Thread Links | Date Links | ||||
---|---|---|---|---|---|
Thread Prev | Thread Next | Thread Index | Date Prev | Date Next | Date Index |
Hi Mark, Thanks for the email of summary and questions. I have included my thoughts inline below in blue.
To align everyone’s understanding of EBCS related topics, my understanding is that 11bc is targeting a situation where there are many more potential EBCS traffic streams that are advertised by an AP, than the
number of EBCS traffic streams that are actually broadcast by the AP. Therefore in order for the APs to know which EBCS streams to transmit, some degrees of control by requesting STAs need to be provided (Provided that these EBCS traffic streams are clearly
advertised by the AP). Therefore, there needs to be different classes of requesting STAs (unassociated or associated and associated STAs with privileges).
Best regards, Xiaofei Clement Wang Principal Engineer | InterDigital T: (631) 622.4028 From: ** STDS-802-11-TGbc -- Enhanced Broadcast Service ** <STDS-802-11-TGBC@xxxxxxxxxxxxxxxxx>
On Behalf Of Mark Hamilton
I should have copied the ARC reflector on this, too. (Sorry for the duplication, those of you on the TGbc reflector!) Mark From: mark.hamilton2152@xxxxxxxxx <mark.hamilton2152@xxxxxxxxx>
All, To try to recap what I think were comments from today’s TGbc call, and to get discussion/feedback going, here is what I had in mind. Comments/flames/etc. are encouraged!
As we discussed during yesterday’s teleconferences, there seems to be three types of EBCS traffic streams:
In my mind, to provide EBCS services, it is not just about transmitting the data. There are additional steps such as advertising the EBCS services, as well as controlling the EBCS service (request/response to
start or stop the EBCS service being broadcasted at the local AP. I believe that data transmission of all EBCS DL traffic, independent of category, can use legacy AP architecture to transmit. But there is an additional filter there somewhere to turn on/off streams. For the EBCS traffic of category 3, the advertisement and controlling of the EBCS services are missing from the legacy spec and therefore these are defined in 11bc D1.0. Hence, advertisement by the AP and the ability for an associated
STA to control which multicast/broadcast are broadcast are within scope of TGbc. So the statement “In my understanding, the association required multicast/broadcast is out of scope of TGbc.” seems incorrect. Actually, the TGbc scope should include
advertisement and controlling mechanisms for all categories of EBCS traffic. I am a little pressed to understand why the current architecture cannot support all these EBCS services, which may need an additional filtering functionality .
As the current spec text in 11bc, “associated” or “unassociated” is a concept in the context of EBCS. Certain EBCS streams broadcast by an AP can be started by unassociated STAs, while other EBCS streams broadcast
by an AP can only be started by associated STAs, this is to provide for support for security, or features, e.g., premium level streaming, authorized users (such as a teacher), etc.
EBCS AP has limited indication in its beacons and a public action frame “EBCS Info frame” is used to advertise the services and provide origin authentication. One of the indication in the advertised EBCS services
is that whether a STA needs to be associated to request that EBCS service.
We need a DS because we need to have association STAs for controlling some of the EBCS streams, and the content is provided by servers outside of the portal and needs to be distributed to the EBCS APs.
While the content is provided by the higher layers, the choice of which EBCS streams are broadcast by the AP is controlled by the AP and the STAs served by the AP (associated or unassociated).
I agree. I believe that the current version of 11bc, we are only dealing with enabling the AP to start/stop broadcasting EBCS traffic at its local level, not the start of stop of the traffic stream that may be
coming from a server. Comments? Arguments? What did I forget to include (as well as what do you think I got wrong)? Mark To unsubscribe from the STDS-802-11-TGBC list, click the following link:
https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGBC&A=1 To unsubscribe from the STDS-802-11-TGBC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=STDS-802-11-TGBC&A=1 |