diff --git a/lib/include/srslte/asn1/rrc_nr_utils.h b/lib/include/srslte/asn1/rrc_nr_utils.h
index 716aefca6..8530a7435 100644
--- a/lib/include/srslte/asn1/rrc_nr_utils.h
+++ b/lib/include/srslte/asn1/rrc_nr_utils.h
@@ -13,6 +13,8 @@
 #ifndef SRSLTE_RRC_NR_UTILS_H
 #define SRSLTE_RRC_NR_UTILS_H
 
+#include "srslte/interfaces/pdcp_interface_types.h"
+#include "srslte/interfaces/rlc_interface_types.h"
 #include "srslte/interfaces/rrc_interface_types.h"
 #include "srslte/interfaces/sched_interface.h"
 
@@ -24,6 +26,8 @@ namespace rrc_nr {
 
 struct plmn_id_s;
 struct sib1_s;
+struct rlc_cfg_c;
+struct pdcp_cfg_s;
 
 } // namespace rrc_nr
 } // namespace asn1
@@ -36,6 +40,16 @@ namespace srslte {
 plmn_id_t make_plmn_id_t(const asn1::rrc_nr::plmn_id_s& asn1_type);
 void      to_asn1(asn1::rrc_nr::plmn_id_s* asn1_type, const plmn_id_t& cfg);
 
+/***************************
+ *      RLC Config
+ **************************/
+rlc_config_t make_rlc_config_t(const asn1::rrc_nr::rlc_cfg_c& asn1_type);
+
+/***************************
+ *      PDCP Config
+ **************************/
+pdcp_config_t make_drb_pdcp_config_t(const uint8_t bearer_id, bool is_ue, const asn1::rrc_nr::pdcp_cfg_s& pdcp_cfg);
+
 } // namespace srslte
 
 namespace srsenb {
diff --git a/lib/include/srslte/interfaces/rlc_interface_types.h b/lib/include/srslte/interfaces/rlc_interface_types.h
index cc2e0b2e7..8679f360d 100644
--- a/lib/include/srslte/interfaces/rlc_interface_types.h
+++ b/lib/include/srslte/interfaces/rlc_interface_types.h
@@ -216,7 +216,7 @@ public:
     } else if (sn_size == 12) {
       cnfg.um_nr.sn_field_length = rlc_um_nr_sn_size_t::size12bits;
       cnfg.um_nr.UM_Window_Size  = 2048;
-      cnfg.um_nr.mod             = 64;
+      cnfg.um_nr.mod             = 4096;
     } else {
       return {};
     }
diff --git a/lib/src/asn1/rrc_nr_utils.cc b/lib/src/asn1/rrc_nr_utils.cc
index 18b8195ae..ba44ed40e 100644
--- a/lib/src/asn1/rrc_nr_utils.cc
+++ b/lib/src/asn1/rrc_nr_utils.cc
@@ -13,10 +13,13 @@
 #include "srslte/asn1/rrc_nr_utils.h"
 #include "srslte/asn1/rrc_nr.h"
 #include "srslte/config.h"
+#include "srslte/interfaces/pdcp_interface_types.h"
+#include "srslte/interfaces/rlc_interface_types.h"
 #include <algorithm>
 
 namespace srslte {
 
+using namespace asn1::rrc_nr;
 /***************************
  *        PLMN ID
  **************************/
@@ -47,6 +50,82 @@ void to_asn1(asn1::rrc_nr::plmn_id_s* asn1_type, const plmn_id_t& cfg)
   std::copy(&cfg.mnc[0], &cfg.mnc[cfg.nof_mnc_digits], &asn1_type->mnc[0]);
 }
 
+rlc_config_t make_rlc_config_t(const rlc_cfg_c& asn1_type)
+{
+  rlc_config_t rlc_cfg = rlc_config_t::default_rlc_um_nr_config();
+  rlc_cfg.rat = srslte_rat_t::nr;
+  switch (asn1_type.type().value) {
+    case rlc_cfg_c::types_opts::am:
+      break;
+    case rlc_cfg_c::types_opts::um_bi_dir:
+    case rlc_cfg_c::types_opts::um_uni_dir_dl:
+    case rlc_cfg_c::types_opts::um_uni_dir_ul:
+      rlc_cfg.rlc_mode              = rlc_mode_t::um;
+      rlc_cfg.um_nr.t_reassembly_ms = asn1_type.um_bi_dir().dl_um_rlc.t_reassembly.value;
+      rlc_cfg.um_nr.sn_field_length = (rlc_um_nr_sn_size_t)asn1_type.um_bi_dir().dl_um_rlc.sn_field_len.value;
+      rlc_cfg.um_nr.mod             = (rlc_cfg.um_nr.sn_field_length == rlc_um_nr_sn_size_t::size6bits) ? 64 : 4096;
+      rlc_cfg.um_nr.UM_Window_Size  = (rlc_cfg.um_nr.sn_field_length == rlc_um_nr_sn_size_t::size6bits) ? 32 : 2048;
+      break;
+    default:
+      break;
+  }
+  return rlc_cfg;
+}
+
+srslte::pdcp_config_t make_drb_pdcp_config_t(const uint8_t bearer_id, bool is_ue, const pdcp_cfg_s& pdcp_cfg)
+{
+  // TODO: complete config processing
+  // TODO: check if is drb_cfg.pdcp_cfg.drb_present if not return Error
+  // TODO: different pdcp sn size for ul and dl
+  pdcp_discard_timer_t discard_timer = pdcp_discard_timer_t::infinity;
+  if (pdcp_cfg.drb.discard_timer_present) {
+    switch (pdcp_cfg.drb.discard_timer.to_number()) {
+      case 10:
+        discard_timer = pdcp_discard_timer_t::ms10;
+        break;
+      case 100:
+        discard_timer = pdcp_discard_timer_t::ms100;
+        break;
+      default:
+        discard_timer = pdcp_discard_timer_t::infinity;
+        break;
+    }
+  }
+
+  pdcp_t_reordering_t t_reordering = pdcp_t_reordering_t::ms500;
+  if (pdcp_cfg.t_reordering_present) {
+    switch (pdcp_cfg.t_reordering.to_number()) {
+      case 0:
+        t_reordering = pdcp_t_reordering_t::ms0;
+        break;
+      default:
+        t_reordering = pdcp_t_reordering_t::ms500;
+    }
+  }
+
+  uint8_t sn_len = srslte::PDCP_SN_LEN_12;
+  if (pdcp_cfg.drb.pdcp_sn_size_dl_present) {
+    switch (pdcp_cfg.drb.pdcp_sn_size_dl.value) {
+      case pdcp_cfg_s::drb_s_::pdcp_sn_size_dl_opts::options::len12bits:
+        sn_len = srslte::PDCP_SN_LEN_12;
+        break;
+      case pdcp_cfg_s::drb_s_::pdcp_sn_size_dl_opts::options::len18bits:
+        sn_len = srslte::PDCP_SN_LEN_18;
+      default:
+        break;
+    }
+  }
+
+  pdcp_config_t cfg(bearer_id,
+                    PDCP_RB_IS_DRB,
+                    is_ue ? SECURITY_DIRECTION_UPLINK : SECURITY_DIRECTION_DOWNLINK,
+                    is_ue ? SECURITY_DIRECTION_DOWNLINK : SECURITY_DIRECTION_UPLINK,
+                    sn_len,
+                    t_reordering,
+                    discard_timer);
+  return cfg;
+}
+
 } // namespace srslte
 
