diff --git a/protos/device_state.proto b/protos/device_state.proto
index 457890b..cec1fea 100644
--- a/protos/device_state.proto
+++ b/protos/device_state.proto
@@ -71,6 +71,8 @@ message  SwitchState{
 	bool fc = 15;
 	// 是否允许操作
 	bool yc = 16;
+	// 是否占用
+	bool occupied = 17;
 }
 //信号机状态
 message SignalState{