diff --git a/openair2/COMMON/nrppa_messages_def.h b/openair2/COMMON/nrppa_messages_def.h
index d20bf1960a..bb5d534856 100644
--- a/openair2/COMMON/nrppa_messages_def.h
+++ b/openair2/COMMON/nrppa_messages_def.h
@@ -32,3 +32,7 @@ MESSAGE_DEF(NRPPA_POSITIONING_INFORMATION_RESP,
             MESSAGE_PRIORITY_MED,
             nrppa_positioning_information_resp_t,
             nrppa_positioning_information_resp)
+MESSAGE_DEF(NRPPA_POSITIONING_ACTIVATION_REQ,
+            MESSAGE_PRIORITY_MED,
+            nrppa_positioning_activation_req_t,
+            nrppa_positioning_activation_req)
diff --git a/openair2/COMMON/nrppa_messages_types.h b/openair2/COMMON/nrppa_messages_types.h
index 4522604422..077c5a89b0 100644
--- a/openair2/COMMON/nrppa_messages_types.h
+++ b/openair2/COMMON/nrppa_messages_types.h
@@ -28,6 +28,7 @@
 #define NRPPA_TRP_INFORMATION_RESP(mSGpTR) (mSGpTR)->ittiMsg.nrppa_trp_information_resp
 #define NRPPA_POSITIONING_INFORMATION_REQ(mSGpTR) (mSGpTR)->ittiMsg.nrppa_positioning_information_req
 #define NRPPA_POSITIONING_INFORMATION_RESP(mSGpTR) (mSGpTR)->ittiMsg.nrppa_positioning_information_resp
+#define NRPPA_POSITIONING_ACTIVATION_REQ(mSGpTR) (mSGpTR)->ittiMsg.nrppa_positioning_activation_req
 
 /* Structure of Positioning related NRPPA messages */
 /* IE structures for Positioning related messages as per TS 38.455 V16.7.1*/
@@ -570,6 +571,22 @@ typedef struct nrppa_trp_information_list_s {
   uint32_t trp_information_item_length;
 } nrppa_trp_information_list_t;
 
+typedef union nrppa_srs_type_c {
+  uint8_t *srs_resource_set_id;
+  bool *aperiodic;
+} nrppa_srs_type_u;
+
+typedef enum nrppa_srs_type_e {
+  NRPPA_SRS_TYPE_PR_NOTHING,
+  NRPPA_SRS_TYPE_PR_SEMIPERSISTENTSRS,
+  NRPPA_SRS_TYPE_PR_APERIODICSRS
+} nrppa_srs_type_pr;
+
+typedef struct nrppa_srs_type_s {
+  nrppa_srs_type_pr present;
+  nrppa_srs_type_u choice;
+} nrppa_srs_type_t;
+
 typedef struct nrppa_trp_information_req_s {
   // IE 9.2.4 (mandatory)
   uint16_t transaction_id;
@@ -599,4 +616,11 @@ typedef struct nrppa_positioning_information_resp_s {
   nrppa_srs_configuration_t *srs_configuration;
 } nrppa_positioning_information_resp_t;
 
