Merge branch 'develop' into NR_RRC_PRACH_procedures

Conflicts:
	cmake_targets/CMakeLists.txt
	openair2/GNB_APP/gnb_app.c
	openair2/LAYER2/NR_MAC_gNB/gNB_scheduler.c
	openair2/RRC/NR/rrc_gNB_nsa.c

targets/ARCH/rfsimulator/apply_channelmod.c

@@ -34,6 +34,9 @@
 #include <common/utils/LOG/log.h>
 #include <common/config/config_userapi.h>
 #include <openair1/SIMULATION/TOOLS/sim.h>
+#include <common/utils/telnetsrv/telnetsrv.h>
+#include <common/utils/load_module_shlib.h>
+#include <targets/ARCH/rfsimulator/rfsimulator.h>
 
 /*
   Legacy study:
@@ -99,8 +102,8 @@ void rxAddInput( struct complex16 *input_sig, struct complex16 *after_channel_si
       } //l
     }
 
-    out_ptr->r += round(rx_tmp.x*pathLossLinear + noise_per_sample*gaussdouble(0.0,1.0));
-    out_ptr->i += round(rx_tmp.y*pathLossLinear + noise_per_sample*gaussdouble(0.0,1.0));
+    out_ptr->r += round(rx_tmp.x*pathLossLinear + noise_per_sample*gaussZiggurat(0.0,1.0));
+    out_ptr->i += round(rx_tmp.y*pathLossLinear + noise_per_sample*gaussZiggurat(0.0,1.0));
     out_ptr++;
   }
 
@@ -112,3 +115,4 @@ void rxAddInput( struct complex16 *input_sig, struct complex16 *after_channel_si
           channelDesc->path_loss_dB,
           10*log10(noise_per_sample));
 }
+

targets/ARCH/rfsimulator/new_channel_sim.c

@@ -0,0 +1,108 @@
+/*
+* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+* contributor license agreements.  See the NOTICE file distributed with
+* this work for additional information regarding copyright ownership.
+* The OpenAirInterface Software Alliance licenses this file to You under
+* the OAI Public License, Version 1.1  (the "License"); you may not use this file
+* except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.openairinterface.org/?page_id=698
+*
+* Author and copyright: Laurent Thomas, open-cells.com
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*-------------------------------------------------------------------------------
+* For more information about the OpenAirInterface (OAI) Software Alliance:
+*      contact@openairinterface.org
+*/
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdbool.h>
+#include <errno.h>
+
+
+#include <common/utils/assertions.h>
+#include <common/utils/LOG/log.h>
+#include <common/config/config_userapi.h>
+#include <openair1/SIMULATION/TOOLS/sim.h>
+#include <targets/ARCH/rfsimulator/rfsimulator.h>
+
+// Ziggurat 
+static double wn[128],fn[128];
+static uint32_t iz,jz,jsr=123456789,kn[128];
+static int32_t hz;
+#define SHR3 (jz=jsr, jsr^=(jsr<<13),jsr^=(jsr>>17),jsr^=(jsr<<5),jz+jsr)
+#define UNI (0.5+(signed) SHR3 * 0.2328306e-9)
+
+double nfix(void) {
+  const double r = 3.442620;
+  static double x, y;
+
+  for (;;) {
+    x=hz *  wn[iz];
+
+    if (iz==0) {
+      do {
+        x = - 0.2904764 * log (UNI);
+        y = - log (UNI);
+      } while (y+y < x*x);
+
+      return (hz>0)? r+x : -r-x;
+    }
+
+    if (fn[iz]+UNI*(fn[iz-1]-fn[iz])<exp(-0.5*x*x)) {
+      return x;
+    }
+
+    hz = SHR3;
+    iz = hz&127;
+
+    if (abs(hz) < kn[iz]) {
+      return ((hz)*wn[iz]);
+    }
+  }
+}
+
+/*!\Procedure to create tables for normal distribution kn,wn and fn. */
+
+void tableNor(unsigned long seed) {
+  jsr=seed;
+  double dn = 3.442619855899;
+  int i;
+  const double m1 = 2147483648.0;
+  double q;
+  double tn = 3.442619855899;
+  const double vn = 9.91256303526217E-03;
+  q = vn/exp(-0.5*dn*dn);
+  kn[0] = ((dn/q)*m1);
+  kn[1] = 0;
+  wn[0] =  ( q / m1 );
+  wn[127] = ( dn / m1 );
+  fn[0] = 1.0;
+  fn[127] = ( exp ( - 0.5 * dn * dn ) );
+
+  for ( i = 126; 1 <= i; i-- ) {
+    dn = sqrt (-2.0 * log ( vn/dn + exp(-0.5*dn*dn)));
+    kn[i+1] = ((dn / tn)*m1);
+    tn = dn;
+    fn[i] = (exp (-0.5*dn*dn));
+    wn[i] = (dn / m1);
+  }
+
+  return;
+}
+
+double gaussZiggurat(double mean, double variance) {
+  hz=SHR3;
+  iz=hz&127;
+  return abs(hz)<kn[iz]? hz*wn[iz] : nfix();
+}

