Re: [v6ops] I-D Action: draft-ietf-v6ops-ipv6-roaming-analysis-02.txt

[GangChen <[e-mail]>]

2014-08-07 15:37 GMT+08:00, Tore Anderson <[e-mail]>:
> * GangChen
>
>> In your case, I guess traffic is home routed. When a Telenor customer
>> roams Tele2/NwN, All PDP/PDN request and traffic will back to Telenor
>> network. Therefore, it works.
>
> Yep, exactly. I am assigned addresses from Telenor's prefixes when I
> roam (both for IPv4 and IPv6 APNs). Same thing for Tele2/NwN.
>
>> However, it increases the international data roaming fees to
>> customers, since Telenor has to pay GRX/IPX carrier for the
>> international traffic transit. In order to reduce the cost, local
>> breakout is an optimized approach.
>
> I don't think any of the Norwegian providers allow/support their
> subscribers to do local breakout. I assume this is a service the visited
> network cannot offer to the roamer without the home network's blessing?

It's a business matter more than technical concern. Most operators
adopt home routed because it facilitates charging. GGSN/PGW in the
home land could get precise traffic volume a customer generates. Other
consideration is for lawful interception.


> [ If the visited network can do this without the home network's
> blessing, that would have made for a extremely nice product for
> travelers. Imagine if I could just have entered a new APN name
> "internet.gangchen" when I visit your country and roam in your PLMN,
> punch in my credit card details in a captive portal and from then on
> been able to use mobile internet at reasonable local rates... No more
> bothering with getting pre-paid data SIMs from local providers and such
> anymore..! ]

That is exact experience EU-Roaming-III would like to achieve.

>> It will save the charge for
>> GRX/IPX transit and improve data service performance.
>
> I think Telenor (and all the other providers around here for that
> matter) are happily enjoying near-criminal profit margins on those
> expenses, so I'm kind of doubting I'll see local breakout being offered
> or encouraged anytime soon...but I guess time will tell.

Voice traffic based on IMS does local breakout mode as per GSMA
regulation. For the data service, China Mobile adopts local breakout
mode when customers perform Intra-PLMN mobility(more detailed is
described in section 2 of the draft). There is also ongoing effort to
promote local breakout for data roaming in Asian area. Anyway, that is
the topic mainly regarding to business perspective.

Gang



> Tore
>