1. WiMAX (802.16e)“Worldwide Interoperability Of Microwave Access” A Road to Mobile Life BY: AtulKumar R.n-18(cs-A) SOE ,CUSAT

2. “WiMAX-we belive it’s the next big thing in the wireless boardband arena” By:- President of WiMAX group and intel manager[wallstjournal,america]

3. What is Wimax ? WiMAX is a telecommunications protocol that provides fixed and fully mobile internet access. The current WiMAX revision provides up to 40 Mbit/s with the IEEE 802.16m update expected offer up to 1 Gbit/s fixed speeds.

4. Some Wireless Standards Bluetooth DECT (Digital Enhanced Cordless Telecommunications) DSRC (Dedicated Short Range Communications) HIPERLAN HIPERMAN IEEE 802.11 IrDA RFID (Radio Frequency Identification) WiFi WiMAX xMax ZigBee

6. Original fixed wireless broadband air Interface for 10 – 66 GHz: Line-of-sight only, Point-to-Multi-Point applications

9. INTERNET BACKBONE HOW WiMAX WORK ISP Network WiMAX 802.10 transmitter Non Line Of Sight Transmitter HOME LOCAL AREA NETWORK

10. TECHNICAL ASPECTS

11. Applications of 802.16 Standards

12. 802.16 Network Architecture

13. Physical Layer Summary

14. Wireless Performance(as of 2003)

17. OFDM Basics Orthogonal Subcarriers Cyclic Prefix in Frequency Domain Cyclic Prefix in Time Domain

18. Equalizers are avoided in OFDM Narrow bandwidth  long symbol times  all significant multipaths arrive within a symbol time minimizing ISI  no equalization  low complexity Note: All signals & multipath over a useful symbol time are from the same symbol & add constructively (no ISI) Tx Signal Rx Signal time Cyclic Prefix Useful Symbol Time time Note: dashed lines represent multipath

20. Time Division Duplexing (TDD)

21. Connections 802.16/WiMAX is connection oriented For each direction, a connection identified with a 16 bit CID Each CID is associated with a Service Flow ID (SFID) that determines the QoS parameters for that CID

22. PDU Transmission Source: R. Marks (NIST) IEEE Presentation

23. Advanced 802.16 Features Multiple Input and Multiple Output (MIMO) MIMO channel capacity is given by C = B log2 det(I + SNR.HH*T/N) where H is MxN channel matrix with M and N are receive and transmit antennas, resp. Hybrid-ARQ For faster ARQ, combines error correction and detection and makes use of previously received versions of a frame Adaptive Antenna System (AAS) Enables directed beams between BS and SSs

24. WiBro (Wireless Broadband) WiBro is an early large-scale deployment of 802.16 in South Korea (Dec 2005) Demonstrates 802.16 performance as compared to 3G/4G cellular alternatives 3 operators have been licensed by the government (each spending ~$1B)

25. APPLICATION Cellular backhaul Boardband on-demand Residential boardband Underserverd area Best connection service

26. Benefits Cost and Investment risk: Goes where cable and fiber cannot: Throughput Scalability Coverage Quality of service Security interoperability

27. Conclusion WiMAX is not the technology of future; it is already something that being implemented in many area around globe. A good example being WiBRO which is an 802.16 implementation in south korea. WiMAX aim to make entire cities wireless