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srsran / srsRAN_4G

Open source SDR 4G software suite from Software Radio Systems (SRS) https://docs.srsran.com/projects/4g
https://www.srsran.com
GNU Affero General Public License v3.0
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Sounding reference signal is not support？ #250

Closed liychee closed 5 years ago

liychee commented 5 years ago

Hi, I am confused by some setting about Sounding Reference Signal in the EnodeB. In \srsenb\src\phy.cc line 85: workers_common.pucch_cfg.srs_configured = false;

I know that the SRS is configured in SIB2, but I also cannot find the parameters about SRS such as the srs-Bandwidth or the period of SRS in sib.conf.example？

Does this mean that our srslte does not support Sounding reference signal?

However, I can find the implementation of SRS in the code, such as SRS generation(function : srslte_refsignal_srs_gen). So, how can I do to make this SRS works?

Thank you very very much

ismagom commented 5 years ago

Hi,

SRS is supported in the UE but not in the eNodeB.

El sáb., 13 oct. 2018 15:40, liychee notifications@github.com escribió:

Hi, I am confused by some setting about Sounding Reference Signal in the EnodeB. In \srsenb\src\phy.cc line 85: workers_common.pucch_cfg.srs_configured = false;

I know that the SRS is configured in SIB2, but I also cannot find the parameters about SRS such as the srs-Bandwidth or the period of SRS in sib.conf.example？

Does this mean that our srslte does not support Sounding reference signal?

However, I can find the implementation of SRS in the code, such as SRS generation(function : srslte_refsignal_srs_gen). So, how can I do to make this SRS works?

Thank you very very much

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liychee commented 5 years ago

Thank you, I know that SRS is implemented on the UE side, but it seems that eNodeB is needed to trigger it. In the example, I find that no SRS is triggered in the interaction between eNodeB and UE. How can I configure eNodeB to make UE to send SRS?

liychee commented 5 years ago

Specifically, according to the 36.211,36.213,36.331, the configuration of SRS is in the SIB2 of eNodeB. (SIB2 mainly accomplishes the following configures: rach, bcch, pcch, prach, pdsch, pusch, pucch, SOUNDING, powercontrol configure. )However, in sib. conf, we can find other configurations, except no SOUNDING configuration. At the same time, we also found in enb_cfg_parser.cc that there is also no corresponding parser for SOUNDING configuration. Is this a bug?

andrepuschmann commented 5 years ago

As mentioned above, SRS is currently not supported in the eNB so there is not config option for it.

YuexinZhao commented 5 years ago

When will the SRS function in the eNodeB be implemented? Thanks in advance! @ismagom @andrepuschmann

ArrrNeo commented 5 years ago

I am also looking for setting for enabling SRS. Looks like this bug was closed with a commit. However I am unable to find the related config. Can you please tell if this was implemented from eNB side and what is the config to trigger that.

thanks

andrepuschmann commented 5 years ago

It's not supported in the eNB.

ArrrNeo commented 5 years ago

thanks for the quick reply.

On Tue, May 21, 2019 at 12:14 AM Andre Puschmann notifications@github.com wrote:

It's not supported in the eNB.

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