Hello, everyone!
Today, I would like to continue on the WLAN scenarios and challenges relating to high-quality multimedia content delivery.
Our new mobile and portable devices are designed to handle rich multimedia contents, including high-definition video and images. Table 1 reports the requirements in terms of maximum data rate and latency for some of the most common real-time video applications.
Key scenarios in which the support of real-time video transmission is required of course include Internet TV and video streaming.
Table 1: Performance requirements for different HD streaming applications
Similarly, scenarios in which multiple users connect to the same wireless network to request different multi-media content at the same time are increasing every day. However, not all multi-media content is real time.
Stored video and image files can also be exchanged between different devices. Those files can have sizes ranging from a few Megabits to several Gigabits, hence requiring a high network transport capacity in order to provide a good Quality-of-Experience to end users.
Although video encoding schemes exist that offer substantial video compression effciency, such as H.264/MPEG-4, WLANs must be able to achieve very high transmission rates and have content-aware mechanisms that are specifically designed for multi-media applications to ensure a satisfactory service for multimedia delivery.
The reference IEEE 802.11 amendments for high-quality multi-media content delivery are IEEE 802.11aa, IEEE 802.11ac, and IEEE 802.11ax.
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