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【5G NR】UE注册拒绝原因
2022-07-25 08:03:00 【柒号华仔】
1. Registration Reject数据结构
UE发起初始注册请求,若被AMF拒绝,AMF会发送Registration Reject消息给UE,该消息会包含拒绝的原因值。
REGISTRATION REJECT 消息结构
IEI | Information Element | Type/Reference | Presence | Format | Length |
Extended protocol discriminator | Extended protocol discriminator 9.2 | M | V | 1 | |
Security header type | Security header type 9.3 | M | V | 1/2 | |
Spare half octet | Spare half octet 9.5 | M | V | 1/2 | |
Registration reject message identity | Message type 9.7 | M | V | 1 | |
5GMM cause | 5GMM cause 9.11.3.2 | M | V | 1 | |
5F | T3346 value | GPRS timer 2 9.11.2.4 | O | TLV | 3 |
16 | T3502 value | GPRS timer 2 9.11.2.4 | O | TLV | 3 |
78 | EAP message | EAP message 9.11.2.2 | O | TLV-E | 7-1503 |
2. 拒绝原因清单
5GMM原因目的是指示来自UE的5GMM请求被网络拒绝的原因,拒绝原因的编码如下图所示。
5GMM原因是具有2个八位字节长度。
5GMM cause information element
8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
5GMM cause IEI | octet 1 | |||||||
Cause value | octet 2 | |||||||
5GMM cause information element
Cause value (octet 2) | |||||||||
Bits | |||||||||
8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | ||
0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | Illegal UE | |
0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | PEI not accepted | |
0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | Illegal ME | |
0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 5GS services not allowed | |
0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 | UE identity cannot be derived by the network | |
0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | Implicitly de-registered | |
0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | PLMN not allowed | |
0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | Tracking area not allowed | |
0 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | Roaming not allowed in this tracking area | |
0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | No suitable cells in tracking area | |
0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | MAC failure | |
0 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | Synch failure | |
0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | Congestion | |
0 | 0 | 0 | 1 | 0 | 1 | 1 | 1 | UE security capabilities mismatch | |
0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | Security mode rejected, unspecified | |
0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | Non-5G authentication unacceptable | |
0 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | N1 mode not allowed | |
0 | 0 | 0 | 1 | 1 | 1 | 0 | 0 | Restricted service area | |
0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | Redirection to EPC required | |
0 | 0 | 1 | 0 | 1 | 0 | 1 | 1 | LADN not available | |
0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | Maximum number of PDU sessions reached | |
0 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | Insufficient resources for specific slice and DNN | |
0 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | Insufficient resources for specific slice | |
0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | ngKSI already in use | |
0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | Non-3GPP access to 5GCN not allowed | |
0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | Serving network not authorized | |
0 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | Temporarily not authorized for this SNPN | |
0 | 1 | 0 | 0 | 1 | 0 | 1 | 1 | Permanently not authorized for this SNPN | |
0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | Payload was not forwarded | |
0 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | DNN not supported or not subscribed in the slice | |
0 | 1 | 0 | 1 | 1 | 1 | 0 | 0 | Insufficient user-plane resources for the PDU session | |
0 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | Semantically incorrect message | |
0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | Invalid mandatory information | |
0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | Message type non-existent or not implemented | |
0 | 1 | 1 | 0 | 0 | 0 | 1 | 0 | Message type not compatible with the protocol state | |
0 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | Information element non-existent or not implemented | |
0 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | Conditional IE error | |
0 | 1 | 1 | 0 | 0 | 1 | 0 | 1 | Message not compatible with the protocol state | |
0 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | Protocol error, unspecified | |
Any other value received by the mobile station shall be treated as 0110 1111, "protocol error, unspecified". Any other value received by the network shall be treated as 0110 1111, "protocol error, unspecified". | |||||||||
3. 原因操作描述
3.1 Cause3 or 6(用户非法)
UE将5GS更新状态设置为5U3 ROAMING NOT ALLOWED,并删除5G-GUTI、上次访问的注册TAI、TAI List和ngKSI。
3.2 Cause 7(5G服务不支持)
UE将5GS更新状态设置为5U3 ROAMING NOT ALLOWED,并删除5G-GUTI、上次访问的注册TAI、TAI List和ngKSI。
在PLMN的情况下,UE应该USIM视为对5GS服务无效,直到关闭或移除包含USIM的UICC;
UE进入5G去注册状态。
3.3 Cause 11(PLMN不支持)
UE将5GS更新状态设置为5U3 ROAMING NOT ALLOWED,并删除任何5G-GUTI、上次访问的注册TAI、TAI List和ngKSI。UE应删除对应的PLMN列表,重置注册尝试计数器,并将该PLMN标识存储在PLMN禁止列表中。UE应进入5G去注册状态。重新进行PLMN搜索和PLMN选择。如果NAS成功地检查了消息的完整性,UE应将PLMN特定的尝试计数器和针对该PLMN的非3GPP访问的PLMN特定尝试计数器设置为UE实现特定的最大值。
3.4 Cause 12(TAC不允许)
UE将5GS更新状态设置为5U3 ROAMING NOT ALLOWED,并删除任何5G-GUTI、上次访问的注册TAI、TAI List和ngKSI。UE应将当前TAI存储在当前SNPN的“5GSforbidden tracking areas for regional provision of service”列表中,并进入5G去注册和服务限制状态。
3.5 Cause 13(禁止漫游)
UE将5GS更新状态设置为5U3 ROAMING NOT ALLOWED,并删除任何5G-GUTI、上次访问的注册TAI、TAI List和ngKSI。将TAI加入“5G禁用"表,并进入5G去注册和服务限制状态。
3.5 Cause 15(TAC无可用小区)
将当前TAI存入5G禁止漫入表,进入5G去注册和业务限制状态,UE根据小区选择准则搜索一个合适的小区进行驻留。
3.6 Cause 22(拥塞)
如果拒绝消息中有T3346,并且该值指示该计时器既不是零也不是去激活,则UE应按如下所述进行;否则,应将其视为异常情况。
UE应中止初始注册过程,将5GS更新状态设置为5U2 NOT UPDATED,尝试重新继续注册。
停止定时器T3346,在服务小区中申请正常小区重选进程。
3.7Cause 27(N1模式不允许)
UE将5GS更新状态设置为5U3 ROAMING NOT ALLOWED,删除5G-GUTI、上次访问的注册TAI、TAI List和ngKSI。重置注册计数器,UE进入5GMM-DEREGISTERED和LIMITED-SERVICE状态。关闭N1模式下的3GPP和non-3GPP接入。
3.8Cause72 (Non-3GPP不允许进行5GCN)
当通过非3GPP访问接收时,UE应将5GS更新状态设置为5U3 ROAMING NOT ALLOWED,并删除5G-GUTI、上次访问的注册TAI、TAI List和ngKSI。此外,UE应重置登记尝试计数器并进入5GMM-DEREGISTERED状态。如果NAS成功地检查了消息的完整性,则UE应将该PLMN的非3GPP访问的PLMN特定N1模式尝试计数器设置为UE实现特定的最大值。
3.9 Cause73(业务未授权)
重置注册计数器,置PLMN于“PLMN黑名单”,进入5GMM未注册状态,进行PLMN搜索。
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