openbts-discuss — General technical discussions.

Re: [Openbts-discuss] (no subject)

[Abdullahi O. <abd...@gm...>]

i have successfully compiled the codes but whenever i try to start the
components, i get this  output
'start: Unable to connect to Upstart: Failed to connect to socket
/com/ubuntu/upstart: Connection refused'
can you help solve this?

On Sun, 23 Jun 2019 at 18:21, Abdullahi Oladimeji <
abd...@gm...> wrote:

> help me please,
> i tried running it in admin mode and i am getting
> tcsbts19@tcsbts19-oneTwo-M3700:~/dev$ sudo ./build.sh B200 openbts
> [sudo] password for tcsbts19:
> "# checking for a supported radio type
> # - found
> # single component specified
> # - found, building openbts
> # checking for a compatible build host
> # - fully supported host detected: Ubuntu 16.04
> #
> # adding additional repo tools
> # - done
>
> # checking build dependencies
> # - done
>
> # make a home for this build
> mkdir -p BUILDS/2019-06-23--16-52-03
> # openbts - building Debian package
> cd openbts
> dpkg-buildpackage -us -uc
> dpkg-buildpackage: source package openbts
> dpkg-buildpackage: source version 5.0
> dpkg-buildpackage: source distribution unstable
> dpkg-buildpackage: source changed by Range Packager <
> bui...@ra...>
> dpkg-buildpackage: host architecture i386
>  dpkg-source --before-build openbts
> dpkg-checkbuilddeps: error: Unmet build dependencies: liba53
> dpkg-buildpackage: warning: build dependencies/conflicts unsatisfied;
> aborting
> dpkg-buildpackage: warning: (Use -d flag to override.)
> # ERROR: command failed!"
> i have these libraries installed and i don't know why it keeps popping up.
> i'm on a week deadline please
>

Re: [Openbts-discuss] Request for help

[Abdullahi O. <abd...@gm...>]

i have successfully compiled the codes but whenever i try to start the
components, i get this  output
'start: Unable to connect to Upstart: Failed to connect to socket
/com/ubuntu/upstart: Connection refused'
can you help solve this?

On Sun, 23 Jun 2019 at 19:39, Abdullahi Oladimeji <
abd...@gm...> wrote:

>
> i tried running running the following code in admin mode and i am getting
> tcsbts19@tcsbts19-oneTwo-M3700:~/dev$ sudo ./build.sh B200 openbts
> [sudo] password for tcsbts19:
> "# checking for a supported radio type
> # - found
> # single component specified
> # - found, building openbts
> # checking for a compatible build host
> # - fully supported host detected: Ubuntu 16.04
> #
> # adding additional repo tools
> # - done
>
> # checking build dependencies
> # - done
>
> # make a home for this build
> mkdir -p BUILDS/2019-06-23--16-52-03
> # openbts - building Debian package
> cd openbts
> dpkg-buildpackage -us -uc
> dpkg-buildpackage: source package openbts
> dpkg-buildpackage: source version 5.0
> dpkg-buildpackage: source distribution unstable
> dpkg-buildpackage: source changed by Range Packager <
> bui...@ra...>
> dpkg-buildpackage: host architecture i386
>  dpkg-source --before-build openbts
> dpkg-checkbuilddeps: error: Unmet build dependencies: liba53
> dpkg-buildpackage: warning: build dependencies/conflicts unsatisfied;
> aborting
> dpkg-buildpackage: warning: (Use -d flag to override.)
> # ERROR: command failed!"
> i have these libraries installed and i don't know why it keeps popping up.
> i'm on a week deadline please
>

[Openbts-discuss] urgent question please

[Abdullahi O. <abd...@gm...>]

i appreciate the feedback i got for the last question i posted.
Now, i have been able to solve for the libzmq but the liba53 is still
giving me problems anytime i try "sudo ./build.sh B200 openbts"
the output i get is
sudo ./build.sh B200 openbts
# checking for a supported radio type
# - found
# single component specified
# - found, building openbts
# checking for a compatible build host
# - fully supported host detected: Ubuntu 16.04
#
# adding additional repo tools
# - done

