diff --git a/protocol/userProxy.proto b/protocol/userProxy.proto
index 7eb878e8224097273c1d81043a4ebc273dc65958..2ac061ec6953af0340918ef3178db4df2caeebf8 100644
--- a/protocol/userProxy.proto
+++ b/protocol/userProxy.proto
@@ -413,32 +413,38 @@ message SvipUpgrade {
     string group_id = 3;
 }
 
-/* id == 152 用户进房 */
+/* id == 152 用户进房 上行 */
 message EnterRoom {
     string group_id = 1;
 }
 
-/* id == 153 用户离房 */
+/* id == 153 用户离房 上行 */
 message LeaveRoom {
     string group_id = 1;
 }
 
-/* id == 154 房间心跳 */
+/* id == 154 房间心跳 上行 */
 message RoomHeartBeat {
     string group_id = 1;
 }
 
-/* id == 155 麦位变化 */
+/* id == 155 麦位变化 下行 */
 message GroupMicChange {
-    string group_id = 1;
-    uint32 i = 2;
-    bool lock = 3;
-    bool forbid = 4;
-    bool micForbid = 5;
-    string externalId = 6;
-    string agoraId = 7;
-    int64 timestamp = 8;
-    MicUserData user = 9;
+    string seqId = 1;
+    string group_id = 2;
+    uint32 i = 3;
+    bool lock = 4;
+    bool forbid = 5;
+    bool micForbid = 6;
+    string externalId = 7;
+    string agoraId = 8;
+    int64 timestamp = 9;
+    MicUserData user = 10;
+}
+
+/* id == 156 麦位变化确认 上行 */
+message GroupMicChangeRsp {
+    string seqId = 1;
 }
 
 message MicUserData {