Sidelink Carrier Aggregation Feedback Mechanism
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Solution Overview
Problem
The existing 5G NR system does not support multi-carrier sidelink transmission, leading to failures in sidelink transmission services that require carrier aggregation, as each carrier independently performs sensing and resource allocation, resulting in incomplete feedback and incorrect resource allocation.
Innovation Solution
A data transmission method that instructs user equipment (UE) to transmit sidelink data on multiple carriers using scheduling information, and to transmit feedback data on designated feedback carriers, enabling carrier aggregation-based sidelink transmission and supporting HARQ feedback modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If each carrier independently performs sensing and resource allocation, then resource allocation flexibility is improved, but feedback completeness deteriorates and transmission reliability worsens
Solution Approach 1:
The patent merges the sensing and resource allocation operations across multiple carriers into a unified process. Instead of each carrier independently performing these operations, the system performs joint sensing and resource allocation that considers all carriers together, ensuring that feedback is generated based on the combined state of all carriers rather than individual carrier states.
Solution Approach 2:
The patent implements a universal feedback mechanism that operates across all carriers simultaneously. The feedback process is designed to be carrier-agnostic, collecting and processing information from multiple carriers through a single unified feedback channel, thereby ensuring complete feedback coverage regardless of which specific carrier is being monitored.
2Device complexity
If receive-end UE monitors only one carrier, then monitoring complexity is reduced, but transmission result detection accuracy deteriorates
Solution Approach 1:
The patent introduces a unified feedback channel as an intermediary that aggregates transmission result information from multiple carriers. Instead of requiring the receive-end UE to directly monitor and process information from each individual carrier, the system uses this intermediary feedback channel to consolidate and deliver the aggregated transmission results, thereby maintaining monitoring simplicity while ensuring accurate detection of transmission outcomes across all carriers.
3Productivity
If multi-carrier transmission is implemented without unified scheduling, then carrier utilization is improved, but resource allocation consistency deteriorates
Solution Approach 1:
The patent segments the resource allocation process into distinct scheduling and execution phases. The unified scheduling component formulates a comprehensive resource allocation plan that ensures consistency across all carriers, while the execution phase allows each carrier to operate independently according to the coordinated plan. This segmentation enables both high carrier utilization and consistent resource allocation by decoupling the planning from the execution.
Data Source
AI summary
A data transmission method includes: transmitting, in a carrier aggregation scenario based on scheduling information, sidelink data on a data carrier and feedback data on a feedback carrier. The scheduling information is used to schedule the data carrier and/or the feedback carrier, and the feedback data is used to indicate a transmission result of the sidelink data.