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IEEE 802.11 (legacy Mode)
IEEE 802.11 (legacy mode) or more correctly IEEE 802.11-1997 or IEEE 802.11-1999 refer to the original version of the IEEE 802.11 wireless networking standard released in 1997 and clarified in 1999. Most of the protocols described by this early version are rarely used today. Description It specified two raw data rates of 1 and 2 megabits per second (Mbit/s) to be transmitted via infrared (IR) signals or by either frequency hopping or direct-sequence spread spectrum (DSSS) in the Industrial Scientific Medical frequency band at 2.4 GHz. IR remained a part of the standard until IEEE 802.11-2016, but was never implemented. The original standard also defines carrier sense 0 access with collision avoidance (CSMA/CA) as the medium access method. A significant percentage of the available raw channel capacity is sacrificed (via the CSMA/CA mechanisms) in order to improve the reliability of data transmissions under diverse and adverse environmental conditions. IEEE 802.11-1999 also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IEEE 802
IEEE 802 is a family of Institute of Electrical and Electronics Engineers (IEEE) standards for local area networks (LAN), personal area network (PAN), and metropolitan area networks (MAN). The IEEE 802 LAN/MAN Standards Committee (LMSC) maintains these standards. The IEEE 802 family of standards has had twenty-four members, numbered 802.1 through 802.24, with a working group of the LMSC devoted to each. However, not all of these working groups are currently active. The IEEE 802 standards are restricted to computer networks carrying variable-size packets, unlike cell relay networks, for example, in which data is transmitted in short, uniformly sized units called cells. Isochronous signal networks, in which data is transmitted as a steady stream of octets, or groups of octets, at regular time intervals, are also outside the scope of the IEEE 802 standards. The number 802 has no significance: it was simply the next number in the sequence that the IEEE used for standards projects. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TU (time Unit)
A time unit (TU) is a unit of time equal to 1024 microseconds. It was originally introduced in IEEE 802.11-1999 standard{{cite book , title=A Field Guide to Wireless LANs: For Administrators and Power Users , first=Thomas , last=Maufer , date=2004 , publisher=Prentice Hall Professional , work=The Radia Perlman Series in Computer Networking and Security Series , isbn=9780131014060 , id=0131014064 , page=144 , url=https://books.google.com/books?id=GB-87qyhc8sC&pg=PA142 , access-date=2015-10-27 and continues to be used in newer issues of the IEEE 802.11 standard. A whole number of such units are used to describe several intervals in that standard. The use of the term is to avoid using the term "millisecond", which is about 2.4% shorter. The unit allows for maintaining intervals that are easy to implement in hardware that has a 1 MHz clock (by dividing the clock signal in half ten times, rather than operating a phase-locked loop or digital divider to divide such a clock ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OpenAir (communications Standard)
The Wireless LAN Interoperability Forum (WLIF) was a non-profit industry organization founded in 1996 to promote and certify wireless LAN products. It was active from about 1996 through 1998 and disbanded in 2001. History The organization was announced on May 20, 1996, chaired by Chris Gladwin of Zenith Data Systems. It first based its technology on the RangeLAN2 products licensed by Proxim Wireless, which were originally developed around 1994. The RangeLAN2 name was later changed to OpenAir, and IEEE 802.11 standards were later mentioned, although the Wi-Fi Alliance controlled the trademark for those protocols. In 1998 Mike Jones of Intermec Technologies was its chairman and its membership included: AMP (now part of Tyco Electronics), Citadel, Cruise Technologies, Data General, Fujitsu Personal Systems, Hand Held Products, Hewlett-Packard, IBM, IDWare, Intermec Technologies, Kansai, Kinetic Computer, LXE, MaxTech, Mitsubishi Electronics America, Monarch Marketing Systems (sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proxim Wireless
