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 96658e8cb1..68dba6bdf9 100644
--- a/components/bt/host/bluedroid/api/esp_gap_ble_api.c
+++ b/components/bt/host/bluedroid/api/esp_gap_ble_api.c
@@ -138,7 +138,7 @@ esp_err_t esp_ble_gap_update_conn_params(esp_ble_conn_update_params_t *params)
     if (ESP_BLE_IS_VALID_PARAM(params->min_int, ESP_BLE_CONN_INT_MIN, ESP_BLE_CONN_INT_MAX) &&
         ESP_BLE_IS_VALID_PARAM(params->max_int, ESP_BLE_CONN_INT_MIN, ESP_BLE_CONN_INT_MAX) &&
         ESP_BLE_IS_VALID_PARAM(params->timeout, ESP_BLE_CONN_SUP_TOUT_MIN, ESP_BLE_CONN_SUP_TOUT_MAX) &&
-        (params->latency <= ESP_BLE_CONN_LATENCY_MAX || params->latency == ESP_BLE_CONN_PARAM_UNDEF) &&
+        (params->latency <= ESP_BLE_CONN_LATENCY_MAX) &&
         ((params->timeout * 10) >= ((1 + params->latency) * ((params->max_int * 5) >> 1))) && params->min_int <= params->max_int) {
 
         msg.sig = BTC_SIG_API_CALL;
@@ -354,7 +354,7 @@ esp_err_t esp_ble_gap_set_prefer_conn_params(esp_bd_addr_t bd_addr,
     if (ESP_BLE_IS_VALID_PARAM(min_conn_int, ESP_BLE_CONN_INT_MIN, ESP_BLE_CONN_INT_MAX) &&
         ESP_BLE_IS_VALID_PARAM(max_conn_int, ESP_BLE_CONN_INT_MIN, ESP_BLE_CONN_INT_MAX) &&
         ESP_BLE_IS_VALID_PARAM(supervision_tout, ESP_BLE_CONN_SUP_TOUT_MIN, ESP_BLE_CONN_SUP_TOUT_MAX) &&
-        (slave_latency <= ESP_BLE_CONN_LATENCY_MAX || slave_latency == ESP_BLE_CONN_PARAM_UNDEF) &&
+        (slave_latency <= ESP_BLE_CONN_LATENCY_MAX) &&
         ((supervision_tout * 10) >= ((1 + slave_latency) * ((max_conn_int * 5) >> 1))) && min_conn_int <= max_conn_int) {
 
         msg.sig = BTC_SIG_API_CALL;
@@ -1317,7 +1317,7 @@ esp_err_t esp_ble_gap_prefer_ext_connect_params_set(esp_bd_addr_t addr,
         if (ESP_BLE_IS_VALID_PARAM(phy_1m_conn_params->interval_min, ESP_BLE_CONN_INT_MIN, ESP_BLE_CONN_INT_MAX) &&
             ESP_BLE_IS_VALID_PARAM(phy_1m_conn_params->interval_max, ESP_BLE_CONN_INT_MIN, ESP_BLE_CONN_INT_MAX) &&
             ESP_BLE_IS_VALID_PARAM(phy_1m_conn_params->supervision_timeout, ESP_BLE_CONN_SUP_TOUT_MIN, ESP_BLE_CONN_SUP_TOUT_MAX) &&
-            (phy_1m_conn_params->latency <= ESP_BLE_CONN_LATENCY_MAX || phy_1m_conn_params->latency == ESP_BLE_CONN_PARAM_UNDEF) &&
+            (phy_1m_conn_params->latency <= ESP_BLE_CONN_LATENCY_MAX) &&
             ((phy_1m_conn_params->supervision_timeout * 10) >= ((1 + phy_1m_conn_params->latency) * ((phy_1m_conn_params->interval_max * 5) >> 1))) &&
             (phy_1m_conn_params->interval_min <= phy_1m_conn_params->interval_max)) {
 
@@ -1341,7 +1341,7 @@ esp_err_t esp_ble_gap_prefer_ext_connect_params_set(esp_bd_addr_t addr,
         if (ESP_BLE_IS_VALID_PARAM(phy_2m_conn_params->interval_min, ESP_BLE_CONN_INT_MIN, ESP_BLE_CONN_INT_MAX) &&
             ESP_BLE_IS_VALID_PARAM(phy_2m_conn_params->interval_max, ESP_BLE_CONN_INT_MIN, ESP_BLE_CONN_INT_MAX) &&
             ESP_BLE_IS_VALID_PARAM(phy_2m_conn_params->supervision_timeout, ESP_BLE_CONN_SUP_TOUT_MIN, ESP_BLE_CONN_SUP_TOUT_MAX) &&
-            (phy_2m_conn_params->latency <= ESP_BLE_CONN_LATENCY_MAX || phy_2m_conn_params->latency == ESP_BLE_CONN_PARAM_UNDEF) &&
+            (phy_2m_conn_params->latency <= ESP_BLE_CONN_LATENCY_MAX) &&
             ((phy_2m_conn_params->supervision_timeout * 10) >= ((1 + phy_2m_conn_params->latency) * ((phy_2m_conn_params->interval_max * 5) >> 1))) &&
             (phy_2m_conn_params->interval_min <= phy_2m_conn_params->interval_max)) {
 
