diff --git a/components/bt/host/bluedroid/api/esp_gap_ble_api.c b/components/bt/host/bluedroid/api/esp_gap_ble_api.c
index 9f5a1f5853..278b3bd9d1 100644
--- a/components/bt/host/bluedroid/api/esp_gap_ble_api.c
+++ b/components/bt/host/bluedroid/api/esp_gap_ble_api.c
@@ -1502,6 +1502,17 @@ esp_err_t esp_ble_gap_periodic_adv_clear_dev(void)
             == BT_STATUS_SUCCESS ? ESP_OK : ESP_FAIL);
 
 }
+
+esp_err_t esp_ble_gap_get_periodic_list_size(uint8_t *size)
+{
+    if (size == NULL) {
+        return ESP_FAIL;
+    }
+    btc_get_periodic_list_size(size);
+
+    return ESP_OK;
+}
+
 #endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 
 #if (BLE_50_EXTEND_SCAN_EN == TRUE)
diff --git a/components/bt/host/bluedroid/api/include/api/esp_gap_ble_api.h b/components/bt/host/bluedroid/api/include/api/esp_gap_ble_api.h
index 748c34c2ca..59c1e1e9fd 100644
--- a/components/bt/host/bluedroid/api/include/api/esp_gap_ble_api.h
+++ b/components/bt/host/bluedroid/api/include/api/esp_gap_ble_api.h
@@ -2593,6 +2593,17 @@ esp_err_t esp_ble_gap_periodic_adv_remove_dev_from_list(esp_ble_addr_type_t addr
 */
 esp_err_t esp_ble_gap_periodic_adv_clear_dev(void);
 
+/**
+ * @brief            Retrieve the capacity of the periodic advertiser list in the controller.
+ *
+ * @param[out]       size: Pointer to a variable where the capacity of the periodic advertiser list will be stored.
+ *
+ * @return
+ *                     - ESP_OK : Success
+ *                     - Others : Failure
+ */
+esp_err_t esp_ble_gap_get_periodic_list_size(uint8_t *size);
+
 /**
 * @brief           This function is used to set aux connection parameters
 *
@@ -2611,7 +2622,6 @@ esp_err_t esp_ble_gap_prefer_ext_connect_params_set(esp_bd_addr_t addr,
                                                     const esp_ble_gap_conn_params_t *phy_1m_conn_params,
                                                     const esp_ble_gap_conn_params_t *phy_2m_conn_params,
                                                     const esp_ble_gap_conn_params_t *phy_coded_conn_params);
-
 #endif //#if (BLE_50_FEATURE_SUPPORT == TRUE)
 
 #if (BLE_FEAT_PERIODIC_ADV_SYNC_TRANSFER == TRUE)
diff --git a/components/bt/host/bluedroid/btc/profile/std/gap/btc_gap_ble.c b/components/bt/host/bluedroid/btc/profile/std/gap/btc_gap_ble.c
index c4cbdc0a1d..5a54f33b67 100644
--- a/components/bt/host/bluedroid/btc/profile/std/gap/btc_gap_ble.c
+++ b/components/bt/host/bluedroid/btc/profile/std/gap/btc_gap_ble.c
@@ -1594,6 +1594,13 @@ static void btc_ble_dtm_enhance_rx_start(uint8_t rx_channel, uint8_t phy, uint8_
 }
 #endif // #if (BLE_50_DTM_TEST_EN == TRUE)
 
