ECHO CANCELLATION IN WIRELESS INBAND SIGNALING MODEM
First Claim
1. An in-band signaling modem comprising:
- a processor configured to—
receive digital user data for transmission to a remote location;
convert the user data into audio tones for transmission;
encode the audio tones into digital form suitable for transmission through a voice channel call session of a digital wireless network;
establish a voice channel call session on a digital wireless network;
disable any echo cancellation or echo suppression means that may be encountered in the voice channel call session;
and then transmit the user data audio tones to the remote location using the established voice channel call session.
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Accused Products
Abstract
An inband signaling modem receives digital user data for transmission to a remote location, via wireless and land line telecommunication networks. The modem converts the user data into audio tones for transmission, and encodes the audio tones into digital form suitable for transmission through a voice channel call session of a digital wireless network. After establishing a voice channel call session on a digital wireless network, the modem disables any echo cancellation or echo suppression means that may be encountered in the voice channel call session; and then transmits the user data audio tones. Preferably, disabling the echo cancellation or echo suppression means comprises transmitting a predetermined tone in the voice channel call session. Further, the modem preferably repeats the tone, to again disable echo cancellation or echo suppression means, at the beginning of each data burst during the call session.
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Citations
20 Claims
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1. An in-band signaling modem comprising:
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a processor configured to— receive digital user data for transmission to a remote location; convert the user data into audio tones for transmission; encode the audio tones into digital form suitable for transmission through a voice channel call session of a digital wireless network; establish a voice channel call session on a digital wireless network; disable any echo cancellation or echo suppression means that may be encountered in the voice channel call session; and then transmit the user data audio tones to the remote location using the established voice channel call session. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A computer-readable, non-transitory medium storing a series of instructions executable in a digital processor, the instructions arranged to cause the processor to—
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receive digital user data for transmission to a remote location; convert the user data into audio tones for transmission; encode the audio tones into digital form suitable for transmission through a voice channel call session of a digital wireless network; establish a voice channel call session on a digital wireless network; disable any echo cancellation or echo suppression means that may be encountered in the voice channel call session; and then transmit the user data audio tones to the remote location using the established voice channel call session. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A method comprising:
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receiving digital user data for transmission to a remote location; converting the user data into audio tones for transmission; encoding the audio tones into digital form suitable for transmission through a voice channel call session of a digital wireless network; establishing a voice channel call session on a digital wireless network; disabling any echo cancellation or echo suppression means that may be encountered in the voice channel call session; and then transmitting the user data audio tones to the remote location using the established voice channel call session; whereby the echo cancellation or echo suppression means will not degrade or interfere with subsequent decoding of the audio tones at the remote location to recover the digital user data. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification