diff --git a/openair2/GNB_APP/RRC_nr_paramsvalues.h b/openair2/GNB_APP/RRC_nr_paramsvalues.h
index 5b77da80b4..be2fd03542 100644
--- a/openair2/GNB_APP/RRC_nr_paramsvalues.h
+++ b/openair2/GNB_APP/RRC_nr_paramsvalues.h
@@ -116,6 +116,7 @@
 #define GNB_CONFIG_STRING_NROFDOWNLINKSYMBOLS                            "nrofDownlinkSymbols"
 #define GNB_CONFIG_STRING_NROFUPLINKSLOTS                                "nrofUplinkSlots"
 #define GNB_CONFIG_STRING_NROFUPLINKSYMBOLS                              "nrofUplinkSymbols"
+#define GNB_CONFIG_STRING_PATTERN2                                       "pattern2"
 #define GNB_CONFIG_STRING_DLULTRANSMISSIONPERIODICITY2                   "dl_UL_TransmissionPeriodicity2"
 #define GNB_CONFIG_STRING_NROFDOWNLINKSLOTS2                             "nrofDownlinkSlots2"
 #define GNB_CONFIG_STRING_NROFDOWNLINKSYMBOLS2                           "nrofDownlinkSymbols2"
@@ -247,11 +248,6 @@
 {GNB_CONFIG_STRING_NROFDOWNLINKSYMBOLS,NULL,0,.i64ptr=&scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofDownlinkSymbols,.defint64val=6,TYPE_INT64,0},\
 {GNB_CONFIG_STRING_NROFUPLINKSLOTS,NULL,0,.i64ptr=&scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSlots,.defint64val=2,TYPE_INT64,0},\
 {GNB_CONFIG_STRING_NROFUPLINKSYMBOLS,NULL,0,.i64ptr=&scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSymbols,.defint64val=4,TYPE_INT64,0},\
-{GNB_CONFIG_STRING_DLULTRANSMISSIONPERIODICITY2,NULL,0,.i64ptr=&scc->tdd_UL_DL_ConfigurationCommon->pattern2->dl_UL_TransmissionPeriodicity,.defintval=-1,TYPE_INT64,0},\
-{GNB_CONFIG_STRING_NROFDOWNLINKSLOTS2,NULL,0,.i64ptr=&scc->tdd_UL_DL_ConfigurationCommon->pattern2->nrofDownlinkSlots,.defint64val=-1,TYPE_INT64,0},\
-{GNB_CONFIG_STRING_NROFDOWNLINKSYMBOLS2,NULL,0,.i64ptr=&scc->tdd_UL_DL_ConfigurationCommon->pattern2->nrofDownlinkSymbols,.defint64val=-1,TYPE_INT64,0},\
-{GNB_CONFIG_STRING_NROFUPLINKSLOTS2,NULL,0,.i64ptr=&scc->tdd_UL_DL_ConfigurationCommon->pattern2->nrofUplinkSlots,.defint64val=-1,TYPE_INT64,0},\
-{GNB_CONFIG_STRING_NROFUPLINKSYMBOLS2,NULL,0,.i64ptr=&scc->tdd_UL_DL_ConfigurationCommon->pattern2->nrofUplinkSymbols,.defint64val=-1,TYPE_INT64,0},\
 {GNB_CONFIG_STRING_SSPBCHBLOCKPOWER,NULL,0,.i64ptr=&scc->ss_PBCH_BlockPower,.defint64val=20,TYPE_INT64,0}, \
 {GNB_CONFIG_STRING_CELLSPECIFICKOFFSET,NULL,0,.i64ptr=scc->ext2->ntn_Config_r17->cellSpecificKoffset_r17,.defint64val=0,TYPE_INT64,0}, \
 {GNB_CONFIG_STRING_EPHEMERIS_POSITION_X,NULL,0,.i64ptr=&scc->ext2->ntn_Config_r17->ephemerisInfo_r17->choice.positionVelocity_r17->positionX_r17,.defint64val=LONG_MAX,TYPE_INT64,0}, \
@@ -263,6 +259,15 @@
 {GNB_CONFIG_STRING_TA_COMMON,NULL,0,.i64ptr=&scc->ext2->ntn_Config_r17->ta_Info_r17->ta_Common_r17,.defint64val=-1,TYPE_INT64,0}, \
 {GNB_CONFIG_STRING_MSG1SUBCARRIERSPACING,NULL,0,.i64ptr=scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->msg1_SubcarrierSpacing,.defintval=-1,TYPE_INT64,0}}
 