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+void btc_get_periodic_list_size(uint8_t *size)
+{
+    BTM_BleGetPeriodicAdvListSize(size);
+    return;
+}
+#endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #if ((BLE_42_DTM_TEST_EN == TRUE) || (BLE_50_DTM_TEST_EN == TRUE))
 static void btc_ble_dtm_stop(tBTA_DTM_CMD_CMPL_CBACK *p_dtm_cmpl_cback)
 {
diff --git a/components/bt/host/bluedroid/btc/profile/std/include/btc_gap_ble.h b/components/bt/host/bluedroid/btc/profile/std/include/btc_gap_ble.h
index d3829aa2e0..988b234205 100644
--- a/components/bt/host/bluedroid/btc/profile/std/include/btc_gap_ble.h
+++ b/components/bt/host/bluedroid/btc/profile/std/include/btc_gap_ble.h
@@ -463,6 +463,9 @@ typedef union {
 void btc_gap_ble_call_handler(btc_msg_t *msg);
 void btc_gap_ble_cb_handler(btc_msg_t *msg);
 void btc_get_whitelist_size(uint16_t *length);
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+void btc_get_periodic_list_size(uint8_t *length);
+#endif //#if (BLE_50_EXTEND_SYNC_EN == TRUE)
 void btc_gap_ble_arg_deep_copy(btc_msg_t *msg, void *p_dest, void *p_src);
 void btc_gap_ble_arg_deep_free(btc_msg_t *msg);
 void btc_gap_ble_cb_deep_free(btc_msg_t *msg);
diff --git a/components/bt/host/bluedroid/device/controller.c b/components/bt/host/bluedroid/device/controller.c
index d745bcba0c..ded9356943 100644
--- a/components/bt/host/bluedroid/device/controller.c
+++ b/components/bt/host/bluedroid/device/controller.c
@@ -86,6 +86,9 @@ typedef struct {
 #if (BLE_50_EXTEND_ADV_EN == TRUE)
     uint16_t ble_ext_adv_data_max_len;
 #endif // #if (BLE_50_EXTEND_ADV_EN == TRUE)
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+    uint16_t get_ble_periodic_advertiser_list_size;
+#endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif //#if (BLE_50_FEATURE_SUPPORT == TRUE)
 } controller_local_param_t;
 
@@ -283,6 +286,12 @@ static void start_up(void)
                 &controller_param.ble_ext_adv_data_max_len);
         }
 #endif // #if (BLE_50_EXTEND_ADV_EN == TRUE)
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+        response = AWAIT_COMMAND(controller_param.packet_factory->read_periodic_adv_list_size());
+        controller_param.packet_parser->parse_ble_read_periodic_adv_list_size_response(
+            response,
+            &controller_param.get_ble_periodic_advertiser_list_size);
+#endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif // (BLE_50_FEATURE_SUPPORT == TRUE && BLE_42_FEATURE_SUPPORT == FALSE)
 
         if (HCI_LE_DATA_LEN_EXT_SUPPORTED(controller_param.features_ble.as_array)) {
@@ -525,6 +534,14 @@ static uint16_t ble_get_ext_adv_data_max_len(void)
     return controller_param.ble_ext_adv_data_max_len;
 }
 #endif // #if (BLE_50_EXTEND_ADV_EN == TRUE)
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+static uint8_t get_ble_periodic_adv_list_size(void)
+{
+    assert(controller_param.readable);
+    assert(controller_param.ble_supported);
+    return controller_param.get_ble_periodic_advertiser_list_size;
+}
+#endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif // #if (BLE_50_FEATURE_SUPPORT == TRUE)
 #if (BTM_SCO_HCI_INCLUDED == TRUE)
 static uint8_t get_sco_data_size(void)
@@ -587,6 +604,9 @@ static const controller_t interface = {
 #if (BLE_50_EXTEND_ADV_EN == TRUE)
     ble_get_ext_adv_data_max_len,
 #endif // #if (BLE_50_EXTEND_ADV_EN == TRUE)
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+    get_ble_periodic_adv_list_size,
+#endif // (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif // #if (BLE_50_FEATURE_SUPPORT == TRUE)
 #if (BTM_SCO_HCI_INCLUDED == TRUE)
     get_sco_data_size,
diff --git a/components/bt/host/bluedroid/device/include/device/controller.h b/components/bt/host/bluedroid/device/include/device/controller.h
index b515d17f8b..6345d7a9c9 100644
--- a/components/bt/host/bluedroid/device/include/device/controller.h
+++ b/components/bt/host/bluedroid/device/include/device/controller.h
@@ -84,6 +84,9 @@ typedef struct controller_t {
 #if (BLE_50_EXTEND_ADV_EN == TRUE)
     uint16_t (*ble_get_ext_adv_data_max_len)(void);
 #endif // #if (BLE_50_EXTEND_ADV_EN == TRUE)
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+    uint8_t (*get_ble_periodic_adv_list_size)(void);
+#endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif // BLE_50_FEATURE_SUPPORT
 
