Academic Research Presentation on WiMAX Technology and its network architecture

1. Wi-MAX – Technology & Architecture
6 3 0 2 – A D VA N C E D W I R E L E S S C O M M U N I C AT I O N
D R . M E Q UA N I N T M O G E S
Presented By:
Syed Ashar Zia

2. Objectives
 What is Wi-MAX?
 Specifications of IEEE 802.16 standard
 Revisions of standard
 Operating frequencies
 MAC & PHY layers
 Data-Rate and throughput
 WiMAX Network Architecture
 Components of the network
 References & Conclusion
By: SYED ASHAR ZIA 3/30/2012

3. Wireless Network Standards
Wireless WAN
Wireless LAN Wireless PAN Wireless MAN – Research
phase
IEEE IEEE IEEE IEEE
802.11 802.15 802.16 802.20
Wireless WiMAX LTE
Fidelity Bluetooth (Worldwide
Interoperability (Long Term
(Wi-Fi) for Microwave Evolution)
Access)
By: SYED ASHAR ZIA 3/30/2012

4. WiMAX Promises
By: SYED ASHAR ZIA 3/30/2012

5. Introduction - WiMAX
By: SYED ASHAR ZIA 3/30/2012

6. Use of WiMAX
Fig: WiMAX Accessibility (Adapted from www.mirentech.co.uk)
By: SYED ASHAR ZIA 3/30/2012

7. Types of Subscribers
By: SYED ASHAR ZIA 3/30/2012

8. Network Speed
 According to the standards, WiMAX can support up to
a 75 Mbps data rate (single channel) and cover up to
30 miles.
 It has a throughput that is much higher than Wi-Fi and
current cellular 2G and 3G networks.
 For a channel size of 20 MHz, WiMAX can support a
sector data rate of about 11 Mbps on the downlink and
1.36 Mbps on the uplink.
By: SYED ASHAR ZIA 3/30/2012

9. Services
 WiMAX supports the Quad-Play Entertainment.
 Quad-Play includes:
 Broadband
 Cable TV
 Landline
 Mobile Phones
 Most commonly provided services with WiMAX are
broadband and VoIP. Cable TV is not offered by most of
the WiMAX Operators.
By: SYED ASHAR ZIA 3/30/2012

10. Operating Frequencies
 10 – 66 GHz frequency ranges are used for LOS
point-to-point links.
 2 to 11 GHz spectrum was introduced for point-to-
multipoint and NLOS links.
By: SYED ASHAR ZIA 3/30/2012

11. Channel Bandwidth
 WiMAX profiles define 4 standard bandwidths which
are 3.5 MHz, 5 MHz, 7 MHz and 10 MHz.
By: SYED ASHAR ZIA 3/30/2012

12. MAC & PHY Layers
 PHY layer:
 SC
 OFDM
 OFDMA
 MAC Layer:
 Security Sub-Layer
 Common Part Sub-Layer
 Convergence Layer
 Convergence layer offers
interoperability among
different types of
networks.
By: SYED ASHAR ZIA 3/30/2012

13. Antenna Systems
 Uses MIMO (Multiple Input and Multiple Output)
antenna systems.
 Adaptive Modulation technique is used based on radio
condition.
 Signals are modulated according to the radio conditions.
 Best Conditions – 64 QAM
 Worst Conditions – BPSK
 Parameters used to diagnose radio conditions are:
 CINR – Carrier to Interference of Noise Ratio (SNR).
 RSSI – Received Signal Strength Indicator.
By: SYED ASHAR ZIA 3/30/2012

14. WiMAX Architecture
Fig: WiMAX Network Architecture (Adapted from www.tutorialspoint.com)
BY: SYED ASHAR ZIA 3/30/2012

15. Subscriber Equipments (SS/MS)
WiMAX Outdoor
CPE
By: SYED ASHAR ZIA 3/30/2012

16. ASN – Access Service Network
By: SYED ASHAR ZIA 3/30/2012

17. Access Service Network (Contd.)
 Three components only:
 EMS – Element Management System
 Base Station or WiMAX Access Point (AP)
 ASN Gateway – Links ASN to CSN
 ASN provides radio connection for the subscriber (MS)
 ASN is responsible of:
 Radio Resource Management.
 Mobility Management.
 Handover control.
 EMS is database used for routing the traffic to desired
server in CSN
By: SYED ASHAR ZIA 3/30/2012

18. CSN – Connectivity Service Network
By: SYED ASHAR ZIA 3/30/2012

19. Connectivity Service Network (Contd.)
 CSN is responsible for subscribers IP connectivity.
 Components in CSN are:
 AAA Server:
 Authentication, Authorization and Accounting.
 Manages CPE authentication.
 Provide the network with profile information of each subscriber.
 DNS Server:
 Domain Name Server.
 Translates the Domain Names into IP Addresses.
By: SYED ASHAR ZIA 3/30/2012

20. Connectivity Service Network (Contd.)
 DHCP Server:
 Dynamic Host Configuration Protocol Server.
 Provides IP to entities in network (including Subscribers)
dynamically.
 DHCP allows IPs to be assigned automatically to the computer.
 Home Agent (HA):
 Special routers that work to provide a data “tunnel”.
 Gateways:
 VoIP and Data gateways for connectivity outside CSN.
By: SYED ASHAR ZIA 3/30/2012

21. NSP – Network Service Provider
By: SYED ASHAR ZIA 3/30/2012

22. Network Service Provider (Contd.)
 NSP network provides all the services and features
which are offered by the carrier/operator.
 Services may include:
 Voice over IP.
 Streaming audio & video programs.
 Internet access.
 E-Mail.
 Instant Messaging.
 Access to databases.
 These services are completely independent of WiMAX
access network.
By: SYED ASHAR ZIA 3/30/2012

23. THE END
Questions?
BY: SYED ASHAR ZIA 3/30/2012

24. BY: SYED ASHAR ZIA 3/30/2012