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Re: [STDS-802-16] Question about ertPS service

Juliana 

I agree with your question. You are right; the maximum sustained traffic rate should not be the grant. The grant should be the minimum reserve traffic rate.
It must be a mistake in the standard text.

 
 Best regards,
 
Avner Aloush

Chief Architect 
DesignArt Networks 
Tel: +972-9-7421306  Ext: 111
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-----Original Message-----
From: Juliana Freitag Borin [mailto:juliana@IC.UNICAMP.BR] 
Sent: Wednesday, June 11, 2008 9:50 PM
To: STDS-802-16@LISTSERV.IEEE.ORG
Subject: [STDS-802-16] Question about ertPS service

 Dear experts,

  I am a little confused about the bandwidth allocation for ertPS connections.
   Session 6.3.5.2.2.1 of the 802.16e-2005 document states the following:
 "By default, size of allocations corresponds to current value of
Maximum Sustained Traffic Rate at the connection..... The BS shall not
 change the size of UL allocations until receiving another bandwidth
 change request from the MS."

   In Session 6.3.14.4.1, the standard states:
 "The maximum sustained traffic rate field specifies only a bound, not
 a guarantee that the rate is available."

 " The Minimum reserved traffic rate parameter specifies the minimum
rate, in bits per second, reserved for this service flow. "

 What rate should be reserved for an ertPS connection, the maximum
sustained traffic rate or the minimum reserved traffic rate?
 I know that many different approaches can be applied to efficiently
use the available bandwidth, but if the BS is not able to provide the
 maximum sustained traffic rate for an ertPS connection whenever it is
 requested, is this implementation still compliant to the standard?

 Thanks,
 Juliana.
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