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arXiv:1704.07015cs.NI

AMSDU vs AMPDU: A Brief Tutorial on WiFi Aggregation Support

Gautam Bhanage

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Abstract

WiFi MAC architecture supports aggregation at two layers. The MAC service data units (MSDUs) can be aggregated to form AMSDUs. Each AMSDU serves as a single MAC protocol data unit (MPDU). Another layer of aggregation is introduced when MPDUs can be packed together to deliver an aggregated MPDU (AMPDU). In this brief tutorial we discuss (1) why aggregation is useful at all, (2) why two layers of aggregation are required, (3) trade-offs for aggregating at different layers.

arXiv comments
3 pages, 3 figures
Journal reference
DOI
Subjects
cs.NINetworking and Internet Architecture

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  1. 40 Milliseconds of latency that just would not go away 1 comment

    • > wifi fragments (used to fragment?) packets 802.11n and 802.11ac both don't do this. In contrast, they have several layers of packet aggregation (AMPDU/AMSDU). [1] Learned about this while troubleshooting latency problems on a noisy 10km point-to-point link. [1]…

      oasisbobView on HNParent context

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