Abstract
In this paper, various existing simulation environments for general purpose andspecific purpose WSNs are discussed. The features of number of different sensor network simulators and operating systemsare compared. We have presented an overview of the mostcommonly used operating systems that can be used in different approaches to address the common problems of WSNs . For different simulation environments there are different layer, componentsand protocols implemented so that it is difficult to compare them. When same protocol is simulated usingtwo different simulators still each protocol implementation differs, since their functionality is exactly not the same.Selection of simulator is purely based on the application, since each simulator has a varied range of performance depending on application.
Highlights
1.1 Wireless Sensor NetworksWireless Sensor Network [1][2][3][4] is a collection of tiny nodes
Operating systems used for sensor networks is same as traditional embedded system such as eCos or uC/OS often designed with real-time properties
The tiny sensor nodes in the sensor networks executes event-centric, concurrent, reactive program that operates with severe memory and power constraints
Summary
Wireless Sensor Network [1][2][3][4] is a collection of tiny nodes. Each node comprises of processing units (one or more microcontrollers, CPUs or DSP chips), memories (program, data and flash memories), RF transceiver (usually with a single omni- directional antenna), power source (e.g., batteries and solar cells) and various types of sensors and actuators. These tiny sensor nodes are deployed in spatially distributed terrain. The nodes sense the environment and communicate the information gathered from the monitoring field (e.g., an area) through wireless links.
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