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: "energy efficient resource allocation for device to device underlay communication"
  Abstract: Device-to-device (D2D) communication underlaying cellular networks is expected to bring significant benefits for utilizing resources, improving user throughput, and extending the battery life of user equipment. However, the allocation of radio and power resources to D2D communication needs elaborate coordination, as D2D communication can cause interference to cellular communication. In this paper, we study joint channel and power allocation to improve the energy efficiency of user equipments. To solve the problem efficiently, we introduce an iterative combinatorial auction algorithm, where the D2D users are considered bidders that compete for channel resources and the cellular network is treated as the auctioneer. We also analyze important properties of D2D underlay communication and present numerical simulations to verify the proposed algorithm.

Connected through hyperedge HE-1 (induced by source paper "distributed artificial intelligence solution for d2d communication in 5g networks"):
  with members:
    - "a survey of conventional and artificial intelligence learning based resource allocation and interference mitigation schemes in d2d enabled networks"
    - "device to device communication in cellular networks"
    - "5g cellular key enabling technologies and research challenges"

Connected through hyperedge HE-2 (induced by source paper "random gossip processes in smartphone peer to peer networks"):
  with members:
    - "gossip in a smartphone peer to peer network"
    - "how to discreetly spread a rumor in a crowd"
    - "tight bounds for rumor spreading with vertex expansion"

Connected through hyperedge HE-3 (induced by source paper "when distributed outperforms centralized scheduling in d2d enabled cellular networks"):
  with members:
    - "hybrid centralized distributed resource allocation for device to device communication underlaying cellular networks"
    - "performance analysis of network assisted two hop d2d communications"
    - "distributed resource allocation in device to device enhanced cellular networks"
    - "resource optimization in device to device cellular systems using time frequency hopping"
    - "efficiency resource allocation for device to device underlay communication systems a reverse iterative combinatorial auction based approach"

Connected through hyperedge HE-4 (induced by source paper "distributed vs centralized scheduling in d2d enabled cellular networks"):
  with members:
    - "hybrid centralized distributed resource allocation for device to device communication underlaying cellular networks"
    - "performance analysis of network assisted two hop d2d communications"
    - "distributed resource allocation in device to device enhanced cellular networks"
    - "efficiency resource allocation for device to device underlay communication systems a reverse iterative combinatorial auction based approach"

Connected through hyperedge HE-5 (induced by source paper "energy efficiency in mimo underlay and overlay device to device communications and cognitive radio systems"):
  with members:
    - "energy efficient power control a look at 5g wireless technologies"
    - "energy efficiency and sum rate when massive mimo meets device to device communication"
    - "dynamic power control for delay aware device to device communications"
    - "resource allocation under channel uncertainties for relay aided device to device communication underlaying lte a cellular networks"
    - "energy efficiency and spectral efficiency tradeoff in device to device d2d communications"
    - "designing multi user mimo for energy efficiency when is massive mimo the answer"
    - "cognitive beamforming for multiple secondary data streams with individual snr constraints"
    - "efficiency resource allocation for device to device underlay communication systems a reverse iterative combinatorial auction based approach"

Connected through hyperedge HE-6 (induced by source paper "pilot reuse among d2d users in d2d underlaid massive mimo systems"):
  with members:
    - "energy efficient joint resource allocation and power control for d2d communications"
    - "graph coloring based pilot allocation to mitigate pilot contamination for multi cell massive mimo systems"
    - "an uplink interference analysis for massive mimo systems with mrc and zf receivers"
    - "pilot reuse for massive mimo transmission over spatially correlated rayleigh fading channels"
    - "the interplay between massive mimo and underlaid d2d networking"
    - "a survey on device to device communication in cellular networks"
    - "asymptotic coverage probability and rate in massive mimo networks"
    - "a coordinated approach to channel estimation in large scale multiple antenna systems"

Connected through hyperedge HE-7 (induced by source paper "energy efficiency and sum rate tradeoffs for massive mimo systems with underlaid device to device communications"):
  with members:
    - "massive mimo ten myths and one critical question"
    - "energy efficiency and sum rate when massive mimo meets device to device communication"
    - "an analytical framework for device to device communication in cellular networks"
    - "design aspects of short range millimeter wave networks a mac layer perspective"
    - "the interplay between massive mimo and underlaid d2d networking"
    - "optimal multiuser transmit beamforming a difficult problem with a simple solution structure"
    - "spectrum sharing for device to device communication in cellular networks"
    - "multiobjective signal processing optimization the way to balance conflicting metrics in 5g systems"

Connected through hyperedge HE-8 (induced by source paper "mode selection resource allocation and power control for d2d enabled two tier cellular network"):
  with members:
    - "a survey on device to device communication in cellular networks"
    - "spectrum sharing for device to device communication in cellular networks"
    - "distributed resource allocation in device to device enhanced cellular networks"
    - "spectrum and energy efficiency evaluation of two tier femtocell networks with partially open channels"
    - "power control in two tier femtocell 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.NI(Networking and Internet Architecture)