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Note added regarding reliable and ordered transmission #34

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Sep 30, 2019
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Note added regarding reliable and ordered transmission #34

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Note added regarding reliable and ordered transmission
cdh4u Sep 26, 2019
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Bernard A added to Acknowledgements
cdh4u Sep 26, 2019
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13 changes: 12 additions & 1 deletion draft-ietf-mmusic-t140-usage-data-channel.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -129,6 +129,17 @@
<c>Label</c>
<c>See <xref target="sec.sdp.dcmap"/> and <xref target="sec.gw"/></c>
</texttable>
<t>
NOTE: T.140 requires the transport channel to provide transmission of real-time text without
duplication and in original order. Therefore, T.140 does not specify reliable and ordered
transmission of T.140 data on the application layer. Instead, when RTP based transport is used,
the RTP sequence number is used to detect packet loss and out-of-order packets, and a redundancy
mechanism using the RTP timestamp is used to achieve reliable delivery of T.140 data. By using
the WebRTC data channel reliable and in-order transmission features <xref target="I-D.ietf-rtcweb-data-channel"/>
for the T.140 data channel, there is no need for a redundancy mechanism or a mechanism to detect
data loss and out-of-order delivery on the application level. The latency characteristics of the
T.140 data channel is also regarded to be sufficient to meet the application requirements of T.140.
</t>
</section>

<section anchor="sec.sdp" title="SDP Considerations">
Expand Down Expand Up @@ -847,7 +858,7 @@ Answer:
<t>
Thomas Belling provided useful comments on the initial (pre-submission) version
of the draft. Gunnar Hellstrom provided comments and text on the draft. Paul
Kyzivat provides comments on the draft.
Kyzivat and Bernard Aboba provided comments on the draft.
</t>
</section>
</middle>
Expand Down