--- /dev/null
+package android.telephony;
+
+import static android.telephony.ServiceState.DUPLEX_MODE_FDD;
+import static android.telephony.ServiceState.DUPLEX_MODE_TDD;
+import static android.telephony.ServiceState.DUPLEX_MODE_UNKNOWN;
+
+import android.telephony.AccessNetworkConstants.EutranBand;
+import android.telephony.ServiceState.DuplexMode;
+
+
+/**
+ * Utilities to map between radio constants.
+ *
+ * @hide
+ */
+public class AccessNetworkUtils {
+
+ // do not instantiate
+ private AccessNetworkUtils() {}
+
+ public static final int INVALID_BAND = -1;
+
+ /**
+ * Gets the duplex mode for the given EUTRAN operating band.
+ *
+ * <p>See 3GPP 36.101 sec 5.5-1 for calculation
+ *
+ * @param band The EUTRAN band number
+ * @return The duplex mode of the given EUTRAN band
+ */
+ @DuplexMode
+ public static int getDuplexModeForEutranBand(int band) {
+ if (band == INVALID_BAND) {
+ return DUPLEX_MODE_UNKNOWN;
+ }
+
+ if (band >= EutranBand.BAND_68) {
+ return DUPLEX_MODE_UNKNOWN;
+ } else if (band >= EutranBand.BAND_65) {
+ return DUPLEX_MODE_FDD;
+ } else if (band >= EutranBand.BAND_47) {
+ return DUPLEX_MODE_UNKNOWN;
+ } else if (band >= EutranBand.BAND_33) {
+ return DUPLEX_MODE_TDD;
+ } else if (band >= EutranBand.BAND_1) {
+ return DUPLEX_MODE_FDD;
+ }
+
+ return DUPLEX_MODE_UNKNOWN;
+ }
+
+ /**
+ * Gets the EUTRAN Operating band for a given downlink EARFCN.
+ *
+ * <p>See 3GPP 36.101 sec 5.7.3-1 for calculation.
+ *
+ * @param earfcn The downlink EARFCN
+ * @return Operating band number, or {@link #INVALID_BAND} if no corresponding band exists
+ */
+ public static int getOperatingBandForEarfcn(int earfcn) {
+ if (earfcn > 67535) {
+ return INVALID_BAND;
+ } else if (earfcn >= 67366) {
+ return INVALID_BAND; // band 67 only for CarrierAgg
+ } else if (earfcn >= 66436) {
+ return EutranBand.BAND_66;
+ } else if (earfcn >= 65536) {
+ return EutranBand.BAND_65;
+ } else if (earfcn > 54339) {
+ return INVALID_BAND;
+ } else if (earfcn >= 46790 /* inferred from the end range of BAND_45 */) {
+ return EutranBand.BAND_46;
+ } else if (earfcn >= 46590) {
+ return EutranBand.BAND_45;
+ } else if (earfcn >= 45590) {
+ return EutranBand.BAND_44;
+ } else if (earfcn >= 43590) {
+ return EutranBand.BAND_43;
+ } else if (earfcn >= 41590) {
+ return EutranBand.BAND_42;
+ } else if (earfcn >= 39650) {
+ return EutranBand.BAND_41;
+ } else if (earfcn >= 38650) {
+ return EutranBand.BAND_40;
+ } else if (earfcn >= 38250) {
+ return EutranBand.BAND_39;
+ } else if (earfcn >= 37750) {
+ return EutranBand.BAND_38;
+ } else if (earfcn >= 37550) {
+ return EutranBand.BAND_37;
+ } else if (earfcn >= 36950) {
+ return EutranBand.BAND_36;
+ } else if (earfcn >= 36350) {
+ return EutranBand.BAND_35;
+ } else if (earfcn >= 36200) {
+ return EutranBand.BAND_34;
+ } else if (earfcn >= 36000) {
+ return EutranBand.BAND_33;
+ } else if (earfcn > 10359) {
+ return INVALID_BAND;
+ } else if (earfcn >= 9920) {
+ return INVALID_BAND; // band 32 only for CarrierAgg
+ } else if (earfcn >= 9870) {
+ return EutranBand.BAND_31;
+ } else if (earfcn >= 9770) {
+ return EutranBand.BAND_30;
+ } else if (earfcn >= 9660) {
+ return INVALID_BAND; // band 29 only for CarrierAgg
+ } else if (earfcn >= 9210) {
+ return EutranBand.BAND_28;
+ } else if (earfcn >= 9040) {
+ return EutranBand.BAND_27;
+ } else if (earfcn >= 8690) {
+ return EutranBand.BAND_26;
+ } else if (earfcn >= 8040) {
+ return EutranBand.BAND_25;
+ } else if (earfcn >= 7700) {
+ return EutranBand.BAND_24;
+ } else if (earfcn >= 7500) {
+ return EutranBand.BAND_23;
+ } else if (earfcn >= 6600) {
+ return EutranBand.BAND_22;
+ } else if (earfcn >= 6450) {
+ return EutranBand.BAND_21;
+ } else if (earfcn >= 6150) {
+ return EutranBand.BAND_20;
+ } else if (earfcn >= 6000) {
+ return EutranBand.BAND_19;
+ } else if (earfcn >= 5850) {
+ return EutranBand.BAND_18;
+ } else if (earfcn >= 5730) {
+ return EutranBand.BAND_17;
+ } else if (earfcn > 5379) {
+ return INVALID_BAND;
+ } else if (earfcn >= 5280) {
+ return EutranBand.BAND_14;
+ } else if (earfcn >= 5180) {
+ return EutranBand.BAND_13;
+ } else if (earfcn >= 5010) {
+ return EutranBand.BAND_12;
+ } else if (earfcn >= 4750) {
+ return EutranBand.BAND_11;
+ } else if (earfcn >= 4150) {
+ return EutranBand.BAND_10;
+ } else if (earfcn >= 3800) {
+ return EutranBand.BAND_9;
+ } else if (earfcn >= 3450) {
+ return EutranBand.BAND_8;
+ } else if (earfcn >= 2750) {
+ return EutranBand.BAND_7;
+ } else if (earfcn >= 2650) {
+ return EutranBand.BAND_6;
+ } else if (earfcn >= 2400) {
+ return EutranBand.BAND_5;
+ } else if (earfcn >= 1950) {
+ return EutranBand.BAND_4;
+ } else if (earfcn >= 1200) {
+ return EutranBand.BAND_3;
+ } else if (earfcn >= 600) {
+ return EutranBand.BAND_2;
+ } else if (earfcn >= 0) {
+ return EutranBand.BAND_1;
+ }
+
+ return INVALID_BAND;
+ }
+}