callforwarding调查 freight forwarding

call forwarding介绍

call forwarding是call增值业务；在TS24082中有详细的介绍 呼叫转移有3方用户

整个流程即：

各种呼叫转移流程

CFU 无条件呼叫转移

CFB 用户忙时呼叫转移

CFNRy 无回应呼叫转移

CFNRc 用户不可达呼叫转移

设置呼叫转移

MS                                    Network

                   REGISTER

  ------------------------------------------------------------------------>

       Facility (Invoke = ActivateSS (呼叫转移类型, BasicServiceCode))

                RELEASE COMPLETE

  <-----------------------------------------------------------------------

          Facility (Return result = DeactivateSS (SS-Status))

注册失败情况：从网络发以下请求中其中一种：

                RELEASE COMPLETE

  <- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - ----

            Facility (Return error (Error))

                RELEASE COMPLETE

  <- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

            Facility (Reject (Invoke_problem))

取消呼叫转移

MS                                   Network

                   REGISTER

  --------------------------------------------------------------------------->

       Facility (Invoke = DeactivateSS (呼叫转移类型, BasicServiceCode))

                RELEASE COMPLETE

  <---------------------------------------------------------------------------

          Facility (Return result = DeactivateSS (SS-Status))

取消呼叫转移失败情况：从网络发以下请求中其中一种：

                RELEASE COMPLETE

  <- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

            Facility (Return error (Error))

                RELEASE COMPLETE

  <- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

            Facility (Reject (Invoke_problem))

呼叫转移代码实现

呼叫转移界面显示实现

主要在callnotifer.java中getSuppSvcNotificationText()；主要实现了若用户设置好呼叫转移后，发生呼叫转移时以toast形式提示给用户。
主要分下面2个方面（A 打电话给B，B设置呼叫转移到C；）

SETUP消息中包含facility消息表明此为一个forwarding call

SETUP消息中没有facility消息但包含redirecting number的forwarding call

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