diff --git a/gnss/aidl/default/Gnss.cpp b/gnss/aidl/default/Gnss.cpp
index afb7b95..e296351 100644
--- a/gnss/aidl/default/Gnss.cpp
+++ b/gnss/aidl/default/Gnss.cpp
@@ -17,6 +17,7 @@
 #define LOG_TAG "GnssAidl"
 
 #include "Gnss.h"
+#include <inttypes.h>
 #include <log/log.h>
 #include "AGnss.h"
 #include "GnssBatching.h"
@@ -27,16 +28,24 @@
 #include "GnssNavigationMessageInterface.h"
 #include "GnssPsds.h"
 #include "GnssVisibilityControl.h"
+#include "Utils.h"
 
 namespace aidl::android::hardware::gnss {
+using ::android::hardware::gnss::common::Utils;
+using ndk::ScopedAStatus;
+using GnssSvInfo = IGnssCallback::GnssSvInfo;
+
+constexpr int TTFF_MILLIS = 2200;
 
 std::shared_ptr<IGnssCallback> Gnss::sGnssCallback = nullptr;
 
-ndk::ScopedAStatus Gnss::setCallback(const std::shared_ptr<IGnssCallback>& callback) {
-    ALOGD("Gnss::setCallback");
+Gnss::Gnss() : mMinIntervalMs(1000), mFirstFixReceived(false) {}
+
+ScopedAStatus Gnss::setCallback(const std::shared_ptr<IGnssCallback>& callback) {
+    ALOGD("setCallback");
     if (callback == nullptr) {
         ALOGE("%s: Null callback ignored", __func__);
-        return ndk::ScopedAStatus::fromExceptionCode(STATUS_INVALID_OPERATION);
+        return ScopedAStatus::fromExceptionCode(STATUS_INVALID_OPERATION);
     }
 
     sGnssCallback = callback;
@@ -50,13 +59,99 @@
         ALOGE("%s: Unable to invoke callback.gnssSetCapabilities", __func__);
     }
 
-    return ndk::ScopedAStatus::ok();
+    return ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus Gnss::close() {
-    ALOGD("Gnss::close");
+ScopedAStatus Gnss::start() {
+    ALOGD("start()");
+    if (mIsActive) {
+        ALOGW("Gnss has started. Restarting...");
+        stop();
+    }
+
+    mIsActive = true;
+    this->reportGnssStatusValue(IGnssCallback::GnssStatusValue::SESSION_BEGIN);
+    mThread = std::thread([this]() {
+        auto svStatus = filterBlocklistedSatellites(Utils::getMockSvInfoList());
+        this->reportSvStatus(svStatus);
+        if (!mFirstFixReceived) {
+            std::this_thread::sleep_for(std::chrono::milliseconds(TTFF_MILLIS));
+            mFirstFixReceived = true;
+        }
+        while (mIsActive == true) {
+            auto svStatus = filterBlocklistedSatellites(Utils::getMockSvInfoList());
+            this->reportSvStatus(svStatus);
+
+            mGnssPowerIndication->notePowerConsumption();
+            const auto location = Utils::getMockLocation();
+            this->reportLocation(location);
+            std::this_thread::sleep_for(std::chrono::milliseconds(mMinIntervalMs));
+        }
+    });
+    return ScopedAStatus::ok();
+}
+
+void Gnss::reportLocation(const GnssLocation& location) const {
+    std::unique_lock<std::mutex> lock(mMutex);
+    if (sGnssCallback == nullptr) {
+        ALOGE("%s: GnssCallback is null.", __func__);
+        return;
+    }
+    auto status = sGnssCallback->gnssLocationCb(location);
+    if (!status.isOk()) {
+        ALOGE("%s: Unable to invoke gnssLocationCb", __func__);
+    }
+    return;
+}
+
+void Gnss::reportSvStatus(const std::vector<GnssSvInfo>& svInfoList) const {
+    std::unique_lock<std::mutex> lock(mMutex);
+    if (sGnssCallback == nullptr) {
+        ALOGE("%s: sGnssCallback is null.", __func__);
+        return;
+    }
+    auto status = sGnssCallback->gnssSvStatusCb(svInfoList);
+    if (!status.isOk()) {
+        ALOGE("%s: Unable to invoke callback", __func__);
+    }
+}
+
+std::vector<GnssSvInfo> Gnss::filterBlocklistedSatellites(std::vector<GnssSvInfo> gnssSvInfoList) {
+    ALOGD("filterBlocklistedSatellites");
+    for (uint32_t i = 0; i < gnssSvInfoList.size(); i++) {
+        if (mGnssConfiguration->isBlocklisted(gnssSvInfoList[i])) {
+            gnssSvInfoList[i].svFlag &= ~(uint32_t)IGnssCallback::GnssSvFlags::USED_IN_FIX;
+        }
+    }
+    return gnssSvInfoList;
+}
+
+void Gnss::reportGnssStatusValue(const IGnssCallback::GnssStatusValue gnssStatusValue) const {
+    std::unique_lock<std::mutex> lock(mMutex);
+    if (sGnssCallback == nullptr) {
+        ALOGE("%s: sGnssCallback is null.", __func__);
+        return;
+    }
+    auto status = sGnssCallback->gnssStatusCb(gnssStatusValue);
+    if (!status.isOk()) {
+        ALOGE("%s: Unable to invoke gnssStatusCb", __func__);
+    }
+}
+
+ScopedAStatus Gnss::stop() {
+    ALOGD("stop");
+    mIsActive = false;
+    this->reportGnssStatusValue(IGnssCallback::GnssStatusValue::SESSION_END);
+    if (mThread.joinable()) {
+        mThread.join();
+    }
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus Gnss::close() {
+    ALOGD("close");
     sGnssCallback = nullptr;
-    return ndk::ScopedAStatus::ok();
+    return ScopedAStatus::ok();
 }
 
