diff --git a/android/AGnssRil.cpp b/android/AGnssRil.cpp
new file mode 100644
index 00000000..0cf79a32
--- /dev/null
+++ b/android/AGnssRil.cpp
@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2017, The Linux Foundation. All rights reserved.
+ * Not a Contribution
+ */
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#define LOG_TAG "LocSvc__AGnssRilInterface"
+
+#include <log_util.h>
+#include <dlfcn.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sstream>
+#include <string>
+#include "Gnss.h"
+#include "AGnssRil.h"
+typedef void* (getLocationInterface)();
+
+namespace android {
+namespace hardware {
+namespace gnss {
+namespace V1_0 {
+namespace implementation {
+
+static bool sendConnectionEvent(const bool connected, const uint8_t type);
+
+AGnssRil::AGnssRil(Gnss* gnss) : mGnss(gnss) {
+    ENTRY_LOG_CALLFLOW();
+}
+
+AGnssRil::~AGnssRil() {
+    ENTRY_LOG_CALLFLOW();
+}
+
+Return<bool> AGnssRil::updateNetworkState(bool connected, NetworkType type, bool roaming) {
+    ENTRY_LOG_CALLFLOW();
+
+    // for XTRA
+    sendConnectionEvent(connected, (uint8_t)type);
+
+    return true;
+}
+
+// for XTRA
+static inline int createSocket() {
+    int socketFd = -1;
+
+    if ((socketFd = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
+        LOC_LOGe("create socket error. reason:%s", strerror(errno));
+
+     } else {
+        const char* socketPath = "/data/misc/location/xtra/socket_hal_xtra";
+        struct sockaddr_un addr = { .sun_family = AF_UNIX };
+        snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", socketPath);
+
+        if (::connect(socketFd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
+            LOC_LOGe("cannot connect to XTRA. reason:%s", strerror(errno));
+            if (::close(socketFd)) {
+                LOC_LOGe("close socket error. reason:%s", strerror(errno));
+            }
+            socketFd = -1;
+        }
+    }
+
+    return socketFd;
+}
+
+static inline void closeSocket(const int socketFd) {
+    if (socketFd >= 0) {
+        if(::close(socketFd)) {
+            LOC_LOGe("close socket error. reason:%s", strerror(errno));
+        }
+    }
+}
+
+static inline bool sendConnectionEvent(const bool connected, const uint8_t type) {
+    int socketFd = createSocket();
+    if (socketFd < 0) {
+        LOC_LOGe("XTRA unreachable. sending failed.");
+        return false;
+    }
+
+    std::stringstream ss;
+    ss <<  "connection";
+    ss << " " << (connected ? "1" : "0");
+    ss << " " << (int)type;
+    ss << "\n"; // append seperator
+
+    const std::string& data = ss.str();
+    int remain = data.length();
+    ssize_t sent = 0;
+
+    while (remain > 0 &&
+          (sent = ::send(socketFd, data.c_str() + (data.length() - remain),
+                       remain, MSG_NOSIGNAL)) > 0) {
+        remain -= sent;
+    }
+
+    if (sent < 0) {
+        LOC_LOGe("sending error. reason:%s", strerror(errno));
+    }
+
+    closeSocket(socketFd);
+
+    return (remain == 0);
+}
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace gnss
+}  // namespace hardware
+}  // namespace android
diff --git a/android/AGnssRil.h b/android/AGnssRil.h
new file mode 100644
index 00000000..61216d8f
--- /dev/null
+++ b/android/AGnssRil.h
@@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2017, The Linux Foundation. All rights reserved.
+ * Not a Contribution
+ */
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef ANDROID_HARDWARE_GNSS_V1_0_AGNSSRIL_H_
+#define ANDROID_HARDWARE_GNSS_V1_0_AGNSSRIL_H_
+
+#include <android/hardware/gnss/1.0/IAGnssRil.h>
+#include <hidl/Status.h>
+#include <location_interface.h>
+
+namespace android {
+namespace hardware {
+namespace gnss {
+namespace V1_0 {
+namespace implementation {
+
+using ::android::hardware::gnss::V1_0::IAGnssRil;
+using ::android::hardware::gnss::V1_0::IAGnssRilCallback;
+using ::android::hardware::Return;
+using ::android::hardware::Void;
+using ::android::hardware::hidl_vec;
+using ::android::hardware::hidl_string;
+using ::android::sp;
+
+struct Gnss;
+/*
+ * Extended interface for AGNSS RIL support. An Assisted GNSS Radio Interface Layer interface
+ * allows the GNSS chipset to request radio interface layer information from Android platform.
+ * Examples of such information are reference location, unique subscriber ID, phone number string
+ * and network availability changes. Also contains wrapper methods to allow methods from
+ * IAGnssiRilCallback interface to be passed into the conventional implementation of the GNSS HAL.
+ */
+struct AGnssRil : public IAGnssRil {
+    AGnssRil(Gnss* gnss);
+    ~AGnssRil();
+
+    /*
+     * Methods from ::android::hardware::gnss::V1_0::IAGnssRil follow.
+     * These declarations were generated from IAGnssRil.hal.
+     */
+    Return<void> setCallback(const sp<IAGnssRilCallback>& /*callback*/) override {
+        return Void();
+    }
+    Return<void> setRefLocation(const IAGnssRil::AGnssRefLocation& /*agnssReflocation*/) override {
+        return Void();
+    }
+    Return<bool> setSetId(IAGnssRil::SetIDType /*type*/, const hidl_string& /*setid*/) override {
+        return false;
+    }
+    Return<bool> updateNetworkAvailability(bool /*available*/,
+                                    const hidl_string& /*apn*/) override {
+        return false;
+    }
+    Return<bool> updateNetworkState(bool connected, NetworkType type, bool roaming) override;
+
+ private:
+    Gnss* mGnss = nullptr;
+};
+
+}  // namespace implementation
+}  // namespace V1_0
+}  // namespace gnss
+}  // namespace hardware
+}  // namespace android
+
+#endif  // ANDROID_HARDWARE_GNSS_V1_0_AGNSSRIL_H_
diff --git a/android/Android.mk b/android/Android.mk
index a9b0d4bc..e3c3d500 100644
--- a/android/Android.mk
+++ b/android/Android.mk
@@ -14,6 +14,7 @@ LOCAL_SRC_FILES := \
     GnssNi.cpp \
     GnssConfiguration.cpp \
     GnssDebug.cpp \
+    AGnssRil.cpp
 
