Hi Keoma, As you say, there is no row for two short addresses without a PAN ID present. My assessment of this was that this is not allowed as it is not consistent with frame version 0/1 use of PAN ID. However, the table does have the row:
Extended Extended Not Present Not Present 1 which suggests it is possible to have two extended addresses without a PAN ID present. However this is inconsistent with frame version 0/1. Robert On 5 October 2017 at 18:57, Keoma <[email protected]> wrote: > Hi Robert, > > Thank you for the answer. > > What about the second question ? > "can you confirm that there is no way to omit both Source and > Destination PAN ID while using Source and Destination Short Addresses ?" > I was using the compression bit to omit both PAN-ID in previous 802.15.4 > implementation. > > Thank you, > > Keoma > > On 05/10/2017 10:36, Robert Cragie wrote: > > I recall similar concerns with PAN ID compression a couple of years ago. > > See: > > > > https://mailarchive.ietf.org/arch/msg/6tisch/G24yEB7a48owwlL3nJZgteuSswE > > > > This was before 802.15.4-2015 came out and the footnote to table 7-2 > > actually seems wrong to me. > > > > To answer your question: Set PAN ID compression to 1. > > > > Robert > > > > On 4 October 2017 at 19:41, Keoma <[email protected] > > <mailto:[email protected]>> wrote: > > > > Hi, > > > > After looking at the 802.15.4-2015 standard, I am not 100% of how to > > implement the Frame Control Field, in particular regarding the PAN ID > > Compression. > > > > - Both my Source and Destination Address fields are Short. > > - My Source PAN ID and Destination PAN ID are identical > > - I don't want the Source PAN ID and Destination PAN ID to appear > twice > > > > According to the Table 7-2 I am tempted to set the PAN ID > Compression to > > 1 and to omit the Source PAN ID field. > > > > Here is the note that confuses me (Table 7-2, p153): > > "If both the destination and source addressing information is present > > and either is a short address, the MAC sublayer shall compare the > > destination and source PAN IDs and the PAN ID Compression field > shall be > > set to zero if and only if the PAN identifiers are identical." > > > > Should I set the PAN ID Compression to 1 or not ? > > > > Also, can you confirm that there is no way to omit both Source and > > Destination PAN ID while using Source and Destination Short > Addresses ? > > > > Thank you, > > > > -- > > Keoma Brun-Laguna > > Inria - EVA Team > > https://kbl.netlib.re > > (+33)180494139 <tel:%28%2B33%29180494139> > > (+33)684015496 <tel:%28%2B33%29684015496> > > > > > > _______________________________________________ > > 6tisch mailing list > > [email protected] <mailto:[email protected]> > > https://www.ietf.org/mailman/listinfo/6tisch > > <https://www.ietf.org/mailman/listinfo/6tisch> > > > > > >
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