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: "massive m2m access with reliability guarantees in lte systems"
  Abstract: Machine-to-Machine (M2M) communications are one of the major drivers of the cellular network evolution towards 5G systems. One of the key challenges is on how to provide reliability guarantees to each accessing device in a situation in which there is a massive number of almost-simultaneous arrivals from a large set of M2M devices. The existing solutions take a reactive approach in dealing with massive arrivals, such as non-selective barring when a massive arrival event occurs, which implies that the devices cannot get individual reliability guarantees. In this paper we propose a proactive approach, based on a standard operation of the cellular access. The access procedure is divided into two phases, an estimation phase and a serving phase. In the estimation phase the number of arrivals is estimated and this information is used to tune the amount of resources allocated in the serving phase. Our results show that the proactive approach is instrumental in delivering high access reliability to the M2M devices.

Connected through hyperedge HE-1 (induced by source paper "reliable and efficient access for alarm initiated and regular m2m traffic in ieee 802 11ah systems"):
  with members:
    - "reengineering gsm gprs towards a dedicated network for massive smart metering"
    - "reliable reporting for massive m2m communications with periodic resource pooling"
    - "capacity analysis of ieee 802 11ah wlans for m2m communications"

Connected through hyperedge HE-2 (induced by source paper "secure real time monitoring and management of smart distribution grid using shared cellular networks"):
  with members:
    - "assessment of lte wireless access for monitoring of energy distribution in the smart grid"

Connected through hyperedge HE-3 (induced by source paper "massive machine type communication mmtc access with integrated authentication"):
  with members:
    - "massive machine type communications in 5g physical and mac layer solutions"
    - "practical attacks against privacy and availability in 4g lte mobile communication systems"
    - "assessment of lte wireless access for monitoring of energy distribution in the smart grid"
    - "random access for machine type communication based on bloom filtering"

Connected through hyperedge HE-4 (induced by source paper "lte lte a random access for massive machine type communications in smart cities"):
  with members:
    - "probabilistic rateless multiple access for machine to machine communication"
    - "code expanded random access for machine type communications"

Connected through hyperedge HE-5 (induced by source paper "random access for machine type communication based on bloom filtering"):
  with members:
    - "assessment of lte wireless access for monitoring of energy distribution in the smart grid"

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)