Reduced Processor Load for Wireless Communication Between Master Unit and Sensor Unit

摘要

A system and method of communicating efficiently and reliably between a sensor unit and a master unit, especially in a wireless system, is provided. The disclosed techniques require only minimal processing by the sensor unit for communications purposes and as such, the described system and method can be implemented in systems with tight constraints on the sensor unit side in terms of required memory, power consumption, and cost, such as in wearable sensor systems.

主权项

1. A method of communicating between a master unit and at least one sensor unit to be executed within a frame, wherein the at least one sensor unit has one or more sensing channels and is configured to have a data sampling frequency for sampling in time one or more of its sensing channels and is adapted to calculate and transmit time integrated samples, and the master unit is configured to receive and process said integrated samples, the method comprising the steps of:
integrating by the at least one sensor unit sample values up to a current sequence number; transmitting during a portion of a frame by the at least one sensor unit integrated sample values and an identification of the current sequence number; receiving by the master unit the integrated sample values and the identification of the current sequence number; storing by the master unit one or more received integrated sample values and the identification of current sequence number in a register; and upon receiving at least second time integrated sample values and the identification of samples sequence number, calculating by the master unit sample values differences between current received integrated sample values and integrated sample values stored in the register.