Proxim Wireless Corporation is a San Jose, California-based company that builds scalable broadband wireless networking systems for communities, enterprises, governments, and service providers. It offers wireless LAN, point-to-multipoint and point-to-point products through a channel network. The company is a product of many mergers and acquisitions over the years. History Proxim Corporation was founded in 1984, initially headquartered in Mountain View, California. Starting in 1989, it began to develop radio frequency modules using spread spectrum technology. Its first commercial product in 1990 used 900 MHz frequency bands. End-user products called RangeLAN were introduced in 1991 and 1992, reflecting their use as network interface controllers for local area networks (LANs). The first adapter using the Industry Standard Architecture bus and supported Novell NetWare. An initial public offering (IPO) on December 15, 1993 listed the company shares on NASDAQ under symbol PROX. In 1994 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symbol Technologies
Symbol Technologies is an American manufacturer and supplier of mobile data capture and delivery equipment. The company specializes in barcode scanners, mobile computers, RFID systems and Wireless LAN infrastructure. In 2014, Symbol Technologies became a subsidiary of Zebra Technologies, and is headquartered in Holtsville, New York, on Long Island. History Before 2000 The company was co-founded in 1973 by Jerome Swartz and physicist Shelley A. Harrison. At that time, the company focused on handheld laser based scanning of bar codes. Under Swartz, the company marketed handheld laser bar code scanning devices. The company focused heavily on the retail industry and began to get involved in inventory management. These activities typically required people to scan items where they are stored and as such needed to be mobile. Symbol began to make small computers that could store data scanned to take inventory counts remotely and then upload the information gathered to a host sys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lucent
Lucent Technologies, Inc. was an American Multinational corporation, multinational telecommunications equipment company headquartered in Murray Hill, New Jersey, Murray Hill, New Jersey. It was established on September 30, 1996, through the divestiture of the former AT&T Technologies business unit of AT&T Corporation, which included Western Electric and Bell Labs. Lucent was merged with Alcatel SA of France on December 1, 2006, forming Alcatel-Lucent. Alcatel-Lucent was absorbed by Nokia in January 2016. Name Lucent means "light-bearing" in Latin (language), Latin. The name was applied for in 1996 at the time of the split from AT&T. The name was widely criticised, as the logo was to be, both internally and externally. Corporate communications and business cards included the strapline 'Bell Labs Innovations' in a bid to retain the prestige of the internationally famous research lab, within a new business under an as-yet unknown name. This same linguistic root also gives Lucife ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BreezeCom
Alvarion Technologies is a global provider of autonomous Wi-Fi networks designed with self-organizing capabilities for carrier-grade Wi-Fi, enterprise connectivity, smart city planning, smart hospitality, connected campuses, and connected events. History Alvarion was originally incorporated as BreezeCOM Ltd. in September 1992. In March 2000, BreezeCOM had an initial public offering, selling 5 million shares of its common stock at a price of $20 per share. BreezeCOM's shares were listed on the NASDAQ under the symbol BRZE. In August 2001, BreezeCOM merged with another Israeli company, Floware Wireless Systems Ltd. (NASDAQ: FLRE), which was founded in 1993, changing its name to Alvarion. In April 2003, Alvarion acquired InnoWave ECI Wireless Systems Ltd, from ECI Telecom. In July 2003, Alvarion signed a strategic partnership agreement with Intel to co-develop WiMAX based Broadband wireless access systems, using Intel's WiMAX chips. In December 2004, Alvarion acquired interWAVE ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alvarion
Alvarion Technologies is a global provider of autonomous Wi-Fi networks designed with self-organizing capabilities for carrier-grade Wi-Fi, enterprise connectivity, smart city planning, smart hospitality, connected campuses, and connected events. History Alvarion was originally incorporated as BreezeCOM Ltd. in September 1992. In March 2000, BreezeCOM had an initial public offering, selling 5 million shares of its common stock at a price of $20 per share. BreezeCOM's shares were listed on the NASDAQ under the symbol BRZE. In August 2001, BreezeCOM merged with another Israeli company, Floware Wireless Systems Ltd. (NASDAQ: FLRE), which was founded in 1993, changing its name to Alvarion. In April 2003, Alvarion acquired InnoWave ECI Wireless Systems Ltd, from ECI Telecom. In July 2003, Alvarion signed a strategic partnership agreement with Intel to co-develop WiMAX based Broadband wireless access systems, using Intel's WiMAX chips. In December 2004, Alvarion acquired interWAV ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prentice Hall Professional
