diff --git a/protos/device_state.proto b/protos/device_state.proto
index f70d693..134609d 100644
--- a/protos/device_state.proto
+++ b/protos/device_state.proto
@@ -244,7 +244,7 @@ message TrainDynamicState {
 
 }
 
-// vobc发过来的列车信息
+// vobc发过来的列车信息 包括 (驾驶台和车载)
 message TrainVobcState {
   // 生命信号	每个周期+1
   int32 lifeSignal = 1;