如何来理解GSMSS：CUG(ClosedUserGroupETSISPEC里面的描述如下：TheClosedUserGroup(CUG)SupplementaryServiceenablessubscribers,connectedtoaPLMNandpossiblyalsoothernetworks,toformclosedusergroups(CUGs)toandfromwh

Question

如何来理解GSM SS：CUG(Closed User Group
ETSI SPEC 里面的描述如下：
The Closed User Group (CUG) Supplementary Service enables subscribers,connected to a PLMN and possibly also
other networks,to form closed user groups (CUGs) to and from which access is restricted.A specific user may be a
member of one or more CUGs.Members of a specific CUG can communicate among each other but not,in general,with
users outside the group.
The ability to set up emergency calls remains unaffected.

Answer 1

你也是做手机软件研发的吧?我是这样理解的：闭合客户群(CUG)：能使一些客户构成闭合客户群,呼入和呼出该客户群要受限制.一个特定的移动客户可以是一个或多个CUG的成员.一个特定CUG的成员彼此间可以相互进行通信,但一般不能与客户群外的客户通信.可以建立紧急呼叫.