Depending on the type of interferer, its frequency profile, signal strength and location to the Wi-Fi communication devices, up to 100% of the WLAN network throughput can be lost due to this interference.
With users looking to deploy latency-sensitive applications such as voice over their Wi-Fi networks, better RF interference management solutions are needed. Latency sensitive devices can suffer performance loss from RF interference even when the average throughput is sufficient to support the throughput requirements. Even though voice calls require relatively little bandwidth, their latency and jitter requirements to support adequate call quality require solutions beyond higher throughput. Quality of Service (QoS) standards support can help prioritize voice packets over video and data packets, but they are based on a Layer 2 mechanisms and do not help when the packets are delayed or blocked by RF interference.
With the AirMaestro Spectrum Analysis technology, Bandspeed has redefined the architecture for RF interference classification solutions allowing it to be cost-effectively embedded in edge network devices. Traditional solutions capture RF spectral information from the environment and provide this information to network processors or centralized server CPUs for feature extraction and signal analysis (see figures below). The AirMaestro Embedded Signal Analyzer has an embedded classification engine that moves classification to the edge of the device/network. This fundamental architectural change provides advanced interference monitoring and management, while requiring little from the network device CPU/memory or the local area network to which the device is connected.
The AirMaestro Embedded Signal Analyzer is a purpose-built integrated circuit (IC) with a firmware-based classification engine supporting hardware-accelerated interference classification. A time-domain analyzer and a frequency-domain analyzer are both integrated into the IC, allowing for more accurate interference classification that is not possible if only FFT/frequency-domain information is available. While some WLAN ICs can provide some FFT/frequency-domain information, using the WLAN ICs to capture this information across the frequency band requires the WLAN interface to be taken out of service. This is disruptive to the network and the users. As a dedicated RF sensor with its own dedicated radio, the AirMaestro Embedded Signal Analyzer scans the RF environment independent of the WLAN ICs providing WLAN access.