TRP Handover via Neighbor Reporting for Signal Quality
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Solution Overview
Problem
In multi-TRP environments, the performance of radio signals degrades at the boundary of cells and transmission reception points (TRPs), leading to reduced quality of service for terminals, necessitating a method to maintain high-quality radio signals.
Innovation Solution
A handover method involving the search for neighbor TRPs, reporting TRP information, and switching between TRPs or distributed units (DUs) to ensure seamless communication, including procedures for TRP and DU switching, beam change detection, and synchronization signal management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple TRPs are deployed to extend coverage, then coverage area is improved, but radio signal quality degrades at cell boundaries
Solution Approach 1:
The base station is segmented into multiple TRPs (transmission reception points) that are distributed across different locations. Each TRP independently provides coverage to specific areas, allowing the system to extend overall coverage while maintaining signal quality through localized transmission points rather than relying on a single centralized base station
Solution Approach 2:
The patent implements dynamic TRP switching and beam management where the terminal can switch between different TRPs based on real-time signal conditions. The system dynamically adjusts beam directions and selects optimal TRPs to maintain high signal quality as the terminal moves through the coverage area, preventing degradation at cell boundaries
2Speed
If handover procedures are implemented for terminal mobility, then mobility is improved, but connection stability deteriorates during handover transitions
Solution Approach 1:
The system performs preliminary beam searches and neighbor TRP measurements before actual handover is needed. By pre-establishing beam configurations and identifying suitable target TRPs in advance, the system minimizes disruption during handover transitions, maintaining connection stability while enabling rapid mobility
Solution Approach 2:
The patent implements seamless TRP switching with continuous beam management where the terminal maintains active connections during transition. The system ensures uninterrupted data transmission by coordinating between source and target TRPs, preventing connection drops and maintaining stability throughout the handover process
3Measurement precision
If beam search procedures are used to detect beam changes, then beam alignment accuracy is improved, but handover latency increases
Solution Approach 1:
The system performs partial beam searches by limiting the search scope to predefined beam directions and neighbor TRPs rather than exhaustive searches. This selective approach maintains sufficient beam alignment accuracy while significantly reducing the time required for beam detection and handover execution
Data Source
AI summary
A handover method of a terminal may comprise: performing a procedure to search for neighbor TRPs including a target TRP; transmitting a neighbor TRP information report message including information on searched neighbor TRPs to a current serving TRP; receiving, from a DU to which the terminal is connected and through the current serving TRP, a command indicating TRP switching for switching a serving TRP of the terminal from the current serving TRP to the target TRP; and performing an access procedure to the target TRP according to the command indicating the TRP switching, wherein the TRP switching is determined based on the neighbor TRP information report message.