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US 8,509,789 B2Granted
Method of seamless roaming between wireless local links and cellular carrier networks
AssigneeKraasten Bros. Fund B.V. LLC
InventorsOliver C. Ibe, Jianyu Zeng
Life of this patent
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Abstract
A scheme that enables seamless roaming between the WLAN and the cellular carrier network by enabling a user that originates a call in the WLAN and happens to go outside the range of the WLAN to automatically switch over to the cellular carrier network without losing connection with the other party. This solution assumes that the mobile device has the capability to operate in at least two modes that include the WLAN mode and one of the cellular carrier modes, such as the GSM, IS-95 CDMA, IS-136 TDMA, and iDEN.
Claims23
A method comprising:
- facilitating, at a computing device, a communication session between a first device and a second device, wherein the computing device is local to the first device during at least a portion of the communication session;
- and
- switching, at the computing device, the communication session from a first communication path to a second communication path, wherein the first communication path passes through a wireless local link, wherein the second communication path passes through a wide area wireless network, wherein the communication session comprises voice data transmitted via session initiation protocol (SIP), and wherein the voice data comprises voice over IP (VoIP) packets, and wherein the switching is controlled by the computing device.
A gateway device comprising:
- a radio terminal;
- and
- a computing device connected to the radio terminal and configured to:
- facilitate a communication session between a first device and a second device, wherein the first device is initially local to the gateway;
- and
- switch the communication session from a first communication path to a second communication path, wherein the first communication path passes through a wireless local link, wherein the second communication path passes through a wide area wireless network, wherein the communication session comprises voice data transmitted via session initiation protocol (SIP), wherein the voice data comprises voice over IP (VoIP) packets, and wherein the switching is controlled by the gateway.
3 more elements
Dependencies are inferred from the claim text.