Hi Oliver,
On Tue, Feb 05, 2019 at 10:34:04AM +0100, Oliver Smith wrote:
On 1/14/19 3:03 AM, Neels Hofmeyr wrote:
I placed the draft in osmo-msc/doc/interMSC_HO_GSUP_msgs.txt on my branch neels/ho: http://git.osmocom.org/osmo-msc/tree/doc/interMSC_HO_GSUP_msgs.txt?h=neels/h...
In your draft, you describe the handover_number IE like this:
handover_number: (MSC-A <-- MSC-B, Handover Request Ack) extension: [Extension=0|NoExtension=1] (1 bit; should currently always be == 1) nature_of_nr: [GSM340_TYPE_NATIONAL|GSM340_TYPE_INTERNATIONAL|...] (3 bit) number_plan: GSM340_PLAN_ISDN (4 bit) msisdn: BCD
GSUP already has a msisdn IE:
https://git.osmocom.org/libosmocore/tree/include/osmocom/gsm/gsup.h?id=ae796... Can we use that, and simplify the handover_number to only have extension, nature_of_nr and number_plan?
I would argue we should introduce a new "global title" IE which contains * BCD digits * nature of address / type of number * numbering plan indicator
This would basically correspond to a SCCP global title, see osmo_sccp_gt in sccp_sap.h This is the most flexible way to encode any MSISDN, IMSI, ...
just my thoughts...