Unified RLM Process for Multi-Cell Channel Measurement
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Solution Overview
Problem
In 5G New Radio (NR) systems, especially in massive MIMO scenarios, the existing protocols do not support channel measurement and reporting for extra Physical Cell Identifiers (PCIs) associated with Transmission Configuration Indication (TCI) states, limiting inter-cell mobility management and requiring separate Radio Link Management (RLM) processes for serving and neighbor cells.
Innovation Solution
A method and device for channel measurement and reporting that simultaneously perform measurements on multiple reference signal resource sets, allowing for inter-cell mobility management without triggering handovers by using a unified solution applicable to various communication scenarios, including massive MIMO and LTE multi-antenna systems, to determine Radio Resource Control (RRC) link failures and update TCI states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal maintains separate RLM processes for serving and neighbor cells, then the channel measurement capability is improved, but the device complexity increases
Solution Approach 1:
The patent merges the RLM processes for serving and neighbor cells into a unified process. The terminal maintains a single RLM process that performs channel measurements on both the serving cell and neighbor cells simultaneously, eliminating the need for separate RLM processes while preserving full measurement capability across all cells.
Solution Approach 2:
The unified RLM process is designed to be universal, capable of performing channel measurements on multiple cells (both serving and neighbor cells) through a single mechanism. This multi-functional approach allows the same process to handle measurements across different cell types without requiring cell-specific separate processes.
2Measurement precision
If separate RLM processes are maintained for serving and neighbor cells, then the measurement accuracy is improved, but the processing time increases
Solution Approach 1:
The unified RLM process enables continuous channel measurement across all cells without interruption or sequential switching. By maintaining a single ongoing measurement process that simultaneously monitors serving and neighbor cells, the system eliminates the time loss associated with transitioning between separate measurement processes while preserving measurement accuracy.
3Device complexity
If a unified solution is adopted for various communication scenarios, then the hardware complexity is reduced, but the adaptability to specific scenarios may be compromised
Solution Approach 1:
The patent implements a unified RLM process designed with universal applicability across multiple communication scenarios including massive MIMO, beam-based communications, and LTE multi-antenna systems. The single process adapts to different scenarios through configuration parameters rather than requiring scenario-specific hardware or process variations, thereby maintaining both hardware simplicity and scenario adaptability.
Data Source
AI summary
The present disclosure provides a method and device in a node used for wireless communications. A node first performs a channel measurement respectively on a first reference signal resource set and a second reference signal resource set, and both the first reference signal resource set and the second reference signal resource set comprise at least one reference signal resource; then as a response to K consecutive out-of-step(s), starts a first timer; and as a response to an expiry of the first timer, transmits a target message; a measurement performed on a target reference signal resource set is used to determine the K consecutive out-of-step(s), the target reference signal resource set is one of the first reference signal resource set and the second reference signal resource set. The application improves the method and device of M-TRP inter-cell mobility to optimize the system performance.