Multiple Resource Units (MRU) is a feature of Wi-Fi 7 that optimizes spectrum use by enabling flexible, interference-aware RU allocation.
With the introduction of Orthogonal Frequency-Division Multiple Access (OFDMA) in Wi-Fi 6, the available channel bandwidth is divided into smaller units called Resource Units (RU). Each RU can be allocated to multiple devices, allowing them to transmit or receive data simultaneously on the same channel. This improves spectral efficiency and reduces latency compared to traditional single-user transmissions. Wi-Fi 7 builds on this concept by introducing MRUs, allowing devices to use combinations of RUs within a channel for greater flexibility and performance. MRU enhances the network's ability to deliver high throughput, low latency, and consistent performance.
Preamble Puncturing helps devices to utilize portions of a wide channel by puncturing or excluding the parts of the channel that are affected by interference, while still transmitting over the remaining interference-free portions. Preamble Puncturing enables devices to achieve higher throughput and maintain reliable connections, even when the entire channel cannot be used. This feature is particularly valuable in congested or crowded environments. With MRU and Preamble puncturing, Wi-Fi 7 devices can reduce bandwidth interference losses.
The following chart compares the performance of the maximum data rate between Wi-fi 6 and Wi-Fi 7 throughput.
