diff --git a/nanostack/mac_api.h b/nanostack/mac_api.h
index f9e59b40587..fea75801299 100644
--- a/nanostack/mac_api.h
+++ b/nanostack/mac_api.h
@@ -32,6 +32,8 @@
 extern "C" {
 #endif
 
+struct channel_list_s;
+
 typedef struct mac_api_s mac_api_t;
 
 /**
@@ -125,8 +127,11 @@ typedef void mcps_data_request(const mac_api_t* api, const mcps_data_req_t *data
  * @param api API to handle the request
  * @param data MCPS-DATA.request specific values
  * @param ie_ext Information element list to MCPS-DATA.request
+ * @param asynch_channel_list Optional channel list to asynch data request. Give NULL when normal data request.
+ *
+ * Asynch data request is mac standard extension. asynch_channel_list include channel mask which channel message is requested to send.
  */
-typedef void mcps_data_request_ext(const mac_api_t* api, const mcps_data_req_t *data, const mcps_data_req_ie_list_t *ie_ext);
+typedef void mcps_data_request_ext(const mac_api_t* api, const mcps_data_req_t *data, const mcps_data_req_ie_list_t *ie_ext, const struct channel_list_s *asynch_channel_list);
 
 /**
  * @brief mcps_purge_request MCPS_PURGE request call
diff --git a/source/MAC/IEEE802_15_4/mac_defines.h b/source/MAC/IEEE802_15_4/mac_defines.h
index 74d0e73597c..74c34628e72 100644
--- a/source/MAC/IEEE802_15_4/mac_defines.h
+++ b/source/MAC/IEEE802_15_4/mac_defines.h
@@ -139,6 +139,7 @@ typedef struct protocol_interface_rf_mac_setup {
     bool macUpState;
     bool shortAdressValid: 1;   //Define Dynamic src address to mac16 when it is true
     bool beaconSrcAddressModeLong: 1; //This force beacon src to mac64 otherwise shortAdressValid will define type
+    bool mac_extension_enabled:1;
     uint16_t mac_short_address;
     uint16_t pan_id;
     uint8_t mac64[8];
diff --git a/source/MAC/IEEE802_15_4/mac_mcps_sap.c b/source/MAC/IEEE802_15_4/mac_mcps_sap.c
index e4f25413d06..d2dc7ad936b 100644
--- a/source/MAC/IEEE802_15_4/mac_mcps_sap.c
+++ b/source/MAC/IEEE802_15_4/mac_mcps_sap.c
@@ -95,14 +95,17 @@ void mcps_sap_data_req_handler(protocol_interface_rf_mac_setup_s *rf_mac_setup ,
 {
     mcps_data_req_ie_list_t ie_list;
     memset(&ie_list, 0 , sizeof(mcps_data_req_ie_list_t));
-    mcps_sap_data_req_handler_ext(rf_mac_setup, data_req, &ie_list);
+    mcps_sap_data_req_handler_ext(rf_mac_setup, data_req, &ie_list, NULL);
 }
 
 
-void mcps_sap_data_req_handler_ext(protocol_interface_rf_mac_setup_s *rf_mac_setup , const mcps_data_req_t *data_req , const mcps_data_req_ie_list_t *ie_list) {
+void mcps_sap_data_req_handler_ext(protocol_interface_rf_mac_setup_s *rf_mac_setup , const mcps_data_req_t *data_req , const mcps_data_req_ie_list_t *ie_list, const channel_list_s *asynch_channel_list) {
     uint8_t status = MLME_SUCCESS;
     mac_pre_build_frame_t *buffer = NULL;
 
+    //Asynch Data request will be enabled seperately lare API is defined
+
+
     if (!rf_mac_setup->mac_security_enabled) {
         if (data_req->Key.SecurityLevel) {
             status = MLME_UNSUPPORTED_SECURITY;
@@ -123,6 +126,12 @@ void mcps_sap_data_req_handler_ext(protocol_interface_rf_mac_setup_s *rf_mac_set
         goto verify_status;
     }
 
+    if ((ie_header_length || ie_payload_length || asynch_channel_list) && !rf_mac_setup->mac_extension_enabled ) {
+        //Report error when feature is not enaled yet
+        status = MLME_INVALID_PARAMETER;
+        goto verify_status;
+    }
+
     if ((data_req->msduLength + ie_header_length + ie_payload_length) > rf_mac_setup->dev_driver->phy_driver->phy_MTU - MAC_DATA_PACKET_MIN_HEADER_LENGTH) {
         tr_debug("packet %u, %u",data_req->msduLength, rf_mac_setup->dev_driver->phy_driver->phy_MTU);
         status = MLME_FRAME_TOO_LONG;
@@ -142,6 +151,13 @@ void mcps_sap_data_req_handler_ext(protocol_interface_rf_mac_setup_s *rf_mac_set
         tr_debug("Drop MAC tx packet when mac disabled");
         goto verify_status;
     }
+
+    if (asynch_channel_list ) {
+        //Copy Asynch data list
+        buffer->asynch_channel_list = *asynch_channel_list;
+        buffer->asynch_request = true;
+    }
+
     buffer->upper_layer_request = true;
     buffer->fcf_dsn.frametype = FC_DATA_FRAME;
     buffer->fcf_dsn.ackRequested = data_req->TxAckReq;
diff --git a/source/MAC/IEEE802_15_4/mac_mcps_sap.h b/source/MAC/IEEE802_15_4/mac_mcps_sap.h
index dd628f73b86..9b721479eca 100644
--- a/source/MAC/IEEE802_15_4/mac_mcps_sap.h
+++ b/source/MAC/IEEE802_15_4/mac_mcps_sap.h
@@ -34,6 +34,7 @@ struct arm_phy_sap_msg_s;
 struct mcps_purge_s;
 struct mcps_data_ie_list;
 struct mcps_data_req_ie_list;
+struct channel_list_s;
 
