“Ultimately, one-size does not fit all in terms of visibility architectures,” Light Reading concluded. “You need one that is sized to your network’s specific configuration and needs.”
“Delay is proving to be one of the most challenging metrics to manage in advanced wireline and wireless networks,” RCR Wireless said. Yet it is also “a critical component of both end user experience and infrastructure stability, since it can lead to dropped calls, slow browsing and TCP transport protocol performance impacts.”
Light Reading concurred: “lengthy network delays, is an issue bedeviling video content and service providers of all stripes and sizes. Buffering delays of even just a few milliseconds can lead to a poorer customer quality-of-experience (QoE) and much higher rates of video abandonment by subscribers.”
“The obvious shortcoming with these rough estimates is that they don’t offer any visibility into what might actually be happening on either network path,” Light Reading noted. “As a result, the estimates for one-way delays could be way off because of the asymmetrical nature of most video traffic. Worse yet, these estimates could wind up producing ‘false positives,’ incorrectly indicating no latency problems overall when in fact there may be huge traffic delays occurring in one direction or the other.
Clearly, “service providers must measure and monitor one-way network latency directly and accurately,” regardless of the cost of doing so, Light Reading concluded. (We would add that it does not need to be prohibitively costly, and solutions exist that leverage virtualization and other low-cost technologies to accurately measure one-way delay.)