get CSI-RS

CMakeLists.txt

@@ -1898,6 +1898,8 @@ add_executable(nr-uesoftmodem
   ${rrc_h}
   ${s1ap_h}
   ${OPENAIR_DIR}/executables/nr-uesoftmodem.c
+  ${OPENAIR_DIR}/executables/extract_csi_rs.c
+  ${OPENAIR_DIR}/executables/cJSON.c
   ${OPENAIR_DIR}/executables/position_interface.c
   ${OPENAIR_DIR}/executables/nr-ue.c
   ${OPENAIR_DIR}/executables/nr-ue-ru.c
@@ -1912,6 +1914,7 @@ target_link_libraries(nr-uesoftmodem PRIVATE
   PHY_COMMON PHY_NR_COMMON PHY_NR_UE NR_L2_UE MAC_NR_COMMON NFAPI_LIB
   ITTI SIMU radio_common
   time_management softmodem_common
+  microhttpd # apt install libmicrohttpd-dev 
   -Wl,--end-group z dl)
 
 target_link_libraries(nr-uesoftmodem PRIVATE pthread m CONFIG_LIB rt nr_ue_phy_meas)

cmake_targets/tools/build_helper

@@ -467,7 +467,8 @@ check_install_oai_software() {
 	openssl \
 	zlib1g-dev \
 	xxd \
-	libyaml-cpp-dev
+	libyaml-cpp-dev \
+	libmicrohttpd-dev
 
   elif [[ "$OS_BASEDISTRO" == "fedora" ]]; then
     if [[ "$OS_DISTRO" == "rhel" ]] || [[ "$OS_DISTRO" == "centos" ]] || [[ "$OS_DISTRO" == "rocky" ]]; then

executables/extract_csi_rs.h

+#ifndef HTTP_SERVER_H_
+#define HTTP_SERVER_H_
+
+int start_csi_http_server();
+void stop_csi_http_server();
+void get_csi_save_path(char *out, int len);
+int get_csi_recording_enabled();
+
+#endif /* HTTP_SERVER_H_ */

executables/nr-uesoftmodem.c

@@ -29,6 +29,7 @@
 #include "NR_IF_Module.h"
 #include "openair1/SIMULATION/TOOLS/sim.h"
 #include "openair2/RRC/NR_UE/L2_interface_ue.h"
+#include "executables/extract_csi_rs.h"
 
 #ifdef SMBV
 #include "PHY/TOOLS/smbv.h"
@@ -442,6 +443,8 @@ int main(int argc, char **argv)
     init_NR_UE_threads(PHY_vars_UE_g[inst][0]);
   }
 
+  start_csi_http_server();
+
   // wait for end of program
   printf("TYPE <CTRL-C> TO TERMINATE\n");
 
@@ -457,6 +460,8 @@ int main(int argc, char **argv)
   LOG_W(NR_PHY, "Returned from ITTI signal handler\n");
   oai_exit = 1;
 
+  stop_csi_http_server();
+
   if (PHY_vars_UE_g && PHY_vars_UE_g[0]) {
     for (int CC_id = 0; CC_id < MAX_NUM_CCs; CC_id++) {
       PHY_VARS_NR_UE *phy_vars = PHY_vars_UE_g[0][CC_id];

openair1/PHY/NR_UE_TRANSPORT/csi_rx.c

@@ -15,12 +15,14 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/time.h>
 
 #include "executables/nr-softmodem-common.h"
 #include "nr_transport_proto_ue.h"
 #include "PHY/NR_REFSIG/nr_refsig.h"
 #include "common/utils/nr/nr_common.h"
 #include "PHY/NR_UE_ESTIMATION/filt16a_32.h"
+#include "executables/extract_csi_rs.h"
 
 // Additional memory allocation, because of applying the filter and the memory offset to ensure memory alignment
 #define FILTER_MARGIN 32
@@ -943,6 +945,46 @@ void nr_ue_csi_rs_procedures(PHY_VARS_NR_UE *ue,
       nr_csi_rs_cqi_estimation(precoded_sinr_dB, &cqi);
   }
 
+  if(get_csi_recording_enabled()) {
+    if (csirs_config_pdu->measurement_bitmap > 0) {
+      char file_name_path[64] = {0};
+      get_csi_save_path(file_name_path,64);
+      char buf[64];
+      struct timeval tv;
+      gettimeofday(&tv, NULL);
+      struct tm tm;
+      localtime_r(&tv.tv_sec, &tm);
+
+      snprintf(buf, sizeof(buf),
+              "%04d%02d%02d_%02d%02d%02d_%03ld",
+              tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday,
+              tm.tm_hour, tm.tm_min, tm.tm_sec,
+              tv.tv_usec / 1000);
+
+      char file_name_generate[256] = {0};
+      sprintf(file_name_generate,"%scsi_rs_generate_%s.bin",file_name_path,buf);
+      FILE *file_generate;
+      file_generate = fopen(file_name_generate, "wb");
+      for (int m = 0; m < frame_parms->nb_antennas_rx; m++) {
+        fwrite(csi_info->csi_rs_generated_signal[m], sizeof(c16_t), frame_parms->samples_per_slot_wCP, file_generate);
+      }
+      fclose(file_generate);
+
+      char file_name_get[256] = {0};
+      sprintf(file_name_get,"%scsi_rs_get_%s.bin",file_name_path,buf);
+      FILE *file_get;
+      file_get = fopen(file_name_get, "wb");
+      for (int m = 0; m < frame_parms->nb_antennas_rx; m++) {
+        fwrite(csi_rs_received_signal[m],sizeof(c16_t), frame_parms->samples_per_slot_wCP, file_get);
+      }
+      fclose(file_get);
+      
+      // LOG_I(NR_PHY, "************ [frame_parms->nb_antennas_rx %d] [frame_parms->samples_per_slot_wCP %d]\n", frame_parms->nb_antennas_rx, frame_parms->samples_per_slot_wCP);
+      
+      // LOG_I(NR_PHY, "CSI-RS measurement_bitmap %d\n",csirs_config_pdu->measurement_bitmap);
+    }
+  }
+
   switch (csirs_config_pdu->measurement_bitmap) {
     case 1 :
       LOG_I(NR_PHY, "[UE %d] RSRP = %i dBm\n", ue->Mod_id, rsrp_dBm);

targets/PROJECTS/GENERIC-NR-5GC/CONF/ue.conf

-# SPDX-License-Identifier: LicenseRef-CSSL-1.0
-
 uicc0 = {
-imsi = "2089900007487";
-key = "fec86ba6eb707ed08905757b1bb44b8f";
-opc= "C42449363BBAD02B66D16BC975D77CC1";
-pdu_sessions = ({ dnn = "oai"; nssai_sst = 1; });
-}
-
-position0 = {
-    x = 0.0;
-    y = 0.0;
-    z = 6377900.0;
+imsi = "466920000000001";
+key = "00112233445566778899AABBCCDDEEFF";
+opc= "000102030405060708090A0B0C0D0E0F";
+pdu_sessions = ({ dnn = "internet"; nssai_sst = 1; nssai_sd=0xFFFFFF;});
+#dnn= "internet";
+#nssai_sst=1;
+#nssai_sd=0xFFFFFF;
 }
 
-@include "channelmod_rfsimu_LEO_satellite.conf"
+#position0 = {
+#    x = 0.0;
+#    y = 0.0;
+#    z = 6377900.0;
+#}
+#
+#@include "channelmod_rfsimu_LEO_satellite.conf"