Multi-TRP Configuration Using Terminal Timing Capability Limits
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Solution Overview
Problem
In New Radio MIMO systems with multi-TRP configuration, symbol overlap due to the network device can cause inter-symbol interference due to varying mobility, which affects communication quality.
Innovation Solution
The solution involves determining a TRP configuration based on the reported maximum uplink timing difference supported by the terminal, or the maximum timing advance supported by the terminal, or the maximum timing advance supported by the terminal, or the maximum timing advance supported by the terminal, or the maximum TA value difference supported by the terminal, to avoid inter-symbol interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple TRPs are configured for the terminal to enable multi-DCI multi-TRP operation, then the system can achieve diverse transmission paths and improve communication reliability, but symbol overlap occurs between different TRP paths causing inter-symbol interference and degrading communication quality
Solution Approach 1:
The network device performs preliminary action by obtaining capability information from the terminal before configuring multiple TRPs. This capability information includes the maximum uplink timing difference or maximum TA value difference that the terminal can support. Based on this pre-obtained information, the network device determines appropriate TRP configurations that will not cause inter-symbol interference, thereby enabling multi-TRP operation while preventing the harmful effect from occurring in the first place
2Adaptability or versatility
If the terminal moves causing TA values for configured TRPs to change, then the system can adapt to changing propagation conditions, but when the absolute difference between changed TA values exceeds the cyclic prefix, symbol overlap occurs causing inter-symbol interference
Solution Approach 1:
The system implements feedback through the terminal reporting its capability information (maximum uplink timing difference or maximum TA value difference) to the network device. The network device uses this feedback to determine TRP configurations that respect the terminal's timing capabilities. When the terminal moves and TA values change, the network device can detect these changes and adjust configurations accordingly, ensuring that the absolute difference between TA values never exceeds the cyclic prefix length, thus preventing inter-symbol interference while maintaining adaptability to mobility
Data Source
AI summary
A method for configuring a transmission and reception point (TRP) includes: receiving, by a network device and from a terminal, capability information, where the capability information includes at least one of: a maximum uplink timing difference supported by the terminal, or a maximum timing advance (TA) value difference supported by the terminal; and determining a TRP configuration for the terminal based on the capability information.