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: "enhanced contention resolution aloha ecra"
  Abstract: Random Access (RA) Medium Access (MAC) protocols are simple and effective when the nature of the traffic is unpredictable and random. In the following paper, a novel RA protocol called Enhanced Contention Resolution ALOHA (ECRA) is presented. This evolution, based on the previous Contention Resolution ALOHA (CRA) protocol, exploits the nature of the interference in unslotted Aloha-like channels for trying to resolve most of the partial collision that can occur there. In the paper, the idea behind ECRA is presented together with numerical simulations and a mathematical analysis of its performance gain. It is shown that relevant performance increases in both throughput and Packet Error Rate (PER) can be reached by ECRA with respect to CRA. A comparison with Contention Resolution Diversity Slotted ALOHA (CRDSA) is also provided.

Connected through hyperedge HE-1 (induced by source paper "enhancing contention resolution aloha using combining techniques"):
  with members:
    - "error floor analysis of coded slotted aloha over packet erasure channels"
    - "all to all broadcast for vehicular networks based on coded slotted aloha"
    - "coded slotted aloha a graph based method for uncoordinated multiple access"
    - "cooperative slotted aloha for multi base station systems"
    - "the throughput of slotted aloha with diversity"
    - "aloha random access that operates as a rateless code"
    - "optimum header positioning in successive interference cancellation sic based aloha"
    - "sliding window based contention resolution diversity slotted aloha"

Connected through hyperedge HE-2 (induced by source paper "detection and combining techniques for asynchronous random access with time diversity"):
  with members:
    - "enhancing contention resolution aloha using combining techniques"
    - "all to all broadcast for vehicular networks based on coded slotted aloha"
    - "cooperative slotted aloha for multi base station systems"
    - "aloha random access that operates as a rateless code"
    - "optimum header positioning in successive interference cancellation sic based aloha"
    - "frameless aloha protocol for wireless networks"

Connected through hyperedge HE-3 (induced by source paper "interference calculation in asynchronous random access protocols using diversity"):
  with members:
    - "random access in dvb rcs2 design and dynamic control for congestion avoidance"
    - "average power limitations in sliding window contention resolution diversity slotted aloha"
    - "on the stability of asynchronous random access schemes"
    - "crdsa crdsa and irsa stability and performance evaluation"

Connected through hyperedge HE-4 (induced by source paper "cooperative slotted aloha for multi base station systems"):
  with members:
    - "coded slotted aloha a graph based method for uncoordinated multiple access"
    - "slotted aloha for networked base stations with spatial and temporal diversity"
    - "slotted aloha for networked base stations"
    - "coded random access how coding theory helps to build random access protocols"
    - "exploiting capture effect in frameless aloha for massive wireless random access"
    - "characterization of coded random access with compressive sensing based multi user detection"
    - "the throughput of slotted aloha with diversity"
    - "aloha random access that operates as a rateless code"

Connected through hyperedge HE-5 (induced by source paper "on the stability of asynchronous random access schemes"):
  with members:
    - "crdsa crdsa and irsa stability and performance evaluation"
    - "on the stability of contention resolution diversity slotted aloha crdsa"

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)