29接入控制.docx

1、29接入控制接入控制（Unified access control）接入控制指的是UE在发起一个NAS层或者AS层的业务/信令请求之前，先要根据一定的机制和控制参数来确认网络是否允许，如果通过了接入控制检查，那么NAS层或者AS层才能够建立NAS、AS的信令和业务连接，否则需要等待一定的时间后才能够再次进行接入控制检查。目的是在网络比较繁忙的时候，在UE的类型和业务的类型这两个维度上来进行过滤操作，让优先级比较高的UE或者比较重要的业务能够顺利获得服务。UE在获准发起呼叫过程以后，会在信令上附加发起呼叫的原因。gNB在获取这个呼叫原因以后，还可以根据本身的实际需要来决定是否接纳这次呼叫，这让g

2、NB拥有了负载控制的功能。在发起一个业务的时候，需要携带“接入类别”、“接入标识”和“建立原因”三类信息。在下面事件需要进行接入控制核实： UE处于5GMM-IDLE模式，在3GPP接入上有暂停指示，并且发生需要转换到5GMM-CONNECTED模式的事件； UE在3GPP接入上处于5GMM连接模式或在RRC_INACTIVE指示下处于5GMM连接模式，并且发生以下事件之一：1） 5GMM接收来自上层的MO-IMS-registration-related-signalling-started指示、MO-MMTEL-voice-call-started指示、MO-MMTEL-video-cal

3、l-started指示或MO-SMSoIP-attempt-started指示；（也就是打电话）2） 5GMM接收来自上层的请求，以便通过NAS发送MO（mobile originated） SMS；也就是发送短信3） 5GMM从上层接收发送UL NAS TRANSPORT消息以建立PDU会话的请求；4） 5GMM接收来自上层的请求，以发送UL NAS TRANSPORT消息以用于PDU会话修改；5） 5GMM接收到为现有PDU会话重新建立用户平面资源的请求；6） 通知5GMM上行链路用户数据包将被发送到具有挂起的用户平面资源的PDU会话；7） 5GMM接收来自上层的发送MO的位置请求；（主动

4、网络丁伟）8） 5GMM接收来自上层的请求，通过发送包含UE策略容器的UL NAS TRANSPORT消息向PCF发送MO的信令事务。上面这些触发事件总结如下表：TriggerDescriptionNAS State Change5GMM-IDLE - 5GMM-CONNECTEDService Request (in 5GMM-CONNECTED)MO-MMTEL-voice-call-started indicationMO-MMTEL-video-call-started indicationMO-SMSoIP-attempt-startedMO SMS over NASUL NAS T

5、RANSPORT message for PDU session establishment (except for the purpose of IDLE - CONNECTED NAS State change)UL NAS TRANSPORT message for PDU session modification (except for the purpose of IDLE - CONNECTED NAS State change)Request to re-establish the user-plane resources for an existing PDU sessionN

6、otification for an uplink user data packet to be sent for a PDU session with suspended user-plane resources有一个业务不受接入控制的限制，那就是注册流程。有一个简写名称SNPN，全称是Stand-alone Non-Public Network接入标识和接入类别（不在SNPN模式下）当UE进行初始接入时（initiate an access attempt），需要关联一个或多个接入标识以及接入类别，接入标识主要是核实SIM卡的信息和PLMN是否能匹配，接入标识如下：Access Ident

7、ity numberUE configuration0UE is not configured with any parameters from this table1 (NOTE 1)UE is configured for multimedia priority service (MPS).2 (NOTE 2)UE is configured for mission critical service (MCS).3-10Reserved for future use11 (NOTE 3)Access Class 11 is configured in the UE.12 (NOTE 3)A

8、ccess Class 12 is configured in the UE.13 (NOTE 3)Access Class 13 is configured in the UE.14 (NOTE 3)Access Class 14 is configured in the UE.15 (NOTE 3)Access Class 15 is configured in the UE.注1：访问标识1在以下情况下有效：USIM文件EFUAC_AIC指示UE被配置为访问标识1和所选PLMN，如果选择了新PLMN，或者RPLMN是HPLMN（如果EHPLMN列表不存在或为空）或EHPLMN（如果EHP

