| 摘要 |
A method which supports Mobile Station (MS) handoff back operations across tandem switches makes use of a modification to the ANSI-41 Standard. The method includes the steps of determining that a handoff back call connection operation to a Target Mobile Switching Center (involved in the call path and not directly connected to the Serving Mobile Switching Center) should occur, verifying that a designated channel of the Target Mobile Switching Center (Target MSC), which may be an Anchor MSC (AMSC) or Tandem MSC (except an MSC directly connected to the Serving MSC) is available to support the MS, establishing a third inter-MSC trunk between the Serving MSC and the Target MSC, moving the MS to the designated channel, and directing a tandem MSC, the Target MSC, and the SMSC to release unused inter-MSC trunks. The method operates within a telecommunications network, including an MS served by a Serving MSC connected along a call path to one or more Tandem MSCs and the AMSC (which can also be the TMSC, but not an MSC directly connected to the SMSC), and which is connected in series with the Tandem MSCs by one or more inter-MSC trunks.
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