Communication Handover Channel Measurement for Target-Cell Scheduling
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Solution Overview
Problem
Existing communication systems face challenges in significantly improving data transmission capacity between a terminal device and a target cell after a cell handover, as current beam direction alignment methods are insufficient.
Innovation Solution
The terminal device measures downlink channel states of candidate cells in advance based on indication information from the access network device, sending relevant channel state information to the target cell's access network device to optimize resource usage post-handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the terminal device performs beam direction alignment immediately after handover, then the beam direction accuracy is improved, but the data transmission capacity cannot be significantly improved
Solution Approach 1:
The terminal device measures downlink channel states of candidate cells in advance before handover occurs. The access network device provides indication information for candidate cells, and the terminal device completes channel state measurements beforehand, so that after handover the channel state information is ready for immediate use, enabling both accurate beam alignment and improved data transmission capacity
Solution Approach 2:
The terminal device sends measured downlink channel state information back to the target cell's access network device after handover. This feedback mechanism allows the access network device to perform accurate scheduling based on real channel conditions, thereby significantly improving data transmission capacity while maintaining beam direction accuracy
2Productivity
If the terminal device measures downlink channel states in advance, then the data transmission capacity is improved, but the signaling overhead increases
Solution Approach 1:
The access network device provides indication information for candidate cells in advance, and the terminal device completes channel state measurements beforehand. This preliminary action ensures that after handover, the channel state information is ready for immediate use, improving data transmission capacity without requiring additional measurement time that would increase signaling overhead
Solution Approach 2:
The downlink channel state measurements serve multiple purposes: they enable accurate beam direction alignment and provide channel state information for data transmission scheduling. By making the measurements serve dual functions, the system improves data transmission capacity without proportionally increasing signaling overhead
Data Source
AI summary
This application relates to communication methods, apparatuses, and systems. In an example method, a terminal device may receive first indication information from a first access network device on a radio resource of a source cell, where the first indication information indicates the terminal device to measure a downlink channel state for a downlink reference signal of at least one candidate cell; receive second indication information from the first access network device, where the second indication information indicates the terminal device to perform a handover from the source cell to a target cell; and send uplink information to a second access network device on a radio resource of the target cell, where the uplink information includes downlink channel state information of the target cell.