According to msf-01 draft autonomous cells MUST NOT be vanished if 6P CLEAR is issued
Throughout the network lifetime, nodes MUST maintain the autonomous
cells as follows:
1. The receive cell MUST always remain scheduled.
2. Whenever a new neighbor is discovered, add a transmit cell for
3. Whenever a new neighbor is removed, remove transmit cell that was
assigned to it.
4. 6P CLEAR MUST NOT erase autonomous cells.