lte语音业务-CSFB

lte语音业务-CSFB

一 相关概念

我们知道,2g网络存在ps域 与cs域分别为 GPRS GSM网络,3g没有区分ps cs,4g的域变成了IMS 和 EPC

lte网络语音解决方案有如下几种

方案 特点
双通双待 两套收发器,分别驻留lte网络和2g/3g网络
CSFB 回落到2g或者3g网络
volte ims域,4g高清语音
ott 类似微信的语音通信方式

关于cs ps ims域介绍
cs 电路交换域,用于语音通信
ps 分组交换域 用于数据通信
ims 多媒体子系统,支持语音业务

本文主要介绍下CSFB相关内容,至于volte后面再说
现在终端如果使用4g网络,并且不支持volte,如何进行语音业务呢,那就采用回落到2g/3g网络的cs域进行语音业务。
但是终端要支持CSFB必须有一下条件:
1.终端所在区域重叠覆盖4g网络和2g/3g网络
2.终端要同时支持4g网络和2g/3g网络

注:lte的MME通过SGs接口与2G/3G的MSC-S通信

二 lte注册log分析

本文使用高通的qxdmlog分析
分析qxdm log之前先说几个概念
1.联合附着类型
lte网络附着前面我已经说过了,这里解释下lte附着方式(EPS attach type),相关内容在attach request中
分为下面几种方式:

类型(取值) 含义
EPS Attach(001) 普通附着
combined EPS/IMSI attach(010) 联合附着
EPS Emergency attach(110) 紧急附着
保留位(111) 保留

2.UE’s Usage Setting
次参数关系到联合附着失败后,采用何种方式来支持语音业务。

类型(取值) 说明
voice centric(0) 语音业务为主,联合附着失败,转到2G/3G网络重新发起附着
data centric(1) 数据业务为主,联合附着失败,只能支持volte语音

3.voice domain preference
用于配置优先选择哪个语音域

类型(取值) 说明
CS voice Only(00) 仅支持CSFB
IMS PS Voice only(01) 仅支持volte
CS Voice Preferred,IMS PS Voice as Secondary(10) 优先支持CSFB,其次volte
IMS PS Voice preferred, CS Voice as secondary(11) 优先支持volte,其次CSFB

