Sidelink Feedback Resource Allocation for 5G Carrier Aggregation
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Solution Overview
Problem
Current 5G and NR networks lack a specified mechanism for sidelink feedback resource allocation, particularly for carrier aggregation scenarios, leading to inefficiencies in HARQ feedback transmission and reception across multiple carriers and resource pools.
Innovation Solution
The proposed solution involves configuring physical resource blocks (PRBs) for sidelink feedback channels (PSFCH) separately or jointly across multiple carriers and resource pools, using sidelink configuration information to allocate resources effectively, including index and cyclic shift parameters, to enable efficient HARQ feedback transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If sidelink feedback resources are allocated for multiple carriers or resource pools, then HARQ feedback transmission capability is improved, but resource allocation complexity increases
Solution Approach 1:
The patent segments the resource allocation by introducing separate configuration parameters for different carriers and resource pools. Specifically, it divides the feedback resources into distinct PSFCH resource pools, each associated with specific carriers or resource pools, allowing independent configuration and management of feedback resources for each segment.
Solution Approach 2:
The patent adds a new dimension to resource allocation by introducing carrier-specific and resource pool-specific configuration parameters. This multi-dimensional approach allows the system to allocate feedback resources not just in time-frequency domain but also across carrier and resource pool dimensions, enabling more flexible and scalable resource management.
2Adaptability or versatility
If separate PRB configuration is used for PSFCH across multiple carriers, then feedback resource allocation flexibility is improved, but configuration overhead increases
Solution Approach 1:
The patent implements universal configuration parameters that can apply across multiple carriers and resource pools. By defining common PSFCH configuration parameters at a higher level that can be reused across different carriers, the system achieves flexibility without proportionally increasing configuration overhead for each individual carrier.
Solution Approach 2:
The patent allows local customization of PSFCH parameters for specific carriers or resource pools where needed, while maintaining default or shared configurations for other parameters. This selective local quality approach enables flexible resource allocation only where necessary, reducing overall configuration overhead.
3Productivity
If sidelink feedback resource allocation mechanism is implemented, then network throughput is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic feedback transmission mechanisms where HARQ feedback is sent at specific intervals or occasions rather than continuously. By scheduling PSFCH transmissions periodically or event-driven based on actual data transmission needs, the system maintains high throughput when data is being exchanged while reducing power consumption during idle periods.
Data Source
AI summary
Embodiments of the present application relate to methods and apparatuses for a sidelink feedback resource allocation mechanism. According to an embodiment of the present application, a user equipment (UE) includes a processor and a transceiver coupled to the processor; and the processor is configured: to receive, via the transceiver from a network node, sidelink configuration information regarding allocating one or more sidelink feedback resources for multiple carriers or multiple resource pools; and to transmit, via the transceiver over a sidelink, hybrid automatic repeat request (HARQ) feedback information on the one or more sidelink feedback resources.