DCI Detection Using CORESET Pool Index for Multi-TRP Scheduling
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Solution Overview
Problem
In New Radio (NR) systems, terminal devices face challenges in effectively transmitting signals due to unclear scheduling manners indicated by information indication fields in downlink control information (DCI), as the lengths and contents of these fields differ between single-TRP and multiple-TRP scheduling scenarios, leading to inefficient signal transmission.
Innovation Solution
A method where a terminal device determines the number of bits and information content of target information indication fields in DCI based on CORESET pool index configurations, enabling accurate detection and transmission of signals according to the indicated content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple scheduling manners (single-TRP and multiple-TRP) are supported in DCI, then system flexibility and adaptability are improved, but terminal device complexity increases because the terminal cannot determine which scheduling manner is adopted and must handle multiple possible information field configurations
Solution Approach 1:
The patent applies local quality by making the information indication field configuration dependent on the CORESET pool index value. When the CORESET pool index is 0, one configuration is used; when it is 1, a different configuration is used. This allows different parts of the system (different CORESET pools) to have different field configurations, enabling support for multiple scheduling manners while keeping the terminal's processing logic relatively simple by using the CORESET pool index as a discriminator.
2Measurement precision
If information indication fields have different lengths and contents for different scheduling manners, then scheduling precision is improved, but signal transmission efficiency deteriorates because the terminal cannot effectively transmit signals without knowing which scheduling manner is adopted
Solution Approach 1:
The patent applies preliminary action by pre-configuring the terminal with multiple possible information indication field configurations corresponding to different scheduling manners. The terminal is provided with configuration information indicating different field lengths and contents in advance, and can select the appropriate configuration based on the detected CORESET pool index value before actual signal transmission occurs, thus avoiding delays and improving transmission efficiency.
3Adaptability or versatility
If the terminal supports both single-TRP and multiple-TRP scheduling with different information field configurations, then system versatility is improved, but detection complexity increases as the terminal must handle multiple possible DCI formats
Solution Approach 1:
The patent uses the CORESET pool index as a local discriminator to determine which information indication field configuration to apply. By tying the field configuration to the specific value of the CORESET pool index (0 or 1), the patent creates a clear local rule that simplifies the detection process - the terminal only needs to check the CORESET pool index value to determine the appropriate DCI format, rather than having to analyze and distinguish between multiple possible formats in a more complex manner.
Data Source
AI summary
Provided are a downlink signal transmission method and device, which can improve signal transmission performance. The method includes: a terminal device determines the number of bits of a target information indication field in the DCI and/or the information content indicated by the target information indication field according to the configuration of CORESET group index; the terminal device transmits or receives signals scheduled by the DCI based on the number of bits of the target information indication field and/or the information content indicated by the target information indication field.