# checking build dependencies
# - done

# make a home for this build
mkdir -p BUILDS/2019-07-02--12-26-31
# openbts - building Debian package
cd openbts
dpkg-buildpackage -us -uc
dpkg-buildpackage: source package openbts
dpkg-buildpackage: source version 5.0
dpkg-buildpackage: source distribution unstable
dpkg-buildpackage: source changed by Range Packager <
bui...@ra...>
dpkg-buildpackage: host architecture i386
 dpkg-source --before-build openbts
dpkg-checkbuilddeps: error: Unmet build dependencies: liba53
dpkg-buildpackage: warning: build dependencies/conflicts unsatisfied;
aborting
dpkg-buildpackage: warning: (Use -d flag to override.)
# ERROR: command failed!
pls, suggest solutions

[Openbts-discuss] Request for help

[Abdullahi O. <abd...@gm...>]

i tried running running the following code in admin mode and i am getting
tcsbts19@tcsbts19-oneTwo-M3700:~/dev$ sudo ./build.sh B200 openbts
[sudo] password for tcsbts19:
"# checking for a supported radio type
# - found
# single component specified
# - found, building openbts
# checking for a compatible build host
# - fully supported host detected: Ubuntu 16.04
#
# adding additional repo tools
# - done

# checking build dependencies
# - done

# make a home for this build
mkdir -p BUILDS/2019-06-23--16-52-03
# openbts - building Debian package
cd openbts
dpkg-buildpackage -us -uc
dpkg-buildpackage: source package openbts
dpkg-buildpackage: source version 5.0
dpkg-buildpackage: source distribution unstable
dpkg-buildpackage: source changed by Range Packager <
bui...@ra...>
dpkg-buildpackage: host architecture i386
 dpkg-source --before-build openbts
dpkg-checkbuilddeps: error: Unmet build dependencies: liba53
dpkg-buildpackage: warning: build dependencies/conflicts unsatisfied;
aborting
dpkg-buildpackage: warning: (Use -d flag to override.)
# ERROR: command failed!"
i have these libraries installed and i don't know why it keeps popping up.
i'm on a week deadline please

[Openbts-discuss] (no subject)

[Abdullahi O. <abd...@gm...>]

help me please,
i tried running it in admin mode and i am getting
tcsbts19@tcsbts19-oneTwo-M3700:~/dev$ sudo ./build.sh B200 openbts
[sudo] password for tcsbts19:
"# checking for a supported radio type
# - found
# single component specified
# - found, building openbts
# checking for a compatible build host
# - fully supported host detected: Ubuntu 16.04
#
# adding additional repo tools
# - done

# checking build dependencies
# - done

# make a home for this build
mkdir -p BUILDS/2019-06-23--16-52-03
# openbts - building Debian package
cd openbts
dpkg-buildpackage -us -uc
dpkg-buildpackage: source package openbts
dpkg-buildpackage: source version 5.0
dpkg-buildpackage: source distribution unstable
dpkg-buildpackage: source changed by Range Packager <
bui...@ra...>
dpkg-buildpackage: host architecture i386
 dpkg-source --before-build openbts
dpkg-checkbuilddeps: error: Unmet build dependencies: liba53
dpkg-buildpackage: warning: build dependencies/conflicts unsatisfied;
aborting
dpkg-buildpackage: warning: (Use -d flag to override.)
# ERROR: command failed!"
i have these libraries installed and i don't know why it keeps popping up.
i'm on a week deadline please

Re: [Openbts-discuss] request for help

[Karim G. <gab...@gm...>]

Hmm, try this...

https://appuals.com/fix-unmet-dependencies-error-ubuntu/

Cheers

On Sun, 23 Jun 2019, 19:13 Abdullahi Oladimeji, <
abd...@gm...> wrote:

