Conditional UE Mobility Reconfiguration Based on Data Traffic
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Solution Overview
Problem
Conventional mobility procedures in wireless networks, such as handovers and dual connectivity operations, face challenges due to the reliance on UE signal measurements for conditional mobility execution conditions, which can lead to unsuccessful command delivery and radio link failures, especially in scenarios like conditional PSCell addition and inter-SN CPC.
Innovation Solution
Implementing conditional reconfigurations based on data traffic conditions, including thresholds for UL/DL data volume, throughput, and signal measurements, allowing UEs to execute mobility operations proactively when specific execution conditions are met, reducing reliance on reactive network signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional mobility procedures rely on UE signal measurements for conditional mobility execution conditions, then mobility operations can be performed, but unsuccessful command delivery and radio link failures occur especially in conditional PSCell addition and inter-SN CPC scenarios
Solution Approach 1:
The patent changes the execution condition parameters from signal measurements alone to a combination of data traffic conditions (UL/DL data volume, throughput thresholds) and signal measurements. This allows mobility operations to be triggered based on actual traffic needs rather than just signal quality, improving reliability by ensuring commands are executed when truly necessary.
Solution Approach 2:
The network node provides conditional reconfigurations to the UE in advance, including multiple candidate target cells and their associated execution conditions. The UE stores these configurations and autonomously executes them when conditions are met, eliminating the need for real-time network signaling during mobility execution and preventing command delivery failures.
2Adaptability or versatility
If conditional reconfigurations are provided for multiple candidate target cells, then mobility options increase, but UE processing and configuration management complexity increases
Solution Approach 1:
Each conditional reconfiguration is segmented into distinct components: a specific candidate target cell identifier, associated execution conditions (data traffic thresholds, signal measurements), and reconfiguration parameters. This structured segmentation allows the UE to independently evaluate and execute individual reconfigurations without being overwhelmed by the overall complexity of multiple options.
Solution Approach 2:
The UE autonomously monitors its own data traffic conditions and signal measurements against the provided execution conditions, and independently decides when to execute which reconfiguration. This self-service approach reduces the need for continuous network control signaling and simplifies configuration management by distributing the decision-making logic to the UE.
3Loss of time
If mobility operations are executed proactively based on data traffic conditions, then signaling delays are reduced, but the complexity of monitoring multiple execution conditions increases
Solution Approach 1:
The UE's condition monitoring mechanism is designed to universally handle multiple types of execution conditions simultaneously - both data traffic conditions (UL/DL data volume, throughput) and signal measurement conditions. This multi-functional monitoring approach allows the UE to evaluate all conditions in a unified manner, reducing overall complexity compared to separate monitoring systems for each condition type.
Solution Approach 2:
All execution conditions and their corresponding thresholds are provided to the UE in advance along with the conditional reconfigurations. The UE prepares by storing these conditions and begins monitoring immediately, enabling proactive mobility execution without waiting for network signaling. This preliminary preparation minimizes execution delay while the structured condition format keeps monitoring manageable.
Data Source
AI summary
Embodiments include methods for a UE to perform mobility operations in a wireless network based on conditions related to data traffic. Such methods include receiving, from a network node, one or more conditional reconfigurations. Each includes a reconfiguration message associated with a candidate target cell and one or more execution conditions that need to be fulfilled to apply the reconfiguration message when performing a mobility operation, including at least one first execution condition related to UE data traffic and/or to one or more UE applications. Such methods include monitoring for the execution conditions in the conditional reconfigurations and based on detecting fulfillment of one or more execution conditions in a particular conditional measurement configuration, performing a mobility operation towards the candidate target cell associated with the reconfiguration message in the particular conditional measurement configuration. Other embodiments include complementary methods by a network node, as well as UEs and network nodes