Alcance
ISO/IEC 15149-1:2014 specifies the physical layer and media access control layer protocols of wireless network over a magnetic field in a low frequency band (~300 kHz) for wireless communication in harsh environment (around metal, underwater, underground, etc.).The physical layer protocol is designed for the following scope:low carrier frequency for large magnetic field area and reliable communication in harsh environment;simple and robust modulation for a low implementation cost and error performance;variable coding and bandwidth for a link adaptation.The media access control layer protocol is designed for the following scope:simple and efficient network topology for low power consumption;variable superframe structure for compact and efficient data transmission;dynamic address assignment for small packet size and efficient address management.ISO/IEC 15149-1:2014 supports several kbps data transmission in wireless network within a distance of several metres. It can be applied to various services such as the following areas:environmental industry to manage pollution levels in soil and water using wireless underground or underwater sensors;construction industry to monitor the integrity of buildings and bridges using wireless, inner-corrosion sensors;consumer-electronics industry to detect food spoilage in wet, airtight storage areas and transfer the sensing data from the inside to the outside;agricultural industry to manage the moisture level as well as mineral status in soil using wireless, buried sensors;transportation industry to manage road conditions and traffic information using wireless, underground sensors.