 #if (BTM_SCO_HCI_INCLUDED == TRUE)
diff --git a/components/bt/host/bluedroid/hci/hci_packet_factory.c b/components/bt/host/bluedroid/hci/hci_packet_factory.c
index 5b037b0a8e..5649a9f6c1 100644
--- a/components/bt/host/bluedroid/hci/hci_packet_factory.c
+++ b/components/bt/host/bluedroid/hci/hci_packet_factory.c
@@ -226,6 +226,12 @@ static BT_HDR *make_read_max_adv_data_len(void)
     return make_command_no_params(HCI_BLE_RD_MAX_ADV_DATA_LEN);
 }
 #endif // #if (BLE_50_EXTEND_ADV_EN == TRUE)
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+static BT_HDR *read_periodic_adv_list_size(void)
+{
+    return make_command_no_params(HCI_BLE_RD_PERIOD_ADV_LIST_SIZE);
+}
+#endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif // #if (BLE_50_FEATURE_SUPPORT == TRUE)
 // Internal functions
 
@@ -277,6 +283,9 @@ static const hci_packet_factory_t interface = {
 #if (BLE_50_EXTEND_ADV_EN == TRUE)
     make_read_max_adv_data_len,
 #endif // #if (BLE_50_EXTEND_ADV_EN == TRUE)
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+    read_periodic_adv_list_size,
+#endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif // #if (BLE_50_FEATURE_SUPPORT == TRUE)
     make_ble_read_suggested_default_data_length,
     make_ble_write_suggested_default_data_length,
diff --git a/components/bt/host/bluedroid/hci/hci_packet_parser.c b/components/bt/host/bluedroid/hci/hci_packet_parser.c
index 0a39276b6f..58660fddd2 100644
--- a/components/bt/host/bluedroid/hci/hci_packet_parser.c
+++ b/components/bt/host/bluedroid/hci/hci_packet_parser.c
@@ -222,7 +222,21 @@ static void parse_ble_read_adv_max_len_response(
     }
     osi_free(response);
 }
-#endif // #if (BLE_50_EXTEND_ADV_EN == TRUE)
+#endif // #if (BLE_50_EXTEND_ADV_EN == TRUE
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+static void parse_ble_read_periodic_adv_list_size_response(
+    BT_HDR *response,
+    uint16_t *periodic_adv_list_size_ptr)
+{
+
+    uint8_t *stream = read_command_complete_header(response, HCI_BLE_RD_PERIOD_ADV_LIST_SIZE, 1 /* bytes after */);
+    if (stream) {
+        // Size: 1 Octets ; Value: 0x01 to 0xFF ; Total number of Periodic Advertiser list entries that can be stored in the Controller
+        STREAM_TO_UINT8(*periodic_adv_list_size_ptr, stream);
+    }
+    osi_free(response);
+}
+#endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif // #if (BLE_50_FEATURE_SUPPORT == TRUE)
 
