A word of warning: once the picture or video has been shot, it will send immediately, there is no confirmation or edit screen, so make sure you don't test this one while sitting on the toilet.
You also get access to your subscriber list, can schedule or send immediately, auto-share to social channels and view open rates.
In the proactive approaches, a CR user regularly searches for unoccupied channels, and record the properties of sensed channels in the form of table (such as channel occupancy and signal-to-noise ratio), even though it has no data to send immediately.
The backoff procedure in 802.11 works as follows: (i) draw an integer from a uniform distribution, where CW refers to the current contention window, (ii) multiply this integer with the slot time derived from the PHY layer in use, and set this as the backoff value, (iii) decrease the backoff value only when the channel is free, (iv) upon reaching a backoff value of 0, send immediately.
This all took 13 days from when the quake hit--longer than it would have if we just selected items to send immediately, but based on what I saw here, was the right thing to do.
"One hardly conceives of a commander, informed of the approach of a column of the enemy, so far away they are only visible through field glasses, getting sufficiently panic stricken to send immediately for help saying he is besieged by a thousand Mexicans.
