At&t Intellectual Property I, L.p.

Ameritech Corporation

At&t Knowledge Ventures, LP

Sbc Properties, L.p.

Sbc Technology Resources, Inc.

Sbc Knowledge Ventures, L.p.

Thomas J J Starr

Carlton Ligar Brown

Dale Brian Halling

Nelson Leon Ledbetter

Phillip George Skeba

Edward R Folds

Michael John Rude

Joseph Martin Charboneau

Eugene Lane Edmon

Systems and Methods for controlling an interleaver are disclosed. Generally, a first and second signal are received, wherein the first and second signals are selected from the group consisting of a signal to noise ration signal, a data rate signal, and a bit error rate signal. An interleaver control signal is then generated based on the first and second signals.

Method and system for controlling an interleaver

A method and device for transmission line testing are provided. The method includes applying, at a customer premises device, a test signal to a transmission line coupled to the customer premises device. The method further includes measuring, at the customer premises device, a reflection of the test signal. The method also includes determining, at the customer premises device, a characteristic of the transmission line based on the reflection of the test signal. The method includes determining, at the customer premises device, whether the transmission line supports a transmission service based on the characteristic. The method further includes generating an output, at the modem device, the output indicative of whether the transmission line supports the transmission service.

Method and apparatus for transmission line testing

Example multiple channel systems for a twisted pair telephone wire local loop system are disclosed. An example method includes implementing, via a digital filter at a subscriber gateway, a frequency translation received from a first controller of a switching office in response to a bandwidth allocation request, wherein the frequency translation moves a signal to an available frequency band identified by the first controller of the switching office; operating a second controller at the subscriber gateway to control the digital filter; and transmitting a plurality of frequency division multiplexed signals via a first transceiver configured to send and receive via multiple independent channel located at the subscriber gateway.

Multiple channel system for a twisted pair telephone wire local loop system

A method and device for transmission line testing are provided. A particular modem device includes a transmission line interface to connect to a transmission line. The modem device also includes a memory to store a plurality of transmission line tests. The modem device also includes a controller coupled to the memory and to the transmission line interface. The controller selects one or more tests of the plurality of transmission line tests from the memory. The controller also performs the selected one or more tests on the transmission line and detects an electrical characteristic of the transmission line.

The system () has a subscriber digital filter system () connected to the twisted pair telephone wire (). A subscriber controller () sends control signals to the subscriber digital filter system (). An office digital filter system () is connected to the twisted pair telephone wire (). An office controller () sends control signals to the office digital filter system ().

A method of managing data transmission is provided and includes measuring a first number of payload bits communicated over a bearer during a first time period. The first number of measured payload bits is divided by a length of the first time period to yield a short term average bit rate for the first time period. Also, a bit rate margin is added to the short term average bit rate for to yield a total bearer bit rate for the first time period. Further, a bearer bit rate can be selectively provisioned based on the total bearer bit rate for the first time period. The bearer bit rate can be provisioned based on whether the bearer is a fixed bearer or an adaptive bearer.

System and method of managing digital data transmission

A method a system for automatically controlling an adaptive interleaver involves monitoring performance parameters of a transmission system and controlling the adaptive interleaver in response to the performance parameters. The SNR and the data rate of the transmission system are preferably determined. The data rate is analyzed and the adaptive interleaver is adjusted in response to the data rate and the SNR. Alternatively, the BER and the data rate of the transmission system are determined. The data rate is analyzed and the adaptive interleaver is adjusted in response to the data rate and the BER. Alternatively, any one of the SNR, BER or data rate can alone be monitored and used to the adaptive interleaver. The system provides a effective system for adjusting an adaptive interleaver in response to performance parameters of a transmission system.

Method and system for adaptive interleaving

The system () has a subscriber digital filter system ()connected to the twisted pair telephone wire (). A subscriber controller () sends control signals to the subscriber digital filter system (). An office digital filter system () is connected to the twisted pair telephone wire (). An office controller () sends control signals to the office digital filter system ().

A high-speed data transmission network system () is provided. The system () includes a plurality of subscriber premises () that transmit a first upstream signal () on a first frequency band to a central office or a remote terminal (), which is in communication with the plurality of subscriber premises (). The central office or the remote terminal () broadcasts a downstream signal () to each of the plurality of subscriber premises () on a second frequency band, which is higher in frequency than said first frequency band. The downstream signal () contains one or more subscriber group signals and a plurality of subscriber specific signals. A controller () provides each of the subscriber premises () access to one or more of the one or more subscriber group signals and to a corresponding subscriber specific signal of the plurality of subscriber specific signals. A method of performing the same is also provided. A method of adjusting performance of transmitted signals between a central office () and a subscriber premise () within the high-speed data communication network system () is additionally provided.

Multi-pair broadband transmission system

A system for implementing multiple communication channels on a single twisted pair transmission line is disclosed. The system derives additional communication channels by way of a separate transceiver unit for each derived line. Each transceiver unit communicates in a separate predetermined frequency band. Each transceiver unit, upon connection to the transmission line, automatically utilizes the lowest unoccupied frequency band by monitoring each frequency band for the presence of signal power. Thus, as many derived lines as will be supported by the customer transmission loop can be readily added.

Method and system for conveying multiple calls on a single telephone line

A method and system for optimizing coding gain that alters the backsearch buffer length and/or the input buffer length of a decoder in response to one or more transmission performance characteristics of the system. The performance characteristics are monitored to determine the performance of the system. The measured transmission performance characteristics are used to control the lengths of the backsearch buffer and the input buffer. The measured transmission performance characteristics along with the backsearch length and/or the input buffer length are analyzed and compared with simulated decoding results. In accordance with the simulated results, the system determines the optimal size of the backsearch buffer and the input buffer needed to achieve a desired performance target. The system adjusts the size of the backsearch buffer length and/or the input buffer length to equal the determined optimal lengths.

Growing community of inventors

Barrington, IL, United States of America

Thomas J J Starr