Code Block Group Configuration for PDSCH Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current wireless communication systems face limitations in efficiently controlling downlink and uplink transmissions, particularly in terms of flexibility and efficiency, especially with the increasing demand for services like eMBB, URLLC, and eMTC, where the detailed design of procedures for efficient control of code block group-based transmissions has not been adequately studied.
Innovation Solution
The implementation of a procedure that configures the maximum number of code block groups per transport block, using specific downlink control information formats to determine transport block size and manage code block group transmissions, including preemption indications and HARQ combining, to enhance the control and efficiency of downlink and uplink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If code block group-based transmissions are implemented to improve transmission efficiency, then productivity is improved, but device complexity increases due to the need for detailed procedures and signaling
Solution Approach 1:
The patent segments the transmission block into multiple code block groups (CBGs), allowing independent handling and retransmission of individual CBGs rather than treating the entire transport block as a single unit. This segmentation enables more granular control and improves efficiency by retransmitting only failed CBGs.
Solution Approach 2:
The patent introduces dynamic signaling mechanisms where the number of CBGs and their configurations can be adjusted based on transmission conditions. The base station can dynamically indicate which CBGs require retransmission through downlink control information, allowing adaptive optimization of transmission efficiency.
2Adaptability or versatility
If the maximum number of code block groups per transport block is configured to increase flexibility, then adaptability is improved, but device complexity increases due to additional configuration parameters
Solution Approach 1:
The patent establishes preliminary configuration of the maximum number of CBGs per transport block through higher-layer signaling before actual transmissions occur. This pre-configuration allows the system to be prepared for flexible CBG-based operations without requiring complex real-time decision-making, reducing operational complexity.
Solution Approach 2:
The patent enables flexibility by allowing the maximum number of CBGs to be configured as a variable parameter rather than a fixed value. This parameter can be adjusted based on service requirements, channel conditions, and device capabilities, providing adaptability while maintaining manageable complexity through standardized configuration procedures.
3Reliability
If detailed procedures for code block group management are implemented to improve communication performance, then reliability is improved, but ease of operation deteriorates due to increased signaling overhead
Solution Approach 1:
The patent extracts the retransmission control logic from the overall transmission procedure by introducing separate CBG-specific signaling. Instead of retransmitting entire transport blocks, the system extracts and retransmits only the specific CBGs that failed, reducing the amount of data that needs to be retransmitted and improving reliability efficiently.
Solution Approach 2:
The patent implements feedback mechanisms where the receiver sends acknowledgment information about which CBGs were successfully decoded and which require retransmission. This feedback enables the transmitter to selectively retransmit only the necessary CBGs, improving communication reliability while optimizing the use of signaling resources.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A user equipment (UE) is described that communicates with a base station apparatus on serving cells having a primary cell and one or more secondary cells. The UE includes receiving circuitry configured to receive, a radio resource control (RRC) message including first information configuring a code block group (CGB) based transmission for a physical downlink shared channel (PDSCH). The receiving circuitry is also configured to receive, a RRC message including second information configuring a maximum number of CBGs per transport block. The UE includes processing circuitry configured to determine the number of bits for CBG transmission information comprised in a first downlink control information (DCI) format, wherein the first DCI format is used for scheduling of the PDSCH. In a case that the first information is configured, the number of bits for the CBG transmission information comprised in the first DCI format may be determined based on the second information.