下面重点说下上述内容在qxdm log中的说明
attach request

07:42:25.220	[0xB0ED]	LTE NAS EMM Plain OTA Outgoing Message
pkt_version = 1 (0x1)
rel_number = 9 (0x9)
rel_version_major = 5 (0x5)
rel_version_minor = 0 (0x0)
security_header_or_skip_ind = 0 (0x0)
prot_disc = 7 (0x7) (EPS mobility management messages)
msg_type = 65 (0x41) (Attach request)
lte_emm_msg
  emm_attach_request
    tsc = 0 (0x0) (cached sec context)
    nas_key_set_id = 3 (0x3)
    att_type = 2 (0x2) (combined EPS/IMSI attach)    //联合附着方式 
    eps_mob_id    //终端用户标识
      id_type = 6 (0x6) (GUTI)
      odd_even_ind = 0 (0x0)
      Guti_1111 = 15 (0xf)
      mcc_1 = 4 (0x4)
      mcc_2 = 6 (0x6)
      mcc_3 = 0 (0x0)
      mnc_3 = 15 (0xf)
      mnc_1 = 0 (0x0)
      mnc_2 = 0 (0x0)
      MME_group_id = 610 (0x262)
      MME_code = 242 (0xf2)
      m_tmsi = 3733388296 (0xde86fc08)
    ue_netwk_cap    //终端安全能力
      EEA0 = 1 (0x1)
      EEA1_128 = 1 (0x1)
      EEA2_128 = 1 (0x1)
      EEA3_128 = 1 (0x1)
      EEA4 = 0 (0x0)
      EEA5 = 0 (0x0)
      EEA6 = 0 (0x0)
      EEA7 = 0 (0x0)
      EIA0 = 0 (0x0)
      EIA1_128 = 1 (0x1)
      EIA2_128 = 1 (0x1)
      EIA3_128 = 1 (0x1)
      EIA4 = 0 (0x0)
      EIA5 = 0 (0x0)
      EIA6 = 0 (0x0)
      EIA7 = 0 (0x0)
      oct5_incl = 1 (0x1)
      UEA0 = 0 (0x0)
      UEA1 = 0 (0x0)
      UEA2 = 0 (0x0)
      UEA3 = 0 (0x0)
      UEA4 = 0 (0x0)
      UEA5 = 0 (0x0)
      UEA6 = 0 (0x0)
      UEA7 = 0 (0x0)
      oct6_incl = 1 (0x1)
      UCS2 = 0 (0x0)
      UIA1 = 0 (0x0)
      UIA2 = 0 (0x0)
      UIA3 = 0 (0x0)
      UIA4 = 0 (0x0)
      UIA5 = 0 (0x0)
      UIA6 = 0 (0x0)
      UIA7 = 0 (0x0)
      oct7_incl = 1 (0x1)
      ProSedd = 0 (0x0)
      ProSe = 0 (0x0)
      H_245_ASH = 0 (0x0)
      ACC_CSFB = 1 (0x1)
      LPP = 0 (0x0)
      LCS = 0 (0x0)
      vcc_1xsr = 0 (0x0)
      NF = 1 (0x1)
      oct8_incl = 0 (0x0)
      oct9_incl = 0 (0x0)
      oct10_incl = 0 (0x0)
      oct11_incl = 0 (0x0)
      oct12_incl = 0 (0x0)
      oct13_incl = 0 (0x0)
      oct14_incl = 0 (0x0)
      oct15_incl = 0 (0x0)
    esm_msg_container
      eps_bearer_id_or_skip_id = 0 (0x0)
      prot_disc = 2 (0x2) (EPS session management messages)
      trans_id = 5 (0x5)
      msg_type = 208 (0xd0) (PDN connectivity request)  //pdn connectivity request
      lte_esm_msg  //lte网络
        pdn_connectivity_req  //PDN 连接请求消息
          pdn_type = 3 (0x3) (Ipv4v6)
          req_type = 1 (0x1) (initial request)
          info_trans_flag_incl = 0 (0x0)
          access_pt_name_incl = 0 (0x0)
          prot_config_incl = 1 (0x1)
          prot_config
            ext = 1 (0x1)
            conf_prot = 0 (0x0)
            num_recs = 5 (0x5)
            sm_prot[0]
              protocol_id = 32801 (0x8021) (IPCP)
              prot_len = 16 (0x10)
              ipcp_prot
                ipcp_prot_id = 1 (0x1) (CONF_REQ)
                identifier = 0 (0x0)
                rfc1332_conf_req
                  num_options = 2 (0x2)
                  conf_options[0]
                    type = 129 (0x81)
                    rfc1877_primary_dns_server_add
                      length = 6 (0x6)
                      ip_addr = 0 (0x0) (0.0.0.0)
                  conf_options[1]
                    type = 131 (0x83)
                    rfc1877_sec_dns_server_add
                      length = 6 (0x6)
                      ip_addr = 0 (0x0) (0.0.0.0)