> thanks.
> i tried running it in admin mode and i am getting
> tcsbts19@tcsbts19-oneTwo-M3700:~/dev$ sudo ./build.sh B200 openbts
> [sudo] password for tcsbts19:
> "# checking for a supported radio type
> # - found
> # single component specified
> # - found, building openbts
> # checking for a compatible build host
> # - fully supported host detected: Ubuntu 16.04
> #
> # adding additional repo tools
> # - done
>
> # checking build dependencies
> # - done
>
> # make a home for this build
> mkdir -p BUILDS/2019-06-23--16-52-03
> # openbts - building Debian package
> cd openbts
> dpkg-buildpackage -us -uc
> dpkg-buildpackage: source package openbts
> dpkg-buildpackage: source version 5.0
> dpkg-buildpackage: source distribution unstable
> dpkg-buildpackage: source changed by Range Packager <
> bui...@ra...>
> dpkg-buildpackage: host architecture i386
>  dpkg-source --before-build openbts
> dpkg-checkbuilddeps: error: Unmet build dependencies: liba53
> dpkg-buildpackage: warning: build dependencies/conflicts unsatisfied;
> aborting
> dpkg-buildpackage: warning: (Use -d flag to override.)
> # ERROR: command failed!"
>
> On Sun, 23 Jun 2019 at 17:06, Karim Gabsi <gab...@gm...> wrote:
>
>> Thats a Operating system error telling you that you don't have the
>> permission to create a folder, try running it in admin mode....
>>
>> On Sun, 23 Jun 2019, 19:04 Abdullahi Oladimeji, <
>> abd...@gm...> wrote:
>>
>>> Good day.
>>> my name is Abdullahi, a final year student of department of
>>> telecommunication science in University of Ilorin and i am working on
>>> OpenBTS formy final year project and anytime i try building the code, this
>>> is what i get:
>>> mkdir: cannot create directory ‘BUILDS/2019-06-23--15-51-57’: Permission
>>> denied
>>> i really need your help.
>>> best regards
>>> _______________________________________________
>>> Openbts-discuss mailing list
>>> Ope...@li...
>>> https://lists.sourceforge.net/lists/listinfo/openbts-discuss
>>>
>>

Re: [Openbts-discuss] request for help

[Karim G. <gab...@gm...>]

Thats a Operating system error telling you that you don't have the
permission to create a folder, try running it in admin mode....

On Sun, 23 Jun 2019, 19:04 Abdullahi Oladimeji, <
abd...@gm...> wrote:

> Good day.
> my name is Abdullahi, a final year student of department of
> telecommunication science in University of Ilorin and i am working on
> OpenBTS formy final year project and anytime i try building the code, this
> is what i get:
> mkdir: cannot create directory ‘BUILDS/2019-06-23--15-51-57’: Permission
> denied
> i really need your help.
> best regards
> _______________________________________________
> Openbts-discuss mailing list
> Ope...@li...
> https://lists.sourceforge.net/lists/listinfo/openbts-discuss
>

[Openbts-discuss] request for help

[Abdullahi O. <abd...@gm...>]

Good day.
my name is Abdullahi, a final year student of department of
telecommunication science in University of Ilorin and i am working on
OpenBTS formy final year project and anytime i try building the code, this
is what i get:
mkdir: cannot create directory ‘BUILDS/2019-06-23--15-51-57’: Permission
denied
i really need your help.
best regards

[Openbts-discuss] Sometimes load does not Released

[Amirhosein n. <ami...@ya...>]

Hi everybody,
Sometimes when OpenBTS is working and users are making calls or sms or registration , resources that allocated to them dont release at all and must restart OpenBTS to get everything ok. I find this problem by using load and chans CLI.
how can i release them without restarting program???
Tnx.

[Openbts-discuss] USRP, making a BTS without problems

[Karim G. <gab...@gm...>]

Hi everyone,
Firstly, let me introduce myself.
My name is Karim, I'm a professor/teacher at the university of my hometown
in Belgium.
I mainly teach computer programming languages, but also business analysis,
and also other conceptual courses (databases, design patterns, mobile apps,
servers, IoT, etc.)
All in all, I consider myself an expert when it comes to software side of
things.

I'm currently not teaching this year, due to personal reasons and projects.
Ex. working on a book and some other software projects (p2p applications,
software encryption/decryption and compression systems).
But that's neither here or there.

In the past I've had few projects that introduced me in the world of
electronics. From making simple circuits to making them adaptable to
software implementation.
Few examples of this:
- eSuit: or electrical suit, was a hardware project where I took an arduino
and made circuit that acted much like a EMS (electrical muscle stimulator)
like the ones you see from those fishy tv-advertisement. The suit was
designed to *safely *'shock' the user when they get hit in a videogame.
That project was made when VR (virtual reality) got introduced and hyped. I
was just taking it to the next level. But there was a lot of grace, where I
learned to combine software and api's with custom hardware.

- GSM module project: Was a module that fitted on an arduino and you could
send SMS/MMS/VOICE/Internet. Again, it was a nice educational way to learn
about GSM Gateways, bulk messages, etc. A very easy project, but very
educational. Later on I moved to real gateways, with shortcodes and stuff.