 namespace srsenb {
diff --git a/lib/test/asn1/CMakeLists.txt b/lib/test/asn1/CMakeLists.txt
index 05c297dd4..cc3a0a54f 100644
--- a/lib/test/asn1/CMakeLists.txt
+++ b/lib/test/asn1/CMakeLists.txt
@@ -54,6 +54,10 @@ if (ENABLE_5GNR)
     add_executable(ngap_asn1_test ngap_test.cc)
     target_link_libraries(ngap_asn1_test ngap_nr_asn1 srslte_common)
     add_test(ngap_asn1_test ngap_asn1_test)
+
+    add_executable(rrc_nr_utils_test rrc_nr_utils_test.cc)
+    target_link_libraries(rrc_nr_utils_test ngap_nr_asn1 srslte_common rrc_nr_asn1)
+    add_test(rrc_nr_utils_test rrc_nr_utils_test)
 endif(ENABLE_5GNR)
 
 add_executable(rrc_asn1_decoder rrc_asn1_decoder.cc)
diff --git a/lib/test/asn1/rrc_nr_utils_test.cc b/lib/test/asn1/rrc_nr_utils_test.cc
new file mode 100644
index 000000000..085e0bf27
--- /dev/null
+++ b/lib/test/asn1/rrc_nr_utils_test.cc
@@ -0,0 +1,53 @@
+/**
+ *
+ * \section COPYRIGHT
+ *
+ * Copyright 2013-2021 Software Radio Systems Limited
+ *
+ * By using this file, you agree to the terms and conditions set
+ * forth in the LICENSE file which can be found at the top level of
+ * the distribution.
+ *
+ */
+
+#include <getopt.h>
+#include <iostream>
+
+#include "srslte/asn1/rrc_nr.h"
+#include "srslte/asn1/rrc_nr_utils.h"
+#include "srslte/common/common.h"
+#include "srslte/common/log.h"
+#include "srslte/common/logmap.h"
+#include "srslte/common/test_common.h"
+
+using namespace srslte;
+
+int test_rlc_config()
+{
+  asn1::rrc_nr::rlc_cfg_c rlc_cfg_asn1;
+  rlc_cfg_asn1.set_um_bi_dir();
+  rlc_cfg_asn1.um_bi_dir().dl_um_rlc.sn_field_len_present = true;
+  rlc_cfg_asn1.um_bi_dir().dl_um_rlc.sn_field_len         = asn1::rrc_nr::sn_field_len_um_e::size12;
+  rlc_cfg_asn1.um_bi_dir().dl_um_rlc.t_reassembly         = asn1::rrc_nr::t_reassembly_e::ms50;
+  rlc_cfg_asn1.um_bi_dir().ul_um_rlc.sn_field_len_present = true;
+  rlc_cfg_asn1.um_bi_dir().ul_um_rlc.sn_field_len         = asn1::rrc_nr::sn_field_len_um_e::size12;
+  asn1::json_writer jw;
+  rlc_cfg_asn1.to_json(jw);
+  logmap::get("RRC")->info_long("RLC NR Config: \n %s \n", jw.to_string().c_str());
+
+  rlc_config_t rlc_cfg = make_rlc_config_t(rlc_cfg_asn1);
+  TESTASSERT(rlc_cfg.rat == srslte_rat_t::nr);
+  TESTASSERT(rlc_cfg.um_nr.sn_field_length == rlc_um_nr_sn_size_t::size12bits);
+  TESTASSERT(rlc_cfg.um_nr.UM_Window_Size == 2048);
+  return SRSLTE_SUCCESS;
+}
+
+int main()
+{
+  srslte::logmap::set_default_log_level(srslte::LOG_LEVEL_DEBUG);
+
+  TESTASSERT(test_rlc_config() == 0);
+
+  printf("Success\n");
+  return 0;
+}