Re: [Openbts-discuss] Handover in OpenBTS

[Dmitri S. <ds...@fl...>]

*Dmitri Soloviev*, PhD


Chief Technology Officer

www.flexatel.com
ds...@fl...
Office: +1 650 964-1101
Fax: +1 650 964-3353
Mobile: +7 925 838-5193
Skype: dmisol

On Tue, May 31, 2016 at 4:19 PM, Meny Sidar <sid...@gm...> wrote:

> Hello again guys- two small follow up question:
> -is it possible to perform handover from 3G to 2G? (in our case- to force
> cellulars to connect to OpenBTS GSM network)
>
Sure. From signaling perspective - I'm talking about BSSAP. Thus, it should
be reflected at Um as well. I would recommend to visit etsi.org - you'll
find all specs available for download, for free

> -is there a comfortable way to detect ARFCN of nearby phones using SDR?
> without checking the phone itself.
>
Measuring signal level is not enough. You need to decode C0 - act as a
handset..


>
> Thanks!
> Meny
>
>
> 2016-05-21 22:35 GMT+03:00 Meny Sidar <sid...@gm...>:
>
>> Thank you very much for your comments!
>> I will try this in the next few days.
>>
>> Meny
>> On 21 May 2016 22:27, "Dmitri Soloviev" <ds...@fl...> wrote:
>>
>>> sorry, a slip of keayboard - CELL ID must be different!
>>>
>>> *Dmitri Soloviev*, PhD
>>>
>>>
>>> Chief Technology Officer
>>>
>>> www.flexatel.com
>>> ds...@fl...
>>> Office: +1 650 964-1101
>>> Fax: +1 650 964-3353
>>> Mobile: +7 925 838-5193
>>> Skype: dmisol
>>>
>>> On Sat, May 21, 2016 at 10:26 PM, Dmitri Soloviev <ds...@fl...>
>>> wrote:
>>>
>>>> Hi
>>>>
>>>> Let me extend it:
>>>> - neighbour ARFCN list
>>>> - system-level support: by the end of the day, HO command should be
>>>> fired to a handset, and the target ARFCN should detect HO access from a
>>>> mobile (RACH-like burst with single-byte HO identifier at desired timeslot)
>>>> - in general, LAC can be the same - in "grown up" systems it identifies
>>>> paging area, thus a place for LU when changed. CELL ID must be the same,
>>>> for sure
>>>>
>>>> This page is outdated now, but GSM remains..
>>>> https://wush.net/trac/rangepublic/wiki/Handover
>>>>
>>>>
>>>> Rgds,
>>>>
>>>> *Dmitri Soloviev*, PhD
>>>>
>>>>
>>>> Chief Technology Officer
>>>>
>>>> www.flexatel.com
>>>> ds...@fl...
>>>> Office: +1 650 964-1101
>>>> Fax: +1 650 964-3353
>>>> Mobile: +7 925 838-5193
>>>> Skype: dmisol
>>>>
>>>> On Sat, May 21, 2016 at 8:36 AM, Max Parker <pr...@gm...> wrote:
>>>>
>>>>> Hi
>>>>> you should set up the next parameters:
>>>>> - GSM band, C0 (arfcn) , MNC and MCC must be the same to the legit
>>>>> network
>>>>> - LAC must be different.
>>>>> - your network must be more powerful
>>>>> good luck
>>>>>
>>>>> --
>>>>> Sincerely,
>>>>>
>>>>> Max Parker
>>>>> +972 52-587-1009
>>>>>
>>>>> > On 17 May 2016, at 11:15, Meny Sidar <sid...@gm...> wrote:
>>>>> >
>>>>> > Hi guys,
>>>>> >
>>>>> > I want to try and perform handover from a phone which is registered
>>>>> to a "legit" network to my BTS network.
>>>>> > Is it possible to make that forced handover in OpenBTS software?
>>>>> > if it is, could you help me get it started?
>>>>> > found a lot of material online, mostly theoretical. couldn't really
>>>>> do anything myself..
>>>>> >
>>>>> > Have to point out that this is just for research purposes for my
>>>>> university,
>>>>> > nothing illegal...
>>>>> >
>>>>> > Thanks a lot!
>>>>> > Meny Sidar
>>>>> >
>>>>> ------------------------------------------------------------------------------
>>>>> > Mobile security can be enabling, not merely restricting. Employees
>>>>> who
>>>>> > bring their own devices (BYOD) to work are irked by the imposition
>>>>> of MDM
>>>>> > restrictions. Mobile Device Manager Plus allows you to control only
>>>>> the
>>>>> > apps on BYO-devices by containerizing them, leaving personal data
>>>>> untouched!
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>>>>> > _______________________________________________
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>>>>>
>>>>>
>>>>> ------------------------------------------------------------------------------
>>>>> Mobile security can be enabling, not merely restricting. Employees who
>>>>> bring their own devices (BYOD) to work are irked by the imposition of
>>>>> MDM
>>>>> restrictions. Mobile Device Manager Plus allows you to control only the
>>>>> apps on BYO-devices by containerizing them, leaving personal data
>>>>> untouched!
>>>>> https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
>>>>> _______________________________________________
>>>>> Openbts-discuss mailing list
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>>>>>
>>>>
>>>>
>>>
>