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: "noma based random access with multichannel aloha"
  Abstract: In nonorthogonal multiple access (NOMA), the power difference of multiple signals is exploited for multiple access and successive interference cancellation (SIC) is employed at a receiver to mitigate co-channel interference. Thus, NOMA is usually employed for coordinated transmissions and mostly applied to downlink transmissions where a base station (BS) per- forms coordination for downlink transmissions with full channel state information (CSI). In this paper, however, we show that NOMA can also be employed for non-coordinated transmissions such as random access for uplink transmissions. We apply a NOMA scheme to multichannel ALOHA and show that the throughput can be improved. In particular, the resulting scheme is suitable for random access when the number of subchannels is limited since NOMA can effectively increase the number of subchannels without any bandwidth expansion.

Connected through hyperedge HE-1 (induced by source paper "constrained deep reinforcement learning for energy sustainable multi uav based random access iot networks with noma"):
  with members:
    - "optimizing non orthogonal multiple access in random access networks"
    - "deep reinforcement learning for minimizing age of information in uav assisted networks"
    - "a game theoretic approach for noma aloha"
    - "reward constrained policy optimization"
    - "optimal 3d trajectory design and resource allocation for solar powered uav communication systems"
    - "risk sensitive reinforcement learning a constrained optimization viewpoint"
    - "addressing function approximation error in actor critic methods"
    - "accelerated primal dual policy optimization for safe reinforcement learning"

Connected through hyperedge HE-2 (induced by source paper "random noma with cross slot successive interference cancellation packet recovery"):
  with members:
    - "maximum sum rate of slotted aloha with successive interference cancellation"
    - "irregular repetition slotted aloha over the rayleigh block fading channel with capture"
    - "maximum sum rate of slotted aloha with capture"
    - "coded slotted aloha a graph based method for uncoordinated multiple access"
    - "aloha random access that operates as a rateless code"

Connected through hyperedge HE-3 (induced by source paper "optimizing non orthogonal multiple access in random access networks"):
  with members:
    - "a survey of rate optimal power domain noma schemes for enabling technologies of future wireless networks"
    - "a game theoretic approach for noma aloha"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"
    - "massive machine type communications in 5g physical and mac layer solutions"

Connected through hyperedge HE-4 (induced by source paper "multichannel aloha with exploration phase"):
  with members:
    - "layered non orthogonal random access with sic and transmit diversity for reliable transmissions"
    - "massive machine type communications in 5g physical and mac layer solutions"
    - "coded random access applying codes on graphs to design random access protocols"
    - "asynchronous code division random access using convex optimization"

Connected through hyperedge HE-5 (induced by source paper "evolutionary game for hybrid uplink noma with truncated channel inversion power control"):
  with members:
    - "on the performance of network noma in uplink comp systems a stochastic geometry approach"
    - "layered non orthogonal random access with sic and transmit diversity for reliable transmissions"
    - "joint power allocation and beamforming for non orthogonal multiple access noma in 5g millimeter wave communications"
    - "noma principles and recent results"
    - "fairness for non orthogonal multiple access in 5g systems"

Connected through hyperedge HE-6 (induced by source paper "simple semi grant free transmission strategies assisted by non orthogonal multiple access"):
  with members:
    - "short packet downlink transmission with non orthogonal multiple access"
    - "massive connectivity with massive mimo part ii achievable rate characterization"
    - "massive connectivity with massive mimo part i device activity detection and channel estimation"
    - "ultra reliable low latency cellular networks use cases challenges and approaches"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"
    - "optimal joint power and subcarrier allocation for full duplex multicarrier non orthogonal multiple access systems"
    - "dynamic user clustering and power allocation for uplink and downlink non orthogonal multiple access noma systems"
    - "uplink non orthogonal multiple access for 5g wireless networks"

Connected through hyperedge HE-7 (induced by source paper "noma based compressive random access using gaussian spreading"):
  with members:
    - "sparse signal processing for grant free massive connectivity a future paradigm for random access protocols in the internet of things"
    - "performance of hierarchical sparse detectors for massive mtc"
    - "massive connectivity with massive mimo part i device activity detection and channel estimation"
    - "a variational inference based detection method for repetition coded generalized spatial modulation"
    - "layered non orthogonal random access with sic and transmit diversity for reliable transmissions"
    - "massive machine type communications in 5g physical and mac layer solutions"
    - "on the performance of non orthogonal multiple access in 5g systems with randomly deployed users"
    - "asynchronous code division random access using convex optimization"

Connected through hyperedge HE-8 (induced by source paper "maximum sum rate of slotted aloha with successive interference cancellation"):
  with members:
    - "maximum sum rate of slotted aloha with capture"
    - "coded random access applying codes on graphs to design random access protocols"
    - "aloha random access that operates as a rateless code"
    - "random access an information theoretic perspective"
    - "random access with physical layer network coding"
    - "an overview of the transmission capacity of wireless 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.IT(Information Theory)