CDMA SIM atom

CDMA SIM atom

[Aygon, Bertrand]

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Hi,

We are working on CDMA to enable some USB dongle, and we need to get the IMSI for the ConnMan interface, to create the interface name.

We could use the AT SIM atom, since there should be no big difference between a CDMA SIM and a GSM SIM (same kind of functionality for SIM lock/unlock, same IMSI info).

But we could also create a CDMA dedicated one. This will duplicate some code, but will be 'cleaner'.

I would prefer the solution of a CDMA SIM atom, so CDMA plugins use only CDMA atom, but I would prefer to have the oFono community opinion before going into the code.

Thanks,

Bertrand


--
Bertrand Aygon                      Engineering Manager
Bertrand.Aygon(a)Intel.com<mailto:Bertrand.Aygon@intel.com>            Open Source Technology Center, Intel Corporation

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Re: CDMA SIM atom

[Marcel Holtmann]

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Hi Bertrand,

> We are working on CDMA to enable some USB dongle, and we need to get the IMSI for the ConnMan interface, to create the interface name.
> 
> We could use the AT SIM atom, since there should be no big difference between a CDMA SIM and a GSM SIM (same kind of functionality for SIM lock/unlock, same IMSI info).
> 
> But we could also create a CDMA dedicated one. This will duplicate some code, but will be 'cleaner'.
> 
> I would prefer the solution of a CDMA SIM atom, so CDMA plugins use only CDMA atom, but I would prefer to have the oFono community opinion before going into the code.

you do not need an IMSI for ConnMan. You just need a proper unique
identifier that is consistent. Using the hardware serial number in case
of CDMA should be a good enough interim solution.

We are using the IMSI for GSM since we wanna bind stored settings
towards the SIM card. So that hardware swapping has no effect on the
user experience. With CDMA we could neglect this actually. So far all
CDMA account are still bound to the hardware itself.

Regards

Marcel

RE: CDMA SIM atom

[Aygon, Bertrand]

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Hi,

> > We are working on CDMA to enable some USB dongle, and we need to get the
> IMSI for the ConnMan interface, to create the interface name.
> >
> > We could use the AT SIM atom, since there should be no big difference
> between a CDMA SIM and a GSM SIM (same kind of functionality for SIM
> lock/unlock, same IMSI info).
> >
> > But we could also create a CDMA dedicated one. This will duplicate some
> code, but will be 'cleaner'.
> >
> > I would prefer the solution of a CDMA SIM atom, so CDMA plugins use only
> CDMA atom, but I would prefer to have the oFono community opinion before going
> into the code.
> 
> you do not need an IMSI for ConnMan. You just need a proper unique
> identifier that is consistent. Using the hardware serial number in case
> of CDMA should be a good enough interim solution.

The user can change its SIM card and put it in another dongle

> We are using the IMSI for GSM since we wanna bind stored settings
> towards the SIM card. So that hardware swapping has no effect on the
> user experience.

This is exactly what we also want to do with CDMA dongle.
 
> With CDMA we could neglect this actually. So far all
> CDMA account are still bound to the hardware itself.

Why do you want to neglect this?

We should be consistent have have the same behaviour for this. If someone unplug and replug its dongle, he do not want to re-insert the data call parameter, as with a GSM dongle.

And what about PIN?

Regards,

Bertrand
---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
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Re: CDMA SIM atom

[Denis Kenzior]

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Hi Bertrand,

On 07/25/2011 10:03 AM, Aygon, Bertrand wrote:
> Hi,
> 
>>> We are working on CDMA to enable some USB dongle, and we need to get the
>> IMSI for the ConnMan interface, to create the interface name.
>>>
>>> We could use the AT SIM atom, since there should be no big difference
>> between a CDMA SIM and a GSM SIM (same kind of functionality for SIM
>> lock/unlock, same IMSI info).
>>>
>>> But we could also create a CDMA dedicated one. This will duplicate some
>> code, but will be 'cleaner'.
>>>
>>> I would prefer the solution of a CDMA SIM atom, so CDMA plugins use only
>> CDMA atom, but I would prefer to have the oFono community opinion before going
>> into the code.
>>
>> you do not need an IMSI for ConnMan. You just need a proper unique
>> identifier that is consistent. Using the hardware serial number in case
>> of CDMA should be a good enough interim solution.
> 
> The user can change its SIM card and put it in another dongle
> 

There are plenty of CDMA devices which have no SIM card.

