diff --git a/apps/actn-mdsc/tetunnel-pce/src/main/java/org/onosproject/actn/mdsc/pce/TeTunnelPce.java b/apps/actn-mdsc/tetunnel-pce/src/main/java/org/onosproject/actn/mdsc/pce/TeTunnelPce.java
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+++ b/apps/actn-mdsc/tetunnel-pce/src/main/java/org/onosproject/actn/mdsc/pce/TeTunnelPce.java
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+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.actn.mdsc.pce;
+
+import org.onosproject.tetunnel.api.tunnel.TeTunnel;
+import org.onosproject.tetunnel.api.tunnel.path.TeRouteSubobject;
+
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * PCE which calculates paths for TE tunnels.
+ */
+public interface TeTunnelPce {
+
+    static final int PRIORITY_HIGHEST = 255;
+    static final int PRIORITY_HIGH = PRIORITY_HIGHEST * 3 / 4;
+    static final int PRIORITY_MEDIUM = PRIORITY_HIGHEST / 2;
+    static final int PRIORITY_LOW = PRIORITY_HIGHEST / 4;
+    static final int PRIORITY_LOWEST = 0;
+
+    /**
+     * Returns priority of this PCE.
+     *
+     * @return priority of this PCE
+     */
+    int getPriority();
+
+    /**
+     * Signifies whether this PCE is suitable for the specified TE tunnel.
+     *
+     * @param teTunnel tunnel to check
+     * @return true if this PCE can calculate path for the TE tunnel
+     */
+    boolean isSuitable(TeTunnel teTunnel);
+
+    /**
+     * Calculates available paths for the specified TE tunnel.
+     *
+     * @param teTunnel tunnel information to be calculated
+     * @return available paths for the specified TE tunnel
+     */
+    Collection<List<TeRouteSubobject>> computePaths(TeTunnel teTunnel);
+}