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: "on the throughput of secure hybrid arq protocols for gaussian block fading channels"
  Abstract: The focus of this paper is an information-theoretic study of retransmission protocols for reliable packet communication under a secrecy constraint. The hybrid automatic retransmission request (HARQ) protocol is revisited for a block-fading wiretap channel. Here, two legitimate users communicate over a block-fading channel in the presence of a passive eavesdropper who intercepts the transmissions through an independent block-fading channel. In this model, the transmitter obtains a 1-bit ACK/NACK feedback from the legitimate receiver via an error-free public channel. Both reliability and confidentiality of secure HARQ protocols are studied through the joint consideration of channel coding, secrecy coding, and retransmission protocols. In particular, the error and secrecy performance of repetition time diversity (RTD) and incremental redundancy (INR) protocols are investigated based on Wyner code sequences. These protocols ensure that the confidential message is decoded successfully by the legitimate receiver and is kept completely secret from the eavesdropper for a set of channel realizations. This paper illustrates that there exists a rate-compatible Wyner code family which ensures a secure INR protocol. Further, it defines the connection outage and secrecy outage probabilities to characterize the tradeoff between the reliability of the legitimate communication link and the confidentiality with respect to the eavesdropper's link. For a given connection/secrecy outage probability pair, an achievable throughput of secure HARQ protocols is derived for block-fading channels. Finally, both asymptotic analysis and numerical calculations demonstrate the benefits of HARQ protocols to throughput and secrecy.

Connected through hyperedge HE-1 (induced by source paper "tradeoff between delay and physical layer security in wireless networks"):
  with members:
    - "when mmwave communications meet network densification a scalable interference coordination perspective"
    - "secure transmission with large numbers of antennas and finite alphabet inputs"
    - "5g software defined vehicular networks"
    - "toward a tractable delay analysis in ultra dense networks"
    - "heterogeneous cellular networks with spatio temporal traffic delay analysis and scheduling"
    - "secure massive mimo transmission with an active eavesdropper"
    - "5g ultra dense cellular networks"
    - "performance laws of large heterogeneous cellular networks"

Connected through hyperedge HE-2 (induced by source paper "security reliability tradeoff for distributed antenna systems in heterogeneous cellular networks"):
  with members:
    - "game based approach for qos provisioning and interference management in heterogeneous networks"
    - "intelligent interference exploitation for heterogeneous cellular networks against eavesdropping"
    - "energy efficiency analysis of heterogeneous cellular networks with extra cell range expansion"
    - "secrecy optimized resource allocation for device to device communication underlaying heterogeneous networks"
    - "safeguarding decentralized wireless networks using full duplex jamming receivers"
    - "optimal beamforming for gaussian mimo wiretap channels with two transmit antennas"
    - "relay selection for wireless communications against eavesdropping a security reliability trade off perspective"
    - "a survey on wireless security technical challenges recent advances and future trends"

Connected through hyperedge HE-3 (induced by source paper "intelligent interference exploitation for heterogeneous cellular networks against eavesdropping"):
  with members:
    - "robust and secure resource allocation for full duplex miso multicarrier noma systems"
    - "physical layer security in wireless ad hoc networks under a hybrid full half duplex receiver deployment strategy"
    - "safeguarding decentralized wireless networks using full duplex jamming receivers"
    - "power constrained secrecy rate maximization for joint relay and jammer selection assisted wireless networks"
    - "relay selection for wireless communications against eavesdropping a security reliability trade off perspective"
    - "physical layer security for spectrum sharing systems"
    - "on secrecy performance of antenna selection aided mimo systems against eavesdropping"
    - "analytical modeling of interference aware power control for the uplink of heterogeneous cellular networks"

Connected through hyperedge HE-4 (induced by source paper "stochastic geometry based comparison of secrecy enhancement techniques in d2d networks"):
  with members:
    - "modeling and performance analysis of clustered device to device networks"
    - "d2d enhanced heterogeneous cellular networks with dynamic tdd"
    - "cognitive and energy harvesting based d2d communication in cellular networks stochastic geometry modeling and analysis"
    - "physical layer security in downlink multi antenna cellular networks"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"
    - "on the throughput cost of physical layer security in decentralized wireless networks"
    - "secure transmission with artificial noise over fading channels achievable rate and optimal power allocation"

Connected through hyperedge HE-5 (induced by source paper "secure communication through wireless powered friendly jamming jointly online optimization over geography energy and time"):
  with members:
    - "secrecy wireless information and power transfer in fading wiretap channel"
    - "wireless powered communication opportunities and challenges"
    - "wireless powered relays in cooperative communications time switching relaying protocols and throughput analysis"
    - "robust beamforming for secure communication in systems with wireless information and power transfer"
    - "secrecy wireless information and power transfer with miso beamforming"
    - "principles of physical layer security in multiuser wireless networks a survey"
    - "secure communication with a wireless powered friendly jammer"
    - "throughput maximization in wireless powered communication networks"

Connected through hyperedge HE-6 (induced by source paper "rate adaptation for secure harq protocols"):
  with members:
    - "fundamental limits of communication with low probability of detection"
    - "covert communication over noisy channels a resolvability perspective"
    - "adaptive cross packet harq"
    - "harq buffer management an information theoretic view"
    - "semantic security capacity for wiretap channels of type ii"
    - "block fading channels with delayed csit at finite blocklength"
    - "effective secrecy reliability confusion and stealth"
    - "coding with scrambling concatenation and harq for the awgn wire tap channel a security gap analysis"

Connected through hyperedge HE-7 (induced by source paper "joint relay and jammer selection improves the physical layer security in the face of csi feedback delays"):
  with members:
    - "security versus reliability analysis of opportunistic relaying"
    - "wireless physical layer security with imperfect channel state information a survey"
    - "optimal relay selection for physical layer security in cooperative wireless networks"
    - "joint relay and jammer selection for secure two way relay networks"
    - "rethinking the secrecy outage formulation a secure transmission design perspective"
    - "cooperative jamming for secure communications in mimo relay networks"
    - "robust beamforming for security in mimo wiretap channels with imperfect csi"
    - "relay beamforming strategies for physical layer security"

Connected through hyperedge HE-8 (induced by source paper "relay selection for wireless communications against eavesdropping a security reliability trade off perspective"):
  with members:
    - "improving physical layer security in wireless communications using diversity techniques"
    - "securing physical layer communications for cognitive radio networks"
    - "security versus reliability analysis of opportunistic relaying"
    - "semantically secure lattice codes for the gaussian wiretap channel"
    - "optimal relay selection for physical layer security in cooperative wireless networks"
    - "robust beamforming for security in mimo wiretap channels with imperfect csi"

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)