Compact Beam Measurement Reports via Index Mapping
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently reducing the payload size of Layer 1 (L1) measurement reports, particularly for beam measurements like RSRP and SINR, which consume resources and limit the reliability of frequent and periodic reports in scenarios such as handoff or handover.
Innovation Solution
Implementing compact measurement reports that use beam index numbers instead of resource indicators, allowing each beam index number to reference a position in a reference set, thereby reducing the bit count from 16 bits to 8 bits for an L1-SINR measurement report, enabling a 50% reduction in payload size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If resource indicators are used to identify beams in measurement reports, then beam identification accuracy is maintained, but payload size increases
Solution Approach 1:
The patent creates a compact copy of the beam measurement report that references a pre-configured reference set of resource indicators. Instead of transmitting full resource indicators, the UE transmits compact measurement reports containing only indices that point to positions in the reference set, thereby reducing payload size while maintaining beam identification accuracy through the established correspondence between indices and resource indicators
Solution Approach 2:
The patent changes the representation parameter of beam identifiers from full resource indicators to compact indices. By transforming the measurement report format to use index numbers that reference a pre-configured set of resource indicators, the payload size is reduced from 16 bits to 8 bits per beam measurement while preserving the ability to accurately identify beams through the index-to-resource-indicator mapping
2Productivity
If compact measurement reports with reduced payload size are transmitted, then resource efficiency improves, but reporting coverage may be limited
Solution Approach 1:
The patent performs preliminary configuration of a reference set of resource indicators through RRC signaling before the UE transmits compact measurement reports. This pre-configuration establishes a shared understanding between the gNB and UE about the mapping between compact indices and full resource indicators, enabling the UE to transmit reduced-size reports without losing reporting coverage, as the gNB can reconstruct the full beam identification information using the pre-configured reference set
Solution Approach 2:
The patent introduces a reference set of resource indicators as an intermediary between the compact measurement report and the full beam identification information. This reference set acts as a lookup table that enables the gNB to translate compact indices back into complete resource indicator information, thereby maintaining reporting coverage and reliability while benefiting from the reduced payload size of compact reports
3Measurement precision
If frequent and periodic measurement reports are transmitted, then beam measurement accuracy improves, but resource consumption increases
Solution Approach 1:
The patent changes the format parameter of measurement reports from full resource indicators to compact indices, reducing the payload size by 50% (from 16 bits to 8 bits per beam measurement). This parameter change allows the system to transmit frequent and periodic beam measurement reports with improved accuracy while consuming fewer uplink resources and energy, as the reduced payload size directly decreases the transmission resource requirements
Data Source
AI summary
A RAN node can indicate to a UE that a compact measurement report is to be used for beam measurements in a measurement report. A compact measurement report uses beam index numbers to indicate a position in a reference set. The reference set has a listing of resource indicators for beam measurements. As such, a reported beam measurement associated with a beam index number is also associated with the resource indicator positioned in the reference set indicated by the beam index number. The beam index numbers can be transmitted using fewer bits than are used for a resource indicator. The payload for a measurement report such as a L-SINR or L-RSP L1 measurement report is thereby reduced when the measurement report is transmitted as a compact measurement report.