4g切换信令流程
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发布时间:2024-09-28 05:36
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时间:2024-09-29 11:40
4G信令流程
1.1 信令流程:
LTE信令主要模块:
?随机接入
?寻呼
?RRC连接建立、重配、重建立、释放
?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
?
NASRRCMACPDCPRLC
?
NASRRCMACPDCPRLC
?
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