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1、问题背景

         在手机开发过程中，经常遇见各种紧急号码问题，在此特意总结下紧急号码相关知识。

2、紧急号码来源

         在MTK RILD EccNumberSource.h中，定义了如下几种紧急号码来源。

按优先级排序介绍如下

2.1、SOURCE_NETWORK

网络下发，通过DL下发。

可以参考：
https://www.sharetechnote.com/html/Handbook_UMTS_EmergencyNumberList.html

MTK平台通过 +CEN1， +CEN2 来进行上报
//代表 73001 网络支持紧急号码上报
10-20  12:31:53.418255      1430      1443  I  AT                  :  [0]  AT<  +CEN1:1,730,01 (RIL_URC_READER, tid:494604676352)
//网络上报紧急号码 133，Category 为 31 即代表该号码同时为 Police，Ambulance，Fire Brigade， Marine Guard， Marine Guard 的服务台
10-20  12:31:53.418329      1430      1443  I  AT                  :  [0]  AT<  +CEN2:31,133 (RIL_URC_READER, tid:494604676352

2.2、SOURCE_SIM

USIM卡通过+ESIMECC消息上报卡中ECC信息
CSIM卡通过+CECC消息上报ECC信息

12-12 17:43:50.745462 1268 1275 V RtcEccNumberController: [0] [parseSimEcc] line: +ESIMECC: 0
12-12 17:43:50.745484 1268 1275 V RtcEccNumberController: [0] [parseSimEcc] There is no ECC number stored in SIM

2.3、SOURCE_CONFIG

MTK RILD 中默认配置路径来自 EccNumberSource.h

#define ECC_OM_FILE_PATH   "/system/vendor/etc/ecc_list.xml"

2.4、SOURCE_DEFAULT

协议规定 3GPP TS 22.101必须是紧急号码

#define ECC_DEFAULT        "112,911"
#define ECC_DEFAULT_NO_SIM "112,911,000,08,110,118,119,999"
    /**
     * Indicates the number is available as default. Per the reference, 112, 911 must always be
     * available; additionally, 000, 08, 110, 999, 118 and 119 must be available when sim is not
     * present.
     */
    SOURCE_DEFAULT      = 1 << 3,

2.5、其他来源

    暂时没用到，暂时不做处理
    /**
     * Indicates the number is from the OEM property.
     * Will mapping to AOSP source type MODEM_CONFIG
     */
    SOURCE_OEM_PROPERTY = 1 << 4,
    /**
     * Indicates the number is from framework
     * Will mapping to AOSP source type MODEM_CONFIG
     */
    SOURCE_FRAMEWORK    = 1 << 5,
    /**
     * Indicates the number is from test property which add through
     * Engineer Mode -> Telephony -> Emergency Numbers
     * Will mapping to AOSP source type MODEM_CONFIG
     */
    SOURCE_TEST         = 1 << 6

 2.6、Android FRAMEWORK

packages\services\Telephony\ecc\input\eccdata.txt

Android Q上google添加了相关ecc紧急号码配置，EmergencyNumber.java

对应EMERGENCY_NUMBER_SOURCE_DATABASE

3、紧急号码来分类

对于"/system/vendor/etc/ecc_list.xml"配置来说

typedef enum {CONDITION_NO_SIM   = 0, // Only ECC when NO SIMCONDITION_ALWAYS   = 1, // Always ECCCONDITION_MMI      = 2, // Fake/Special ECC (normal call setup flow)CONDITION_SIM_ONLY = 3, // Only ECC when SIM insertCONDITION_NEVER    = 4  // Not ECC in any condition (ex: customer service number)
} EmergencyNumberCondition;

condition 表示紧急号码类型，真紧急，假紧急，无卡紧急

真紧急 ATDE 空口EMERGENCY_SETUP

假紧急  ATD 空口SETUP

enum class EmergencyServiceCategory : int32_t {/*** General emergency call, all categories*/UNSPECIFIED = 0,POLICE = 1 /* 1 << 0 */,AMBULANCE = 2 /* 1 << 1 */,FIRE_BRIGADE = 4 /* 1 << 2 */,MARINE_GUARD = 8 /* 1 << 3 */,MOUNTAIN_RESCUE = 16 /* 1 << 4 */,/*** Manually Initiated eCall (MIeC)*/MIEC = 32 /* 1 << 5 */,/*** Automatically Initiated eCall (AIeC)*/AIEC = 64 /* 1 << 6 */,
};

category表示对应的紧急号码类型

相关配置表如下