6302 – ADVANCED WIRELESS COMMUNICATION DR. MEQUANINT MOGES Wi-MAX – Technology & Architecture Presented By: Syed Ashar Zia
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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 ND R . M E Q UA N I N T M O G E S
Wi-MAX – Technology & Architecture
Presented By:
Syed Ashar Zia
04/09/2023By: SYED ASHAR ZIA
Objectives
What is Wi-MAX?Specifications of IEEE 802.16 standardRevisions of standardOperating frequenciesMAC & PHY layersData-Rate and throughputWiMAX Network ArchitectureComponents of the networkReferences & Conclusion
04/09/2023By: SYED ASHAR ZIA
Wireless Network Standards
Wireless LAN
IEEE 802.11
Wireless Fidelity (Wi-Fi)
Wireless PAN
IEEE 802.15
Bluetooth
Wireless MAN
IEEE 802.16
WiMAX(Worldwide
Interoperability for Microwave Access)
Wireless WAN – Research
phase
IEEE 802.20
LTE(Long Term Evolution)
04/09/2023By: SYED ASHAR ZIA
WiMAX Promises
WiMAX
High Speed
Wide Area
Coverage
High Quality
High Capacity
04/09/2023By: SYED ASHAR ZIA
Introduction - WiMAX
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Use of WiMAX
Fig: WiMAX Accessibility (Adapted from www.mirentech.co.uk)
04/09/2023By: SYED ASHAR ZIA
Types of Subscribers
04/09/2023By: SYED ASHAR ZIA
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.
04/09/2023By: SYED ASHAR ZIA
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.
04/09/2023By: SYED ASHAR ZIA
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.
04/09/2023By: SYED ASHAR ZIA
Channel Bandwidth
WiMAX profiles define 4 standard bandwidths which are 3.5 MHz, 5 MHz, 7 MHz and 10 MHz.
04/09/2023By: SYED ASHAR ZIA
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.
04/09/2023By: SYED ASHAR ZIA
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.
04/09/2023BY: SYED ASHAR ZIA
WiMAX Architecture
Fig: WiMAX Network Architecture (Adapted from www.tutorialspoint.com)
04/09/2023By: SYED ASHAR ZIA
Subscriber Equipments (SS/MS)
WiMAX Outdoor CPE
04/09/2023By: SYED ASHAR ZIA
ASN – Access Service Network
04/09/2023By: SYED ASHAR ZIA
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
04/09/2023By: SYED ASHAR ZIA
CSN – Connectivity Service Network
04/09/2023By: SYED ASHAR ZIA
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.
04/09/2023By: SYED ASHAR ZIA
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.
04/09/2023By: SYED ASHAR ZIA
NSP – Network Service Provider
04/09/2023By: SYED ASHAR ZIA
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.
04/09/2023BY: SYED ASHAR ZIA
THE END
Questions?
04/09/2023BY: SYED ASHAR ZIA
THANK YOU
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