One Shot HARQ Feedback Reporting in Wireless Networks
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Solution Overview
Problem
In wireless communications networks, there is a limited amount of bandwidth for communicating Hybrid Automatic Repeat Request (HARQ) feedback, which can lead to inefficiencies in data transmission.
Innovation Solution
The implementation of one shot HARQ feedback reporting methods, where user equipment (UE) transmits a configuration for a one shot HARQ feedback request, including options such as a one shot HARQ feedback request bit field in sidelink control information (SCI), a destination identifier, a cast type indicator, or a bitmap indicating HARQ processes, to efficiently manage HARQ feedback reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional HARQ feedback reporting is used, then all HARQ processes are reported, but bandwidth consumption increases
Solution Approach 1:
The patent segments the HARQ feedback reporting by introducing a subset indication mechanism that divides all HARQ processes into multiple subsets. The UE can selectively report feedback for specific subsets of HARQ processes rather than all processes, thereby reducing bandwidth consumption while maintaining necessary feedback reliability for critical processes.
Solution Approach 2:
The patent implements partial action by allowing the UE to report HARQ feedback for only a subset of HARQ processes when bandwidth is constrained. The subset indication field enables selective reporting of essential feedback information, avoiding the excessive bandwidth consumption of reporting all HARQ processes while maintaining sufficient reliability for ongoing communications.
2Productivity
If subset HARQ feedback reporting is implemented, then bandwidth utilization improves, but feedback reporting complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the subset indication mechanism and HARQ process grouping before feedback reporting occurs. The network and UE establish the subset structure in advance through configuration messages, so that when feedback is needed, the UE can efficiently select and report appropriate subsets without complex real-time decision-making, thus improving bandwidth utilization while limiting complexity increase.
3Productivity
If one shot HARQ feedback request is transmitted, then feedback reporting efficiency improves, but configuration overhead increases
Solution Approach 1:
The patent merges the one shot HARQ feedback request with existing control signaling structures. The feedback request is integrated into uplink control information or data channels that are already being transmitted, combining multiple functions (feedback request, data transmission, control signaling) into a single transmission event. This improves feedback reporting efficiency while minimizing additional configuration overhead by utilizing existing signaling resources.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for one shot hybrid automatic repeat request feedback reporting. One method includes transmitting, from a user equipment (“UE”), a configuration for a one shot hybrid automatic repeat request (“HARQ”) feedback request to at least one receiver. The method includes configuring one shot HARQ feedback including one or more of a one shot HARQ feedback request bit field in sidelink control information (“SCI’), a destination identifier (“ID”), a cast type indicator, or a bitmap containing HARQ processes. The method includes receiving the one shot HARQ feedback report associated with a subset of HARQ processes of a plurality of HARQ processes and based at least in part on a cast type and a groupcast HARQ feedback.