Cell Handover via TCI State Switching to Reduce Delay
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Solution Overview
Problem
Existing mobile communication systems face challenges in reducing handover delay during cell handover processes, which can lead to disruptions in communication and service quality.
Innovation Solution
A method for cell handover that involves receiving first indication information and performing a handover action by switching the Transmission Configuration Indication (TCI) state, allowing for efficient handover between cells without the need for re-establishing protocol stacks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cell handover procedure is used, then communication continuity can be maintained, but handover delay increases and service quality deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring the target cell's TCI state before the actual handover occurs. The network device configures the TCI state in advance, and the terminal can directly switch to the pre-configured TCI state upon receiving the handover indication, eliminating the need for real-time protocol stack re-establishment and significantly reducing handover delay while maintaining communication continuity.
Solution Approach 2:
The patent utilizes parameter changes by focusing on modifying the TCI state parameter during handover. Instead of performing complete protocol stack re-establishment, the system changes only the critical TCI state parameter to switch between source and target cells. This selective parameter change enables rapid handover while preserving most configuration settings, thus reducing handover delay without compromising communication reliability.
2Reliability
If protocol stacks are re-established during handover, then communication can be maintained, but handover process becomes more complex and time-consuming
Solution Approach 1:
The patent extracts the essential function of handover from the complete protocol stack re-establishment process. By identifying and extracting only the critical TCI state switching operation, the system maintains communication functionality while removing unnecessary complex protocol re-establishment steps. This extraction simplifies the handover process to a straightforward TCI state change, reducing both complexity and time consumption.
Solution Approach 2:
The patent applies segmentation by dividing the handover process into distinct phases: TCI state configuration phase (pre-handover), TCI state switching phase (during handover), and communication continuation phase (post-handover). This segmentation isolates the critical TCI state change from the broader protocol stack operations, enabling simplified handover execution while maintaining communication reliability without requiring full protocol re-establishment.
Data Source
AI summary
Provided is a method for cell handover. The method for cell handover is applicable to a terminal. The method for cell handover includes: receiving first indication information; and performing a handover action based on the first indication information, wherein the handover action comprises switching a transmission configuration indication (TCI) state.