TSMP is a networking protocol that forms the foundation of reliable, ultra low-power wireless sensor networking. It provides redundancy and fail-over in time, frequency and space to ensure very high reliability even in challenging radio environments. TSMP also provides the intelligence required for self-organizing, self-healing mesh routing. The result is a network that installs easily with no specialized wireless expertise, automatically adapts to unforeseen challenges, and can be extended as needed without sophisticated planning.
This document provides a technical survey of Wireless Sensor Network (WSN) solutions and describes the Time Synchronized Mesh Protocol (TSMP). TSMP is designed as a media access and networking protocol specifically for low-power, low-bandwidth reliable networking, forming the foundation for self-organizing networks.
The overview details five key components that contribute to end-to-end network reliability: time synchronized communication using TDMA, frequency hopping to avoid interference, automatic node joining and network formation, fully redundant mesh routing, and secure message transfer. It explains how these mechanisms allow the network to adapt to changing environments and maintain high reliability despite RF interference or node loss.
| Operating Frequency Bands | 2.4 GHz ISM band and 900 MHz ISM band |
|---|---|
| Maximum Packet Size | 127 B (IEEE 802.15.4 standard) |
| Protocol Basis | TDMA (Time Division Multiple Access) |
Current TSMP implementations operate in the 2.4 GHz ISM band on IEEE 802.15.4 radios and in the 900 MHz ISM band on proprietary radios.
TSMP reserves 47 B for operation, which leaves 80 B for payload within the maximum 127 B packet size.
A longer frame length decreases refresh rate, thereby decreasing bandwidth and decreasing power consumption.