Way back, when I was just a first year bachelor student at the university
where I currently work. I took the data from the local police department
concerning accidents. (police officers write the details of the accident on
paper, and later it got digitized)  So I wrote a simple application that
analyses the data and tries the find patterns. (accidents due to speed
limit, ignoring priorities, confusing traffic signs, defect traffic poles,
etc..) After which the app suggested different options to change the
regulation or traffic way to prevent further accidents. I then gave it to
the police department to implement locally.

I always try to work cost effective -> maximum potential, minimal cost.
But when it comes to radio, I'm quite new to it. I've decided to do a bit
of research the next coming months and that's why I'm here.

I'd like to build a full fledged BTS without problems, let me clarify:
When I googled this, they mostly demonstrate a private GSM network, which
is cool but not what I'm looking for.
What I like to build is a BTS that acts as a 'relay' or 'intermediate'
stations.
Cellphone -> custom BTS -> real BTS or cell tower.

Why? Many reasons:
- First, and always, educational. I love to learn, to experiment, to break
and to improve.
- Second, If I can build this and program it, the possibilities are endless.

Endless possibilities:
- I could make an app that's shows the user available parking spots in our
hometown. (Our hometown uses sensors underneath the parking ground) and
send a text on request of it's nearest available spot.
- My hometown sends out paper-versions in everyone's mailbox when an event
is going to take place, or when something is down
(water/electricity/etc...) Wouldn't it be awesome if they could just send
an SMS, because everyone in the neighbourhood would be connected to the
custom BTS. GO GREEN!
- My hometown only sends an SMS in case of something very special, like
fire outburst or something, which again they use a shortcode, which is also
expensive!
-  Also this doesn't have to be about the city hall or hometown. Do you
remember when you enter a country you receive a welcome message. That kind
of application could be used at schools, companies, etc. (ex. if schools
have your GSM number, instead of paying a telecom provider, they can just
send it through the custom BTS, example: Class X is delayed to Y PM, or
Moved to room 120...)
- The possibility for the user to call and text completely free (at least
to those connected to the same BTS) and to switch back if they want to
communicate using their provider.
- Etc...

So from the research I've already done, I know it's possible using a USRP.
I'm also about the read the book 'getting started with openBTS'.
But before I purchase anything, I had a few questions:

1) Any advice on this matter? (don't bother with legal stuff, I'll get that
sorted out aswell)
2) I'm mainly concerned about safety, cause If I build this, which it will
be hit and miss, retry and retry, I wouldn't want someone not to be able to
call emergency services like (police or ambulance or fire department, etc)
So what should I take into consideration?

3) I'm hesitant as to which USRP I should buy (
https://www.ettus.com/product-categories/usrp-bus-series/):
- What is the real advantage of MIMO? see B210. Because the B210 is quite
expensive.
- If MIMO is not necessary for what I want to accomplish, I was thinking
about the B205mini-i as it has the same FPGA as B210.

4) I was thinking of having a low dBm as Rx when I'm in development mode
and a high TX, but how much TX dBM is need to reach a cell tower? European
cellphones have 23 dBm? This kind of information is kind of hard to find.

5) When I'm trying to test this, whether it be in production mode, or
testing in the open, what antenna do you recommend? And I'm assuming I
would be needing an amplifier?

6) Any other pitfalls I should know about?

Thank you!

[Openbts-discuss] USRP with openbts

[Karim G. <gab...@gm...>]

I'm interested in buying a USRP.
According to the FAQ of ettus there's a link to the wiki for the wiki about
build and install of openbts.
FAQ: https://kb.ettus.com/B200/B210/B200mini/B205mini#FAQ
Link: http://wush.net/trac/rangepublic/wiki/BuildInstallRun

Unfortunately, that link requires a login, where can I sign up for this?

Greetings

[Openbts-discuss] Catch up

[GERVAIS H. <unc...@ya...>]

Hi guys ,I am so excited with this amazing project. One question , do you guys reckon OpenBTS can be or is already being used in any business environment ?  
Thanks

[Openbts-discuss] Error building OpenBTS

[Balaji K. <kol...@gm...>]

Hi I am trying to build OpenBTS in Ubontu 32 bit OS.