 /** Address types */
 typedef enum {
@@ -120,10 +121,12 @@ typedef struct mac_pre_build_frame{
     uint8_t msduHandle;
     uint16_t buffer_ttl;
     struct mcps_data_req_ie_list ie_elements;
+    struct channel_list_s asynch_channel_list;
     uint8_t *mac_payload;
     uint8_t status;
     bool upper_layer_request;
     bool mac_allocated_payload_ptr:1;
+    bool asynch_request:1;
     unsigned security_mic_len:5;    //Max possible lengths 0, 4, 8, 16 bytes
     unsigned priority:2;
     struct mac_pre_build_frame *next; //Pointer for queue purpose
@@ -179,7 +182,7 @@ int8_t mac_virtual_sap_data_cb(void *identifier, struct arm_phy_sap_msg_s *messa
 
 void mcps_sap_data_req_handler(struct protocol_interface_rf_mac_setup *rf_mac_setup , const struct mcps_data_req_s *data_req );
 
-void mcps_sap_data_req_handler_ext(struct protocol_interface_rf_mac_setup *rf_mac_setup , const struct mcps_data_req_s *data_req , const struct mcps_data_req_ie_list *ie_list);
+void mcps_sap_data_req_handler_ext(struct protocol_interface_rf_mac_setup *rf_mac_setup , const struct mcps_data_req_s *data_req , const struct mcps_data_req_ie_list *ie_list, const channel_list_s *asynch_channel_list);
 
 void mac_mcps_trig_buffer_from_queue(struct protocol_interface_rf_mac_setup *rf_mac_setup);
 
diff --git a/source/MAC/IEEE802_15_4/sw_mac.c b/source/MAC/IEEE802_15_4/sw_mac.c
index d2d4d616a44..21091342d1c 100644
--- a/source/MAC/IEEE802_15_4/sw_mac.c
+++ b/source/MAC/IEEE802_15_4/sw_mac.c
@@ -53,7 +53,7 @@ static int8_t ns_sw_mac_api_enable_mcps_ext(mac_api_t *api, mcps_data_indication
 
 static void mlme_req(const mac_api_t* api, mlme_primitive id, const void *data);
 static void mcps_req(const mac_api_t* api, const mcps_data_req_t *data);
-static void mcps_req_ext(const mac_api_t* api, const mcps_data_req_t *data, const const mcps_data_req_ie_list_t *ie_ext);
+static void mcps_req_ext(const mac_api_t* api, const mcps_data_req_t *data, const const mcps_data_req_ie_list_t *ie_ext, const channel_list_s *asynch_channel_list);
 static void purge_req(const mac_api_t* api, const mcps_purge_t *data);
 static int8_t macext_mac64_address_set( const mac_api_t* api, const uint8_t *mac64);
 static int8_t macext_mac64_address_get( const mac_api_t* api, mac_extended_address_type type, uint8_t *mac64_buf);
@@ -227,6 +227,7 @@ static int8_t ns_sw_mac_api_enable_mcps_ext(mac_api_t *api, mcps_data_indication
 
     cur->data_conf_ext_cb = data_cnf_cb;
     cur->data_ind_ext_cb = data_ind_cb;
+    mac_store.setup->mac_extension_enabled = true;
     return 0;
 }
 
@@ -468,15 +469,15 @@ void mcps_req(const mac_api_t* api, const mcps_data_req_t *data)
         /* Call direct new API but without IE extensions */
         mcps_data_req_ie_list_t ie_list;
         memset(&ie_list, 0 , sizeof(mcps_data_req_ie_list_t));
-        mcps_sap_data_req_handler_ext(mac_store.setup , data , &ie_list);
+        mcps_sap_data_req_handler_ext(mac_store.setup , data , &ie_list, NULL);
     }
 }
 
-void mcps_req_ext(const mac_api_t* api, const mcps_data_req_t *data, const mcps_data_req_ie_list_t *ie_ext)
+void mcps_req_ext(const mac_api_t* api, const mcps_data_req_t *data, const mcps_data_req_ie_list_t *ie_ext, const channel_list_s *asynch_channel_list)
 {
 //TODO: Populate linked list when present
     if (mac_store.mac_api == api) {
-        mcps_sap_data_req_handler_ext(mac_store.setup , data , ie_ext);
+        mcps_sap_data_req_handler_ext(mac_store.setup , data , ie_ext, asynch_channel_list);
     }
 }
 
diff --git a/test/nanostack/unittest/stub/mac_mcps_sap_stub.c b/test/nanostack/unittest/stub/mac_mcps_sap_stub.c
index ef37db34292..7aa28d1ca54 100644
--- a/test/nanostack/unittest/stub/mac_mcps_sap_stub.c
+++ b/test/nanostack/unittest/stub/mac_mcps_sap_stub.c
@@ -55,7 +55,7 @@ mac_mcps_sap_stub_def mac_mcps_sap_stub;
 void mcps_sap_data_req_handler(protocol_interface_rf_mac_setup_s *rf_mac_setup , const mcps_data_req_t *data_req )
 {
 }
-void mcps_sap_data_req_handler_ext(struct protocol_interface_rf_mac_setup *rf_mac_setup , const struct mcps_data_req_s *data_req , const struct mcps_data_req_ie_list *ie_list)
+void mcps_sap_data_req_handler_ext(struct protocol_interface_rf_mac_setup *rf_mac_setup , const struct mcps_data_req_s *data_req , const struct mcps_data_req_ie_list *ie_list, const channel_list_s *asynch_channel_list)
 {
 
 }