Sidelink HARQ Feedback Resource Allocation Collision Prevention
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Solution Overview
Problem
In next-generation radio access networks, particularly in the NR environment, there is a challenge in preventing collisions between sidelink SS/PSBCH blocks and HARQ feedback information transmissions, which can lead to interference and degrade signal quality during sidelink data channel receptions.
Innovation Solution
The method involves configuring sidelink resource pools to exclude slots allocated for sidelink SS/PSBCH blocks, allowing HARQ feedback information to be transmitted through physical sidelink feedback channels (PSFCH) without overlapping with sidelink SS/PSBCH blocks, thereby preventing collisions and ensuring reliable data channel receptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sidelink resource pools include all available slots for HARQ feedback transmission, then the productivity of HARQ feedback transmission is improved, but collisions with sidelink SS/PSBCH blocks occur degrading signal quality
Solution Approach 1:
The patent extracts and removes slots containing sidelink SS/PSBCH blocks from the sidelink resource pool configuration. By identifying and excluding these specific slots where synchronization signals are transmitted, the system prevents HARQ feedback transmissions from colliding with SS/PSBCH blocks, thereby eliminating signal quality degradation while maintaining efficient resource utilization in remaining slots
2Reliability
If sidelink resource pools exclude slots with sidelink SS/PSBCH blocks, then collision prevention and signal quality are improved, but the quantity of available resources for HARQ feedback is reduced
Solution Approach 1:
The patent applies preliminary action by pre-configuring the sidelink resource pool to exclude slots containing sidelink SS/PSBCH blocks before HARQ feedback transmission occurs. This advance configuration ensures that UEs select feedback resources from slots guaranteed to be free of SS/PSBCH transmissions, thereby ensuring reliable reception without requiring complex real-time collision detection or resolution mechanisms
Data Source
AI summary
to the provided are a method and an apparatus for transmitting/receiving sidelink HARQ feedback information. The method for transmitting the HARQ feedback information for sidelink transmission by a user equipment (UE) may include receiving configuration information for a sidelink resource pool for the sidelink transmission, receiving a physical sidelink shared channel (PSSCH) from another UE through a resource allocated in the sidelink resource pool, and transmitting the HARQ feedback information for reception of the PSSCH through a physical sidelink feedback channel (PSFCH) resource allocated in the sidelink resource pool.