diff --git a/openolt.proto b/openolt.proto
index c4d4fd0..ed69539 100644
--- a/openolt.proto
+++ b/openolt.proto
@@ -81,6 +81,13 @@
         };
     }
 
+    rpc FlowRemove(Flow) returns (Empty) {
+        option (google.api.http) = {
+          post: "/v1/FlowRemove"
+          body: "*"
+        };
+    }
+
     rpc HeartbeatCheck(Empty) returns (Heartbeat) {
         option (google.api.http) = {
           post: "/v1/HeartbeatCheck"
@@ -102,6 +109,13 @@
         };
     }
 
+    rpc GetDeviceInfo(Empty) returns (DeviceInfo) {
+        option (google.api.http) = {
+            post: "/v1/GetDeviceInfo"
+            body: "*"
+        };
+    }
+
     rpc Reboot(Empty) returns (Empty) {
          option (google.api.http) = {
             post: "/v1/Reboot"
@@ -109,6 +123,13 @@
         };
     }
 
+    rpc CollectStatistics(Empty) returns (Empty) {
+        option (google.api.http) = {
+            post: "/v1/CollectStatistics"
+            body: "*"
+        };
+    }
+
     rpc EnableIndication(Empty) returns (stream Indication) {}
 }
 
@@ -178,6 +199,7 @@
 }
 
 message PacketIndication {
+    string intf_type = 5;		// nni, pon, unknown
     fixed32 intf_id = 1;
     fixed32 gemport_id = 2;
     fixed32 flow_id = 3;
@@ -197,6 +219,7 @@
     fixed32 onu_id = 2;
     SerialNumber serial_number = 3;
     fixed32 pir = 4;   // peak information rate assigned to onu
+    fixed32 alloc_id = 5;
 }
 
 message OmciMsg {
@@ -216,6 +239,21 @@
     bytes pkt = 2;
 }
 
+message DeviceInfo {
+    string vendor = 1;
+    string model = 2;
+    string hardware_version = 3;
+    string firmware_version = 4;
+    string technology = 5;
+    fixed32 onu_id_start = 6;
+    fixed32 onu_id_end = 7;
+    fixed32 alloc_id_start = 8;
+    fixed32 alloc_id_end = 9;
+    fixed32 gemport_id_start = 10;
+    fixed32 gemport_id_end = 11;
+    fixed32 pon_ports = 12;
+}
+
 message Classifier {
     fixed32 o_tpid = 1;
     fixed32 o_vid = 2;
@@ -251,15 +289,16 @@
 }
 
 message Flow {
-    fixed32 access_intf_id = 1;
-    fixed32 onu_id = 2;
+    sfixed32 access_intf_id = 1;
+    sfixed32 onu_id = 2;
     fixed32 flow_id = 3;
     string flow_type = 4;	// upstream, downstream, broadcast, multicast
-    fixed32 network_intf_id = 5;
-    fixed32 gemport_id = 6;
+    sfixed32 alloc_id = 10;
+    sfixed32 network_intf_id = 5;
+    sfixed32 gemport_id = 6;
     Classifier classifier = 7;
     Action action = 8;
-    fixed32 priority = 9;
+    sfixed32 priority = 9;
 }
 
 message SerialNumber {
@@ -367,4 +406,4 @@
 }
 
 
-message Empty {}
+message Empty {}
\ No newline at end of file