From the course: 4G LTE: Architecture, Protocols, Call Flows, KPIs, Optimization, Performance Analysis

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Signal to interference and noise ratio (SINR)

Signal to interference and noise ratio (SINR)

From the course: 4G LTE: Architecture, Protocols, Call Flows, KPIs, Optimization, Performance Analysis

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Signal to interference and noise ratio (SINR)

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A network can perform perfectly in the middle of the night when no one is using it. But what happens during the evening rush when thousands of people are streaming and calling at once? The interference picture changes completely in this case. To predict and diagnose problems during these busy hours, we need a specific measurement taken under the loaded scenario and that measurement is termed as SINR which is signal to interference plus noise ratio. It measures the quality under the loaded network conditions. While RSRQ is excellent baseline but SINR gives us a more aggressive assessment. It compares the power of the desired signal which is RSRP to everything that isn't that signal. It includes intense interference from loaded neighboring cells and all other noise. The formula in this case is SINR is equal to RSRP divided by interference plus noise. And this makes SINR the critical indicator for performance during peak traffic times. We do the drive test to capture SINR also. We have…

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