All Press Releases for June 01, 2005 Wednesday TECH-TIP - "WiMax - WiFi Gets Maxed" Wednesday TECH-TIP - "WiMax - WiFi Gets Maxed" This TECH-Tip tutorial is available at

    /24-7PressRelease/ - Boulder, Colorado, June 01, 2005 - 802.16 WiMax is designed for data rates up to 268 mbps each way with provisions for delivering ATM-Asynchronous Transfer Mode compatible QoS-Quality of Service, Ethernet and other services such as MPLS-Multi-Protocol Label Switching. The 802.16 MAC uses a variable length designed to increase the efficiency of the standard. Multiple MAC PDUs-Packet Data Units may be concatenated (combined) into a single burst to save PHY-PHYsical overhead. Additionally, multiple SDU-Service Data Units for the same service may be concatenated into a single MAC PDU, saving on MAC header overhead. Fragmentation allows very large SDUs to be sent as needed to guarantee the QoS-Quality of Service. Payload header suppression can be used to reduce the overhead caused by the redundant portions of SDU headers.
802.16 can use TDMA-Time Division Multiple Access (shown in the tutorial) where each data packet is assigned a unique time slot, FDMA-Frequency Division Multiple Access for both full duplex (simultaneous two-way) and half-duplex (one direction at a time) or other transmission systems. The IEEE 802.16 Air Interface Standard is designed for fixed broadband wireless access systems employing a PMP-Point-to-MultiPoint architecture for BWA-Broadband Wireless Access systems operating between FCC licensed frequencies 10 and 66 GHz-Giga Hertz and unlicensed unlicensed bands in the 2-11 GHz range.

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