            sm_prot[1]
              protocol_id = 13 (0xd) (DNS Server IPv4 Address Requestt)
              prot_len = 0 (0x0)
            sm_prot[2]
              protocol_id = 3 (0x3) (DNS Server IPv6 Addr Req)
              prot_len = 0 (0x0)
            sm_prot[3]
              protocol_id = 10 (0xa) (IP address allocation via NAS signalling)
              prot_len = 0 (0x0)
            sm_prot[4]
              protocol_id = 5 (0x5) (NWK Req Bearer Control indicator)
              prot_len = 0 (0x0)
            num_recs2 = 1 (0x1)
            sm_container[0]
              container_id = 16 (0x10) (Ipv4 Link MTU Request)
              container_len = 0 (0x0)
          dev_properties_incl = 0 (0x0)
          nbifom_incl = 0 (0x0)
          header_compression_config_inclu = 0 (0x0)
          ext_prot_config_incl = 0 (0x0)
    p_tmsi_sig_incl = 0 (0x0)
    add_guti_incl = 0 (0x0)
    reg_tai_incl = 1 (0x1)
    tracking_area_id    //TAI 
      mcc_mnc
        mcc_1 = 4 (0x4)
        mcc_2 = 6 (0x6)
        mcc_3 = 0 (0x0)
        mnc_3 = 15 (0xf)
        mnc_1 = 0 (0x0)
        mnc_2 = 0 (0x0)
      tracking_area_id = 6150 (0x1806)
    drx_params_incl = 1 (0x1)
    drx_params
      split_pg_cycle_code = 10 (0xa)
      cycle_len_coeff = 0 (0x0)
      split_on_ccch = 0 (0x0)
      non_drx_timer = 0 (0x0)
    ms_netwk_cap_incl = 1 (0x1)
    ms_netwk_cap           //GSM 终端能力
      length = 3 (0x3)
      r99 = 1 (0x1)
      GEA1 bits
        GEA/1 = 1 (0x1)
      SM capabilities via dedicated channels = 1 (0x1)
      SM capabilities via GPRS channels = 1 (0x1)
      UCS2 support = 0 (0x0)
      SS Screening Indicator = 1 (0x1)
      SoLSA Capability = 0 (0x0)
      Revision level indicator = 1 (0x1)
      PFC feature mode = 1 (0x1)
      Extended GEA bits
        GEA/2 = 1 (0x1)
        GEA/3 = 1 (0x1)
        GEA/4 = 0 (0x0)
        GEA/5 = 0 (0x0)
        GEA/6 = 0 (0x0)
        GEA/7 = 0 (0x0)
      LCS VA capability = 0 (0x0)
      PS inter-RAT HO from GERAN to UTRAN Iu mode capability = 0 (0x0)
      PS inter-RAT HO from GERAN to E-UTRAN S1 mode capability = 0 (0x0)
      EMM Combined procedures Capability = 1 (0x1)
      ISR support = 1 (0x1)
      SRVCC to GERAN/UTRAN capability = 1 (0x1)
      EPC capability = 1 (0x1)
      NF capability = 1 (0x1)
      spare_bits0_count = 0 (0x0)
    old_loc_area_id_incl = 1 (0x1)
    old_loc_area_id
      mcc_1 = 4 (0x4)
      mcc_2 = 6 (0x6)
      mcc_3 = 0 (0x0)
      mnc_3 = 15 (0xf)
      mnc_1 = 0 (0x0)
      mnc_2 = 0 (0x0)
      loc_area_code = 6150 (0x1806)
    tmsi_stat_incl = 0 (0x0)
    ms_class_mark2_incl = 1 (0x1)
    ms_class_mark2
      rev_level = 2 (0x2)
      es_ind = 1 (0x1)
      a5_1_alg_sup = 0 (0x0)
      rf_power_cap = 7 (0x7)
      pseudo_sync_cap = 1 (0x1)
      ss_screen_ind = 1 (0x1)
      sm_cap = 1 (0x1)
      vbs = 0 (0x0)
      vgcs = 0 (0x0)
      freq_cap = 0 (0x0)
      class_3_avail = 1 (0x1)
      lcsva_cap = 1 (0x1)
      ucs2 = 0 (0x0)
      solsa = 0 (0x0)
      cmsp = 1 (0x1)
      a5_3_alg_sup = 1 (0x1)
      a5_2_alg_sup = 0 (0x0)
    ms_class_mark3_incl = 1 (0x1)
    ms_class_mark3
      spare_bit0 = 0 (0x0)
      const_110 = 6 (0x6)
      A5 bits struct
        A5/7 = 0 (0x0)
        A5/6 = 0 (0x0)
        A5/5 = 0 (0x0)
        A5/4 = 0 (0x0)
      Associated Radio Capability 2 = 1 (0x1)
      Associated Radio Capability 1 = 4 (0x4)
