Wireless redstone signal in Vanilla Minecraft with command blocks

I'm looking for a method to give a wireless redstone signal to a bunch of command blocks under iron doors in order to open them on distance on sunrise.. I'm not asking you to help me with the daylihgt sensor part, I'm just looking for a command to give to, for example, command block "A" in order to, when powered, gives a wireless signal to the command blocks "B" "C" "D" "E" and so on..

Template:

Use this wireless redstone setup (Our door is at -90 102 159):

Command block left: /setblock -89 102 159 air

Command block right: /setblock -89 102 159 redstone_torch

The pig is just an ordinary pig.

You can easily use more command blocks for more doors.