CHO and CPAC Resource Mapping for Reliable PSCell Handover
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Solution Overview
Problem
Existing handover mechanisms in wireless communication systems lack efficiency and reliability, particularly in supporting conditional handover (CHO) and conditional PSCell addition/change (CPAC), which are crucial for improving system throughput and robustness.
Innovation Solution
A method and electronic device for managing CHO+CPAC handover by configuring candidate PCells and PSCells with associated MCG and SCG resources, using ID information to ensure correct association and resource allocation, and optimizing the handover process through configuration information indication, update, and execution methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing handover mechanisms are used, then basic handover functionality is maintained, but handover efficiency and reliability are insufficient
Solution Approach 1:
The patent implements conditional handover by pre-configuring multiple candidate target cells and their associated resources (MCG and SCG) before handover is actually needed. The source base station sends handover request messages to candidate target base stations in advance, preparing configuration information that will be used when handover conditions are met, thereby improving both reliability and efficiency of the handover process
Solution Approach 2:
The patent segments the handover process into distinct phases: configuration phase (preparing candidate cells and resources), execution phase (actual handover when conditions are met), and resource management phase (managing MCG and SCG resources separately). This segmentation allows for more efficient and reliable handover by preparing components independently and executing only when necessary
2Reliability
If conditional handover and CPAC are supported, then system robustness improves, but system complexity increases
Solution Approach 1:
The patent introduces an intermediary mechanism where the source base station acts as a coordinator, managing the configuration and selection of candidate target cells. The source base station sends handover request messages to multiple candidate target base stations and manages the association between MCG and SCG resources, thereby reducing the complexity burden on individual base stations and UEs while improving overall system robustness
Solution Approach 2:
By pre-configuring candidate target cells and their resources before handover execution, the system prepares all necessary components in advance. This preliminary action reduces the complexity of real-time decision-making during handover execution, as the configuration work has already been performed and validated
3Productivity
If multiple candidate PSCells are prepared, then handover performance optimizes, but resource allocation complexity increases
Solution Approach 1:
The patent segments resource allocation into separate MCG (Master Cell Group) and SCG (Secondary Cell Group) resources, each managed independently but associated through configuration information. This segmentation allows for more efficient resource allocation and reduces complexity by handling resource management in modular units rather than as a monolithic system
Solution Approach 2:
The system implements feedback mechanisms where configuration information is exchanged between source and target base stations, and where handover execution feedback is provided to update resource allocation. This feedback loop allows the system to optimize resource allocation based on actual handover outcomes and system state, improving handover performance while managing complexity through adaptive resource management
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method executed of a first node in a wireless communication system is provided. The method comprise receiving a handover request message from a third node, wherein the handover request message includes at least one of conditional handover (CHO) trigger indication information and information indicating the maximum number of primary secondary cell group (SCG) cells (PSCells) to prepare, and transmitting a first message to a second node, wherein the first message includes at least one of a candidate PCell ID or a configuration ID and the information indicating the maximum number of PSCells to prepare.