diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000000000000000000000000000000000000..10f7e69f8b8d715269f578ee392addaeeeed197a
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "sky-php7ext/protos"]
+	path = sky-php7ext/protos
+	url = https://github.com/apache/incubator-skywalking-data-collect-protocol.git
diff --git a/sky-php7ext/protos b/sky-php7ext/protos
new file mode 160000
index 0000000000000000000000000000000000000000..b66fa070fd647662f06497e4ed3657eb258cb6e9
--- /dev/null
+++ b/sky-php7ext/protos
@@ -0,0 +1 @@
+Subproject commit b66fa070fd647662f06497e4ed3657eb258cb6e9
diff --git a/sky-php7ext/protos/ApplicationRegisterService.proto b/sky-php7ext/protos/ApplicationRegisterService.proto
deleted file mode 100644
index 567f6e66cacad229fddc444bb27cc732e1691346..0000000000000000000000000000000000000000
--- a/sky-php7ext/protos/ApplicationRegisterService.proto
+++ /dev/null
@@ -1,24 +0,0 @@
-syntax = "proto3";
-
-option java_multiple_files = true;
-option java_package = "org.apache.skywalking.apm.network.proto";
-
-
-//register service for ApplicationCode, this service is called when service starts.
-service ApplicationRegisterService {
-    rpc applicationCodeRegister (Application) returns (ApplicationMapping) {
-    }
-}
-
-message KeyWithIntegerValue {
-    string key = 1;
-    int32 value = 2;
-}
-
-message Application {
-    string applicationCode = 1;
-}
-
-message ApplicationMapping {
-    KeyWithIntegerValue application = 1;
-}
diff --git a/sky-php7ext/protos/DiscoveryService.proto b/sky-php7ext/protos/DiscoveryService.proto
deleted file mode 100644
index 7d4d57585d9255c52d1728dbbe2403ce347d01cb..0000000000000000000000000000000000000000
--- a/sky-php7ext/protos/DiscoveryService.proto
+++ /dev/null
@@ -1,65 +0,0 @@
-syntax = "proto3";
-
-option java_multiple_files = true;
-option java_package = "org.apache.skywalking.apm.network.proto";
-
-
-service InstanceDiscoveryService {
-    rpc registerInstance (ApplicationInstance) returns (ApplicationInstanceMapping) {
-    }
-}
-
-message ApplicationInstance {
-    int32 applicationId = 1;
-    string agentUUID = 2;
-    int64 registerTime = 3;
-    OSInfo osinfo = 4;
-}
-
-message ApplicationInstanceMapping {
-    int32 applicationId = 1;
-    int32 applicationInstanceId = 2;
-}
-
-message ApplicationInstanceRecover {
-    int32 applicationId = 1;
-    int32 applicationInstanceId = 2;
-    int64 registerTime = 3;
-    OSInfo osinfo = 4;
-}
-
-message ApplicationInstanceHeartbeat {
-    int32 applicationInstanceId = 1;
-    int64 heartbeatTime = 2;
-}
-
-message OSInfo {
-    string osName = 1;
-    string hostname = 2;
-    int32 processNo = 3;
-    repeated string ipv4s = 4;
-}
-
-//discovery service for ServiceName by Network address or application code
-service ServiceNameDiscoveryService {
-    rpc discovery (ServiceNameCollection) returns (ServiceNameMappingCollection) {
-    }
-}
-
-message ServiceNameCollection {
-    repeated ServiceNameElement elements = 1;
-}
-
-message ServiceNameMappingCollection {
-    repeated ServiceNameMappingElement elements = 1;
-}
-
-message ServiceNameMappingElement {
-    int32 serviceId = 1;
-    ServiceNameElement element = 2;
-}
-
-message ServiceNameElement {
-    string serviceName = 1;
-    int32 applicationId = 2;
-}
diff --git a/sky-php7ext/protos/TraceSegmentService.proto b/sky-php7ext/protos/TraceSegmentService.proto
deleted file mode 100644
index 8b8aa512bbc87f413707073a257f468b2378f0aa..0000000000000000000000000000000000000000
--- a/sky-php7ext/protos/TraceSegmentService.proto
+++ /dev/null
@@ -1,93 +0,0 @@
-syntax = "proto3";
-
-option java_multiple_files = true;
-option java_package = "org.apache.skywalking.apm.network.proto";
-
-
-service TraceSegmentService {
-    rpc collect (stream UpstreamSegment) returns (Downstream) {
-    }
-}
-
-message Downstream {
-}
-
-message KeyWithStringValue {
-    string key = 1;
-    string value = 2;
-}
-
-message UpstreamSegment {
-    repeated UniqueId globalTraceIds = 1;
-    bytes segment = 2; // the byte array of TraceSegmentObject
-}
-
-message UniqueId {
-    repeated int64 idParts = 1;
-}
-
-message TraceSegmentObject {
-    UniqueId traceSegmentId = 1;
-    repeated SpanObject spans = 2;
-    int32 applicationId = 3;
-    int32 applicationInstanceId = 4;
-    bool isSizeLimited = 5;
-}
-
-message TraceSegmentReference {
-    RefType refType = 1;
-    UniqueId parentTraceSegmentId = 2;
-    int32 parentSpanId = 3;
-    int32 parentApplicationInstanceId = 4;
-    string networkAddress = 5;
-    int32 networkAddressId = 6;
-    int32 entryApplicationInstanceId = 7;
-    string entryServiceName = 8;
-    int32 entryServiceId = 9;
-    string parentServiceName = 10;
-    int32 parentServiceId = 11;
-}
-
-message SpanObject {
-    int32 spanId = 1;
-    int32 parentSpanId = 2;
-    int64 startTime = 3;
-    int64 endTime = 4;
-    repeated TraceSegmentReference refs = 5;
-    int32 operationNameId = 6;
-    string operationName = 7;
-    int32 peerId = 8;
-    string peer = 9;
-    SpanType spanType = 10;
-    SpanLayer spanLayer = 11;
-    int32 componentId = 12;
-    string component = 13;
-    bool isError = 14;
-    repeated KeyWithStringValue tags = 15;
-    repeated LogMessage logs = 16;
-}
-
-enum RefType {
-    CrossProcess = 0;
-    CrossThread = 1;
-}
-
-enum SpanType {
-    Entry = 0;
-    Exit = 1;
-    Local = 2;
-}
-
-enum SpanLayer {
-    Unknown = 0;
-    Database = 1;
-    RPCFramework = 2;
-    Http = 3;
-    MQ = 4;
-    Cache = 5;
-}
-
-message LogMessage {
-    int64 time = 1;
-    repeated KeyWithStringValue data = 2;
-}