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: "a new noma approach for fair power allocation"
  Abstract: A non-orthogonal multiple access (NOMA) approach to user signal power allocation called Fair-NOMA is introduced. Fair-NOMA is the application of NOMA in such a way that two mobile users have the opportunity to always achieve at least the information capacity they can achieve by using orthogonal multiple access (OMA), regardless of the user selection criteria, making it suitable for implementation using any current or future scheduling paradigms. Given this condition, the bounds of the power allocation coefficients are derived as functions of the channel gains of the two mobile users. The NOMA power allocation is analyzed for two scheduled users that are selected randomly with i.i.d. channel gains. The capacity improvements made by each user and the sum capacity improvement are derived.

Connected through hyperedge HE-1 (induced by source paper "fundamentals of power allocation strategies for downlink multi user noma with target rates"):
  with members:
    - "leveraging edge caching in noma systems with qos requirements"
    - "on the power allocation limits for downlink multi user noma with qos"
    - "joint beamforming and power allocation in downlink noma multiuser mimo networks"
    - "a fair power allocation approach to noma in multiuser siso systems"
    - "joint power allocation and beamforming for non orthogonal multiple access noma in 5g millimeter wave communications"
    - "on optimal power allocation for downlink non orthogonal multiple access systems"
    - "a fair individual rate comparison between mimo noma and mimo oma"
    - "capacity comparison between mimo noma and mimo oma with multiple users in a cluster"

Connected through hyperedge HE-2 (induced by source paper "weighted sum rate maximization in multi carrier noma with cellular power constraint"):
  with members:
    - "optimal joint subcarrier and power allocation in noma is strongly np hard"
    - "optimal joint power and subcarrier allocation for mc noma systems"
    - "power and channel allocation for non orthogonal multiple access in 5g systems tractability and computation"
    - "complexity analysis of joint subcarrier and power allocation for the cellular downlink ofdma system"
    - "on the complexity of joint subcarrier and power allocation for multi user ofdma systems"

Connected through hyperedge HE-3 (induced by source paper "optimum fairness for non orthogonal multiple access"):
  with members:
    - "when mmwave communications meet network densification a scalable interference coordination perspective"
    - "a two phase power allocation scheme for crns employing noma"
    - "fairness for non orthogonal multiple access in 5g systems"

Connected through hyperedge HE-4 (induced by source paper "leveraging edge caching in noma systems with qos requirements"):
  with members:
    - "a fair power allocation approach to noma in multiuser siso systems"
    - "caching at the edge a green perspective for 5g networks"
    - "living on the edge the role of proactive caching in 5g wireless networks"

Connected through hyperedge HE-5 (induced by source paper "on the power allocation limits for downlink multi user noma with qos"):
  with members:
    - "downlink non orthogonal multiple access with limited feedback"
    - "a fair power allocation approach to noma in multiuser siso systems"
    - "on the performance of non orthogonal multiple access in 5g systems with randomly deployed users"

Connected through hyperedge HE-6 (induced by source paper "downlink non orthogonal multiple access with limited feedback"):
  with members:
    - "an optimization perspective of the superiority of noma compared to conventional oma"
    - "design of massive mimo noma with limited feedback"
    - "a minorization maximization method for optimizing sum rate in the downlink of non orthogonal multiple access systems"
    - "dynamic user clustering and power allocation for uplink and downlink non orthogonal multiple access noma systems"
    - "joint downlink base station association and power control for max min fairness computation and complexity"
    - "fairness for non orthogonal multiple access in 5g systems"
    - "a general mimo framework for noma downlink and uplink transmission based on signal alignment"
    - "on the performance of non orthogonal multiple access in 5g systems with randomly deployed users"

Connected through hyperedge HE-7 (induced by source paper "a fair power allocation approach to noma in multiuser siso systems"):
  with members:
    - "the application of mimo to non orthogonal multiple access"
    - "fairness for non orthogonal multiple access in 5g systems"
    - "uplink non orthogonal multiple access for 5g 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)