[SIPForum-discussion] What is the use of creating session

[sayan.chowdhury at wipro.com]

Hello Harish , 
IMHO, you are confusing the concepts of a session and a dialogue .. the RTP you are talking of is a session. (so the actual media you are exchanging constitutes a session eg video session , audio session etc). 
This is what you want to do (i.e. establish some kind of session) , and is the basic purpose of SIP. 
 
A SIP dialogue , is a different thing , it's a "context" within which single or more types of sessions can be established , establishing a dialogue , among other things facilitates routing of SIP requests that relate to the same "context" (for example messages for re negotiation of session parameters) .. 
Hope this helps. 
Regards ,
Sayan 
 
 
 

________________________________

From: discussion-bounces at sipforum.org on behalf of harish T
Sent: Mon 1/29/2007 7:50 PM
To: Krishna Kishore G
Cc: discussion at sipforum.org
Subject: Re: [SIPForum-discussion] What is the use of creating session


Hi Kishore,

I accept your view, to exchange data  between  UserAgents i should follow some rules,so i we are using protocol(SIP). 

Even i accept SIP(to be precise SDP),carry information about session.


Here i am not telling i am not using SIP protocol.Instead i am telling i am not creating\establishing session.

But my doubt is :
By using SIP (Without establishing session ) i can get user's location,and i hope  i can tell what kind of data user should except by using SDP that too without creating session . 
Then what is the use in creating session,since we are able to communicate without creating session ?(Please correct me if i am wrong)

Regards 
Harish.T






On 1/29/07, Krishna Kishore G <gkittu at gmail.com> wrote: 

	Hi Harish,
	        Putting aside the statement '"no where we are using SIP for 
	doing call", just by knowing UAC address and rtp packets session
	cannot be established in all conditions. You need to know the media
	capabilities  of that UAC. This all info should be exchanged by means
	of some protocol.
	Using SIP protocol we are doing the same.
	Regards
	kishore
	
	On 1/29/07, harish T <harish0611 at gmail.com> wrote:
	> Hi friends,
	>
	> What is the use of creating session using SIP...Just to know ONLY user
	> information are we using Session?
	>
	> Even without Session i hope we can do a call,send message by using necessary
	> protocol(because no where we are using SIP for doing call..)... 
	>
	> Are we using session just to validate User?..If there is any other reason
	> please let me know,or else if you have any link please forward it to me
	> ...it will be helpful for me..
	>
	>
	> --
	> ------------------------------------------------------
	> To accomplish great things, we must not only act, but also dream; not only
	> plan, but also believe.
	>
	>
	>
	> With regards
	> Harish.T
	>
	>
	
	
	--
	Thanks &regards
	G.Krishna Kishore
	




-- 
------------------------------------------------------
To accomplish great things, we must not only act, but also dream; not only plan, but also believe. 



With regards
Harish.T 
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