diff --git a/app/src/main/java/org/opencord/olt/internalapi/AccessDeviceMeterService.java b/app/src/main/java/org/opencord/olt/internalapi/AccessDeviceMeterService.java
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+++ b/app/src/main/java/org/opencord/olt/internalapi/AccessDeviceMeterService.java
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+/*
+ * Copyright 2016-present Open Networking Foundation
+ *
+ * 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.opencord.olt.internalapi;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.common.collect.ImmutableSet;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.meter.MeterId;
+import org.onosproject.net.meter.MeterKey;
+import org.opencord.sadis.BandwidthProfileInformation;
+
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+
+/**
+ * Olt service for meter operations.
+ */
+public interface AccessDeviceMeterService {
+
+    /**
+     * Returns information about bandwidthProfile-meterKey (device / meter) mappings
+     * that have been programmed in the data-plane.
+     *
+     * @return an immutable map of bandwidthProfile-meterKey (device / meter) mappings
+     */
+    ImmutableMap<String, Set<MeterKey>> getBpMeterMappings();
+
+    /**
+     * Adds a bandwidthProfile-meterKey (device / meter) mapping that have been programmed
+     * in the data plane.
+     *
+     * @param deviceId         the access device id
+     * @param meterId          the meter id that is mapped to the bandwidth profile
+     * @param bandwidthProfile the bandwidth profile id
+     */
+    void addMeterIdToBpMapping(DeviceId deviceId, MeterId meterId, String bandwidthProfile);
+
+    /**
+     * Returns the meter id for a given bandwidth profile.
+     *
+     * @param deviceId         the access device id
+     * @param bandwidthProfile the bandwidth profile id
+     * @return the meter id
+     */
+    MeterId getMeterIdFromBpMapping(DeviceId deviceId, String bandwidthProfile);
+
+    /**
+     * Returns information about device-meter relations that have been programmed in the
+     * data-plane.
+     *
+     * @return an immutable set of device-meter mappings
+     */
+    ImmutableSet<MeterKey> getProgMeters();
+
+    /**
+     * Creates a meter and sends it to the device.
+     *
+     * @param deviceId    the access device id
+     * @param bpInfo      the bandwidth profile information
+     * @param meterFuture the meter future to indicate whether the meter creation is
+     *                    successful or not.
+     * @return meter id that is generated for the given parameters
+     */
+    MeterId createMeter(DeviceId deviceId, BandwidthProfileInformation bpInfo,
+                        CompletableFuture<Object> meterFuture);
+
+
+}