Handover in a mobile communication system using conference facility
First Claim
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1. A communications network comprising:
- a central controller which operates to control a zone of the network and which provides a conference call facility;
at least one gateway engaged in a call with a mobile station via a first communication channel;
means for generating a hand-off required indication indicating that handover of the call is needed;
means at the central controller for receiving said hand-off required indication and opening a conference call charnel as a second communication channel for the call; and
means for handing over said call from the first to the second communication channels and, if the handover is successful, causing the first communication channel to be closed.
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Abstract
A communications network comprises a central controller which operates to control a zone of the network and which provides a conference call facility with at least one gateway engaged in a call with a mobile station via a first communication channel, means for generating a hand-off required indication indicating that handover of the call is needed, means at the central controller for receiving said hand-off required indication and opening a conference call channel as a second communication channel for the call and means for handing over said call from the first to the second communication channels and, if the handover is successful, causing the first communication channel to be closed.
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Citations
12 Claims
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1. A communications network comprising:
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a central controller which operates to control a zone of the network and which provides a conference call facility;
at least one gateway engaged in a call with a mobile station via a first communication channel;
means for generating a hand-off required indication indicating that handover of the call is needed;
means at the central controller for receiving said hand-off required indication and opening a conference call charnel as a second communication channel for the call; and
means for handing over said call from the first to the second communication channels and, if the handover is successful, causing the first communication channel to be closed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of effecting handover of a call which at least one mobile station is engaged via a first communication channel in a communications network comprising a central controller which operates a zone of the network and provides a conference call facility, in which method:
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a hand-off required indication is issued indicating that handover of the call is needed;
the central controller receives said hand-off required indication and opens as a second communication channel a conference call channel;
handover of said call is effectuated from said first to said second communication channel; and
if the handover is successful the first communication channel is closed. - View Dependent Claims (9, 10, 11)
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12. A communications network comprising:
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a central controller which operates to control a zone of the network and which provides a conference call facility;
at least one gateway engaged in a call with a mobile station via a first communication channel;
means for generating a hand-off required indication indicating that handover of the call is needed;
means at the central controller for receiving said hand-off required indication and opening a conference call channel as a second communication channel for the call; and
means for handing over said call from the first to the second communication channels and, if the handover is successful, causing the first communication channel to be closed, wherein the central controller is operable to multiplex the first and second communication channels, such that the call is conveyed simultaneously by both of said channels until the first communication channel is closed.
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Specification