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: "optimal utilization of a cognitive shared channel with a rechargeable primary source node"
  Abstract: This paper considers the scenario in which a set of nodes share a common channel. Some nodes have a rechargeable battery and the others are plugged to a reliable power supply and, thus, have no energy limitations. We consider two source-destination pairs and apply the concept of cognitive radio communication in sharing the common channel. Specifically, we give high-priority to the energy-constrained source-destination pair, i.e., primary pair, and low-priority to the pair which is free from such constraint, i.e., secondary pair. In contrast to the traditional notion of cognitive radio, in which the secondary transmitter is required to relinquish the channel as soon as the primary is detected, the secondary transmitter not only utilizes the idle slots of primary pair but also transmits along with the primary transmitter with probability $p$. This is possible because we consider the general multi-packet reception model. Given the requirement on the primary pair's throughput, the probability $p$ is chosen to maximize the secondary pair's throughput. To this end, we obtain two-dimensional maximum stable throughput region which describes the theoretical limit on rates that we can push into the network while maintaining the queues in the network to be stable. The result is obtained for both cases in which the capacity of the battery at the primary node is infinite and also finite.

Connected through hyperedge HE-1 (induced by source paper "wireless network level partial relay cooperation a stable throughput analysis"):
  with members:
    - "relay selection in cooperative power line communication a multi armed bandit approach"
    - "wireless energy harvesting in a cognitive relay network"
    - "energy aware wireless relay selection in load coupled ofdma cellular networks"
    - "probabilistic cooperation of a full duplex relay in random access networks"
    - "on the stability of random multiple access with stochastic energy harvesting"
    - "effect of energy harvesting on stable throughput in cooperative relay systems"
    - "relay assisted multiple access with full duplex multi packet reception"
    - "5g cellular key enabling technologies and research challenges"

Connected through hyperedge HE-2 (induced by source paper "stable throughput of cooperative cognitive networks with energy harvesting finite relay buffer and finite battery capacity"):
  with members:
    - "optimization of energy constrained wireless powered communication networks with heterogeneous nodes"
    - "non orthogonal multiple access schemes in wireless powered communication networks"
    - "on stable throughput of cognitive radio networks with cooperating secondary users"
    - "on optimal policies in full duplex wireless powered communication networks"
    - "energy harvesting wireless communications a review of recent advances"
    - "effect of energy harvesting on stable throughput in cooperative relay systems"
    - "energy efficient resource allocation for wireless powered communication networks"
    - "cooperative access in cognitive radio networks stable throughput and delay tradeoffs"

Connected through hyperedge HE-3 (induced by source paper "online time sharing policy in energy harvesting cognitive radio network with channel uncertainty"):
  with members:
    - "end to end throughput maximization for underlay multi hop cognitive radio networks with rf energy harvesting"
    - "on optimal offline time sharing policy for energy harvesting underlay cognitive radio"
    - "optimal time sharing in underlay cognitive radio systems with rf energy harvesting"
    - "outage analysis of spectrum sharing energy harvesting cognitive relays in nakagami m channels"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "on green energy powered cognitive radio networks"
    - "a learning theoretic approach to energy harvesting communication system optimization"

Connected through hyperedge HE-4 (induced by source paper "stability analysis of tdd networks revisited a trade off between complexity and precision"):
  with members:
    - "effect of energy harvesting on stable throughput in cooperative relay systems"
    - "the stability region of the two user interference channel"
    - "asymptotic stability region of slotted aloha"

Connected through hyperedge HE-5 (induced by source paper "on the performance of delay aware shared access with priorities"):
  with members:
    - "joint scheduling and power control for delay guarantees in heterogeneous cognitive radios"
    - "throughput optimization in multichannel cognitive radios with hard deadline constraints"
    - "relay assisted multiple access with full duplex multi packet reception"
    - "throughput of a cognitive radio network under congestion constraints a network level study"
    - "what will 5g be"
    - "low rate machine type communication via wireless device to device d2d links"
    - "power control for d2d underlaid cellular networks modeling algorithms and analysis"
    - "stable throughput in a cognitive wireless network"

Connected through hyperedge HE-6 (induced by source paper "on energy cooperation in energy harvesting underlay cognitive radio network"):
  with members:
    - "optimal time sharing in underlay cognitive radio systems with rf energy harvesting"
    - "on information and energy cooperation in energy harvesting cognitive radio"
    - "information and energy cooperation in cognitive radio networks"
    - "energy harvesting cognitive radio with channel aware sensing strategy"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "on green energy powered cognitive radio networks"
    - "cognitive energy harvesting and transmission from a network perspective"
    - "optimal random access and random spectrum sensing for an energy harvesting cognitive radio"

Connected through hyperedge HE-7 (induced by source paper "outage minimization for a fading wireless link with energy harvesting transmitter and receiver"):
  with members:
    - "spatial throughput of mobile ad hoc networks powered by energy harvesting"
    - "energy cooperation in energy harvesting communications"
    - "throughput maximization for the gaussian relay channel with energy harvesting constraints"
    - "optimal power allocation for energy harvesting and power grid coexisting wireless communication systems"
    - "throughput optimal policies for energy harvesting wireless transmitters with non ideal circuit power"
    - "optimal save then transmit protocol for energy harvesting wireless transmitters"
    - "two hop communication with energy harvesting"
    - "optimal energy allocation for wireless communications with energy harvesting constraints"

Connected through hyperedge HE-8 (induced by source paper "on the stability of random multiple access with stochastic energy harvesting"):
  with members:
    - "medium access control protocols for wireless sensor networks with energy harvesting"
    - "neighbor discovery in a wireless sensor network multipacket reception capability and physical layer signal processing"
    - "information theoretic analysis of an energy harvesting communication system"
    - "efficient energy management policies for networks with energy harvesting sensor nodes"
    - "asymptotic stability region of slotted aloha"

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)