[srslte-users] Connect UE to Internet by eNB.

Fri Sep 20 13:41:44 UTC 2019

Hi,

As you said, I disconnected the *Ethernet* cable and turned off wifi.
Unfortunately, the internet is still down. I would like to ask for
some additional hints about what may cause the blockade of the Internet. If
routing is needed, could someone send a link to a
simple tutorial?

*I additionally send a printout from ifconfig UE PC:*

tun_srsue Link encap:UNSPEC  HWaddr
00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet addr:172.16.0.4  P-t-P:172.16.0.4  Mask:255.255.255.0
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:0 (0.0 B)  TX bytes:48 (48.0 B)

*Printout from UE srsLTE:*

Reading configuration file /home/eupc01/.config/srslte/ue.conf...

Built in Release mode using commit c4bcd6e on branch master.

Opening 1 RF devices with 1 RF channels...
[INFO] [UHD] linux; GNU C++ version 5.4.0 20160609; Boost_105800;
UHD_3.14.1.0-release
[INFO] [LOGGING] Fastpath logging disabled at runtime.
Opening USRP with args: type=b200,master_clock_rate=23.04e6
[INFO] [B200] Detected Device: B210
[INFO] [B200] Operating over USB 3.
[INFO] [B200] Initialize CODEC control...
[INFO] [B200] Initialize Radio control...
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Asking for clock rate 23.040000 MHz...
[INFO] [B200] Actually got clock rate 23.040000 MHz.
Waiting PHY to initialize ... done!
Attaching UE...
Searching cell in DL EARFCN=3400, f_dl=2685.0 MHz, f_ul=2565.0 MHz
.
Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=0.1 KHz
Found PLMN:  Id=00101, TAC=7
Random Access Transmission: seq=40, ra-rnti=0x2
Random Access Transmission: seq=5, ra-rnti=0x2
Random Access Complete.     c-rnti=0x67, ta=8
RRC Connected
Network attach successful. IP: 172.16.0.4
Software Radio Systems LTE (srsLTE)
Received RRC Connection Release
RRC IDLE
/home/eupc01/srsLTE/lib/src/phy/phch/ra_dl.c.660: Configuring resource
allocation

.
Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-0.1 KHz
...
Found Cell:  Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-0.4 KHz
The condition lb <= n <= ub (0 <= 11 <= 9) was not met
[/home/eupc01/srsLTE/lib/include/srslte/asn1/asn1_utils.h][753] Decoding
failure.
[/home/eupc01/srsLTE/lib/src/asn1/rrc_asn1.cc][79954] Decoding failure.
[/home/eupc01/srsLTE/lib/src/asn1/rrc_asn1.cc][80019] Decoding failure.
[/home/eupc01/srsLTE/lib/include/srslte/asn1/asn1_utils.h][765] Decoding
failure.
[/home/eupc01/srsLTE/lib/src/asn1/rrc_asn1.cc][80100] Decoding failure.
[/home/eupc01/srsLTE/lib/src/asn1/rrc_asn1.cc][80255] Decoding failure.
[/home/eupc01/srsLTE/lib/src/asn1/rrc_asn1.cc][80230] Decoding failure.
[/home/eupc01/srsLTE/lib/src/asn1/rrc_asn1.cc][80270] Decoding failure.

*And printout from eNB srsLTE:*

Built in Release mode using commit 3d9baeb on branch agent.

---  Software Radio Systems LTE eNodeB  ---

Reading configuration file enb.conf...
[INFO] [UHD] linux; GNU C++ version 5.4.0 20160609; Boost_105800;
UHD_3.14.1.HEAD-0-g98c7c986
[INFO] [B200] Loading firmware image:
/usr/local/share/uhd/images/usrp_b200_fw.hex...
Opening USRP with args: type=b200,master_clock_rate=30.72e6
[INFO] [B200] Detected Device: B200
[INFO] [B200] Loading FPGA image:
/usr/local/share/uhd/images/usrp_b200_fpga.bin...
[INFO] [B200] Operating over USB 3.
[INFO] [B200] Detecting internal GPSDO....
[INFO] [GPS] No GPSDO found
[INFO] [B200] Initialize CODEC control...
[INFO] [B200] Initialize Radio control...
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Asking for clock rate 30.720000 MHz...
[INFO] [B200] Actually got clock rate 30.720000 MHz.
Setting frequency: DL=2685.0 Mhz, UL=2565.0 MHz
[INFO] [B200] Asking for clock rate 11.520000 MHz...
[INFO] [B200] Actually got clock rate 11.520000 MHz.
Setting Sampling frequency 11.52 MHz

==== eNodeB started ===
Type <t> to view trace
RACH:  tti=1151, preamble=7, offset=3, temp_crnti=0x46
RACH:  tti=1151, preamble=10, offset=8, temp_crnti=0x49
RACH:  tti=1151, preamble=13, offset=13, temp_crnti=0x4c
Disconnecting rnti=0x46.
Disconnecting rnti=0x4c.
User 0x49 connected
Disconnecting rnti=0x49.
RACH:  tti=5081, preamble=44, offset=3, temp_crnti=0x4f
RACH:  tti=5081, preamble=47, offset=8, temp_crnti=0x52
Disconnecting rnti=0x4f.
Disconnecting rnti=0x52.
RACH:  tti=1951, preamble=35, offset=3, temp_crnti=0x55
RACH:  tti=1951, preamble=38, offset=8, temp_crnti=0x58
RACH:  tti=1951, preamble=41, offset=13, temp_crnti=0x5b
RACH:  tti=1971, preamble=0, offset=8, temp_crnti=0x5e
Disconnecting rnti=0x55.
Disconnecting rnti=0x58.
Disconnecting rnti=0x5b.
User 0x5e connected
RACH:  tti=6911, preamble=40, offset=8, temp_crnti=0x61
RACH:  tti=6911, preamble=43, offset=13, temp_crnti=0x64
Disconnecting rnti=0x61.
RACH:  tti=6961, preamble=5, offset=8, temp_crnti=0x67
Disconnecting rnti=0x64.
User 0x67 connected
Disconnecting rnti=0x5e.
Disconnecting rnti=0x67.

czw., 19 wrz 2019 o 10:16 Andre Puschmann <
andre.puschmann at softwareradiosystems.com> napisał(a):

> Hi,
>
> On 18/9/19 15:09, Piotr Kulesza wrote:
> > Hi,
> >
> > I'm trying to connect my UE created via srsue to the internet. UE and
> > eNB are able to see each other and I am able to ping them. For now I
> > have done this:
> > 1) I installed resolvconf and I saved in a
> > file/etc/resolvconf/resolv.conf.d/headwhat follows:
> > nameserver 8.8.4.4
> > nameserver 8.8.8.8
> > 2) I started ./srsepc_if_masq.sh <My Interface connected to Internet>
> >
> > Do I have to do anything else to connect to the Internet through the UE?
> > Any additional changes to the configuration files?
>
> No. Once you have a connection to the core it's all fine on the LTE
> side. From now on, it's a Linux IP routing issue.
>
> Note that the default route for IPs outside of your LTE network is
> probably going through Wifi or Ethernet and not through the tun that the
> UE creates.
>
> Make sure that the default route is over the tun. If you are not
> familiar with route and friend, try disabling all other network
> connections.
>
> Cheers
> Andre
>
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