Re: WAP over SMS?

Hi Hans,

"Hanz Hager (ESF)" wrote:
> 
> Hi!
> 
> Even though it is expensive to WAP over SMS, there is one good reason for doing so.
> It might be a long shot, but still a little bit interesting for some special applications.
> 
> When you talk on the phone you can not simultaneously have a CSD session and on most GPRS phones you can not have data communication at the same time as you talk on the phone. Still, SMS is a bearer that works when you are on the phone. This means that a WAP push can come to the phone while you speak, but it also means that a user can use a WAP application while speaking on the phone. I guess this might be hard if the phone is held next to the ear, but you can use a hands-free equipment :-)

Yes, it would be nice if Kannel supports as many bearers and phones as
possible.
Does this mean that you can accept a call when the phone is performing a
WAP 
request ?

> 
> Now, having said that - can someone tell me if the job to make Kannel to support WAP over SMS is a big thing or if this is just not included because it has low support in the phones and at the operators?

It is quite big thing, but not bigger than for instance writing a new
SMSC driver ;)
> 
> If this is the case, maybe you can tell me where to start making the changes or help me to do it.
> 
> I have looked a little bit at it and in my view it looks like the only thing that needs to be done is to make a connection between the smsbox and that wapbox if there is an SMS with a special UDH (or whatever it is that designated the WAP over SMS message) and the package the reply to the WAP request in a return SMS message.

Yes, these are main things. Special UDH is a common way to mark a WAP
request.
There are a separate document for implementing WAP over SMPP, but I
think that we
should not use it (it defines so many headers that one wonders how many
bytes are
left for payload). 

Aarno