openbts-discuss

[Openbts-discuss] Noob Question about multiple ARFCN

[Arthur R. <art...@gm...>]

Hi,

I am wondering why we can't have multiple ARFCN (contiguous or not) with a
single TRX.
OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for example is
supported but not B200)
I do not know how opencell systems works for multiple arfcns but I can only
assume that there are multiple trx inside ?

This question may have been answered before; if so, I will have poorly
searched.

Thanks !

Re: [Openbts-discuss] Noob Question about multiple ARFCN

[Michael I. <mic...@ra...>]

Hi Arthur,

Not a silly question, I’m not sure it’s explained anywhere prominently.

The OpenCell systems have Range Networks SDRs in them. The transceiver software for that SDR supports multiple ARFCNs using a single physical radio. The transceiver software for UHD based hardware does not yet support multiple ARFCNs.

Regards,
-Michael

> On Dec 18, 2014, at 10:37 AM, Arthur Rabaté <art...@gm...> wrote:
> 
> Hi,
> 
> I am wondering why we can't have multiple ARFCN (contiguous or not) with a single TRX.
> OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for example is supported but not B200)
> I do not know how opencell systems works for multiple arfcns but I can only assume that there are multiple trx inside ?
> 
> This question may have been answered before; if so, I will have poorly searched.
> 
> Thanks !
> ------------------------------------------------------------------------------
> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
> from Actuate! Instantly Supercharge Your Business Reports and Dashboards
> with Interactivity, Sharing, Native Excel Exports, App Integration & more
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Re: [Openbts-discuss] Noob Question about multiple ARFCN

[Michael I. <mic...@ra...>]

(please always use “reply all” so the list is included)

Technically, yes it is possible. There is the question of priorities, effort and time as with any software project. :)



> On Dec 18, 2014, at 11:14 AM, Arthur Rabaté <art...@gm...> wrote:
> 
> It is clearer now !
> 
> So, this might be feasible in a future version of UHD ?
> 
> Regards,
> 
> Arthur
> 
> Le Thu Dec 18 2014 at 11:10:02, Michael Iedema <mic...@ra...> a écrit :
> Hi Arthur,
> 
> Not a silly question, I’m not sure it’s explained anywhere prominently.
> 
> The OpenCell systems have Range Networks SDRs in them. The transceiver software for that SDR supports multiple ARFCNs using a single physical radio. The transceiver software for UHD based hardware does not yet support multiple ARFCNs.
> 
> Regards,
> -Michael
> 
> > On Dec 18, 2014, at 10:37 AM, Arthur Rabaté <art...@gm...> wrote:
> >
> > Hi,
> >
> > I am wondering why we can't have multiple ARFCN (contiguous or not) with a single TRX.
> > OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for example is supported but not B200)
> > I do not know how opencell systems works for multiple arfcns but I can only assume that there are multiple trx inside ?
> >
> > This question may have been answered before; if so, I will have poorly searched.
> >
> > Thanks !
> > ------------------------------------------------------------------------------
> > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
> > from Actuate! Instantly Supercharge Your Business Reports and Dashboards
> > with Interactivity, Sharing, Native Excel Exports, App Integration & more
> > Get technology previously reserved for billion-dollar corporations, FREE
> > http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk_______________________________________________
> > Openbts-discuss mailing list
> > Ope...@li...
> > https://lists.sourceforge.net/lists/listinfo/openbts-discuss
> 

Re: [Openbts-discuss] Noob Question about multiple ARFCN

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

For the sake of conversation, OsmoTRX does support multiple ARFCN with UHD
and even more features are coming.

Thomas Tsou should be able to comment on how to enable it in OsmoTRX.

Please excuse typos. Written with a touchscreen keyboard.

--
Regards,
Alexander Chemeris
CEO Fairwaves, Inc.
https://fairwaves.co
On Dec 18, 2014 1:24 PM, "Michael Iedema" <mic...@ra...>
wrote:

