Conditional Handover Configuration With Early Data Forwarding
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing data forwarding during conditional handover procedures, leading to data loss and suboptimal network performance due to the lack of early data forwarding capabilities and autonomous handover decisions by user equipment (UEs).
Innovation Solution
The implementation of early data forwarding conditional handover configurations, where UEs transmit capability messages to request parameters for enhanced handover configurations, including early data forwarding indications, and perform target cell selection based on trigger conditions such as QoS thresholds and machine learning models, allowing data forwarding to the target cell before handover completion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional handover procedures are used where data forwarding occurs after handover completion, then network control and coordination are maintained, but data loss occurs and network performance deteriorates due to the delay in data forwarding
Solution Approach 1:
The patent enables the UE to perform target cell selection and initiate data forwarding to the target cell before the handover procedure is fully completed. The UE autonomously selects a target cell from candidate cells when trigger conditions are met, and data forwarding is established in advance, allowing data to be transmitted to the target cell prior to handover completion, thereby reducing data loss and handover interruption time
Solution Approach 2:
The patent grants the UE autonomous capability to perform target cell selection without requiring network control and coordination during the handover process. The UE independently evaluates trigger conditions (such as QoS thresholds, traffic patterns, or ML model predictions), selects the appropriate target cell from configured candidates, and initiates data forwarding autonomously, freeing the network from real-time handover control while improving data forwarding reliability
2Loss of information
If the network maintains full control over handover procedures, then coordination and control are preserved, but data loss increases and network performance decreases due to lack of early data forwarding capabilities
Solution Approach 1:
The patent enables the UE to autonomously perform target cell selection and initiate data forwarding without network control and coordination. The UE independently evaluates trigger conditions (QoS thresholds, traffic patterns, ML model predictions), selects the appropriate target cell from configured candidates, and initiates data forwarding autonomously, thereby reducing data loss while increasing automation extent
Solution Approach 2:
The UE is configured with candidate cells and trigger conditions in advance, and when conditions are met, the UE proactively selects a target cell and establishes data forwarding before handover completion, preventing data loss that would occur with traditional network-controlled handover timing
3Productivity
If early data forwarding is enabled allowing UE to select target cell before handover completion, then data loss is reduced and network performance is enhanced, but device complexity increases due to autonomous decision-making requirements
Solution Approach 1:
The network pre-configures the UE with candidate cells and their associated trigger conditions (QoS thresholds, traffic patterns, ML model parameters) before handover is needed. This preliminary configuration reduces the real-time decision complexity at the UE, as it only needs to evaluate predefined conditions against current measurements rather than making complex decisions from scratch
Solution Approach 2:
The patent uses configurable parameters such as QoS thresholds, traffic pattern metrics, and ML model inputs to simplify the UE's decision-making process. By changing and optimizing these parameters, the system balances automation capability with device complexity, allowing efficient autonomous operation without excessive computational burden
4Reliability
If autonomous target cell selection is implemented based on trigger conditions, then data forwarding reliability is improved, but device complexity increases due to capability message transmission and parameter management
Solution Approach 1:
The network provides the UE with a pre-configured list of candidate cells and their associated trigger conditions before autonomous selection is needed. This preliminary provision of information reduces the complexity of capability message transmission and parameter management, as the UE receives structured, predefined data rather than needing to manage complex real-time parameters
Solution Approach 2:
Different candidate cells are configured with different trigger conditions and parameters tailored to their specific characteristics (QoS requirements, traffic patterns, ML model parameters). This local customization allows the UE to make reliable autonomous decisions while keeping the overall system complexity manageable through differentiated, context-specific configurations
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A user equipment (UE) may transmit a capability message indicative of a capability of the UE to perform a target cell selection based on an early data forwarding indication. The UE may transmit a message requesting parameters associated with the conditional handover procedure. The UE may receive a control message indicating an enhanced conditional handover configuration associated with the conditional handover procedure based on the capability message. The enhanced conditional handover configuration may include an indication of one or more candidate cells for which early data forwarding to a target cell prior to the completion of the conditional handover procedure is supported. The UE may perform target cell selection for the conditional handover procedure in accordance with the enhanced conditional handover configuration and based on satisfaction of at least one trigger condition.