Sos And Nano Rk A Comparative Study
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  • 1.  
  • 2.  
  • 3.
    • OS for mote-class WSN.
    • Developed by the Networked and Embedded Systems Lab (NESL) at UCLA.
    • Dynamic reconfigurability- main motivation behind SOS.
    • Completely written in C Programming language.
  • 4. Static SOS kernel Sensor Manager Messaging I/O System Timer SOS Services Tree Routing Module Data Collector Application Photo-sensor Module Dynamically Loaded modules Dynamic Memory Message Scheduler Dynamic Linker Kernel Components
  • 5.
    • Dynamic operating system.
    • Compact kernel interface.
    • Safety features through run-time checks
    • Performance
  • 6.  
  • 7.
    • Fully preemptive reservation-based RTOS.
    • Developed by Carnegie Mellon University .
    • Multi-hop networking support.
    • Supports fixed-priority preemptive multitasking.
    • Currently runs on the FireFly and MicaZ motes.
  • 8.  
  • 9. FEATURES OF NANO-RK
    • Multitasking
    • Timeliness and Schedulability
    • Enforcement of Resource Usage Limits
    • Classical OS Multitasking
    • Small footprint
      • <18 KB ROM
      • <2 KB RAM
  • 10.  
  • 11.  
  • 12.  
  • 13.  
  • 14.
      • Preemptive scheduling
      • Task synchronization
      • deadlock prevention
  • 15.