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Intel® Wi-Fi Products
TechNote: Access Point interoperability issue with uAPSD

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This tech note is intended for customers that are experiencing lower than expected performance with their wireless adapter.

Issue
Intel has identified IOT (interoperability) issues with certain access points that results in reduced Rx data throughput. When exercising uAPSD, the access point stops doing aggregations on the downlink, resulting in reduced Rx data throughput:

  • 11n 20MHz channel, about 30 Mbps instead of up to 100 Mbps.
  • 11n 40MHz channel, about 60 Mbps instead of up to 200 Mbps.

When the uAPSD feature is disabled, the power savings are not realized. There is no other impact. The power savings revert to the level of a non-uAPSD-capable access point.

Scope

uAPSD is implemented for these Intel wireless adapters, starting with the Intel® PROSet/Wireless Software and Drivers version 16.6:

  • Intel® Dual Band Wireless-AC 7265.
  • Intel® Dual Band Wireless-N 7265.
  • Intel® Wireless-N 7265.
  • Intel® Dual Band Wireless-AC 7260.
  • Intel® Dual Band Wireless-AC 7260 for Desktop.
  • Intel® Dual Band Wireless-N 7260.
  • Intel® Wireless-N 7260.

Access Points exhibiting the reduced Rx data throughput are:

  • TP-Link* TL-WA801N.
  • NetGear* 3700.

Mitigation
uAPSD enable/disable is a user selection in the Adapter Properties GUI of Intel® PROSet/Wireless Software and Drivers version v17.0.2 (or newer). The latest version of Intel® PROSet/Wireless Software and Drivers are available on the Intel Customer Support download center site.




Frequently asked questions

Click (+) or the questions to expand the content:

What is uAPSD?

Other than the two access points listed, are there other access points that exhibit the issue?

Is there any other impact other than reduced Rx data throughput?

Is the Intel® Dual Band Wireless-AC 3160 adapter affected?

Related topic
What are advanced Wi-Fi adapter settings?

This applies to:

Intel® Dual Band Wireless-AC 3160
Intel® Dual Band Wireless-AC 7260
Intel® Dual Band Wireless-AC 7260 for Desktop
Intel® Dual Band Wireless-AC 7265
Intel® Dual Band Wireless-N 7260
Intel® Dual Band Wireless-N 7265
Intel® Wireless-N 7265

Solution ID: CS-034875
Last Modified: 20-Aug-2014
Date Created: 21-Jul-2014
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