IEEE 802.11n MAC frame aggregation mechanisms for next-generation high-throughput WLANs

TLDR

IEEE 802.11n is an ongoing next‑generation wireless LAN standard that supports a very high‑speed connection with more than 100 Mb/s data throughput measured at the MAC layer. This article investigates the key MAC enhancements that help 802.11n achieve high throughput and high efficiency. A detailed description is given for various frame aggregation mechanisms proposed in the latest 802.11n draft standard. Simulation results confirm that A‑MSDU, A‑MPDU, and their combination substantially improve channel efficiency and data throughput, with two‑level aggregation proving most effective across scenarios.

Abstract

IEEE 802.11n is an ongoing next-generation wireless LAN standard that supports a very highspeed connection with more than 100 Mb/s data throughput measured at the medium access control layer. This article investigates the key MAC enhancements that help 802.11n achieve high throughput and high efficiency. A detailed description is given for various frame aggregation mechanisms proposed in the latest 802.11n draft standard. Our simulation results confirm that A-MSDU, A-MPDU, and a combination of these methods improve extensively the channel efficiency and data throughput. We analyze the performance of each frame aggregation scheme in distinct scenarios, and we conclude that overall, the two-level aggregation is the most efficacious.