Add a Carrier-config specific ratcheter of RATs.
Only reports transitions to higher RATs within a given family.
Reset when we move to a new cell.
Avoids costly propogation of RAT flapping within the family,
for example every outgoing data pops us into a higher RAT and
idle time pops us back down.
bug:27360321
Change-Id: I549d79c1c74325981bee284cef452bd096184d86
diff --git a/telephony/java/android/telephony/CarrierConfigManager.java b/telephony/java/android/telephony/CarrierConfigManager.java
index 44d89c1..e0de261 100644
--- a/telephony/java/android/telephony/CarrierConfigManager.java
+++ b/telephony/java/android/telephony/CarrierConfigManager.java
@@ -777,6 +777,16 @@
/** @hide */
public static final int CDMA_ROAMING_MODE_ANY = 2;
+ /**
+ * The families of Radio Access Technologies that will get clustered and ratcheted,
+ * ie, we will report transitions up within the family, but not down until we change
+ * cells. This prevents flapping between base technologies and higher techs that are
+ * granted on demand within the cell.
+ * @hide
+ */
+ public static final String KEY_RATCHET_RAT_FAMILIES =
+ "ratchet_rat_families";
+
/** The default value for every variable. */
private final static PersistableBundle sDefaults;
@@ -922,6 +932,11 @@
sDefaults.putStringArray(KEY_SIGNAL_DCFAILURE_RECEIVER_STRING_ARRAY, null);
sDefaults.putStringArray(KEY_SIGNAL_PCO_RECEIVER_STRING_ARRAY, null);
sDefaults.putString(KEY_CARRIER_SETUP_APP_STRING, "");
+
+ // Rat families: {GPRS, EDGE}, {EVDO, EVDO_A, EVDO_B}, {UMTS, HSPA, HSDPA, HSUPA, HSPAP}
+ // Order is important - lowest precidence first
+ sDefaults.putStringArray(KEY_RATCHET_RAT_FAMILIES,
+ new String[]{"1,2","7,8,12","3,11,9,10,15"});
}
/**
