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: "time switching uplink network coded cooperative communication with downlink energy transfer"
  Abstract: In this work, we consider a multiuser cooperative wireless network where the energy-constrained sources have independent information to transmit to a common destination, which is assumed to be externally powered and responsible for transferring energy wirelessly to the sources. The source nodes may cooperate, under either decode-and-forward or network coding-based protocols. Taking into account the fact that the energy harvested by the source nodes is a function of the fading realization of inter-user channels and user-destination channels, we obtain a closed-form approximation for the system outage probability, as well as an approximation for the optimal energy transfer period that minimizes such outage probability. It is also shown that, even though the achievable diversity order is reduced due to wireless energy transfer process, it is very close to t he one achieved for a network without energy constraints. Numerical results are also presented to validate the theoretical resu lts.

Connected through hyperedge HE-1 (induced by source paper "ultra reliable cooperative short packet communications with wireless energy transfer"):
  with members:
    - "ultra reliable short message cooperative relaying protocols under nakagami m fading"
    - "wireless powered communications with finite battery and finite blocklength"
    - "wireless powered relaying with finite block length codes"
    - "analysis of wireless communications with finite blocklength and imperfect channel knowledge"
    - "on wirelessly powered communications with short packets"
    - "wireless powered relays in cooperative communications time switching relaying protocols and throughput analysis"
    - "harvest then cooperate wireless powered cooperative communications"
    - "wireless networks with rf energy harvesting a contemporary survey"

Connected through hyperedge HE-2 (induced by source paper "optimization and analysis of wireless powered multi antenna cooperative systems"):
  with members:
    - "on the performance of multi antenna wireless powered communications with energy beamforming"
    - "relaying strategies for wireless powered mimo relay networks"
    - "wireless powered communication opportunities and challenges"
    - "on the efficiency of far field wireless power transfer"
    - "wireless powered communications performance analysis and optimization"
    - "energy efficient resource allocation for wireless powered communication networks"
    - "optimum wirelessly powered relaying"
    - "spatial throughput maximization of wireless powered communication networks"

Connected through hyperedge HE-3 (induced by source paper "wireless powered communications with finite battery and finite blocklength"):
  with members:
    - "ultra reliable short message relaying with wireless power transfer"
    - "wireless networks with energy harvesting and power transfer joint power and time allocation"
    - "wireless powered two way relaying with power splitting based energy accumulation"
    - "accumulate then forward an opportunistic relaying protocol for wireless powered cooperative communications"
    - "wireless powered relaying with finite block length codes"
    - "blocklength limited performance of relaying under quasi static rayleigh channels"
    - "on wirelessly powered communications with short packets"
    - "towards massive ultra reliable and low latency wireless communication with short packets"

Connected through hyperedge HE-4 (induced by source paper "simultaneous wireless information and power transfer in cooperative relay networks with rateless codes"):
  with members:
    - "optimum transmission policies for energy harvesting sensor networks powered by a mobile control center"
    - "practical non linear energy harvesting model and resource allocation for swipt systems"
    - "enhancing wireless information and power transfer by exploiting multi antenna techniques"
    - "wireless information and energy transfer for two hop non regenerative mimo ofdm relay networks"
    - "outage analysis and optimization for time switching based two way relaying with energy harvesting relay node"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "application of smart antenna technologies in simultaneous wireless information and power transfer"

Connected through hyperedge HE-5 (induced by source paper "efficient coded cooperative networks with energy harvesting and wireless power transfer"):
  with members:
    - "resource allocation in wireless networks with rf energy harvesting and transfer"
    - "throughput maximization for two way relay channels with energy harvesting nodes the impact of relaying strategies"
    - "wireless networks with rf energy harvesting a contemporary survey"
    - "trading wireless information and power transfer relay selection to minimize the outage probability"
    - "throughput maximization in wireless powered communication networks"
    - "throughput optimal policies for energy harvesting wireless transmitters with non ideal circuit power"

Connected through hyperedge HE-6 (induced by source paper "harvest then cooperate wireless powered cooperative communications"):
  with members:
    - "distributed power splitting for swipt in relay interference channels using game theory"
    - "throughput optimization for massive mimo systems powered by wireless energy transfer"
    - "optimal resource allocation in full duplex wireless powered communication network"
    - "full duplex wireless powered communication network with energy causality"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "simultaneous information and energy transfer in large scale networks with without relaying"
    - "throughput maximization in wireless powered communication networks"
    - "cooperative energy harvesting networks with spatially random users"

Connected through hyperedge HE-7 (induced by source paper "outage analysis of cooperative transmission with energy harvesting relay time switching vs power splitting"):
  with members:
    - "wireless information and energy transfer for two hop non regenerative mimo ofdm relay networks"
    - "power allocation strategies in energy harvesting wireless cooperative networks"
    - "a fully distributed opportunistic network coding scheme for cellular relay networks"
    - "cooperative energy harvesting networks with spatially random users"
    - "relaying protocols for wireless energy harvesting and information processing"
    - "wireless information and power transfer architecture design and rate energy tradeoff"

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)