Dear Tero, Pat, Robert and all, what about this more explicit text:
"The IEEE802.15.4 header of all frames MUST include the Sequence Number field, the Source Address field and the Destination Address field and only the Destination PANID. Frame Version field MUST be set to 0b10 (Frame Version 2). When using DATA, ACKNOWLEDGEMENT, MAC COMMAND frame types the source and destination address fields MUST be filled with an extended address (64 bit) and this be indicated in the corresponding Frame Control field. The Destination PANID MUST be present, the Source PANID MUST be elided and the PANID Compression bit MUST be clear (0). When using BEACON frame types, the destination address field MUST be filled by a short addresses (16bit), the source address field MUST be filled with an extended address (64 bit) and this be indicated in the corresponding Frame Control field. The Destination PANID MUST be present, the Source PANID MUST be elided and the PANID Compression bit MUST be set (1)." Question: Do we cover with this a) people sticking to current 2012 amendment as published today, b) people sticking to new version coming soon? Question: Should we say something about Multipurpose frames? regards, Xavi 2015-07-22 14:55 GMT+02:00 Tero Kivinen <[email protected]>: > Xavier Vilajosana writes: > > thanks, you are right. The proposed text is already indicating that. > > > > "In case of a destination broadcast address, the address field MUST > > be filled by a short address (16bit)." > > Yes, but it might be good to say that explictly, as both data frames > (extended and extended addresses) and beacons (extended and short > addresses) both have only one PAN ID (destination PAN ID), and still > they have different values for PAN ID Compression field. I.e. with > extended and extended that is zero, and with extended and short that > is one... > > > 2015-07-22 13:31 GMT+02:00 Tero Kivinen <[email protected]>: > > > > Xavier Vilajosana writes: > > > From the attached document what we need is (row 7) > > > > > > Extended Extended Present Not Present 0 > > > > For normal data frames yes, but not for periodic enhanced beacons, as > > those will be sent to the broadcast address, i.e. the 2nd last row: > > > > Extended Short Present Not Present 1 > > > > This is because the broadcast address is presented as short address > of > > 0xffff. And as the Source PAN ID and Destination PAN ID are same (or > > actually you only have one meaningfull PAN ID), you need to compress > > them and send only one, and set the PAN ID compression bit to 1. > -- > [email protected] >
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