Open Caching

What if ISP subscribers could stream content from local caches rather than back-hauling from peered networks or over the public Internet?
Now they can.

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Cable and Telecom networks were not designed to carry such large amounts of video traffic. With open caching, operators have a smart alternative to build the network capacity video-hungry subscribers are demanding, by using intelligence instead of endless router expansions.

An open cache caches video and app content locally, and delivers it from the true network edge when requested – without requiring any change of behavior or business logic by content providers, CDNs, or subscribers.

“Nearly every major telco, MSO, and mobile operator is actively looking at or deploying some kind of open caching technology today. It is a required element in their network to control OTT video content consumption and to provide the best possible end-to-end user experience. It is a unique technology that simultaneously benefits a content owner, a network operator, and, most importantly, a broadband or wireless subscriber.”

Dan Rayburn
Streaming Media

Streaming Video Alliance Open Caching

Qwilt is proud to be the chair of the Open Caching Working Group within the Streaming Video Alliance - driving forward the architecture that powers the internet for years to come.

How It Works

Online Video Was Designed to be Cached

Caching eliminates a costly inefficiency


In most service provider networks, over 80% of video volume is typically consumed by only 10% of titles. This means that most of the traffic volume consists of duplicate titles repeatedly traversing the network and causing congestion.


In the past, the only way to increase capacity was by adding more costly infrastructure. But as consumer demand for bandwidth continues to soar, simply adding more routers is no longer a scalable or cost-effective approach.


An intelligent open caching solution can dramatically reduce the volume of repetitive traffic by identifying, storing and delivering the most popular, high-quality video content from inside the service provider network.

Common Problems in Networks without Open Caching


Even when a high percentage of subscribers are watching the same titles, each video has to be delivered directly (over-the-top) from the content provider every time it is requested. The redundant streams exponentially increase the total amount of bandwidth, and results in high transit costs for operators.


Each over-the-top (OTT) video has to traverse the entire network to get to the subscriber. The increased traffic load during peak video consumption hours causes network congestion, which impacts performance and QoS for all services, including video and other latency-sensitive applications.


As video consumption continues to grow and shift from short single-file clips like YouTube, towards full-feature HD titles like Amazon, service providers are forced to heavily invest into costly network infrastructure to continually expand capacity needed to meet the growing bandwidth demand.


Long transit from content sites and network congestion during peak consumption periods result in slower downloads, delays in response, lower bit rates, and subpar experiences for consumers. In a highly competitive industry, consumer QoE is key to subscriber retention.

Key Improvements in Networks with Open Caching


Open caching minimizes the number of times video titles are delivered from the content provider sites, which substantially reduces the total volume of data crossing the transit links. Popular, frequently viewed videos are identified, stored, and delivered to subscribers from within the network.


As the overall volume of OTT video traffic traversing the service provider network decreases, network conditions improve dramatically even during peak consumption periods. This improves performance for all other bandwidth-sensitive non-cacheable network traffic, applications, and services, and non-cached video content.


Operators can achieve substantial CAPEX savings by drastically reducing the amount of infrastructure investment needed to support the rapid growth in bandwidth demand. By leveraging open caching for video delivery, service providers can prepare their networks for the future of online video.


Operators can ensure a quality, immersive experience every time by delivering video from close proximity to the subscriber. With an open caching solution, high quality video is always delivered in the original content provider fidelity, without the pesky disruptions, lengthy download times, and control response delays.

How Much Does Open Caching Improve QoE?

Streaming video content served from Qwilt caches deployed within operator networks was consistently delivered at a higher QoE across all major content provider sites worldwide – with as much as 130% improvement at peak time in some regions. There’s no overlay management software or hardware like traditional networking solutions that you need to deploy on site. It’s all in the cloud.

Solutions Open Caching QOE Chart

Caching and the Video Delivery Ecosystem

Open caching adds tremendous value for all members of the video delivery chain creating a symbiotic ecosystem of network operators, content providers, CDN operators, and subscribers.


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