Sidelink HARQ Acknowledgement Generation for PSFCH Resource Coordination
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Solution Overview
Problem
Existing sidelink communication protocols in wireless networks face inefficiencies in hybrid automatic repeat request (HARQ) acknowledgement mechanisms, leading to suboptimal data transmission reliability and resource utilization.
Innovation Solution
Implementing a mechanism for generating sidelink HARQ feedback to enhance the reliability and efficiency of data transmission by optimizing resource selection and coordination among wireless devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink HARQ feedback is implemented to improve data transmission reliability, then transmission reliability improves, but device complexity and processing overhead increase
Solution Approach 1:
The patent segments HARQ feedback processing by introducing a first processor for generating feedback information and a second processor for determining resource selection. This division separates the complex feedback generation task from the resource allocation task, allowing each processor to be optimized independently and reducing overall system complexity while maintaining reliability improvements.
Solution Approach 2:
The patent introduces an intermediary mechanism where the first processor generates HARQ feedback information that is then passed to the second processor for resource determination. This intermediary feedback information acts as a mediator between the reliability requirement and the resource allocation decision, enabling the system to achieve reliable transmission without directly coupling the complexity of feedback processing with resource management.
2Reliability
If HARQ feedback mechanisms are enhanced to improve transmission reliability, then reliability improves, but resource utilization efficiency deteriorates due to increased overhead
Solution Approach 1:
The patent implements dynamic resource selection where the second processor determines uplink resources based on the actual HARQ feedback information generated by the first processor. This dynamic approach allows the system to adapt resource allocation to actual transmission needs rather than allocating fixed overhead resources, thereby maintaining high reliability while improving resource utilization efficiency by avoiding unnecessary resource consumption.
Solution Approach 2:
The patent changes the parameter of resource selection from static to dynamic by making resource determination dependent on generated feedback information. This parameter change enables the system to optimize the balance between reliability and resource efficiency, as resources are allocated based on actual feedback requirements rather than predetermined overhead allocations.
3Reliability
If sidelink communication protocols are extended with HARQ feedback generation, then transmission reliability improves, but protocol complexity increases
Solution Approach 1:
The patent segments the protocol processing function into distinct processor modules: a first processor dedicated to HARQ feedback information generation and a second processor dedicated to uplink resource determination. This segmentation isolates the complexity of HARQ feedback generation from the overall protocol stack, making the protocol more manageable and easier to implement while maintaining improved reliability through the added feedback mechanism.
Data Source
AI summary
A wireless device receives one or more configuration parameters indicating: a number of a plurality of physical sidelink feedback channel (PSFCH) resources that are associated with a physical sidelink shared channel (PSSCH) transmission; and a period of the plurality of PSFCH resources. A time interval of two consecutive candidate PSFCH resources, of the plurality of PSFCH resources, is equal to the period of the plurality of PSFCH resources. The wireless device transmits, to a second wireless device and via a first slot, a first PSSCH transmission. The wireless device sends a hybrid automatic repeat request (HARQ) feedback based on: the number of the plurality of PSFCH resources; the period of the plurality of PSFCH resources; and at least one PSFCH reception in a first plurality of PSFCH resources, of the plurality of PSFCH resources. The first plurality of PSFCH resources occur at least one slot after the first slot.