
	Where results make sense

Topic: ALOHAnet

Related Topics

Packet radio

Aloha protocol

Carrier sense multiple access with collision detection

ARCNET

Asynchronous Transfer Mode

ARPANET

Ethernet

Bob Metcalfe

Throughput

Meagre set

Rubiales

Inuk

DARPA

Hawaii

Stanford Research Institute

	ALOHAnet
		ALOHAnet was a pioneering computer networking system developed at the University of Hawaii[?].
		ALOHAnet instead invented a new solution to the problem, one that has since gone on to become the standard, carrier sense multiple access.
		For ALOHAnet the maximum channel utilisation was around 18%, and any attempts to drive the network over this would simply increase collisions, and the overall data throughput would actually decrease.
	www.ebroadcast.com.au /lookup/encyclopedia/al/ALOHAnet.html (1251 words)

	ALOHAnet / Internet - Internet-description.com
		But while that used ARPANET rented voice grade channels, used the ALOHAnet pack radio with the ARPANET could a knot with several other knots, over lines, communicates, while with the ALOHAnet all used the same radio frequency, with which it became necessary to recognize and treat collisions on this communication medium.
		With the ALOHAnet two radio links were used: a Broadcast channel (413,475 MHz) and a random ACCESS channel (407,350 MHz).
		The ALOHAnet was developed 1970 under the direction of Norman Abramson at the university by Hawaii and taken in the same year in enterprise.
	www.internet-description.com /a/alohanet.html (531 words)

	/. The Island of the Wireless Guerrillas
		ALOHAnet implemented CSMA/CD -- carrier sense, multiple access, collision detect -- to deal with the problems of radios transmitting packets at the same time.
		The Alohanet used radio waves instead of telephone wire to transmit data.
		The main problem with using radio waves as a medium was that if two packets were sent out at the same time on the same broadcast channel they would interfere with each other and effectively cut off the transmission.
	www.xent.com /pipermail/fork/2002-March/009878.html (3132 words)

	C:\BELLBOOK\P001-100\HTMFILES\CSP0441.HTM
		Because of the burst nature of radio transmission of ALOHANET packets, special synchronization techniques must be employed in the modem and data terminal equipment.
		Since the phase-shift-keying used in the ALOHANET modem design is a bit-synchronous technique, bit synchronization must first be performed in the demodulator before packet synchronization can be attempted.
		Packet synchronization is accomplished in the ALOHANET data terminal buffer by means of the 16-bit parity word contained in the packet header.
	research.microsoft.com /~gbell/Computer_Structures_Principles_and_Examples/csp0441.htm (715 words)

	C:\BELLBOOK\P001-100\HTMFILES\CSP0432.HTM
		The lessons learned from the ALOHANET are used to indicate how such a radio packet broadcasting system might best be built using the technology available in 1975.
		In the next section a brief description of the ALOHANET and its rationale is given.
		The ALOHANET is the first system which successfully utilized the packet broadcasting concept for on-line access of a central computer via radio.
	research.microsoft.com /~gbell/Computer_Structures_Principles_and_Examples/csp0432.htm (609 words)

	Gilder Technology
		AlohaNet was a packet radio system used for data communications among the Hawaiian Islands.
		The key feature of AlohaNet was that anyone could send packets to anyone else at any time.
		In Metcalfe’s words, “They were lost in the ether.” At that point, you would simply wait a random period (to avoid a repeat collision as both parties returned to the channel at once).
	www.gilder.com /public/telecosm_series/metcalf.html (744 words)

	ALOHAnet - QuickSeek Encyclopedia (Site not responding. Last check: 2007-09-11)
		ALOHAnet instead utilised a new solution to the problem, one that has since gone on to become the standard, carrier sense multiple access.
		Normally this would mean that the first node to start using the radio would have it for as long as it wanted, which means the other nodes couldn't "get a word in edgewise".
		There is one last problem to consider: if two nodes attempt to start their broadcast at the same time, you'll have the same sorts of problems you would with any other system.
	alohanet.quickseek.com (2013 words)

	Evolution of Wireless Networks
		ALOHANET linked a number of computers and users together with radio.
		It dealt successfully with the issue of packets colliding in an environment where, potentially, any radio could be trying to talk at any given moment.
		ALOHANET's approach to the issue of CDMA (collision detection/multiple access) was the basis for the Ethernet standard, now promulgated in local area networks worldwide.
	www.chips.navy.mil /archives/96_apr/file7.htm (1911 words)

	Testing at Hawaii's ANCL \| InfoWorld \| Test Center \| April 25, 2003 \| By Wayne Rash
		It is the home of AlohaNet — the precursor to Ethernet — and is where the world’s first wired and wireless CSMA (carrier sense multiple access) networks were invented.
		AlohaNet was later confined to wires, carrier detection was added, and the name was changed to Ethernet.
		ANCL is outfitted to test on any medium, including high-grade copper and single- and multimode fiber, and has 125 kilometers of long-link fiber at its disposal.
	www.infoworld.com /archives/emailPrint.jsp?R=printThis&A=/article/03/04/25/17FEtengig-sb-1_1.html (365 words)