> (please always use “reply all” so the list is included)
>
> Technically, yes it is possible. There is the question of priorities,
> effort and time as with any software project. :)
>
>
>
> > On Dec 18, 2014, at 11:14 AM, Arthur Rabaté <art...@gm...>
> wrote:
> >
> > It is clearer now !
> >
> > So, this might be feasible in a future version of UHD ?
> >
> > Regards,
> >
> > Arthur
> >
> > Le Thu Dec 18 2014 at 11:10:02, Michael Iedema <
> mic...@ra...> a écrit :
> > Hi Arthur,
> >
> > Not a silly question, I’m not sure it’s explained anywhere prominently.
> >
> > The OpenCell systems have Range Networks SDRs in them. The transceiver
> software for that SDR supports multiple ARFCNs using a single physical
> radio. The transceiver software for UHD based hardware does not yet support
> multiple ARFCNs.
> >
> > Regards,
> > -Michael
> >
> > > On Dec 18, 2014, at 10:37 AM, Arthur Rabaté <art...@gm...>
> wrote:
> > >
> > > Hi,
> > >
> > > I am wondering why we can't have multiple ARFCN (contiguous or not)
> with a single TRX.
> > > OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for
> example is supported but not B200)
> > > I do not know how opencell systems works for multiple arfcns but I can
> only assume that there are multiple trx inside ?
> > >
> > > This question may have been answered before; if so, I will have poorly
> searched.
> > >
> > > Thanks !
> > >
> ------------------------------------------------------------------------------
> > > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
> > > from Actuate! Instantly Supercharge Your Business Reports and
> Dashboards
> > > with Interactivity, Sharing, Native Excel Exports, App Integration &
> more
> > > Get technology previously reserved for billion-dollar corporations,
> FREE
> > >
> http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk_______________________________________________
> > > Openbts-discuss mailing list
> > > Ope...@li...
> > > https://lists.sourceforge.net/lists/listinfo/openbts-discuss
> >
>
>
> ------------------------------------------------------------------------------
> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
> from Actuate! Instantly Supercharge Your Business Reports and Dashboards
> with Interactivity, Sharing, Native Excel Exports, App Integration & more
> Get technology previously reserved for billion-dollar corporations, FREE
>
> http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk
> _______________________________________________
> Openbts-discuss mailing list
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> https://lists.sourceforge.net/lists/listinfo/openbts-discuss
>

Re: [Openbts-discuss] Noob Question about multiple ARFCN

[Arthur R. <art...@gm...>]

Hi Alexander,

About the multiple arfcns osmotrx support with UHD.

So far the only thing I have seen is dual channelling with UmTRX or B210,
but there does not seem to be any support of multiples arfcns on a single
trx (can't put more than one trx on a B200).

Is there a branch of the osmotrx-dev I have not seen ?

Kind Regards,

Arthur

Le Thu Dec 18 2014 at 12:09:32, Alexander Chemeris <
ale...@gm...> a écrit :

> For the sake of conversation, OsmoTRX does support multiple ARFCN with UHD
> and even more features are coming.
>
> Thomas Tsou should be able to comment on how to enable it in OsmoTRX.
>
> Please excuse typos. Written with a touchscreen keyboard.
>
> --
> Regards,
> Alexander Chemeris
> CEO Fairwaves, Inc.
> https://fairwaves.co
> On Dec 18, 2014 1:24 PM, "Michael Iedema" <
> mic...@ra...> wrote:
>
>> (please always use “reply all” so the list is included)
>>
>> Technically, yes it is possible. There is the question of priorities,
>> effort and time as with any software project. :)
>>
>>
>>
>> > On Dec 18, 2014, at 11:14 AM, Arthur Rabaté <art...@gm...>
>> wrote:
>> >
>> > It is clearer now !
>> >
>> > So, this might be feasible in a future version of UHD ?
>> >
>> > Regards,
>> >
>> > Arthur
>> >
>> > Le Thu Dec 18 2014 at 11:10:02, Michael Iedema <
>> mic...@ra...> a écrit :
>> > Hi Arthur,
>> >
>> > Not a silly question, I’m not sure it’s explained anywhere prominently.
>> >
>> > The OpenCell systems have Range Networks SDRs in them. The transceiver
>> software for that SDR supports multiple ARFCNs using a single physical
>> radio. The transceiver software for UHD based hardware does not yet support
>> multiple ARFCNs.
>> >
>> > Regards,
>> > -Michael
>> >
>> > > On Dec 18, 2014, at 10:37 AM, Arthur Rabaté <art...@gm...>
>> wrote:
>> > >
>> > > Hi,
>> > >
>> > > I am wondering why we can't have multiple ARFCN (contiguous or not)
>> with a single TRX.
>> > > OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for
>> example is supported but not B200)
>> > > I do not know how opencell systems works for multiple arfcns but I
>> can only assume that there are multiple trx inside ?
>> > >
>> > > This question may have been answered before; if so, I will have
>> poorly searched.
>> > >
>> > > Thanks !
>> > >
>> ------------------------------------------------------------------------------
>> > > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
>> > > from Actuate! Instantly Supercharge Your Business Reports and
>> Dashboards
>> > > with Interactivity, Sharing, Native Excel Exports, App Integration &
>> more
>> > > Get technology previously reserved for billion-dollar corporations,
>> FREE
>> > >
>> http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk_______________________________________________
>> > > Openbts-discuss mailing list
>> > > Ope...@li...
>> > > https://lists.sourceforge.net/lists/listinfo/openbts-discuss
>> >
>>
>>
>> ------------------------------------------------------------------------------
>> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
>> from Actuate! Instantly Supercharge Your Business Reports and Dashboards
>> with Interactivity, Sharing, Native Excel Exports, App Integration & more
>> Get technology previously reserved for billion-dollar corporations, FREE
>>
>> http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk
>> _______________________________________________
>> Openbts-discuss mailing list
>> Ope...@li...
>> https://lists.sourceforge.net/lists/listinfo/openbts-discuss
>>
>

