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: "relay selection with network coding in two way relay channels"
  Abstract: In this paper, we consider the design of joint network coding (NC) and relay selection (RS) in two-way relay channels. In the proposed schemes, two users first sequentially broadcast their respective information to all the relays. We propose two RS schemes: 1) a single RS with NC and 2) a dual RS with NC. For both schemes, the selected relays perform NC on the received signals sent from the two users and forward them to both users. The proposed schemes are analyzed, and the exact bit-error-rate (BER) expressions are derived and verified through Monte Carlo simulations. It is shown that the dual RS with NC outperforms other considered RS schemes in two-way relay channels. The results also reveal that the proposed RS-NC schemes provide a selection gain compared with an NC scheme with no RS and an NC gain relative to a conventional RS scheme with no NC.

Connected through hyperedge HE-1 (induced by source paper "distributed topology design for network coding deployed large scale sensor networks"):
  with members:
    - "network coding based evolutionary network formation for dynamic wireless networks"
    - "cost efficient qos aware data acquisition point placement for advanced metering infrastructure"
    - "decoding delay minimization in inter session network coding"
    - "distributed rate allocation in inter session network coding"
    - "dynamic network formation with incomplete information"
    - "mac centered cooperation synergistic design of network coding multi packet reception and improved fairness to increase network throughput"
    - "sensor networks with random links topology design for distributed consensus"

Connected through hyperedge HE-2 (induced by source paper "energy efficient resource allocation for hybrid bursty services in multi relay ofdm networks"):
  with members:
    - "spectral and energy spectral efficiency optimization of joint transmit and receive beamforming based multi relay mimo ofdma cellular networks"
    - "achieving maximum energy efficiency in multi relay ofdma cellular networks a fractional programming approach"
    - "physical network coding in two way wireless relay channels"

Connected through hyperedge HE-3 (induced by source paper "energy efficient cooperative network coding with joint relay scheduling and power allocation"):
  with members:
    - "wireless information and power transfer energy efficiency optimization in ofdma systems"
    - "energy efficient precoding for multiple antenna terminals"
    - "distributed power allocation strategies for parallel relay networks"

Connected through hyperedge HE-4 (induced by source paper "performance analysis of relay selection with enhanced dynamic decode and forward and network coding in two way relay channels"):
  with members:
    - "perturbation based distributed beamforming for wireless relay networks"
    - "a simple cooperative diversity method based on network path selection"

Connected through hyperedge HE-5 (induced by source paper "simultaneous bidirectional link selection in full duplex mimo systems"):
  with members:
    - "passive self interference suppression for full duplex infrastructure nodes"
    - "in band full duplex wireless challenges and opportunities"
    - "experiment driven characterization of full duplex wireless systems"
    - "full duplex bidirectional mimo achievable rates under limited dynamic range"

Connected through hyperedge HE-6 (induced by source paper "finite snr analysis of partial relaying with relay selection in channel coded cooperative networks"):
  with members:
    - "wireless network code design and performance analysis using diversity multiplexing tradeoff"
    - "a simple cooperative diversity method based on network path selection"

Connected through hyperedge HE-7 (induced by source paper "performance of opportunistic fixed gain bidirectional relaying with outdated csi"):
  with members:
    - "relay selection for two way relaying with amplify and forward protocols"
    - "a simple cooperative diversity method based on network path selection"

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)