Re: [STDS-802-16] Fw: [STDS-802-16] PDU SN quick questions
Hi Elad,
1.
As far as my perception is concerned your assumption towards the first
question is right. Two cosecutive PDU's must have two consecutive sequence
numbers that's ofcourse its significance is.
If two consecutive PDUs are numbered
PDU SN x and PDU SN y, then
y=
((x+1)modulo 0xFF) incase
of PDU SN short and,
y=
((x+1)modulo 0xFFFF) incase
of PDU SN long.
2. My
perception towards your second question, In sec 11.13.35 of std 16e, it
is mentioned that a single connection can have more than one HARQ channels
(sub-burst), hence a single connection can have simultaneously operated
multiple Stop&Wait protocols running in (Not one) by which the sequencing
of the MAC PDU packets is not ensured. Hence extended SN is required in
MAC PDU and can't be wasteful.
Rgds,
P.Muthukumar
Sr.Software Engineer
Communication and Embedded Systems,
Larsen &Toubro Infotech,
Bangalore,INDIA
| Elad Eyal <Elad.eyal@COMSYSMOBILE.COM>
06/26/2006 07:11 PM
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Please respond to
Elad Eyal <Elad.eyal@COMSYSMOBILE.COM> |
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Subject
| [STDS-802-16] PDU SN quick questions |
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Hello
I'm in need of some clarifications regarding PDU SN.
1. Section 6.3.2.2.7.8 says that PDU SN "Specify the PDU sequence
number in a monotonic increasing manner." If two consecutive PDUs
are numbered PDU SN x and PDU SN y, is it OK to assume y=x+1, or only that
y>x ?
2. If an HARQ sub-burst holds several MAC PDUs and the connection has PDU
SN enabled, the PDU SN extended subheader is added to every PDU in the
sub-burst. Isn't this wasteful?
Thank you,
Elad Eyal
Software Architect
Comsys
Tel +972 (9) 9717895
Fax +972 (9) 9717887
elad.eyal@comsysmobile.com
www.comsysmobile.com
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