diff --git a/radio/1.1/Android.mk b/radio/1.1/Android.mk
index 305b661..f844d07 100644
--- a/radio/1.1/Android.mk
+++ b/radio/1.1/Android.mk
@@ -75,6 +75,82 @@
 LOCAL_GENERATED_SOURCES += $(GEN)
 
 #
+# Build types.hal (KeepaliveRequest)
+#
+GEN := $(intermediates)/android/hardware/radio/V1_1/KeepaliveRequest.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.1::types.KeepaliveRequest
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (KeepaliveStatus)
+#
+GEN := $(intermediates)/android/hardware/radio/V1_1/KeepaliveStatus.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.1::types.KeepaliveStatus
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (KeepaliveStatusCode)
+#
+GEN := $(intermediates)/android/hardware/radio/V1_1/KeepaliveStatusCode.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.1::types.KeepaliveStatusCode
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (KeepaliveType)
+#
+GEN := $(intermediates)/android/hardware/radio/V1_1/KeepaliveType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.1::types.KeepaliveType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
 # Build types.hal (NetworkScanRequest)
 #
 GEN := $(intermediates)/android/hardware/radio/V1_1/NetworkScanRequest.java
@@ -256,6 +332,8 @@
 $(GEN): $(HIDL)
 $(GEN): PRIVATE_HIDL := $(HIDL)
 $(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/IRadioResponse.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
 $(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
 $(GEN): PRIVATE_CUSTOM_TOOL = \
         $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
@@ -343,6 +421,82 @@
 LOCAL_GENERATED_SOURCES += $(GEN)
 
 #
+# Build types.hal (KeepaliveRequest)
+#
+GEN := $(intermediates)/android/hardware/radio/V1_1/KeepaliveRequest.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.1::types.KeepaliveRequest
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (KeepaliveStatus)
+#
+GEN := $(intermediates)/android/hardware/radio/V1_1/KeepaliveStatus.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.1::types.KeepaliveStatus
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (KeepaliveStatusCode)
+#
+GEN := $(intermediates)/android/hardware/radio/V1_1/KeepaliveStatusCode.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.1::types.KeepaliveStatusCode
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
+# Build types.hal (KeepaliveType)
+#
+GEN := $(intermediates)/android/hardware/radio/V1_1/KeepaliveType.java
+$(GEN): $(HIDL)
+$(GEN): PRIVATE_HIDL := $(HIDL)
+$(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/types.hal
+$(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
+$(GEN): PRIVATE_CUSTOM_TOOL = \
+        $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
+        -Ljava \
+        -randroid.hardware:hardware/interfaces \
+        -randroid.hidl:system/libhidl/transport \
+        android.hardware.radio@1.1::types.KeepaliveType
+
+$(GEN): $(LOCAL_PATH)/types.hal
+	$(transform-generated-source)
+LOCAL_GENERATED_SOURCES += $(GEN)
+
+#
 # Build types.hal (NetworkScanRequest)
 #
 GEN := $(intermediates)/android/hardware/radio/V1_1/NetworkScanRequest.java
@@ -524,6 +678,8 @@
 $(GEN): $(HIDL)
 $(GEN): PRIVATE_HIDL := $(HIDL)
 $(GEN): PRIVATE_DEPS := $(LOCAL_PATH)/IRadioResponse.hal
+$(GEN): PRIVATE_DEPS += $(LOCAL_PATH)/types.hal
+$(GEN): $(LOCAL_PATH)/types.hal
 $(GEN): PRIVATE_OUTPUT_DIR := $(intermediates)
 $(GEN): PRIVATE_CUSTOM_TOOL = \
         $(PRIVATE_HIDL) -o $(PRIVATE_OUTPUT_DIR) \
diff --git a/radio/1.1/IRadio.hal b/radio/1.1/IRadio.hal
index b3e21e7..084c156 100644
--- a/radio/1.1/IRadio.hal
+++ b/radio/1.1/IRadio.hal
@@ -99,4 +99,24 @@
      * Response function is IRadioResponse.stopNetworkScanResponse()
      */
     oneway stopNetworkScan(int32_t serial);
+
+    /**
+     * Start a Keepalive session (for IPsec)
+     *
+     * @param serial Serial number of request.
+     * @param keepalive A request structure containing all necessary info to describe a keepalive
+     *
+     * Response function is IRadioResponse.startKeepaliveResponse()
+     */
+    oneway startKeepalive(int32_t serial, KeepaliveRequest keepalive);
+
+    /**
+     * Stop an ongoing Keepalive session (for IPsec)
+     *
+     * @param serial Serial number of request.
+     * @param sessionHandle The handle that was provided by IRadioResponse.startKeepaliveResponse
+     *
+     * Response function is IRadioResponse.stopKeepaliveResponse()
+     */
+    oneway stopKeepalive(int32_t serial, int32_t sessionHandle);
 };
diff --git a/radio/1.1/IRadioIndication.hal b/radio/1.1/IRadioIndication.hal
index 27b6ec2..a0ad9b2 100644
--- a/radio/1.1/IRadioIndication.hal
+++ b/radio/1.1/IRadioIndication.hal
@@ -39,4 +39,15 @@
      * @param result Network scan result as NetworkScanResult defined in types.hal
      */
     oneway networkScanResult(RadioIndicationType type, NetworkScanResult result);
-};
\ No newline at end of file
+
+    /**
+     * Indicates a status update for a particular Keepalive session. This must include
+     * a handle for a previous session and should include a status update regarding the
+     * state of a keepalive. Unsolicited keepalive status reports should never be
+     * PENDING as unsolicited status should only be sent when known.
+     *
+     * @param type Type of radio indication
+     * @param status Status information for a Keepalive session
+     */
+    oneway keepaliveStatus(RadioIndicationType type, KeepaliveStatus status);
+};
diff --git a/radio/1.1/IRadioResponse.hal b/radio/1.1/IRadioResponse.hal
index 7415252..4e7bf43 100644
--- a/radio/1.1/IRadioResponse.hal
+++ b/radio/1.1/IRadioResponse.hal
@@ -71,4 +71,26 @@
      *   RadioError:MODEM_ERR
      */
     oneway stopNetworkScanResponse(RadioResponseInfo info);
+
+    /**
+     * @param info Response info struct containing response type, serial no. and error
+     * @param status Status object containing a new handle and a current status. The
+     * status returned here may be PENDING to indicate that the radio has not yet
+     * processed the keepalive request.
+     *
+     * Valid errors returned:
+     *   RadioError:NONE
+     *   RadioError:NO_RESOURCES
+     *   RadioError:INVALID_ARGUMENTS
+     */
+    oneway startKeepaliveResponse(RadioResponseInfo info, KeepaliveStatus status);
+
+    /**
+     * @param info Response info struct containing response type, serial no. and error
+     *
+     * Valid errors returned:
+     *   RadioError:NONE
+     *   RadioError:INVALID_ARGUMENTS
+     */
+    oneway stopKeepaliveResponse(RadioResponseInfo info);
 };
diff --git a/radio/1.1/types.hal b/radio/1.1/types.hal
index 245d96c..c9f4bc9 100644
--- a/radio/1.1/types.hal
+++ b/radio/1.1/types.hal
@@ -132,6 +132,19 @@
     COMPLETE = 2,                           // The result contains the last part of the scan results
 };
 