	An Introduction to Industrial Ethernet
		ALOHAnet was a wireless data network created to connect together several widely separated computer systems on Hawaiian college campuses (different islands).
		The challenge was to enable several independent data radio nodes to communicate on a peer-to-peer basis without interfering with each other.
		ALOHAnet’s solution was a version of the carrier sense, multiple access with collision detection (CSMA/CD) concept.
	www.bb-elec.com /tech_articles/introduction_to_industrial_ethernet.asp (1939 words)

	Ethernet Networking
		If it didn't get an acknowledgment back for some packets because two radios were broadcasting at the same time, then the missing packets were considered "lost in the ether".
		On average, the network rarely had to retry more than once or twice to get all of the packet to the destination, which was more efficient than trying to implement a complex coordination system to prevent collisions in the first place.
		Metcalfe chose this problem for his computer science thesis, and, as a graduate student at Harvard, showed that you could use mathematical queuing theory to achieve 90% efficiency of the potential traffic capacity without being locked up by the packet collisions.
	www.livinginternet.com /i/iw_ethernet.htm (753 words)

	Bob Metcalfe
		Metcalfe's new dissertation was accepted and he finally got his Ph.D. Vint Cerf talks about the Alohanet.
		Back at Xerox PARC, Metcalfe was given the task of designing a way to connect their new personal computers, the Altos, to each other.
		modified his version of the Alohanet to use cables instead of radio and with several other adjustments created a new technology he called Ethernet.
	www.ibiblio.org /pioneers/metcalfe.html (705 words)

	NMAH \| Ethernet Prototype Circuit Board
		Metcalf based his idea for the Ethernet on the ALOHAnet, a packet-switching wireless radio network developed by Norman Abramson, Frank Kuo, and Richard Binder at the University of Hawaii-Manoa.
		The ALOHAnet sent computer data communication between the university's campuses on several islands.
		Metcalf improved upon ALOHAnet's design and created the “Alto ALOHA Network,” a network of computers hard-wired together by cables that he soon called the Ethernet.
	www.americanhistory.si.edu /collections/object.cfm?key=35&objkey=96 (121 words)

	ALOHANET im Online Lexikon - Ausführliches interaktives Online Lexikon
		Wie das ARPANET wurde das ALOHAnet mit Mitteln der DARPA finanziert.
		Beim ARPANET konnte ein Knoten mit mehreren anderen Knoten, über Leitungen, kommunizieren, während beim ALOHAnet alle die selbe Funk-Frequenz nutzten, womit es notwendig wurde, Kollisionen auf diesem Kommunikationsmedium zu erkennen und zu behandeln.
		Das ALOHAnet wurde 1970 unter der Leitung von Norman Abramson an der Universität von Hawaii entwickelt und im selben Jahr in Betrieb genommen.
	www.lexikon.wikibrowser.de /visilex.php/visi_lexikon_id/150/visilex_key/ALOHAnet (423 words)

	Distinguished Lecture
		The connection oriented service establishes a minimal value of latency for the transmission of packets in a packet network and dedicates a full time channel resource to a transmitter which may require only intermittent use of that resource.
		The ALOHANET, operating at 9600 bits per second throughout the state of Hawaii, went into operation in 1970, providing the first demonstration of the value of packet radio access in a data network.
		Among the innovations demonstrated in the ALOHANET were the first packet radio sensors, the first packet radio repeaters, the first satellite packet network and the first radio access to the Internet.
	www.hicss.hawaii.edu /hicss_31/specpl3.html (943 words)

	Wireless InFidelity I: War Driving
		The concept of ALOHANET spanned many of the core network protocols in use today, including Ethernet and Wireless Fidelity (aka WiFi ®;).
		ALOHANET was the precursor of first generation wireless networks.
		Wireless technologies may be categorized in a variety of ways depending on their function, frequencies, bandwidth, communication protocols involved, and level of sophistication (i.e., 1 st through 3 rd generation wireless systems).
	www.berghel.net /col-edit/digital_village/sep-04/dv_9-04.php (2399 words)

	Nerds 2.0.1 -
		ALOHAnet - Norm Abramson wanted to surf - so he moved to Hawaii in 1969.
		Abramson wanted to network with the other islands - so he built the ALOHAnet in 1970.
		From the University of Hawaii, Abramson connected computers over a network of radio transmitters using a protocol telling the computers how to share the airwaves.
	www.pbs.org /opb/nerds2.0.1/geek_glossary (1680 words)

