Adaptive CSMA for Scalable Network Capacity in High-Density WLAN: A Hardware Prototyping Approach


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Source: Intel
Date: January 2008
Type: White Paper
Rating: (0)

Overview: Fast proliferation of 802.11 devices has led to the emergence of High-Density WLAN where 100s-1000s clients being serviced by 10s-100s of APs in a multi-cell environment. This white paper investigates the impact of hidden/exposed terminal and the lack of capture effect on today’s 802.11 devices on network throughput. It is argued that the CSMA/CA parameters in 802.11 MAC protocol need to be adaptive to the changing network topology, traffic and interference. It also proposes a combination of Receiving-Sensitivity adaptation to reduce stronger-last collision and a Clear-Channel-Assessment adaptation to balance the hidden/exposed terminal problems.

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