I am getting the following Error..  I am using UHD version as 3.15.0

g++ -DHAVE_CONFIG_H -I. -I..   -D'REPO_REV="646bb6e79f
CommonLibs:76b71d509b"' -I../apps -I../CommonLibs -I../Control -I../GSM
-I../GSMShare -I../GPRS -I../SGSNGGSN -I../SIP -I../SMS -I../TRXManager
-I../Globals -I../CLI -I../Peering -I../NodeManager
-I../NodeManager/JsonBox-0.4.3/include -I../Scanning
-I/usr/local/include     -g -O2 -Wall -pthread -ldl -rdynamic
-DTIMESTAMP_ISO=`date +'"%Y-%m-%dT%H:%M:%S"'`  -MT runTransceiver.o -MD -MP
-MF .deps/runTransceiver.Tpo -c -o runTransceiver.o runTransceiver.cpp
mv -f .deps/runTransceiver.Tpo .deps/runTransceiver.Po
/bin/bash ../libtool  --tag=CXX   --mode=link g++ -g -O2 -Wall -pthread
-ldl -rdynamic -DTIMESTAMP_ISO=`date +'"%Y-%m-%dT%H:%M:%S"'`    -o
transceiver runTransceiver.o libtransceiver.la ../GSM/libGSM.la
../CommonLibs/libcommon.la  -L/usr/local/lib -luhd -lboost_system    -la53
-lzmq
libtool: link: g++ -g -O2 -Wall -pthread -rdynamic
-DTIMESTAMP_ISO=\"2019-03-13T10:26:26\" -o transceiver runTransceiver.o
./.libs/libtransceiver.a ../GSM/.libs/libGSM.a
../CommonLibs/.libs/libcommon.a -ldl /usr/lib/i386-linux-gnu/libsqlite3.so
-L/usr/local/lib -luhd -lboost_system -la53 -lzmq -pthread
./.libs/libtransceiver.a(UHDDevice.o): In function `uhd_device::start()':
/home/waveguru/dev/openbts/Transceiver52M/UHDDevice.cpp:667: undefined
reference to `uhd::msg::register_handler(void (* const&)(uhd::msg::type_t,
std::string const&))'
collect2: error: ld returned 1 exit status
make[3]: *** [transceiver] Error 1
make[3]: Leaving directory `/home/waveguru/dev/openbts/Transceiver52M'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/home/waveguru/dev/openbts'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/home/waveguru/dev/openbts'
make: *** [install-arch] Error 2
dpkg-buildpackage: error: fakeroot debian/rules binary gave error exit
status 2
# ERROR: command failed!

Can some one help me resolving this issue.
-- 
Thanks & Regards
Balaji Rao Kolla

[Openbts-discuss] OpenBTS-REgistration

[Basse A. <b4...@gm...>]

Hi,

I would like to ask, is there any way to measure the performance of
sipauthserve? What I meant is, is there any maximum number of user could
register per minute that can be handled by sipauthserve or  openbts?
because,I found, when multiple users try to register at the same time, only
like 3-4 users that can register in one minute..  thank you

regards,
Bass

[Openbts-discuss] Two USRP Connected to system

[Amirhosein n. <ami...@ya...>]

Hi everybody
I have two usrp n210 with different ip address connected to my system. when i power on OpenBTS, system connect to these two hardware randomly.How can i specify witch usrp OpenBTS connect to ? 

Re: [Openbts-discuss] Question regarding GSM.Radio.RSSITarfget parameter?

[Rajesh T. <raj...@co...>]

Hi everyone, 

I design PBX systems that find extensive applications in Defense & Railway projects in India. 

We are looking for openBTS kind of thing for mobility with the objective of providing a voice mobility solution that is seamlessly managed & controlled from the enterprise PBX. Objective is to offer such solutions integrated with our PBX to Defence forces & Railways who have frequency bands allocated to them. It may find applications in some Large enterprises also. These customers are familiar with our PBX systems, can mange control & configure them on their own. Objective of integration is that customer uses PBX GUI for configuring all features & service and can use mobile phones exactly the same way he uses the IP Phone, Analog phone or Digital Key telephone. 

Ideally an OpenBTS solution should work like a media gateway extending the RF LTE based coverage that will support mobility service to 100 odd subscribers. 

Kindly let us know if you can support us on this development / integeration. 

Waiting for your reply. 

Best Regards 
Rajesh Tuli 


----- On 17 May, 2018, at 15:08, oscar llerena <osc...@gm...> wrote: 

Hi everyone 
Right, straight to the poing! 

Objective: 
I am looking for a way to measure how much power in dBm is OpenBTS RX Frontend receiving from a certain MS using the MS and/or OpenBTS CLI information, in other words: the RSSI on the uplink signal. 

My network consists on an OpenBTS implementation using a laptop with OpenBTS + USRP B210 with omnidirectional antennas (Gain=1-3dBi) in 90º degree configuration to minimize interference from Tx on Rx antenna. 