Re: [Openbts-discuss] Noob Question about multiple ARFCN

[Tom T. <to...@ts...>]

On Fri, Feb 20, 2015 at 2:22 PM, Arthur Rabaté <art...@gm...> wrote:
> About the multiple arfcns osmotrx support with UHD.
>
> So far the only thing I have seen is dual channelling with UmTRX or B210,
> but there does not seem to be any support of multiples arfcns on a single
> trx (can't put more than one trx on a B200).

Multi-ARFCN was implemented for UHD devices - multiple implementations
actually - but never merged into mainline OsmoTRX or OpenBTS. The main
reason was that most of the interest in increased channel capacity
shifted toward dual-channel devices.

The multi-ARFCN code needs to be brought up to speed with more recent
updates. That work is planned, but probably won't be ready for testing
for a number of months.

  -TT

Re: [Openbts-discuss] Noob Question about multiple ARFCN

[Ralph A. S. d. <ra...@sc...>]

Keep in mind that multi ARFCN does not require multiple transceivers. You can create different carriers within the bandwidth (sampling rate!) of a SDR.

 

Ralph.

 

From: Arthur Rabaté [mailto:art...@gm...] 
Sent: Friday, February 20, 2015 23:22
To: Alexander Chemeris; Michael Iedema
Cc: ope...@li...
Subject: Re: [Openbts-discuss] Noob Question about multiple ARFCN

 

Hi Alexander,

About the multiple arfcns osmotrx support with UHD.

 

So far the only thing I have seen is dual channelling with UmTRX or B210, but there does not seem to be any support of multiples arfcns on a single trx (can't put more than one trx on a B200).

 

Is there a branch of the osmotrx-dev I have not seen ?

 

Kind Regards,

 

Arthur

 

Le Thu Dec 18 2014 at 12:09:32, Alexander Chemeris <ale...@gm...> a écrit :

For the sake of conversation, OsmoTRX does support multiple ARFCN with UHD and even more features are coming.

Thomas Tsou should be able to comment on how to enable it in OsmoTRX.

Please excuse typos. Written with a touchscreen keyboard.

--
Regards,
Alexander Chemeris
CEO Fairwaves, Inc.
https://fairwaves.co

On Dec 18, 2014 1:24 PM, "Michael Iedema" <mic...@ra...> wrote:

(please always use “reply all” so the list is included)

Technically, yes it is possible. There is the question of priorities, effort and time as with any software project. :)



> On Dec 18, 2014, at 11:14 AM, Arthur Rabaté <art...@gm...> wrote:
>
> It is clearer now !
>
> So, this might be feasible in a future version of UHD ?
>
> Regards,
>
> Arthur
>
> Le Thu Dec 18 2014 at 11:10:02, Michael Iedema <mic...@ra...> a écrit :
> Hi Arthur,
>
> Not a silly question, I’m not sure it’s explained anywhere prominently.
>
> The OpenCell systems have Range Networks SDRs in them. The transceiver software for that SDR supports multiple ARFCNs using a single physical radio. The transceiver software for UHD based hardware does not yet support multiple ARFCNs.
>
> Regards,
> -Michael
>
> > On Dec 18, 2014, at 10:37 AM, Arthur Rabaté <art...@gm...> wrote:
> >
> > Hi,
> >
> > I am wondering why we can't have multiple ARFCN (contiguous or not) with a single TRX.
> > OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for example is supported but not B200)
> > I do not know how opencell systems works for multiple arfcns but I can only assume that there are multiple trx inside ?
> >
> > This question may have been answered before; if so, I will have poorly searched.
> >
> > Thanks !
> > ------------------------------------------------------------------------------
> > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
> > from Actuate! Instantly Supercharge Your Business Reports and Dashboards
> > with Interactivity, Sharing, Native Excel Exports, App Integration & more
> > Get technology previously reserved for billion-dollar corporations, FREE
> > http://pubads.g.doubleclick.net/gampad/clk?id=164703151 <http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk_______________________________________________> &iu=/4140/ostg.clktrk_______________________________________________
> > Openbts-discuss mailing list
> > Ope...@li...
> > https://lists.sourceforge.net/lists/listinfo/openbts-discuss
>

