Conditional Mobility Signaling for DU-CU Execution Conditions
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing execution conditions for mobility in mobile communication networks, particularly in heterogeneous environments with varying coverage areas and device capabilities, leading to suboptimal performance and resource utilization.
Innovation Solution
Implementing a signaling mechanism that adapts to execution conditions based on wireless device and network configurations, traffic load, and packet characteristics, enabling selective implementation of protocols to optimize communication in heterogeneous networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single protocol is used for all mobility scenarios, then implementation complexity is reduced, but performance is suboptimal in heterogeneous networks
Solution Approach 1:
The patent implements dynamic protocol selection by introducing execution conditions that determine which mobility protocol (conditional handover or handover with early data transmission) should be used. The network configures multiple protocols and the UE selects the appropriate one based on real-time conditions such as signal quality, buffer status, and network load, allowing the system to adapt to heterogeneous scenarios without permanent complexity in all components.
Solution Approach 2:
The patent changes the execution parameters of mobility protocols by introducing conditional execution based on buffer status, signal quality thresholds, and network configuration parameters. By varying these parameters dynamically, the system selects the most appropriate protocol for each scenario, improving adaptability while maintaining manageable complexity through parameter-driven decision-making.
2Productivity
If mobility protocols are optimized for specific scenarios, then communication efficiency is improved, but resource utilization becomes suboptimal due to lack of adaptation
Solution Approach 1:
The patent makes resource utilization dynamic by configuring multiple mobility protocols with different resource allocation strategies. The UE monitors execution conditions including buffer status and signal quality, and selects the protocol that best matches current network conditions, thereby optimizing resource utilization adaptability while maintaining scenario-specific efficiency.
Solution Approach 2:
The patent applies different protocol configurations to different local conditions (execution conditions). Each protocol is optimized for specific scenarios (e.g., handover with early data transmission for good signal conditions, conditional handover for poor conditions), and the selection mechanism ensures the locally optimal protocol is used for each situation, achieving both efficiency and adaptability.
3Speed
If handover with early data transmission is always used, then data transmission speed is improved, but reliability decreases in poor signal conditions
Solution Approach 1:
The patent applies preliminary anti-action by preparing multiple protocol options in advance and selecting the appropriate one based on predicted execution conditions. By evaluating signal quality, buffer status, and other parameters before handover execution, the system prevents the use of early data transmission protocols in poor signal conditions where they would fail, thereby maintaining reliability while enabling speed optimization when conditions permit.
Solution Approach 2:
The patent dynamically selects between handover protocols based on real-time signal conditions. When signal quality is good, early data transmission protocols are selected to maximize speed; when signal quality deteriorates, conditional handover protocols are selected to ensure reliability. This dynamic adaptation resolves the contradiction between speed and reliability.
Data Source
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.