User Terminal Beam-Specific RSRP Reporting for 5G Measurement Accuracy
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Solution Overview
Problem
Existing LTE systems do not account for reception beams when calculating received quality, leading to potential deterioration of communication quality when beam forming is applied in future radio communication systems like 5G and NR.
Innovation Solution
A user terminal that includes a receiving section and a control section to report and determine measurement reports associated with predetermined reception beams, either autonomously or based on information from a radio base station, ensuring accurate communication quality assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam forming is applied to reception in future radio communication systems, then coverage and signal quality are improved, but existing measurement methods become inaccurate leading to communication quality deterioration
Solution Approach 1:
The patent changes the measurement parameters by introducing beam-specific measurement quantities (RSRP per reception beam, CSI per reception beam) instead of using traditional overall measurement methods. This allows the measurement system to adapt to beam forming by capturing signal characteristics specific to each beam, thereby maintaining measurement accuracy when beam forming is applied.
Solution Approach 2:
The patent segments the measurement process into beam-specific measurements. Instead of measuring the overall received signal quality, the system divides measurements into individual reception beams, measuring RSRP and CSI for each beam separately. This segmentation enables accurate assessment of communication quality in beam-formed systems by evaluating each beam's contribution independently.
2Loss of energy
If beam forming is applied to reception, then radio wave propagation loss is reduced, but existing LTE systems cannot accurately calculate received quality without considering reception beams
Solution Approach 1:
The patent introduces new measurement parameters specific to beam-formed reception, including RSRP per reception beam and channel state information per reception beam. These parameter changes enable accurate received quality calculation by accounting for the directional nature of beam forming, thereby resolving the inconsistency between energy loss reduction and measurement accuracy.
3Area of stationary object
If a user terminal uses multiple reception beams, then coverage is improved, but existing measurement reports do not reflect beam-specific quality leading to communication control issues
Solution Approach 1:
The patent segments the measurement report into beam-specific components, reporting RSRP and CSI for each reception beam individually. This segmentation preserves beam-specific quality information that would otherwise be lost in aggregate measurements, enabling the network to make informed decisions about beam management and resource allocation across the coverage area.
Solution Approach 2:
The patent implements feedback mechanisms where the user terminal reports beam-specific measurement results (RSRP per beam, CSI per beam) to the base station. This feedback provides the network with detailed information about the quality of each reception beam, enabling effective communication control and optimization of multi-beam operations.
Data Source
AI summary
A terminal is disclosed including a transmitter that transmits information regarding at least one reception power (RSRP: Reference Signal Received Power) and a processor that, when reporting of a first RSRP and a second RSRP is carried out, controls to transmit a value corresponding to the first RSRP, and a value corresponding a difference between the first RSRP and the second RSRP. In other aspects, a radio communication method is disclosed.