Isal,
here are some answers to your questions:
Sorry :), besides the below point to be clarified by you, could you explain
another place which forgets to be added in the below email from the the
figure "B.3" ?
when UA B finishes applying the policies from PSA and PSB in the order, why
does UA B apply policies from PSA and PSB again like the indication from
the step 12 to the step 19? if being session description updated, how does
UA B know to stop applying PSA and PSB? moreover, why should not the step 16
be "SUBSCRIBE<o''', a'''>" ?
Steps (12) to (19) are necessary if a policy contains elements that need
to be shared among policy servers. For example, if both policy servers
insert media intermediaries, then each intermediary needs to know the
address of the other intermediary so that media streams can be exchanged
between them. This is discussed in section 4.5.2.
After two rounds of subscriptions, all policy servers were able to i)
submit their policies and ii) receive infos from other policy servers
(if needed). There is no need for more rounds.
Additionally, there are still another places for the figure 3 and figure 4
in the draft needs to be clarified, can you ?
As follows,
From the context, whether should they be "policy channel
+infoOffer+InfoAnswer" for the step (9) and (10) in the figure 3 and for
+infoOffer+the
step (12) and (13) in the figure 4 in the draft?
I wonder whether it is my fault or other question, such as typo error, other
explanation:)
Good catch! InfoOffer and PolicyOffer is indeed missing in (9) and (10)
in figure 3 and (12) and (13) in figure 4. The figures in the appendix
had the correct flows.
I'll submit an updated version that fixes the bugs.
Thanks,
Volker
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Volker
Hilt
Sent: Wednesday, September 24, 2008 12:02 AM
To: Yuxia Zhang
Cc: [email protected]; [EMAIL PROTECTED]
Subject: Re: [Sip] issues on two different session policies in the
draft"draft-ietf-sip-session-policy-framework-04"
Yuxia Zhang wrote:
hi, all
some issues on two diffrent session policies of draft-ietf-sip-sip
session policy-framework need to be queried. could you help me? thanks.
as follow,
Producedures in the draft only describe the usage of the
session-specific policy, is right? so as for the session-independent
policy, how does UAC retrieve it?
Session-independent policies make use of the config framework
(http://tools.ietf.org/html/draft-ietf-sipping-config-framework-15) as
described in the draft.
it is only through SUBSCRIBE request and only simple interactive, is
it ? Then UA will retrieve the session-indepdent immediately when UA
registering himself into the network as the said in the draft that the
session-independent policy always is applied before the
session-specific policy, is right ?
The UA will get session-independent policies when setting up the
subscription using the config framework as described in section 3.2.
Yes, session-independent policies are applied before session-specific
policies are applied.
if my understanding is right, is it indicated that there is no collide
for retrieve of two different policies, then it is no necessary for
UAC to differentiate the two different policies, so does the policy
server
?
There should be no need for the UA or the policy server to differentiate
between the two policies. They are applied in the order described above.
Thanks,
Volker
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This list is for NEW development of the core SIP Protocol
Use [EMAIL PROTECTED] for questions on current sip
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This list is for NEW development of the core SIP Protocol
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