Sidelink HARQ Time Gap Management in Network Scheduling
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing time gaps for sidelink Hybrid Automatic Request (HARQ) in network scheduling mode, particularly in ensuring optimal resource allocation and minimizing latency in sidelink transmissions.
Innovation Solution
A method and apparatus that allow devices to receive sidelink grants, determine the minimum time gap between adjacent sidelink resources, and adjust sidelink transmissions accordingly, enabling the selection of sidelink logical channels with enabled or disabled HARQ feedback to optimize data multiplexing and resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple sidelink resources are scheduled with small time gaps to increase resource utilization, then productivity is improved, but reliability deteriorates due to insufficient time for HARQ feedback processing
Solution Approach 1:
The patent applies dynamics by making the time gap between sidelink resources adjustable rather than fixed. The system dynamically determines the time gap based on the number of resources to be scheduled, allowing smaller gaps when more resources are available and larger gaps when fewer resources are scheduled, thus optimizing both productivity and reliability under different conditions
Solution Approach 2:
The patent changes the parameter of time gap between sidelink resources based on the number of resources being scheduled. By varying this temporal parameter dynamically, the system achieves efficient resource utilization when time gaps are small while ensuring adequate processing time when resources are spaced apart, resolving the contradiction between productivity and reliability
2Reliability
If time gap between sidelink resources is increased to ensure reliable HARQ feedback, then reliability is improved, but productivity deteriorates due to reduced resource allocation efficiency
Solution Approach 1:
The system dynamically adjusts the time gap parameter based on the number of sidelink resources being scheduled. When fewer resources are scheduled, larger time gaps are used to ensure reliable HARQ feedback processing. When more resources are scheduled, smaller time gaps are employed to maximize resource allocation efficiency, thus resolving the contradiction adaptively
Solution Approach 2:
The patent applies parameter changes by varying the time gap between sidelink resources according to the scheduling requirements. This dynamic parameter adjustment allows the system to optimize reliability when needed and maximize productivity when conditions permit, eliminating the need for a fixed conservative time gap
3Device complexity
If fixed time gap is used for all sidelink resources to simplify scheduling, then device complexity is reduced, but productivity deteriorates due to suboptimal resource allocation
Solution Approach 1:
The patent transitions from a static fixed time gap approach to a dynamic time gap determination mechanism. The system automatically calculates appropriate time gaps based on the number of resources to be scheduled, eliminating the need for complex manual scheduling while achieving optimal resource allocation. This dynamic approach resolves the contradiction by automating the complexity management
Solution Approach 2:
The scheduling system performs self-service by automatically determining appropriate time gaps based on the number of resources being scheduled. Rather than requiring external intervention or complex configuration, the system autonomously optimizes time gaps to maximize resource allocation efficiency, thus reducing device complexity while improving productivity
Data Source
AI summary
A method and apparatus such as a device to perform sidelink communication including receiving a sidelink grant from a network node, wherein the sidelink grant schedules or assigns multiple sidelink resources, generating a data packet comprising or multiplexing sidelink data from Sidelink (SL) logical channel(s) with SL Hybrid Automatic Request (HARQ) feedback enabled, performing two sidelink transmissions for the data packet on two adjacent, neighbor, or consecutive sidelink resources among the multiple sidelink resources if a time gap of the two adjacent, neighbor, or consecutive sidelink resources is larger than or equal to a minimum time gap, and the device being allowed to drop, skip, or cancel a sidelink transmission on one sidelink resource of the two adjacent, neighbor, or consecutive sidelink resources among the multiple sidelink resources if the time gap of the two adjacent, neighbor, or consecutive sidelink resources is less than a minimum time gap.