+#define SCC_PATTERN2_STRING_CONFIG     "pattern2"
+
+#define SCC_PATTERN2_PARAMS_DESC(pattern2) { \
+{GNB_CONFIG_STRING_DLULTRANSMISSIONPERIODICITY2, NULL,0,.i64ptr=&pattern2.dl_UL_TransmissionPeriodicity,.defint64val=-1,TYPE_INT64,0},\
+{GNB_CONFIG_STRING_NROFDOWNLINKSLOTS2, NULL,0,.i64ptr=&pattern2.nrofDownlinkSlots,.defint64val=-1,TYPE_INT64,0},\
+{GNB_CONFIG_STRING_NROFDOWNLINKSYMBOLS2, NULL,0,.i64ptr=&pattern2.nrofDownlinkSymbols,.defint64val=-1,TYPE_INT64,0},\
+{GNB_CONFIG_STRING_NROFUPLINKSLOTS2,NULL, 0,.i64ptr=&pattern2.nrofUplinkSlots,.defint64val=-1,TYPE_INT64,0},\
+{GNB_CONFIG_STRING_NROFUPLINKSYMBOLS2,NULL, 0,.i64ptr=&pattern2.nrofUplinkSymbols,.defint64val=-1,TYPE_INT64,0}}
+
 /*-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
 /*                                     Serving Cell Config Dedicated configuration parameters                                                                                                     */
 /*-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*/
diff --git a/openair2/GNB_APP/gnb_config.c b/openair2/GNB_APP/gnb_config.c
index 39c8014adc..a57d2e0287 100644
--- a/openair2/GNB_APP/gnb_config.c
+++ b/openair2/GNB_APP/gnb_config.c
@@ -113,7 +113,10 @@ void prepare_scc(NR_ServingCellConfigCommon_t *scc)
   scc->ssb_periodicityServingCell = calloc_or_fail(1, sizeof(*scc->ssb_periodicityServingCell));
   scc->ssbSubcarrierSpacing = calloc_or_fail(1, sizeof(*scc->ssbSubcarrierSpacing));
   scc->tdd_UL_DL_ConfigurationCommon = calloc_or_fail(1, sizeof(*scc->tdd_UL_DL_ConfigurationCommon));
-  scc->tdd_UL_DL_ConfigurationCommon->pattern2 = calloc_or_fail(1, sizeof(*scc->tdd_UL_DL_ConfigurationCommon->pattern2));
+  struct NR_TDD_UL_DL_ConfigCommon *tdd = scc->tdd_UL_DL_ConfigurationCommon;
+  tdd->pattern1.ext1 = calloc_or_fail(1, sizeof(*tdd->pattern1.ext1));
+  tdd->pattern1.ext1->dl_UL_TransmissionPeriodicity_v1530 =
+      calloc_or_fail(1, sizeof(*tdd->pattern1.ext1->dl_UL_TransmissionPeriodicity_v1530));
   scc->downlinkConfigCommon = calloc_or_fail(1, sizeof(*scc->downlinkConfigCommon));
   scc->downlinkConfigCommon->frequencyInfoDL = calloc_or_fail(1, sizeof(*scc->downlinkConfigCommon->frequencyInfoDL));
   scc->downlinkConfigCommon->initialDownlinkBWP = calloc_or_fail(1, sizeof(*scc->downlinkConfigCommon->initialDownlinkBWP));
@@ -357,15 +360,52 @@ void fill_scc_sim(NR_ServingCellConfigCommon_t *scc, uint64_t *ssb_bitmap, int N
   p1->nrofUplinkSymbols = 4;
 
