This document discusses WiMAX (Worldwide Interoperability for Microwave Access), a wireless technology that provides broadband connections over long distances. It operates using towers and receivers. WiMAX works by transmitting signals from towers that can cover large areas, up to 50 km. Receivers pick up the signal and can be internal cards or external boxes. The document outlines key features of WiMAX including scalability to support thousands of users, quality of service guarantees, long ranges of up to 50 km, and broad coverage areas supported by its tower infrastructure. Advantages over WiFi are also discussed such as better performance, quality of service, range, coverage, and security. Potential future uses of WiMAX include providing fixed wireless connections initially, then

1. WIMAX
PRESENTED BY-
SHAKIL MUHAMMAD
UET PESHAWAR

2. Contents
 Introduction
 Working of WIMAX
 Features of WIMAX
 Advantages of WIMAX over WIFI
 Future of WIMAX

3. What is WIMAX?
 WIMAX stands for Worldwide Interoperability for Microwave Access
 WiMAX refers to broadband wireless networks that are based on the
IEEE 802.16 standard, which ensures compatibility and interoperability
between broadband wireless access equipment
 primarily aimed
 To get rid of expense of stringing wires (as in cable-access broadband)
 and the distance limitations of Digital Subscriber Line
 Wide availability of network access

4. NEW TECHNOLOGY
 Broadband access is too expensive and WiFi coverage is very sparse.
 The new technology promises
 High speed of broadband service
 Wireless rather than wired access
 Broad Coverage

5. 1) A WiMAX tower- similar in concept to a cell-phone tower
.it transmits signals and gives coverage to a very large area
2) A WiMAX receiver - The receiver and antenna could be a
small box or Personal Computer Memory card, or they
could be built into a laptop the way WiFi access is.
A WIMAX system consists of

6. WIMAX TOWER WIMAX RECEIVER

7. HOW WIMAX works?

8. WIMAX CHIPS

9. FEATURES OF WIMAX
 Scalability
 Quality of Service
 Range
 Coverage

10. Scalability
 The 802.16 standard supports flexible radio frequency (RF) channel
bandwidths.
 The standard supports hundreds or even thousands of users within
one RF channel
 As the number of subscribers grow , the spectrum can be
reallocated with process of sectoring.

11. Quality of Service
 Primary purpose of QoS feature is to define transmission ordering
and scheduling on the air interface
 These features often need to work in conjunction with mechanisms
beyond the air interface in order to provide end to end QoS or to
police the behaviour.

12. RANGE
 Optimized for up to 50 Km
 Designed to handle many users spread out over kilometres
 Designed to tolerate greater multi-path delay spread
(signal reflections) up to 10.0μ seconds

13. Coverage
 Standard supports mesh network topology
 Optimized for outdoor performance
 Standard supports advanced antenna techniques

14. BENEFITS OF WIMAX
 Speed
 Faster than broadband service
 Wireless
Not having to lay cables reduces cost
Easier to extend
 Broad Coverage
Much wider coverage than WiFi hotspots

15. Benefits to Customers
 DSL-like services at DSL prices but with portability
 Rapidly declining fixed broadband prices
 No more DSL “installation” fees from incumbent

16. Why not WIFI
 Scalability
 Relative Performance
 Quality of Service
 Range
 Coverage
 Security

17. Scalability
• Channel bandwidths can be
chosen by operator (e.g. for
sectorization)
• designed to support thousands
of users.
• Wide (20MHz) frequency
channels
• designed to support 10’s of
users
WIMAXWIFI

18. 5.0 bps/Hz100 Mbps1.5 – 20 MHzWIMAX
2.7 bps/Hz54 Mbps20 MHzWIFI
Maximum
bps/Hz
Maximum
Data Rate
Channel
Bandwidth
RELATIVE PERFORMANCE

19. Quality of Service
• Designed to support Voice and
Video from ground up
• Supports differentiated service
levels: e.g. T1 for business
customers; best effort for
residential.
• Standard cannot currently
guarantee latency for Voice, Video
• Standard does not allow for
differentiated levels of service on a
per-user basis
•
WIMAXWIFI

20. Range
• Optimized for up to 50 Km
• Designed to handle many users
spread out over kilometers
• Designed to tolerate greater
multi-path delay spread (signal
reflections) up to 10.0μ seconds
• Optimized for ~100 meters
• No “near-far” compensation
• Designed to handle indoor multi-
path delay spread of 0.8μ seconds
WIMAXWIFI

21. Coverage
• Optimized for outdoor
performance
• Standard supports mesh network
topology
• Standard supports advanced
antenna techniques
• Optimized for indoor
performance
• No mesh topology support within
ratified standards
WIMAXWIFI

22. USES OF WIMAX

23. FUTURE
 WiMax will be deployed in three stages
 In the first phase provides fixed wireless connections
 In the second phase WiMaX will be available as a cheap and self-
installing Subscriber Terminal (ST), linked to PC and to antenna
 The third phase enables portability, thus WiMAX will be
integrated into commercial laptops

24. Any question?