Re: [Openbts-discuss] Handover, re-invite etc

[Alexander C. <ale...@gm...>]

Exactly

On Wed, Jul 11, 2012 at 3:38 AM, Kurtis Heimerl
<khe...@cs...> wrote:
> I think callid/tag should do that job.
>
> On Tue, Jul 10, 2012 at 4:35 PM, Dmitri Soloviev <dm...@ma...> wrote:
>>
>>
>>
>> Wed, 11 Jul 2012 03:00:55 +0400 от Alexander Chemeris
>> <ale...@gm...>:
>>
>> Hi Dmitri,
>>
>> On Mon, Jul 9, 2012 at 7:17 PM, Dmitri Soloviev <dm...@ma...> wrote:
>>> May I suggest the following:
>>> - for negotiating between the old and the new sites, SIP will be used; (*)
>>> new method - HANDOVER; FROM field contains Handover Reference, TO - mobile
>>> id (IMSI for now).
>>
>> I strongly discourage you from introducing a new SIP message type
>> where an existing type could be used. INVITE should perfectly fit here
>> - you just need to add an additional header field. E.g. some other
>> implementations use "Handover" field.
>>
>> During ho procedure, old site will have 2 SIP dialogues with the same
>> CallId, To, From etc:
>> one to handle an active call, the second - for ho attempt
>> new method ("HANDOVER") could help differ them during ho setup and link them
>> when working as a "proxy" (when ho succeed)
>>
>>
>>
>>
>> Unrelated to a "Handover" field - you may find this this presentation
>> interesting:
>> http://mnet.cs.nthu.edu.tw/paper/945647zclin/060125.pdf
>>
>>
>> --
>> Regards,
>> Alexander Chemeris.
>> CEO, Fairwaves LLC / ООО УмРадио
>> http://fairwaves.ru
>>
>>
>>
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-- 
Regards,
Alexander Chemeris.
CEO, Fairwaves LLC / ООО УмРадио
http://fairwaves.ru