System for TDMA mobile-to-mobile VSELP CODEC bypass
AssigneeNortel Networks Limited
InventorsHermon Pon, Rafi Rabipour, Chung-Cheung Chu
Life of this patent
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Abstract
In a TDMA mobile-to-mobile connection, the end-to-end audio signal quality as well as system performance can be improved by providing digital signal processors the capability to automatically switch configuration such that each digital signal processor in a mobile-to-mobile communication connection can automatically identify a TDMA mobile-to-mobile connection and bypass the speech encoding and decoding processes within the digital signal processors. The two digital signal processors are virtually connected at the channel codecs.
Claims34
A transmission system, comprising:
- a first signal processor;
- a second signal processor;
- and
- a transmission facility linking said first signal processor to said second signal processor;
- said first signal processor being operable to convert a traffic signal from a first signal format to a second signal format for transmission on said transmission facility to said second signal processor;
- said second signal processor being operable to reconvert said traffic signal from said second signal format to said first signal format;
- said first signal processor further being operable to transmit a control signal to said second signal processor;
- said second signal processor being responsive to said control signal transmitted by said first signal processor to send a control signal to said first signal processor;
- and
- said first signal processor being responsive to said control signal transmitted by said second signal processor to transmit said traffic signal to said second signal processor in said first signal format.
A signal processor, comprising:
- a signal format converter for converting a traffic signal from a first signal format to a second signal format;
- a message transmitter for transmitting control signals;
- a message receiver for receiving control signals;
- a controller for controlling said signal format converter and said message transmitter, said controller operating said message transmitter to transmit a control signal when said signal format converter is enabled to convert said traffic signal from said first signal format to said second signal format and, in response to receipt of a control signal by said message receiver, to enable said signal format converter to pass said traffic signal in said first signal format.
A signal processor comprising:
- a signal format converter for converting a traffic signal from a second signal format to a first signal format;
- a message transmitter for transmitting control signals;
- a controller for controlling said signal format converter and said message transmitter:
- to transmit a control signal on receipt of a control signal;
- to recognize that the traffic signal is being received in the first signal format;
- and
- in response to recognition that the traffic signal is being
- received in the first signal format, to pass the traffic signal in the first signal format.
A method for operating a transmission system, comprising:
- providing a first signal processor, a second signal processor and a transmission facility linking the first signal processor to the second signal processor, the first signal processor being operable to convert a traffic signal from a first signal format to a second signal format for transmission on the transmission facility to the second signal processor, and the second signal processor being operable to reconvert the traffic signal from the second signal format to the first signal format;
- transmitting a control signal from the first signal processor to the second signal processor;
- in response to receipt of the control signal transmitted by the first signal processor at the second signal processor, transmitting a control signal from the second signal processor to the first signal processor;
- and
- in response to receipt of the control signal transmitted by the second signal processor at the first signal processor, the first signal processor transmitting the traffic signal to the second signal processor in the first signal format.
A method for operating a signal processor, comprising:
- providing a signal format converter for converting a traffic signal from a first signal format to a second signal format, a message transmitter for transmitting control signals, a message receiver for receiving control signals, and a controller for controlling the signal format converter and the message transmitter;
- when the signal format converter is enabled to convert the traffic signal from the first signal format to the second signal format, transmitting a control signal via the message transmitter;
- and
- in response to receipt of a control signal by the message receiver, enabling the signal format converter to pass the traffic signal in the first signal format.
A method of operating a signal processor comprising:
- converting a received signal from a second signal format to a first signal format;
- transmitting a control signal on receipt of a control signal;
- recognizing that the traffic signal is being received in the first signal format;
- and
- in response to recognition that the traffic signal is being received in the first signal format, passing the traffic signal in the first signal format.
A transmission system, comprising a first signal processor, a second signal processor and a transmission facility linking the first signal processor to the second signal processor;
- the first signal processor being operable to convert a traffic signal from a first signal format to a second signal format for transmission on the transmission facility to the second signal processor;
- the second signal processor being operable to reconvert the traffic signal from the second signal format to the first signal format;
- the first signal processor further being operable to transmit a first control signal to the second signal processor;
- the second signal processor being responsive to the first control signal to send a second control signal to the first signal processor;
- characterized in that:
- the first signal processor is responsive to the second control signal to interrupt conversion of the traffic signal from the first signal format to the second signal format so that the traffic signal is transmitted from the first signal processor to the second signal processor in the first signal format and to transmit a third control signal to the second signal processor;
- and
- the second signal processor is responsive to the third control signal to interrupt reconversion of the traffic signal from second signal format to the first signal format.
A signal processor comprising:
- a signal format converter for converting a traffic signal from a first signal format to a second signal format;
- a message transmitter for transmitting control signals;
- a message receiver for receiving control signals;
- and
- a controller for controlling the signal format converter and the message transmitter;
- characterized in that the controller operates the message transmitter to transmit a first control signal when the signal format converter is enabled to convert the traffic signal from the first signal format to the second signal format and, in response to receipt of a second control signal by the message receiver, to disable the signal format converter and to operate the message transmitter to transmit a third control signal.
A method for operating a transmission system, the transmission system comprising a first signal processor, a second signal processor and a transmission facility linking the first signal processor to the second signal processor, the first signal processor being operable to convert a traffic signal from a first signal format to a second signal format for transmission on the transmission facility to the second signal processor and the second signal processor being operable to reconvert the traffic signal from the second signal format to the first signal format, the method comprising:
- transmitting a first control signal from the first signal processor to the second signal processor;
- in response to receipt of the first control signal by the second signal processor, transmitting a second control signal from the second signal processor to the first signal processor;
- characterized in that.
- in response to receipt of the second control signal by the first signal processor, the first signal processor interrupts conversion of the traffic signal from the first signal format to the second signal format so that the traffic signal is transmitted from the first signal processor to the second signal processor in the first signal format and transmits a third control signal to the second signal processor;
- and
- in response to receipt of the third control signal by the second signal processor, the second signal processor is interrupts reconversion of the traffic signal from second signal format to the first signal format.
A method for operating a signal processor, comprising a signal format converter for converting a traffic signal from a first signal format to a second signal format, a message transmitter for transmitting control signals, a message receiver for receiving control signals, and a controller for controlling the signal format converter and the message transmitter,
- the method characterized in that the controller operates the message transmitter to transmit a first control signal when the signal format converter is enabled to convert the traffic signal from the first signal format to the second signal format and, in response to receipt of a second control signal by the message receiver, to disable the signal format converter and to operate the message transmitter to transmit a third control signal.
Dependencies are inferred from the claim text.