SEAMLESS CALL SWITCHING IN A DUAL MODE ENVIRONMENT
4 Assignments
0 Petitions
Accused Products
Abstract
Methods and apparatus for providing a seamless switching of voice calls between different wireless networks are disclosed. In one illustrative example, a mobile communication device has a processor and one or more wireless transceivers coupled to the processor. The one or more wireless transceivers include a first transceiver portion operative in accordance with a first wireless network (e.g. a GSM/GPRS cellular network) and a second transceiver portion operative in accordance with a second wireless network (e.g. an 802.11 wireless network). A voice call is maintained between the mobile device and a communication terminal through call control equipment. The processor of the mobile device is operative to maintain voice communications for the voice call over a traffic channel established between the mobile device and the first wireless network using the first transceiver portion; cause a connecting call to be established with the communication terminal through the call control equipment in response to a predetermined condition, where the connecting call involves a traffic channel established between the second wireless network and the mobile device using the second transceiver portion; and after the connecting call is established, maintain voice communications for the voice call over the traffic channel established between the second wireless network and the mobile device.
26 Citations
71 Claims
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1-51. -51. (canceled)
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52. A method for use by call control equipment in switching communication operations for a mobile communication device between first and second wireless networks, the method comprising the acts of:
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receiving, at the call control equipment, a call request for a call from a calling party to a mobile communication device which operates in one of the first wireless network and the second wireless network, where the call request was initiated with use of a first identification number of the mobile communication device which identifies the mobile communication device in the first wireless network; in response to receiving the call request when the mobile communication device is operating in the first wireless network; causing the call to be connected through the call control equipment to the mobile communication device in the first wireless network with use of the first identification number of the mobile communication device which identifies the mobile communication device in the first wireless network; after the call is connected, in response to a predetermined condition indicative of a switching of communication operation of the mobile communication device from the first wireless network to the second wireless network, causing a connecting call to be established with the mobile communication device in the second wireless network via the call control equipment; in response to receiving the call request when the mobile communication device is operating in the second wireless network; causing the call to be connected through the call control equipment to the mobile communication device in the second wireless network with use of a second identification number which identifies the mobile communication device in the second wireless network; and after the call is connected, in response to identifying a predetermined condition indicative of a switching of communication operation of the mobile communication device from the second wireless network to the first wireless network, causing a connecting call to be established with the mobile communication device in the first wireless network via the call equipment. - View Dependent Claims (53, 54, 55, 56, 57, 58)
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59. Call control equipment, comprising:
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one or more processors; memory coupled to the one or more processors; computer instructions stored in the memory; the computer instructions being executable by the one or more processors for; receiving a call request for a call from a calling party to a mobile communication device which operates in one of a first wireless network and a second wireless network, where the call request was initiated with use of a first identification number of the mobile communication device which identifies the mobile communication device in the first wireless network; in response to receiving the call request when the mobile communication device is operating in the first wireless network; causing the call to be connected through the call control equipment to the mobile communication device in the first wireless network with use of the first identification number which identifies the mobile communication device in the first wireless network; after the call is connected, in response to a predetermined condition indicative of a switching of communication operation of the mobile communication device from the first wireless network to the second wireless network, causing a connecting call to be established with the mobile communication device in the second wireless network via the call control equipment; in response to receiving the call request when the mobile communication device is operating in the second wireless network; causing the call to be connected through the call control equipment to the mobile communication device in the second wireless network with use of a second identification number which identities the mobile communication device in the second wireless network; and after the call is connected, in response to identifying a predetermined condition indicative of a switching of communication operation of the mobile communication device from the second wireless network to the first wireless network, causing a connecting call to be established with the mobile communication device in the first wireless network via the call equipment. - View Dependent Claims (60, 61, 62, 63, 64, 65, 66)
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67. A communication system, comprising:
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a wireless local area network (WLAN); a cellular telecommunications network; a plurality of mobile communication devices operative for communications in the WLAN and the cellular telecommunications network; call control equipment which is operative to; receive a call request for a call from a calling party to a mobile communication device operating in one of the WLAN and the cellular telecommunications network, where the call request was initiated with use of a first identification number of the mobile communication device which identifies the mobile communication device in the WLAN; in response to receiving the call request when the mobile communication device is operating in the WLAN; cause the call to be connected through the call control equipment to the mobile communication device in the WLAN with use of the first identification number of the mobile communication device which identifies the mobile communication device in the WLAN; after the call is connected, in response to a predetermined condition indicative of a switching of communication operation of the mobile communication device from the WLAN to the cellular telecommunications network, cause a connecting call to be established with the mobile communication device in the cellular telecommunications network via the call control equipment; in response to receiving the call request when the mobile communication device is operating in the cellular telecommunications network; cause the call to be connected through the call control equipment to the mobile communication device in the cellular telecommunications network with use of a second identification number which identifies the mobile communication device in the cellular telecommunications network; and after the call is connected, in response to identifying a predetermined condition indicative of a switching of communication operation of the mobile communication device from the cellular telecommunications network to the WLAN, cause a connecting call to be established with the mobile communication device in the WLAN via the call equipment. - View Dependent Claims (68, 69, 70)
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71. A communication system, comprising:
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a cellular telecommunications network; a wireless local area network (WLAN); a plurality of mobile communication devices operative for communications in the cellular telecommunications network and the WLAN; call control equipment which is operative to; receive a call request for a call from a calling party to a mobile communication device operating in one of the cellular telecommunications network and the WLAN, where the call request was initiated with use of a first identification number which identifies the mobile communication device in the cellular telecommunications network; in response to receiving the call request when the mobile communication device is operating in the cellular telecommunications network; cause the call to be connected through the call control equipment to the mobile communication device in the cellular telecommunications network with use of the first identification number which identifies the mobile communication device in the cellular telecommunications network; after the call is connected, in response to a predetermined condition indicative of a switching of communication operation of the mobile communication device from the cellular telecommunications network to the WLAN, cause a connecting call to be established with the mobile communication device in the WLAN via the call control equipment; in response to receiving the call request when the mobile communication device is operating in the WLAN; cause the call to be connected through the call control equipment to the mobile communication device in the WLAN with use of a second identification number which identifies the mobile communication device in the WLAN; and after the call is connected, in response to identifying a predetermined condition indicative of a switching of communication operation of the mobile communication device from the WLAN to the cellular telecommunications network, cause a connecting call to be established with the mobile communication device in the cellular telecommunications network via the call equipment.
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Specification