Dynamic Timing Advance Group Configuration for LTE Handover Latency
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Solution Overview
Problem
Current multicarrier communication systems face challenges in efficiently managing multiple timing advance groups, particularly in LTE networks, where handover processes and TAG configuration changes are not effectively handled, leading to inefficiencies and increased overhead during handovers.
Innovation Solution
The implementation of multiple timing advance groups (TAGs) in LTE networks, allowing for dynamic configuration and reconfiguration of TAGs using RRC signaling, enabling seamless handovers by maintaining or updating TAG configurations during handover processes, reducing latency and improving network efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If multiple timing advance groups are implemented with dynamic configuration, then handover latency is reduced and network efficiency is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent segments the timing advance management into multiple independent TAGs (Time Alignment Groups), where each TAG can be independently configured and managed. This segmentation allows the system to handle different carrier groups separately, enabling faster handovers by only reconfiguring the affected TAG rather than the entire timing advance configuration, thus reducing handover latency while managing complexity through modular organization.
Solution Approach 2:
The patent implements dynamic TAG configuration where TAG assignments and parameters can be changed in real-time based on network conditions and handover requirements. The system can dynamically add, remove, or modify TAGs during operation, allowing flexible adaptation to different scenarios without requiring complete reconfiguration, thereby reducing handover latency while keeping the system adaptable.
2Productivity
If multiple timing advance groups are implemented with dynamic configuration, then network efficiency and mobility management are improved, but signaling overhead increases
Solution Approach 1:
The patent merges multiple TAG configurations into a unified management framework where common parameters can be inherited or shared across TAGs. This merging approach allows the system to manage multiple timing advance groups efficiently by defining a base configuration that can be applied to multiple TAGs, reducing the total signaling overhead while maintaining the ability to differentiate when necessary for network efficiency.
Solution Approach 2:
The patent creates a universal TAG configuration structure that can serve multiple purposes and scenarios. The same configuration framework is used for initial setup, handovers, and ongoing management across different carrier groups, reducing the need for scenario-specific signaling and improving network efficiency through a standardized, multi-functional approach to TAG management.
3Reliability
If TAG configurations are maintained or updated during handover, then seamless handovers are enabled, but processing overhead and complexity increase
Solution Approach 1:
The patent performs preliminary TAG configuration and validation before handover execution. By pre-configuring TAG parameters and checking compatibility in advance, the system ensures that handovers can proceed seamlessly without last-minute processing delays or conflicts, maintaining reliability while managing processing complexity through advance preparation.
Solution Approach 2:
The patent implements self-service mechanisms where the system automatically manages TAG configuration updates during handover without requiring complex manual intervention or extensive processing. The handover procedure itself triggers and completes the TAG reconfiguration, enabling seamless operation while reducing processing overhead through automated self-management.
Data Source
AI summary
Methods, systems, and apparatuses are described for wireless communications. Cells may be grouped into a plurality of cell groups. A base station may transmit a control message to modify a cell group of a cell associated with a wireless device.