9、LMN列表存在），或者是归属的已访问PLMNUE从RPLMN接收MPS指示符位设置为“访问标识1有效”的5GS网络特性支持IE。注2：接入标识2由为MCS配置的ue使用，并且在以下情况下有效：USIM文件EFUAC_AIC指示UE被配置为访问标识2和所选PLMN（如果选择了新PLMN），或者RPLMN是HPLMN（如果EHPLMN列表不存在或为空）或EHPLMN（如果EHPLMN列表存在），或者是归属的已访问PLMNUE接收来自RPLMN的5GS网络特性支持IE，MCS指示位设置为“Access identity 2 valid”注3：访问标识11和15在HPLMN（如果EHPLMN列表不存在

10、或为空）或EHPLMN（如果EHPLMN列表存在）中有效。访问标识12、13和14仅在归属的HPLMN和访问plmn中有效。接入等级映射表如下：Table4.5.2.2: Mapping table for access categoriesRule #Type of access attemptRequirements to be metAccess Category1通过非3GPP接入对寻呼或通知的响应；为传输LPP消息而启动的5GMM连接管理程序，无需进行5GC-MO-LR程序；尝试从非3GPP接入切换正在进行的MMTEL语音呼叫、MMTEL视频呼叫或SMSoIP访问尝试用于MT访问，或

11、从非3GPP访问切换正在进行的MMTEL语音呼叫、MMTEL视频呼叫或SMSoIP0 (= MT_acc)2EmergencyUE is attempting access for an emergency session (NOTE1, NOTE2)2 (= emergency)3Access attempt for operator-defined access categoryUE stores operator-defined access category definitions valid in the current PLMN, and access attempt is mat

12、ching criteria of an operator-defined access category definition32-63 (= based on operator classification)3.1Access attempt for MO exception dataUE is in NB-N1 mode and allowed to use exception data reporting (see the ExceptionDataReportingAllowed leaf of the NAS configuration MOor the USIM file EFN

13、ASCONFIG in 3GPPTS31.102, and access attempt is for MO data or for MO signalling initiated upon receiving a request from upper layers to transmit user data related to an exceptional event.10 (= MO exception data)4Access attempt for delay tolerant service(a) UE is configured for NAS signalling low pr

14、iority or UE supporting S1 mode is configured for EAB (see the ExtendedAccessBarring leaf of NAS configuration MO in 3GPPTS24.368 or 3GPPTS31.102 where EAB override does not apply, and(b): the UE received one of the categories a, b or c as part of the parameters for unified access control in the bro

15、adcast system information, and the UE is a member of the broadcasted category in the selected PLMN or RPLMN/equivalent PLMN (NOTE3, NOTE5, NOTE6, NOTE7, NOTE8)1 (= delay tolerant)4.1MO IMS registration related signallingAccess attempt is for MO IMS registration related signalling (e.g. IMS initial r

16、egistration, re-registration, subscription refresh)or for NAS signalling connection recovery during ongoing procedure for MO IMS registration related signalling (NOTE2a)9 (= MO IMS registration related signalling)5MO MMTel voice callAccess attempt is for MO MMTel voice call or for NAS signalling con

17、nection recovery during ongoing MO MMTel voice call (NOTE2)4 (= MO MMTel voice)6MO MMTel video callAccess attempt is for MO MMTel video call or for NAS signalling connection recovery during ongoing MO MMTel video call (NOTE2)5 (= MO MMTel video)7MO SMS over NAS or MO SMSoIPAccess attempt is for MO S

18、MS over NAS (NOTE4) or MO SMS over SMSoIP transferor for NAS signalling connection recovery during ongoing MO SMS or SMSoIP transfer (NOTE2)6 (= MO SMS and SMSoIP)8UE NAS initiated 5GMM specific proceduresAccess attempt is for MO signalling3 (= MO_sig)8.1Mobile originated location requestAccess atte

19、mpt is for mobile originated location request (NOTE9)3 (= MO_sig)8.2Mobile originated signalling transaction towards the PCFAccess attempt is for mobile originated signalling transaction towards the PCF (NOTE10)3 (= MO_sig)9UE NAS initiated 5GMM connection management procedure or 5GMM NAS transport

