diff --git a/scheduler/schedule.cpp b/scheduler/schedule.cpp
index 20d3009..099dd54 100644
--- a/scheduler/schedule.cpp
+++ b/scheduler/schedule.cpp
@@ -456,9 +456,23 @@ int SensorScheduler::GetNextDuration(uint16_t short_addr, bool &z, int &next_tas
     } else {
         id = iter->second;
     }
-    long current_ts = GetLocalTs(); 
+    current_ts_ = GetLocalTs();
+    // CleanIdleOccupiedSet(current_ts_);
+
+    nth_wave_start_slice_ = (current_ts_ - start_timestamp_) / wave_form_send_interval_;
+    current_wave_start_ts_ = nth_wave_start_slice_ * wave_form_send_interval_ + start_timestamp_;
+    seconds_in_current_wave_slice_ = current_ts_ - current_wave_start_ts_;
+    nth_eigen_value_slice_ = seconds_in_current_wave_slice_ / eigen_value_send_interval_;
+    seconds_in_current_eigen_slice_ = seconds_in_current_wave_slice_ % eigen_value_send_interval_;
+    ts_in_eigen_slice_ = false;
+
+    if (seconds_in_current_eigen_slice_ < 60 - 3) {
+        ts_in_eigen_slice_ = true;
+    }
+
+    // long current_ts = GetLocalTs(); 
     long next_ts = CalcNextTimestamp(id, short_addr, z, next_task_id);
-    int duration = next_ts - current_ts;
+    int duration = next_ts - current_ts_;
     if (duration < 10) {
         zlog_debug(zbt, "[%d:%x] [Nxt] exception duration:%d, adjust to 25", id, short_addr,duration);
         duration = 25;