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: "downlink coordinated multi point with overhead modeling in heterogeneous cellular networks"
  Abstract: Coordinated multi-point (CoMP) communication is attractive for heterogeneous cellular networks (HCNs) for interference reduction. However, previous approaches to CoMP face two major hurdles in HCNs. First, they usually ignore the inter-cell overhead messaging delay, although it results in an irreducible performance bound. Second, they consider the grid or Wyner model for base station locations, which is not appropriate for HCN BS locations which are numerous and haphazard. Even for conventional macrocell networks without overlaid small cells, SINR results are not tractable in the grid model nor accurate in the Wyner model. To overcome these hurdles, we develop a novel analytical framework which includes the impact of overhead delay for CoMP evaluation in HCNs. This framework can be used for a class of CoMP schemes without user data sharing. As an example, we apply it to downlink CoMP zero-forcing beamforming (ZFBF), and see significant divergence from previous work. For example, we show that CoMP ZFBF does not increase throughput when the overhead channel delay is larger than 60% of the channel coherence time. We also find that, in most cases, coordinating with only one other cell is nearly optimum for downlink CoMP ZFBF.

Connected through hyperedge HE-1 (induced by source paper "fundamentals of simultaneous wireless information and power transmission in heterogeneous networks a cell load perspective"):
  with members:
    - "modeling and analysis of cellular networks using stochastic geometry a tutorial"
    - "wireless power transfer in massive mimo aided hetnets with user association"
    - "fundamentals of the downlink green coverage and energy efficiency in heterogeneous networks"
    - "traffic management for heterogeneous networks with opportunistic unlicensed spectrum sharing"
    - "on the limits of coexisting coverage and capacity in multi rat heterogeneous networks"
    - "random cell association and void probability in poisson distributed cellular networks"
    - "optimal cell load and throughput in green small cell networks with generalized cell association"
    - "wireless networks with rf energy harvesting a contemporary survey"

Connected through hyperedge HE-2 (induced by source paper "coverage rate tradeoff in mmwave heterogeneous networks with generalized user association"):
  with members:
    - "downlink and uplink cell association with traditional macrocells and millimeter wave small cells"
    - "user association in 5g networks a survey and an outlook"
    - "physical layer security in millimeter wave cellular networks"
    - "gains of restricted secondary licensing in millimeter wave cellular systems"
    - "stochastic geometry modeling and performance evaluation of mmwave cellular communications"
    - "optimal cell load and throughput in green small cell networks with generalized cell association"
    - "on the feasibility of sharing spectrum licenses in mmwave cellular systems"
    - "tractable model for rate in self backhauled millimeter wave cellular networks"

Connected through hyperedge HE-3 (induced by source paper "full duplex heterogeneous networks with decoupled user association rate analysis and traffic scheduling"):
  with members:
    - "user selection and power allocation in full duplex multicell networks"
    - "downlink and uplink decoupling in two tier heterogeneous networks with multi antenna base stations"
    - "optimal joint power and subcarrier allocation for full duplex multicarrier non orthogonal multiple access systems"
    - "fundamentals of the downlink green coverage and energy efficiency in heterogeneous networks"
    - "traffic management for heterogeneous networks with opportunistic unlicensed spectrum sharing"
    - "full duplex mimo small cell networks with interference cancellation"
    - "on the limits of coexisting coverage and capacity in multi rat heterogeneous networks"
    - "random cell association and void probability in poisson distributed cellular networks"

Connected through hyperedge HE-4 (induced by source paper "heterogeneous networks with power domain noma coverage throughput and power allocation analysis"):
  with members:
    - "power domain non orthogonal multiple access noma in 5g systems potentials and challenges"
    - "non orthogonal multiple access in large scale heterogeneous networks"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"
    - "nonorthogonal multiple access in large scale underlay cognitive radio networks"
    - "on the spectral efficiency and security enhancements of noma assisted multicast unicast streaming"
    - "energy efficient transmission design in non orthogonal multiple access"
    - "fundamentals of the downlink green coverage and energy efficiency in heterogeneous networks"
    - "cooperative non orthogonal multiple access with simultaneous wireless information and power transfer"

Connected through hyperedge HE-5 (induced by source paper "traffic management for heterogeneous networks with opportunistic unlicensed spectrum sharing"):
  with members:
    - "modeling and analyzing the coexistence of wi fi and lte in unlicensed spectrum"
    - "fundamentals of the downlink green coverage and energy efficiency in heterogeneous networks"
    - "on the limits of coexisting coverage and capacity in multi rat heterogeneous networks"
    - "coexisting success probability and throughput of multi rat wireless networks with unlicensed band access"
    - "random cell association and void probability in poisson distributed cellular networks"
    - "small cell traffic balancing over licensed and unlicensed bands"
    - "optimal cell load and throughput in green small cell networks with generalized cell association"
    - "coexistence of wi fi and heterogeneous small cell networks sharing unlicensed spectrum"

Connected through hyperedge HE-6 (induced by source paper "on the limits of coexisting coverage and capacity in multi rat heterogeneous networks"):
  with members:
    - "fundamentals of the downlink green coverage and energy efficiency in heterogeneous networks"
    - "coexisting success probability and throughput of multi rat wireless networks with unlicensed band access"
    - "random cell association and void probability in poisson distributed cellular networks"
    - "next generation m2m cellular networks challenges and practical considerations"
    - "optimal cell load and throughput in green small cell networks with generalized cell association"
    - "coexistence of wi fi and heterogeneous small cell networks sharing unlicensed spectrum"
    - "adaptive downlink comp in heterogeneous cellular networks with imperfect overhead messaging"
    - "heterogeneous cellular networks with flexible cell association a comprehensive downlink sinr analysis"

Connected through hyperedge HE-7 (induced by source paper "generalized sir analysis for stochastic heterogeneous wireless networks theory and applications"):
  with members:
    - "understanding the iot connectivity landscape a contemporary m2m radio technology roadmap"
    - "optimal cell load and throughput in green small cell networks with generalized cell association"
    - "optimal discrete power control in poisson clustered ad hoc networks"
    - "the performance of successive interference cancellation in random wireless networks"
    - "multi antenna communication in ad hoc networks achieving mimo gains with simo transmission"
    - "ergodic transmission capacity of wireless ad hoc networks with interference management"
    - "two way transmission capacity of wireless ad hoc networks"
    - "fractional power control for decentralized wireless networks"

Connected through hyperedge HE-8 (induced by source paper "user centric interference nulling in downlink multi antenna heterogeneous networks"):
  with members:
    - "the mean interference to signal ratio and its key role in cellular and amorphous networks"
    - "user centric intercell interference nulling for downlink small cell networks"
    - "a tractable model for noncoherent joint transmission base station cooperation"
    - "analysis and optimization of inter tier interference coordination in downlink multi antenna hetnets with offloading"
    - "massive mimo meets hetnet interference coordination through spatial blanking"
    - "location aware cross tier coordinated multipoint transmission in two tier cellular networks"
    - "a stochastic geometry analysis of inter cell interference coordination and intra cell diversity"
    - "interference coordination random clustering and adaptive limited feedback"

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)