	Weblog Entry - 03/15/2002: "History Repeats Itself In The Wireless Arena" (Site not responding. Last check: 2007-09-11)
		This "back to the future" concept was actually the basis for one of the most well known technologies today -- Ethernet.
		Bob Metcalfe based his Ph.D. work on improving ALOHAnet, which led him to develop Ethernet [click here for info about Bob].
		Norm Abramson was the engineering professor at the University of Hawaii that developed ALOHAnet [click here for info about Norm].
	www.k2.com /archives/00000029.html (566 words)

	Norm Abramson / Pioneers / WiWiW - WiWiW Project (Site not responding. Last check: 2007-09-11)
		He directed the effort at the University of Hawaii which led to the construction and operation of the ALOHAnet.
		He was the first who came up with the Slotted ALOHA Channel concept.
		We were then the first digital radio network to be “always on” non-dialup and connection free.
	www.wiwiw.org /test/index.php/wiwiw/layout/set/print/pioneers/norm_abramson (1918 words)

	AS Report
		This upstream / downstream categorisation is strictly a description relative topology, and should not be confused with provider / customer / peer inter-AS relationships.
		This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
		Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
	bgp.potaroo.net /cgi-bin/as-report?as=AS3776 (198 words)

	Siemens Communications Lexicon - Alohanet
		Practical implementation of the Aloha method in HF transmissions (the first entity to claim the carrier frequency is permitted to transmit).
		The Alohanet provided packet switched data transmission, where a data packet had a fixed packet length, comprising 32 bits of header information, a 16 bit terminal word in the header information, a payload component of up to 80 bytes, and a 16 bit terminal word.
		Data were transferred across two 100 kHz channels with a transfer rate of 9.6 kbit/s.
	networks.siemens.com /communications/lexicon/5/f004865.htm (152 words)

	The evolution of Ethernet. \| Technology > Computer Networking from AllBusiness.com
		A radio system used for data communications in Hawaii more than 25 years ago, AlohaNet was the technology that inspired a young Robert Metcalfe to devise his own system to allow computers to share information with each other.
		The way the story goes, Metcalfe had been inspired by reading a paper about AlohaNet written by Norman Abramson of the University of Hawaii, who had presented the information at a computer conference in 1970.
		Metcalfe subsequently dreamed up what was to become Ethernet at Xerox's Palo Alto Research Center.
	www.allbusiness.com /technology/computer-networking-broadband/639940-1.html (494 words)

	The Industrial Ethernet Book - Articles: Demystifying IEEE 802.11 for industrial wireless LANs
		It is widely known that the Ethernet MAC (Media Access Control) algorithm originated from AlohaNet at University of Hawaii.
		However, not quite so many people are aware that AlohaNet is also a wireless network operating at a carrier frequency of around 400MHz and was built to connect various islands of Hawaii in the early Seventies.
		The early commercial development of WLAN started in 1990 when AT&T released WaveLAN.
	ethernet.industrial-networking.com /articles/articledisplay.asp?id=225 (1957 words)

	What is Ethernet? - a definition from Whatis.com - see also: Alohanet
		- a definition from Whatis.com - see also: Alohanet
		Specified in a standard, IEEE 802.3, Ethernet was originally developed by Xerox from an earlier specification called Alohanet (for the Palo Alto Research Center Aloha network) and then developed further by Xerox, DEC, and Intel.
		TechTarget provides enterprise IT professionals with the information they need to perform their jobs - from developing strategy, to making cost-effective IT purchase decisions and managing their organizations' IT projects - with its network of technology-specific Web sites, events and magazines.
	whatis.techtarget.com /definition/0,289893,sid9_gci212080,00.html (311 words)

	[No title]
		So my suggestion is that they follow the logs more closely to avoid all too close together song rotations...
		Sun 3-01-92 23:09 (NO KILL) (MAILED) From: Jerry Deguzman To: All Alohanet Sysops Subject: RFH Feedback The RADIO REVOLUTION is now a reality in Alohanet!
		RADIO REVOLUTION is the official Radio Free Hawaii Feedback Echo, and is being bridged to the GT echo of the same name.
	macpro.freeshell.org /rfh/BBS-RFH01.txt (11197 words)

	CHRONOLOGIE GENERALE : hypertexte, Arpanet, Internet
		[Réseaux] Développement du premier réseau radio par paquets, ALOHANET, par Norman Abrahamson, de l’Université d’Hawaii.
		L’un des premiers à partir, pour rejoindre le XEROX Parc, est Bill English, le co-inventeur de la souris.
		- [Réseaux] Publication par Larry Roberts d’une étude sur la technique de transmission satellite par paquets et sur le réseau ALOHANet
	www.uhb.fr /urfist/HistInt/Chronologie1970-1979.htm (3116 words)

Try your search on: Qwika (all wikis)