Bell Labs researchers demonstrate wireless ATM LAN technologies that support MPEG-2 video and internet surfing for mobile users.MURRAY HILL Murray Hill may refer to one of the following places:
(communications) Asynchronous Transfer Mode - (ATM, or "fast packet") A method for the dynamic allocation of bandwidth using a fixed-size packet (called a cell). See also ATM Forum, Wideband ATM. ATM acronyms. Indiana acronyms. (ATM) local area network (LAN (Local Area Network) A communications network that serves users within a confined geographical area. The "clients" are the user's workstations typically running Windows, although Mac and Linux clients are also used. ). The demonstration, based on Bell Labs' research, is the most sophisticated system-level wireless ATM prototype to date and features wireless laptop computers running MPEG (Moving Pictures Experts Group) An ISO/ITU standard for compressing digital video. Pronounced "em-peg," it is the universal standard for digital terrestrial, cable and satellite TV, DVDs and digital video recorders (DVRs). (Motion Picture Expert Group)-2 video and Internet content in a building environment. Bell Labs has teamed with Sun Microsystems in the Mobile Information Infrastructure (MII 1. (body) MII - A consortium of Microsoft, IBM, and Intel. 2. (storage) MII - A broadcast component video tape format licensed by Panasonic. ) project to develop and demonstrate technologies that can provide digital video and multimedia services to wireless information appliances. MII is a three-year program, begun in November, 1995, that is partially funded by the U.S. government's Advanced Technology Program (ATP ATP: see adenosine triphosphate. ATP in full adenosine triphosphate Organic compound, substrate in many enzyme-catalyzed reactions (see catalysis) in the cells of animals, plants, and microorganisms. ), administered by the National Institute of Standards and Technology National Institute of Standards and Technology, governmental agency within the U.S. Dept. of Commerce with the mission of "working with industry to develop and apply technology, measurements, and standards" in the national interest. (NIST (National Institute of Standards & Technology, Washington, DC, www.nist.gov) The standards-defining agency of the U.S. government, formerly the National Bureau of Standards. It is one of three agencies that fall under the Technology Administration (www.technology. ). "MII addresses the technologies needed for reliable, high- speed wireless multimedia communications in the fast-paced corporate environment," said Kai Eng, head of Bell Labs' Broadband Systems Research Department. "ATM holds the promise to integrate video, voice, and data over wired and wireless networks. Bell Labs has a tradition of excellence in broadband wireless research. Commercially, outside the scope of the ATP research effort, Lucent Technologies' WaveLAN product line already provides customers with the most advanced broadband wireless capabilities available today." Wireless High-Speed Networking The MII project is addressing key technological challenges for wireless high-speed networking. The MII project employs an architecture of wireless ATM LANs interconnected through ATM switches. Each wireless ATM LAN consists of portable base stations (PBSs), providing wireless coverage for mobile laptops. High-speed wireless (radio or infrared) links are provided between the laptops and the PBS PBS in full Public Broadcasting Service Private, nonprofit U.S. corporation of public television stations. PBS provides its member stations, which are supported by public funds and private contributions rather than by commercials, with educational, cultural, . The PBSs are compact (the size of a coffee can) and can be deployed in a flexible and reconfigurable manner to provide end-to-end ATM connections to mobiles. The current prototype system is designed to highlight key aspects of the MII vision. The advanced technologies in this end-to-end wireless ATM system include: -- a 10-megabit-per-second infrared wireless link between mobiles and PBSs that is capable of low-overhead, single ATM cell transmissions. -- an efficient demand-assignment based MAC protocol called DQRUMA DQRUMA Distributed Queuing Request Update Multiple Access (broadband wireless ATM packet networks) DQRUMA Distributed Queuing Request Updated Multiple Access which provides priority based scheduling in the downlink and uplink directions. -- a data link layer protocol based on an adaptive scheme which implements ATM cell-based forward error correction A communications technique that can correct bad data on the receiving end. Before transmission, the data are processed through an algorithm that adds extra bits for error correction. If the transmitted message is received in error, the correction bits are used to repair it. (FEC See forward error correction. FEC - Forward Error Correction ) using Reed-Solomon coding. -- mobility management software that performs fast location and connection management for mobiles and performs re- routing of connections during handoffs. -- real-time MPEG-2 video viewing and high-speed wireless Internet connectivity for mobile laptops. "It's clear that the world is moving to a Web-based lifestyle and much of our business information is accessed from Web servers today," stated Dick Sillman, Senior Engineering Manager for Technology Development at Sun Microsystems. "Bell Labs has made tremendous progress in the area of high-performance wireless connections to Web servers, which is key to our vision of Web-based handheld video clients. We look forward to demonstrating a complete system concept at the conclusion of the MII project." Bell Labs and Sun Microsystems plan to demonstrate a fully-integrated prototype system at the end of the MII project. Lucent Background Lucent Technologies designs, builds and delivers a wide range of public and private networks, communications systems and software, consumer and business telephone systems and microelectronics components. Lucent Technologies is the market leader in wireless LANs, with installations in over 50 countries. Bell Labs is the research and development arm for the company. For more WaveLAN information visit www.wavelan.com. Lucent Technologies was formed as a result of AT&T's restructuring and became a fully independent company - separate from AT&T - on September 30, 1996. CONTACT: Chris Pfaff Bell Laboratories 908-582-7571 (t) 908-582-4552 (f) cpfaff@lucent.com or Mark Shapiro Davis-Marrin Communications 619-573-0736 (t) 619-573-0232 (f) dmc@cts.com |
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