Alcatel-Lucent

About: Alcatel-Lucent is a based out in Stuttgart, Germany. It is known for research contribution in the topics: Signal & Network packet. The organization has 37003 authors who have published 53332 publications receiving 1430547 citations. The organization is also known as: Alcatel-Lucent S.A. & Alcatel.

Fiber optic cable having spliceless fiber branch and method of making

Abstract: A spliceless optical fiber cable has a main distribution cable having a plurality of optical fibers disposed therein and at least one stub or drop cable extending from the distribution cable at one or more branch points. The stub or drop cables are configured with the distribution cable in a manner such that no splices are required. At each branch point, an optical fiber branch module is utilized for protecting the optical fibers from moisture and mechanical damage, providing a strong anchoring point for the stub or drop cable, and insuring that the minimum bend radius is not violated. The spliceless optical fiber cable is made by accessing the specified optical fibers at a disconnect point along the length of the distribution cable and cutting the specified optical fibers. At the branch point, the specified optical fibers are again accessed and carefully pulled from within the buffer tube and protective elements of the distribution cable so that a length of the specified optical fibers is disposed outside of the distribution cable.

Adaptive hybrid-ARQ coding schemes for slow fading channels in mobile radio systems

Abstract: A method and apparatus for performing adaptive hybrid automatic repeat request (ARQ) coding in which the coding is modified based on the acknowledgements returned by the receiver. In accordance with one illustrative embodiment of the present invention, the state of the channel is implicitly determined by the transmitter based upon the frequency of acknowledgments (ACKs and NACKs) arriving from the receiver. For example, since a NACK implies a weak received signal strength, the code rate of the FEC is advantageously reduced in response to such an acknowledgement. On the other hand, the code rate of the FEC is advantageously increased in response to an ACK. In accordance with another illustrative embodiment of the present invention, the acknowledgement returned by the receiver is modified to convey the number of errors in the corresponding received data packet. In particular, a Reed-Solomon (RS) outer code is employed in the FEC to enable the receiver to determine the number of errors in the received data packet. If the acknowledgement indicates a large number of errors at the receiver, the code rate of the FEC is advantageously reduced in response thereto.

System, controller and method for alerting mobile subscribers about emergency situations

Abstract: A system, controller and method are described that can effectively alert a mobile subscriber about an emergency situation including, for example, a weather alert, a hostage situation or a hazardous material leak. In particular, the system includes an emergency warning system capable of generating information identifying a geographic area in which there is an emergency situation. The system also includes a controller capable of receiving the information identifying the troubled geographic area and is further capable of requesting and receiving from a wireless communications network a list of the mobile subscribers currently located within the troubled geographic area. Thereafter, the controller is capable of initiating an emergency notification message that is sent to at least one of the mobile subscribers. The emergency notification message can be in the form of a page, a voice message or a short text message.

Social science, technical systems, and cooperative work: beyond the great divide

Abstract: From the Publisher: The "great divide" between the approaches of systems developers and those of social scientists to computer supported cooperative work has been vigorously debated in the systems development literature. In spite of their differences in style, the two groups have been cooperating more and more in the last decade, as the "people problems" associated with computing become increasingly evident to everyone. This book is the first to address directly the problem of how to bridge the divide. It offers an exciting overview of the cutting edge of research and theory, and will constitute a solid foundation for the rapidly coalescing field of social informatics.