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: "qos provisioning for multimedia transmission in cognitive radio networks"
  Abstract: Abstract - In cognitive radio (CR) networks, the perceived reduction of application layer quality of ser-vice (QoS), such as multimediadistortion, by secondary users may impede the success of CR technologies.Most previous work in CR networks ignores application layer QoS. In this paper we take an integrated de-sign approach to jointly optimize multimedia intra refreshing rate, an application layer parameter, togetherwith access strategy, and spectrum sensing for multimedia transmission in a CR system with time varyingwireless channels. Primary network usage and channel gain are modeled as a ﬁnite state Markov process.With channel sensing and channel state information errors, the system state cannot be directly observed.We formulate the QoS optimization problem as a partially observable Markov decision process (POMDP).A low complexity dynamic programming framework is presented to obtain the optimal policy. Simulationresults show the effectiveness of the proposed scheme.Keywords - Cognitive radio networks, multimedia, 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)