GSUP: E-interface messages for inter-MSC HO

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Oliver Smith osmith at sysmocom.de
Tue Feb 5 09:34:04 UTC 2019


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/ho

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=ae7966d145965452a325a33ca6334b6d6fe061a6#n244
Can we use that, and simplify the handover_number to only have
extension, nature_of_nr and number_plan?

Thanks,
Oliver

-- 
- Oliver Smith <osmith at sysmocom.de>            https://www.sysmocom.de/
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