1. IEEE &

2. Agenda IEEE and IEEE Standards 802.16 Benefits of 802.16
Problems associated with vs
802.15
Problems associated with
Conclusion

3. IEEE Institute of Electrical and Electronics Engineers
International, Non-profit organization
Leading standards-making organizations in industries like IT, healthcare, telecommunications, IS etc.

4. IEEE Standards 802.1 LAN/MAN bridging, remote MAC bridging 802.2
Logical Link control standards for connectivity
802.3
Ethernet standards for CSMA/CD
802.4
Standards for token passing bus access
802.5
Standards for token rings & LAN/MAN comm.
802.6
Standards for information exchange
802.7
Broadband LAN cabling
802.8
Fiber Optic connection
802.9
For services like voice and data

5. IEEE Standards (contd..)
802.10
For LAN/MAN security implementations
802.11
WiFi-Wireless Networking
802.12
Standards for demand priority access methods
802.14
For cable television broadband communications
Bluetooth
Wireless Sensor/Control Networks: Zigbee
802.16
Wireless Networking: WiMAX

8. Problems with
IEEE does not take into account changes in the predetermined frequency channel. In case of interferences, switching to another channel is not possible
Not well-suited to applications with larger distance between nodes
Can accommodate 7 or more nodes and has a short range of 10 meters

9. Problems with
Cannot operate well in high interference environments

10. 802.16 Aims at deploying broadband Wireless Metropolitan Area Networks
Approved in Dec 2001
Entry of broadband wireless access to link homes and businesses worldwide
Wireless MAN provides network access to buildings by using exterior antennas

12. 802.16 (contd..) Network access through cables is no longer required
802.16: delivers broadband wireless transmission in the frequency range: GHz
802.16a: 2-11 GHz
Lower frequency range helps reach more people and cost less

13. (contd..)
802.16: Line of sight only, 10-66GHz, Point-to-Multipoint applications
802.16a: Non Line of sight, 2-11GHz, Point-to-Multipoint applications. Base stations directly connect to the customer
802.16c: Line of sight communication,
10-66GHz. Can be used in backhaul networks to connect a BS with high-speed links over long distances

14. (contd..)

15. How it works?

16. How it works? (contd..)
provides communication path between the subscriber site and the core network
It has a three-layered architecture

17. How it works? (contd..)
Physical Layer: lowest layer, deals with error correction, synchronization, modulation and frequency. DAMA-TDMA technique is used for transmission from subscribers  base station
MAC Layer: layer above Physical layer, associated with in what manner and when a station will initiate transmission

18. How it works? (contd..)
Convergence Layer: for providing functions specific to the service such as ATM, internet

19. Benefits
Services can be deployed faster even where wires cannot be reached
Reliable & Scalable
Single station is capable of serving hundreds of users
Wireless systems can span large geographical areas and are not expensive as cable links are not required

20. Benefits (contd..)
Efficient even when there are multiple connections per terminal
Provides QoS (Quality of Service) mechanisms

21. 802.16 : Amendments 802.16e-2005: Mobile 802.16
802.16f-2005: Management Information Base
802.16g-2007: Management Plane Procedures and Services
802.16k-2007: Bridging of

22. Problems
Difficult to determine each and every physical location for accurate placement of the equipment
As a result, Deployment costs might increase
Operational costs are high too
Needs strong electrical support-higher costs and power consumption

23. Problems (contd..)
Weather conditions such as rain can interfere with reception
Limitation of bandwidth: In high density areas, bandwidth may not be sufficient to meet the needs of all the users-high costs
Costs associated with setting up wireless network since the frequency used is licensed by the government

24. &
802.15
802.16
Bluetooth Group
Wireless Personal Area Networks (PAN)
derives a Wireless PAN standard based on bluetooth specifications
emphasizes on low cost communication of nearby devices. Simple battery operated devices as sensors
Wireless MAN
Addresses point to multipoint communications
Less costs as compared to DSL or cable modem access
10-66GHz for c and
2-11GHz for a

25. 802.16 & 802.11 802.16 802.11 WiMAX License is required
Performs well when there are large number of users
Range: can go upto 50km
Wi-Fi
No license required by govt.
Has performance limitations with large number of users
Range: optimized for 100m

26. &
802.16
802.11
QoS: Guaranteed mechanisms to provide QoS
802.16a: 2-11GHz
802.16c: 10-66GHz
Security: WEP, WPA, WPA2
QoS: No guarantee for delays, throughput
Operates in the 5GHz and 2.4GHz bands
Security: 128-bit 3 DES, 1024-bit RSA

27. Conclusion
Both and have their own advantages and disadvantages. While has high installation costs, is not expensive and doesn’t need licensing is used for devices like bluetooth, home security and is Wireless MAN’s. To conclude, they both have different transmission range, rate and work in different situations

28. References http://en.wikipedia.org/wiki/IEEE

29. References (contd..)

30. References (contd..)

31. Thank You !