Codebook Transmission Method for Accurate C-DAI Generation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In next-generation radio access networks, the generation of counter downlink assignment indicators (C-DAI) and total downlink assignment indicators (T-DAI) is hindered due to differing preparation times for downlink transmissions, making it impossible to accurately generate these indicators when the existence of other downlink transmissions is unknown.
Innovation Solution
A method where the network device determines indication information for downlink transmissions by using a reference occasion offset from the actual occasion, allowing for the accurate generation of C-DAI and T-DAI values by sequencing pairs of frequency domain resources and occasions, ensuring that downlink transmissions at the same reference occasion can be identified and grouped effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network device prepares DCI for downlink transmissions with different preparation times using prior-art sequencing rules, then the C-DAI and T-DAI generation follows standard procedures, but the indicators cannot be accurately generated when the existence of other downlink transmissions is unknown
Solution Approach 1:
The patent applies preliminary action by determining indication information for all downlink transmissions in advance using a reference occasion that is earlier than or equal to the actual occasion. This allows the network device to prepare DCI for multiple transmissions with different preparation times before the actual transmission occurs, ensuring accurate C-DAI and T-DAI generation without needing to know the existence of other transmissions during the preparation process.
Solution Approach 2:
The patent introduces a reference occasion as an intermediary concept to mediate between transmissions with different preparation times. This reference occasion serves as a common reference point that allows the network device to group and sequence transmissions systematically, enabling accurate indicator generation without direct knowledge of all transmission existences at the time of each individual preparation.
2Adaptability or versatility
If the network device uses different preparation times for different downlink transmissions, then the transmissions can be optimized for their specific requirements, but the C-DAI and T-DAI values cannot be accurately generated according to prior-art rules
Solution Approach 1:
By determining indication information in advance using a reference occasion, the patent enables the network device to accommodate different preparation time requirements for various downlink transmissions while still generating precise C-DAI and T-DAI values. The preliminary determination ensures that all transmissions are accounted for in the sequencing before any actual transmission occurs.
Solution Approach 2:
The patent uses a virtual reference occasion structure that can be independently configured for different transmission groups without affecting the actual transmission timing. This disposable reference framework allows flexible adaptation to different preparation time needs while maintaining precise indicator generation through systematic sequencing.
3Ease of operation
If the network device sequences downlink transmissions in ascending order of serving cell index, then the C-DAI values can be generated according to prior-art rules, but transmissions at the same reference occasion cannot be effectively identified and grouped
Solution Approach 1:
The patent segments the downlink transmissions into distinct groups based on their reference occasions while maintaining the ascending order of serving cell index within each group. This segmentation allows the network device to preserve the simplicity of sequential C-DAI generation while simultaneously maintaining the grouping information of transmissions at the same reference occasion through the structured indication information determination process.
Solution Approach 2:
The patent adds a new dimension of reference occasion grouping to the traditional one-dimensional sequencing by serving cell index. This multi-dimensional approach allows transmissions to be organized both by reference occasion (time dimension) and by serving cell index (frequency dimension), preserving both the simplicity of sequential generation and the integrity of reference occasion grouping information.
Data Source
Figure 1~2
Figure 3~4
Figure 5a~5b
AI summary
This application discloses a codebook transmission method, an apparatus, and a system. For one target downlink transmission in at least one downlink transmission sent by a network device, the following operations are performed: obtaining an actual occasion corresponding to the target downlink transmission, and obtaining a reference occasion corresponding to the target downlink transmission by offsetting the actual occasion by an occasion offset value; defining a pair corresponding to the target downlink transmission, where the pair is a pair between the frequency domain resource corresponding to the target downlink transmission and the reference occasion corresponding to the target downlink transmission; and determining, based on the obtained pair corresponding to the at least one downlink transmission, indication information corresponding to the at least one downlink transmission. The indication information is determined based on a reference occasion corresponding to a downlink transmission, and indication information corresponding to downlink transmissions at a same reference occasion can be generated in a same time period. Therefore, during preparation of indication information corresponding to one downlink transmission, existence of another downlink transmission may be known, and therefore indication information corresponding to the downlink transmission may be effectively generated.