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: "energy efficient mac protocols in wireless body area sensor networks a survey"
  Abstract: In this paper, we first presented an analytically discussion about energy efficiency of Medium Access Control (MAC) protocols for Wireless Body Area Sensor Networks (WBASNs). For this purpose, different energy efficient MAC protocols with their respective energy optimization techniques; Low Power Listening (LPL), Scheduled Contention and Time Division Multiple Access (TDMA), are elaborated. We also analytically compared path loss models for In-body, On-body and Off-body communications in WBASNs. These three path loss scenarios are simulated in MATLAB and results shown that path loss is more in In-body communication because of less energy level to take care of tissues and organs located inside human body. Secondly, power model for WBASNs of Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) and beacon mode is also presented. MATLAB simulations results shown that power of CSMA/CA mode is less as compared to beacon mode. Finally, we suggested that hybrid mode is more useful to achieve optimization in power consumption, which consequently results in high energy efficiency.

Connected through hyperedge HE-1 (induced by source paper "an energy efficient decoding scheme for wireless body area sensor networks"):
  with members:
    - "heer hybrid energy efficient reactive protocol for wireless sensor networks"
    - "e horm an energy efficient hole removing mechanism in wireless sensor networks"
    - "divide and rule scheme for energy efficient routing in wireless sensor networks"
    - "density controlled divide and rule scheme for energy efficient routing in wireless sensor networks"
    - "towards lp modeling for maximizing throughput and minimizing routing delay in proactive protocols in wireless multi hop networks"
    - "srp ms a new routing protocol for delay tolerant wireless sensor networks"
    - "aid an energy efficient decoding scheme for ldpc codes in wireless body area sensor networks"
    - "on adaptive energy efficient transmission in wsns"

Connected through hyperedge HE-2 (induced by source paper "distance aware relaying energy efficient dare to monitor patients in multi hop body area sensor networks"):
  with members:
    - "eddeec enhanced developed distributed energy efficient clustering for heterogeneous wireless sensor networks"
    - "ubiquitous healthcare in wireless body area networks a survey"
    - "on modeling geometric joint sink mobility with delay tolerant cluster less wireless sensor networks"
    - "analyzing delay in wireless multi hop heterogeneous body area networks"
    - "srp ms a new routing protocol for delay tolerant wireless sensor networks"
    - "adaptive reliable medium access control protocol for wireless body area networks"
    - "analysis and modeling experiment performance parameters of routing protocols in manets and vanets"
    - "analytical survey of wearable sensors"

Connected through hyperedge HE-3 (induced by source paper "imod leach improved modified leach protocol for wireless sensor networks"):
  with members:
    - "ach away cluster heads scheme for energy efficient clustering protocols in wsns"
    - "advanced leach a static clustering based heteroneous routing protocol for wsns"
    - "modleach a variant of leach for wsns"
    - "heer hybrid energy efficient reactive protocol for wireless sensor networks"
    - "east energy efficient adaptive scheme for transmission in wireless sensor networks"
    - "e horm an energy efficient hole removing mechanism in wireless sensor networks"
    - "density controlled divide and rule scheme for energy efficient routing in wireless sensor networks"
    - "towards lp modeling for maximizing throughput and minimizing routing delay in proactive protocols in wireless multi hop networks"

Connected through hyperedge HE-4 (induced by source paper "measuring fatigue of soldiers in wireless body area sensor networks"):
  with members:
    - "eddeec enhanced developed distributed energy efficient clustering for heterogeneous wireless sensor networks"
    - "hybrid deec towards efficient energy utilization in wireless sensor networks"
    - "q leach a new routing protocol for wsns"
    - "heer hybrid energy efficient reactive protocol for wireless sensor networks"
    - "density controlled divide and rule scheme for energy efficient routing in wireless sensor networks"
    - "adaptive reliable medium access control protocol for wireless body area networks"
    - "energy efficient sleep awake aware eesaa intelligent sensor network routing protocol"
    - "ubiquitous healthcare in wireless body area networks"

Connected through hyperedge HE-5 (induced by source paper "the fame threshold based energy efficient fatigue measurement for wireless body area sensor networks using multiple sinks"):
  with members:
    - "performance study of localization techniques in wireless body area sensor networks"
    - "noise filtering channel modeling and energy utilization in wireless body area networks"
    - "adaptive reliable medium access control protocol for wireless body area networks"
    - "m attempt a new energy efficient routing protocol in wireless body area sensor networks"
    - "modeling propagation characteristics for arm motion in wireless body area sensor networks"
    - "on using multiple quality link metrics with destination sequenced distance vector protocol for wireless multi hop networks"
    - "identifying design requirements for wireless routing link metrics"
    - "interference and bandwidth adjusted etx in wireless multi hop networks"

Connected through hyperedge HE-6 (induced by source paper "aid an energy efficient decoding scheme for ldpc codes in wireless body area sensor networks"):
  with members:
    - "e horm an energy efficient hole removing mechanism in wireless sensor networks"
    - "divide and rule scheme for energy efficient routing in wireless sensor networks"
    - "density controlled divide and rule scheme for energy efficient routing in wireless sensor networks"
    - "performance study of localization techniques in wireless body area sensor networks"
    - "adaptive reliable medium access control protocol for wireless body area networks"
    - "modeling and evaluating enhancements in expanding ring search algorithm for wireless reactive protocols"
    - "energy efficiency and reliability in wireless biomedical implant systems"
    - "towards a communication theoretic understanding of system level power consumption"

Connected through hyperedge HE-7 (induced by source paper "non invasive induction link model for implantable biomedical microsystems pacemaker to monitor arrhythmic patients in body area networks"):
  with members:
    - "on modeling geometric joint sink mobility with delay tolerant cluster less wireless sensor networks"
    - "srp ms a new routing protocol for delay tolerant wireless sensor networks"
    - "on adaptive energy efficient transmission in wsns"
    - "adaptive reliable medium access control protocol for wireless body area networks"
    - "analysis and modeling experiment performance parameters of routing protocols in manets and vanets"
    - "a comprehensive survey of mac protocols for wireless body area networks"
    - "modeling propagation characteristics for arm motion in wireless body area sensor 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.NI(Networking and Internet Architecture)