【请教】LTE如何区分某个service request是paging response还是mo-data/mo-signaling

hou3331

我在attach request消息中看到RRC-Establishment-Cause: mo-Signalling (3)，这个是什么意思哦？为什么发起UL signalling，消息类型也是MO-data？，If a SERVICE REQUEST is to request resources for UL signalling, the RRC establishment cause shall be set to MO data. (See Note 1)"originating calls"