My handset device is a Lonet SIM808 GPRS module which is Class1 device (max Tx Power = 30dBm). Its TX/RX antenna has a 0dBi gain. SIM808 is able to provide Radio Information through the execution of AT Commands. So after some value interpretation, the RSSI on the Downlink can be known. The distance between the USRP (Base Station) and the Lonet SIM808 (MS) is about 4 m. Though it is susceptible to multipath interference, I effort to create a LOS scenario between Tx and Rx, so the Path Loss calculated can be considered coherent. 

OpenBTS allows to modify the Base Station (BS) Tx Power with the "power" command on OpenBTS CLI. If power is set to 10, then it prompts a message indicating that: 

current downlink power is -10 dB with respect to full scale 

I know that on USRPB210, the max Tx power is 10 dBm. So if OpenBTS power parameter is set to 0, then BS Tx power would be 10 dBm + 3 dBi of Antenna Gain = 13 dBm. To be sure of this I measured the USRP Tx power connecting the Tx port directly to a spectrum analyzer with power parameter set on 0 (cero) and the spectrum analyzer screen showed a signal with its peak close to 10 dBm, I guess some losses are due to the coaxial cable. 

Therefore, the Path Losses on the DL can be calculated by subtracting the SIM808 RSSI on dBm value minus the BS Tx Power on dBm value. Until now, all of that has been the downlink path. 

On the Uplink path Lonet SIM808 doesn't provide info about its Tx power and OpenBTS doesn't provide a way to check RSSI levels from the handsets attached. I don't find any radio info on the GPRS timeslots running the "chans -a -l" command on OpenBTS CLI. So one way to figure out the Uplink Channel Radio is to solve the GPRS Uplink Power Control equation which is [1]: 

Pt = min ( Gamma_0 - Gamma_C - alpha ( C + 48 ) , Pm) 

On OpenBTS default configuration: 
* Pt = handset Tx power in dBm 
* Gamma_0 = 36 dBm for DCS 1800 Band 
* Gamma_C = 31 (default) 
* alpha = 10 (default) 
* C = RSSI on the DL (it does not specify if it is on dBm so I assume it) 

Now, this GPRS Uplink Power Control algorithm on the BS sets the handset Tx Power, so the RSSI on the Uplink, in other words: the power level received by the BS from the handset is above the "GSM.Radio.RSSITarget" which is an OpenBTS parameter. The definition of the "GSM.Radio.RSSITarget" parameter is: 

OpenBTS> devconfig GSM.Radio.RSSITarget 
GSM.Radio.RSSITarget -65 
- description: Target uplink RSSI (Received Signal Strength Indication) for MS power control loop, in dB wrt to A/D full scale. The MS power control loop adjusts MS TXPWR (transmit power) to try to keep RSSI at this level, or to satisfy GSM.Radio.SNRTarget, whichever requires more power. Should be 6-10 dB above the noise floor. 
- units: dB 
- type: value range 
- default value: -50 
- visibility level: customer tune - should only be changed to tune an installation to better suit the physical environment or MS usage pattern 
- static: 0 
- valid values: from -75 to -25 


I am sorry to have bother you with all this but I don't understand what means: "... in dB wrt to A/D full scale" on the GSM.Radio.RSSITarget description. My questions are: 

* What means A/D full scale in terms of dBm? I thought that Target Uplink RSSI was -65dBm but that "wrt to A/D full" term makes me think that it is -65dB with respect the absolute USRP B210 Rx sensitivity 

* If Uplink RSSI is known then I will use DL Path Loss as the UL Path Loss to calculate how much Tx Power the handset is sending, so a Link Budget can be figure out. Anyone considers another point of view? 

References: 
[1]: http://openbts.org/site/wp-content/uploads/2014/07/OpenBTS-4.0-Manual.pdf Page = 82/83 

















http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2015-January/012209.html 

Oscar Llerena 
Tlf: 997575596 

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Re: [Openbts-discuss] sdr compatible with usrp b210

[Rajesh T. <raj...@co...>]

Dear Wu, 

I noticed this mail a while ago and thought of checking up the updated status with you after six months. 

I design PBX systems that find extensive applications in Defense & Railway projects in India. 

