Qualcomm Technologies, Inc. pioneered the foundational technologies for modern Wi-Fi mesh networks, and our platforms have powered most commercial systems across multiple generations. With Qualcomm Multi-Link Mesh and Wi-Fi 7, we are raising the bar again for mesh Wi-Fi innovations. 

Home connectivity trends 

Today, mesh total units sold as part of a router system constitute the overwhelming majority of U.S. Wi-Fi router retail sales, with 71% of total units sold being part of a mesh system¹. The preference of mesh Wi-Fi is easy to understand. Today’s families use Wi-Fi to stream everything, make video calls, conduct business meetings, and play their favorite online games in every corner of the home. A single gateway or router might not provide a uniformly strong Wi-Fi signal throughout the home. But trends in home connectivity point to a much broader set of drivers for mesh Wi-Fi popularity.

From smart light bulbs to advanced VR headsets and everything in between, today’s hyper-connected homes have surged to hold an average of 22 connected devices². While all kinds of devices are connected, multi-media and gaming actually drive the most network traffic. In fact, video streaming and online gaming together account for 82% of peak network traffic³. Applications like high-resolution (4K/8K) video streaming and immersive augmented reality/virtual reality are popular with rapid growth forecasted. These applications not only require high throughput, but also low-deterministic latency to guarantee the best possible user experience. 

Wi-Fi mesh fundamentals

Traditional Wi-Fi mesh systems use a dedicated radio to connect devices to mesh nodes — called the fronthaul connection. Meanwhile a separate radio is used to connect the mesh nodes to one another — these are called backhaul connections. Devices sharing the same fronthaul connection, such as mobile phones, smart TVs, and computers will contend for channel access and share available capacity. Slower legacy and/or internet of things (IoT) devices generally consume more airtime for transmissions which has a degrading effect on overall network performance and delay higher speed devices’ connections. 

Why Tri-Band mesh Wi-Fi matters

Tri-band mesh systems unlock significant performance gains by isolating backhaul connections to a dedicated high-speed channel (in either the 5GHz or 6GHz frequency bands), while providing separate channels for slow legacy and IoT devices (in the 2.4 GHz frequency band), as well as high-speed devices (in the 5GHz frequency band), thereby reducing the impact of contention.

Qualcomm Multi-Link Mesh

Building upon Qualcomm Technologies’ mesh networking expertise, Qualcomm Multi-Link Mesh leverages Wi-Fi 7 innovations to introduce a new approach to mesh Wi-Fi. Qualcomm Multi-Link Mesh transforms how backhaul and fronthaul mesh connections are managed, by replacing these dedicated connections with dynamically managed links. Through a process of selecting, aggregating, or alternating links based on network conditions, Qualcomm Multi-Link Mesh ushers in a new era of extremely high throughput and real-time responsiveness, enabling increased performance for both legacy and the newest Wi-Fi 7 connected devices.

• Dynamic link selection: With multiple high-speed channel links available between mesh nodes, traffic scheduling realizes interference avoidance by dynamically selecting transmissions on the lowest latency link. The result is consistent low latency even in changing Wi-Fi network environments. Fast transitions between links are supported because mesh nodes are associated and connected via multiple links and traffic scheduling is accomplished with frame-by-frame granularity.
• Intelligent link assignment: Responding to network conditions, devices are assigned to links that provide the best service. These intelligent connectivity assignments continuously adapt to traffic conditions, effectively providing resilience to interference. This efficient use of spectrum resource increases device performance in terms of latency and throughput, and ensures better quality of experience. 
• Powerful link aggregation: To surge performance and increase network capacity, link aggregation of multiple high-speed channel links provides a throughput boost for the latest high-performance devices.

A new level of performance for mesh systems

Breakthrough Wi-Fi 7 features, designed to surge performance and reduce the effects of interference, are especially powerful in the context of mesh Wi-Fi. With the high number of devices populating today’s homes, and high density of Wi-Fi networks in residential areas driving interference, network jitter and latency increase significantly and are especially problematic when impacting a mesh backhaul connection.

While applications such as web browsing are minimally affected by latency and jitter, real-time applications with interactive content, such as online gaming, are particularly latency-sensitive. Wi-Fi transmissions delayed by interference translate into noticeable lag during gameplay. For bandwidth-intensive video streaming and interactive collaboration applications, packet loss, network latency, and jitter translate into disruptive frame freezing and buffering.

Why Next-Gen Wi-Fi Mesh is Tri-Band 

The importance of tri-band configurations becomes even more evident with Wi-Fi 7 and Multi-Link Mesh, whose advantages are fully realized when making full use of multiple unlicensed wireless spectrum bands. Qualcomm Multi-Link Mesh enables a new generation of deterministic low latency and optimal throughput for virtually lag-free gaming experiences, seamless video streaming and collaboration in today and tomorrow’s highly congested Wi-Fi network environments.

1. The NPD Group/Retail Tracking Service, U.S., Routers, Based on actual unit share, Oct.- Dec. 2022 combined

2. Average U.S. household. Source: Deloitte 2022 Connectivity and mobile trends survey 

3. Comcast 2021 Network report