20、procedureAccess attempt is for MO data7 (= MO_data)10An uplink user data packet is to be sent for a PDU session with suspended user-plane resourcesNo further requirement is to be met7 (= MO_data)接入标识和接入类别（在SNPN模式下）Access identitiesAccess Identity numberUE configuration0UE is not configured with any

21、parameters from this table1 (NOTE 1)UE is configured for multimedia priority service (MPS).多媒体优先级服务2 (NOTE 2)UE is configured for mission critical service (MCS).关键任务服务3-10Reserved for future use11 (NOTE 3)Access Class 11 is configured in the UE.12 (NOTE 3)Access Class 12 is configured in the UE.13 (

22、NOTE 3)Access Class 13 is configured in the UE.14 (NOTE 3)Access Class 14 is configured in the UE.15 (NOTE 3)Access Class 15 is configured in the UE.接入等级对应哪些服务？下表Mapping table for access categoriesRule #Type of access attemptRequirements to be metAccess Category1Response to paging or NOTIFICATION ov

23、er non-3GPP access (NOTE11);5GMM connection management procedure initiated for the purpose of transporting an LPP message without an ongoing 5GC-MO-LR procedure;Access attempt to handover of MMTEL voice call, MMTEL video call or SMSoIP from non-3GPP accessAccess attempt is for MT access, or handover

24、 of ongoing MMTEL voice call, MMTEL video call or SMSoIP from non-3GPP access0 (= MT_acc)2EmergencyUE is attempting access for an emergency session (NOTE1, NOTE2)2 (= emergency)3Access attempt for operator-defined access categoryUE stores operator-defined access category definitions valid in the SNP

25、N as specified in subclause4.5.3, and access attempt is matching criteria of an operator-defined access category definition32-63 (= based on operator classification)4Access attempt for delay tolerant service(a) UE is configured for NAS signalling low priority or UE supporting S1 mode is configured f

26、or EAB (see the ExtendedAccessBarring leaf of NAS configuration MO in 3GPPTS24.36817 or 3GPPTS31.10222) where EAB override does not apply, and(b) the UE received one of the categories a, b or c as part of the parameters for unified access control in the broadcast system information, and the UE is a

27、member of the broadcasted category in the selected SNPN or RSNPN (NOTE3, NOTE5, NOTE6, NOTE7, NOTE8)1 (= delay tolerant)4.1MO IMS registration related signallingAccess attempt is for MO IMS registration related signalling (e.g. IMS initial registration, re-registration, subscription refresh)or for N

28、AS signalling connection recovery during ongoing procedure for MO IMS registration related signalling (NOTE2a)9 (= MO IMS registration related signalling)5MO MMTel voice callAccess attempt is for MO MMTel voice call or for NAS signalling connection recovery during ongoing MO MMTel voice call (NOTE2)

29、4 (= MO MMTel voice)6MO MMTel video callAccess attempt is for MO MMTel video call or for NAS signalling connection recovery during ongoing MO MMTel video call (NOTE2)5 (= MO MMTel video)7MO SMS over NAS or MO SMSoIPAccess attempt is for MO SMS over NAS (NOTE4) or MO SMS over SMSoIP transferor for NA

30、S signalling connection recovery during ongoing MO SMS or SMSoIP transfer (NOTE2)6 (= MO SMS and SMSoIP)8UE NAS initiated 5GMM specific proceduresAccess attempt is for MO signalling3 (= MO_sig)8.1Mobile originated location requestAccess attempt is for mobile originated location request (NOTE9)3 (= M

31、O_sig)8.2Mobile originated signalling transaction towards the PCFAccess attempt is for mobile originated signalling transaction towards the PCF (NOTE10)3 (= MO_sig)9UE NAS initiated 5GMM connection management procedure or 5GMM NAS transport procedureAccess attempt is for MO data7 (= MO_data)10An uplink user data packet is to be sent for a PDU session with suspended user-plane resourcesNo further requirement is to be met7 (= MO_data)