      r_support_present = 0 (0x0)
      hscsd_multi_slot_capability_present = 0 (0x0)
      UCS2 treatment = 0 (0x0)
      Extended Measurement Capability = 0 (0x0)
      ms_measurement_capability_present = 0 (0x0)
      ms_positioning_method_capability_present = 1 (0x1)
      MS Positioning Method Capability
        MS Positioning Method = 1 (0x1)
      ecsd_multi_slot_capability_present = 0 (0x0)
      gsm_8_psk_struct_present = 0 (0x0)
      gsm_400_bands_supported_present = 0 (0x0)
      gsm_850_associated_radio_capability_present = 1 (0x1)
      GSM 850 Associated Radio Capability = 4 (0x4)
      gsm_1900_associated_radio_capability_present = 1 (0x1)
      GSM 1900 Associated Radio Capability = 1 (0x1)
      UMTS FDD Radio Access Technology Capability = 0 (0x0)
      UMTS 3.84 Mcps TDD Radio Access Technology Capability = 0 (0x0)
      CDMA 2000 Radio Access Technology Capability = 0 (0x0)
      dtm_gprs_multi_slot_class_present = 0 (0x0)
      single_band_support_present = 0 (0x0)
      gsm_750_associated_radio_capability_present = 0 (0x0)
      UMTS 1.28 Mcps TDD Radio Access Technology Capability = 0 (0x0)
      GERAN Feature Package 1 = 1 (0x1)
      extended_dtm_gprs_multi_slot_class_present = 0 (0x0)
      high_multislot_capability_present = 0 (0x0)
      geran_iu_mode_capabilities_present = 0 (0x0)
      GERAN Feature Package 2 = 0 (0x0)
      GMSK Multislot Power Profile = 0 (0x0)
      gsm 8-PSK Multislot Power Profile = 3 (0x3)
      t_gsm_400_bands_supported_present = 0 (0x0)
      t_gsm_900_associated_radio_capability_present = 0 (0x0)
      Downlink Advanced Receiver Performance = 1 (0x1)
      DTM Enhancements Capability = 0 (0x0)
      dtm_gprs_high_multi_slot_class_present = 0 (0x0)
      Repeated ACCH Capability = 1 (0x1)
      gsm_710_associated_radio_capability_present = 0 (0x0)
      t_gsm_810_associated_radio_capability_present = 0 (0x0)
      Ciphering Mode Setting Capability = 0 (0x0)
      Additional Positioning Capabilities = 0 (0x0)
      E-UTRA FDD support = 1 (0x1)
      E-UTRA TDD support = 1 (0x1)
      E-UTRA Measurement and Reporting support = 1 (0x1)
      Priority-based reselection support = 1 (0x1)
      UTRA CSG Cells Reporting = 0 (0x0)
      VAMOS Level = 1 (0x1)
      spare_bits0_count = 1 (0x1)
      spare_bits0 = 0 (0x0)
    supp_codecs_incl = 1 (0x1)
    supp_codecs
      num_codecs = 2 (0x2)
      codecs[0]
        sysid = 4 (0x4)
        length = 2 (0x2)
        bitmap[0] = 96 (0x60)
        bitmap[1] = 4 (0x4)
      codecs[1]
        sysid = 0 (0x0)
        length = 2 (0x2)
        bitmap[0] = 31 (0x1f)
        bitmap[1] = 2 (0x2)
    add_update_type_incl = 0 (0x0)
    voice_domain_pref_incl = 1 (0x1)
    voice_domain_pref    //语音域的特性
      length = 1 (0x1)
      UE_usage_setting = 1 (0x1) (Data centric)     //数据优先
      voice_domain_pref_for_EUTRAN = 3 (0x3) (IMS PS Voice preferred, CS Voice as secondary)   //语音优先volte,CSFB次之
    dev_properties_incl = 0 (0x0)
    old_guti_incl = 1 (0x1)
    old_guti
      guti_type = 0 (0x0) (Native GUTI)     //guti 类型
    ms_network_feature_incl = 1 (0x1)
    ms_network_feature_support
      ext_periodic_timers = 1 (0x1)
    network_resource_id_container_incl = 0 (0x0)
    t3324_incl = 0 (0x0)
    t3412_ext_incl = 0 (0x0)
    ext_drx_par_incl = 0 (0x0)
    ue_add_security_cap_incl = 0 (0x0)
    ue_status_incl = 0 (0x0)

