RE: stds-802-16-mobile: Sleep window parameters in Table 275a
Hello all,
The Max_Sleep_Interval value does not necessary defines the
one that will be used for a specific MSS, there should be
specific parameters per MSS (as done today when requesting to
enter to sleep mode), since it depends on the MSS traffic
pattern. The value defines an Upper bound to all MSSs. The
considerations when selecting a working and Maximum sleep
interval should come from a different direction.
As I see this, it should be a tradeoff between power saving
and tolerable traffic delay. I think that this value should
be nominal (and not frame based) and should stand in the area
of 900 ms - 1 sec (which is used in the literature).
So, I would recommend to :
1. Retain this value, and not delete it as Phil suggested
2. Set the value to 1sec.
Best Regards,
Itzik.
-----Original Message-----
From: owner-stds-802-16-mobile@majordomo.ieee.org
[mailto:owner-stds-802-16-mobile@majordomo.ieee.org]On Behalf
Of Ofer Kelman
Sent: Sunday, November 02, 2003 15:46
To: Phillip Barber; stds-802-16-mobile@ieee.org
Subject: RE: stds-802-16-mobile: Sleep window parameters in
Table 275a
Phillip and all,
I agree that the 5 frames duration may me too small of a
period, but at the same time 4096 is much too much. To my
understanding, the sleeping interval should be around 10
times of the listening time. This gives us some 90% power
savings in time. to get better percentage the sleep interval
grows too much. For example take a ratio of 20 frames sleep
and 2 frames listening time. It is around 89% power saving
(taking into consideration that the "wake-up" process
consumes more power then continues operation). While 30
frames of sleep with 2 listening frames goes to 96%. This
shows that the additional 7% of saving costs 30% in sleeping
time.
I would recommend 30 to be the maximum value.
Ofer
-----Original Message-----
From: Phillip Barber [mailto:pbarber@broadbandmobiletech.com]
Sent: 28 October, 2003 6:16 PM
To: stds-802-16-mobile@ieee.org
Subject: stds-802-16-mobile: Sleep window parameters in Table
275a
Itzik and all,
I have been working on a revision to Table 275a. A few
observations:
SS/Max_Sleep_Interval/Max. Value seems very low. Shouldn't
this be something more like 4,096 frames or more?
For SS/Listening_Interval/Min. Value, didn't we settle on 4
frames at Session 27?
Thanks all.
Table 275a-Parameters and Constants
System
Name
Time Reference
Min. Value
Default Value
Max. Value
SS
Min_Sleep_Interval
Minimum sleeping time allowed to SS
2 Frames
SS
Max_Sleep_Interval
Maximum sleeping time allowed to SS
5 Frames
SS
Listening_Interval
The time duration during which the SS, after waking up and
synchronizing with the DL transmissions, can demodulate
downlink transmissions and decides whether to stay awake or
go back to sleep
BS
BEA-ADV interval
Nominal time between transmission of BEA-ADV messages
30s
BS
ASC-AGING-TIMER
Nominal time for aging of MSS associations
100ms
BS
Neighbor_Info interval
Nominal time between transmission of Neighbor_Info messages
600s
BS
Neighbor-Aging-Timer
Nominal time for aging of BS neighbor association and
removal from the dynamic Neighbor BS table
3600s
Thanks,
Phillip Barber