Change in osmo-gsm-tester[master]: srs_{ue, enb}: change UHD stream args and buffer size as function of c...

[srs_andre]

srs_andre has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-gsm-tester/+/17650 )


Change subject: srs_{ue,enb}: change UHD stream args and buffer size as function of cell width
......................................................................

srs_{ue,enb}: change UHD stream args and buffer size as function of cell width

Change-Id: I2de0526ee9bd2f7bb75c7d529b3f52d75117c5cc
---
M src/osmo_gsm_tester/srs_enb.py
M src/osmo_gsm_tester/srs_ue.py
2 files changed, 34 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-gsm-tester refs/changes/50/17650/1

diff --git a/src/osmo_gsm_tester/srs_enb.py b/src/osmo_gsm_tester/srs_enb.py
index 8cb612e..6193749 100644
--- a/src/osmo_gsm_tester/srs_enb.py
+++ b/src/osmo_gsm_tester/srs_enb.py
@@ -219,6 +219,24 @@
                         + ',id=enb,base_srate=' + str(base_srate)
             config.overlay(values, dict(enb=dict(rf_dev_args=rf_dev_args)))
 
+        # Set UHD frame size as a function of the cell bandwidth
+        if self._conf.get('rf_dev_type') == 'UHD':
+            rf_dev_args = ''
+
+            if self._num_prb < 25:
+                rf_dev_args += 'send_frame_size=512,recv_frame_size=512'
+            elif self._num_prb == 25:
+                rf_dev_args += 'send_frame_size=1024,recv_frame_size=1024'
+            elif self._num_prb > 25:
+                rf_dev_args += 'num_recv_frames=64,num_send_frames=64'
+
+            if self._num_prb > 50:
+                # Reduce over the wire format to sc12
+                rf_dev_args += ',otw_format=sc12'
+
+            config.overlay(values, dict(enb=dict(rf_dev_args=rf_dev_args)))
+
+
         self.dbg('srsENB ' + filename + ':\n' + pprint.pformat(values))
 
         with open(path, 'w') as f:
diff --git a/src/osmo_gsm_tester/srs_ue.py b/src/osmo_gsm_tester/srs_ue.py
index 6cd7c63..920863e 100644
--- a/src/osmo_gsm_tester/srs_ue.py
+++ b/src/osmo_gsm_tester/srs_ue.py
@@ -237,6 +237,22 @@
                                                             + ',id=ue,base_srate='+ str(base_srate)
                                                 )))
 
+        # Set UHD frame size as a function of the cell bandwidth
+        if self._conf.get('rf_dev_type') == 'UHD':
+            rf_dev_args = ''
+            if self.enb.num_prb() < 25:
+                rf_dev_args += 'send_frame_size=512,recv_frame_size=512'
+            elif self.enb.num_prb() == 25:
+                rf_dev_args += 'send_frame_size=1024,recv_frame_size=1024'
+            elif self.enb.num_prb() > 50:
+                rf_dev_args += 'num_recv_frames=64,num_send_frames=64'
+
+            # For 15 and 20 MHz, further reduce over the wire format to sc12
+            if self.enb.num_prb() >= 75:
+                rf_dev_args += ',otw_format=sc12'
+
+            config.overlay(values, dict(ue=dict(rf_dev_args=rf_dev_args)))
+
         self.dbg('SRSUE CONFIG:\n' + pprint.pformat(values))
 
         with open(self.config_file, 'w') as f:

-- 
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Gerrit-Project: osmo-gsm-tester
Gerrit-Branch: master
Gerrit-Change-Id: I2de0526ee9bd2f7bb75c7d529b3f52d75117c5cc
Gerrit-Change-Number: 17650
Gerrit-PatchSet: 1
Gerrit-Owner: srs_andre <andre at softwareradiosystems.com>
Gerrit-MessageType: newchange
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