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The wireless local area network standard IEEE 802.11 is the preferred solution for low-cost data services. Key to its success are the 2.4 and 5 GHz unlicensed bands. The transmit power limitations imposed due to regulatory requirements limit the range (coverage) that can be achieved by WLANs in these bands. However, the demand for "Larger" wireless infrastructure is emerging, ranging from office/university campuses to city-wide deployments. To overcome the limitations of single-hop communication, data packets need to traverse over multiple wireless hops, and wireless mesh networks are called for. Since 2004 task group s has been developing an amendment to the 802.11 standard to exactly address the aforementioned need for multi-hop communication.
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