Processing packet-switched voice calls directed to a mobile unit operating in circuit-switched mode
AssigneeTelefonaktiebolaget LM Ericsson
InventorsHenrik Hummelgren, Dick Andersson, Torgny Karlsson
Life of this patent
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Abstract
A packet-switched voice call directed to a mobile subscriber unit in a cellular communication network is processed by determining whether the mobile subscriber unit is in a circuit-switched mode of operation and, if so, either forwarding the information in the packet-switched voice call to a destination other than the mobile subscriber unit or notifying the mobile subscriber unit that the packet-switched voice call is waiting.
Claims36
A method of processing a packet-switched voice call directed to a mobile subscriber unit in a cellular communication network, comprising:
- determining that the mobile subscriber unit is in a circuit-switched mode of operation;
- and
- forwarding the information in the packet-switched voice call to a destination other than the mobile subscriber unit, wherein said forwarding step includes conducting a packet-switched voice session between a source of the packet-switched voice call and the destination and wherein said conducting step includes changing a source address of a voice packet that is en route from the source to the destination.
A method of processing a packet-switched voice call directed to a mobile subscriber unit in a cellular communication network, comprising:
- determining that the mobile subscriber unit is in a circuit-switched mode of operation;
- notifying the mobile subscriber unit of the packet-switched voice call;
- determining that the mobile subscriber unit has rejected the packet-switched voice call;
- forwarding the information in the packet-switched voice call to a destination other than the mobile subscriber unit;
- and
- conducting a packet-switched voice session between a source of the packet-switched voice call and the destination, said conducting step includes changing a source address of a voice packet that is en route from the source to the destination.
A switching apparatus for processing information in a packet-switched voice call directed to a mobile subscriber unit of a cellular communication network, comprising:
- an input for receiving the packet-switched voice call;
- a further input for receiving information indicative of whether the mobile subscriber unit is busy in a circuit-switched voice call;
- and
- an output through which the information in the packet-switched voice call is forwarded to a destination other than the mobile subscriber unit if the mobile subscriber unit is busy in a circuit-switched voice call, wherein said output is further operable to conduct a packet-switched voice session between a source of the packet-switched voice call and the destination and wherein said switching apparatus is adapted to change a source address of a voice packet that is en route from the source to the destination.
A switching apparatus for processing information in a packet-switched voice call directed to a mobile subscriber unit of a cellular communication network, comprising:
- an input for receiving the packet-switched voice call;
- a further input for receiving information indicative of whether the mobile subscriber unit is busy in a circuit-switched voice call;
- and
- an output through which the mobile subscriber unit is notified that the packet-switched voice call is waiting if the mobile subscriber unit is busy in a circuit-switched voice call, wherein said output is further operable to conduct a packet-switched voice session between a source of the packet-switched voice call and the destination and wherein said switching apparatus is adapted to change a source address of a voice packet that is en route from the source to the destination.
Dependencies are inferred from the claim text.