CBG Multi-Slot Transmission for Low-Overhead Large TB Retransmission
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting large packet sizes over multiple slots while minimizing DCI signaling overhead and enabling fast retransmissions for high-reliability applications like XR and Cloud Gaming.
Innovation Solution
Implementing a CBG-based multiple slot transmission scheme, where a TB is split into code block groups (CBGs) and scheduled across multiple slots, using high-layer signaling and DCI to indicate CBG information, reducing DCI overhead and enabling efficient retransmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a transmission block is transmitted over multiple slots using conventional methods, then the transmission can accommodate large packet sizes, but the DCI signaling overhead increases and retransmission efficiency decreases
Solution Approach 1:
The transmission block is segmented into code block groups (CBGs) that can be independently controlled and transmitted over multiple slots. This segmentation allows the system to handle large packets by dividing them into manageable units, each with its own CBG indication in the DCI, thereby reducing overall signaling overhead compared to treating the entire packet as a single unit.
2Reliability
If conventional transmission methods are used for large packets over multiple slots, then the transmission can complete data transfer, but retransmission resources are wasted and reliability decreases
Solution Approach 1:
Different code block groups within the transmission block are assigned different qualities of service through independent CBG indication. This allows the system to identify which specific CBGs need retransmission based on their individual reception status, rather than retransmitting the entire transmission block, thereby improving retransmission efficiency and reducing resource waste.
3Productivity
If CBG-based multiple slot transmission is implemented, then resource utilization improves and retransmission efficiency increases, but the system complexity and signaling configuration requirements increase
Solution Approach 1:
The CBG indication mechanism serves multiple functions: it identifies which CBGs are transmitted in each slot, indicates retransmission requirements, and enables flexible resource allocation across multiple slots. This multi-functionality reduces the need for separate signaling mechanisms, thereby managing system complexity while improving resource utilization and productivity.
Data Source
AI summary
A wireless communication method is disclosed. The method comprises receiving, by a wireless communication terminal from a wireless communication node, configuration signaling comprising configuration information for a transmission block, TB, transmitted over multiple slots; receiving, by the wireless communication terminal from the wireless communication node, control signaling comprising a code block group, CBG, information indication; and receiving, by the wireless communication terminal from the wireless communication node, the TB according to the configuration information and the CBG information indication.