51学通信技术论坛

 找回密码
 立即注册
搜索
查看: 11111|回复: 0
打印 上一主题 下一主题

[原创] combined attach的相关问题 [复制链接]

Rank: 2Rank: 2

楼主
发表于 2013-9-5 01:19:52 |显示全部楼层
#18        (CS domain not available)
        The UE shall stop timer T3410 if still running, shall reset the tracking area updating attempt counter, shall set the EPS update status to EU1 UPDATED and shall enter state EMM-REGISTERED.NORMAL-SERVICE.
        The UE shall set the update status to U2 NOT UPDATED.
        A UE in CS/PS mode 1 of operation with "IMS voice not available" shall attempt to select GERAN or UTRAN radio access technology rather than E-UTRAN for the selected PLMN or equivalent PLMN. The UE shall disable the E-UTRA capability (see subclause 4.5). If the UE is in the EMM-CONNECTED mode, the UE shall locally release the established NAS signalling connection and enter the EMM-IDLE mode before selecting GERAN or UTRAN radio access technology.
        A UE in CS/PS mode 2 of operation may provide a notification to the user or the upper layers that the CS domain is not available.
        The UE shall not attempt combined attach or combined tracking area update procedure with current PLMN until switching off the UE or the UICC containing the USIM is removed.
Other EMM cause values and the case that no EMM cause IE was received are considered as abnormal cases. The combined attach procedure shall be considered as failed for EPS and non-EPS services. The behaviour of the UE in those cases is specified in subclause 5.5.1.3.6.

如上24301写的比较清楚了,CS/PS mode2的终端在关机开机前不在Combined TAU,但前提时候同一个PLMN,如果换了PLMN还是会的..
然而实际现网我遇到过多次即使发了这个原因给终端,部分终端过一段时间还是会发combined TAU,比如去了3G后再TAU回来的..

甚至在出现如下错误时,部分不符合协议的终端依然反复发TAU,所以协议是一回事情,真正实现起来又是一回事情
#40        (No EPS bearer context activated);
        The UE shall delete the list of equivalent PLMNs and deactivate all the EPS bearer contexts locally, if any, and shall enter the state EMM-DEREGISTERED.NORMAL-SERVICE. The UE shall then perform the attach procedure.

使用道具 举报

您需要登录后才可以回帖 登录 | 立即注册

站长邮箱|Archiver|51学通信 ( 粤ICP备11025688 )

GMT+8, 2024-5-21 08:47 , Processed in 0.028875 second(s), 8 queries .

Powered by Discuz! X2

© 2001-2011 Comsenz Inc.

回顶部