Nordin -
You will probably find GSM 04.07 Appendix B of some use here. Specifically, for a description of the padding sequence and the meaning of "H" and "L" see GSM 04.07 B.1.2.2.
-- David
On Jun 18, 2009, at 9:12 AM, Nordin wrote:
Well guys,
If someone can help me with how to fill in the Rest Octets, I'll send you a postcard from my city to thank you :) What I found out is that it uses CSN.1 notation, but the description is hard to follow, I began to see words floating around the screen.
<SI3RestOctet>::=<Optionalselectionparameters> <OptionalPoweroffset> <SystemInformation2terIndicator> <EarlyClassmarkSendingControl> <Schedulingifandwhere> {L|H<GPRSIndicator>} <sparepadding>:
<OptionalSelectionParameters>::= L |H <SelectionParameters>;
<SelectionParameters>::= CBQ:bit(1) <CELL_RESELECT_OFFSET:bit(6)> <TEMPORARY_OFFSET:bit(3)> <PENALTY_TIME:bit(5)>;
<OptionalPowerOffset>::= L |H <PowerOffset:bit(2)
;<SystemInformation2terIndicator>::=
L|H;<EarlyClassmarkSendingControl>::= L|H;
<Schedulingifandwhere>::= L|H WHERE:bit(3);
<GPRSIndicator>::= <RACOLOUR :bit(3)> < SI13POSITION :bit>;
So, now I want to enable GPRS support by do something with GPRSIndicator. This is how I thought to do that: L|H -> 1 next -> RACOLOUR -> 000 next -> SI13POSITION -> 0 So we get -> 1 000 0
Next step is to do something with padding but than I'm lost. I don't have good documentations on how to use CSN.1 for GSM network.
David A. Burgess Kestrel Signal Processing, Inc.