysis for swipt enabled two way cognitive cooperative communications"
    - "heterogeneous power splitting based two way df relaying with non linear energy harvesting"
    - "energy efficient precoding design for swipt in mimo two way relay networks"
    - "simultaneous information and energy flow for iot relay systems with crowd harvesting"

Connected through hyperedge HE-6 (induced by source paper "sensing throughput tradeoff for superior selective reporting based spectrum sensing in energy harvesting hcrns"):
  with members:
    - "an overview of sustainable green 5g networks"
    - "energy management and cross layer optimization for wireless sensor network powered by heterogeneous energy sources"
    - "on green energy powered cognitive radio networks"

Connected through hyperedge HE-7 (induced by source paper "a simple receive diversity technique for distributed beamforming"):
  with members:
    - "on the minimum decoding delay of balanced complex orthogonal designs"
    - "massive mimo for next generation wireless systems"
    - "opportunistic collaborative beamforming with one bit feedback"

Connected through hyperedge HE-8 (induced by source paper "alternate distributed beamforming for decode and forward multi relay systems using buffers"):
  with members:
    - "buffer aided relaying with adaptive link selection"
    - "using superposition codebooks and partial decode and forward in low snr parallel relay networks"
    - "recovering multiplexing loss through successive relaying using repetition coding"

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)