SSB Measurement Grouping for Flexible Cell Handover
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Solution Overview
Problem
The challenge in Release 18 (Rel-18) LTM is the lack of defined measurement and reporting methods for terminal equipment during cell handover, particularly for inter-cell beam management (ICBM), which is necessary for reducing handover latency and enabling flexible cell handover without increasing reporting overhead.
Innovation Solution
The proposed solution involves configuring terminal equipment with K list groups, each containing an SSB index list and a cell index list, and transmitting R groups of reporting information including L1-RSRP and SSBRIs or L1-SINRs and SSBRIs, to facilitate flexible measurement and reporting configurations for SSBs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the terminal equipment performs measurement and reporting for multiple candidate cells in Rel-18 LTM, then the handover flexibility and speed are improved, but the reporting overhead and system complexity increase
Solution Approach 1:
The patent segments the measurement and reporting process by introducing K list groups, where each group contains an SSB index list and a cell index list. This segmentation allows the terminal equipment to measure and report multiple candidate cells in an organized manner, improving handover flexibility while managing reporting overhead through structured grouping.
Solution Approach 2:
The patent applies preliminary action by pre-configuring the terminal equipment with measurement configuration information including K list groups before handover. The terminal equipment performs SSB measurements on candidate cells based on these pre-configured lists, and the network device pre-prepares TCI state indications. This preliminary preparation reduces handover latency and enables faster cell handover without increasing real-time reporting overhead.
2Adaptability or versatility
If the network device configures multiple TCI states for inter-cell beam management, then the beam flexibility is improved, but the configuration complexity increases
Solution Approach 1:
The patent applies universality by using a unified TCI framework that can serve multiple purposes: intra-cell beam management, inter-cell beam management (ICBM), and preparation for cell handover. The TCI state indications are configured in a unified manner that covers both serving cell and non-serving cell scenarios, reducing configuration complexity while maintaining beam flexibility across different operational modes.
Solution Approach 2:
The patent introduces dynamic adaptability through the K list groups configuration, where the network device can dynamically adjust which candidate cells are included in each list group based on terminal equipment capabilities and network conditions. This dynamic configuration allows the system to adapt beam management strategies without requiring complex static configurations for all possible scenarios.
Data Source
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AI summary
Embodiments of this disclosure provide an information processing method and apparatus. A terminal equipment receives first configuration information, the first configuration information including one or more list groups, and one list group including an SSB index list and a cell index list. Hence, the terminal equipment may perform SSB measurement according to the first configuration information, thereby achieving flexible measurement configurations, which is helpful to flexible cell handover.