human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge is induced by one source paper and its member nodes are the cited papers.

Details of the hypergraph:
Center hyperedge (induced by source paper "subcarrier pairing as channel gain tailoring joint resource allocation for relay assisted secure ofdma with untrusted users"):
  Abstract: Joint resource allocation involving optimization of subcarrier allocation, subcarrier pairing (SCP), and power allocation in a cooperative secure orthogonal frequency division multiple access (OFDMA) communication system with untrusted users is considered. Both amplify and forward (AF), and decode and forward (DF) modes of operations are considered with individual power budget constraints for source and relay. After finding optimal subcarrier allocation for an AF relayed system, we prove the joint power allocation as a generalized convex problem, and solve it optimally. Compared to the conventional channel gain matching view, the optimal SCP is emphasized as a novel concept of channel gain tailoring. We prove that the optimal SCP pairs subcarriers such that the variance among the effective channel gains is minimized. For a DF relayed system, we show that depending on the power budgets of source and relay, SCP can either be in a subordinate role where it improves the energy efficiency, or in a main role where it improves the spectral efficiency of the system. In an AF relayed system we confirm that SCP plays a crucial role, and improves the spectral efficiency of the system. The channel gain tailoring property of SCP, various roles of SCP in improving the spectral and the energy efficiency of a cooperative communication system are validated with the help of simulation results.

Includes members:
  Member "jammer assisted resource allocation in secure ofdma with untrusted users":
    also connected through other hyperedges:
      - Hyperedge HE-1 (induced by source paper "ofdma based df secure cooperative communication with untrusted users")
  Member "utility regions for df relay in ofdma based secure communication with untrusted users":
    also connected through other hyperedges:
      (none)
  Member "ofdma based df secure cooperative communication with untrusted users":
    also connected through other hyperedges:
      - Hyperedge HE-2 (induced by source paper "utility regions for df relay in ofdma based secure communication with untrusted users")
  Member "secure communications in noma system subcarrier assignment and power allocation":
    also connected through other hyperedges:
      - Hyperedge HE-3 (induced by source paper "a survey on the security and the evolution of osmotic and catalytic computing for 5g networks")
  Member "principles of physical layer security in multiuser wireless networks a survey":
    also connected through other hyperedges:
      - Hyperedge HE-4 (induced by source paper "angle aware user cooperation for secure massive mimo in rician fading channel")
  Member "on the complexity of joint subcarrier and power allocation for multi user ofdma systems":
    also connected through other hyperedges:
      - Hyperedge HE-5 (induced by source paper "harq cc enabled noma designs with outage probability constraints")
  Member "joint subcarrier pairing and power allocation for ofdm transmission with decode and forward relaying":
    also connected through other hyperedges:
      - Hyperedge HE-6 (induced by source paper "a multiband ofdma heterogeneous network for millimeter wave 5g wireless applications")
  Member "power and subcarrier allocation for physical layer security in ofdma based broadband wireless networks":
    also connected through other hyperedges:
      - Hyperedge HE-7 (induced by source paper "jammer assisted resource allocation in secure ofdma with untrusted users")

Question: Please tell me which class the source paper 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)