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[Rmt] [EXP2STD] Remaining LCT and ALC issues



All,

 

Three final issues with the update of these two:

 

1)     We have discussed previously (and there is reference in the FEC BB) the possibility for Content Delivery Protocols to provide an indication when a packet contains only source data. This allows the support of FEC Schemes which define different FEC Payload ID formats for such packets – in particular FEC Payload ID information which is only relevant to receivers supporting FEC decoding can be omitted from packets containing only source data.

 

It’s been suggested previously that one of the reserved bits in the LCT header could be used for this purpose. However, LCT is an independent building block from the FEC Building block. A clean implementation of this idea would be for LCT to define these two reserved bits as available for Protocol Instantiation-specific use and for ALC to define the usage above.

 

2)     It has been suggested that the present definition of Sender Current Time (ms since the start of the session) is not very useful and it might be better to replace it with an NTP timestamp. Particularly in the case of FLUTE this would mean that the SCT and FDT Expiry times would be expressed in the same format and relative to the same clock.

 

3)     ALC includes a statement that the IETF had been notified of Intellectual Property Rights with respect to ALC. According to the IETF IPR pages, this is incorrect and so I propose to remove this statement.

 

Comments ??

 

Regards,

 

Mark

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