5G Cell Selection Using Path Diversity Against Ping-Pong Handover
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G wireless communication systems, selecting an optimal cell based solely on signal strength can lead to suboptimal performance due to beamforming techniques, resulting in communication disruptions and ping-pong phenomena, especially when obstacles block paths.
Innovation Solution
A method and apparatus that determine the optimal cell by considering both the strength of the received signal and path diversity, using a terminal and base station configuration to measure and report signal strength and path diversity information, allowing for selection of cells with robust and reliable communication paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cell selection is based only on signal strength, then the selection process is simple, but communication stability deteriorates due to ping-pong phenomena and disruptions
Solution Approach 1:
The patent introduces path diversity (PD) as an additional parameter for cell selection beyond the traditional signal strength metric. The cell representative value is calculated by combining signal strength and PD metrics, transforming the selection criterion from a single parameter to a multi-parameter evaluation system. This resolves the contradiction by maintaining operational simplicity through automated calculation while improving communication stability through more comprehensive cell evaluation.
Solution Approach 2:
The patent creates a composite evaluation metric (cell representative value) that combines multiple properties: signal strength and path diversity. This composite metric allows the system to simultaneously consider both the simplicity of signal strength measurement and the stability benefits of path diversity analysis, effectively resolving the contradiction between ease of operation and communication reliability.
2Productivity
If beamforming techniques are used, then data rates increase, but cell selection accuracy worsens due to blocked paths and signal strength misrepresentation
Solution Approach 1:
The patent introduces path diversity (PD) as an intermediary metric that bridges the gap between beamforming performance and cell selection accuracy. PD serves as a mediator that captures the actual communication reliability by analyzing multiple propagation paths, compensating for the misrepresentation caused by beamforming's focused signal transmission. This allows accurate cell selection while maintaining beamforming's high data rate capabilities.
Solution Approach 2:
The patent adds a new dimension to cell evaluation by introducing path diversity analysis alongside signal strength. This dimensional expansion allows the system to evaluate cells not just by instantaneous signal power but also by the diversity of propagation paths, providing a more accurate assessment of cell quality in beamforming environments where signal strength alone is misleading.
3Reliability
If path diversity is considered in cell selection, then communication stability improves, but the selection process complexity increases
Solution Approach 1:
The patent implements self-service by enabling the terminal to autonomously calculate the cell representative value using locally available signal strength and path diversity measurements. The terminal independently performs the multi-parameter evaluation without requiring complex network-side processing, thereby improving communication stability through PD consideration while avoiding excessive system complexity by distributing the computational burden to the terminal device.
Data Source
AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An apparatus of a terminal in a wireless communication system is provided. The apparatus includes at least one transceiver and at least one processor operatively coupled to the at least one transceiver. The at least one processor is configured to control the transceiver to communicate through a cell determined based on information regarding a strength of a received signal for a first cell and a path diversity (PD) for the first cell. The PD comprises information regarding paths associated with the first cell.