 ndk::ScopedAStatus Gnss::getExtensionAGnss(std::shared_ptr<IAGnss>* iAGnss) {
@@ -65,61 +160,93 @@
     return ndk::ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus Gnss::getExtensionPsds(std::shared_ptr<IGnssPsds>* iGnssPsds) {
-    ALOGD("Gnss::getExtensionPsds");
-    *iGnssPsds = SharedRefBase::make<GnssPsds>();
-    return ndk::ScopedAStatus::ok();
+ScopedAStatus Gnss::injectTime(int64_t timeMs, int64_t timeReferenceMs, int uncertaintyMs) {
+    ALOGD("injectTime. timeMs:%" PRId64 ", timeReferenceMs:%" PRId64 ", uncertaintyMs:%d", timeMs,
+          timeReferenceMs, uncertaintyMs);
+    return ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus Gnss::getExtensionGnssConfiguration(
+ScopedAStatus Gnss::injectLocation(const GnssLocation& location) {
+    ALOGD("injectLocation. lat:%lf, lng:%lf, acc:%f", location.latitudeDegrees,
+          location.longitudeDegrees, location.horizontalAccuracyMeters);
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus Gnss::injectBestLocation(const GnssLocation& location) {
+    ALOGD("injectBestLocation. lat:%lf, lng:%lf, acc:%f", location.latitudeDegrees,
+          location.longitudeDegrees, location.horizontalAccuracyMeters);
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus Gnss::deleteAidingData(GnssAidingData aidingDataFlags) {
+    ALOGD("deleteAidingData. flags:%d", (int)aidingDataFlags);
+    mFirstFixReceived = false;
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus Gnss::setPositionMode(GnssPositionMode, GnssPositionRecurrence, int minIntervalMs,
+                                    int /* preferredAccuracyMeters */, int /* preferredTimeMs */,
+                                    bool lowPowerMode) {
+    ALOGD("setPositionMode. minIntervalMs:%d, lowPowerMode:%d", minIntervalMs, (int)lowPowerMode);
+    mMinIntervalMs = minIntervalMs;
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus Gnss::getExtensionPsds(std::shared_ptr<IGnssPsds>* iGnssPsds) {
+    ALOGD("getExtensionPsds");
+    *iGnssPsds = SharedRefBase::make<GnssPsds>();
+    return ScopedAStatus::ok();
+}
+
+ScopedAStatus Gnss::getExtensionGnssConfiguration(
         std::shared_ptr<IGnssConfiguration>* iGnssConfiguration) {
-    ALOGD("Gnss::getExtensionGnssConfiguration");
+    ALOGD("getExtensionGnssConfiguration");
     if (mGnssConfiguration == nullptr) {
         mGnssConfiguration = SharedRefBase::make<GnssConfiguration>();
     }
     *iGnssConfiguration = mGnssConfiguration;
-    return ndk::ScopedAStatus::ok();
+    return ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus Gnss::getExtensionGnssPowerIndication(
+ScopedAStatus Gnss::getExtensionGnssPowerIndication(
         std::shared_ptr<IGnssPowerIndication>* iGnssPowerIndication) {
-    ALOGD("Gnss::getExtensionGnssPowerIndication");
+    ALOGD("getExtensionGnssPowerIndication");
     if (mGnssPowerIndication == nullptr) {
         mGnssPowerIndication = SharedRefBase::make<GnssPowerIndication>();
     }
 
