1 / 23

Fixed WiMAX

Fixed WiMAX. By, Shah Ankur Vasant. WiMAX. WIMAX stands for Worldwide Interoperability for Microwave Access The original IEEE 802.16 standard (now called "Fixed WiMAX") was published in 2001 . WiMAX adopted some of its technology from WiBro , a service marketed in Korea

reina
Télécharger la présentation

Fixed WiMAX

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Fixed WiMAX By, Shah Ankur Vasant

  2. WiMAX • WIMAX stands for Worldwide Interoperability for Microwave Access • The original IEEE 802.16 standard (now called "Fixed WiMAX") was published in 2001. • WiMAX adopted some of its technology from WiBro, a service marketed in Korea • Its a communication technology for wirelessly delivering high-speed Internet service to large geographical areas • Geographical Area Coverage: 30 miles • Bandwidth: 75 Mbps • Frequency bands- 2 to 11 and 10 to 66 Ghz(licensed and unlicensed bands respectively) • Defines both MAC and PHY layer

  3. WiMax Over Wi-Fi • Coverage Area: • Below 100m for Wi-Fi • Scalability • Supports around 10 users • Bitrate: • 54 Mbps in 20 Mhz Channels • Cost • For Laying Cables throughout.

  4. 802.16 Standards

  5. Types Of WiMAX • Wireless access can be divided into three classes • Stationary • Pedestrian • Vehicular • 802.16 Standards is classified into two types of usage models • Fixed WiMAX • Mobile WiMAX

  6. IEEE 802.16-2004 • Current Standard for using fixed WiMax • 3.5 GHz and 5.8 GHz frequency bands • Frequency division duplexing (FDD) • Time division duplexing (TDD) • IEEE 802.16e - 2005 • extension to the 802.16-2004 • supports mobile communications • 2.3 and 2.5 GHz frequency bands.

  7. A WIMAX system consists of • WiMAX Base Station (BS) • Base Station is similar to a cellphone tower and Covers A radius of 30miles(3000 SqFt) • WiMAX receiver (WiMAX CPE) • Customer Premise Equipment • Receiver could be a small box or PCMCIA card, or they could be built into a laptop

  8. Fixed WiMAX

  9. WiMAX Network Architecture • P2P Point to Point • P2MP Point to Multi Point • Mesh Network

  10. P2P and P2MP

  11. Mesh

  12. Modes Of Operation • Non-Line-Of-Sight : • WiFi sort of service, where a small antenna on your computer connects to the tower • uses a lower frequency range -- 2 GHz to 11 GHz • Lower-wavelength transmissions are not as easily disrupted by physical obstructions -- they are better able to diffract or bend around obstacles. • Line-Of-Sight : • fixed dish antenna points straight at the WiMAX tower from a rooftop or pole • stronger and more stable • Allows to send a lot of data with fewer errors • Uses High Frequencies, ranges reaching 66 Mhz • Less Interference and More Bandwidth

  13. Protocol Layers Of WiMAX 802.16 Protocol Architecture has 4 layers: Convergence, MAC, Transmission and physical, which can be map to two OSI lowest layers: physical and data link • OSI Physical Layer • OSI Data Link Layer

  14. Protocol Architecture • MAC Protocol: Convergence sub-layer: • Handle the higher-layer protocols Common part sub-layer: • Channel access, connection establishment and maintenance & QoS Security sub-layer: • Authentication, secure key exchange and encryption • Physical and transmission layer functions: • Encoding/decoding of signals • Preamble generation/removal • Bit transmission/reception

  15. Physical Layer Features: • Frequency Band • Channel Bandwidth • MIMO • FDD/TDD • Signal Modulation: Data Link Layer Features: • access protocol, • security and • session establishment functions.

  16. WiMAX PHY Frame

  17. Features Of WiMAX • Scalability • Quality of Service • Range • Coverage

  18. Advantages of WiMAX • Faster than broadband service • No need to lay cables thus reducing cost • Easier to extend to Sub-Urban and rural areas • Much Wider coverage • Can use licensed spectrum • Provides data, telecommunication services and portability.

  19. Disadvantages • Lack of Quality • Low bit rate over Long distance • Speed of connectivity • Sharing of bandwidth • WiMax over Wi-Fi • Expensive network • Bad Weather • Power consuming

  20. QUESTIONS ??

More Related