Behcet indicated that the draft does not define how the ending of an IP session 
is detected and stated that one cannot define a Sustained IP address type 
without defining how to detect the ending of an IP session.
Well, we do not think that a draft that extends the Socket interface should 
define how to detect the starting or ending of an IP session. This could be 
done in a separate draft and we are willing to participate in writing one if 
the group thinks it is important and part of the DMM charter.
RFC 5014, which this draft is extending, defines the ability to select 
Home-address or Care-of-address, but does not define how they are created or 
provided to the mobile host (and this is OK). We do not see why the definition 
of IP session begin/end is different.
But Behcet, we can provide some ideas for detecting IP session ending (if you 
are planning to provide a draft):
-       The Mobile host may issue an IP release DHCP message after the Socket 
is closed.
-       The network can detect the FIN sequence for TCP session
-       Watchdog mechanisms may be applied to detect long periods without any 
traffic on a specific 5-touple
But moreover, this draft does not claim that Session-lasting IP addresses Must 
not continue to be valid after the session ends. Networks may continue to 
guarantee there validity even after the session ends and new applications may 
use them in new IP sessions. It states that by requesting a Session-lasting IP 
address, the application informs that it will require a valid IP address 
throughout the IP session. Please refer to the text in the draft that 
explicitly allows both cases.
Regards,
Alper and Danny


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