>> We are using the IMSI for GSM since we wanna bind stored settings
>> towards the SIM card. So that hardware swapping has no effect on the
>> user experience.
> 
> This is exactly what we also want to do with CDMA dongle.
>  

Then create a cdma-sim atom that does this and enable it on those
dongles that do have a SIM card.

>> With CDMA we could neglect this actually. So far all
>> CDMA account are still bound to the hardware itself.
> 
> Why do you want to neglect this?

Because right now this is not the highest priority and you still need to
figure out how to make the connman plugin handle cases with and without
a sim atom.

> 
> We should be consistent have have the same behaviour for this. If someone unplug and replug its dongle, he do not want to re-insert the data call parameter, as with a GSM dongle.
> 

Sure, but remember to start small (and working) and build up.

> And what about PIN?
> 

Regards,
-Denis

RE: CDMA SIM atom

[Marcel Holtmann]

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Hi Bertrand,

> > > We are working on CDMA to enable some USB dongle, and we need to get the
> > IMSI for the ConnMan interface, to create the interface name.
> > >
> > > We could use the AT SIM atom, since there should be no big difference
> > between a CDMA SIM and a GSM SIM (same kind of functionality for SIM
> > lock/unlock, same IMSI info).
> > >
> > > But we could also create a CDMA dedicated one. This will duplicate some
> > code, but will be 'cleaner'.
> > >
> > > I would prefer the solution of a CDMA SIM atom, so CDMA plugins use only
> > CDMA atom, but I would prefer to have the oFono community opinion before going
> > into the code.
> > 
> > you do not need an IMSI for ConnMan. You just need a proper unique
> > identifier that is consistent. Using the hardware serial number in case
> > of CDMA should be a good enough interim solution.
> 
> The user can change its SIM card and put it in another dongle
> 
> > We are using the IMSI for GSM since we wanna bind stored settings
> > towards the SIM card. So that hardware swapping has no effect on the
> > user experience.
> 
> This is exactly what we also want to do with CDMA dongle.

I know CDMA dongles in theory have a SIM card, but not in practice. Or
are you telling me the CDMA dongles you have, have SIM cards? And these
SIM cards are used for anything?
 
> > With CDMA we could neglect this actually. So far all
> > CDMA account are still bound to the hardware itself.
> 
> Why do you want to neglect this?
> 
> We should be consistent have have the same behaviour for this. If someone unplug and replug its dongle, he do not want to re-insert the data call parameter, as with a GSM dongle.

I still don't believe that any CDMA operator so far really uses SIM
cards. I heard about some cases with Verizon where they have CDMA + LTE
in deployment.

> And what about PIN?

Good question. It is not a SIM PIN, it is a hardware PIN in the first
place. And only if you have a SIM, you have SIM PIN.

So the same question stays, where is your SIM card in CDMA hardware that
you have right now?

Regards

Marcel

RE: CDMA SIM atom

[Aygon, Bertrand]

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Hi,

> > > > We are working on CDMA to enable some USB dongle, and we need to get the
> > > IMSI for the ConnMan interface, to create the interface name.
> > > >
> > > > We could use the AT SIM atom, since there should be no big difference
> > > between a CDMA SIM and a GSM SIM (same kind of functionality for SIM
> > > lock/unlock, same IMSI info).
> > > >
> > > > But we could also create a CDMA dedicated one. This will duplicate some
> > > code, but will be 'cleaner'.
> > > >
> > > > I would prefer the solution of a CDMA SIM atom, so CDMA plugins use only
> > > CDMA atom, but I would prefer to have the oFono community opinion before
> going
> > > into the code.
> > >
> > > you do not need an IMSI for ConnMan. You just need a proper unique
> > > identifier that is consistent. Using the hardware serial number in case
> > > of CDMA should be a good enough interim solution.
> >
> > The user can change its SIM card and put it in another dongle
> >
> > > We are using the IMSI for GSM since we wanna bind stored settings
> > > towards the SIM card. So that hardware swapping has no effect on the
> > > user experience.
> >
> > This is exactly what we also want to do with CDMA dongle.
> 
> I know CDMA dongles in theory have a SIM card, but not in practice. Or
> are you telling me the CDMA dongles you have, have SIM cards? And these
> SIM cards are used for anything?

The SpeedUp 7300 EVDA has a SIM card.
And I also got a Huawei CDMA dongle with SIM card, but I do not remember the model, I will give it to you later.

> > > With CDMA we could neglect this actually. So far all
> > > CDMA account are still bound to the hardware itself.
> >
> > Why do you want to neglect this?
> >
> > We should be consistent have have the same behaviour for this. If someone
> unplug and replug its dongle, he do not want to re-insert the data call
> parameter, as with a GSM dongle.
> 
> I still don't believe that any CDMA operator so far really uses SIM
> cards. I heard about some cases with Verizon where they have CDMA + LTE
> in deployment.

