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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>All,<o:p></o:p></p><p class=MsoNormal>After thinking over the last presentation on BP QOS extension block content, specifically the discussion about the reliability code points proposed, I think there may be a more consistent way to name and think about the proposed values.<o:p></o:p></p><p class=MsoNormal>The last proposal had values of (from what I remember, in no specific order):<o:p></o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Required reliable<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Preferred reliable<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Preferred unreliable<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Required unreliable<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>There was contention about what “required” meant and if they are meaningful values, but I think these can be augmented slightly with the knowledge that BP nodes are expected to store-and-forward as needed, so the code points could be shifted slightly to have these names and definitions which I think are more compatible with both what nodes should do with them and how people can think about them.<o:p></o:p></p><ul style='margin-top:0in' type=disc><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Wait for reliable – Wait (up to the bundle lifetime) for a reliable CL, if one is expected to become available, otherwise use an unreliable CL now.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Immediate reliable – Forward with a reliable CL if one is available immediately, otherwise use an unreliable CL now.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Immediate unreliable – Forward with an unreliable CL if one is available immediately, otherwise use a reliable CL now.<o:p></o:p></li><li class=MsoListParagraph style='margin-left:0in;mso-list:l0 level1 lfo1'>Wait for unreliable – Wait for an unreliable CL, otherwise use a reliable CL now.<o:p></o:p></li></ul><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The key difference here is that nodes have future information about local contact plans and CL availability, and the first and last values allow that information to be used differently. So rather than saying “it has to be reliable or nothing” it’s allowing a node to take into account future expected behavior (within the specific bundle’s lifetime) to inform its short-term logic.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Not sure if this is helpful, but that kind of distinction might clarify the intent of those code points and make them each more actionable by a node.<o:p></o:p></p><p class=MsoNormal>Brian S.<o:p></o:p></p></div></body></html>