我们从上面attach request中可以得到有关语音相关信息如下
注册lte 网络plmn为 460 00,采用联合附着方式,优先数据业务,关于语音特性,优先volte语音,CSFB次之。

Attach Accept 消息

07:42:25.490	[0xB0EC]	LTE NAS EMM Plain OTA Incoming Message
pkt_version = 1 (0x1)
rel_number = 9 (0x9)
rel_version_major = 5 (0x5)
rel_version_minor = 0 (0x0)
security_header_or_skip_ind = 0 (0x0)
prot_disc = 7 (0x7) (EPS mobility management messages)
msg_type = 66 (0x42) (Attach accept)
lte_emm_msg
  emm_attach_accept
    attach_result = 2 (0x2) (comb EPS/IMSI attach)   //附着结果
    t3412   //GPRS timer,控制周期性位置更新定时器
      unit = 2 (0x2)
      timer_value = 9 (0x9)
    tai_list        //TAI list
      num_tai_list = 1 (0x1)
      tai_list[0]
        list_type = 0 (0x0)
        num_element = 0 (0x0)
        mcc_mnc
          mcc_1 = 4 (0x4)
          mcc_2 = 6 (0x6)
          mcc_3 = 0 (0x0)
          mnc_3 = 15 (0xf)
          mnc_1 = 0 (0x0)
          mnc_2 = 0 (0x0)
        tac[0] = 6150 (0x1806)
    esm_msg_container
      eps_bearer_id_or_skip_id = 5 (0x5)
      prot_disc = 2 (0x2) (EPS session management messages)
      trans_id = 5 (0x5)
      msg_type = 193 (0xc1) (Activate default EPS bearer context request)  //atcivate default eps bearer context 请求
      lte_esm_msg
        act_def_eps_bearer_context_req
          eps_qos
            qci = 9 (0x9) (QC9)
            oct4_incl = 0 (0x0)
            oct5_incl = 0 (0x0)
            oct6_incl = 0 (0x0)
            oct7_incl = 0 (0x0)
            oct8_incl = 0 (0x0)
            oct9_incl = 0 (0x0)
            oct10_incl = 0 (0x0)
            oct11_incl = 0 (0x0)
            oct12_incl = 0 (0x0)
            oct13_incl = 0 (0x0)
            oct14_incl = 0 (0x0)
            oct15_incl = 0 (0x0)
          access_point        // APN信息   CMNET 
            num_acc_pt_val = 25 (0x19)
            acc_pt_name_val[0] = 5 (0x5) (length)
            acc_pt_name_val[1] = 99 (0x63) (c)
            acc_pt_name_val[2] = 109 (0x6d) (m)
            acc_pt_name_val[3] = 110 (0x6e) (n)
            acc_pt_name_val[4] = 101 (0x65) (e)
            acc_pt_name_val[5] = 116 (0x74) (t)
            acc_pt_name_val[6] = 6 (0x6) (length)
            acc_pt_name_val[7] = 109 (0x6d) (m)
            acc_pt_name_val[8] = 110 (0x6e) (n)
            acc_pt_name_val[9] = 99 (0x63) (c)
            acc_pt_name_val[10] = 48 (0x30) (0)
            acc_pt_name_val[11] = 48 (0x30) (0)
            acc_pt_name_val[12] = 50 (0x32) (2)
            acc_pt_name_val[13] = 6 (0x6) (length)
            acc_pt_name_val[14] = 109 (0x6d) (m)
            acc_pt_name_val[15] = 99 (0x63) (c)
            acc_pt_name_val[16] = 99 (0x63) (c)
            acc_pt_name_val[17] = 52 (0x34) (4)
            acc_pt_name_val[18] = 54 (0x36) (6)
            acc_pt_name_val[19] = 48 (0x30) (0)
            acc_pt_name_val[20] = 4 (0x4) (length)
            acc_pt_name_val[21] = 103 (0x67) (g)
            acc_pt_name_val[22] = 112 (0x70) (p)
            acc_pt_name_val[23] = 114 (0x72) (r)
            acc_pt_name_val[24] = 115 (0x73) (s)
          pdn_addr   //分配的pdn地址
            pdn_addr_len = 13 (0xd)
            pdn_type = 3 (0x3) (IPv4v6)
            ipv6_interface_id = 0x83d26b12ad5af20d (83d2:6b12:ad5a:f20d)
            ipv4_addr = 180244164 (0xabe4ec4) (10.190.78.196)
          trans_id_incl = 1 (0x1)
          trans_id
            length = 1 (0x1)
            ti_flag = 0 (0x0)
            ti_value = 0 (0x0)
          qos_incl = 1 (0x1)
          qos