We are looking for openBTS kind of thing for mobility with the objective of providing a voice mobility solution that is seamlessly managed & controlled from the enterprise PBX. Objective is to offer such solutions integrated with our PBX to Defence forces & Railways who have frequency bands allocated to them. It may find applications in some Large enterprises also. These customers are familiar with our PBX systems, can mange control & configure them on their own. Objective of integration is that customer uses PBX GUI for configuring all features & service and can use mobile phones exactly the same way he uses the IP Phone, Analog phone or Digital Key telephone. 

Ideally an OpenBTS solution should work like a media gateway extending the RF LTE based coverage that will support mobility service to 100 odd subscribers. 

Kindly let us know if you can support us on this. 

Waiting for your reply. 

Best Regards 
Rajesh Tuli 


----- On 19 Jun, 2018, at 15:09, wu jo <joh...@ho...> wrote: 




hi all, 


I want to introduce an sdr that compatible with usrp b210. 

we develop an sdr according to b210 schematic. the performance and interface is the same as b210. it works fine with openbts, openairinterface, srslte, gnuradio, uhd and so on. 

anyone need a b210 and can not afford its price can use this one instead. 





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[Openbts-discuss] openbts encoding for using alphanumeric char in sendsms callingID

[haiderali91 <hai...@pr...>]

Hi,
I am tweaking OpenBTS code to use alphanumeric characters in callingID/ senderID while sending sms from network to own subscriber (using sendsms command).
To achieve this, i tried following two methods:
1. In GSML3CCElements.h file, i changed TypeOfNumber to AlphaNumeric and NumberingPlan to UnknownPlan. But It did not worked.
2. Furthermore, I tried to change parseV and encode methods GSML3CCElements.cpp.
https://github.com/RangeNetworks/openbts/blob/master/GSM/GSML3CCElements.cpp

static int encode(char c, bool *invalid)
{
//return c == '*' ? 10 : c == '#' ? 11 : c-'0';
if (c == '*') return 10;
if (c == '#') return 11;
if (isdigit(c)) return c - '0';
*invalid = true;
return 0; // Not sure what to do.
}
By default, we can set callingID/ senderID of sendsms as 1-9 and *#. After checking the source code, it was identified that * and # are mapped/ encoded to decimal 10 and 11. After checking further, it was identified that A, B and C are mapped to 12, 13 and 14 respectively. However, I cannot map anyfurther than this, either no character appears or it start encoding/ mapping to digits (0-9), alphabets (A,B,C) and symbols (* and #).

What is the encoding scheme/ pattern used in openbts for this purpose? And How can i use alphanumeric characters in callingID of sendsms command?

Best,
Haider
Sent with [ProtonMail](https://protonmail.com) Secure Email.

[Openbts-discuss] using alphanumeric characters in sourceaddress of sendsms

[haiderali91 <hai...@pr...>]

Hi,

I want to use alphanumeric characters in sendsms (CLI Command) feature of OpenBTS. Adding just characters doesn't work. How can i achieve it?

Regards,

Re: [Openbts-discuss] Openbts no audio again....

[Gullik W. <gul...@co...>]

Testing update:

I registered a sip phone in the OpenBTS asterisk. I can call out/in to 
the PSTN via my home

asterisk PABX. If I call a MS it rings, I can answer, but no audio. So 
it looks like MS answer

is broken with regards to RTP.

Now a call from MS, SIP phone behaves the same, answering = no audio, 
originating = OK.

Just seeing a reference to GSM.SpeechBuffer, I increased it to 20. No luck.

Gullik

On 2018-11-29 14:00, Gullik Webjorn wrote:
> Hi,
>
> I am just retrieving the bit's and pieces of my old OpenBts , and 
> decided to upgrade to latest
>
> and greatest. This runs on Ubuntu 14.04 LTS, and after a while I had 
> it all up and running.
>
> OpenBts asterisk is a leaf node of my main asterisk PABX.
>
> However, I cannot get audio between MS.
>
> I can call out on the PSTN, MS -> OpenBts asterisk -> main asterisk -> 
> SIP trunk to provider.
>
> I can call 2600 etc, from MS.
>
> If I call MS -> MS I get no audio ( however I can see 4 new UDP ports 
> on asterisk )
>
> call terminates after half a minute.
>
> If I call from a local phone on main PBX I get call signalling ok, 
> MSringing but no audio.
>
> The suspicion is that the problem has to do with OpenBts establishing 
> the RTP ports to
>
> the MS, this fits what I am seeing, while MS initiated calls are OK.
>
> I have seen this problem repeatedly over the years, I did NOT have it 
> with OpenBts 2.8 / Ubuntu 12.02 LTS,
>
> but have not seen any conclusive analysis / fix for the problem.
>
> This is NOT related to signal strength, firewalling etc, but points to 
> an OpenBts / RTP bug...
>
> Anyone?
>
> Gullik
>

[Openbts-discuss] Openbts no audio again....

