Synthesis:
The work is summarized in the table of Figure 12 where a comparison of the different systems according to the different issues (1 to 15) is done. The fifteen issues, identified throughout this work, are recalled below:
We use a three levels notation for that table:"-" the issue is not addressed, "+" the issue is a major concern of the system and "+/-" the issue is partially supported. When we have no information, we use a "?".