   struct NR_TDD_UL_DL_Pattern *p2 = tdd_UL_DL_ConfigurationCommon->pattern2;
-  p2->dl_UL_TransmissionPeriodicity = 321;
-  p2->nrofDownlinkSlots = -1;
-  p2->nrofDownlinkSymbols = -1;
-  p2->nrofUplinkSlots = -1;
-  p2->nrofUplinkSymbols = -1;
+  if (p2) {
+    p2->dl_UL_TransmissionPeriodicity = 321;
+    p2->nrofDownlinkSlots = -1;
+    p2->nrofDownlinkSymbols = -1;
+    p2->nrofUplinkSlots = -1;
+    p2->nrofUplinkSymbols = -1;
+  }
 
   scc->ss_PBCH_BlockPower = 20;
 }
 
+static void fix_tdd_pattern(NR_ServingCellConfigCommon_t *scc)
+{
+  NR_TDD_UL_DL_Pattern_t *pattern1 = &scc->tdd_UL_DL_ConfigurationCommon->pattern1;
+  int pattern_ext = pattern1->dl_UL_TransmissionPeriodicity - 8;
+  // Check if the pattern1 extension is configured and set the value accordingly
+  if (pattern_ext >= 0) {
+    pattern1->ext1 = calloc_or_fail(1, sizeof(struct NR_TDD_UL_DL_Pattern__ext1));
+    pattern1->ext1->dl_UL_TransmissionPeriodicity_v1530 =
+        calloc_or_fail(1, sizeof(*pattern1->ext1->dl_UL_TransmissionPeriodicity_v1530));
+    *pattern1->ext1->dl_UL_TransmissionPeriodicity_v1530 = pattern_ext;
+    pattern1->dl_UL_TransmissionPeriodicity = 5;
+  } else {
+    pattern1->ext1 = NULL;
+  }
+  struct NR_TDD_UL_DL_Pattern *pattern2 = scc->tdd_UL_DL_ConfigurationCommon->pattern2;
+  if (pattern2 != NULL) {
+    /* The pattern2 is not configured free the memory these shall not be encoded with default values in SIB1 */
+    if (pattern2->dl_UL_TransmissionPeriodicity == -1) {
+      free(pattern2);
+      pattern2 = NULL;
+    } else {
+      // Check if the pattern2 extension is configured and set the value accordingly
+      pattern_ext = pattern2->dl_UL_TransmissionPeriodicity - 8;
+      if (pattern_ext >= 0) {
+        pattern2->ext1 = calloc_or_fail(1, sizeof(*pattern2->ext1));
+        pattern2->ext1->dl_UL_TransmissionPeriodicity_v1530 =
+            CALLOC(1, sizeof(*pattern2->ext1->dl_UL_TransmissionPeriodicity_v1530));
+        *pattern2->ext1->dl_UL_TransmissionPeriodicity_v1530 = pattern_ext;
+        pattern2->dl_UL_TransmissionPeriodicity = 5;
+      } else {
+        pattern2->ext1 = NULL;
+      }
+    }
+  }
+}
 
 void fix_scc(NR_ServingCellConfigCommon_t *scc, uint64_t ssbmap)
 {
@@ -436,11 +476,7 @@ void fix_scc(NR_ServingCellConfigCommon_t *scc, uint64_t ssbmap)
     ASN_STRUCT_FREE(asn_DEF_NR_TDD_UL_DL_ConfigCommon, scc->tdd_UL_DL_ConfigurationCommon);
     scc->tdd_UL_DL_ConfigurationCommon = NULL;
   } else { // TDD
-    if (scc->tdd_UL_DL_ConfigurationCommon->pattern2->dl_UL_TransmissionPeriodicity > 320 ) {
-      free(scc->tdd_UL_DL_ConfigurationCommon->pattern2);
-      scc->tdd_UL_DL_ConfigurationCommon->pattern2 = NULL;
-    }
-
+    fix_tdd_pattern(scc);
   }
 
   if ((int)*scc->uplinkConfigCommon->initialUplinkBWP->rach_ConfigCommon->choice.setup->msg1_SubcarrierSpacing == -1) {
@@ -982,6 +1018,16 @@ void RCconfig_NR_L1(void)
   }
 }
 
