WIFI AND WIMAX What is WiFi WiFi or

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WI-FI AND WIMAX

WI-FI AND WIMAX

What is Wi-Fi • Wi-Fi or Wireless Fidelity is a trademark of the Wi-Fi

What is Wi-Fi • Wi-Fi or Wireless Fidelity is a trademark of the Wi-Fi Alliance for certified products • based on the IEEE 802. 11 standards. • The term Wi-Fi is often used by the public as a synonym for wireless LAN (WLAN) • Wi-Fi is supported by most personal computer operating systems, many game consoles, laptops, smartphones, printers, and other peripherals.

What is Wimax Wi. MAX, Worldwide Interoperability for Microwave Access • is a telecommunications

What is Wimax Wi. MAX, Worldwide Interoperability for Microwave Access • is a telecommunications technology that provides wireless transmission of data • uses a variety of transmission modes, from point-to-multipoint links to portable and fully mobile internet access. • The technology provides up to 3 Mbit/s broadband speed without the need for cables. • The technology is based on the IEEE 802. 16 standard • also called Broadband Wireless Access

Wi-Fi system details • Wi-Fi uses both single carrier direct-sequence spread spectrum radio technology

Wi-Fi system details • Wi-Fi uses both single carrier direct-sequence spread spectrum radio technology and multicarrier OFDM (Orthogonal Frequency Division Multiplexing) radio technology • The regulations for unlicensed spread spectrum enabled the development of Wi-Fi • Unlicensed spread spectrum was first made available in the US by the Federal Communications Commission in 1985

Wi-Fi system advantages • Wi-Fi allows low-cost local area networks (LANs) to be deployed

Wi-Fi system advantages • Wi-Fi allows low-cost local area networks (LANs) to be deployed without wires for client devices • The price of chipsets for Wi-Fi continues to drop • Wi-Fi has become widespread in corporate infrastructures. • Unlike mobile telephones, any standard Wi-Fi device will work anywhere in the world. • Wi-Fi is widely available in more than 220, 000 public hotspots and tens of millions of homes and corporate and university campuses worldwide

Wi-Fi system challenges • Spectrum assignments and operational limitations are not consistent worldwide •

Wi-Fi system challenges • Spectrum assignments and operational limitations are not consistent worldwide • Wi-Fi networks have limited range. A typical Wi. Fi home router using 802. 11 b or 802. 11 g has a range of 32 m (120 ft) indoors and 95 m (300 ft) outdoors. • High power consumption of Wi-Fi makes lower battery life mobile devices.

Wi-Fi system devices • A wireless access point (WAP) connects a group of wireless

Wi-Fi system devices • A wireless access point (WAP) connects a group of wireless devices to an adjacent wired LAN. • Wireless adapters allow devices to connect to a wireless network, such as PCI, mini. PCI, USB, Express. Card, PC card. • A wireless router allows wired and wireless Ethernet LAN devices to connect to a (usually) single WAN device such as cable modem or DSL modem • Wireless network bridges connect a wired network to a wireless network such as between two separate homes.

OSBRi. DGE 3 GN - 802. 11 n Access Point and UMTS/GSM Gateway

OSBRi. DGE 3 GN - 802. 11 n Access Point and UMTS/GSM Gateway

USB wireless adapter

USB wireless adapter

Embedded serial-to-Wi-Fi module

Embedded serial-to-Wi-Fi module

City Wide Wi-Fi • Many cities around the world announced plans for a city

City Wide Wi-Fi • Many cities around the world announced plans for a city wide Wi-Fi network • most of these projects were either canceled or placed on indefinite hold. • A few were successful, for example in 2005, Sunnyvale, California became the first city in the United States to offer city wide free Wi-Fi

Wi-Fi system uses • A Wi-Fi enabled device such as a PC, game console,

Wi-Fi system uses • A Wi-Fi enabled device such as a PC, game console, mobile phone, MP 3 player or PDA can connect to the Internet • Wi-Fi can make access publicly available at Wi-Fi hotspots provided either free of charge or to subscribers to various providers. • There already more than 300 metropolitanwide Wi-Fi projects in progress • Wi-Fi enables wireless voice-applications (Vo. WLAN or WVOIP).

