Technology

Uplink OFDMA is not PCF

In the previous blog, we discussed DL-OFDMA and the 802.11 frame exchanges between an 802.11ax AP and multiple 802.11ax clients for multi-user downlink transmissions. In future blogs, we will discuss the necessary UL-OFDMA frame exchanges to achieve synchronized multi-user uplink transmissions. However, there is already some confusion between UL-OFDMA and some legacy RF medium access methods. […]

How Does DL-OFDMA Work in 802.11ax?

You should always remember that multi-user OFDMA communication is only for 802.11 data frame exchanges between an 802.11ax AP and multiple 802.11ax clients. For backward compatibility, management and control frames will still be sent using single-user OFDM. In a previous blog, we mentioned that a series of frame exchanges are used for both DL-OFDMA and […]

How to Secure IoT Devices with Aerohive A3

Are you struggling with IoT security and device management? Are you still wondering how to secure IoT devices based on all the information you’ve read in the news? Let’s take a closer look at how the next generation Secure Access Management with Aerohive A3 can help IT managers boost network security and control for a […]

What are Cloud Configuration Groups used for?

In an earlier blog, we announced Cloud Configuration Groups, a new HiveManager configuration and network device management feature. Cloud Config Groups is a new form of device classification that adds more flexibility when configuring network policies with HiveManager. Cloud Config Groups solves the management challenge of implementing template-based network policies for network devices that require […]

What are Private Client Groups?

Earlier this year, we discussed Room Area Networking. In the video below, David Coleman and Liwei Wu discuss Private Client Groups. They discuss the use cases, the technology powering it, and why PPSK is so important for it to work. Private Client Groups provides secure, isolated, per-room networks while operating across a single SSID and […]

What are OFDMA Trigger Frames?

In previous blogs, you have learned that an 802.11ax access point uses OFDMA technology to partition a channel into smaller sub-channels called resource units (RUs) so that simultaneous multiple-user transmissions can occur. The AP mandates the RU allocation of a 20 MHz for multiple clients for both downlink and uplink OFDMA. When referencing downlink and uplink OFDMA […]

OFDM and OFDMA Subcarriers – What Are the Differences?

As we continue our 802.11ax blog series, let’s discuss both OFDM and OFDMA technologies used for Wi-Fi communications. 802.11a/g/n/ac radios currently use Orthogonal Frequency Division Multiplexing (OFDM) for single-user transmissions on an 802.11 frequency. 802.11ax radios can utilize Orthogonal frequency-division multiple access (OFDMA) which is a multi-user version of the OFDM digital-modulation technology. OFDMA subdivides a channel […]

How Does an 802.11ax AP Allocate OFDMA Resource Units?

In the previous blog, you learned that 802.11ax access point uses OFDMA technology to partition a channel into smaller sub-channels called resource units (RUs) so that simultaneous multiple-user transmissions can occur. The AP mandates the RU allocation of a 20 MHz for multiple clients for both downlink and uplink OFDMA. RU allocation information is communicated to […]

What are OFDMA Resource Units in 802.11ax?

In our last 802.11ax blog, we discussed how OFDMA is the main 802.11ax enhancement that offers the biggest bang for the buck. Orthogonal frequency-division multiple access (OFDMA) is a multi-user version of OFDM digital-modulation technology. OFDMA subdivides a channel into smaller frequency allocations. By subdividing the channel, parallel transmissions of small frames to multiple clients can […]

Cloud-Managed Branch Routing: Policy-Driven WANs

“Our Tokyo branch just went dark…” “Did you make a configuration change?” “I just updated the router with the same configuration as our Frankfurt office.” Router(config)#help To say enforcing a consistent network and security policy across a multi-branch WAN with traditional routing technologies is a challenge would be an understatement. It’s very easy to mistype […]