+enum KeepaliveType : int32_t {
+    NATT_IPV4 = 0,                          // Keepalive specified by RFC 3948 Sec. 2.3 using IPv4
+    NATT_IPV6 = 1,                          // Keepalive specified by RFC 3948 Sec. 2.3 using IPv6
+};
+
+enum KeepaliveStatusCode : int32_t {
+    ACTIVE,                                 // Keepalive is currently active
+    INACTIVE,                               // Keepalive is inactive, which indicates an error
+    PENDING,                                // Requested keepalive has not yet been processed by
+                                            // the modem. Only allowed in a RESPONSE message to
+                                            // a REQUEST
+};
+
 struct RadioAccessSpecifier {
     RadioAccessNetworks radioAccessNetwork; // The type of network to scan
     vec<GeranBands> geranBands;             // Valid only if radioAccessNetwork = GERAN
@@ -162,3 +175,24 @@
     RadioError error;                       // The error code of the incremental result
     vec<CellInfo> networkInfos;             // List of network information as CellInfo
 };
+
+struct KeepaliveRequest {
+    KeepaliveType type;                     // The format of the keepalive packet
+    vec<uint8_t> sourceAddress;             // source address with type = family, in network
+                                            // byte order
+    int32_t sourcePort;                     // source port if relevant for the given type
+                                            // INT_MAX: 0x7FFFFFFF denotes that the field is unused
+    vec<uint8_t> destinationAddress;        // destination address with type = family, in network
+                                            // byte order
+    int32_t destinationPort;                // destination if relevant for the given type
+                                            // INT_MAX: 0x7FFFFFFF denotes that the field is unused
+    int32_t maxKeepaliveIntervalMillis;     // the max interval between packets, in milliseconds
+    int32_t cid;                            // Context ID, returned in setupDataCallResponse
+                                            // that uniquely identifies the data call to which
+                                            // this keepalive must applied
+};
+
+struct KeepaliveStatus {
+    int32_t sessionHandle;                  // the sessionHandle provided by the api
+    KeepaliveStatusCode code;               // status for the given keepalive
+};