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: "coded random access applying codes on graphs to design random access protocols"
  Abstract: The rise of machine-to-machine communications has rekindled interest in random access protocols as a support for a massive number of uncoordinatedly transmitting devices. The legacy ALOHA approach is developed under a collision model, where slots containing collided packets are considered as waste. However, if the common receiver (e.g. base station) is able to store the collision slots and use them in a transmission recovery process based on successive interference cancellation, the design space for access protocols is radically expanded. We present the paradigm of coded random access, in which the structure of the access protocol can be mapped to a structure of an erasure-correcting code defined on a graph. This opens the possibility to use coding theory and tools for designing efficient random access protocols, offering markedly better performance than ALOHA. Several instances of coded random access protocols are described, as well as a case study on how to upgrade a legacy ALOHA system using the ideas of coded random access.

Connected through hyperedge HE-1 (induced by source paper "massive unsourced random access based on uncoupled compressive sensing another blessing of massive mimo"):
  with members:
    - "a joint graph based coding scheme for the unsourced random access gaussian channel"
    - "polar coding and random spreading for unsourced multiple access"
    - "massive mimo unsourced random access"
    - "generalized approximate message passing for massive mimo mmwave channel estimation with laplacian prior"
    - "an enhanced decoding algorithm for coded compressed sensing"
    - "sparcs for unsourced random access"
    - "improved scaling law for activity detection in massive mimo systems"
    - "a coupled compressive sensing scheme for unsourced multiple access"

Connected through hyperedge HE-2 (induced by source paper "polar slotted aloha over slot erasure channels"):
  with members:
    - "faulty successive cancellation decoding of polar codes for the binary erasure channel"
    - "error floor analysis of coded slotted aloha over packet erasure channels"
    - "llr based successive cancellation list decoding of polar codes"
    - "coded slotted aloha a graph based method for uncoordinated multiple access"
    - "list decoding of polar codes"

Connected through hyperedge HE-3 (induced by source paper "multichannel aloha with exploration phase"):
  with members:
    - "layered non orthogonal random access with sic and transmit diversity for reliable transmissions"
    - "noma based random access with multichannel aloha"
    - "massive machine type communications in 5g physical and mac layer solutions"
    - "asynchronous code division random access using convex optimization"

Connected through hyperedge HE-4 (induced by source paper "random access for massive machine type communications"):
  with members:
    - "beamwidth control for noma in hybrid mmwave communication systems"
    - "design of non orthogonal beamspace multiple access for cellular internet of things"
    - "on the performance gain of noma over oma in uplink single cell systems"
    - "multi beam noma for hybrid mmwave systems"
    - "joint pilot and payload power control for uplink mimo noma with mrc sic receivers"
    - "reliability based windowed decoding for spatially coupled ldpc codes"
    - "short packet downlink transmission with non orthogonal multiple access"
    - "a multi beam noma framework for hybrid mmwave systems"

Connected through hyperedge HE-5 (induced by source paper "massive access for future wireless communication systems"):
  with members:
    - "fundamental limits of many user mac with finite payloads and fading"
    - "non bayesian activity detection large scale fading coefficient estimation and unsourced random access with a massive mimo receiver"
    - "on the fundamental limits of mimo massive access communication"
    - "a joint graph based coding scheme for the unsourced random access gaussian channel"
    - "polar coding and random spreading for unsourced multiple access"
    - "energy efficient coded random access for the wireless uplink"
    - "sparcs for unsourced random access"
    - "random access channel coding in the finite blocklength regime"

Connected through hyperedge HE-6 (induced by source paper "reliability latency performance of frameless aloha with and without feedback"):
  with members:
    - "finite length analysis of irregular repetition slotted aloha in the waterfall region"
    - "on the modeling and performance assessment of random access with sic"
    - "optimized frameless aloha for cooperative base stations with overlapped coverage areas"
    - "frameless aloha with reliability latency guarantees"
    - "inactivation decoding of lt and raptor codes analysis and code design"
    - "finite length analysis of frameless aloha"
    - "on frame asynchronous coded slotted aloha asymptotic finite length and delay analysis"
    - "error floor analysis of coded slotted aloha over packet erasure channels"

Connected through hyperedge HE-7 (induced by source paper "two layer coded channel access with collision resolution design and analysis"):
  with members:
    - "probabilistic rateless multiple access for machine to machine communication"
    - "scma for downlink multiple access of 5g wireless networks"
    - "near capacity adaptive analog fountain codes for wireless channels"
    - "aloha random access that operates as a rateless code"
    - "graph based random access for the collision channel without feedback capacity bound"
    - "high throughput random access via codes on graphs coded slotted aloha"

Connected through hyperedge HE-8 (induced by source paper "six key enablers for machine type communication in 6g"):
  with members:
    - "6g the next frontier"
    - "fast uplink grant for machine type communications challenges and opportunities"
    - "massive machine type communication mmtc access with integrated authentication"
    - "energy harvesting wireless communications a review of recent advances"

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)