gNB Handover via CSI-RS Directional Measurement
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently performing handovers in cellular networks, particularly for mobile devices at cell edges, which can lead to performance degradation and require improved methods for handover operations.
Innovation Solution
The proposed solution involves a method for performing handovers in wireless networks, including 3GPP, 5G, and New Radio (NR) networks, by using transmit-receive points (TRPs) and leveraging reference signals for accurate signal quality measurements, enabling optimal handover decisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover methods are used in cellular networks, then handover operations can be performed with existing infrastructure, but performance degradation occurs for mobile devices at cell edges and handover efficiency is insufficient
Solution Approach 1:
The patent introduces reference signals as an intermediary mechanism between base stations and mobile devices. These reference signals serve as mediators that enable accurate channel quality measurement and facilitate reliable handover decisions, particularly for devices at cell edges where traditional methods fail to provide sufficient performance
Solution Approach 2:
The patent replaces traditional handover mechanisms with an advanced measurement-based system. Instead of relying on conventional handover procedures, the system uses reference signal measurements and channel quality indicators to trigger handovers, substituting mechanical/protocol-based handover with measurement-driven intelligent handover
2Reliability
If handover is performed for cell edge devices, then network coverage and performance are improved, but measurement accuracy and signal quality assessment become more difficult
Solution Approach 1:
The patent implements preliminary measurement configuration where the network configures mobile devices with reference signal resources and measurement parameters before handover is needed. This preliminary setup ensures that when handover decisions are required, accurate measurements are already available, eliminating the need for complex real-time measurements at the critical handover moment
Solution Approach 2:
The patent establishes a feedback mechanism where mobile devices continuously report channel quality indicators and measurement results to the network. This feedback loop enables the network to maintain accurate knowledge of signal conditions and make informed handover decisions, improving both measurement precision and overall reliability
Data Source
AI summary
Embodiments of a generation Node-B (gNB), User Equipment (UE) and methods for communication are generally described herein. The gNB may receive, from the UE, a first measurement report that indicates a first signal quality measurement based on new radio synchronization signals (NR-SS). The gNB may determine, based on reception of the first measurement report, a transmission direction for transmission of channel state information reference signals (CSI-RS) for a second RRM measurement at the UE based on the CSI-RS. The gNB may receive, from the UE, a second measurement report that indicates a second signal quality measurement based on the CSI-RS. The gNB may determine, based at least partly on the first and second signal quality measurements, whether to initiate a handover of the UE from a serving cell to a neighbor cell.