rf_blade_imp.c.456: RX failed: Operation timed out

[allanjinhui]

I run the srsLTE UE on the BladeRF, and always meet this "time out" error.

---

Opening bladeRF... Set RX sampling rate 1.92 Mhz, filter BW: 1.92 Mhz Waiting PHY to initialize ... done! Attaching UE... Searching cell in DL EARFCN=3400, f_dl=2685.0 MHz, f_ul=2565.0 MHz set RX frequency to 2684999998 set TX frequency to 2564999998 Set RX sampling rate 1.92 Mhz, filter BW: 1.92 Mhz . Found Cell: Mode=FDD, PCI=1, PRB=50, Ports=1, CFO=-4.0 KHz Set RX sampling rate 15.36 Mhz, filter BW: 12.29 Mhz /srsLTE/lib/src/phy/rf/rf_blade_imp.c.456: RX failed: Operation timed out

SYNC: Receiving from radio while in IDLE_RX /srsLTE/lib/src/phy/rf/rf_blade_imp.c.456: RX failed: Operation timed out

/srsLTE/lib/src/phy/ue/ue_sync.c.727: Error receiving samples

/srsLTE/lib/src/phy/rf/rf_blade_imp.c.456: RX failed: Operation timed out

SYNC: Receiving from radio while in IDLE_RX Set RX sampling rate 1.92 Mhz, filter BW: 1.92 Mhz

[xavierarteaga]

This issue was introduce in srsLTE after a big refactor. It will be fix for the next release. You can use the following patch:

diff --git a/lib/src/radio/radio.cc b/lib/src/radio/radio.cc
index 8d02950c8..a90b947cb 100644
--- a/lib/src/radio/radio.cc
+++ b/lib/src/radio/radio.cc
@@ -277,9 +277,9 @@ double radio::set_rx_gain_th(float gain)
 void radio::set_master_clock_rate(double rate)
 {
   if (rate != master_clock_rate) {
-    srslte_rf_stop_rx_stream(&rf_device);
+//    srslte_rf_stop_rx_stream(&rf_device);
     srslte_rf_set_master_clock_rate(&rf_device, rate);
-    srslte_rf_start_rx_stream(&rf_device, false);
+//    srslte_rf_start_rx_stream(&rf_device, false);
     master_clock_rate = rate;
   }
 }

Thanks.

[sodaBitters]

This issue still occurs with the current srsLTE and bladeRF builds.. I don't believe @xavierarteaga patch is still applicable. I get the same error for srsUE as @allanjinhui :

Opening bladeRF... Set RX sampling rate 1.92 Mhz, filter BW: 1.92 Mhz Waiting PHY to initialize ... done! Attaching UE... Searching cell in DL EARFCN=3400, f_dl=2685.0 MHz, f_ul=2565.0 MHz set RX frequency to 2684999998 set TX frequency to 2564999998 Set RX sampling rate 1.92 Mhz, filter BW: 1.92 Mhz /srsLTE/lib/src/phy/rf/rf_blade_imp.c.428: RX failed: Operation timed out; nsamples=9600;

/srsLTE/lib/src/phy/ue/ue_sync.c.728: Error receiving samples

/srsLTE/lib/src/phy/ue/ue_cell_search.c.309: Error calling srslte_ue_sync_work()

/srsLTE/lib/src/phy/ue/ue_cell_search.c.268: Error searching cell

/srsLTE/lib/src/phy/rf/rf_blade_imp.c.428: RX failed: Operation timed out; nsamples=1920;

SYNC: Receiving from radio while in IDLE_RX /srsLTE/lib/src/phy/rf/rf_blade_imp.c.428: RX failed: An unexpected error occurred; nsamples=1920;

SYNC: Receiving from radio while in IDLE_RX /srsLTE/lib/src/phy/rf/rf_blade_imp.c.428: RX failed: An unexpected error occurred; nsamples=1920;

SYNC: Receiving from radio while in IDLE_RX /srsLTE/lib/src/phy/rf/rf_blade_imp.c.428: RX failed: An unexpected error occurred; nsamples=1920;

[lcr1017]

same problem