Semi-persistent MRS Configuration for Beam Alignment
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Solution Overview
Problem
Current wireless communication systems face challenges in beam alignment and measurement reporting, particularly at high frequencies like millimeter-waves, due to the need for explicit measurement triggers and potential failures in transmitting these triggers, leading to misalignment and increased overhead.
Innovation Solution
Implementing a semi-persistent measurement reference symbol (MRS) configuration that allows for periodic transmission of MRSs independent of activation, reducing the need for explicit measurement triggers and enabling consistent beam management without explicit beam alignment messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If explicit measurement triggers are used for beam alignment, then beam management can be performed, but overhead increases and transmission failures may cause misalignment
Solution Approach 1:
The patent extracts the measurement trigger function from the beam management process by using semi-persistent MRS configurations that are activated without requiring explicit measurement trigger messages. This removes the problematic trigger transmission step while maintaining beam management capability through periodic MRS transmissions based on configured parameters
Solution Approach 2:
The patent performs preliminary configuration of MRS parameters (periodicity, resources, beams) before actual measurement activation. The semi-persistent configuration is established in advance, allowing immediate activation without requiring detailed trigger messages, thus reducing overhead and potential failure points
2Ease of operation
If measurement triggers are transmitted explicitly, then measurements can be activated, but transmission failures lead to beam misalignment
Solution Approach 1:
The patent implements self-service by configuring MRS parameters (periodicity, time resources, frequency resources, beam identifiers) that enable the system to automatically perform measurements without external triggers. The semi-persistent configuration allows the UE to autonomously conduct measurements based on pre-configured parameters, eliminating reliance on trigger transmission reliability
Solution Approach 2:
The patent provides beforehand cushioning by establishing robust semi-persistent configurations with detailed parameters before activation. This preparatory configuration ensures that even if activation messages face challenges, the measurement framework is already in place and can be reliably activated, preventing beam misalignment
3Productivity
If periodic MRS transmission is configured independently of activation, then overhead is reduced, but coordination between configuration and activation must be maintained
Solution Approach 1:
The patent segments the measurement management process into two independent parts: (1) semi-persistent configuration of MRS parameters, and (2) simple activation command. This segmentation allows the complex configuration to be done once independently, followed by simple activation, improving efficiency while maintaining coordination through the structured two-stage approach
Data Source
AI summary
Aspects of the present disclosure relate to wireless communications and, more particularly, to semi-persistent configuration of reference signals (RSs), such as measurement reference signals (MRSs) for beam refinement. An example method generally includes transmitting, to a user equipment (UE), a reference symbol (RS) configuration, wherein transmitting the RS configuration is independent of activating RS training for the UE, transmitting, to the UE, a message indicating an activation of RS training subsequent to transmitting the RS configuration, transmitting RSs to the UE periodically based on the RS configuration, and receiving, from the UE, measurement reports based on the transmitted RS.