Terminal Reference Signal Trigger Prioritization in CoMP Transmission
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Solution Overview
Problem
In coordinated multi-point (CoMP) transmission scenarios, terminals receive multiple pieces of trigger information for the same type of reference signal, leading to ambiguity on how to process these signals, which affects system performance.
Innovation Solution
A method for a terminal to determine valid trigger information from multiple pieces of DCI, prioritizing one trigger information over others, ensuring coherent processing of reference signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple network devices send DCI with trigger information independently, then the throughput of cell-edge terminal is improved, but the terminal processing complexity increases due to receiving multiple trigger information of the same type
Solution Approach 1:
The patent applies local quality by differentiating the processing of trigger information based on its source. The terminal identifies whether trigger information comes from a serving cell or a coordinated cell, and applies different processing rules accordingly. This resolves the contradiction by providing specialized handling for each type of trigger information while maintaining the benefits of multi-point transmission.
Solution Approach 2:
Instead of having the terminal actively resolve conflicts between multiple trigger information pieces, the patent inverts the approach by having the network device prevent conflicts from arising. The serving cell's DCI is configured to not include SRS trigger information when coordinated cells are sending trigger information, thereby eliminating the need for complex terminal-side conflict resolution.
2Adaptability or versatility
If the terminal receives multiple pieces of trigger information for the same reference signal type, then the coordinated multi-point transmission capability is enhanced, but the system performance deteriorates due to processing ambiguity
Solution Approach 1:
The patent applies local quality by differentiating the processing of trigger information based on its source. The terminal identifies whether trigger information comes from a serving cell or a coordinated cell, and applies different processing rules accordingly. This resolves the contradiction by providing specialized handling for each type of trigger information while maintaining the benefits of multi-point transmission.
Solution Approach 2:
The patent introduces an intermediary mechanism through the SRS-TriggerOffset parameter. This parameter acts as a mediator that coordinates the timing between trigger information from different network devices, ensuring that the terminal can process multiple trigger information pieces without ambiguity. The offset parameter reconciles potential conflicts by providing a clear temporal reference for processing.
Data Source
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AI summary
This application provides a transmission method, a terminal, and a network device, so that when the terminal receives a plurality of pieces of first trigger information, sending processing of a first reference signal is performed. Therefore, a prior-art problem that after receiving a plurality of pieces of trigger information, a terminal has a different understanding of sending processing of a reference signal is resolved, and system performance can be improved. The method includes: receiving, by a terminal, a plurality of pieces of downlink control information DCI, where the DCI includes at least first trigger information that is in a one-to-one correspondence with the DCI, and the first trigger information is used to indicate, to the terminal, a resource used by a first reference signal and/or sending processing of the first reference signal; determining, by the terminal, target first trigger information from a plurality of pieces of first trigger information; and performing, by the terminal based on the target first trigger information, sending processing on the first reference signal.