PSFCH Resource Configuration for Sidelink HARQ Feedback
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Solution Overview
Problem
Current 5G NR systems face challenges in efficiently configuring radio resources for sidelink HARQ feedback information transmission, particularly in device-to-device communication scenarios like V2X, where different usage scenarios require flexible frame structures and numerologies to meet varying requirements for data rates, latency, and reliability.
Innovation Solution
The method involves configuring physical sidelink feedback channel (PSFCH) resources within a resource pool to transmit HARQ feedback information, where user equipment (UE) receives configuration information for frequency resources and transmits feedback in response to a physical sidelink shared channel (PSSCH) using determined PSFCH resources, allowing for flexible and efficient sidelink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible frame structures and numerologies are designed to meet different usage scenario requirements, then adaptability and data transmission rates are improved, but device complexity and resource configuration difficulty increase
Solution Approach 1:
The resource pool is segmented into multiple sub-pools, each associated with specific numerologies (e.g., first numerology and second numerology). This segmentation allows the system to handle different usage scenarios (eMBB, mMTC, URLLC) with different frame structures and numerologies in an organized manner, improving adaptability while managing complexity through structured organization.
Solution Approach 2:
The system dynamically determines which sub-pool to use based on the numerology required for a given transmission. The base station configures multiple sub-pools with different numerologies, and the selection is dynamically adjusted based on usage scenario requirements, enabling flexible adaptation without requiring complete redesign of the entire frame structure.
2Productivity
If multiple numerologies are multiplexed to satisfy different usage scenario requirements, then data transmission rates and latency performance are improved, but resource configuration and management difficulty increase
Solution Approach 1:
The resource pool is divided into multiple sub-pools, where each sub-pool is dedicated to a specific numerology. This segmentation allows independent configuration and management of each numerology's resources, enabling optimized data transmission rates for different usage scenarios while simplifying resource configuration through dedicated pools rather than mixed management.
Solution Approach 2:
Each sub-pool is configured with specific local parameters (numerology, frame structure, resource allocation) tailored to its usage scenario. This local quality approach allows each numerology to be optimized for its specific purpose (e.g., low latency for URLLC, high throughput for eMBB) without affecting other numerologies, thereby improving overall productivity while managing configuration complexity locally.
3Productivity
If PSFCH resources are dynamically configured in the resource pool, then HARQ feedback transmission efficiency is improved, but control information overhead increases
Solution Approach 1:
The resource pool is segmented into sub-pools, and PSFCH resources are configured within specific sub-pools rather than uniformly across the entire pool. This segmentation allows PSFCH resources to be dynamically allocated only where needed for specific numerologies and usage scenarios, improving HARQ feedback transmission efficiency while minimizing control information overhead by avoiding unnecessary configurations in unused sub-pools.
Solution Approach 2:
The base station performs preliminary configuration of PSFCH resources in the resource pool, defining the structure and allocation rules in advance. This preliminary action enables efficient HARQ feedback transmission during actual operation without requiring dynamic reconfiguration, thereby improving transmission efficiency while keeping control information overhead manageable through pre-established configurations.
Data Source
AI summary
Provided are methods and apparatuses for transmitting and/or receiving sidelink HARQ feedback information. Further, a method of a user equipment (UE) may be provided for transmitting HARQ feedback information in response to sidelink transmission. The method may include: receiving configuration information for a resource pool for the sidelink transmission, receiving configuration information on frequency resources for transmission of a physical sidelink feedback channel (PSFCH) in the resource pool, and transmitting HARQ feedback information in response to a physical sidelink shared channel (PSSCH) received from one or more other UE(s) using a PSFCH resource determined based on the configuration information for frequency resources in the resource pool.