基於J-Sim模擬器之IEEE 802.15.4無線感測器網路模組之研製

Abstract

In order to enable the design and development of new wireless sensor network (WSN) protocols and applications, it is necessary to monitor and evaluate the operation of WSN. However, nodes deployment, system maintenance, and data collection tasks of real WSNs are labor-intensive, error-prone and cost-inefficient. Evaluating WSN in simulation is an effective and feasible solution under constrains of hard to actually implement and cost consideration. IEEE 802.15.4 is an international standard which specifies the physical (PHY) and medium access control (MAC) layer for low-rate wireless personal area networks (LR-WPANs) which focuses on short-range, low-data-rate and low-power. It is the basis for the ZigBee specification and generally used in various WSN platforms. J-Sim is a Java-developed network simulation framework with high generality, scalability and extensibility. Additionally, J-Sim supports WSN framework, but lacks the WSN protocol module to improve the reliability of simulation results. In this thesis, an IEEE 802.15.4 protocol module in J-Sim is designed, developed and implemented. This module has completed the functions of beacon mode and nonbeacon mode transmissions, and personal area network management. Finally, a large scale WSN scenario based on the proposed module is built on J-Sim to verify the scalability of simulating a large numer of nodes.