As I read, the bottleneck is the cell. If too much connections/traffic at the cell, you have two possibilities:
- Kick out the other cell members (everything beside ‘ask friendly to leave/turn off phones’ i can imagine is illegal).
- Move to another cell.
I’m afraid there is no other solution.
Think about a highway. If you want to drive to work you are fast. But if a lot of equal people want this too, it will jam. You don’t have any (legal) way to turn on a serine and blinking light on the roof of your vehicle.