 
@@ -287,6 +301,9 @@ static const hci_packet_parser_t interface = {
 #if (BLE_50_EXTEND_ADV_EN == TRUE)
     parse_ble_read_adv_max_len_response,
 #endif // #if (BLE_50_EXTEND_ADV_EN == TRUE)
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+    parse_ble_read_periodic_adv_list_size_response,
+#endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif // #if (BLE_50_FEATURE_SUPPORT == TRUE)
     parse_ble_read_suggested_default_data_length_response
 };
diff --git a/components/bt/host/bluedroid/hci/include/hci/hci_packet_factory.h b/components/bt/host/bluedroid/hci/include/hci/hci_packet_factory.h
index 49b9602ee1..4c6e837714 100644
--- a/components/bt/host/bluedroid/hci/include/hci/hci_packet_factory.h
+++ b/components/bt/host/bluedroid/hci/include/hci/hci_packet_factory.h
@@ -48,6 +48,9 @@ typedef struct {
 #if (BLE_50_EXTEND_ADV_EN == TRUE)
     BT_HDR *(*make_read_max_adv_data_len)(void);
 #endif // #if (BLE_50_EXTEND_ADV_EN == TRUE)
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+    BT_HDR *(*read_periodic_adv_list_size)(void);
+#endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif // #if (BLE_50_FEATURE_SUPPORT == TRUE)
     BT_HDR *(*make_ble_read_suggested_default_data_length)(void);
     BT_HDR *(*make_ble_write_suggested_default_data_length)(uint16_t SuggestedMaxTxOctets, uint16_t SuggestedMaxTxTime);
diff --git a/components/bt/host/bluedroid/hci/include/hci/hci_packet_parser.h b/components/bt/host/bluedroid/hci/include/hci/hci_packet_parser.h
index 40d0f4f2f0..bba1ceed48 100644
--- a/components/bt/host/bluedroid/hci/include/hci/hci_packet_parser.h
+++ b/components/bt/host/bluedroid/hci/include/hci/hci_packet_parser.h
@@ -101,6 +101,12 @@ typedef struct {
         uint16_t *ble_ext_adv_data_max_len_ptr
     );
 #endif // #if (BLE_50_EXTEND_ADV_EN == TRUE)
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+    void (*parse_ble_read_periodic_adv_list_size_response) (
+        BT_HDR *response,
+        uint16_t *periodic_advertiser_list_size
+    );
+#endif // #if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif // #if (BLE_50_FEATURE_SUPPORT == TRUE)
     void (*parse_ble_read_suggested_default_data_length_response)(
         BT_HDR *response,
diff --git a/components/bt/host/bluedroid/stack/btm/btm_acl.c b/components/bt/host/bluedroid/stack/btm/btm_acl.c
index b241c68238..7f308f3752 100644
--- a/components/bt/host/bluedroid/stack/btm/btm_acl.c
+++ b/components/bt/host/bluedroid/stack/btm/btm_acl.c
@@ -2222,6 +2222,18 @@ void BTM_BleGetWhiteListSize(uint16_t *length)
     *length = p_cb->white_list_avail_size;
     return;
 }
+
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+void BTM_BleGetPeriodicAdvListSize(uint8_t *size)
+{
+    tBTM_BLE_CB *p_cb = &btm_cb.ble_ctr_cb;
+    if (p_cb->periodic_adv_list_size == 0) {
+        BTM_TRACE_WARNING("%s Periodic Adv list is full.", __func__);
+    }
+    *size = p_cb->periodic_adv_list_size;
+}
+#endif  //#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+
 #endif  ///BLE_INCLUDED == TRUE
 
 #if (BLE_HOST_READ_TX_POWER_EN == TRUE)
diff --git a/components/bt/host/bluedroid/stack/btm/btm_ble_bgconn.c b/components/bt/host/bluedroid/stack/btm/btm_ble_bgconn.c
index a84ca571cb..9d08c042be 100644
--- a/components/bt/host/bluedroid/stack/btm/btm_ble_bgconn.c
+++ b/components/bt/host/bluedroid/stack/btm/btm_ble_bgconn.c
@@ -423,6 +423,23 @@ void btm_ble_white_list_init(UINT8 white_list_size)
     btm_cb.ble_ctr_cb.white_list_avail_size = white_list_size;
 }
 
