human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "scalable and passive wireless network clock synchronization in los environments"):
  Abstract: Clock synchronization is ubiquitous in wireless systems for communication, sensing, and control. In this paper, we design a scalable system in which an indefinite number of passively receiving wireless units can synchronize to a single master clock at the level of discrete clock ticks. Accurate synchronization requires an estimate of the node positions to compensate the time-of-flight transmission delay in line-of-sight environments. If such information is available, the framework developed here takes position uncertainties into account. In the absence of such information, as in indoor scenarios, we propose an auxiliary localization mechanism. Furthermore, we derive the Cramer–Rao bounds for the system, which show that it enables synchronization accuracy at sub-nanosecond levels. Finally, we develop and evaluate an online estimation method, which is statistically efficient.

Includes members:
  Member "joint ranging and clock parameter estimation by wireless round trip time measurements":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "climex a wireless physical layer security protocol based on clocked impulse exchanges")
  Member "experimental demonstration of nanosecond accuracy wireless network synchronization":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "energy efficient time synchronization based on asynchronous source clock frequency recovery and reverse two way message exchanges in wireless sensor networks")
  Member "cooperative synchronization in wireless networks":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "optimizing reweighted belief propagation for likelihood consensus problems")
  Member "an experimental investigation of simo mimo interference alignment ia and coordinated multi point comp":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "interference alignment practical challenges and test bed implementation")
  Member "fundamentals of large sensor networks connectivity capacity clocks and computation":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "cooperative network synchronization asymptotic analysis")
  Member "femtocell networks a survey":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "robust resource allocation for pd noma based miso heterogeneous networks with comp technology")

Question: Please tell me which class the source paper 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)