V2X PSSCH-RSRP Compensation for Resource Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current V2X communication systems face challenges in reducing minimum data transmission delay and adopting multi-antenna transmission technology to support applications with demanding latency requirements while increasing data reception success rates.
Innovation Solution
A data transmission method that involves detecting a Physical Sidelink Control Channel (PSCCH) and compensating the Physical Sidelink Shared Channel's Demodulation Reference Signal Receiving Power (PSSCH-RSRP) to determine available candidate single-subframe resources, allowing for efficient transmission using these resources, thereby reducing resource preemption and improving latency and reception success.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-antenna transmission technology is adopted, then data reception success rate is improved, but resource preemption increases and transmission delay increases
Solution Approach 1:
The patent applies preliminary action by having the first UE detect PSCCH and compensate PSSCH-RSRP in advance before resource selection. This preliminary measurement and compensation of reference signal receiving power enables the first UE to accurately assess channel conditions and make informed resource selection decisions, thereby supporting multi-antenna transmission while controlling transmission delay through proactive resource allocation.
2Loss of time
If resource selection window is reduced to lower latency, then transmission delay is reduced, but available candidate resources decrease
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the resource selection window size based on channel conditions and transmission requirements. The system modifies the window parameters adaptively, allowing reduction when latency is critical while maintaining sufficient candidate resources through intelligent compensation of PSSCH-RSRP values, thus balancing latency reduction with resource availability.
3Reliability
If PSSCH-RSRP compensation is applied, then resource preemption is reduced, but measurement and calculation complexity increases
Solution Approach 1:
The patent applies the intermediary principle by introducing PSSCH-RSRP compensation as a mediating mechanism between channel measurement and resource selection. This compensation value acts as an intermediary parameter that adjusts the raw measurement to account for multi-antenna effects, thereby reducing resource preemption without requiring complex direct analysis of multi-antenna channel conditions, thus simplifying the overall system complexity.
Data Source
AI summary
A data transmission method, by a first UE is provided. The method includes detecting, on one or more carriers, a Physical Sidelink Control Channel (PSCCH) transmitted by a second UE, compensating, on each of the carriers, a Physical Sidelink Shared Channel's Demodulation Reference Signal Receiving Power (PSSCH-RSRP) of the second UE according to the detected PSCCH, determining, on each of the carriers, available candidate single-subframe resources according to the compensated PSSCH-RSRP, and transmitting the Physical Sidelink Shared Channel (PSSCH) using at least one of the available candidate single-subframe resources determined on all of the carriers.