            delay_class = 4 (0x4) (Delay class 4 (best effort))
            reliability_class = 3 (0x3) (Unacknowledged GTP and LLC; Acknowledged RLC, Protected data)
            peak_throughput = 9 (0x9) (Up to 256 000 octet/s)
            precedence_class = 3 (0x3) (Low priority)
            mean_throughput = 31 (0x1f) (Best effort)
            traffic_class = 4 (0x4) (Background class)
            delivery_order = 2 (0x2) (Without delivery order ('no'))
            delivery_err_sdu = 3 (0x3) (Erroneous SDUs are not delivered ('no'))
            max_sdu_size = 150 (0x96) (1500 octets)
            max_bitrate_uplink = 254 (0xfe) (8640 kbps)
            max_bitrate_downlink = 254 (0xfe) (8640 kbps)
            residual_ber = 7 (0x7) (1*10^(-5))
            sdu_error_ratio = 4 (0x4) (1*10^(-4))
            transfer_delay = 18 (0x12) (300 ms)
            traffic_hand_pri = 3 (0x3) (Priority level 3)
            guar_bitrate_uplink = 255 (0xff) (0kbps)
            guar_bitrate_downlink = 255 (0xff) (0kbps)
            signalling_ind = 0 (0x0) (Not optimised for signalling traffic)
            source_stat_desc = 0 (0x0) (spare)
            downlink_ext_incl = 1 (0x1)
            max_bitrate_downlink_ext = 250 (0xfa) (256 Mbps)
            guar_bitrate_downlink_ext = 0 (0x0) (Use value in oct 13)
            uplink_ext_incl = 1 (0x1)
            max_bitrate_uplink_ext = 133 (0x85) (75 Mbps)
            guar_bitrate_uplink_ext = 0 (0x0) (Use value in oct 12)
          llc_sapi_incl = 1 (0x1)
          llc_sapi
            llc_sapi_value = 11 (0xb)
          radio_priority_incl = 1 (0x1)
          radio_priority
            radio_pri_val = 4 (0x4)
          pkt_flow_id_incl = 1 (0x1)
          pkt_flow_id
            length = 1 (0x1)
            packet_flow_id = 8 (0x8)
          apn_ambr_incl = 1 (0x1)
          apn_ambr
            apn_ambr_dl = 254 (0xfe) (8640 kbps)
            apn_ambr_ul = 254 (0xfe) (8640 kbps)
            oct5_incl = 1 (0x1)
            apn_ambr_dl_ext = 102 (0x66) (44 Mbps)
            oct6_incl = 1 (0x1)
            apn_ambr_ul_ext = 133 (0x85) (75 Mbps)
            oct7_incl = 1 (0x1)
            apn_ambr_dl_ext2 = 1 (0x1) (308.640000 Mbps)
            oct8_incl = 1 (0x1)
            apn_ambr_ul_ext2 = 0 (0x0) (Use value in oct 4 and oct 6)
          esm_cause_incl = 0 (0x0)
          prot_config_incl = 1 (0x1)
          prot_config
            ext = 1 (0x1)
            conf_prot = 0 (0x0)
            num_recs = 1 (0x1)
            sm_prot[0]
              protocol_id = 32801 (0x8021) (IPCP)
              prot_len = 16 (0x10)
              ipcp_prot
                ipcp_prot_id = 3 (0x3) (CONF_NAK)
                identifier = 0 (0x0)
                rfc1332_conf_nak
                  num_options = 2 (0x2)
                  conf_options[0]
                    type = 129 (0x81)
                    rfc1877_primary_dns_server_add
                      length = 6 (0x6)
                      ip_addr = 3548934194 (0xd3887032) (211.136.112.50)
                  conf_options[1]
                    type = 131 (0x83)
                    rfc1877_sec_dns_server_add
                      length = 6 (0x6)
                      ip_addr = 3548943938 (0xd3889642) (211.136.150.66)
            num_recs2 = 6 (0x6)
            sm_container[0]
              container_id = 3 (0x3) (DNS Server IPv6 Address)
              container_len = 16 (0x10)
              address = 0x2409801e200000000000000000000001 (2409:801e:2000:0:0:0:0:1)