+typedef struct nrppa_positioning_activation_req_s {
+  // IE 9.2.4 (mandatory)
+  uint16_t transaction_id;
+  // (mandatory)
+  nrppa_srs_type_t srs_type;
+} nrppa_positioning_activation_req_t;
+
 #endif // NRPPA_MESSAGES_TYPES_H_
diff --git a/openair3/NRPPA/nrppa_gNB_decoder.c b/openair3/NRPPA/nrppa_gNB_decoder.c
index 94524fd060..340ff63baa 100644
--- a/openair3/NRPPA/nrppa_gNB_decoder.c
+++ b/openair3/NRPPA/nrppa_gNB_decoder.c
@@ -40,7 +40,11 @@ static int nrppa_gNB_decode_initiating_message(NRPPA_NRPPA_PDU_t *pdu)
       LOG_I(NRPPA, "Positioning Information Request initiating message\n");
       free(res.buffer);
       break;
-
+    case NRPPA_ProcedureCode_id_positioningActivation:
+      res = asn_encode_to_new_buffer(NULL, ATS_CANONICAL_XER, &asn_DEF_NRPPA_NRPPA_PDU, pdu);
+      LOG_I(NRPPA, "Positioning Activation initiating message\n");
+      free(res.buffer);
+      break;
     default:
       AssertFatal(false, "Unknown procedure ID (%d) for initiating message\n", (int)pdu->choice.initiatingMessage->procedureCode);
       return -1;
diff --git a/openair3/NRPPA/nrppa_gNB_handlers.c b/openair3/NRPPA/nrppa_gNB_handlers.c
index 99299ecb64..4689351b11 100644
--- a/openair3/NRPPA/nrppa_gNB_handlers.c
+++ b/openair3/NRPPA/nrppa_gNB_handlers.c
@@ -57,7 +57,9 @@ nrppa_message_decoded_callback nrppa_messages_callback[][3] = {
     {0, 0, 0}, // NRPPA_ProcedureCode_id_MeasurementAbort     ((NRPPA_ProcedureCode_t)14)
     {0, 0, 0}, // NRPPA_ProcedureCode_id_MeasurementFailureIndication   ((NRPPA_ProcedureCode_t)15)
     {nrppa_gNB_handle_trp_information_request, 0, 0}, // NRPPA_ProcedureCode_id_tRPInformationExchange   ((NRPPA_ProcedureCode_t)16)
-    {0, 0, 0}, // NRPPA_ProcedureCode_id_positioningActivation        ((NRPPA_ProcedureCode_t)17)
+    {nrppa_gNB_handle_positioning_activation_request,
+     0,
+     0}, // NRPPA_ProcedureCode_id_positioningActivation        ((NRPPA_ProcedureCode_t)17)
     {0, 0, 0}, // NRPPA_ProcedureCode_id_positioningDeactivation      ((NRPPA_ProcedureCode_t)18)
 };
 
diff --git a/openair3/NRPPA/nrppa_gNB_location_information_transfer.c b/openair3/NRPPA/nrppa_gNB_location_information_transfer.c
index 5d1a43c0a6..dfaa7f1efc 100644
--- a/openair3/NRPPA/nrppa_gNB_location_information_transfer.c
+++ b/openair3/NRPPA/nrppa_gNB_location_information_transfer.c
@@ -985,6 +985,37 @@ void free_positioning_information_response(nrppa_positioning_information_resp_t
   }
 }
 
