WiMAX - 802.16. WiMAX (Worldwide Interoperability for Microwave Access) is a wireless communications standard designed to provide 30 to 40 megabit-per-second data rates,[1] with the 2011 update providing up to 1 Gbit/s[1] for fixed stations. The name "WiMAX" was created by the WiMAX Forum, which was formed in June 2001 to promote conformity and interoperability of the standard. The forum describes WiMAX as "a standards-based technology enabling the delivery of last mile wireless broadband access as an alternative to cable and DSL".[2] Terminology[edit] WiMAX refers to interoperable implementations of the IEEE 802.16 family of wireless-networks standards ratified by the WiMAX Forum.
(Similarly, Wi-Fi, refers to interoperable implementations of the IEEE 802.11 Wireless LAN standards certified by the Wi-Fi Alliance.) The original IEEE 802.16 standard (now called "Fixed WiMAX") was published in 2001. Uses[edit] The bandwidth and range of WiMAX make it suitable for the following potential applications: Backhaul (telecommunications) In a hierarchical telecommunications network the backhaul portion of the network comprises the intermediate links between the core network, or backbone network and the small subnetworks at the "edge" of the entire hierarchical network.
In contracts pertaining to such networks, backhaul is the obligation to carry packets to and from that global network. A non-technical business definition of backhaul is the commercial wholesale bandwidth provider who offers Quality of service (QOS) guarantees to the retailer. It appears most often in telecommunications trade literature in this sense, whereby the backhaul connection is defined not technically but by who operates and manages it, and who takes legal responsibility for the connection or uptime to the Internet or 3G/4G network. See also hotspot contracts below. Other examples include: Backhaul capacity can also be leased from another network operator, in which case that other network operator generally selects the technology.
Horizon Quantum - DragonWave. Delivering from 2 to 4 Gbps per link, Horizon Quantum represents the next generation in packet microwave technology and sets a new benchmark for performance. With dual-channel capability, this split-mount system is a step change in spectral efficiency, capacity, nodal intelligence, and operational simplicity; all while occupying only half a rack unit and consuming the lowest power per bit of any solution today.
In addition, the Horizon Quantum’s integrated switching means that it can provide aggregation and restoration in a single unit. With this level of performance – in a packet microwave system that is remarkably simple to install and operate – operators can now avoid the high cost and long delays associated with fiber deployments, yet achieve the capacity and reliability they require for all of their future applications and services. Solution Highlights: Proxim - WISP Backhal Products. Purchase WISP Equipment. IEEE 802.11a/b/g/n Digital WiFi Standard. IEEE 802.11n-2009, commonly shortened to 802.11n, is a wireless networking standard that uses multiple antennas to increase data rates. It is an amendment to the IEEE 802.11-2007 wireless networking standard.
Its purpose is to improve network throughput over the two previous standards—802.11a and 802.11g—with a significant increase in the maximum net data rate from 54 Mbit/s to 600 Mbit/s (slightly higher gross bit rate including for example error-correction codes, and slightly lower maximum throughput) with the use of four spatial streams at a channel width of 40 MHz.[1][2] 802.11n standardized support for multiple-input multiple-output and frame aggregation, and security improvements, among other features. It can be used in the 2.4 GHz or 5 GHz frequency bands. 802.11 is a set of IEEE standards that govern wireless networking transmission methods.
Description[edit] Data encoding[edit] Number of antennas[edit] The 802.11n draft allows up to 4 x 4 : 4. Data rates[edit] Wi-Fi Alliance[edit] Wireless Broadband, Point To Point, Multipoint Wireless & Networking Solutions. Buy | Ruckus Wireless. Ruckus Wirless 802.11n article. Ruckus Wireless is now offering a comprehensive 802.11n system for wireless carriers. The new Ruckus Mobile Internet products include a new outdoor Smart-Sector mesh access point (ZoneFlex 7762-S), a point-to-multipoint wireless backhaul bridge (ZoneFlex 7731), indoor/outdoor customer premises equipment (MediaFlex 7200 series), and system-wide remote Wi-Fi management (FlexMaster 9.0) proven to manage tens of thousands of Smart Wi-Fi network elements and hundreds of thousands of Wi-Fi clients. These products are targeted at carriers looking to: reduce subscriber churn by bundling Wi-Fi services,offload best effort wireless data traffic from expensive cellular networks,offer value added services such as Wi-Fi wholesaling and managed enterprise wireless LANs ,provide last-mile wireless broadband access where fixed line or macro-cellular based wireless service is not viable, andaugment backhaul capabilities with a low cost, low power Wi-Fi alternative.
Product Pricing and Availability. Cisco Aironet.
