The enterprise segment's growth rebounded slightly from the low single digit growth of the last two quarters, increasing 4.3% over the same period last year. Still, this anemic growth is about half of what the market experienced throughout 2014, and even slower than the year before.

The current deceleration of the annual growth rate, as compared to previous years, is due to the confluence of two factors: a hold on new WLAN projects due to the uncertain short-term trajectory of the global economy and market anticipation of Wave 2 802.11ac products.

The 802.11ac standard continues on its brisk adoption path and now accounts for 57% of dependent access point unit shipments and 72.7% of dependent access point revenues, representing a noticeably faster adoption rate from 802.11n than what we saw with the 802.11a/b/g to 802.11n transition several years ago.

Increased demand on enterprise WLANs will continue to be a driving factor in this transition, especially as new enterprise mobility use cases are adopted and IoT applications move into the mainstream.

Meanwhile, consumer WLAN market revenue increased a solid 16.2% quarter over quarter, although it was still slightly down (-0.4%) on a year-over-year basis in 3Q15. The adoption of the 802.11ac standard in the consumer market has been significantly slower than in the enterprise segment. Currently the 802.11ac standard accounts for just 15.3% of shipments and 36% of revenue.

"The growth seen in 3Q15 is relatively weak compared to 2014 and before, but still represents a positive trend from what we saw in the second quarter of 2015." said Nolan Greene , Research Analyst, Network Infrastructure , at IDC.

"802.11ac continues to be a major story as its penetration continues to increase but this may be offset by enterprises holding out for Wave 2 products that have only just begun to ship. The other big story is E-Rate funding in the US, which is now in process, lifting the market in 3Q15 with promising indicators for 4Q15."

From a geographic perspective, the enterprise WLAN market once again saw its strongest growth rates in Asia/Pacific (excluding Japan)(APxJ), which saw 14% year-over-year growth in 3Q15. Within the APxJ region, China increased 19.8%, India jumped 48.4%, and Korea was up 11.2% year over year. On the other hand, Australia declined -6.2% and Hong Kong -9.5% year over year in 3Q15.

North America grew 4.9% year over year as the market got a boost from the first full quarter of the E-Rate funding streams in K-12 education in the US.

The Europe, Middle East, and Africa (EMEA) region saw a varied performance within its sub-regions in 3Q15. While Western Europe grew 2.3% year over year in 3Q15, Central & Eastern Europe declined -13.3% and Middle East & Africa was down -5.4% in 3Q15. Latin America declined -2.7% in 3Q15 and Japan finished the quarter flat on an annual basis.

"Regional Enterprise WLAN growth varied dramatically in 3Q15," said Petr Jirovsky , Research Manager, Worldwide Networking Trackers. "The softness still being felt in regions like EMEA contrasts greatly with the growth upticks in APxJ and North America."