targets/ARCH/rfsimulator/rfsimulator.h

@@ -0,0 +1,37 @@
+/*
+* Licensed to the OpenAirInterface (OAI) Software Alliance under one or more
+* contributor license agreements.  See the NOTICE file distributed with
+* this work for additional information regarding copyright ownership.
+* The OpenAirInterface Software Alliance licenses this file to You under
+* the OAI Public License, Version 1.1  (the "License"); you may not use this file
+* except in compliance with the License.
+* You may obtain a copy of the License at
+*
+*      http://www.openairinterface.org/?page_id=698
+*
+* Author and copyright: Laurent Thomas, open-cells.com
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+*-------------------------------------------------------------------------------
+* For more information about the OpenAirInterface (OAI) Software Alliance:
+*      contact@openairinterface.org
+*/
+
+#ifndef __RFSIMULATOR_H
+#define  __RFSIMULATOR_H
+double gaussZiggurat(double mean, double variance);
+void tableNor(unsigned long seed);
+void rxAddInput( struct complex16 *input_sig,
+                 struct complex16 *after_channel_sig,
+                 int rxAnt,
+                 channel_desc_t *channelDesc,
+                 int nbSamples,
+                 uint64_t TS,
+                 uint32_t CirSize
+               );
+
+#endif

targets/ARCH/rfsimulator/simulator.c

@@ -50,6 +50,7 @@
 #include "openair1/PHY/defs_UE.h"
 #define CHANNELMOD_DYNAMICLOAD
 #include <openair1/SIMULATION/TOOLS/sim.h>
+#include <targets/ARCH/rfsimulator/rfsimulator.h>
 
 #define PORT 4043 //default TCP port for this simulator
 #define CirSize 307200 // 100ms is enough
@@ -146,6 +147,12 @@ void allocCirBuf(rfsimulator_state_t *bridge, int sock) {
     // the value channel_model->path_loss_dB seems only a storage place (new_channel_desc_scm() only copy the passed value)
     // Legacy changes directlty the variable channel_model->path_loss_dB place to place
     // while calling new_channel_desc_scm() with path losses = 0
+    static bool init_done=false;
+    if (!init_done) {
+      randominit(0);
+      tableNor(0);
+      init_done=true;
+    }
     ptr->channel_model=new_channel_desc_scm(bridge->tx_num_channels,bridge->rx_num_channels,
                                             bridge->channelmod,
                                             bridge->sample_rate,
@@ -561,6 +568,7 @@ int rfsimulator_read(openair0_device *device, openair0_timestamp *ptimestamp, vo
       pthread_mutex_unlock(&Sockmutex);
       usleep(10000);
       pthread_mutex_lock(&Sockmutex);
+
       if ( t->lastWroteTS < t->nextTimestamp ) {
         // Assuming Tx is not done fully in another thread
         // We can never write is the past from the received time
@@ -574,6 +582,7 @@ int rfsimulator_read(openair0_device *device, openair0_timestamp *ptimestamp, vo
 
         for ( int i=0; i < t->tx_num_channels; i++)
           samplesVoid[i]=(void *)&v;
+
 	LOG_I(HW, "No samples Tx occured, so we send 1 sample to notify it: Tx:%lu, Rx:%lu\n",
 	      t->lastWroteTS, t->nextTimestamp);
         rfsimulator_write_internal(t, t->nextTimestamp,
@@ -716,7 +725,7 @@ int device_init(openair0_device *device, openair0_config_t *openair0_cfg) {
   rfsimulator->rx_num_channels=openair0_cfg->rx_num_channels;
   rfsimulator->sample_rate=openair0_cfg->sample_rate;
   rfsimulator->tx_bw=openair0_cfg->tx_bw;
-  randominit(0);
+  //randominit(0);
   set_taus_seed(0);
   return 0;
 }