| 单词 | WiMAX (Worldwide Interoperability for Microwave Access) |
| 释义 | WiMAX (Worldwide Interoperability for Microwave Access) A broadband wireless access (BWA) solution based on the standards recommendations from the IEEE 802.16 Working Group and the European Telecommunications Standards Institute (ETSI) HiperMAN group. WiMAX is promoted by the WiMAX Forum, a special interest group with members from the manufacturing, carrier, service provider, and consulting communities.Where line of sight (LOS) can be achieved, the WiMAX cell radius is as much as 50 kilometers (31 miles). Under non-line of sight (NLOS) conditions, the maximum cell radius is approximately 9 kilometers (5.6 miles). WiMAX standards provide for aggregate raw bandwidth up to about 70 Mbps per base station (BS), although the throughput is much less due to overhead, as well as issues of LOS, link distance, air quality, electromagnetic interference (EMI), radio frequency interference (RFI), and other signal impairments. Mobile network deployments described in 802.16e are expected to provide up to 15 Mbps of aggregate raw bandwidth within a cell radius of up to 3 kilometers. WiMAX supports a maximum signaling rate of 70 Mbps and the maximum throughput of approximately 40 Mbps 74570c23.qxd 9/11/07 12:37 PM Page 540 |
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