Re: [MMUSIC] draft-holmberg-mmusic-t140-usage-data-channel - multi-party

Christer Holmberg <christer.holmberg@ericsson.com> Mon, 26 August 2019 09:15 UTC

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From: Christer Holmberg <christer.holmberg@ericsson.com>
To: =?utf-8?B?R3VubmFyIEhlbGxzdHLDtm0=?= <gunnar.hellstrom@omnitor.se>, "mmusic@ietf.org" <mmusic@ietf.org>
Thread-Topic: [MMUSIC] draft-holmberg-mmusic-t140-usage-data-channel - multi-party
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Date: Mon, 26 Aug 2019 09:15:41 +0000
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Subject: Re: [MMUSIC] draft-holmberg-mmusic-t140-usage-data-channel - multi-party
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Hi,

>I can accept to not include "the T140 data channel data format".
  
Note that we are not restricting how the problem can be solved in the future. It's a note, and the sentence contains an "e.g.," in the so we are just giving examples :)

Regards,

Christer
  


    
    Den 2019-08-26 kl. 09:33, skrev Christer Holmberg:
    > Hi Gunnar,
    >
    >>>>> So, what about the following text:
    >>>>>
    >>>>> "If an implementation needs to support multi-party scenarios,
    >>>>> implementations (both clients and servers) need to support multiple
    >>>>> simultaneous T.140 data channels, one for each source. At the time of
    >>>>> writing this document, this is true even in scenarios where each participants
    >>>>> communicate via a centralized conference server. The reason is that, unlike
    >>>>> RTP media, WebRTC data channels and the T.140 protocol do not support the
    >>>>> indication of the source of T.140 data.
    >>>> "participants" s.b. "participant"
    >>> Will fix.
    >>>
    >>>>> NOTE: Future extensions to T.140, or to the T140block, might allow
    >>>>> indicating the source of T.140 data, in which case it might be possible to use
    >>>>> a single T.140 data channel to transport data from multiple sources."
    >>>> Should also "the T140 data channel data format" be among the options for where to place the source information?
    >>> What is the "data format"? Isn't the T140block the data format?
    >>     
    >>     Currently yes, but a more complex format could be defined, e.g. with a
    >>     structure containing a source indicator and the T140blocks with some
    >>     separator or structure. Of coulse it would be best to have that
    >>     structure in place already from the beginning in this draft, so that
    >>     there will be no interworking problems when a source address is
    >>     introduced. Or at least a specified way to extend the format.
    > Yes. But, again, that work would have to be done elsewhere. It is not within the charter of MMUSIC to define media plane formats.
    >
    > Regards,
    >
    > Christer
    >   
    >
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    -- 
    -----------------------------------------
    Gunnar Hellström
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    gunnar.hellstrom@omnitor.se
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