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: "power control in cognitive radio networks how to cross a multi lane highway"
  Abstract: We consider power control in cognitive radio networks where secondary users identify and exploit instantaneous and local spectrum opportunities without causing unacceptable interference to primary users. We qualitatively characterize the impact of the transmission power of secondary users on the occurrence of spectrum opportunities and the reliability of opportunity detection. Based on a Poisson model of the primary network, we quantify these impacts by showing that (i) the probability of spectrum opportunity decreases exponentially with respect to the transmission power of secondary users, where the exponential decay constant is given by the traffic load of primary users; (ii) reliable opportunity detection is achieved in the two extreme regimes in terms of the ratio between the transmission power of secondary users and that of primary users. Such analytical characterizations allow us to study power control for optimal transport throughput under constraints on the interference to primary users. Furthermore, we reveal the difference between detecting primary signals and detecting spectrum opportunities, and demonstrate the complex relationship between physical layer spectrum sensing and MAC layer throughput. The dependency of this PHY-MAC interaction on the application type and the use of handshake signaling such as RTS/CTS is illustrated.

Connected through hyperedge HE-1 (induced by source paper "spreading information in mobile wireless networks"):
  with members:
    - "downlink capacity and base station density in cellular networks"
    - "a tractable approach to coverage and rate in cellular networks"

Connected through hyperedge HE-2 (induced by source paper "on the performance of adaptive modulation in cognitive radio networks"):
  with members:
    - "optimal power allocation for fading channels in cognitive radio networks ergodic capacity and outage capacity"
    - "spectral efficiency of spectrum pooling systems"

Connected through hyperedge HE-3 (induced by source paper "downlink capacity and base station density in cellular networks"):
  with members:
    - "analytical modeling of uplink cellular networks"
    - "protocol level understanding of the aggregate interference in random csma ca networks"
    - "modeling and analysis of k tier downlink heterogeneous cellular networks"
    - "a stochastic geometry approach to coverage in cellular networks with multi cell cooperation"
    - "a tractable approach to coverage and rate in cellular networks"
    - "femtocell networks a survey"
    - "uplink capacity and interference avoidance for two tier femtocell networks"

Connected through hyperedge HE-4 (induced by source paper "worst case robust distributed power allocation in shared unlicensed spectrum"):
  with members:
    - "robust rate maximization game under bounded channel uncertainty"
    - "optimal power allocation for fading channels in cognitive radio networks ergodic capacity and outage capacity"
    - "optimal linear precoding strategies for wideband noncooperative systems based on game theory part i nash equilibria"
    - "competitive design of multiuser mimo systems based on game theory a unified view"
    - "on peak versus average interference power constraints for protecting primary users in cognitive radio networks"
    - "optimal linear precoding strategies for wideband non cooperative systems based on game theory part ii algorithms"

Connected through hyperedge HE-5 (induced by source paper "on the connectivity and multihop delay of ad hoc cognitive radio networks"):
  with members:
    - "cognitive networks achieve throughput scaling of a homogeneous network"
    - "information propagation speed in mobile and delay tolerant networks"
    - "connectivity percolation and information dissemination in large scale wireless networks with dynamic links"
    - "bandwidth partitioning in decentralized wireless networks"
    - "scaling laws for overlaid wireless networks a cognitive radio network vs a primary network"
    - "scaling laws of cognitive networks"

Connected through hyperedge HE-6 (induced by source paper "connectivity of heterogeneous wireless networks"):
  with members:
    - "connectivity percolation and information dissemination in large scale wireless networks with dynamic links"
    - "on the connectivity and multihop delay of ad hoc cognitive radio 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)