Early TA Acquisition for Radio Link Failure Recovery
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing radio link failures and optimizing mobility procedures in heterogeneous networks, particularly in 5G New Radio (NR) environments, leading to suboptimal user experience and network performance.
Innovation Solution
Implementing advanced mobility management protocols, including conditional handover and early TA acquisition mechanisms, to enhance the handling of radio link failures and improve network connectivity in heterogeneous environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover procedures are used in heterogeneous networks, then device mobility is supported, but radio link failures occur more frequently and network performance deteriorates
Solution Approach 1:
The patent implements conditional handover by pre-configuring handover conditions and target cell information before radio link failure occurs. The device continuously evaluates handover conditions (such as signal quality thresholds) and prepares handover to target cells in advance, executing handover only when conditions are met, thereby preventing radio link failures and maintaining network performance
Solution Approach 2:
The patent introduces dynamic handover evaluation mechanisms where the device continuously monitors radio link quality and adjusts handover decisions based on real-time conditions. The handover process becomes adaptive rather than static, allowing the system to respond dynamically to changing network conditions and prevent failures
2Reliability
If mobility management is optimized to reduce failures, then device switching between cells improves, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent changes key parameters of the handover process by introducing conditional thresholds for handover evaluation (e.g., signal quality thresholds, timing conditions). These parameter-based conditions simplify the decision-making logic compared to continuous complex evaluations, reducing signaling overhead while maintaining reliability through threshold-based triggers
3Reliability
If handover execution is delayed to optimize conditions, then handover success rate improves, but connection interruption time increases
Solution Approach 1:
The patent prepares handover in advance by pre-configuring target cell information and evaluating handover conditions before failure occurs. This preliminary action allows the device to have handover-ready configurations prepared, enabling rapid execution when conditions are met without excessive delay or connection interruption
Data Source
AI summary
A method can include transmitting, by a wireless device to a base station, via a first cell of the wireless device, an uplink signal based on determining a radio link failure of a second cell, the second cell being configured for early timing advance (TA) acquisition. The transmitting the uplink signal can be at least one of: based on the second cell being configured for early timing advance acquisition of the wireless device; or after receiving, by the wireless device, an indication to at least one of acquire a TA value of the second cell; start to acquire the TA value of the second cell; or transmit, by the wireless device via the second cell, a reference signal.