 LOCAL_SRC_FILES += \
     location_api/LocationUtil.cpp \
diff --git a/android/Gnss.cpp b/android/Gnss.cpp
index d17077cc..9a362f0a 100644
--- a/android/Gnss.cpp
+++ b/android/Gnss.cpp
@@ -316,6 +316,11 @@ Return<sp<IGnssDebug>> Gnss::getExtensionGnssDebug() {
     return mGnssDebug;
 }
 
+Return<sp<IAGnssRil>> Gnss::getExtensionAGnssRil() {
+    mGnssRil = new AGnssRil(this);
+    return mGnssRil;
+}
+
 IGnss* HIDL_FETCH_IGnss(const char* hal) {
     ENTRY_LOG_CALLFLOW();
     IGnss* iface = nullptr;
diff --git a/android/Gnss.h b/android/Gnss.h
index 99c5e40b..e4589d60 100644
--- a/android/Gnss.h
+++ b/android/Gnss.h
@@ -22,6 +22,7 @@
 #define ANDROID_HARDWARE_GNSS_V1_1_GNSS_H
 
 #include <AGnss.h>
+#include <AGnssRil.h>
 #include <GnssBatching.h>
 #include <GnssConfiguration.h>
 #include <GnssGeofencing.h>
@@ -91,9 +92,7 @@ struct Gnss : public IGnss {
     Return<sp<IGnssGeofencing>> getExtensionGnssGeofencing() override;
     Return<sp<IGnssBatching>> getExtensionGnssBatching() override;
 
-    inline Return<sp<IAGnssRil>> getExtensionAGnssRil() override {
-        return nullptr;
-    }
+    Return<sp<IAGnssRil>> getExtensionAGnssRil() override;
 
     inline Return<sp<IGnssNavigationMessage>> getExtensionGnssNavigationMessage() override {
         return nullptr;
@@ -130,6 +129,7 @@ struct Gnss : public IGnss {
     sp<GnssGeofencing> mGnssGeofencingIface = nullptr;
     sp<GnssBatching> mGnssBatching = nullptr;
     sp<IGnssDebug> mGnssDebug = nullptr;
+    sp<AGnssRil> mGnssRil = nullptr;
 
     GnssAPIClient* mApi = nullptr;
     sp<IGnssCallback> mGnssCbIface = nullptr;