Central Control Computer
From Wookieepedia, the Star Wars wiki.
Before the Invasion of Naboo, the droids of the Trade Federation used battle droids that were all subject to a central computer. This computer, located on an orbiting command ship or station, would allow the droid control program to instantly relay information and orders from unit to unit no matter where they were on the planet.
The weakness to this system was shown during the Battle of Naboo. Once the command station was destroyed by young Anakin Skywalker, all the droids simply froze where they were. Jar Jar Binks summed up the situation with these words: "Dees'a broken!" Also, if the channels were jammed, the once deadly army would be reduced to pieces of statuary.
This technique would lose favor with CIS battle droids during the Clone Wars.
As early as 3,951 BBY, in a similar way the droid control center on the Visionary controlled thousands of droids, on Nar Shaddaa and elsewhere.
