Location-Based RIS Beam Management to Reduce Measurement Overhead
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Solution Overview
Problem
The existing beam management process in RIS-MIMO systems requires multiple measurements, leading to long measurement times and high system overheads.
Innovation Solution
A method for optimizing beam management by determining first measurement information based on a beam set using location information of a terminal device, reducing the need for complex measurements and system overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple measurements are performed to obtain channel information between the access point, RIS, and terminal device, then measurement precision is improved, but measurement time increases and system overheads increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring beam sets at the access point based on terminal location information before actual communication. This allows the terminal to directly select and use appropriate beams without performing complex real-time measurements, thereby reducing measurement time while maintaining beam selection accuracy through the pre-established beam sets that cover different spatial directions.
Solution Approach 2:
The patent extracts the essential function of beam selection by having the terminal device autonomously select beams from pre-configured beam sets based on simple criteria, rather than requiring the terminal to participate in complex multi-stage measurements. This extraction simplifies the measurement process while still achieving accurate beam pairing between the RIS and terminal device.
2Measurement precision
If multiple measurements are performed to obtain channel information, then beam selection accuracy is improved, but system overheads increase
Solution Approach 1:
The access point performs preliminary configuration of beam sets based on terminal location information before communication begins. This pre-configuration includes organizing beams in different spatial directions into structured beam sets, which eliminates the need for complex real-time measurement procedures while maintaining accurate beam selection capability through the pre-established spatial structure.
Solution Approach 2:
The terminal device autonomously selects appropriate beams from the pre-configured beam sets based on simple criteria without requiring complex measurement procedures or extensive network coordination. This self-service approach reduces system overheads by minimizing the need for complex measurement scheduling, feedback reporting, and network-side processing while maintaining beam selection accuracy.
Data Source
AI summary
A beam management method and apparatus to optimize a beam management procedure between a reconfigurable intelligent meta-surface (RIS) and a terminal device, so that beam management efficiency may be improved, and system overheads may be reduced. The method includes: determining first measurement information based on information of a beam set, sending the first measurement information, and communicating with a RIS through a first beam, where the beam set is determined based on first location information of a terminal device, the beam set includes one or more beams between the RIS and the terminal device, the first measurement information includes information determined by the terminal device based on a beam corresponding to a downlink reference signal, and the first beam is a beam in the beam set.