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: "system level modeling and optimization of the energy efficiency in cellular networks a stochastic geometry framework"
  Abstract: In this paper, we analyze and optimize the energy efficiency of downlink cellular networks. With the aid of tools from stochastic geometry, we introduce a new closed-form analytical expression of the potential spectral efficiency (bit/sec/m$^2$). In the interference-limited regime for data transmission, unlike currently available mathematical frameworks, the proposed analytical formulation depends on the transmit power and deployment density of the base stations. This is obtained by generalizing the definition of coverage probability and by accounting for the sensitivity of the receiver not only during the decoding of information data, but during the cell association phase as well. Based on the new formulation of the potential spectral efficiency, the energy efficiency (bit/Joule) is given in a tractable closed-form formula. An optimization problem is formulated and is comprehensively studied. It is mathematically proved, in particular, that the energy efficiency is a unimodal and strictly pseudo-concave function in the transmit power, given the density of the base stations, and in the density of the base stations, given the transmit power. Under these assumptions, therefore, a unique transmit power and density of the base stations exist, which maximize the energy efficiency. Numerical results are illustrated in order to confirm the obtained findings and to prove the usefulness of the proposed framework for optimizing the network planning and deployment of cellular networks from the energy efficiency standpoint.

Connected through hyperedge HE-1 (induced by source paper "smart radio environments empowered by ai reconfigurable meta surfaces an idea whose time has come"):
  with members:
    - "a novel communication paradigm for high capacity and security via programmable indoor wireless environments in next generation wireless systems"
    - "reflection probability in wireless networks with metasurface coated environmental objects an approach based on random spatial processes"
    - "a tractable analysis of the blind spot probability in localization networks under correlated blocking"
    - "using any surface to realize a new paradigm for wireless communications"
    - "wireless network intelligence at the edge"
    - "medium access control in wireless network on chip a context analysis"
    - "beyond massive mimo the potential of positioning with large intelligent surfaces"
    - "realizing wireless communication through software defined hypersurface environments"

Connected through hyperedge HE-2 (induced by source paper "energy efficient power and channel allocation in underlay device to multi device communications"):
  with members:
    - "optimal resource allocation in multicast device to device communications underlaying lte networks"
    - "radio resource allocation for device to device underlay communication using hypergraph theory"
    - "a tractable framework for the analysis of dense heterogeneous cellular networks"
    - "energy efficient power control a look at 5g wireless technologies"
    - "gaussian approximation for the downlink interference in heterogeneous cellular networks"
    - "device to device millimeter wave communications interference coverage rate and finite topologies"
    - "modeling and performance analysis of clustered device to device networks"
    - "an analytical framework for device to device communication in cellular networks"

Connected through hyperedge HE-3 (induced by source paper "reflection probability in wireless networks with metasurface coated environmental objects an approach based on random spatial processes"):
  with members:
    - "using any surface to realize a new paradigm for wireless communications"
    - "realizing wireless communication through software defined hypersurface environments"
    - "beyond massive mimo the potential of data transmission with large intelligent surfaces"
    - "towards a circular economy via intelligent metamaterials"
    - "the intensity matching approach a tractable stochastic geometry approximation to system level analysis of cellular networks"
    - "stochastic geometry modeling and analysis of multi tier millimeter wave cellular networks"
    - "increasing indoor spectrum sharing capacity using smart reflect array"
    - "stochastic geometry modeling of cellular networks analysis simulation and experimental validation"

Connected through hyperedge HE-4 (induced by source paper "analysis of transmission rate of wireless networks under the broadcast approach with continuum of transmission layers"):
  with members:
    - "a unified asymptotic analysis of area spectral efficiency in ultradense cellular networks"
    - "a tractable approach to coverage and rate in cellular networks"
    - "an overview of the transmission capacity of wireless networks"

Connected through hyperedge HE-5 (induced by source paper "treating interference as noise in cellular networks a stochastic geometry approach"):
  with members:
    - "downlink and uplink decoupling in two tier heterogeneous networks with multi antenna base stations"
    - "backscatter communications for the internet of things a stochastic geometry approach"
    - "enhanced cellular coverage and throughput using rateless codes"
    - "analytical modeling of interference aware power control for the uplink of heterogeneous cellular networks"
    - "stochastic geometry modeling and analysis of multi tier millimeter wave cellular networks"
    - "optimality of treating interference as noise a combinatorial perspective"
    - "coverage and rate analysis for millimeter wave cellular networks"
    - "on off macrocells and load balancing in heterogeneous cellular networks"

Connected through hyperedge HE-6 (induced by source paper "adaptive transmission in cellular networks do physical layer rateless codes supersede power control"):
  with members:
    - "rate statistics in cellular downlink phy rateless vs adaptive modulation and coding"
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "the meta distribution of the sir for cellular networks with power control"
    - "spatiotemporal stochastic modeling of iot enabled cellular networks scalability and stability analysis"
    - "enhanced cellular coverage and throughput using rateless codes"
    - "downlink coordinated joint transmission for mutual information accumulation"
    - "user point processes in cellular networks"
    - "rate splitting for mimo wireless networks a promising phy layer strategy for lte evolution"

Connected through hyperedge HE-7 (induced by source paper "swipt based real time mobile computing systems a stochastic geometry perspective"):
  with members:
    - "a stochastic geometry analysis of energy harvesting in large scale wireless networks"
    - "on the effect of blockage objects in dense mimo swipt networks"
    - "computation rate maximization for wireless powered mobile edge computing with binary computation offloading"
    - "a survey on mobile edge computing the communication perspective"
    - "joint offloading and computing optimization in wireless powered mobile edge computing systems"
    - "a fundamental tradeoff between computation and communication in distributed computing"
    - "mimo cellular networks with simultaneous wireless information and power transfer"
    - "wireless networks with rf energy harvesting a contemporary survey"

Connected through hyperedge HE-8 (induced by source paper "accuracy of distance based ranking of users in the analysis of noma systems"):
  with members:
    - "downlink non orthogonal multiple access noma in poisson networks"
    - "cooperative harq assisted noma scheme in large scale d2d networks"
    - "the meta distribution of the sir for cellular networks with power control"
    - "user point processes in cellular networks"
    - "energy efficiency of distributed signal processing in wireless networks a cross layer analysis"
    - "a general mimo framework for noma downlink and uplink transmission based on signal alignment"
    - "downlink capacity and base station density in cellular 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)