As more people use wireless networks for streaming movies and video chatting, the limitations of Wi-Fi become increasingly apparent. Transmission speed over wireless networks is heavily impacted, especially for video files, which demand even greater attention to speed. Here is how to improve the speed of wireless video transmission.
I. Beyond the basic 802.11n features for video optimization, we should also consider using other prioritization methods built into network components to enhance video performance. Continuous measurement of wireless video performance is also critical to maintaining video quality. Beyond the basic 802.11n features for video optimization, we should also consider using other prioritization methods built into network components to enhance video performance. After doing so, continuous measurement of wireless video performance becomes crucial to maintaining video quality.
II. Extend Prioritization to the Wired Network. You need to look for Access Points (APs) that support mapping between Wi-Fi Multimedia classes, 802.1p (MAC layer), and Differentiated Services Code Point (or DSCP) IP priority markings.
In addition, you should consider video-aware access points and those capable of applying the correct priority to specific video streams. Since Wi-Fi multicast tends to reduce data transmission rates and increase error rates, you should look for features that optimize multicast video. For example, a video-aware access point can automatically select a higher rate for multicast or convert wired multicast packets to wireless unicast frames.
III. This conversion is very effective, especially when only a few clients are receiving the video; some products can recognize this and continue using multicast when necessary. Other products are actually more sensitive to specific codecs and frame types. This intelligence can be used to adjust access point behavior, thereby reducing the loss of more important frame types or performing transcoding (converting to a more error-tolerant encoding) or video conversion, managing client diversity capabilities.
Generally speaking, client diversity degrades WLAN performance, particularly wireless video performance (especially multicast video). However, many vendors have developed optimization techniques to handle diversity, including transmit beamforming and radio management adjustments.
IV. Through transmit beamforming, the access point customizes transmissions for each client to reduce errors. Radio management algorithms can change the airtime allocated to each device so that newer or faster clients are not dragged down by older or slower ones.
Ideally, these optimization techniques should also be video-aware. Wireless mesh networks can optimize some wireless video applications (such as outdoor wireless cameras and digital signage). While many dual-radio 802.11n access points support wireless mesh networking, be aware that not all access points prioritize and optimize video over wireless backhaul links.
V. In an 802.11n WLAN, signal strength alone does not indicate the quality of wireless video performance. Uplink and downlink data transmission speeds vary due to multipath behavior and differences among access points, clients, and chipsets.
Therefore, the only way to ensure viewer experience is to measure video and multimedia application performance