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: "grant free radio access for short packet communications over 5g networks"
  Abstract: Radio access management plays a vital role in delay and energy consumption of connected devices. The radio access in existing cellular networks is unable to efficiently support massive connectivity, due to its signaling overhead. In this paper, we investigate an asynchronous grant-free narrowband data transmission protocol that aims to provide low energy consumption and delay, by relaxing the synchronization/reservation requirement at the cost of sending several packet copies at the transmitter side and more complex signal processing at the receiver side. Specifically, the timing and frequency offsets, as well as sending of multiple replicas of the same packet, are exploited as form of diversities at the receiver-side to trigger successive interference cancellation. The proposed scheme is investigated by deriving closed-form expressions for key performance indicators, including reliability and battery-lifetime. The performance evaluation indicates that the scheme can be tuned to realize long battery lifetime radio access for low-complexity devices. The obtained results indicate existence of traffic load regions, where synchronous access outperforms asynchronous access and vice versa.

Connected through hyperedge HE-1 (induced by source paper "space diversity based grant free random access for critical and non critical iot services"):
  with members:
    - "multiple relay slotted aloha performance analysis and bounds"
    - "modern random access for beyond 5g systems a multiple relay aloha perspective"
    - "information centric grant free access for iot fog networks edge vs cloud detection and learning"
    - "non orthogonal multiplexing of ultra reliable and broadband services in fog radio architectures"
    - "5g wireless network slicing for embb urllc and mmtc a communication theoretic view"
    - "grant free radio access iot networks scalability analysis in coexistence scenarios"
    - "two user erasure interference channels with local delayed csit"
    - "coded slotted aloha a graph based method for uncoordinated multiple access"

Connected through hyperedge HE-2 (induced by source paper "study of adaptive activity aware iterative detection techniques for massive machine type communications"):
  with members:
    - "5g wireless network slicing for embb urllc and mmtc a communication theoretic view"
    - "sparse signal processing for grant free massive connectivity a future paradigm for random access protocols in the internet of things"
    - "iterative detection and decoding algorithms for mimo systems in block fading channels using ldpc codes"
    - "compressed sensing for wireless communications useful tips and tricks"

Connected through hyperedge HE-3 (induced by source paper "study of activity aware multiple feedback successive interference cancellation for massive machine type communications"):
  with members:
    - "massive connectivity with massive mimo part i device activity detection and channel estimation"
    - "iterative detection and decoding algorithms for mimo systems in block fading channels using ldpc codes"
    - "sparsity aware adaptive algorithms based on alternating optimization with shrinkage"

Connected through hyperedge HE-4 (induced by source paper "wireless access in ultra reliable low latency communication urllc"):
  with members:
    - "how reliable and capable is multi connectivity"
    - "wireless channel dynamics and robustness for ultra reliable low latency communications"
    - "improving network availability of ultra reliable and low latency communications with multi connectivity"
    - "packet duplication in dual connectivity enabled 5g wireless networks overview and challenges"
    - "massive mimo for ultra reliable communications with constellations for dual coherent noncoherent detection"
    - "ultra reliable and low latency wireless communication tail risk and scale"
    - "energy latency tradeoff in ultra reliable low latency communication with retransmissions"
    - "ultra reliable and low latency communications in 5g downlink physical layer aspects"

Connected through hyperedge HE-5 (induced by source paper "performance evaluation and optimization of lpwa iot networks a stochastic geometry approach"):
  with members:
    - "optimized resource provisioning and operation control for low power wide area iot networks"
    - "poisson cluster process bridging the gap between ppp and 3gpp hetnet models"
    - "grant free radio access iot networks scalability analysis in coexistence scenarios"
    - "network lifetime maximization for cellular based m2m networks"
    - "non orthogonal multiple access noma in cellular uplink and downlink challenges and enabling techniques"
    - "e 2 mac energy efficient medium access for massive m2m communications"
    - "2d time frequency interference modelling using stochastic geometry for performance evaluation in low power wide area networks"
    - "interference and outage in clustered wireless ad hoc networks"

Connected through hyperedge HE-6 (induced by source paper "grant free radio access iot networks scalability analysis in coexistence scenarios"):
  with members:
    - "on lorawan scalability empirical evaluation of susceptibility to inter network interference"
    - "lorawan in the wild measurements from the things network"
    - "low power wide area network analysis can lora scale"
    - "e 2 mac energy efficient medium access for massive m2m communications"
    - "understanding the limits of lorawan"
    - "2d time frequency interference modelling using stochastic geometry for performance evaluation in low power wide area networks"
    - "long range communications in unlicensed bands the rising stars in the iot and smart city scenarios"

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)