Intra-eNB and s1 handover

[Mohammed24699]

Intra-eNB and s1 handover

[Mohammed24699]

I can do the intra handover without any issue.

[pgawlowicz]

you need to put your configs to /root/.config/srsran/ or start with sudo srsenb ./enb.conf

[Mohammed24699]

[pgawlowicz]

Is the config file on this directory?

[Mohammed24699]

Thank you, that's my bad. It worked.

Now I had issue with ue,

[pgawlowicz]

sudo srsue ./ue.conf --rat......

[Mohammed24699]

Do I need to change anything in the ue config file ??

[Mohammed24699]

I make the line 27 as comment. I think it worked. Let me know if I am doing it in the right way.

[pgawlowicz]

There was a change in the config structure.

For the ZMQ-based setup, it does not matter, you can comment out this parameter.

But if you want to run over usrp, you need to set it with rat.eutra.dl_earfcn (check here : https://github.com/srsran/srsRAN_4G/blob/master/srsue/src/main.cc#L130), so that the TX/RX freq are set correctly.

[Mohammed24699]

I want to use usrp in future.
I checked that config files of rnb, rr, enb and they are same as the documentation. I am still getting the error. How can I solve it.

[pgawlowicz]

Did you comment out the dl_earfcn line in the config file?

[Mohammed24699]

It worked when I comment out the dl_earfcn line.

[pgawlowicz]

We will update the configs in the tutorial

[Mohammed24699]

Sure

[Mohammed24699]

Hi, I'm trying s1 handover now and I'm facing issues. Let me tell you the step by step process what i did so that you can correct me where i went wrong.

1. Changed the tac value to 7 in mme.yaml file of open 5gc.
   

2. Added subscriber to the network
   

3. added usim credentials to the ue config file
   
   

4. changed mme address in enb config file.
   

5. changed rr1 and rr2 config files according to the documentation.

6. Attached the bash scripts to the config files of enb1, enb2 and UE

7. Initiated eNB. But got errors
   

Attaching the config files here
enb.txt
enb1.txt
enb2.txt
rr1.txt
rr2.txt

[pgawlowicz]

you should remove (or comment out) this part in your configs:

LOG_ARGS="--log.all_level=debug"

PORT_ARGS="tx_port=tcp://*:2101,rx_port=tcp://localhost:2100"
ZMQ_ARGS="--rf.device_name=zmq --rf.device_args=\"${PORT_ARGS},id=enb,base_srate=23.04e6\""

OTHER_ARGS="--enb_files.rr_config=rr1.conf"

sudo srsenb enb.conf ${LOG_ARGS} ${ZMQ_ARGS} ${OTHER_ARGS} $@

[Mohammed24699]

I couldn't able to open two eNB's in the same time. I tried changng the port numbers in the eNB config files but it showing this error.

but the eNB1 is started.

[Mohammed24699]

here I'm attaching the config files
enb1.txt
enb2.txt

[pgawlowicz]

you cannot use the same zmq ports in the two enb, and there is no sib anr rr configs in your working directory.

[Mohammed24699]

I figured it out that we need to run the bash file first. Now, UE is not connecting to rrc.

[pgawlowicz]

could you share open5gs config and logs?

[Mohammed24699]

config.tar.gz
log.tar.gz

please have a look

[pgawlowicz]

in MME logs you have:

04/23 14:51:15.334: [mme] INFO: [Added] Number of eNBs is now 1 (../src/mme/mme-context.c:2829)
04/23 14:51:15.334: [mme] INFO: eNB-S1[127.0.1.1] max_num_of_ostreams : 30 (../src/mme/mme-sm.c:150)
04/23 14:51:15.335: [mme] WARNING: S1-Setup failure: (../src/mme/s1ap-handler.c:234)
04/23 14:51:15.335: [mme] WARNING:     Cannot find Served TAI. Check 'mme.tai' configuration (../src/mme/s1ap-handler.c:235)
04/23 14:51:15.336: [mme] INFO: eNB-S1[127.0.1.1] connection refused!!! (../src/mme/mme-sm.c:166)
04/23 14:51:15.336: [mme] INFO: [Removed] Number of eNBs is now 0 (../src/mme/mme-context.c:2863)

So there is TAI mismatch between enb and open5gs configs.