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Improving energy efficiency in communication capable devices

This physical layer modulation protocol provides a means of reducing energy consumption in communication capable devices that are unable to support higher layer constellation protocols, such as adaptive clustering, allowing real-time trade-offs to be made between energy efficiency and latency in order to individually optimise ‘Internet of Things’ devices.

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  • Internet of Things
  • Sensor networks
  • Low energy communication systems


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The energy consumption and data latency needs of ‘communication capable’ devices will continue to diversify and grow with the advent of new communication technologies, such as those required for the Internet of Things. Most communication systems are optimised for data throughput and minimisation of data transmission errors, at the expense of energy efficiency. Improving energy efficiency in these systems has previously focussed on whole network efficiency, without considering the potential flexibility available through exploitation of the differing latency requirements of individual delay tolerant devices.


Random Number Modulation (RNM) offers a simple physical layer modulation scheme that harnesses a random number generation (RNG) to provide more energy efficient communication for applications tolerant to delay.  Through synchronizing the random number generation used for encoding at the transmitter and decoding at the receiver, RNM enables real-time optimisation for energy efficiency and latency-requirements under programmable control. The RNG-based blocks also provide additional security to the transmission, as decoding the signal requires access to both transmitted signal and current synchronization code of the RNG block.


  • Adds real-time, programmable tuning of efficiency/latency specifications to provide rapid and dynamic response for communication capable devices
  • Reduces unnecessary energy consumption between 50%-90% which allows more widespread deployments
  • Simple, cost effective integration without restrictions by hardware or channel selection limitations as this physical layer modulation/coding scheme operates without requiring channel-state information feedback
  • Offers an additional security layer for digital communication systems by unique synchronization of Random Number Generation between the transmitter/receiver pair


  • D. A. Basnayaka DA, and H. Haas, “A new degree of freedom for energy efficiency of digital communication systems” IEEE Trans. Commun., Aug. 2016.

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