Base Station Group Acknowledgement Bitmap for Uplink Detection
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Solution Overview
Problem
In LTE systems, base stations face challenges in accurately detecting uplink data transmission from user equipment (UE), leading to erroneous determination of data transmission situations due to missed detections, resulting in the failure to provide acknowledgement messages.
Innovation Solution
A method where the base station detects data transmission from each UE in an acknowledgement group, generates and sends first- and second-level acknowledgement indication messages to indicate data presence or absence, and provides feedback on data check results, using bitmap or index-based messages to ensure timely acknowledgement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station uses traditional acknowledgement feedback method for each UE individually, then the acknowledgement accuracy for each UE is maintained, but the feedback overhead and system complexity increase significantly when multiple UEs transmit data simultaneously
Solution Approach 1:
The patent combines multiple individual acknowledgement feedback processes into a single group-based feedback mechanism. UEs are divided into acknowledgment groups, and the base station generates one group-level acknowledgement message containing bitmap information that indicates the detection status of multiple UEs simultaneously. This merging approach maintains acknowledgement accuracy for each UE while significantly reducing feedback overhead and system complexity.
Solution Approach 2:
The patent segments the UE population into multiple acknowledgment groups, where each group is managed separately with its own feedback mechanism. This segmentation allows the system to handle multiple UEs efficiently by processing them in manageable groups rather than individually, reducing the overall feedback complexity while maintaining reliability within each group.
2Device complexity
If the base station misses detecting uplink data transmitted by UE, then the detection process is simplified, but erroneous determination of data transmission situation occurs
Solution Approach 1:
The patent implements a feedback mechanism where the base station generates acknowledgement messages based on detection results and sends them to UEs. The acknowledgement messages contain bitmap information that provides feedback on whether data was successfully detected. This feedback loop allows the system to maintain simple detection processes while ensuring accurate determination of data transmission situations through the acknowledgement feedback.
3Loss of time
If the base station provides individual acknowledgement feedback to each UE, then the acknowledgement timeliness for each UE is ensured, but the feedback overhead increases when multiple UEs transmit simultaneously
Solution Approach 1:
The patent merges individual acknowledgement feedback into group-level feedback messages. By combining multiple acknowledgement indications into a single group acknowledgment message with bitmap information, the system reduces feedback overhead significantly while maintaining timely acknowledgement for all UEs in the group. The bitmap efficiently encodes the detection status of multiple UEs in a compact format.
Data Source
AI summary
Embodiments of the present invention disclose an acknowledgement indication method for data transmission and a related device. The method includes: detecting, by a base station, whether each user equipment (UE) in an acknowledgement group transmits data, to obtain a detection result; generating, by the base station, an acknowledgement indication message according to the detection result, where the acknowledgement indication message indicates a flag bit status corresponding to each UE in the acknowledgement group, the flag bit status includes a first state or a second state, the first state indicates that the base station finds data, and the second state indicates that the base station does not find data; and sending, by the base station, the acknowledgement indication message.