Re: [STDS-802-16] a question on UGS
Hi all,
I think you could have an increased overhead (fragmentation...) and scheduler
complexity in both cases:
- with the opportunity of a "permanent" assignment of the BW
- BW assignment on frame basis.
The increased overhead is a consequence of the lack in the available bandwidth
and of scheduler design choices.
In any case, I think that a "permanent" assignment of the BW for the UGS traffic
class can potentially be a good idea to improve system efficiency.
Best regards
Roberto Albanese
Quoting Itzik Kitroser <itzikk@RUNCOM.CO.IL>:
> Weidong,
>
> You need to think also about the consequences of going in your approach, and
> possible effect on the scheduler it can cause.
>
> Taking your approach, the scheduler will have to map allocations "around"
> multiple fixed allocations, which will not necessary be segmented together,
> this can both increase the complexity of the scheduler and also add more
> overhead both to the MAP (more entries when fragmenting) and allocating more
> BW per request, again due to additional fragmentation header.
>
> Regards,
>
> Itzik.
>
> _____
>
> From: owner-stds-802-16@LISTSERV.IEEE.ORG
> [mailto:owner-stds-802-16@LISTSERV.IEEE.ORG] On Behalf Of weidong yang
> Sent: Tuesday, March 08, 2005 12:35 AM
> To: STDS-802-16@LISTSERV.IEEE.ORG
> Subject: Re: [STDS-802-16] a question on UGS
>
>
> Baraa,
>
> In this case, the overhead due to DL_MAP & UL_MAP IEs could be very
> substantial if lots of conversations are going on.
> (I did a search, and found this issue was raised in IEEE C802.16e-04/368r2
> by KT & Korea University)
> I don't know whether other people also think this is a serious problem.
>
> -----Original Message-----
> From: Al Dabagh, Baraa [mailto:baraa.al.dabagh@INTEL.COM]
> Sent: Monday, March 07, 2005 4:05 PM
> To: STDS-802-16@LISTSERV.IEEE.ORG
> Subject: Re: [STDS-802-16] a question on UGS
>
>
>
> Correct.
>
>
>
>
> _____
>
>
> From: owner-stds-802-16@LISTSERV.IEEE.ORG
> [mailto:owner-stds-802-16@LISTSERV.IEEE.ORG] On Behalf Of weidong yang
> Sent: Monday, March 07, 2005 1:54 PM
> To: STDS-802-16@LISTSERV.IEEE.ORG
> Subject: [STDS-802-16] a question on UGS
>
>
>
> Dear all,
>
> I have a question on UGS.
>
> After reading the 802.16-2004 document, I come to the understanding
>
> suppose we want to set up a voice conversation over 802.16-2004, in every
> frame (let us assume
>
> the frame duration is 10 ms) where a downlink burst or an uplink burst for
>
> that conversation is assigned, the assignment(s) has/have to be signified
> through DL_MAP and UL_MAP,
>
> there isn't a way to make a "permanent" assignment for that conversation, so
> the assignments don't have to
>
> be specifed each time in DL_MAP or UL_MAP. Is my understanding correct?
>
>
>
> Weidong
>
>
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