Fix "unpredictable" sections #163
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draft-ietf-mops-streaming-opcons.md
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| ## Predictable Usage Profiles {#sec-predict} | ||
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| Historical data shows that users consume more videos and at a higher bit rate than they did in the past on their connected devices. Improvements in the codecs that help with reducing the encoding bitrates with better compression algorithms could not have offset the increase in the demand for the higher quality video (higher resolution, higher frame rate, better color gamut, better dynamic range, etc.). In particular, mobile data usage has shown a large jump over the years due to increased consumption of entertainment as well as conversational video. | ||
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| ## Unpredictable Usage Profiles {#sec-unpredict} | ||
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| Although TCP/IP has been used with a number of widely used applications that have symmetric bandwidth requirements (similar bandwidth requirements in each direction between endpoints), many widely-used Internet applications operate in client-server roles, with asymmetric bandwidth requirements. A common example might be an HTTP GET operation, where a client sends a relatively small HTTP GET request for a resource to an HTTP server, and often receives a significantly larger response carrying the requested resource. When HTTP is commonly used to stream movie-length video, the ratio between response size and request size can become arbitrarily large. | ||
| It is also possible for usage profiles to change significantly and suddenly. These changes are more difficult to plan for, but at a minimum, recognixing that sudden changes are happening is critical. |
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s/recognixing/recognizing
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| The BitTorrent case study is just one example, but the example is included here to make it clear that unpredicted and unpredictable massive traffic spikes may not be the result of natural disasters, but they can still have significant impacts. | ||
| * Many access networks for end users used underlying technologies that are inherently asymmetric, favoring downstream bandwidth (e.g. ADSL, cellular technologies, most IEEE 802.11 variants), assuming that most users will need more downstream bandwidth than upstream bandwidth. This is a good assumption for client-server applications such as streaming video or software downloads, but BitTorrent rewarded peers that uploaded as much as they downloaded, so BitTorrent users had much more symmetric usage profiles which interacted badly with these assymetric access network technologies. |
draft-ietf-mops-streaming-opcons.md
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| Subsequently, the Internet Architecture Board (IAB) held a COVID-19 Network Impacts Workshop {{IABcovid}} in November 2020. Given a larger number of reports and more time to reflect, the following observations from the draft workshop report are worth considering. | ||
| Early in 2020, the CoViD-19 pandemic and resulting quarentines and shutdowns led to significant changes in traffic patterns, resulting from a causes such as large number of people who were suddenly working and attending school remotely, and using more interactive applications (video conderencing, in addition to streaming media). Subsequently, the Internet Architecture Board (IAB) held a COVID-19 Network Impacts Workshop {{IABcovid}} in November 2020. The following observations from the workshop report are worth considering. |
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s/Early in 2020, the CoViD-19 pandemic and resulting quarentines and shutdowns led to significant changes in traffic patterns, resulting from a causes such as large number of people who were suddenly working and attending school remotely, and using more interactive applications (video conderencing, in addition to streaming media). Subsequently, the Internet Architecture Board (IAB) held a COVID-19 Network Impacts Workshop {{IABcovid}} in November 2020. The following observations from the workshop report are worth considering.
/Early in 2020, the CoViD-19 pandemic and resulting quarantines and shutdowns led to significant changes in traffic patterns, due to a large number of people who suddenly started working and attending school remotely and using more interactive applications (video conferencing, in addition to streaming media). Subsequently, the Internet Architecture Board (IAB) held a COVID-19 Network Impacts Workshop {{IABcovid}} in November 2020. The following observations from the workshop report are worth considering.
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Fixed a few typos, otherwise ready to merge. |
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Merging on Ali's review. |
close #140