+void decode_nrppa_srstype(NRPPA_SRSType_t *srs_type, nrppa_srs_type_t *out)
+{
+  switch (srs_type->present) {
+    case NRPPA_SRSType_PR_NOTHING:
+      out->present = NRPPA_SRS_TYPE_PR_NOTHING;
+      break;
+    case NRPPA_SRSType_PR_semipersistentSRS:
+      out->present = NRPPA_SRS_TYPE_PR_SEMIPERSISTENTSRS;
+      out->choice.srs_resource_set_id = calloc_or_fail(1, sizeof(*out->choice.srs_resource_set_id));
+      *out->choice.srs_resource_set_id = srs_type->choice.semipersistentSRS->sRSResourceSetID;
+      break;
+    case NRPPA_SRSType_PR_aperiodicSRS:
+      out->present = NRPPA_SRS_TYPE_PR_APERIODICSRS;
+      out->choice.aperiodic = calloc_or_fail(1, sizeof(*out->choice.aperiodic));
+      *out->choice.aperiodic = srs_type->choice.aperiodicSRS->aperiodic;
+      break;
+    default:
+      AssertFatal(false, "received illegal SRS type\n");
+      break;
+  }
+}
+
+void free_positioning_activation_request(nrppa_positioning_activation_req_t *msg)
+{
+  if (msg->srs_type.present == NRPPA_SRS_TYPE_PR_SEMIPERSISTENTSRS) {
+    free(msg->srs_type.choice.srs_resource_set_id);
+  } else if (msg->srs_type.present == NRPPA_SRS_TYPE_PR_APERIODICSRS) {
+    free(msg->srs_type.choice.aperiodic);
+  }
+}
+
 int nrppa_gNB_handle_trp_information_request(nrppa_gnb_ue_info_t *nrppa_msg_info, const NRPPA_NRPPA_PDU_t *pdu)
 {
   LOG_I(NRPPA, "Processing Received TRP Information Request \n");
@@ -1244,3 +1275,40 @@ int nrppa_gNB_positioning_information_response(instance_t instance, MessageDef *
   free(buffer);
   return length;
 }
+
+int nrppa_gNB_handle_positioning_activation_request(nrppa_gnb_ue_info_t *nrppa_msg_info, const NRPPA_NRPPA_PDU_t *pdu)
+{
+  LOG_I(NRPPA, "Processing Received Positioning Activation Request \n");
+  DevAssert(pdu != NULL);
+  DevAssert(nrppa_msg_info != NULL);
+
+  if (LOG_DEBUGFLAG(DEBUG_ASN1)) {
+    xer_fprint(stdout, &asn_DEF_NRPPA_NRPPA_PDU, pdu);
+  }
+
+  // Preparing positioning information request for RRC
+  MessageDef *msg = itti_alloc_new_message(TASK_RRC_GNB, 0, NRPPA_POSITIONING_ACTIVATION_REQ);
+  nrppa_positioning_activation_req_t *req = &NRPPA_POSITIONING_ACTIVATION_REQ(msg);
+
+  // Processing Received PositioningActivationRequest
+  NRPPA_PositioningActivationRequest_t *container = NULL;
+  NRPPA_PositioningActivationRequestIEs_t *ie = NULL;
+
+  // IE 9.2.3 Message type : mandatory
+  container = &pdu->choice.initiatingMessage->value.choice.PositioningActivationRequest;
+
+  // IE 9.2.4 nrppatransactionID : mandatory
+  req->transaction_id = pdu->choice.initiatingMessage->nrppatransactionID;
+
+  // IE SRSType : mandatory
+  NRPPA_FIND_PROTOCOLIE_BY_ID(NRPPA_PositioningActivationRequestIEs_t, ie, container, NRPPA_ProtocolIE_ID_id_SRSType, true);
+  decode_nrppa_srstype(&ie->value.choice.SRSType, &req->srs_type);
+
+  nrppa_store_ue_context(nrppa_msg_info, req->transaction_id);
+
+  LOG_I(NRPPA, "Forwarding to RRC Positioning Activation Request transaction id = %d\n", req->transaction_id);
+
+  itti_send_msg_to_task(TASK_RRC_GNB, 0, msg);
+  ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_NRPPA_NRPPA_PDU, &pdu);
+  return 0;
+}
diff --git a/openair3/NRPPA/nrppa_gNB_location_information_transfer.h b/openair3/NRPPA/nrppa_gNB_location_information_transfer.h
index 31ab194345..d86c7b2744 100644
--- a/openair3/NRPPA/nrppa_gNB_location_information_transfer.h
+++ b/openair3/NRPPA/nrppa_gNB_location_information_transfer.h
@@ -32,5 +32,8 @@ int nrppa_gNB_handle_positioning_information_request(nrppa_gnb_ue_info_t *nrppa_
 int nrppa_gNB_positioning_information_response(instance_t instance, MessageDef *msg_p);
 NRPPA_SRSCarrier_List_t encode_srs_carrier_list_nrppa(const nrppa_srs_carrier_list_t *in_list);
 void free_positioning_information_response(nrppa_positioning_information_resp_t *msg);
+int nrppa_gNB_handle_positioning_activation_request(nrppa_gnb_ue_info_t *nrppa_msg_info, const NRPPA_NRPPA_PDU_t *pdu);
+void decode_nrppa_srstype(NRPPA_SRSType_t *srs_type, nrppa_srs_type_t *out);
+void free_positioning_activation_request(nrppa_positioning_activation_req_t *msg);
 
 #endif /* NRPPA_GNB_POSITIONING_PROCEDURES_H_ */
diff --git a/openair3/NRPPA/nrppa_includes.h b/openair3/NRPPA/nrppa_includes.h
index 6915b93370..6465d6c0af 100644
--- a/openair3/NRPPA/nrppa_includes.h
+++ b/openair3/NRPPA/nrppa_includes.h
@@ -69,5 +69,7 @@
 #include "NRPPA_PosResourceSetTypePeriodic.h"
 #include "NRPPA_PosResourceSetTypeSemi-persistent.h"
 #include "NRPPA_PosResourceSetTypeAperiodic.h"
+#include "NRPPA_SemipersistentSRS.h"
+#include "NRPPA_AperiodicSRS.h"
 
 #endif /* NRPPA_INCLUDE_H_ */