@@ -1365,7 +1365,7 @@ esp_err_t esp_ble_gap_prefer_ext_connect_params_set(esp_bd_addr_t addr,
         if (ESP_BLE_IS_VALID_PARAM(phy_coded_conn_params->interval_min, ESP_BLE_CONN_INT_MIN, ESP_BLE_CONN_INT_MAX) &&
             ESP_BLE_IS_VALID_PARAM(phy_coded_conn_params->interval_max, ESP_BLE_CONN_INT_MIN, ESP_BLE_CONN_INT_MAX) &&
             ESP_BLE_IS_VALID_PARAM(phy_coded_conn_params->supervision_timeout, ESP_BLE_CONN_SUP_TOUT_MIN, ESP_BLE_CONN_SUP_TOUT_MAX) &&
-            (phy_coded_conn_params->latency <= ESP_BLE_CONN_LATENCY_MAX || phy_coded_conn_params->latency == ESP_BLE_CONN_PARAM_UNDEF) &&
+            (phy_coded_conn_params->latency <= ESP_BLE_CONN_LATENCY_MAX) &&
             ((phy_coded_conn_params->supervision_timeout * 10) >= ((1 + phy_coded_conn_params->latency) * ((phy_coded_conn_params->interval_max * 5) >> 1))) &&
             (phy_coded_conn_params->interval_min <= phy_coded_conn_params->interval_max)) {
 
diff --git a/components/bt/host/bluedroid/api/include/api/esp_bt_defs.h b/components/bt/host/bluedroid/api/include/api/esp_bt_defs.h
index 7bfad55c35..7e0df27bd7 100644
--- a/components/bt/host/bluedroid/api/include/api/esp_bt_defs.h
+++ b/components/bt/host/bluedroid/api/include/api/esp_bt_defs.h
@@ -132,11 +132,9 @@ typedef uint8_t esp_link_key[ESP_BT_OCTET16_LEN];      /* Link Key */
 #define ESP_BLE_CONN_LATENCY_MAX            499          /*!< relate to ESP_BLE_CONN_LATENCY_MAX in stack/btm_ble_api.h */
 #define ESP_BLE_CONN_SUP_TOUT_MIN           0x000A       /*!< relate to BTM_BLE_CONN_SUP_TOUT_MIN in stack/btm_ble_api.h */
 #define ESP_BLE_CONN_SUP_TOUT_MAX           0x0C80       /*!< relate to ESP_BLE_CONN_SUP_TOUT_MAX in stack/btm_ble_api.h */
-#define ESP_BLE_CONN_PARAM_UNDEF            0xffff       /* use this value when a specific value not to be overwritten */ /* relate to ESP_BLE_CONN_PARAM_UNDEF in stack/btm_ble_api.h */
-#define ESP_BLE_SCAN_PARAM_UNDEF            0xffffffff   /* relate to ESP_BLE_SCAN_PARAM_UNDEF in stack/btm_ble_api.h */
 
 /// Check the param is valid or not
-#define ESP_BLE_IS_VALID_PARAM(x, min, max)  (((x) >= (min) && (x) <= (max)) || ((x) == ESP_BLE_CONN_PARAM_UNDEF))
+#define ESP_BLE_IS_VALID_PARAM(x, min, max)  (((x) >= (min) && (x) <= (max)) )
 
 /// UUID type
 typedef struct {
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 f01e85e57d..38594b7783 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
@@ -18,7 +18,7 @@ extern tBTA_BLE_ADV_DATA *gl_bta_scan_rsp_data_ptr;
 #define gl_bta_scan_rsp_data    (*gl_bta_scan_rsp_data_ptr)
 #endif
 
-#define BLE_ISVALID_PARAM(x, min, max)  (((x) >= (min) && (x) <= (max)) || ((x) == ESP_BLE_CONN_PARAM_UNDEF))
+#define BLE_ISVALID_PARAM(x, min, max)  (((x) >= (min) && (x) <= (max)))
 
 typedef enum {
 #if (BLE_42_FEATURE_SUPPORT == TRUE)
diff --git a/components/bt/host/bluedroid/stack/l2cap/l2c_ble.c b/components/bt/host/bluedroid/stack/l2cap/l2c_ble.c
index 8d9f510f55..ecfb4bc795 100644
--- a/components/bt/host/bluedroid/stack/l2cap/l2c_ble.c
+++ b/components/bt/host/bluedroid/stack/l2cap/l2c_ble.c
@@ -1429,7 +1429,7 @@ UINT32 CalConnectParamTimeout(tL2C_LCB *p_lcb)
     UINT32 timeout = 6;
     if (p_lcb != NULL){
         //1.25 * conn_int *(1+ latency) *32
-        timeout = (40 * ( 1 + p_lcb->current_used_conn_latency) * p_lcb->current_used_conn_interval + 1000) / 1000;
+        timeout = (40 * ( 1 + p_lcb->current_used_conn_latency) * p_lcb->current_used_conn_interval + 1.25 * p_lcb->waiting_update_conn_max_interval + 1000) / 1000;
         if (timeout < 1){
             timeout = 1;
         }else if (timeout > 120){