diff --git a/apm-network/src/main/proto/TraceSegmentService.proto b/apm-network/src/main/proto/TraceSegmentService.proto
index 31af71946..608faa70f 100644
--- a/apm-network/src/main/proto/TraceSegmentService.proto
+++ b/apm-network/src/main/proto/TraceSegmentService.proto
@@ -10,6 +10,11 @@ service TraceSegmentService {
     }
 }
 
+message UpstreamSegment {
+    repeated string globalTraceIds = 1;
+    bytes segment = 2; // the byte array of TraceSegmentObject
+}
+
 message TraceSegmentObject {
     string traceSegmentId = 1;
     repeated TraceSegmentReference refs = 2;
@@ -22,8 +27,8 @@ message TraceSegmentObject {
 message TraceSegmentReference {
     string parentTraceSegmentId = 1;
     int32 parentSpanId = 2;
-    repeated int32 serviceChains = 3;
-    int32 parentApplicationId = 4;
+    int32 parentApplicationId = 3;
+    string networkAddress = 4;
     int32 networkAddressId = 5;
 }
 
@@ -33,13 +38,14 @@ message SpanObject {
     int64 startTime = 3;
     int64 endTime = 4;
     int32 operationNameId = 5;
-    int32 peerNetworkAddressId = 6;
-    SpanType spanType = 7;
-    SpanLayer spanLayer = 8;
-    string component = 9;
-    bool isError = 10;
-    repeated KeyValue tags = 11;
-    repeated LogMessage logs = 12;
+    int32 peerId = 6;
+    string peer = 7;
+    SpanType spanType = 8;
+    SpanLayer spanLayer = 9;
+    string component = 10;
+    bool isError = 11;
+    repeated KeyValue tags = 12;
+    repeated LogMessage logs = 13;
 }
 
 enum SpanType {
diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/component/AbstractComponent.java b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/component/AbstractComponent.java
new file mode 100644
index 000000000..ef42cd2aa
--- /dev/null
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/component/AbstractComponent.java
@@ -0,0 +1,18 @@
+package org.skywalking.apm.agent.core.context.component;
+
+/**
+ * @author wusheng
+ */
+public abstract class AbstractComponent {
+    private int id;
+    private String name;
+
+    protected AbstractComponent(int id, String name) {
+        this.id = id;
+        this.name = name;
+    }
+
+    public int getId() {
+        return id;
+    }
+}
diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/tag/Tags.java b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/tag/Tags.java
index 6e924850e..d2802b74e 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/tag/Tags.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/tag/Tags.java
@@ -38,21 +38,7 @@ public final class Tags {
         private static final String HTTP_LAYER = "http";
         private static final String MQ_LAYER = "mq";
 
-        public static void asDB(AbstractSpan span) {
-            SPAN_LAYER_TAG.set(span, DB_LAYER);
-        }
 
-        public static void asRPCFramework(AbstractSpan span) {
-            SPAN_LAYER_TAG.set(span, RPC_FRAMEWORK_LAYER);
-        }
-
-        public static void asHttp(AbstractSpan span) {
-            SPAN_LAYER_TAG.set(span, HTTP_LAYER);
-        }
-
-        public static void asMQ(AbstractSpan span) {
-            SPAN_LAYER_TAG.set(span, MQ_LAYER);
-        }
     }
 
     /**
diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/AbstractSpan.java b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/AbstractSpan.java
index b02f4cb8c..eff8d6e95 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/AbstractSpan.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/AbstractSpan.java
@@ -8,6 +8,8 @@ package org.skywalking.apm.agent.core.context.trace;
  * @author wusheng
  */
 public interface AbstractSpan {
+    void setLayer(SpanLayer layer);
+
     /**
      * Set a key:value tag on the Span.
      *
diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java
index 161a0b496..239f1b685 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/AbstractTracingSpan.java
@@ -2,6 +2,7 @@ package org.skywalking.apm.agent.core.context.trace;
 
 import java.util.LinkedList;
 import java.util.List;
+import org.skywalking.apm.agent.core.context.component.AbstractComponent;
 import org.skywalking.apm.agent.core.context.util.KeyValuePair;
 import org.skywalking.apm.agent.core.context.util.ThrowableTransformer;
 import org.skywalking.apm.agent.core.dictionary.DictionaryUtil;
@@ -18,6 +19,7 @@ public abstract class AbstractTracingSpan implements AbstractSpan {
     protected List<KeyValuePair> tags;
     protected String operationName;
     protected int operationId;
+    protected SpanLayer layer;
     /**
      * The start time of this Span.
      */
@@ -31,6 +33,8 @@ public abstract class AbstractTracingSpan implements AbstractSpan {
      */
     protected boolean errorOccurred = false;
 
+    protected int componentId = 0;
+
     /**
      * Log is a concept from OpenTracing spec.
      * <p>
@@ -113,4 +117,13 @@ public abstract class AbstractTracingSpan implements AbstractSpan {
     public int getOperationId() {
         return operationId;
     }
+
+    @Override
+    public void setLayer(SpanLayer layer) {
+        this.layer = layer;
+    }
+
+    public void setComponent(AbstractComponent component){
+        this.componentId = component.getId();
+    }
 }
diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/SpanLayer.java b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/SpanLayer.java
new file mode 100644
index 000000000..25b4a67a0
--- /dev/null
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/SpanLayer.java
@@ -0,0 +1,27 @@
+package org.skywalking.apm.agent.core.context.trace;
+
+/**
+ * @author wusheng
+ */
+public enum SpanLayer {
+    DB,
+    RPC_FRAMEWORK,
+    HTTP,
+    MQ;
+
+    public static void asDB(AbstractSpan span) {
+        span.setLayer(SpanLayer.DB);
+    }
+
+    public static void asRPCFramework(AbstractSpan span) {
+        span.setLayer(SpanLayer.RPC_FRAMEWORK);
+    }
+
+    public static void asHttp(AbstractSpan span) {
+        span.setLayer(SpanLayer.HTTP);
+    }
+
+    public static void asMQ(AbstractSpan span) {
+        span.setLayer(SpanLayer.MQ);
+    }
+}
diff --git a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/SpanType.java b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/SpanType.java
index ec13a4a1d..a73e6962e 100644
--- a/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/SpanType.java
+++ b/apm-sniffer/apm-agent-core/src/main/java/org/skywalking/apm/agent/core/context/trace/SpanType.java
@@ -6,5 +6,5 @@ package org.skywalking.apm.agent.core.context.trace;
 public enum SpanType {
     ENTRY,
     EXIT,
-    LOCAL;
+    LOCAL
 }