Multi-TRP Full Duplex Sidelink-Uplink Interference Isolation
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Solution Overview
Problem
Existing wireless communication systems face challenges in enabling simultaneous sidelink and uplink full duplex communication with multiple transmission and reception points, particularly in vehicle-to-everything (V2X) scenarios, due to high interference and limited spectrum efficiency.
Innovation Solution
The implementation of techniques for sidelink and uplink full duplex communication using multiple transmission and reception points (TRPs) in user equipment (UEs), where UEs determine the availability of full duplex communication based on signal measurements, enabling simultaneous reception of sidelink communication from a first TRP and transmission to a base station via a second TRP, while managing self-interference to improve spectrum efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full duplex communication is implemented with multiple TRPs, then communication reliability and spectrum efficiency are improved, but interference management complexity increases
Solution Approach 1:
The UE divides the communication function into multiple independent TRPs (first TRP for SL reception, second TRP for UL transmission). Each TRP operates semi-independently with dedicated beamforming, allowing parallel communication channels that reduce mutual interference while maintaining system reliability through spatial diversity.
Solution Approach 2:
Beamforming acts as an intermediary mechanism between the multiple TRPs and the communication channels. By applying spatial filtering and directional transmission/reception, beamforming isolates the interference paths and enables the UE to simultaneously handle SL and UL communications with reduced interference impact.
2Productivity
If simultaneous SL and UL transmission/reception is enabled, then spectrum efficiency is improved, but self-interference increases
Solution Approach 1:
The system transitions from temporal or frequency domain separation to spatial domain separation by using multiple TRPs in different spatial locations. This dimensional shift allows simultaneous SL and UL communications on the same time-frequency resources while using spatial isolation to mitigate self-interference through directional beamforming.
Solution Approach 2:
Each TRP is configured with dedicated beamforming parameters optimized for its specific communication function. The first TRP uses beamforming optimized for SL reception, while the second TRP uses beamforming optimized for UL transmission, creating localized quality improvements that reduce mutual interference through spatial directionality.
3Area of stationary object
If multiple TRPs are used for full duplex communication, then coverage and capacity are improved, but resource allocation complexity increases
Solution Approach 1:
The multiple TRPs serve universal communication functions for both SL and UL operations. Each TRP can independently handle different communication types, allowing the system to achieve enhanced coverage and capacity while using standardized resource allocation procedures that work across different TRP configurations and communication modes.
Data Source
AI summary
Techniques for sidelink (SL) and uplink (UL) full duplex communication with multiple transmission and reception points (multi-TRP) may be performed. In an example, a user equipment (UE) may determine full duplex communication, including simultaneous reception of a SL communication from an SL UE via a first TRP of the UE and transmission of a UL transmission to a base station via a second TRP of the UE, is available. The UE may enable the full duplex communication. The UE may receive, from the SL UE, the SL communication via the first TRP. The UE may transmit, to the base station while simultaneously receiving the SL communication, the UL transmission via the second TRP.