Sidelink Resource Determination for Multi-TRP User Equipments
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing sidelink communications between multiple user equipment (UEs) due to interference and the need for improved resource allocation, particularly in supporting higher reliability and low latency operations.
Innovation Solution
The proposed solution involves configuring UEs with multiple transmission and reception points (TRPs) to determine and allocate time and frequency resources for sidelink communications, where peer UEs can be space-division multiplexed, and adjusting transmit power or beamforming to mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If multiple peer UEs are space-division multiplexed over time and frequency resources, then spectral efficiency is improved, but interference between peer UEs increases
Solution Approach 1:
The patent changes the transmit power parameter of peer UEs to mitigate interference. The serving TRP receives power control feedback from peer UEs and adjusts transmit power parameters to reduce interference while maintaining spectral efficiency gains from space-division multiplexing
Solution Approach 2:
The patent applies preliminary anti-action by having peer UEs send power control feedback messages before actual data transmission. This allows the serving TRP to pre-adjust transmit power parameters to prevent interference before it occurs, enabling safe space-division multiplexing
2Object-generated harmful factors
If transmit power is adjusted to mitigate interference, then interference between peer UEs is reduced, but power consumption increases
Solution Approach 1:
The patent implements a feedback mechanism where peer UEs send power control feedback messages to the serving TRP. This feedback loop allows the system to adjust transmit power parameters dynamically, reducing interference only when necessary and maintaining energy efficiency by avoiding unnecessary power adjustments
Solution Approach 2:
The patent applies partial action by adjusting transmit power parameters only for specific peer UEs that cause or experience interference, rather than increasing power for all UEs. This selective approach mitigates interference while minimizing overall power consumption
3Reliability
If multiple TRPs are configured for sidelink communications, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent uses the serving TRP as an intermediary that manages the complexity of multiple TRP configurations. The serving TRP receives power control feedback from peer UEs and coordinates transmit power adjustments across multiple TRPs, shielding UEs from the complexity of managing multiple TRPs while maintaining improved reliability
4Productivity
If space-division multiplexing is implemented for multiple peer UEs, then productivity is improved, but measurement precision of resource allocation becomes more difficult
Solution Approach 1:
The patent employs feedback mechanisms where peer UEs report power control feedback to the serving TRP. This feedback enables precise measurement and adjustment of resource allocation for each peer UE in the space-division multiplexed configuration, maintaining resource allocation accuracy while improving productivity through parallel communications
Data Source
AI summary
Techniques for wireless communications are described. A user equipment (UE) may be configured with one or multiple transmission and reception points (TRPs). The UE may support sidelink communications, which may be referred to as vehicle-to-everything (V2X) communications systems, vehicle-to-vehicle (V2V) communications systems, and the like. The UE may provide improvements to resource determination for the sidelink communications by determining whether multiple peer UEs can be space-division multiplexed over time and frequency resources. To mitigate interference between the multiple peer UEs, the UE may transmit a power control request message to one or multiple peer UEs to adjust a transmit power level, and a receive a power control response message from the one or multiple peer UEs accepting or rejecting the transmit power level adjustment. As a result, the UE may experience efficient sidelink operations.