diff --git a/scheduler/schedule.cpp b/scheduler/schedule.cpp
index ff188d8..54a315c 100644
--- a/scheduler/schedule.cpp
+++ b/scheduler/schedule.cpp
@@ -1350,15 +1350,17 @@ void SensorScheduler::GenerateUpgradeSchedule() {
 
     long current_ts = GetLocalTs();
     long nth_wave_start_slice = abs(current_ts - start_timestamp_) / wave_form_send_interval_;
-    zlog_debug(zbt, "current ts: %ld, start ts:%ld", current_ts, start_timestamp_);
+    zlog_debug(zbt, "current ts: %ld, start ts:%ld, wave_form_send_interval_:%d", current_ts, start_timestamp_, wave_form_send_interval_);
     long current_wave_start_ts = nth_wave_start_slice * wave_form_send_interval_ + start_timestamp_;
-    long seconds_in_current_wave_slice = current_ts_ - current_wave_start_ts;
+    long seconds_in_current_wave_slice = current_ts - current_wave_start_ts;
     long nth_eigen_value_slice = seconds_in_current_wave_slice / eigen_value_send_interval_;
     long seconds_in_current_eigen_slice = seconds_in_current_wave_slice % eigen_value_send_interval_;
     int previous_wave_slice = wave_slice_num_per_eigen_interval_ * (nth_eigen_value_slice + 1);
-    if (previous_wave_slice < 0) {
-        zlog_error(zbt, "previous_wave_slice: %d", previous_wave_slice);
-    }
+    zlog_debug(zbt, "seconds_in_current_wave_slice:%d, nth_eigen_value_slice:%d, seconds_in_current_eigen_slice:%d, previous_wave_slice: %d", 
+                    seconds_in_current_wave_slice, nth_eigen_value_slice, seconds_in_current_eigen_slice, previous_wave_slice);
+    // if (previous_wave_slice < 0) {
+    //     zlog_error(zbt, "previous_wave_slice: %d", previous_wave_slice);
+    // }
     if (previous_wave_slice == available_slice_) {
         previous_wave_slice = 0;
     }
@@ -1376,8 +1378,7 @@ void SensorScheduler::GenerateUpgradeSchedule() {
         zlog_debug(zbt, "upgrade_size 1:%x", short_addr_list[0]);
         int j = 0;
         // int k = 0;
-        for (int i = previous_wave_slice+1; i < previous_wave_slice+1+available_slice_; i=i+2) {
-            
+        for (int i = previous_wave_slice+1; i < previous_wave_slice+1+available_slice_; i=i+2) {            
             j = i % available_slice_+1;
             if (j == 0) {
                 j = 1;