The research and implementation of mobile sink for the regional information monitoring system based on WSN

摘要

As a new area of research, Wireless Sensors Network (WSN) has played a significant role in regional information monitoring area for its potential practical value. However, the promotion of WSN has been limited because of its short lifetime. In a traditional multi-hop WSN, the nodes close to the static Sink easily suffer the energy failure for transmitting large amounts of extra data. This leads to an "energy hole" phenomenon in WSN and finally causes the early death of the whole network. To solve this problem, a mobile Sink was brought in to balance the energy consumption of the whole network. This Mobile Sink Wireless Sensors Network (MSWSN) has recently received a lot of attention from the research community. Based on this view, the paper presents a design proposal of a mobile Sink used in regional monitoring area. To achieve the design requirement, the hardware platform is designed based on a LM4F232H5QD ARM Cortex-M4F processor and the driver program and applications are designed based on embedded real time operation system μC/OS-Ⅲ. This mobile Sink could not only transmit data, but also calculate its location and reveal the information on OLED. Compared with traditional WSN, MSWSN shows appealing characteristics of providing longer network lifetimes and the flexibility to adapt dissemination strategies according to applications' requirements and has proved to be more efficient.