------------------------------------------------------------------------------
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with Interactivity, Sharing, Native Excel Exports, App Integration & more
Get technology previously reserved for billion-dollar corporations, FREE
http://pubads.g.doubleclick.net/gampad/clk?id=164703151 <http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk> &iu=/4140/ostg.clktrk
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Re: [Openbts-discuss] Noob Question about multiple ARFCN

[Dmitri S. <dm...@ma...>]

 Hi Michael, Arthur

It had been a branch of OpenBTS with multi-ARFCN support for UHD. 

I've used the mentioned transceiver software (and even patched it to detect RACH burst for handover) couple of years ago, with UmTRX hardware, when implementing alternative handover for OpenBTS. 

Please google - unfortunately I'm using another notebook, without any traces of mentioned activities. Sorry


Rgds,
Dmitri


Thu, 18 Dec 2014 10:09:59 +0000 от Michael Iedema <mic...@ra...>:
>Hi Arthur,
>
>Not a silly question, I’m not sure it’s explained anywhere prominently.
>
>The OpenCell systems have Range Networks SDRs in them. The transceiver software for that SDR supports multiple ARFCNs using a single physical radio. The transceiver software for UHD based hardware does not yet support multiple ARFCNs.
>
>Regards,
>-Michael
>
>> On Dec 18, 2014, at 10:37 AM, Arthur Rabaté < art...@gm... > wrote:
>> 
>> Hi,
>> 
>> I am wondering why we can't have multiple ARFCN (contiguous or not) with a single TRX.
>> OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for example is supported but not B200)
>> I do not know how opencell systems works for multiple arfcns but I can only assume that there are multiple trx inside ?
>> 
>> This question may have been answered before; if so, I will have poorly searched.
>> 
>> Thanks !
>> ------------------------------------------------------------------------------
>> Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
>> from Actuate! Instantly Supercharge Your Business Reports and Dashboards
>> with Interactivity, Sharing, Native Excel Exports, App Integration & more
>> Get technology previously reserved for billion-dollar corporations, FREE
>>  http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk_______________________________________________
>> Openbts-discuss mailing list
>>  Ope...@li...
>>  https://lists.sourceforge.net/lists/listinfo/openbts-discuss
>
>------------------------------------------------------------------------------
>Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
>from Actuate! Instantly Supercharge Your Business Reports and Dashboards
>with Interactivity, Sharing, Native Excel Exports, App Integration & more
>Get technology previously reserved for billion-dollar corporations, FREE
>http://pubads.g.doubleclick.net/gampad/clk?id=164703151&iu=/4140/ostg.clktrk
>_______________________________________________
>Openbts-discuss mailing list
>Ope...@li...
>https://lists.sourceforge.net/lists/listinfo/openbts-discuss

Re: [Openbts-discuss] Noob Question about multiple ARFCN

[Arthur R. <art...@gm...>]

Is it UHD that needs to be improved or Transceiver52M ? or both ?

Le Thu Dec 18 2014 at 11:19:00, Michael Iedema <
mic...@ra...> a écrit :

> (please always use “reply all” so the list is included)
>
> Technically, yes it is possible. There is the question of priorities,
> effort and time as with any software project. :)
>
>
>
> > On Dec 18, 2014, at 11:14 AM, Arthur Rabaté <art...@gm...>
> wrote:
> >
> > It is clearer now !
> >
> > So, this might be feasible in a future version of UHD ?
> >
> > Regards,
> >
> > Arthur
> >
> > Le Thu Dec 18 2014 at 11:10:02, Michael Iedema <
> mic...@ra...> a écrit :
> > Hi Arthur,
> >
> > Not a silly question, I’m not sure it’s explained anywhere prominently.
> >
> > The OpenCell systems have Range Networks SDRs in them. The transceiver
> software for that SDR supports multiple ARFCNs using a single physical
> radio. The transceiver software for UHD based hardware does not yet support
> multiple ARFCNs.
> >
> > Regards,
> > -Michael
> >
> > > On Dec 18, 2014, at 10:37 AM, Arthur Rabaté <art...@gm...>
> wrote:
> > >
> > > Hi,
> > >
> > > I am wondering why we can't have multiple ARFCN (contiguous or not)
> with a single TRX.
> > > OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for
> example is supported but not B200)
> > > I do not know how opencell systems works for multiple arfcns but I can
> only assume that there are multiple trx inside ?
> > >
> > > This question may have been answered before; if so, I will have poorly
> searched.
> > >
> > > Thanks !
> > > ------------------------------------------------------------
> ------------------
> > > Download BIRT iHub F-Type - The Free Enterprise-Grade BIRT Server
> > > from Actuate! Instantly Supercharge Your Business Reports and
> Dashboards
> > > with Interactivity, Sharing, Native Excel Exports, App Integration &
> more
> > > Get technology previously reserved for billion-dollar corporations,
> FREE
> > > http://pubads.g.doubleclick.net/gampad/clk?id=164703151&
> iu=/4140/ostg.clktrk_______________________________________________
> > > Openbts-discuss mailing list
> > > Ope...@li...
> > > https://lists.sourceforge.net/lists/listinfo/openbts-discuss
> >
>
>

