Selective Uplink-Sidelink Feedback Scheduling for Overlapping V2X Slots
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Solution Overview
Problem
Existing V2X communication systems face challenges in efficiently managing overlapping time slots for uplink and sidelink feedback transmissions, leading to potential interference and reduced communication effectiveness.
Innovation Solution
Implementing a baseband processor to prioritize sidelink or uplink transmissions based on priority determination, allowing simultaneous transmission of both with reduced interference through dual radios, or prioritizing one over the other, and using slot aggregation and selective prioritization techniques for PSFCH messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wireless device transmits both uplink and sidelink feedback messages in overlapping time slots, then communication coverage is improved, but interference between transmissions increases
Solution Approach 1:
The patent changes the power parameter by transmitting the sidelink acknowledgment message with reduced power when uplink transmission is prioritized, thereby reducing interference while maintaining communication effectiveness. This parameter adjustment allows the device to balance between reliable communication and interference mitigation.
2Reliability
If uplink transmission is prioritized over sidelink feedback, then uplink communication reliability is improved, but sidelink acknowledgment delivery is delayed or lost
Solution Approach 1:
The patent applies partial action by transmitting the sidelink acknowledgment with reduced power rather than fully dropping it. This partial transmission maintains some level of sidelink acknowledgment delivery while prioritizing uplink transmission, preventing complete information loss while ensuring uplink reliability.
3Reliability
If sidelink acknowledgment is transmitted in overlapping time slots, then sidelink communication reliability is improved, but uplink transmission is interfered with
Solution Approach 1:
The patent implements dynamic prioritization where the wireless device determines priority based on current transmission conditions and adjusts the sidelink acknowledgment power accordingly. This dynamic approach allows the system to adaptively balance sidelink reliability and uplink protection based on real-time requirements.
4Reliability
If the wireless device uses dual radios to transmit both messages simultaneously, then communication coverage is improved, but device complexity increases
Solution Approach 1:
The patent employs dual radios where one radio is configured for uplink transmission and another for sidelink feedback transmission. This multi-functionality allows simultaneous operation of both communication types, improving coverage while managing complexity through dedicated radio assignment.
Data Source
AI summary
Embodiments are presented herein of apparatuses, systems, baseband processors, and methods for performing uplink communications and vehicle-to-everything sidelink communication. A wireless device receives first control information through a sidelink control channel specifying one or more first time slots for the wireless device to transmit a sidelink acknowledgment message over a sidelink feedback channel. The wireless device receives a resource grant through a downlink control channel, wherein the resource grant specifies one or more second time slots for the wireless device to transmit an uplink transmission over an uplink channel. The first and second time slots at least partially overlap, and it is selectively determined whether to transmit the sidelink acknowledgment message or the uplink transmission during the overlapping time slots.