Your rewording looks good. One minor suggestion for REQ 15:
<t hangText="REQ 15:"> In cases where a network element fails, is so
overloaded that it cannot process messages, or cannot communicate due to a
network failure or network partition, it will not be able to provide explicit
indications of the nature of the failure or its levels of congestion. The
mechanism must properly function in these cases. </t>
I would like to point out that TCP, IP and several other transport
protocols have evolved in the same direction as I am advocating for SIP:
the only robust indication that an error has occurred is connection
True, and we absolutely need to utilize that. However, I do not believe this
eliminates the utility of explicit congestion indicators, as ECN provides
(for example), as a way to further improve performance.
Normally ECN only reduces latency. My usual metric for performance is
throughput, which is not generally improved by ECN. But point taken. And it
doesn't effect the document.
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