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Rich Communications Service (RCS) failed to differentiate itself from existing OTT services since it appeared in the market for the first time in 2012. Its functions were disappointedly incomplete and its UX/UI was plain and unattractive compared with OTT services. It also took a long time to stabilize due to the technical complexities and operators’ slow decision making process. Wit...

02/11/2016

26,186

Tech-Blog

Do Google Global Caches (GGCs) serve YouTube live traffic as well, or not?

Google Global Caches (GGCs) have already been deployed in many telecom operators' data centers around the world, caching YouTube video files like Psy's Gangnam Style for the local users. This allows people around the globe to watch Psy singing and dancing without buffering through their local GGCs. Korean operators like SK Telecom, LG U+ and KINX have also made the same move in February...

11/20/2013

81,893

Tech-Blog

YouTube's Live TV Streaming in Mobile Devices - HLS & Adaptive

This post will analyze the streaming methods used in YouTube's Live TV streaming services for mobile devices in an LTE network and a Wi-Fi network based on our actual measurements. YouTube's Live TV Streaming in Mobile Devices: HLS & Adaptive First, measurements in an LTE network The mobile device and network used for our measurement were Galaxy S4 and KT LTE network. First,...

10/30/2013

74,921

Tech-Blog

YouTube, changing the way of delivering videos: Chunking and Adaptive Streaming are In,...

Recently, YouTube has changed/evolved the way it delivers video contents. It used to be a big fan of HTTP progressive download (downloading a video file by a single request just like downloading a data file) until last year. However, from this year, many efforts have been made by YouTube (e.g. switching to chunking and adaptive streaming) for improved video delivery. We will focus on "switching...

10/04/2013

66,286

Tech-Blog

Who wins? - OTT Cache vs. Operator Cache

Sandvine has recently reported that, in the second half of 2012, Netflix and YouTube accounted for 48% (33% and 15% respectively) of the total Internet traffic in North America, making telecom operators' IP network look like a video transport network rather the Internet. With an ever-increasing number of users and higher-resolution videos, the traffic of these two (and hence the delivery c...

04/11/2013

66,598

Tech-Blog

Google Global Cache (GGC) Operations for YouTube (2): LG U+ Case (with GGC)

As noted in our previous post, we will present you workflow that shows how a YouTube video is downloaded to an LG U+ subscriber device via Google Global Caches installed in the LG U+ Internet. First, we will discuss the case when LG U+ Google servers have a video that has been requested by a subscriber (Cache Hit). Then, we will discuss the case when none of the servers have it (Cache Miss)....

04/18/2012

79,921

Tech-Blog

Google Global Cache (GGC) Operations for YouTube (1): KT Case (Without GGC)

We are going to present you workflow that shows how a YouTube video is downloaded to a subscriber device via Google Global Caches installed in LG U+. Below, we will look at downloading over the KT Internet, which has no Google Global Cache installed in it. In the subsequent post, downloading procedures in the LG U+ Internet, which has Google Global Caches installed in it, will be discussed...

04/16/2012

72,176

Tech-Blog

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