Uplink Sidelink Transmission Prioritization in 5G Networks
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Solution Overview
Problem
Current 5G radio access technologies face challenges in transmission prioritization between uplink and sidelink transmissions, particularly for physical layer common control channels like SL-PSFCH and SL-BCH, where logic channel priorities are not assigned, leading to inefficiencies in data transmission.
Innovation Solution
The proposed solution involves a UE that establishes an SL connection in a wireless network, performing prioritization between sidelink feedback channel (PSFCH) and uplink transmissions based on logic channel priorities, prioritizing PSFCH over UL when the highest logic channel priority of UL is higher than a configured threshold, and vice versa, ensuring efficient data transmission even when transmissions overlap in a shared carrier frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transmission prioritization is implemented for sidelink and uplink channels, then data transmission efficiency is improved, but device complexity increases due to priority comparison and decision-making mechanisms
Solution Approach 1:
The patent introduces a priority threshold parameter that simplifies the transmission prioritization decision-making process. Instead of complex multi-parameter comparisons, the system uses a configured threshold value to determine whether to prioritize sidelink or uplink transmissions, reducing device complexity while maintaining efficient data transmission.
Solution Approach 2:
The priority threshold is pre-configured before transmission occurs, allowing the UE to make rapid transmission decisions without complex real-time calculations. This preliminary setup of prioritization rules reduces the computational burden during actual transmission, improving efficiency while lowering device complexity.
2Reliability
If logic channel priority thresholds are configured for transmission prioritization, then transmission reliability is improved, but ease of operation decreases due to additional configuration requirements
Solution Approach 1:
The system performs self-configuration of transmission priorities through automatic threshold comparison. The UE autonomously compares the logic channel priority of sidelink and uplink transmissions against the configured threshold without requiring manual intervention or complex configuration procedures, maintaining reliability while simplifying operation.
Solution Approach 2:
The transmission prioritization mechanism incorporates feedback loops where the UE monitors transmission outcomes and adjusts priority decisions based on observed performance. This feedback mechanism ensures reliable transmission while allowing the system to adapt to changing conditions without requiring frequent reconfiguration.
3Device complexity
If simultaneous transmission of sidelink PSFCH and uplink channels is allowed, then device complexity is reduced, but loss of information occurs due to transmission collisions in shared carrier frequency
Solution Approach 1:
The system performs preliminary priority comparison before transmission occurs, determining which channel should be transmitted first based on logic channel priorities and configured thresholds. This advance decision-making prevents transmission collisions and information loss while maintaining simple device architecture.
Solution Approach 2:
The patent extracts the priority decision-making function from the physical transmission layer and places it in the MAC layer. By separating the prioritization logic from the transmission mechanism, the system avoids information loss due to collisions while keeping the physical layer simple and the overall device complexity manageable.
Data Source
AI summary
Apparatus and methods are provided for transmission prioritization between uplink and sidelink. In one novel aspect, transmission prioritization is performed between uplink data transmission and sidelink physical channel/signal transmissions, including feedback channel (PSFCH). In one embodiment, PSFCH transmission is prioritized over the UL transmission when the highest logic channel priority value of the UL transmission with available data is larger than a configured UL priority threshold. In another embodiment, the transmission of the PSFCH is prioritized over the transmission of the UL channel when the transmission of the PSFCH is prioritized over the transmission of the UL channel when a highest logic channel priority value of the UL transmission with available data is larger than a configured UL priority threshold and a highest logic channel priority value of the SL transmission for the transceiving SL channel is lower than a configured SL priority threshold; otherwise, the UL transmission is prioritized.