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  • 1 # 徐鳳年遇見陳平安

    4G信令流程

    1.1 信令流程:

    LTE信令主要模組:

    Ø 隨機接入

    Ø 尋呼

    Ø RRC連線建立、重配、重建立、釋放

    Ø 測量

    1.1.1 隨機接入

    1.1.2 尋呼

    1.1.3 RRC連線建立、重配、重建立、釋放

    1.14 測量

    2.1 CSFB信令流程

    NAS RRC MAC PDCP RLC

    NAS RRC MAC PDCP RLC

    UE

    1.Rrc Connection Request→

    eNB

    MME

    Msg1→

    RAR←

    Msg3→

    Msg4←

    2.Rrc Connection Setup←

    3.Rrc Connection Complete→

    4.S1AP_InitialUEMessageMsg(Attach Request)→ a) TAI;

    b) E-UTRAN CGI;

    c) NAS-PDU:Attach Request訊息;

    d) RRC Establishment Cause;

    6.DownLinkTransportMsg(Authentication Request)←

    5.S1AP_DownLinkNasTransportMsg(Authentication Request)←

    7.UpLinkTransportMsg(Authentication Response)→

    8.S1AP_UpLinkNasTransportMsg(Authentication Response)→

    10.DownLinkTransportMsg(Nas_SecurityCommand)←

    9.S1AP_DownLinkNasTransportMsg(Nas Security Command)←

    11.UpLinkTranportMsg(Nas_SecurityComplete)→

    12.S1AP_UpLinkNasTransportMsg(Nas Security Complete)→

    . cfrd

    13.S1AP_InitialContextSetupRequestMsg(Attach Accept)←

    a) MME UE S1AP ID;

    b) eNB UE S1AP ID;

    c) UE Aggregate Maximum Bit Rate;

    d) E-RAB to be Setup List:

    i) E-RAB ID;

    ii) E-RAB Level QoS Parameters,中包含QCI為5~9(預設E-RAB);

    iii) Transport Layer Address;

    iv) GTP-TEID;

    v) NAS-PDU;

    e) UE security capabilities;

    f) Security Key;

    g) Trace Activation(Optional);

    h) Handover Restriction List(Optional);

    i) UE Radio Capability(Optional);

    j) Subscriber Profile ID for RAT/Frequency priority(Optional);

    k) CS Fallback Indicator(Optional);

    l) SRVCC Operation Possible(Optional)

    15.UECapabilityInformation→

    16.S1AP_UECapabilityInformationMsg→

    17.RRC_SecurityModeCommand←

    18.RrcConnectionReconfiguration←

    19.RRC_SecurityModeComplete→

    20.RrcConnectionReconfigurationComplete→

    21.S1AP_InitialContextSetupReponseMsg→

    a) 成功建立的E-RAB的RAB ID和傳輸層地址;

    22.Attach Accept←

    23.Attach Complete→

    24.S1AP_UpLinkNasTransportMsg→

    25.UlInfomationTransport(Detach Request)→

    26.S1AP_UpLinkNasTransportMsg→

    a) eNB UE S1AP ID;

    b) TAI;

    c) E-UTRAN CGI;

    d) NAS-PDU:Detach Request訊息;

    e) RRC Establishment Cause;

    28.DlInformationTransport(Detach Accept)←

    27.S1AP_DownLinkNasTransportMsg(Detach Accept)←

    30.RrcConnectionRelease←

    29.S1AP_UeContextReleaseCommandMsg←

    31.S1AP_UeContextReleaseCompleteMsg→

    信令

    翻譯

    Attach request

    附著請求

    rrcConnectionRequest

    RRC連線請求

    rrcConnectionSetup

    RRC連線建立

    rrcConnectionSetupComplete

    RRC連線設定完成

    rrcConnectionReconfiguration

    rrc連線重配置

    dl Information Transfer

    DL資訊傳輸

    rrc Connection Reconfiguration Complete

    rrc連線重配置完成

    Security protected NAS message

    安全保護的NAS訊息

    Authentication request

    認證請求

    Authentication response

    驗證響應

    Unknown(0x077B)

    未知(0x077B)

    ulInformationTransfer

    UL資訊傳輸

    dlInformationTransfer

    DL資訊傳輸

    Security protected NAS message

    安全保護的NAS訊息

    Security mode command

    安全模式命令

    Security mode complete

    安全模式完成

    Unknown(0x0790)

    未知(0x0790)

    ulInformationTransfer

    UL資訊傳輸

    ueCapabilityEnquiry

    UE能力查詢

    ueCapabilityInformation

    UE能力資訊

    securityModeCommand

    安全模式命令

    rrcConnectionReconfiguration

    RRC連線重配置

    rrcConnectionReconfigurationComplete

    rrc連線重配置完成

    Security protected NAS message

    安全保護的NAS訊息

    Attach accept

    附著接受

    Activate default EPS bearer context request

    啟用預設EPS承載上下文請求

    Activate default EPS bearer context accept

    啟用預設EPS承載上下文接受

    Attach complete

    附著完成

    Unknown(0x072D)

    未知(0x072D)

    ulInformationTransfer

    UL資訊傳輸

    rrcConnectionReconfiguration

    RRC連線重配置

    rrcConnectionReconfigurationComplete

    rrc連線重配置完成

    RrcConnectionRelease

    rrc釋放

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