5G UE Preempted Data Reception via CBG Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G communication systems, when a URLLC service preempts an eMBB service, there is a challenge in efficiently transmitting the preempted eMBB data, as existing methods do not effectively handle the preempted transmission resource location and HARQ feedback for accurate retransmission.
Innovation Solution
The method involves receiving scheduling information in the scheduling control data to identify the transmission resource location of preempted service data, allowing for the accurate transmission and HARQ feedback of the preempted data, enabling efficient retransmission by the UE.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If URLLC service preempts eMBB service transmission resources, then URLLC service latency is reduced, but eMBB data transmission reliability deteriorates
Solution Approach 1:
The patent segments the transmission block into multiple codeblock groups (CBGs) and provides individual HARQ feedback for each CBG. This allows selective retransmission of only the preempted CBGs rather than retransmitting the entire TB, thereby maintaining eMBB transmission reliability while accommodating URLLC preemption.
Solution Approach 2:
The patent implements HARQ feedback mechanism where the UE sends acknowledgment (ACK) or negative acknowledgment (NACK) for each CBG to the base station. This feedback enables the base station to identify which CBGs were successfully received and which need retransmission, ensuring reliable eMBB data delivery even when resources are preempted by URLLC services.
2Measurement precision
If HARQ feedback is performed in units of Transmission Blocks, then retransmission accuracy is improved, but retransmission efficiency deteriorates when only partial data is lost
Solution Approach 1:
The patent divides the transmission block into multiple codeblock groups (CBGs) and implements HARQ feedback at the CBG level rather than at the TB level. This segmentation allows the system to identify and retransmit only the specific CBGs that contain errors, improving retransmission efficiency while maintaining accuracy through precise error identification.
Solution Approach 2:
The patent applies different treatment to different CBGs based on their individual reception status. Successfully received CBGs are acknowledged with ACK and do not require retransmission, while failed CBGs receive NACK and are scheduled for retransmission. This local quality approach optimizes retransmission efficiency by avoiding unnecessary retransmission of intact data segments.
3Device complexity
If scheduling information for preempted data is not provided, then system complexity is reduced, but the ability to transmit preempted eMBB data deteriorates
Solution Approach 1:
The patent incorporates scheduling information for preempted eMBB data in advance within the downlink control information (DCI). This preliminary action provides the UE with the necessary scheduling details before the actual data transmission, enabling the UE to properly receive and process preempted data without increasing overall system complexity.
Solution Approach 2:
The patent uses downlink control information (DCI) as an intermediary to convey scheduling information for preempted eMBB data. This intermediary mechanism efficiently communicates the necessary scheduling details to the UE without requiring complex direct negotiation or additional signaling protocols, thus maintaining system simplicity while enabling preempted data transmission.
Data Source
Figure 1~2A
Figure 2B
Figure 3~4
AI summary
The present disclosure provides a method and an apparatus of data transmission, user equipment, a base station and a computer-readable storage medium. The method of data transmission includes: a transmission of service data sent by a base station is received, where scheduling control data on the transmission of the service data carries scheduling information of service data for which a transmission resource is preempted; and the service data for which the transmission resource is preempted is received according to the scheduling information. According to examples of the present disclosure, the service data for which the transmission resource is preempted is received according to the scheduling information carried in the scheduling control data on the received transmission of the service data, thereby implementing transmission of the service data for which the transmission resource is preempted.