            sm_container[1]
              container_id = 3 (0x3) (DNS Server IPv6 Address)
              container_len = 16 (0x10)
              address = 0x2409801e200000000000000000000002 (2409:801e:2000:0:0:0:0:2)
            sm_container[2]
              container_id = 13 (0xd) (DNS Server IPv4 Address)
              container_len = 4 (0x4)
              container_contents[0] = 211 (0xd3)
              container_contents[1] = 136 (0x88)
              container_contents[2] = 112 (0x70)
              container_contents[3] = 50 (0x32)
            sm_container[3]
              container_id = 13 (0xd) (DNS Server IPv4 Address)
              container_len = 4 (0x4)
              container_contents[0] = 211 (0xd3)
              container_contents[1] = 136 (0x88)
              container_contents[2] = 150 (0x96)
              container_contents[3] = 66 (0x42)
            sm_container[4]
              container_id = 5 (0x5) (Selected Bearer Control Mode)
              container_len = 1 (0x1)
              container_contents[0] = 2 (0x2)
            sm_container[5]
              container_id = 16 (0x10) (Ipv4 Link MTU Request)
              container_len = 2 (0x2)
              container_contents[0] = 5 (0x5)
              container_contents[1] = 220 (0xdc)
          connectivity_type_incl = 0 (0x0)
          wlan_offload_acceptability_incl = 0 (0x0)
          nbifom_incl = 0 (0x0)
          header_compression_config_inclu = 0 (0x0)
          ctrl_plane_only_ind_incl = 0 (0x0)
          ext_prot_config_incl = 0 (0x0)
          serv_plmn_rate_ctrl_incl = 0 (0x0)
          ext_apn_ambr_incl = 0 (0x0)
          ext_eps_qos_incl = 0 (0x0)
    guti_incl = 1 (0x1)
    guti   //mme 分配的guti
      id_type = 6 (0x6) (GUTI)
      odd_even_ind = 0 (0x0)
      Guti_1111 = 15 (0xf)
      mcc_1 = 4 (0x4)
      mcc_2 = 6 (0x6)
      mcc_3 = 0 (0x0)
      mnc_3 = 15 (0xf)
      mnc_1 = 0 (0x0)
      mnc_2 = 0 (0x0)
      MME_group_id = 610 (0x262)
      MME_code = 242 (0xf2)
      m_tmsi = 3733388324 (0xde86fc24)   //MSC-S为终端分配的TMSI
    loc_id_incl = 1 (0x1)
    loc_area_id    //位置区标识LAI=mcc+mnc+lac
      mcc_1 = 4 (0x4)
      mcc_2 = 6 (0x6)
      mcc_3 = 0 (0x0)
      mnc_3 = 15 (0xf)
      mnc_1 = 0 (0x0)
      mnc_2 = 0 (0x0)
      loc_area_code = 6150 (0x1806)
    ms_id_incl = 0 (0x0)
    emm_cause_incl = 0 (0x0)
    T3402_incl = 0 (0x0)
    T3423_incl = 0 (0x0)
    equ_plmns_incl = 0 (0x0)
    emergnecy_num_list_incl = 0 (0x0)
    eps_netwk_feature_support_incl = 1 (0x1)
    eps_netwk_feature_support      //网络特性
      length = 1 (0x1)
      CPCIoT = 0 (0x0)
      ERwoPDN = 0 (0x0)
      ESRPS = 0 (0x0)
      CS_LCS = 0 (0x0) (No info about support of loc service via cs is available)
      EPC_LCS = 0 (0x0) (Location Services via EPC not supported)
      EMC_BS = 0 (0x0) (Emergency bearer services in S1 Mode not supported)
      IMSVoPS = 1 (0x1) (IMS Vo PS Session in S1 Mode supported)
    add_update_result_incl = 0 (0x0)
    t3412_ext_incl = 0 (0x0)
    t3324_incl = 0 (0x0)
    ext_drx_par_incl = 0 (0x0)
    dcn_id_incl = 0 (0x0)
    sms_srvc_status_incl = 0 (0x0)
    non_3gpp_access_emerg_num_policy_incl = 0 (0x0)
    t3448_incl = 0 (0x0)
    nwk_policy_incl = 0 (0x0)
    t3447_ext_incl = 0 (0x0)
    ext_emergency_number_incl = 0 (0x0)
    cipher_ket_data_incl = 0 (0x0)

从本文中只有了解,如何从log中分析出,我们的终端会使用那种语音业务即可。

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