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: "performance analysis of a mission critical portable lte system in targeted rf interference"
  Abstract: Mission-critical wireless networks are being up-graded to 4G long-term evolution (LTE). As opposed to capacity, these networks require very high reliability and security as well as easy deployment and operation in the field. Wireless communication systems have been vulnerable to jamming, spoofing and other radio frequency attacks since the early days of analog systems. Although wireless systems have evolved, important security and reliability concerns still exist. This paper presents our methodology and results for testing 4G LTE operating in harsh signaling environments. We use software-defined radio technology and open-source software to develop a fully configurable protocol-aware interference waveform. We define several test cases that target the entire LTE signal or part of it to evaluate the performance of a mission-critical production LTE system. Our experimental results show that synchronization signal interference in LTE causes significant throughput degradation at low interference power. By dynamically evaluating the performance measurement counters, the k- nearest neighbor classification method can detect the specific RF signaling attack to aid in effective mitigation.

Connected through hyperedge HE-1 (induced by source paper "csai open source cellular radio access network security analysis instrument"):
  with members:
    - "security and protocol exploit analysis of the 5g specifications"
    - "lte phy layer vulnerability analysis and testing using open source sdr tools"
    - "lte security protocol exploits and location tracking experimentation with low cost software radio"
    - "srslte an open source platform for lte evolution and experimentation"
    - "practical attacks against privacy and availability in 4g lte mobile communication systems"

Connected through hyperedge HE-2 (induced by source paper "analysis of non pilot interference on link adaptation and latency in cellular networks"):
  with members:
    - "lte phy layer vulnerability analysis and testing using open source sdr tools"
    - "narrowband iot data transmission procedures for massive machine type communications"
    - "a survey on legacy and emerging technologies for public safety communications"

Connected through hyperedge HE-3 (induced by source paper "security and protocol exploit analysis of the 5g specifications"):
  with members:
    - "defeating the downgrade attack on identity privacy in 5g"
    - "formal analysis of 5g authentication"
    - "the 5g aka authentication protocol privacy"
    - "lte phy layer vulnerability analysis and testing using open source sdr tools"
    - "extending lte into the unlicensed spectrum technical analysis of the proposed variants"
    - "lte security protocol exploits and location tracking experimentation with low cost software radio"
    - "practical attacks against privacy and availability in 4g lte mobile communication systems"
    - "five disruptive technology directions for 5g"

Connected through hyperedge HE-4 (induced by source paper "5g nr jamming spoofing and sniffing threat assessment and mitigation"):
  with members:
    - "lte phy layer vulnerability analysis and testing using open source sdr tools"
    - "on error correction performance and implementation of polar code list decoders for 5g"
    - "lte security protocol exploits and location tracking experimentation with low cost software radio"
    - "practical attacks against privacy and availability in 4g lte mobile communication systems"
    - "vulnerability of lte to hostile interference"

Connected through hyperedge HE-5 (induced by source paper "lte phy layer vulnerability analysis and testing using open source sdr tools"):
  with members:
    - "a survey on wireless security technical challenges recent advances and future trends"
    - "vulnerability of lte to hostile interference"

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)