+/**
+ * @brief Returns true when pattern2 is filled in
+ */
+bool is_pattern2_config(paramdef_t *param)
+{
+  if (param == NULL || param->i64ptr == NULL || *(param->i64ptr) == -1)
+    return false;
+  return true;
+}
+
 static NR_ServingCellConfigCommon_t *get_scc_config(configmodule_interface_t *cfg, int minRXTXTIME)
 {
   NR_ServingCellConfigCommon_t *scc = calloc_or_fail(1, sizeof(*scc));
@@ -1002,6 +1048,33 @@ static NR_ServingCellConfigCommon_t *get_scc_config(configmodule_interface_t *cf
     sprintf(aprefix, "%s.[%i].%s.[%i]", GNB_CONFIG_STRING_GNB_LIST,0,GNB_CONFIG_STRING_SERVINGCELLCONFIGCOMMON, 0);
     config_get(cfg, SCCsParams, sizeofArray(SCCsParams), aprefix);
     config_get(cfg, MsgASCCsParams, sizeofArray(MsgASCCsParams), aprefix);
+    // NR_TDD-UL-DL-ConfigCommon pattern2 (optional IE)
+    // fetch params
+    struct NR_TDD_UL_DL_Pattern p2;
+    paramdef_t pattern2Params[] = SCC_PATTERN2_PARAMS_DESC(p2);
+    char aprefix[MAX_OPTNAME_SIZE * 2 + 8];
+    sprintf(aprefix, "%s.[%i].%s.[%i].%s", GNB_CONFIG_STRING_GNB_LIST, 0, GNB_CONFIG_STRING_SERVINGCELLCONFIGCOMMON, 0, SCC_PATTERN2_STRING_CONFIG);
+    config_get(config_get_if(), pattern2Params, sizeofArray(pattern2Params), aprefix);
+    // check validity
+    bool is_pattern2 = false;
+    for (int i = 0; i < sizeofArray(pattern2Params); i++) {
+      is_pattern2 |= is_pattern2_config(pattern2Params);
+    }
+
+    if (is_pattern2) {
+      LOG_I(GNB_APP, "tdd->pattern2 present\n");
+      // allocate memory
+      struct NR_TDD_UL_DL_ConfigCommon *tdd = scc->tdd_UL_DL_ConfigurationCommon;
+      tdd->pattern2 = calloc_or_fail(1, sizeof(*tdd->pattern2));
+      tdd->pattern2->ext1 = calloc_or_fail(1, sizeof(struct NR_TDD_UL_DL_Pattern__ext1));
+      tdd->pattern2->ext1->dl_UL_TransmissionPeriodicity_v1530 = calloc_or_fail(1, sizeof(*tdd->pattern2->ext1->dl_UL_TransmissionPeriodicity_v1530));
+      // fill in scc
+      *scc->tdd_UL_DL_ConfigurationCommon->pattern2 = p2;
+      AssertFatal(p2.nrofUplinkSlots ^ scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSlots,
+                  "UL slots in pattern1 (%ld) and pattern2 (%ld) are mutually exclusive (e.g. DDDFUU DDDD, DDDD DDDFUU)\n",
+                  scc->tdd_UL_DL_ConfigurationCommon->pattern1.nrofUplinkSlots,
+                  p2.nrofUplinkSlots);
+    }
     struct NR_FrequencyInfoDL *frequencyInfoDL = scc->downlinkConfigCommon->frequencyInfoDL;
     LOG_I(RRC,
           "Read in ServingCellConfigCommon (PhysCellId %d, ABSFREQSSB %d, DLBand %d, ABSFREQPOINTA %d, DLBW "