Editor’s Note: This is the second of a four-part deep dive series into High Density Experience (HDX), Cisco’s latest solution suite designed for high density environments and next-generation wireless technologies. For more on Cisco HDX, visit www.cisco.com/go/80211ac. Read part 1here.
With any new technology comes a new set of obstacles to overcome. 802.11ac is no exception. Last week we talked about CleanAir for 802.11ac and why spectrum intelligence still matters. Another challenge is scalability. In this post I will give you some details on new HDX feature, Turbo Performance, which allows the AP 3700 overcome common scaling issues to scale amazingly well.
What’s Different with 802.11ac?
802.11ac means higher data rates, which means more packets per second (PPS). There are three reasons for more PPS with 11ac: wider channels, increased modulation and increased aggregation. Channel width doubled to 80 MHz, modulation increased from 64 QAM to 256 QAM, and aggregation increased from 64k to 1MB!
With 802.11n, an AP might have had to push 30,000 1500 byte packets per second through the APs data plane. Today with 802.11ac that could now be 75,000+ PPS. More PPS means more load on the APs CPU, so to really keep up with the demands of 802.11ac, we needed to go back to the drawing board. Read More »
The addition of online streaming content has helped KSCU 103.3, Santa Clara University’s non-profit, volunteer run radio station, tremendously. Before the radio station had this technology our listenership was limited to however far our radio signal would go, which is, give or take 30 miles in any direction.
Now with advances in technology we are able to deliver our content to anyone in the world at any time. Currently, a big portion of our listeners use our online audio stream (computer, smart phone, etc.) and because of that we are able to bring local content to a much bigger scale now.
As we contemplate the arrival of 4th-Generation mobile wireless capabilities in the form of the LTE standard, I’m going to take us back in time to reflect on an unlikely and intriguing true story from the archives of radio communication history.
Most of us in the telecom industry know that there has been something of a spirited competition that’s been going on for some time between two very capable wireless technologies — CDMA and GSM.
GSM is far more widely deployed than CDMA – the former is widely considered to be a de facto global standard. Whereas CDMA is mostly limited to the U.S. and Canada, along with a few deployments in Asia. Both mobile radio standards are used to establish and manage the wireless connection between a mobile device and the nearest cell tower.