Downlink Control Signaling Coding Block Group Indication
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Solution Overview
Problem
In 5G NR systems, dynamically indicating the number of coding block groups in downlink control signaling is challenging, which affects transmission efficiency and flexibility.
Innovation Solution
The method involves a downlink control signaling with two information domains: one indicating whether a transport block is new and another indicating the scheduled coding block group, allowing terminals to determine the number of coding block groups in the new transport block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If coding block group based feedback and retransmission is supported to improve transmission efficiency, then transmission efficiency is improved, but the complexity of dynamically indicating the number of coding block groups in downlink control signaling increases
Solution Approach 1:
The patent segments the transport block into multiple coding block groups (CBGs), allowing selective retransmission of only the failed CBGs rather than the entire transport block. This segmentation enables finer-grained feedback and retransmission control, improving transmission efficiency by reducing unnecessary retransmissions of successfully decoded portions.
Solution Approach 2:
The patent introduces dynamic indication of the number of CBGs in downlink control signaling, allowing the network to flexibly configure the CBG structure based on channel conditions and transmission requirements. This dynamic adaptation enables the system to optimize transmission efficiency for different scenarios while managing the signaling complexity through configurable parameters.
2Adaptability or versatility
If the number of coding block groups is dynamically indicated in downlink control signaling, then transmission flexibility is improved, but the overhead of uplink control signaling increases
Solution Approach 1:
The patent performs preliminary indication of the number of CBGs in the downlink control signaling before the actual data transmission. This preliminary configuration allows the terminal to prepare the appropriate feedback structure in advance, enabling efficient uplink feedback with reduced overhead by avoiding unnecessary signaling bits for scenarios where the CBG structure is pre-configured.
Solution Approach 2:
The patent utilizes parameter changes in the downlink control signaling to dynamically indicate the number of CBGs. By encoding this information through modifications of existing signaling parameters rather than adding separate dedicated fields, the system achieves transmission flexibility while minimizing the increase in uplink control signaling overhead.
Data Source
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AI summary
Embodiments of the present invention disclose a data indicating method and related products, including: receiving, by a terminal, a downlink control signaling from a network side device, where the downlink control signaling includes a first information domain and a second information domain, the first information domain is configured to indicate whether a transport block scheduled by the downlink control signaling is a new transport block, and the second information domain is configured to indicate a coding block group scheduled by the downlink control signaling; determining, by the terminal, a number of coding block groups included in the new transport block according to the first information domain and the second information domain. The embodiments of the invention is beneficial to determine a number of bits of an uplink control signaling that is fed back and reduce an uplink control signaling overhead.