Groupcast HARQ Feedback Permission Mechanism
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Solution Overview
Problem
Existing communication systems face inefficiencies in groupcast service due to improper configuration of limited ranges for Hybrid Automatic Repeat Request (HARQ) feedback, leading to lower efficiency in groupcast communications.
Innovation Solution
A device sends a request for permission to send HARQ feedback in groupcast communication, allowing controlled HARQ feedbacks by determining conditions such as distance and quality of service thresholds, enabling feedback only when permitted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If HARQ feedback is allowed for all groupcast communications within a limited range, then reliability of communication is improved, but device complexity and unnecessary feedback increase
Solution Approach 1:
The patent changes the parameter of feedback permission by introducing a permission request mechanism. Instead of allowing all devices to send feedback unconditionally, the system requires devices to obtain explicit permission before sending HARQ feedback. This parameter change transforms the feedback mechanism from open to controlled, resolving the contradiction between reliability and complexity.
Solution Approach 2:
The patent implements a feedback-based permission control mechanism where the receiving device responds to permission requests with grant or denial decisions. This feedback loop allows the system to dynamically control which transmitting devices can send HARQ feedback, improving reliability while preventing unnecessary feedback and reducing overall system complexity.
2Productivity
If HARQ feedback permission is restricted to reduce unnecessary feedback, then productivity is improved, but reliability may deteriorate
Solution Approach 1:
The patent introduces dynamic control of HARQ feedback permissions. The receiving device can adaptively grant or deny permission based on current communication conditions, device capabilities, and service requirements. This dynamic mechanism allows the system to optimize productivity by restricting unnecessary feedback while maintaining reliability when needed through conditional permission grants.
Solution Approach 2:
The system dynamically changes the permission parameter based on communication conditions. By adjusting whether permission is granted or denied according to real-time factors such as channel quality, device status, and service type, the system achieves both improved productivity through reduced unnecessary feedback and maintained reliability through selective permission approval.
Data Source
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AI summary
Embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media for groupcast communication feedback. According to embodiments of the present disclosure, a second device sends a groupcast communication, a first device, who receives the groupcast communication, determines that a condition is satisfied, and sends a request to the second device for a permission of a hybrid automatic repeat request (HARQ) feedback, based on the determination. In this way, a request may be sent when a condition is satisfied, and thus a NACK feedback while failing to detect the groupcast communication based on the permission. This provides improved efficiency for groupcast service.