Multiple Resource Units (MRU) is a key feature of Wi-Fi 7 that optimizes the use of spectrum by enabling flexible and interference-aware Resource Units (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 (RU). Each RU can be allocated to different devices, allowing multiple devices to transmit or receive data simultaneously within 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 ensures that devices can achieve higher throughput and maintain reliable connections, even in scenarios where 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 interference losses in bandwidth.
The following chart compares the performance of the maximum data rate between Wi-fi 6 and Wi-Fi 7 throughput.
