--- title: Congestion Control Algorithms Are Not Fair « ipSpace.net... description: An MIT research group analyzed delay-bounding TCP congestion control algorithms (CCAs) and found that most result in unfair bandwidth distribution across... canonical: https://daily.dev/posts/congestion-control-algorithms-are-not-fair-ipspace-net-blog-cejypwdxy twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Congestion Control Algorithms Are Not Fair « ipSpace.net blog | daily.dev og:description: An MIT research group analyzed delay-bounding TCP congestion control algorithms (CCAs) and found that most result in unfair bandwidth distribution across... og:url: https://daily.dev/posts/congestion-control-algorithms-are-not-fair-ipspace-net-blog-cejypwdxy og:image: https://api.daily.dev/og/posts/cEJYPWDxY.png og:image:alt: Congestion Control Algorithms Are Not Fair « ipSpace.net blog og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Congestion Control Algorithms Are Not Fair « ipSpace.net blog **[ipSpace.net Blog](https://daily.dev/sources/ipspace)** · 1 min read · 0 upvotes · 0 comments ## Summary An MIT research group analyzed delay-bounding TCP congestion control algorithms (CCAs) and found that most result in unfair bandwidth distribution across parallel flows in real-world scenarios. Their paper provides a rigorous proof that all delay-bounding, delay-convergent CCAs must suffer from such fairness problems, suggesting that QoS remains an unsolved challenge. The discussion also touches on the limitations of queuing theory models due to unrealistic assumptions and overly complex variable sets. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### What did MIT researchers find about delay-bounding TCP congestion control algorithms and fairness? MIT researchers proved that all delay-bounding, delay-convergent congestion control algorithms (CCAs) must suffer from unfair bandwidth distribution across parallel flows. Their paper provides a detailed model and rigorous proof showing this is not a fixable implementation issue but a fundamental property of the algorithm class. The unfairness manifests in real-world scenarios that deviate from idealized network conditions. _Network engineers tracking TCP and QoS research find these kinds of findings discussed on daily.dev._ ## Similar posts on daily.dev - [Queueing Requests Queues Your Capacity Problems, Too](https://daily.dev/posts/queueing-requests-queues-your-capacity-problems-too-14qp4hjbt) · Programming Digest · 4 upvotes · 0 comments - [Why Queues Don’t Fix Overload \(And What To Do Instead\)](https://daily.dev/posts/why-queues-don-t-fix-overload-and-what-to-do-instead--z9coej1wx) · P99 Conf · 0 upvotes · 0 comments - [Simulating TCP loss and congestion in browser using Go/WASM](https://daily.dev/posts/simulating-tcp-loss-and-congestion-in-browser-using-go-wasm-tbtw78geg) · Hacker News · 0 upvotes · 0 comments --- Tags: [#distributed-systems](https://daily.dev/tags/distributed-systems) [View this post on daily.dev](https://daily.dev/posts/congestion-control-algorithms-are-not-fair-ipspace-net-blog-cejypwdxy) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Congestion Control Algorithms Are Not Fair « ipSpace.net blog","url":"https://daily.dev/posts/congestion-control-algorithms-are-not-fair-ipspace-net-blog-cejypwdxy","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/congestion-control-algorithms-are-not-fair-ipspace-net-blog-cejypwdxy"},"datePublished":"2026-08-11T08:56:07.688Z","dateModified":"2026-08-11T09:27:13.144Z","description":"An MIT research group analyzed delay-bounding TCP congestion control algorithms (CCAs) and found that most result in unfair bandwidth distribution across...","image":"https://media.daily.dev/image/upload/s--0_ODbtD2--/f_auto/v1722860399/public/Placeholder%2008","thumbnailUrl":"https://media.daily.dev/image/upload/s--0_ODbtD2--/f_auto/v1722860399/public/Placeholder%2008","isAccessibleForFree":true,"articleSection":"ipSpace.net Blog","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"ipSpace.net Blog","logo":"https://media.daily.dev/image/upload/s--xS7E82MT--/f_auto,q_auto/v1786438303/logos/ipspace?_a=BAMAMicg0","url":"https://daily.dev/sources/ipspace"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/congestion-control-algorithms-are-not-fair-ipspace-net-blog-cejypwdxy","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"distributed-systems","timeRequired":"PT1M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"ipSpace.net Blog","item":"https://daily.dev/sources/ipspace"},{"@type":"ListItem","position":3,"name":"Congestion Control Algorithms Are Not Fair « ipSpace.net blog"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/congestion-control-algorithms-are-not-fair-ipspace-net-blog-cejypwdxy#faq","mainEntity":[{"@type":"Question","name":"What did MIT researchers find about delay-bounding TCP congestion control algorithms and fairness?","acceptedAnswer":{"@type":"Answer","text":"MIT researchers proved that all delay-bounding, delay-convergent congestion control algorithms (CCAs) must suffer from unfair bandwidth distribution across parallel flows. 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