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: "transmission strategies in multiple access fading channels with statistical qos constraints"
  Abstract: Effective capacity, which provides the maximum constant arrival rate that a given service process can support while satisfying statistical delay constraints, is analyzed in a multiuser scenario. In particular, the effective capacity region of fading multiple access channels (MAC) in the presence of quality of service (QoS) constraints is studied. Perfect channel side information (CSI) is assumed to be available at both the transmitters and the receiver. It is initially assumed the transmitters send the information at a fixed power level and hence do not employ power control policies. Under this assumption, the performance achieved by superposition coding with successive decoding techniques is investigated. It is shown that varying the decoding order with respect to the channel states can significantly increase the achievable throughput region. In the two-user case, the optimal decoding strategy is determined for the scenario in which the users have the same QoS constraints. The performance of orthogonal transmission strategies is also analyzed. It is shown that for certain QoS constraints, time-division multiple-access (TDMA) can achieve better performance than superposition coding if fixed successive decoding order is used at the receiver side. #R##N#In the subsequent analysis, power control policies are incorporated into the transmission strategies. The optimal power allocation policies for any fixed decoding order over all channel states are identified. For a given variable decoding order strategy, the conditions that the optimal power control policies must satisfy are determined, and an algorithm that can be used to compute these optimal policies is provided.

Connected through hyperedge HE-1 (induced by source paper "downlink analysis of noma enabled cellular networks with 3gpp inspired user ranking"):
  with members:
    - "downlink analysis for the typical cell in poisson cellular networks"
    - "noma in the uplink delay analysis with imperfect csi and finite length coding"
    - "meta distribution of downlink non orthogonal multiple access noma in poisson networks"
    - "downlink non orthogonal multiple access noma in poisson networks"
    - "stochastic geometry based uplink analysis of massive mimo systems with fractional pilot reuse"
    - "accuracy of distance based ranking of users in the analysis of noma systems"
    - "non orthogonal multiple access in large scale heterogeneous networks"
    - "a survey on non orthogonal multiple access for 5g networks research challenges and future trends"

Connected through hyperedge HE-2 (induced by source paper "noma in the uplink delay analysis with imperfect csi and finite length coding"):
  with members:
    - "delay performance of the multiuser miso downlink under imperfect csi and finite length coding"
    - "delay performance of wireless communications with imperfect csi and finite length coding"
    - "on the delay performance of interference channels"
    - "fairness for non orthogonal multiple access in 5g systems"
    - "the dispersion of nearest neighbor decoding for additive non gaussian channels"
    - "on the performance of non orthogonal multiple access in 5g systems with randomly deployed users"
    - "quasi static multiple antenna fading channels at finite blocklength"
    - "multiuser mimo achievable rates with downlink training and channel state feedback"

Connected through hyperedge HE-3 (induced by source paper "effective capacity of buffer aided full duplex relay systems with selection relaying"):
  with members:
    - "delay constrained video transmission quality driven resource allocation and scheduling"
    - "buffer aided relaying with adaptive link selection fixed and mixed rate transmission"
    - "qos aware base station selections for distributed mimo links in broadband wireless networks"
    - "effective capacity of two hop wireless communication systems"

Connected through hyperedge HE-4 (induced by source paper "effective capacity in multiple access channels with arbitrary inputs"):
  with members:
    - "on the throughput and energy efficiency of cognitive mimo transmissions"
    - "mimo wireless communications under statistical queueing constraints"
    - "mutual information and minimum mean square error in gaussian channels"

Connected through hyperedge HE-5 (induced by source paper "wireless throughput and energy efficiency with random arrivals and statistical queueing constraints"):
  with members:
    - "green cellular networks a survey some research issues and challenges"
    - "mimo wireless communications under statistical queueing constraints"
    - "effective capacity analysis of cognitive radio channels for quality of service provisioning"

Connected through hyperedge HE-6 (induced by source paper "statistical delay tradeoffs in buffer aided two hop wireless communication systems"):
  with members:
    - "delay constrained video transmission quality driven resource allocation and scheduling"
    - "buffer aided relaying with adaptive link selection fixed and mixed rate transmission"
    - "effective capacity of two hop wireless communication systems"
    - "statistical delay control and qos driven power allocation over two hop wireless relay links"

Connected through hyperedge HE-7 (induced by source paper "cross layer optimization of two way relaying for statistical qos guarantees"):
  with members:
    - "joint source and relay precoding designs for mimo two way relaying based on mse criterion"
    - "pairwise check decoding for ldpc coded two way relay block fading channels"
    - "queue aware distributive resource control for delay sensitive two hop mimo cooperative systems"
    - "optimization framework and graph based approach for relay assisted bidirectional ofdma cellular networks"
    - "channel coding and decoding in a relay system operated with physical layer network coding"
    - "physical network coding in two way wireless relay channels"
    - "physical layer network coding"

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)