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4g切换信令流程

4g切换信令流程

更新时间:2023-06-28 18:56:37

4g切换信令流程

4G信令流程

1.1 信令流程:

LTE信令主要模块:

Ø 随机接入

Ø 寻呼

Ø RRC连接建立、重配、重建立、释放

Ø 测量

1.1.1 随机接入

1.1.2 寻呼

1.1.3 RRC连接建立、重配、重建立、释放

1.14 测量

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消息;

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为5~9(缺省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和传输层地址;

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消息;

e) RRC Establishment Cause;

28.DlInformationTransport(Detach Accept)←

27.S1AP_DownLinkNasTransportMsg(Detach Accept)←

30.RrcConnectionRelease←

29.S1AP_UeContextReleaseCommandMsg←

31.S1AP_UeContextReleaseCompleteMsg→

信令

翻译

Attach request

附着请求

rrcConnectionRequest

RRC连接请求

rrcConnectionSetup

RRC连接建立

rrcConnectionSetupComplete

RRC连接设置完成

rrcConnectionReconfiguration

rrc连接重配置

dl Information Transfer

DL信息传输

rrc Connection Reconfiguration Complete

rrc连接重配置完成

Security protected NAS message

安全保护的NAS消息

Authentication request

认证请求

Authentication response

验证响应

Unknown(0x077B)

未知(0x077B)

ulInformationTransfer

UL信息传输

dlInformationTransfer

DL信息传输

Security protected NAS message

安全保护的NAS消息

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信息传输

ueCapabilityEnquiry

UE能力查询

ueCapabilityInformation

UE能力信息

securityModeCommand

安全模式命令

rrcConnectionReconfiguration

RRC连接重配置

rrcConnectionReconfigurationComplete

rrc连接重配置完成

Security protected NAS message

安全保护的NAS消息

Attach accept

附着接受

Activate default EPS bearer context request

激活默认EPS承载上下文请求

Activate default EPS bearer context accept

激活默认EPS承载上下文接受

Attach complete

附着完成

Unknown(0x072D)

未知(0x072D)

ulInformationTransfer

UL信息传输

rrcConnectionReconfiguration

RRC连接重配置

rrcConnectionReconfigurationComplete

rrc连接重配置完成

RrcConnectionRelease

rrc释放

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