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In response to growing market demand for higher-performance WLANs, the IEEE-SA approved the creation of 802.11 TGn in 2003. The scope of TGn's objective is to define modifications to the PHY and MAC layers that deliver a minimum of 100 Mb/s throughput at the MAC SAP (see Figure 1). This minimum throughput requirement represents an approximate four-fold increase in WLAN throughput performance compared to today's 802.11a/g networks. TGn's purpose for this next step in WLAN performance is to improve the users experience with existing WLAN applications while enabling new applications and market segments. At the same time, TGn expects a smooth adoption transition by requiring backward compatibility with existing IEEE 802.11a/b/g legacy solutions.

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