Radiocrafts has implemented the Polite Spectrum Access technique in our latest RIIM upgrade (to be released) which allows for high-throughput networking by taking the allowed duty cycle in Europe from 1% to around 40%!
As an example, you can now go from 1 packet reaching the Border Router every 4 seconds to 40 packets every 4 seconds.
How is this possible? By combining RIIM operating in the sub-1GHz bands with high RF power, Time-Synchronized Frequency Hopping (TSCH), and Polite Spectrum Access, you truly get the ultimate mesh network in terms of range, reliability, and throughput!
This is a game-changer for applications that require higher throughput such as in street lighting or smart irrigation.
You can read more about this in our latest application note, AN051: High-Throughput Networking with Polite Spectrum Access in RIIM.
By implementing TSCH, radio transmissions are done at several frequencies and time slots in a synchronized manner. Frequency hopping omit challenges with narrowband interference. A packet lost between two devices will be re-sent on a different channel in next available time slot, thus reducing packet loss seen from the application. A TSCH network has proven to have reliability of up to 99.99%!
The Polite Spectrum Access technique consists of two parts:
- Listen-Before-Talk
- Adaptive Frequency Agility
Listen-Before-Talk is a technique where the radio scans the channel which was assigned to it by the TSCH algorithm before transmitting on it. If the channel is found to be noisy, the radio waits and does not transmit on it, dramatically increasing the radio’s resilience to noise.
Adaptive Frequency Agility works by scanning all channels and marking the ones which are often found to be noisy, then it drops those channels from the hopping list which ensures that the radio only uses the best channels with the least noise.
You can watch a demo video about AFA on our YouTube channel, here.
If you are interested in testing RIIM’s latest features for your own application, then Radiocrafts recommends you buy a RIM development kit. The RIIM development kit allows you to quickly and easily create a wireless link or network where you can make a good analysis of the network performance!
You can buy a RIIM development kit here.