The SpeedUp 7300 cannot register to the network without the SIM, and so make a data call.

We can retrieve the IMSI on this dongle, the AT+CIMI command works correctly.

I don't know if they are using it for anything else.

And SpeedUp AT spec for this dongle show CPIN command, but I do not have try them.

> 
> > And what about PIN?
> 
> Good question. It is not a SIM PIN, it is a hardware PIN in the first
> place. And only if you have a SIM, you have SIM PIN.

I do not have test this, but I will do this asap.

> So the same question stays, where is your SIM card in CDMA hardware that
> you have right now?

I will send you some picture of those dongle and SIM card.

Regards,

Bertrand
---------------------------------------------------------------------
Intel Corporation SAS (French simplified joint stock company)
Registered headquarters: "Les Montalets"- 2, rue de Paris, 
92196 Meudon Cedex, France
Registration Number:  302 456 199 R.C.S. NANTERRE
Capital: 4,572,000 Euros

This e-mail and any attachments may contain confidential material for
the sole use of the intended recipient(s). Any review or distribution
by others is strictly prohibited. If you are not the intended
recipient, please contact the sender and delete all copies.

RE: CDMA SIM atom

[Marcel Holtmann]

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Hi Bertrand,

> > > > > We are working on CDMA to enable some USB dongle, and we need to get the
> > > > IMSI for the ConnMan interface, to create the interface name.
> > > > >
> > > > > We could use the AT SIM atom, since there should be no big difference
> > > > between a CDMA SIM and a GSM SIM (same kind of functionality for SIM
> > > > lock/unlock, same IMSI info).
> > > > >
> > > > > But we could also create a CDMA dedicated one. This will duplicate some
> > > > code, but will be 'cleaner'.
> > > > >
> > > > > I would prefer the solution of a CDMA SIM atom, so CDMA plugins use only
> > > > CDMA atom, but I would prefer to have the oFono community opinion before
> > going
> > > > into the code.
> > > >
> > > > you do not need an IMSI for ConnMan. You just need a proper unique
> > > > identifier that is consistent. Using the hardware serial number in case
> > > > of CDMA should be a good enough interim solution.
> > >
> > > The user can change its SIM card and put it in another dongle
> > >
> > > > We are using the IMSI for GSM since we wanna bind stored settings
> > > > towards the SIM card. So that hardware swapping has no effect on the
> > > > user experience.
> > >
> > > This is exactly what we also want to do with CDMA dongle.
> > 
> > I know CDMA dongles in theory have a SIM card, but not in practice. Or
> > are you telling me the CDMA dongles you have, have SIM cards? And these
> > SIM cards are used for anything?
> 
> The SpeedUp 7300 EVDA has a SIM card.
> And I also got a Huawei CDMA dongle with SIM card, but I do not remember the model, I will give it to you later.

are these SIM cards used for the subscriber identity. Meaning that if
you swap one dongle with the other one, it it still the same account?

> > > > With CDMA we could neglect this actually. So far all
> > > > CDMA account are still bound to the hardware itself.
> > >
> > > Why do you want to neglect this?
> > >
> > > We should be consistent have have the same behaviour for this. If someone
> > unplug and replug its dongle, he do not want to re-insert the data call
> > parameter, as with a GSM dongle.
> > 
> > I still don't believe that any CDMA operator so far really uses SIM
> > cards. I heard about some cases with Verizon where they have CDMA + LTE
> > in deployment.
> 
> The SpeedUp 7300 cannot register to the network without the SIM, and so make a data call.
> 
> We can retrieve the IMSI on this dongle, the AT+CIMI command works correctly.
> 
> I don't know if they are using it for anything else.
> 
> And SpeedUp AT spec for this dongle show CPIN command, but I do not have try them.

Seems like in Asia they are actually using the SIM card for your network
account. Compared to the US this is different. There the hardware ID is
used for network access.

> > > And what about PIN?
> > 
> > Good question. It is not a SIM PIN, it is a hardware PIN in the first
> > place. And only if you have a SIM, you have SIM PIN.
> 
> I do not have test this, but I will do this asap.
> 
> > So the same question stays, where is your SIM card in CDMA hardware that
> > you have right now?
> 
> I will send you some picture of those dongle and SIM card.

How close are these CDMA SIM cards to GSM SIM cards. Do they support EF
or other SIM specific details?

Regards

Marcel