Re: [STDS-802-3-EPOC] Scheduling Probes period usage
Duane,
Thanks. Understood and agreed.
For the probes and ranging we can have multiple CNUs sending them on the same probe periods. In normal cases 2-symbol probes could be adequate so 2-3 CNUs could transmit on the same probe period. For discovery and ranging we can allow several CNUs sharing the probe period on different subcarriers.
So for probes we would need a way to define probe symbols per CNU, and for discovery or ranging subcarriers per CNUs.
This could help to shorten acquisition time and probe cycles.
Avi
From: Duane Remein [mailto:Duane.Remein@xxxxxxxxxx]
Sent: Monday, August 11, 2014 5:22 PM
To: Avi Kliger; STDS-802-3-EPOC@xxxxxxxxxxxxxxxxx
Cc: Duane Remein
Subject: RE: Scheduling Probes period usage
Avi,
I apologize if I wasn't clear. In San Diego we define the US Superframe to begin with a Probe period (5-6 symbols) which would also be used for Discovery and Fine Ranging times. In terms of scheduling we need to do the following
1) Which CNU is to use the probe period for it's primary purpose of probing - this is probably something like a list of frame ids and associated CNU_IDs.
2) For fine ranging, it is possible to use the Probe for multiple CNUs; again which frames are to be used for fine ranging and which CNUs are scheduled to use which Fine ranging period or slot (we haven't discussed terminology here but if each 5-6 Symbol Probe period can be used by multiple CNUs we need a mechanism to decide which one uses which subcarriers).
3) For Discovery we need a mechanism to inform all CNUs which Probe Period is available for Discovery Response.
I agree with your assessment that, once a CNU is properly ranged, it will know when the probe period occurs and we can create and reference some frame counter to identify each frame/probe period. For the Discovery window it is slightly more difficult as new CNUs don't know the frame reference and, in this case, the only timing reference we have is the DS timestamp.
For all of the above we need precise definitions of the registers or variables we transfer over the PHY Link.
Best Regards,
Duane
FutureWei Technologies Inc.
duane.remein@xxxxxxxxxx<mailto:duane.remein@xxxxxxxxxx>
Director, Access R&D
919 418 4741
Raleigh, NC
From: Avi Kliger [mailto:akliger@xxxxxxxxxxxx]
Sent: Sunday, August 10, 2014 10:09 AM
To: Duane Remein; STDS-802-3-EPOC@xxxxxxxxxxxxxxxxx<mailto:STDS-802-3-EPOC@xxxxxxxxxxxxxxxxx>
Subject: RE: Scheduling Probes period usage
Duane,
I'm sorry, not sure what you mean by Probing band. Are you asking how to schedule the probe intervals within the superframe, or how to schedule discovery and fine ranging messages within the probe intervals?
For the first, one option could be a start of frame time indication that should suffice as all CNUs are in-sync to the CLT times and superframes symbols.
The second is a mapping command. Maybe, I didn't understand the question ...
From: Duane Remein [mailto:Duane.Remein@xxxxxxxxxx]
Sent: Friday, August 08, 2014 12:51 AM
To: STDS-802-3-EPOC@xxxxxxxxxxxxxxxxx<mailto:STDS-802-3-EPOC@xxxxxxxxxxxxxxxxx>
Subject: [STDS-802-3-EPOC] Scheduling Probes period usage
In San Diego we consolidated Probes, PHY Discovery Response and Fine Ranging in the same freq/time band (5-6 symbols at the beginning of the US frame which is 261-262 symbols long. I've been mulling over how we might want ot schedule use of the Probing band and was wondering if anyone else has given this any thought?
Best Regards,
Duane
FutureWei Technologies Inc.
duane.remein@xxxxxxxxxx<mailto:duane.remein@xxxxxxxxxx>
Director, Access R&D
919 418 4741
Raleigh, NC
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