Conditional Mobility Signaling for Low-Latency 5G Candidate Cell Handover
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing mobility and resource allocation in heterogeneous networks, particularly in 5G New Radio (NR) environments, leading to suboptimal performance and increased latency.
Innovation Solution
Implementing a signaling mechanism that dynamically adjusts transmission parameters based on device capabilities and network conditions, utilizing a flexible protocol stack and adaptive beam management techniques to optimize resource allocation and mobility management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional mobility management protocols are used in heterogeneous networks, then device compatibility is maintained, but network efficiency and latency performance deteriorate
Solution Approach 1:
The patent implements dynamic protocol selection where the protocol stack adapts its behavior based on network conditions and device capabilities. The system dynamically switches between traditional mobility protocols and optimized protocols, adjusting transmission parameters in real-time to balance network efficiency gains with compatibility requirements across diverse devices.
Solution Approach 2:
The invention changes key protocol parameters such as transmission power, beamforming angles, and resource allocation patterns based on network state. By adjusting these parameters dynamically, the system achieves improved network efficiency and reduced latency while maintaining compatibility with existing devices through controlled parameter variations rather than fundamental protocol changes.
2Productivity
If resource allocation is optimized for specific network conditions, then network efficiency improves, but adaptability to diverse environments deteriorates
Solution Approach 1:
The system employs dynamic resource allocation that continuously adapts to changing network conditions and device capabilities. Resource blocks, transmission power, and beamforming parameters are adjusted in real-time based on environmental feedback, allowing the same optimized allocation strategy to effectively serve diverse wireless environments from urban macrocells to rural picocells.
Solution Approach 2:
The patent creates a universal resource allocation framework that can function across multiple network types and device categories. The optimized allocation mechanism incorporates device capability descriptors and network condition indicators, enabling a single flexible system to adapt its resource distribution strategy whether serving high-capability 5G devices or legacy devices in various deployment scenarios.
3Loss of time
If latency is reduced through optimized signaling, then real-time performance improves, but protocol complexity and implementation difficulty increase
Solution Approach 1:
The system performs preliminary actions by pre-configuring mobility parameters and beamforming settings during device attachment and handover preparation phases. By anticipating mobility events and pre-establishing optimal parameters, the system reduces actual handover latency without requiring complex real-time signaling, as much of the optimization work is completed in advance during less critical phases.
Solution Approach 2:
The invention extracts and separates critical latency-sensitive signaling functions from the general mobility management protocol stack. By isolating time-critical operations into dedicated fast-signaling pathways with simplified procedures, the system achieves reduced latency for mobility events while keeping the overall protocol complexity manageable through functional separation and specialized handling of time-sensitive operations.
Data Source
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AI summary
A method can include receiving, by a distributed unit (DU) of a base station from a central unit (CU) of the base station, a first message that includes a parameter indicating a conditional layer 1 or layer 2 triggered mobility (LTM) of a wireless device and an identifier of a candidate cell of the DU, for the conditional LTM. The method can also include sending, by the DU to the CU, a second message comprising a configuration for LTM associated with the candidate cell. The method can further include receiving, from the CU and after sending the configuration, a third message comprising a list of one or more candidate cells for a subsequent conditional LTM of the wireless device. The method can also include sending, to the CU, a fourth message comprising the at least one determined execution condition for the subsequent conditional LTM.