Wireless handoffs between multiple wireless networks

摘要

A wireless communications device is disclosed. The wireless communications device is configured to support a call over a cellular network or an IP network to a remote communications device. The wireless communications device is further configured to handoff the call between the cellular network and the IP network. An Interworking Function (IWF) is configured to maintain a call between a wireless communications device and a communications device as the wireless communications device is handed off between a cellular network and an IP network.

主权项

1. A wireless communications device, comprising:
a processor configured to support a call over a first network that uses a first access technology or a second network that uses a second access technology with a remote communications device, the processor being further configured to handoff the call between the first network and the second network in a way that is transparent to a user of the wireless communications device; wherein the processor is further configured to handoff the call from the first network to the second network by establishing a connection to the second network to support the call with the remote communications device, answering a page in response to a caller identification message from a network entity that directs the wireless communications device to answer the page while currently engaged in the call over the first network, conferencing the wireless communications device into the call over the second network, and terminating a connection to the first network that was previously supporting the call with the remote communications device; and wherein the processor is further configured to establish the connection to the second network in response to signaling from the network entity supporting a connection between the wireless communications device and the remote communications device over the first network, the signaling from the network entity configured by the network entity to request that the processor establish the connection.