Re: [MMUSIC] Possible BUNDLE alternative syntax: explicit m-line for bundled session

"Ejzak, Richard P (Richard)" <richard.ejzak@alcatel-lucent.com> Thu, 20 September 2012 13:15 UTC

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From: "Ejzak, Richard P (Richard)" <richard.ejzak@alcatel-lucent.com>
To: Lishitao <lishitao@huawei.com>, Christer Holmberg <christer.holmberg@ericsson.com>, "mmusic@ietf.org" <mmusic@ietf.org>
Thread-Topic: [MMUSIC] Possible BUNDLE alternative syntax: explicit m-line for bundled session
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Date: Thu, 20 Sep 2012 13:14:44 +0000
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Subject: Re: [MMUSIC] Possible BUNDLE alternative syntax: explicit m-line for bundled session
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On Sep 20, 2012, at 1:22 AM, Lishitao wrote:
> Maybe another way round, the sender can always send the initial offer with
> bundle, then if the other end does not supports,
> the sender can send an update SDP offer without using bundle.

But then it will take two transactions to negotiate bundle whereas the other proposal allows negotiation of media with or without bundle during the first offer/answer exchange.  The second offer/answer is primarily to avoid misrepresenting the use of transport flows to intermediates.