     *iGnssPowerIndication = mGnssPowerIndication;
-    return ndk::ScopedAStatus::ok();
+    return ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus Gnss::getExtensionGnssMeasurement(
+ScopedAStatus Gnss::getExtensionGnssMeasurement(
         std::shared_ptr<IGnssMeasurementInterface>* iGnssMeasurement) {
-    ALOGD("Gnss::getExtensionGnssMeasurement");
+    ALOGD("getExtensionGnssMeasurement");
 
     *iGnssMeasurement = SharedRefBase::make<GnssMeasurementInterface>();
-    return ndk::ScopedAStatus::ok();
+    return ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus Gnss::getExtensionGnssBatching(std::shared_ptr<IGnssBatching>* iGnssBatching) {
-    ALOGD("Gnss::getExtensionGnssBatching");
+ScopedAStatus Gnss::getExtensionGnssBatching(std::shared_ptr<IGnssBatching>* iGnssBatching) {
+    ALOGD("getExtensionGnssBatching");
 
     *iGnssBatching = SharedRefBase::make<GnssBatching>();
-    return ndk::ScopedAStatus::ok();
+    return ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus Gnss::getExtensionGnssGeofence(std::shared_ptr<IGnssGeofence>* iGnssGeofence) {
-    ALOGD("Gnss::getExtensionGnssGeofence");
+ScopedAStatus Gnss::getExtensionGnssGeofence(std::shared_ptr<IGnssGeofence>* iGnssGeofence) {
+    ALOGD("getExtensionGnssGeofence");
 
     *iGnssGeofence = SharedRefBase::make<GnssGeofence>();
-    return ndk::ScopedAStatus::ok();
+    return ScopedAStatus::ok();
 }
 
-ndk::ScopedAStatus Gnss::getExtensionGnssNavigationMessage(
+ScopedAStatus Gnss::getExtensionGnssNavigationMessage(
         std::shared_ptr<IGnssNavigationMessageInterface>* iGnssNavigationMessage) {
-    ALOGD("Gnss::getExtensionGnssNavigationMessage");
+    ALOGD("getExtensionGnssNavigationMessage");
 
     *iGnssNavigationMessage = SharedRefBase::make<GnssNavigationMessageInterface>();
-    return ndk::ScopedAStatus::ok();
+    return ScopedAStatus::ok();
 }
 
 ndk::ScopedAStatus Gnss::getExtensionGnssDebug(std::shared_ptr<IGnssDebug>* iGnssDebug) {
diff --git a/gnss/aidl/default/Gnss.h b/gnss/aidl/default/Gnss.h
index 67fef94..384c862 100644
--- a/gnss/aidl/default/Gnss.h
+++ b/gnss/aidl/default/Gnss.h
@@ -25,6 +25,9 @@
 #include <aidl/android/hardware/gnss/BnGnssPowerIndication.h>
 #include <aidl/android/hardware/gnss/BnGnssPsds.h>
 #include <aidl/android/hardware/gnss/visibility_control/BnGnssVisibilityControl.h>
+#include <atomic>
+#include <mutex>
+#include <thread>
 #include "GnssConfiguration.h"
 #include "GnssPowerIndication.h"
 
