WiMAX uses OFDM and smart antennas to improve performance. It provides QoS and improved security. The architecture includes mobile stations, base stations, an access service network gateway for traffic aggregation, and a connectivity service network for internet/network access. WiMAX antennas can be omnidirectional, sectoral, or panel designs. The protocol layers include the control, management, and data planes. OFDMA dynamically allocates bandwidth across frequency channels. While HSPA focuses on cellular mobility and data/voice, WiMAX provides broadband data through a new infrastructure.

1. WiMAX (802.16)(Worldwide Interoperability for Microwave Access)Raheem Muftau

2. WiMAX gets its improved performance through its physical layer technology which is OFDM and through the use smart antennas. WiMAX provides QoS and improved security.Wireless Networks Wimax Presentation3/7/2011

3. IP Based WiMAX ArchitectureMS- Mobile StationsBS- Base Station (Provides air interface to MS)ASNGW- Layer 2 traffic aggregation point within an ASNCSN- provides connectivity to the Internet, ASP, other public networks, and corporate networks.Wireless Networks Wimax Presentation3/7/2011

4. WiMAX ANTENNASOmnidirectionalused for point-to-multipoint configurations and main drawback to an omni directional antenna is that its energy is greatly diffused in broad-casting 360 degrees.Sectorfocuses the beam in a more focused area and offers greater range and throughput with less energy.PanelPanel antennas are usually a flat panel of about one foot square. They can also be a configuration where potentially the WiMAX radio is contained in the square antenna enclosure with a power source of PoEWireless Networks Wimax Presentation3/7/2011

5. WiMAX LAYERSThe CPS provides functions related to duplexing and channelization, channel access, PDU framing, network entry and initializationControl Plane for admission control, resource control, congestion and load balancingManagement Plane for traffic engineering, monitoringData Plane For Transport of Information.Wireless Networks Wimax Presentation3/7/2011

6. OFDMA/Dynamic Bandwidth AllocationOFDM divides up the spectrum into Channels and uses an appropriate data rate for the conditions on that Channel.Mobile Wimax(802.16e) uses OFDMA technique that allowsmultiplexing in both time and frequencywherebychannels are divided into groups and users are allocatedslots in time for one or more of thesegroups of channels.Wireless Networks Wimax Presentation3/7/2011

7. WiMAX and HSPAHSDPA is about mobility and data and voice from a cellular platform, whereas WiMAXis about broadband data to the enterprise and coverage infill.HSDPA does not require any new infrastructure as it only requires a software upgrade. WiMAX, on the other hand needs a whole new infrastructure to be built which will be time consuming and very expensive.Wireless Networks Wimax Presentation3/7/2011