Figure 24.
A close look of the asynchronous protocol, where each transmitter being activated after a random length of time window, and the receiver firstly listens for an identifier, then samples the strength after an identifier is received.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.