[srslte-users] COTS UE fails to connect to SRSLTE eNB with 6 PRBs ( 1.4MHz BW)

Sun Jul 7 23:23:01 UTC 2019

Try changing 'prach_freq_offset = 2;' value to '0' in sib,conf for PRB 6
case only.

> Date: Mon, 1 Jul 2019 19:46:56 +0000
> From: Venu Vennapusa <venu.vennapusa at cohere-technologies.com>
> To: "srslte-users at lists.softwareradiosystems.com"
>         <srslte-users at lists.softwareradiosystems.com>
> Subject: [srslte-users] COTS UE fails to connect to SRSLTE eNB with 6
>         PRBs (  1.4MHz BW)
> Message-ID:
>         <
> MW2PR20MB2074585497D3773F88F142ADCDF90 at MW2PR20MB2074.namprd20.prod.outlook.com
> >
>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Team,
>
>
>   I am trying to get a connection with COTS UE on srslte eNB with 6 PRBs.
> But UE never gets connection.
>
>
> Did anybody have success with 6 PRBs on srs eNB with COTS UE ? If yes, am
> I missing anything here ?
>
>
> Note that the prach_freq_offset  parameter has been set to 0. Please take
> a look and let me know if you need any other information.Any help here is
> much appreciated. Thanks in advance.
>
>
>
>
> eNB console logs:
>
> @@@@@@@@@@@@@
>
> vennave at gpu6:~/srsLTE$ sudo srsenb
> linux; GNU C++ version 7.4.0; Boost_106501; UHD_003.009.007-0-g50839059
>
>
> Built in Release mode using commit 5343b33f on branch master.
>
> ---  Software Radio Systems LTE eNodeB  ---
>
> Reading configuration file /home/vennave/.config/srslte/enb.conf...
> Opening USRP with args:
> type=x300,addr0=192.168.40.2,send_frame_size=8000,master_clock_rate=184.32e6
> -- X300 initialization sequence...
> -- Determining maximum frame size... 8000 bytes.
> -- Setup basic communication...
> -- Loading values from EEPROM...
> -- Setup RF frontend clocking...
> -- Radio 1x clock:184.32
> -- Initialize Radio0 control...
> -- Performing register loopback test... pass
> -- Initialize Radio1 control...
> -- Performing register loopback test... pass
> Setting frequency: DL=2680.0 Mhz, UL=2560.0 MHz
> Setting Sampling frequency 1.92 MHz
>
> ==== eNodeB started ===
> Type <t> to view trace
>
>
>
> Regards,
>
> Venu
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>
> Message: 2
> Date: Mon, 1 Jul 2019 22:20:43 +0000
> From: Venu Vennapusa <venu.vennapusa at cohere-technologies.com>
> To: "srslte-users at lists.softwareradiosystems.com"
>         <srslte-users at lists.softwareradiosystems.com>
> Subject: Re: [srslte-users] COTS UE fails to connect to SRSLTE eNB
>         with 6 PRBs (   1.4MHz BW)
> Message-ID:
>         <
> MW2PR20MB20741C005B7F48CC677EFF86CDF90 at MW2PR20MB2074.namprd20.prod.outlook.com
> >
>
> Content-Type: text/plain; charset="iso-8859-1"
>
> I came across this
> http://www.softwareradiosystems.com/pipermail/srslte-users/2018-September/001901.html
> and tried different PDSCH MCSs manually along with below changes, but no
> luck.
>
>
> rr.conf: nof_prb set to 0 for CQI and SR
>
> sib.conf:prach_freq_offset set to 0
>
> enb.conf: pdsch_mcs set to 10, 20, 24, 28
>
>
> Can some one please forward me with the working configuration.
>
>
>
>
> ________________________________
> From: srslte-users <srslte-users-bounces at lists.softwareradiosystems.com>
> on behalf of Venu Vennapusa <venu.vennapusa at cohere-technologies.com>
> Sent: Monday, July 1, 2019 12:46 PM
> To: srslte-users at lists.softwareradiosystems.com
> Subject: [srslte-users] COTS UE fails to connect to SRSLTE eNB with 6 PRBs
> ( 1.4MHz BW)
>
>
> Hi Team,
>
>
>   I am trying to get a connection with COTS UE on srslte eNB with 6 PRBs.
> But UE never gets connection.
>
>
> Did anybody have success with 6 PRBs on srs eNB with COTS UE ? If yes, am
> I missing anything here ?
>
>
> Note that the prach_freq_offset  parameter has been set to 0. Please take
> a look and let me know if you need any other information.Any help here is
> much appreciated. Thanks in advance.
>
>
>
>
> eNB console logs:
>
> @@@@@@@@@@@@@
>
> vennave at gpu6:~/srsLTE$ sudo srsenb
> linux; GNU C++ version 7.4.0; Boost_106501; UHD_003.009.007-0-g50839059
>
>
> Built in Release mode using commit 5343b33f on branch master.
>
> ---  Software Radio Systems LTE eNodeB  ---
>
> Reading configuration file /home/vennave/.config/srslte/enb.conf...
> Opening USRP with args:
> type=x300,addr0=192.168.40.2,send_frame_size=8000,master_clock_rate=184.32e6
> -- X300 initialization sequence...
> -- Determining maximum frame size... 8000 bytes.
> -- Setup basic communication...
> -- Loading values from EEPROM...
> -- Setup RF frontend clocking...
> -- Radio 1x clock:184.32
> -- Initialize Radio0 control...
> -- Performing register loopback test... pass
> -- Initialize Radio1 control...
> -- Performing register loopback test... pass
> Setting frequency: DL=2680.0 Mhz, UL=2560.0 MHz
> Setting Sampling frequency 1.92 MHz
>
> ==== eNodeB started ===
> Type <t> to view trace
>
>
>
> Regards,
>
> Venu
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