A cluster brain/Hive mind would be one option and splitting the brain across several robots. However - No need to have the computing/brain in the robot at all.

A cluster brain/Hive mind would be one option and splitting the brain across several robots. However - No need to have the computing/brain in the robot at all. Equally a group of these robots sharing sensor data would make some central processing design even more suitable and allows the robots to not be limited by just their own sensors. So many upsides with that aspect. Onboard you would need very limited processing and wireless comms and that would be it, all the intelligence can then be offloaded and would also make such robots cheaper and less energy dependant. More so as with lower power usage, wireless powered becomes much easier, as well as offer a wireless communication channel using ambient backscatter.