Re: [Openbts-discuss] Noob Question about multiple ARFCN

[Ralph A. S. d. <ra...@sc...>]

Most answers you already have got, just about the technical details…of course a software defined radio can transmit several carriers simultaneously within its bandwidth. The same applies for reception. For the radio it is just a complex sample stream, it makes no difference if one broadband or several narrowband signals are transmitted. This bandwidth usually is limited from the sampling rate and the link speed between PC and radio, also the PC must have enough horsepower, but for GSM the CPU usually is not the issue nowadays. Note that the gaps between the ARFCNs also count as bandwidth, so transmitting at the same time on 940.0 and 945.0 MHz means, more than 5 MHz of real bandwidth are necessary although the ARFCNs together occupy only some good 500 KHz.

 

UHD is not the problem, the Transceiver52 is the bottleneck, it has to be rewritten/extended to server more ARFCNs. 

 

Ralph.

 

From: Arthur Rabaté [mailto:art...@gm...] 
Sent: Thursday, December 18, 2014 10:38 AM
To: ope...@li...
Subject: [Openbts-discuss] Noob Question about multiple ARFCN

 

Hi,

 

I am wondering why we can't have multiple ARFCN (contiguous or not) with a single TRX.

OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for example is supported but not B200)

I do not know how opencell systems works for multiple arfcns but I can only assume that there are multiple trx inside ?

 

This question may have been answered before; if so, I will have poorly searched.

 

Thanks !

Re: [Openbts-discuss] Noob Question about multiple ARFCN

[Arthur R. <art...@gm...>]

Talking about the googling, found this :
https://github.com/davidste/openbts-multi-arfcn based on openbts P2.8.

Yet this does not seem to have been continued so I have my doubts.

Ralph, I did think of all the technical details you provided here but a
reminder is always welcome :)

Le Thu Dec 18 2014 at 12:03:33, Ralph A. Schmid, dk5ras <ra...@sc...>
a écrit :

> Most answers you already have got, just about the technical details…of
> course a software defined radio can transmit several carriers
> simultaneously within its bandwidth. The same applies for reception. For
> the radio it is just a complex sample stream, it makes no difference if one
> broadband or several narrowband signals are transmitted. This bandwidth
> usually is limited from the sampling rate and the link speed between PC and
> radio, also the PC must have enough horsepower, but for GSM the CPU usually
> is not the issue nowadays. Note that the gaps between the ARFCNs also count
> as bandwidth, so transmitting at the same time on 940.0 and 945.0 MHz
> means, more than 5 MHz of real bandwidth are necessary although the ARFCNs
> together occupy only some good 500 KHz.
>
>
>
> UHD is not the problem, the Transceiver52 is the bottleneck, it has to be
> rewritten/extended to server more ARFCNs.
>
>
>
> Ralph.
>
>
>
> *From:* Arthur Rabaté [mailto:art...@gm...]
> *Sent:* Thursday, December 18, 2014 10:38 AM
> *To:* ope...@li...
> *Subject:* [Openbts-discuss] Noob Question about multiple ARFCN
>
>
>
> Hi,
>
>
>
> I am wondering why we can't have multiple ARFCN (contiguous or not) with a
> single TRX.
>
> OsmoTRX offers a 2 ARFCN configuration but with 2 trx (B210 for example is
> supported but not B200)
>
> I do not know how opencell systems works for multiple arfcns but I can
> only assume that there are multiple trx inside ?
>
>
>
> This question may have been answered before; if so, I will have poorly
> searched.
>
>
>
> Thanks !
>