[Gullik W. <gul...@co...>]

Hi,

I am just retrieving the bit's and pieces of my old OpenBts , and 
decided to upgrade to latest

and greatest. This runs on Ubuntu 14.04 LTS, and after a while I had it 
all up and running.

OpenBts asterisk is a leaf node of my main asterisk PABX.

However, I cannot get audio between MS.

I can call out on the PSTN, MS -> OpenBts asterisk -> main asterisk -> 
SIP trunk to provider.

I can call 2600 etc, from MS.

If I call MS -> MS I get no audio ( however I can see 4 new UDP ports on 
asterisk )

call terminates after half a minute.

If I call from a local phone on main PBX I get call signalling ok, 
MSringing but no audio.

The suspicion is that the problem has to do with OpenBts establishing 
the RTP ports to

the MS, this fits what I am seeing, while MS initiated calls are OK.

I have seen this problem repeatedly over the years, I did NOT have it 
with OpenBts 2.8 / Ubuntu 12.02 LTS,

but have not seen any conclusive analysis / fix for the problem.

This is NOT related to signal strength, firewalling etc, but points to 
an OpenBts / RTP bug...

Anyone?

Gullik

[Openbts-discuss] One to Multi Node Network

[Keval P. <kev...@gm...>]

Dear All,

I am trying to establish a base station netwrok using two openbts.

I have followed the way as it is defined in the book Getting started with
Openbts.

Total 3 systems are there, on one system asterisk, smqueue and sipauthserve
is running and on other two systems Openbts is running.

Now while I am trying to call it is showing Line Busy on my mobile screen.
Echo call and SMS both are not happening in this setup.

While I use only single system for Openbts, asterisk, smqueue and
sipauthserve, it is running perfectly. I can able to do call and SMS.

Please help with this problem if anyone come across this problem.

Re: [Openbts-discuss] New to openbts. Are there non license commercial bands?

[<ke...@cr...>]

Hi Tom,

Yes, emitting anything in the GSM bands, not just operating OpenBTS, would require an FCC license.  It is possible (or at least it was a few years ago) to apply for an experimental license with the FCC to operate a base station, but I do not know what is required to do so.  As far as operating in the ISM bands… in theory, you could operate a cellular system in the unlicensed bands, but then you would need to have a transmitter (for the base station) and transceivers (i.e. phones) that operate in the same frequency range.

v/r
Ken 

[Openbts-discuss] usrp b210 compatible sdr

[john wu <joh...@ho...>]

hi all,
sorry for disturbing.

I want to introduce an sdr that compatible with usrp b210.

we develop an sdr according to b210 schematic. the performance and interface is the same as b210. it works fine with openbts, openbts-umts, openairinterface, srslte, gnuradio and so on.



www.zhixun-wireless.top<http://www.zhixun-wireless.top/>
provide SDR PA LNA duplexer

Best Regards

Re: [Openbts-discuss] New to openbts. Are there non license commercial bands?

[john wu <joh...@ho...>]

Hi Tom,

you can use HAM band but there is no cell phone that use HAM band. so you can only use for researching if work on HAm band. if you want to make communicate cell for the cellphone you need the licensed band. for licensed band you can check the GSM standard and your local network settings to check if there is free(not means free for money but only not used by communicate operator) band to use. and you also need to check your local law. different place will have different law to use the band.


www.zhixun-wireless.top<http://www.zhixun-wireless.top/>
provide SDR PA LNA duplexer

Best Regards

________________________________
From: Tom Cipollone <min...@gm...>
Sent: Monday, November 19, 2018 1:47:07 PM
To: ope...@li...
Subject: [Openbts-discuss] New to openbts. Are there non license commercial bands?

Hi,

I have been researching openbts and have found posts, which are older, that say that setting up your own private cell network requires some kind of an fcc license. I've seen some information concerning using HAM radio bands for GSM but since I am an "old" ham I know that the ham bands are used for hobbies and emergencies but NOT for commercial purposes.

Are there bands or parts of the ISM band that can be used for license free private cell networks?

Thank You
Tom