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: "optimized performance evaluation of lte hard handover algorithm with average rsrp constraint"
  Abstract: Hard handover mechanism is adopted to be used in 3GPP Long Term Evolution (3GPP LTE) in order to#R##N#reduce the complexity of the LTE network architecture. This mechanism comes with degradation in#R##N#system throughput as well as a higher system delay. This paper proposes a new handover algorithm#R##N#known as LTE Hard Handover Algorithm with Average Received Signal Reference Power (RSRP)#R##N#Constraint (LHHAARC) in order to minimize number of handovers and the system delay as well as#R##N#maximize the system throughput. An optimized system performance of the LHHAARC is evaluated and#R##N#compared with three well-known handover algorithms via computer simulation. The simulation results#R##N#show that the LHHAARC outperforms three well-known handover algorithms by having less number of#R##N#average handovers per UE per second, shorter total system delay whilst maintaining a higher total#R##N#system throughput.

Connected through hyperedge HE-1 (induced by source paper "statistical model of downlink power consumption in cellular cdma networks"):
  with members:
    - "interference mitigation using uplink power control for 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)