Prentice Hall was an American major educational publisher owned by Savvas Learning Company. Prentice Hall publishes print and digital content for the 6–12 and higher-education market, and distributes its technical titles through the Safari Books Online e-reference service. History On October 13, 1913, law professor Charles Gerstenberg and his student Richard Ettinger founded Prentice Hall. Gerstenberg and Ettinger took their mothers' maiden names, Prentice and Hall, to name their new company. Prentice Hall became known as a publisher of trade books by authors such as Norman Vincent Peale; elementary, secondary, and college textbooks; loose-leaf information services; and professional books. Prentice Hall acquired the training provider Deltak in 1979. Prentice Hall was acquired by Gulf+Western in 1984, and became part of that company's publishing division Simon & Schuster. S&S sold several Prentice Hall subsidiaries: Deltak and Resource Systems were sold to National Education ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carrier Sense 0 Access With Collision Avoidance
Carrier may refer to: Entertainment * ''Carrier'' (album), a 2013 album by The Dodos * ''Carrier'' (board game), a South Pacific World War II board game * ''Carrier'' (TV series), a ten-part documentary miniseries that aired on PBS in April 2008 * ''Carrier'' (video game), a 2000 video game for the Sega Dreamcast * ''Carriers'' (film), a 2009 post-apocalyptic horror film * The Carrier (band), an American melodic hardcore band * The Carrier, spaceship home to the Authority, a team of comic superheroes Science * Carrier is a diluent used to simplify radioanalytical separations. * Carrier protein, a protein that facilitates the transport of another molecule * Genetic carrier, an organism that has inherited a genetic trait or mutation * Asymptomatic carrier, an organism infected with an infectious disease agent Technology * Aircraft carrier, a warship primarily hosting fixed-wing aircraft * Carrier recovery in telecommunications * Carrier signal, a waveform suitable for modulati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wireless Network
A wireless network is a computer network that uses wireless data connections between network nodes. Wireless networking is a method by which homes, telecommunications networks and business installations avoid the costly process of introducing cables into a building, or as a connection between various equipment locations. Admin telecommunications networks are generally implemented and administered using radio communication. This implementation takes place at the physical level (layer) of the OSI model network structure. Examples of wireless networks include cell phone networks, wireless local area networks (WLANs), wireless sensor networks, satellite communication networks, and terrestrial microwave networks. History Wireless networks The first professional wireless network was developed under the brand ALOHAnet in 1969 at the University of Hawaii and became operational in June 1971. The first commercial wireless network was the WaveLAN product family, developed by NCR i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carrier Sense 0 Access
Carrier may refer to: Entertainment * ''Carrier'' (album), a 2013 album by The Dodos * ''Carrier'' (board game), a South Pacific World War II board game * ''Carrier'' (TV series), a ten-part documentary miniseries that aired on PBS in April 2008 * ''Carrier'' (video game), a 2000 video game for the Sega Dreamcast * ''Carriers'' (film), a 2009 post-apocalyptic horror film * The Carrier (band), an American melodic hardcore band * The Carrier, spaceship home to the Authority, a team of comic superheroes Science * Carrier is a diluent used to simplify radioanalytical separations. * Carrier protein, a protein that facilitates the transport of another molecule * Genetic carrier, an organism that has inherited a genetic trait or mutation * Asymptomatic carrier, an organism infected with an infectious disease agent Technology * Aircraft carrier, a warship primarily hosting fixed-wing aircraft * Carrier recovery in telecommunications * Carrier signal, a waveform suitable for modulati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
