802.16e also supports multicast and broadcast services. Single Frequency Network operation can be achieved using OFDMA for broadcast/multicast services, enabling very high data rate coverage at cell edge. Rich IP multimedia applications, such as IP TV, that make use of streaming video are greatly advantaged by multicast and broadcast capabilities to better manage bandwidth and content delivery.

Conclusion

Delays in certification and availability of 802.16d products, although they now are available, have significantly closed the gap before the emergence of the first 802.16e products. The first 802.16e products are expected to be available in Q2 2006 and follow with a long line of network and end-user equipment. Additionally, the industry can expect to see a significant base of consumer devices with embedded 802.16e chip sets provided by the major chip set manufacturers.

802.16d has all appearances of being an interim technology with no true upgrade path to 802.16e. Operators should protect their early WiMax investments by selecting products based on the 802.16e standard. In addition to providing mobility for operators seeking to introduce mobile broadband applications, 802.16e will outperform 802.16d and benefit from economies of scale even for fixed applications.