Invention Grant
US09338718B2 Voice call resumption on a legacy network 有权
遗留网络上的语音呼叫恢复

Voice call resumption on a legacy network
Abstract:
A method for resuming a voice call on a legacy network is provided. The method can include a wireless communication device establishing a voice call with a remote device over a first cellular network; determining that a connection quality of the first cellular network has dropped below a threshold connection quality; sending a notification that the wireless communication device is releasing the voice call to transition to a legacy cellular network and will resume the voice call on the legacy cellular network; releasing the voice call on the first cellular network; transitioning to the legacy cellular network; establishing a second voice call with the remote device on the legacy cellular network; and using the second voice call to resume the voice call with the remote device.
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