What is the time UE measures RSRP Sample?

Specs & Protocol Testing
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What is the time UE measures RSRP Sample
What is the time UE measures RSRP Sample903Ă—770 255 KB

What is the time UE measures RSRP Sample?

  • Every 50ms
  • Every 100ms
  • Every 150ms
  • Every 10ms
  • None of the Above
  • All of the Above
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measurements are typically performed once per subframe. Therefore, RSRP measurements are performed 10 times per frame in an LTE network.

Each subframe is 1 millisecond, and RSRP measurements are typically performed at the beginning of each subframe. This means that RSRP measurements are performed at a rate of 1000 Hz, or once every millisecond.

It’s important to note that the frequency of RSRP measurements may vary depending on network load, signal quality, and other factors. In addition, other parameters such as RSRQ (Reference Signal Received Quality) and SINR (Signal-to-Interference plus Noise Ratio) may also be used to measure the quality and strength of the signal received by the device. The exact frequency of these measurements may depend on the specific network configuration and device being used.

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There isn’t a single, fixed time period for RSRP measurement in either 4G (LTE) or 5G (NR) UEs. The exact timing can vary depending on several factors:

UE Implementation: The specific way a UE is designed can influence how often it measures RSRP.

Network Instructions: The network itself can send messages to the UE instructing it to take RSRP measurements at specific intervals.

Cell Conditions: If the signal strength is rapidly changing, the UE might take more frequent measurements to keep track of the best cell for connection.

However, while there’s no single answer, RSRP measurements typically happen multiple times per second. This allows the UE to constantly monitor signal strength and help make decisions about cell selection, handover (switching between cells), and other radio resource management tasks.

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I was reading this in “LTE Optimization Engineering Handbook”, so I thought to share in the group for correct answers.

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As per current version of specification, the network may configure the UE to perform the following types of measurements.

  1. NR measurements.
  2. Inter-RAT measurements of E-UTRA frequencies.

NR use both SSB based measurements and CSI-RS based measurements for handover. We will discuss the use case of SSB and CSI-RS based measurement

SMTC (SSB based measurement timing configuration): — This is one of the important parameter. As we know the possible SSB burst periodicity is 5, 10, 20, 40, 80 and 160ms but for a UE in connected mode, it is not required to measure with this periodicity and the appropriate measurement periodicity can be configured according to the channel conditions. This would avoid unnecessary measurements and save UE power also at some extent. The SMTC window has been introduced to notify the UE about the periodicity and the timing of the SSBs that the UE must use for cell quality measurements.