Virtual gateway node for dual-mode wireless phones
First Claim
1. A virtual gateway for communicating voice and call control data between an IP-based telephone switch connected via a communication link and a dual-mode subscriber device connected via a wireless local area network (WLAN) link, comprising:
- a computing device, includinga wireless local area network interface capable of establishing a WLAN link with the dual-mode subscriber device,a network interface capable of establishing a communication link with the IP-based telephone switch, anda processor configured to;
relay voice and call control data between the dual-mode subscriber device and the IP-based telephone switch; and
create a message in the first call control signaling format initiating a call from the IP-based telephone switch to the dual-mode subscriber device via a wireless communication system,wherein;
the call control data transmitted over the communication link are in first call control signaling format and the call control data transmitted over the WLAN link are in second call control signaling format different than the first call control signaling format; and
the message initiating the call is a registration message sent to the IP-based telephone switch.
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Accused Products
Abstract
In one embodiment, a virtual gateway mediates between a dual-mode subscriber device and an IP-based PBX. In particular, the virtual gateway includes a WLAN interface for communicating with the dual-mode subscriber device and a network interface (wired or wireless) for communicating with the IP-based PBX over the Internet. As such, the virtual gateway may relay voice and call control instructions between the dual-mode subscriber device and the IP-based PBX, and may provide the same call control functions to the dual-mode subscriber device provided by the call control processor in existing dual-mode phones. The embodiment further provides a dual-mode subscriber device suitable for operation with the virtual gateway. Because the dual-mode subscriber device does not require a call control processor, the battery life and cost of the device are significantly improved.
45 Citations
20 Claims
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1. A virtual gateway for communicating voice and call control data between an IP-based telephone switch connected via a communication link and a dual-mode subscriber device connected via a wireless local area network (WLAN) link, comprising:
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a computing device, including a wireless local area network interface capable of establishing a WLAN link with the dual-mode subscriber device, a network interface capable of establishing a communication link with the IP-based telephone switch, and a processor configured to; relay voice and call control data between the dual-mode subscriber device and the IP-based telephone switch; and create a message in the first call control signaling format initiating a call from the IP-based telephone switch to the dual-mode subscriber device via a wireless communication system, wherein; the call control data transmitted over the communication link are in first call control signaling format and the call control data transmitted over the WLAN link are in second call control signaling format different than the first call control signaling format; and the message initiating the call is a registration message sent to the IP-based telephone switch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for communicating voice and call control data between an IP-based telephone switch and a dual-mode subscriber device capable of operation within a wireless communication system, comprising the steps of:
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establishing a wireless local area network (WLAN) link with the dual-mode subscriber device; establishing a communication link with the IP-based telephone switch; relaying voice and call control data between the dual-mode subscriber device and the IP-based telephone switch; and creating a message in the first call control signaling format initiating a call from the IP-based telephone switch to the dual-mode subscriber device via a wireless communication system, wherein; the call control data transmitted over the communication link are in a first call control signaling format and the call control data transmitted over the WLAN link are in second call control signaling format different than the first call control signaling format; and the message initiating the call is a registration message sent to the IP-based telephone switch. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification