Re: [6tisch] 6top-interface-04

[Tero Kivinen <[e-mail]>]

Qin Wang writes:
> In the IEEE802.15.4e, there are two attributes related with a cell, i.e.
> LinkOption and LinkType. LinkOption indicates TX, RX, Shared, or Timekeeping;
> and LinkType indicates Normal or Advertising. According to my understanding,
> if the attributes of a cell are set as LinkOption = TX and LinkType=
> ADVERTISING, then the cell can be used as Broadcast cell. Make sense?

LinkType of ADVERTISING means that this link is used to send enhanced
beacons out. There can be other broadcast traffic going out than
enhanced beacons, so I do not think you can only claim that
ADVERTISING links are broadcast cells. 

	ADVERTISING = 1, and indicates the link may be used to send an
	Enhanced beacon.

and

	ADVERTISE links may be used to send Enhanced beacons as the
	result of the MAC receiving a MLME-BEACON.request.

I would assume that broadcast link is something that is defined so
that all devices are listening that, i.e. where the listeners have RX
bit on, and nodeAddr for the sender is set to 0xffff. I do not think
linkType has anything to do with that, but as 6top-interface-04 does
not define what broadcast link/cell means, it is impossible to say.
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