Sidelink Feedback Resource Merging for Lower RedCap UE Power
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Solution Overview
Problem
In sidelink communication systems, terminals with reduced capability (RedCap UE) experience high power consumption due to frequent transmission/reception of Physical Sidelink Feedback Channel (PSFCH) resources, which is not efficiently managed in existing technologies.
Innovation Solution
A method for sidelink feedback information transmission where a first transport block is sent on multiple physical sidelink shared channel (PSSCH) resources, and feedback information is received on a physical sidelink feedback channel (PSFCH) resource, optimizing the process to reduce unnecessary transmissions and conserve power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each PSSCH corresponds to a PSFCH feedback resource, then feedback reliability is improved, but power consumption increases due to frequent transmissions
Solution Approach 1:
The patent merges multiple PSFCH feedback resources into a single consolidated feedback resource. Instead of having separate PSFCH resources for each PSSCH transmission, multiple PSSCH transmissions share a common PSFCH resource, reducing the total number of feedback transmissions required while maintaining reliable feedback coverage for all transport blocks
Solution Approach 2:
The single PSFCH feedback resource serves multiple PSSCH transmissions universally. This multi-functional approach allows one feedback resource to provide acknowledgment information for multiple transport blocks, eliminating the need for dedicated feedback resources for each individual PSSCH and thereby reducing overall power consumption
2Loss of time
If each PSSCH corresponds to a PSFCH feedback resource, then feedback timeliness is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple feedback resources into one, which simplifies resource management by reducing the number of resources that need to be tracked and coordinated. While individual feedback timing is consolidated, the overall system complexity is reduced through this merging approach
3Use of energy by moving object
If feedback resources are consolidated, then power consumption is reduced, but feedback reliability may deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the receiving terminal provides acknowledgment information (ACK/NACK) for multiple transport blocks through the consolidated PSFCH resource. This feedback loop ensures that the transmitting terminal can reliably determine which transport blocks were successfully received and which require retransmission, maintaining reliability while using fewer resources
Solution Approach 2:
The patent establishes predetermined rules and configurations for the consolidated feedback resource, including timing relationships and resource allocation patterns, before actual data transmission begins. This preliminary configuration ensures that feedback reliability is maintained through pre-planned resource coordination without requiring complex real-time decisions
Data Source
AI summary
A method for sidelink feedback information transmission, applied to a first terminal, includes that: the first terminal sends a first transport block to a second terminal on a plurality of first physical sidelink shared channel (PSSCH) resources; and the first terminal receives first feedback information from the second terminal on a first physical sidelink feedback channel (PSFCH) resource, where the first feedback information is feedback for reception of the first transport block by the second terminal on the plurality of first PSSCH resources. There is also provided a first terminal and a second terminal.