| 摘要 |
The present invention provides a method involving a mobile unit that is registered with a home subscription server. The method includes determining, at the home subscription server, a time interval during which the mobile unit is prohibited from registering for call sessions. The method also includes transmitting, from the home subscription server to a call session control function, a deregistration message instructing the call session control function to deregister the mobile unit during the time interval.
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