  The next generation of interactive satellite terminals is going to play a
crucial role in the future of DVB standards. As a matter of fact in the current
standard, satellite terminals are expected to be interactive thus offering
apart from the possibility of logon signalling and control signalling also data
transmission in the return channel with satisfying quality. Considering the
nature of the traffic from terminals that is by nature bursty and with big
periods of inactivity, the use of a Random Access technique could be preferred.
In this paper Random Access congestion control in DVB-RCS2 is considered with
particular regard to the recently introduced Contention Resolution Diversity
Slotted Aloha technique, able to boost the performance compared to Slotted
Aloha. The paper analyzes the stability of such a channel with particular
emphasis on the design and on limit control procedures that can be applied in
order to ensure stability of the channel even in presence of possible
instability due to statistical fluctuations.