Long Range Wi-Fi, WiMAX, LTE and broadband news. Long-range Wi-Fi (802.11) Long-range Wi-Fi is used for low-cost, unregulated point-to-point computer network connections, as an alternative to other fixed wireless, cellular networks or satellite Internet access. Introduction[edit] Since the development of the IEEE 802.11 radio standard (marketed under the Wi-Fi brand name), the technology has become markedly less expensive and achieved higher bit rates. Long-range Wi-Fi especially in the 2.4 GHz band (as the shorter-range higher-bit-rate 5.8 GHz bands become popular alternatives to wired LAN connections) have proliferated with specialist devices.
While Wi-Fi hotspots are ubiquitous in urban areas, some rural areas use more powerful longer-range transceivers as alternatives to cell (GSM, CDMA) or fixed wireless (Motorola Canopy and other 900 MHz) applications. The main drawbacks of 2.4 GHz vs. these lower-frequency options are: Despite a lack of commercial service providers, applications for long-range Wi-Fi have cropped up around the world. Applications[edit] Line-of-sight propagation. Line-of-sight propagation refers to electro-magnetic radiation or acoustic wave propagation. Electromagnetic transmission includes light emissions traveling in a straight line. The rays or waves may be diffracted, refracted, reflected, or absorbed by atmosphere and obstructions with material and generally cannot travel over the horizon or behind obstacles. Line of sight propagation to an antenna However, at higher frequencies and in lower levels of the atmosphere, neither of these effects are significant. Thus any obstruction between the transmitting antenna and the receiving antenna will block the signal, just like the light that the eye may sense.
Therefore, since the ability to visually see a transmitting antenna (disregarding the limitations of the eye's resolution) roughly corresponds to the ability to receive a radio signal from it, the propagation characteristic of high-frequency radio is called "line-of-sight". Radio horizon[edit] Earth bulge and atmosphere effect[edit] AlphiMAX Home - Solutions For A Wirless World.
Link Possibility Calculator. How To: Wireless Video Surveilance (municiple perk) This is not a how-to article on setting up a home video surveillance network since even my neighbor, the non-technical guy, installed his own video surveillance system. Most of us have an understanding of how an IP-based video surveillance network works. What we want to cover is why all this phenomenal bandwidth we are creating takes video surveillance to another level and why that may or may not be a good thing — and how to apply this to a large scale city video surveillance network.
A long time ago, video surveillance cameras used terms such as CIF (352×288 pixel resolution) and 4CIF (702×576). Computers used resolutions like VGA (640×480) and SVGA (1024×768). The common denominator in all pf these is the 4×3 screen ratio. With the convergence of computers and video, it was obvious that compression methodology needed to be applied because of the limits of CD-ROMs and bandwidth. So how does this relate to wireless? The biggest issue is how do you use all that video quality. . (1) Budget. Homebrew antenna shootout. The Shootout My plan was to get relative performance measurements for various designs (including mine) of homebrew antennas for 802.11b (WiFi) wireless networks. To do this, I setup a wireless link and changed only the antenna- recording each antennas' performance under identical conditions. I didn't compare them to a commercial directional antenna as my only one has a male connector and I don't have the right cable to hook it up yet.
The contestants were (click on each for design specifications). The Performance Summary The results surprised me! In our test, the Flickenger Pringles can did a little better than my modified Pringles design. Both did no better than the Lucent omnidirectional. Now this is just on raw signal strength, noise rejection due to directivity still makes a directional antenna a better choice for some uses even if there is no gain benefit.
Of the waveguides, the Nalley's "Big Chunk" took top marks. Copyright 2003-2007 Gregory Rehm - All rights reserved. 304km with RouterOS + XR5 + handmade antenna. Homebrew WISP ( Wireless ISP) Materials Needed:Plastic Transhcan - used as enclosureAccess PointHomebrew POE Injector and AntennaPower Supply Regulator a. Fitting the Access Point and Supply Regulator Using a plywood, cut the desired size so that it will fit inside the trashcan. The wood will be used as the base for your AP and the Power Supply Regulator. Look at picture #2 and #3,It would look like this after putting the AP and the Regulator.
Directory. Wireless Network Design , Engineering and Mapping Services. WISP%20National%20Map. Spectrum Dashboard - Reboot.FCC.gov. Home About Reboot Events Initiatives Reform FCC Leadership Blog FCC.gov/data Exploring America's Spectrum The Spectrum Dashboard allows new ways for citizens to search spectrum in the United States. Browse Spectrum Bands Learn more about the current spectrum distribution by browsing a chart of the spectrum bands, or by searching specific frequency ranges. API Resources for Developers Browse Using a Map Use an interactive map to find information on licensees in a particular county or state. Search by Name Search by "common name" (AT&T, Verizon, etc) to learn who holds spectrum licenses around the country. Advanced Search Search by name, radio service, frequency range, channel block, or call sign to learn who holds spectrum licenses around the country.
FCC License View A single portal for information on the management of FCC licenses. Spectrum Dashboard Reports 1-click access to commonly requested data and popular reports. Feedback and Discussions Help Understanding Your Results Online Help Latest from the Blog. High Speed Internet - Nebraska, Wyoming.