@@ -32,8 +35,22 @@
 
 class Gnss : public BnGnss {
   public:
+    Gnss();
+    ~Gnss() { stop(); };
     ndk::ScopedAStatus setCallback(const std::shared_ptr<IGnssCallback>& callback) override;
+    ndk::ScopedAStatus start() override;
+    ndk::ScopedAStatus stop() override;
     ndk::ScopedAStatus close() override;
+
+    ndk::ScopedAStatus injectTime(int64_t timeMs, int64_t timeReferenceMs,
+                                  int uncertaintyMs) override;
+    ndk::ScopedAStatus injectLocation(const GnssLocation& location) override;
+    ndk::ScopedAStatus injectBestLocation(const GnssLocation& location) override;
+    ndk::ScopedAStatus deleteAidingData(GnssAidingData aidingDataFlags) override;
+    ndk::ScopedAStatus setPositionMode(GnssPositionMode mode, GnssPositionRecurrence recurrence,
+                                       int minIntervalMs, int preferredAccuracyMeters,
+                                       int preferredTimeMs, bool lowPowerMode) override;
+
     ndk::ScopedAStatus getExtensionPsds(std::shared_ptr<IGnssPsds>* iGnssPsds) override;
     ndk::ScopedAStatus getExtensionGnssConfiguration(
             std::shared_ptr<IGnssConfiguration>* iGnssConfiguration) override;
@@ -57,7 +74,20 @@
     std::shared_ptr<GnssPowerIndication> mGnssPowerIndication;
 
   private:
+    void reportLocation(const GnssLocation&) const;
+    void reportSvStatus(const std::vector<IGnssCallback::GnssSvInfo>& svInfoList) const;
+    std::vector<IGnssCallback::GnssSvInfo> filterBlocklistedSatellites(
+            std::vector<IGnssCallback::GnssSvInfo> gnssSvInfoList);
+    void reportGnssStatusValue(const IGnssCallback::GnssStatusValue gnssStatusValue) const;
+
     static std::shared_ptr<IGnssCallback> sGnssCallback;
+
+    std::atomic<long> mMinIntervalMs;
+    std::atomic<bool> mIsActive;
+    std::atomic<bool> mFirstFixReceived;
+    std::thread mThread;
+
+    mutable std::mutex mMutex;
 };
 
 }  // namespace aidl::android::hardware::gnss
diff --git a/gnss/aidl/default/GnssConfiguration.cpp b/gnss/aidl/default/GnssConfiguration.cpp
index 30e0d8c..96a1aa2 100644
--- a/gnss/aidl/default/GnssConfiguration.cpp
+++ b/gnss/aidl/default/GnssConfiguration.cpp
@@ -49,4 +49,14 @@
     return (mBlocklistedSourceSet.find(source) != mBlocklistedSourceSet.end());
 }
 
+bool GnssConfiguration::isBlocklisted(const IGnssCallback::GnssSvInfo& gnssSvInfo) const {
+    std::unique_lock<std::recursive_mutex> lock(mMutex);
+    if (mBlocklistedConstellationSet.find(gnssSvInfo.constellation) !=
+        mBlocklistedConstellationSet.end()) {
+        return true;
+    }
+    BlocklistedSource source = {.constellation = gnssSvInfo.constellation, .svid = gnssSvInfo.svid};
+    return (mBlocklistedSourceSet.find(source) != mBlocklistedSourceSet.end());
+}
+
 }  // namespace aidl::android::hardware::gnss
diff --git a/gnss/aidl/default/GnssConfiguration.h b/gnss/aidl/default/GnssConfiguration.h
index 491733c..3c77f32 100644
--- a/gnss/aidl/default/GnssConfiguration.h
+++ b/gnss/aidl/default/GnssConfiguration.h
@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <aidl/android/hardware/gnss/BnGnssCallback.h>
 #include <aidl/android/hardware/gnss/BnGnssConfiguration.h>
 #include <android/hardware/gnss/2.1/IGnssCallback.h>
 #include <mutex>
@@ -62,6 +63,7 @@
     ndk::ScopedAStatus setBlocklist(const vector<BlocklistedSource>& blocklist) override;
 
     bool isBlocklistedV2_1(const GnssSvInfoV2_1& gnssSvInfo) const;
+    bool isBlocklisted(const IGnssCallback::GnssSvInfo& gnssSvInfo) const;
 
   private:
     BlocklistedSourceSet mBlocklistedSourceSet;