What is Proof of Coverage?

Proof of Coverage (PoC) is an algorithm that works to prove network connectivity and location of Hotspots that are operating on the Helium Network. The participants of this process are then rewarded if the network connectivity and location of their Hotspot is confirmed. The success of the Helium Network is dependant on the amount of reliable coverage that it can provide for users so that they are able to connect their low-powered IoT devices.

If we were to simplify the process of PoC, then one could say that it is a mutual verification of the wireless coverage provided by numerous Hotspots on the Network. The Helium Blockchain automatically stores the data that is generated from the ongoing verification of network connectivity and coverage in order to maintain a record of transactions between users and hotspots, as well as to provide PoC rewards.

Helium’s “Proof of Coverage challenges” is the mechanism through which the Blockchain continuously interrogates Hotspots. Whenever a new challenge is broadcasted, the Blockchain records more data about the quality of the Network. There are three basic roles in the PoC challenges: challenger, transmitter, and witness.

Challenger is the Hotspot that creates and issues the PoC challenge, otherwise known as a beacon. Hotspots issues Challenges once per every 360 blocks.

A Transmitter also known as “Challengee” is the target Hotspot in the PoC Challenges and transmits challenge packets which are to be witnessed by geographically proximate Hotspots.

The Witness Hotspot reports the existence of the challenge packet after it has been transmitted.