Why intermittent computing could unlock low-power visible light communication

Abstract

Intermittent computing could be combined with low-powered visible light communication systems to facilitate novel sensor networks. This position paper provides a framework for future research by highlighting synergies between the technologies, and explores how techniques developed in intermittently-powered systems can be used to provide enhanced stability to ultra-low power visible light communication.

Data Freshness in Mixed-Memory Intermittently-Powered Systems

“…The sensed data is then processed and transmitted, e.g. wirelessly through a low-powered LED [7], to a central collecting unit.…”

“…Processing ≜ Pi + Dh, Checkpointing (7) where f and h are the number of system fails and the number of successfully performed checkpoints during the period of time Y i , respectively. The time between data being sensed and a packet being transmitted, the completion time, for cycle i is…”

“…To identify the expected values of AoI in ( 5) and ( 6), and hence understand the freshness of data produced by the modelled IPD, we must first find the expected values of ( 7) and ( 8) over many cycles. We assume that all variables in (7) and ( 8) have well-defined means and known variance. Due to the assumed ergodicity of the system we can also simplify notation when taking the expected values of variables (for example, the expectation of I i is E[I] as t tends to infinity).…”

“…Proof. A single-memory device comprised of entirely VM, following the same formulation as (7), would have an intercompletion time of…”