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Assignee: AT&T Corp.


Location: New York, NY
No. of patents: 1213

                    31  
NumberTitleIssue Date
6711152Routing over large clouds
The present invention discloses an efficient architecture for routing in a very large autonomous system where many of the layer 3 routers are attached to a common connection-oriented layer 2 subnetwork, such as an ATM network. In a preferred embodiment...
03/23/2004
6711128System and method for improving transport protocol performance in communication networks having lossy links
Providing transport protocol within a communication network having a lossy link. The receiver distinguishes between packets received with non-congestion bit errors and packets having been not at all received due to congestion. When packets are received with non-cong...
03/23/2004
6710719Detection system for determining orientation information about objects
A system which enables the orientation of a device in a specified environment to be determined in relation to a plurality of sensing receivers positioned at known points in or around the specified environment. A directional transmission from a directional transmitte...
03/23/2004
6711121Orthogonal code division multiplexing for twisted pair channels
A plurality of data signals are separated into parallel bit streams with each parallel stream having a bandwidth characteristic such that the combined cumulative effect of all the individual bandwidths produces a spectral characteristic of the data signals that matc...
03/23/2004
6708149Vector fixed-lag algorithm for decoding input symbols
The present invention discloses an apparatus and method of decoding information received over a noisy communications channel to determine the intended transmitted information. The present invention uses a vector fixed-lag algorithm to determine the probabilities of ...
03/16/2004
6708108Vehicle navigation system
A vehicle navigation system comprises a processor connected to a wireless message receiver, such as a cellular telephone. The system includes an application which checks each message received by the telephone. If the message is recognised as being intended for navig...
03/16/2004
6707949Generalized scalability for video coder based on video objects
A video coding system that codes video objects as scalable video object layers. Data of each video object may be segregated into one or more layers. A base layer contains sufficient information to decode a basic representation of the video object. Enhancement layers...
03/16/2004
6707907Digital-cross-connect system single element restoration technique
Restoration of an inoperative network element (12) such as a digital cross-connect system is accomplished by receiving updates from each element as they occur in a local controller network (18). The local controller network forwards the updates to a DC...
03/16/2004
6707886Method and system for testing subscriber loops using touchtone telephone signals
A subscriber loop test apparatus relates to the testing of a subscriber loop by the use of a touchtone telephone. The touchstone buttons on a telephone provide Dual-Tone, Multiple Frequencies for each key pressed. For example, referring to FIG. 1, pressing th...
03/16/2004
6707789Flexible SONET ring with integrated cross-connect system
Flexibility is achieved in provisioning communication rings with an integrated DCS that allows any port that is connected to a line interface unit within the integrated DCS to be coupled within the integrated DCS—pursuant to software controlled provisioning—to a...
03/16/2004
6707819Method and apparatus for the encapsulation of control information in a real-time data stream
Method and device provide for the encapsulation of control information in a real-time data stream. In one embodiment a method of encapsulating data in an information frame is provided. This information frame has a payload portion and a trailer portion wherein the tr...
03/16/2004
6707802Method and apparatus for code division switching of communication signals by trunk coding
A method provides for trunk group satellite switching using a code division multiple access (CDMA) scheme. The method includes receiving inbound satellite beams carrying individually encoded user signals including a plurality of inbound trunk groups, processing and ...
03/16/2004
6708194Porting POSIX-conforming operating systems to Win32 API-conforming operating systems
Techniques for porting operating systems of a first class whose representatives include operating systems implementing the POSIX standard to operating systems of a second class whose representatives include operating systems implementing the Win32 API. Processes bel...
03/16/2004
                    31  
 
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