Simultaneous CHO and CPAC Trigger Optimization
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Solution Overview
Problem
Existing wireless communication systems face challenges in optimizing simultaneous conditional reconfiguration of primary cells (PCells) and primary secondary cells (PSCells) for user equipment (UE), due to limitations in configuring CHO and CPA/CPC features simultaneously.
Innovation Solution
A method and electronic device for optimizing simultaneous conditional reconfiguration of PCells and PSCells, by receiving a radio resource control (RRC) reconfiguration message with CHO and CPAC commands, storing reports capturing metrics related to the reconfiguration, and transmitting these reports to the base station for optimizing the conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CHO and CPA/CPC are configured simultaneously in the same conditional reconfiguration message, then the effectiveness and robustness of handover are improved, but the complexity of configuration and evaluation increases
Solution Approach 1:
The patent segments the conditional reconfiguration configuration into distinct CHO configuration and CPAC configuration parts within the same message. The UE separately evaluates CHO trigger conditions and CPAC trigger conditions independently, allowing complex simultaneous configuration to be managed through structured segmentation of evaluation logic.
Solution Approach 2:
The network pre-configures multiple candidate cells for both CHO and CPAC with their respective trigger conditions before handover execution. The UE performs preliminary evaluation of these pre-configured conditions during the waiting period, preparing for potential handover scenarios in advance.
2Reliability
If multiple candidate cells are provided for both CHO and CPAC, then handover robustness is enhanced, but the time required for evaluation and decision-making increases
Solution Approach 1:
The UE performs periodic evaluation of trigger conditions for multiple candidate cells during the waiting period. The system uses timers and periodic measurement reporting to structure the evaluation process, allowing the UE to assess conditions at regular intervals rather than continuously, reducing overall evaluation time while maintaining robustness.
Solution Approach 2:
The UE evaluates trigger conditions for multiple candidate cells but executes handover to the first cell that satisfies its conditions, without waiting to evaluate all candidates exhaustively. This partial evaluation approach reduces time loss while still providing robustness through multiple pre-configured options.
3Measurement precision
If detailed metrics and reports are collected during simultaneous CHO and CPAC evaluation, then network optimization capability is improved, but the processing load and signaling overhead increase
Solution Approach 1:
The system implements feedback mechanisms where the UE collects detailed metrics including successful and failure events, timings, and SON/MDT parameters during simultaneous CHO and CPAC evaluation. These measurements are reported to the network in UEInformationResponse messages, enabling the network to optimize trigger conditions and reconfiguration parameters based on actual field performance data.
Data Source
AI summary
A method for optimizing simultaneous conditional reconfiguration of a primary cell (PCell) and a primary secondary cell (PSCell) for a user equipment (UE), includes: receiving, from a base station, a radio resource control (RRC) reconfiguration message comprising a conditional handover (CHO) command and a conditional PSCell addition or change (CPAC) command for performing a reconfiguration of the PCell and a reconfiguration of the PSCell, simultaneously, wherein the CHO command comprises one or more first conditions to trigger the reconfiguration of the PCell, and wherein the CPAC command comprises one or more second conditions to trigger the reconfiguration of the PSCell; storing one or more reports capturing one or more metrics related to the simultaneous conditional reconfiguration of the PCell and the PSCell upon receiving the RRC reconfiguration message; and transmitting, to the base station, the one or more reports for optimizing the one or more first conditions and the one or more second conditions.