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+/*******************************************************************************
+**
+** Function         btm_ble_periodic_adv_list_init
+**
+** Description      Initialize the periodic advertiser list size.
+**
+** Parameters       periodic_adv_size: The size of the periodic advertiser list to be initialized.
+**
+*******************************************************************************/
+void btm_ble_periodic_adv_list_init(UINT8 periodic_adv_size)
+{
+    BTM_TRACE_DEBUG("%s white_list_size = %d", __func__, periodic_adv_size);
+    btm_cb.ble_ctr_cb.periodic_adv_list_size = periodic_adv_size;
+}
+#endif //#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+
 /*******************************************************************************
 **
 ** Function         btm_ble_add_2_white_list_complete
diff --git a/components/bt/host/bluedroid/stack/btm/btm_devctl.c b/components/bt/host/bluedroid/stack/btm/btm_devctl.c
index 3125ee775e..95c2baa565 100644
--- a/components/bt/host/bluedroid/stack/btm/btm_devctl.c
+++ b/components/bt/host/bluedroid/stack/btm/btm_devctl.c
@@ -199,6 +199,9 @@ static void reset_complete(void)
 
     if (controller->supports_ble()) {
         btm_ble_white_list_init(controller->get_ble_white_list_size());
+        #if (BLE_50_EXTEND_SYNC_EN == TRUE)
+        btm_ble_periodic_adv_list_init(controller->get_ble_periodic_adv_list_size());
+        #endif //#if (BLE_50_EXTEND_SYNC_EN == TRUE)
         l2c_link_processs_ble_num_bufs(controller->get_acl_buffer_count_ble());
     }
 #endif
diff --git a/components/bt/host/bluedroid/stack/btm/include/btm_ble_int.h b/components/bt/host/bluedroid/stack/btm/include/btm_ble_int.h
index 49f9ff8353..91693b1624 100644
--- a/components/bt/host/bluedroid/stack/btm/include/btm_ble_int.h
+++ b/components/bt/host/bluedroid/stack/btm/include/btm_ble_int.h
@@ -353,6 +353,10 @@ typedef struct {
     tBTM_BLE_SEL_CBACK *p_select_cback;
     /* white list information */
     UINT8 white_list_avail_size;
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+    /* periodic list information */
+    UINT8 periodic_adv_list_size;
+#endif //#if (BLE_50_EXTEND_SYNC_EN == TRUE)
     tBTM_UPDATE_WHITELIST_CBACK *update_wl_cb;
     tBTM_BLE_WL_STATE wl_state;
 
@@ -552,6 +556,9 @@ void btm_ble_channel_select_algorithm_evt(tBTM_BLE_CHANNEL_SEL_ALG *params);
 void btm_ble_periodic_adv_report_evt(tBTM_PERIOD_ADV_REPORT *params);
 void btm_ble_periodic_adv_sync_lost_evt(tBTM_BLE_PERIOD_ADV_SYNC_LOST *params);
 void btm_ble_periodic_adv_sync_establish_evt(tBTM_BLE_PERIOD_ADV_SYNC_ESTAB *params);
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+void btm_ble_periodic_adv_list_init(UINT8 periodic_adv_size);
+#endif //#if (BLE_50_EXTEND_SYNC_EN == TRUE)
 #endif // #if (BLE_50_FEATURE_SUPPORT == TRUE)
 
 #if (BLE_FEAT_PERIODIC_ADV_SYNC_TRANSFER == TRUE)
diff --git a/components/bt/host/bluedroid/stack/include/stack/btm_api.h b/components/bt/host/bluedroid/stack/include/stack/btm_api.h
index 8e51118f58..c501fafd70 100644
--- a/components/bt/host/bluedroid/stack/include/stack/btm_api.h
+++ b/components/bt/host/bluedroid/stack/include/stack/btm_api.h
@@ -3049,7 +3049,9 @@ tBTM_STATUS BTM_BleReadAdvTxPower(tBTM_CMPL_CB *p_cb);
 
 void BTM_BleGetWhiteListSize(uint16_t *length);
 
-
+#if (BLE_50_EXTEND_SYNC_EN == TRUE)
+void BTM_BleGetPeriodicAdvListSize(uint8_t *size);
+#endif //#if (BLE_50_EXTEND_SYNC_EN == TRUE)
 /*******************************************************************************
 **
 ** Function         BTM_ReadLinkQuality