Wi-Fi channel congestion • Usage of the ISM band in the 2. 45 GHz

Wi-Fi channel congestion • Usage of the ISM band in the 2. 45 GHz range is also common to Bluetooth, Zig. Bee • Problem in high-density areas, such as large apartment complexes or office buildings with many Wi-Fi access points • Additionally, other devices such as microwave ovens, security cameras, Bluetooth devices cordless phones and baby monitors can interfere • Solution is to is migrate to a Wi-Fi 5 GHz product, (802. 11 a, or the newer 802. 11 n if it has 5 GHz support)

Wi-Fi Alliance • The Alliance aims to improving the interoperability of wireless local area

Wi-Fi Alliance • The Alliance aims to improving the interoperability of wireless local area network products based on the IEEE 802. 11 standards. • The Wi-Fi Alliance is a consortium of separate and independent companies • The Alliance have a set of common interoperable products based on the family of IEEE 802. 11 standards • The Wi-Fi Alliance certifies products via a set of defined test-procedures

Wi. MAX Applications • Connecting Wi-Fi hotspots to the Internet. • Providing a wireless

Wi. MAX Applications • Connecting Wi-Fi hotspots to the Internet. • Providing a wireless alternative to cable and DSL for broadband access. • Providing data and telecommunications services. • Providing a source of Internet connectivity as part of a business continuity plan. • Providing portable connectivity.

Wi. MAX Technical details • Wi. MAX is a term coined to describe standard,

Wi. MAX Technical details • Wi. MAX is a term coined to describe standard, interoperable implementations of IEEE 802. 16 wireless networks • Wi-Fi is used for interoperable implementations of the IEEE 802. 11 Wireless LAN standard. • However, Wi. MAX is very different from Wi-Fi in the way it works.

Wi. MAX Physical layer • The original Wi. MAX is based in the 10

Wi. MAX Physical layer • The original Wi. MAX is based in the 10 to 66 GHz range. • 802. 16 a, updated in 2004 to 802. 16 -2004, added specifications for the 2 to 11 GHz range. • 802. 16 -2004 was updated by 802. 16 e-2005 in 2005 • More advanced versions, including 802. 16 e, also bring Multiple Antenna Support through MIMO (Multiple input-Multiple output)

Wi. MAX MIMO board

Wi. MAX MIMO board

Wi. MAX integration with IP • The Wi. MAX Forum has proposed a Wi.

Wi. MAX integration with IP • The Wi. MAX Forum has proposed a Wi. MAX network can be connected with an IP based core network • Typically chosen by operators that serve as Internet Service Providers (ISP) • Nevertheless the Wi. MAX BS provide seamless integration capabilities with other types of architectures as with packet switched Mobile Networks.

Wi. MAX frequency allocation • Wi. MAX could function on any frequency below 66

Wi. MAX frequency allocation • Wi. MAX could function on any frequency below 66 GHz • Wi. MAX Forum has published three licensed spectrum profiles: 2. 3 GHz, 2. 5 GHz and 3. 5 GHz • In the USA it is 2. 5 GHz primarily to Sprint Nextel and Clearwire. • Some countries in Asia like India and Indonesia will use a mix of 2. 5 GHz, 3. 3 GHz and other frequencies • Pakistan's Wateen Telecom uses 3. 5 GHz.

Wi. MAX Silicon design • A critical requirement for the success of a new

Wi. MAX Silicon design • A critical requirement for the success of a new technology is the availability of low-cost chipsets and silicon implementations. • Intel Corporation is a leader in promoting Wi. MAX, and has developed its own chipset. • Texas Instruments, Design. Art, and pico. Chip are focused on Wi. MAX chip sets for base stations. • Kaben Wireless Silicon is a provider of RF frontend and semiconductor IP for Wi. MAX applications.

Wi. MAX Compared with Wi-Fi • Wi. MAX uses 802. 16 standards provide different

Wi. MAX Compared with Wi-Fi • Wi. MAX uses 802. 16 standards provide different types of access, from portable (similar to a cordless phone) to fixed (an alternative to wired access, where the end user's wireless termination point is fixed in location. ) • Wi-Fi uses unlicensed spectrum to provide access to a network. • Wi. MAX and Wi-Fi have quite different Quality of Service (Qo. S) mechanisms.